if_spppsubr.c revision 1.233
1 /* $NetBSD: if_spppsubr.c,v 1.233 2021/05/11 01:27:45 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 1.233 2021/05/11 01:27:45 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 (*screply)(const struct cp *, struct sppp *, u_char, 262 uint8_t, size_t, void *); 263 264 /* message parser */ 265 enum cp_rcr_type 266 (*parse_confreq)(struct sppp *, struct lcp_header *, int, 267 uint8_t **, size_t *, size_t *); 268 void (*parse_confrej)(struct sppp *, struct lcp_header *, int); 269 void (*parse_confnak)(struct sppp *, struct lcp_header *, int); 270 }; 271 272 enum auth_role { 273 SPPP_AUTH_NOROLE = 0, 274 SPPP_AUTH_SERV = __BIT(0), 275 SPPP_AUTH_PEER = __BIT(1), 276 }; 277 278 static struct sppp *spppq; 279 static kmutex_t *spppq_lock = NULL; 280 static callout_t keepalive_ch; 281 282 #define SPPPQ_LOCK() if (spppq_lock) \ 283 mutex_enter(spppq_lock); 284 #define SPPPQ_UNLOCK() if (spppq_lock) \ 285 mutex_exit(spppq_lock); 286 287 #define SPPP_LOCK(_sp, _op) rw_enter(&(_sp)->pp_lock, (_op)) 288 #define SPPP_UNLOCK(_sp) rw_exit(&(_sp)->pp_lock) 289 #define SPPP_WLOCKED(_sp) rw_write_held(&(_sp)->pp_lock) 290 #define SPPP_UPGRADE(_sp) do{ \ 291 SPPP_UNLOCK(_sp); \ 292 SPPP_LOCK(_sp, RW_WRITER); \ 293 }while (0) 294 #define SPPP_DOWNGRADE(_sp) rw_downgrade(&(_sp)->pp_lock) 295 #define SPPP_WQ_SET(_wk, _func, _arg) \ 296 sppp_wq_set((_wk), (_func), __UNCONST((_arg))) 297 298 #ifdef INET 299 #ifndef SPPPSUBR_MPSAFE 300 /* 301 * The following disgusting hack gets around the problem that IP TOS 302 * can't be set yet. We want to put "interactive" traffic on a high 303 * priority queue. To decide if traffic is interactive, we check that 304 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 305 * 306 * XXX is this really still necessary? - joerg - 307 */ 308 static u_short interactive_ports[8] = { 309 0, 513, 0, 0, 310 0, 21, 0, 23, 311 }; 312 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 313 #endif /* SPPPSUBR_MPSAFE */ 314 #endif 315 316 /* almost every function needs these */ 317 #define STDDCL \ 318 struct ifnet *ifp = &sp->pp_if; \ 319 int debug = ifp->if_flags & IFF_DEBUG 320 321 static int sppp_output(struct ifnet *, struct mbuf *, 322 const struct sockaddr *, const struct rtentry *); 323 324 static void sppp_cisco_send(struct sppp *, int, int32_t, int32_t); 325 static void sppp_cisco_input(struct sppp *, struct mbuf *); 326 327 static void sppp_cp_init(const struct cp *, struct sppp *); 328 static void sppp_cp_fini(const struct cp *, struct sppp *); 329 static void sppp_cp_input(const struct cp *, struct sppp *, 330 struct mbuf *); 331 static void sppp_cp_input(const struct cp *, struct sppp *, 332 struct mbuf *); 333 static void sppp_cp_send(struct sppp *, u_short, u_char, 334 u_char, u_short, void *); 335 /* static void sppp_cp_timeout(void *arg); */ 336 static void sppp_cp_change_state(const struct cp *, struct sppp *, int); 337 static struct workqueue * 338 sppp_wq_create(struct sppp *, const char *, pri_t, int, int); 339 static void sppp_wq_destroy(struct sppp *, struct workqueue *); 340 static void sppp_wq_set(struct sppp_work *, 341 void (*)(struct sppp *, void *), void *); 342 static void sppp_wq_add(struct workqueue *, struct sppp_work *); 343 static void sppp_wq_wait(struct workqueue *, struct sppp_work *); 344 static void sppp_cp_to_lcp(void *); 345 static void sppp_cp_to_ipcp(void *); 346 static void sppp_cp_to_ipv6cp(void *); 347 static void sppp_auth_send(const struct cp *, struct sppp *, 348 unsigned int, unsigned int, ...); 349 static int sppp_auth_role(const struct cp *, struct sppp *); 350 static void sppp_auth_to_event(struct sppp *, void *); 351 static void sppp_auth_screply(const struct cp *, struct sppp *, 352 u_char, uint8_t, size_t, void *); 353 static void sppp_up_event(struct sppp *, void *); 354 static void sppp_down_event(struct sppp *, void *); 355 static void sppp_open_event(struct sppp *, void *); 356 static void sppp_close_event(struct sppp *, void *); 357 static void sppp_to_event(struct sppp *, void *); 358 static void sppp_rcr_event(struct sppp *, void *); 359 static void sppp_rca_event(struct sppp *, void *); 360 static void sppp_rcn_event(struct sppp *, void *); 361 static void sppp_rtr_event(struct sppp *, void *); 362 static void sppp_rta_event(struct sppp *, void *); 363 static void sppp_rxj_event(struct sppp *, void *); 364 365 static void sppp_null(struct sppp *); 366 static void sppp_tls(const struct cp *, struct sppp *); 367 static void sppp_tlf(const struct cp *, struct sppp *); 368 static void sppp_screply(const struct cp *, struct sppp *, 369 u_char, uint8_t, size_t, void *); 370 static void sppp_ifdown(struct sppp *, void *); 371 372 static void sppp_lcp_init(struct sppp *); 373 static void sppp_lcp_up(struct sppp *, void *); 374 static void sppp_lcp_down(struct sppp *, void *); 375 static void sppp_lcp_open(struct sppp *, void *); 376 static enum cp_rcr_type 377 sppp_lcp_confreq(struct sppp *, struct lcp_header *, int, 378 uint8_t **, size_t *, size_t *); 379 static void sppp_lcp_confrej(struct sppp *, struct lcp_header *, int); 380 static void sppp_lcp_confnak(struct sppp *, struct lcp_header *, int); 381 static void sppp_lcp_tlu(struct sppp *); 382 static void sppp_lcp_tld(struct sppp *); 383 static void sppp_lcp_tls(const struct cp *, struct sppp *); 384 static void sppp_lcp_tlf(const struct cp *, struct sppp *); 385 static void sppp_lcp_scr(struct sppp *); 386 static void sppp_lcp_check_and_close(struct sppp *); 387 static int sppp_cp_check(struct sppp *, u_char); 388 389 static void sppp_ipcp_init(struct sppp *); 390 static void sppp_ipcp_open(struct sppp *, void *); 391 static void sppp_ipcp_close(struct sppp *, void *); 392 static enum cp_rcr_type 393 sppp_ipcp_confreq(struct sppp *, struct lcp_header *, int, 394 uint8_t **, size_t *, size_t *); 395 static void sppp_ipcp_confrej(struct sppp *, struct lcp_header *, int); 396 static void sppp_ipcp_confnak(struct sppp *, struct lcp_header *, int); 397 static void sppp_ipcp_tlu(struct sppp *); 398 static void sppp_ipcp_scr(struct sppp *); 399 400 static void sppp_ipv6cp_init(struct sppp *); 401 static void sppp_ipv6cp_open(struct sppp *, void *); 402 static enum cp_rcr_type 403 sppp_ipv6cp_confreq(struct sppp *, struct lcp_header *, int, 404 uint8_t **, size_t *, size_t *); 405 static void sppp_ipv6cp_confrej(struct sppp *, struct lcp_header *, int); 406 static void sppp_ipv6cp_confnak(struct sppp *, struct lcp_header *, int); 407 static void sppp_ipv6cp_tlu(struct sppp *); 408 static void sppp_ipv6cp_scr(struct sppp *); 409 410 static void sppp_pap_input(struct sppp *, struct mbuf *); 411 static void sppp_pap_init(struct sppp *); 412 static void sppp_pap_tlu(struct sppp *); 413 static void sppp_pap_scr(struct sppp *); 414 static void sppp_pap_scr(struct sppp *); 415 416 static void sppp_chap_input(struct sppp *, struct mbuf *); 417 static void sppp_chap_init(struct sppp *); 418 static void sppp_chap_open(struct sppp *, void *); 419 static void sppp_chap_tlu(struct sppp *); 420 static void sppp_chap_scr(struct sppp *); 421 static void sppp_chap_rcv_challenge_event(struct sppp *, void *); 422 423 static const char *sppp_auth_type_name(u_short, u_char); 424 static const char *sppp_cp_type_name(u_char); 425 static const char *sppp_dotted_quad(uint32_t); 426 static const char *sppp_ipcp_opt_name(u_char); 427 #ifdef INET6 428 static const char *sppp_ipv6cp_opt_name(u_char); 429 #endif 430 static const char *sppp_lcp_opt_name(u_char); 431 static const char *sppp_phase_name(int); 432 static const char *sppp_proto_name(u_short); 433 static const char *sppp_state_name(int); 434 static int sppp_params(struct sppp *, u_long, void *); 435 #ifdef INET 436 static void sppp_get_ip_addrs(struct sppp *, uint32_t *, uint32_t *, uint32_t *); 437 static void sppp_set_ip_addrs(struct sppp *); 438 static void sppp_clear_ip_addrs(struct sppp *); 439 #endif 440 static void sppp_keepalive(void *); 441 static void sppp_phase_network(struct sppp *); 442 static void sppp_print_bytes(const u_char *, u_short); 443 static void sppp_print_string(const char *, u_short); 444 #ifdef INET6 445 static void sppp_get_ip6_addrs(struct sppp *, struct in6_addr *, 446 struct in6_addr *, struct in6_addr *); 447 #ifdef IPV6CP_MYIFID_DYN 448 static void sppp_set_ip6_addr(struct sppp *, const struct in6_addr *); 449 static void sppp_gen_ip6_addr(struct sppp *, const struct in6_addr *); 450 #endif 451 static void sppp_suggest_ip6_addr(struct sppp *, struct in6_addr *); 452 #endif 453 454 static void sppp_notify_up(struct sppp *); 455 static void sppp_notify_down(struct sppp *); 456 static void sppp_notify_tls_wlocked(struct sppp *); 457 static void sppp_notify_tlf_wlocked(struct sppp *); 458 #ifdef INET6 459 static void sppp_notify_con_wlocked(struct sppp *); 460 #endif 461 static void sppp_notify_con(struct sppp *); 462 463 static void sppp_notify_chg_wlocked(struct sppp *); 464 465 /* our control protocol descriptors */ 466 static const struct cp lcp = { 467 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 468 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, 469 sppp_close_event, sppp_to_event, 470 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, 471 sppp_lcp_tlf, sppp_lcp_scr, sppp_screply, 472 sppp_lcp_confreq, sppp_lcp_confrej, sppp_lcp_confnak 473 }; 474 475 static const struct cp ipcp = { 476 PPP_IPCP, IDX_IPCP, 477 #ifdef INET 478 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 479 #else 480 0, 481 #endif 482 "ipcp", 483 sppp_up_event, sppp_down_event, sppp_ipcp_open, 484 sppp_ipcp_close, sppp_to_event, 485 sppp_ipcp_tlu, sppp_null, sppp_tls, 486 sppp_tlf, sppp_ipcp_scr, sppp_screply, 487 sppp_ipcp_confreq, sppp_ipcp_confrej, sppp_ipcp_confnak, 488 }; 489 490 static const struct cp ipv6cp = { 491 PPP_IPV6CP, IDX_IPV6CP, 492 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 493 CP_NCP, 494 #else 495 0, 496 #endif 497 "ipv6cp", 498 sppp_up_event, sppp_down_event, sppp_ipv6cp_open, 499 sppp_close_event, sppp_to_event, 500 sppp_ipv6cp_tlu, sppp_null, sppp_tls, 501 sppp_tlf, sppp_ipv6cp_scr, sppp_screply, 502 sppp_ipv6cp_confreq, sppp_ipv6cp_confrej, sppp_ipv6cp_confnak, 503 }; 504 505 static const struct cp pap = { 506 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 507 sppp_up_event, sppp_down_event, sppp_open_event, 508 sppp_close_event, sppp_to_event, 509 sppp_pap_tlu, sppp_null, sppp_tls, sppp_tlf, 510 sppp_pap_scr, sppp_auth_screply, 511 NULL, NULL, NULL 512 }; 513 514 static const struct cp chap = { 515 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 516 sppp_up_event, sppp_down_event, sppp_chap_open, 517 sppp_close_event, sppp_auth_to_event, 518 sppp_chap_tlu, sppp_null, sppp_tls, sppp_tlf, 519 sppp_chap_scr, sppp_auth_screply, 520 NULL, NULL, NULL 521 }; 522 523 static const struct cp *cps[IDX_COUNT] = { 524 &lcp, /* IDX_LCP */ 525 &ipcp, /* IDX_IPCP */ 526 &ipv6cp, /* IDX_IPV6CP */ 527 &pap, /* IDX_PAP */ 528 &chap, /* IDX_CHAP */ 529 }; 530 531 static void 532 sppp_change_phase(struct sppp *sp, int phase) 533 { 534 STDDCL; 535 536 KASSERT(SPPP_WLOCKED(sp)); 537 538 if (sp->pp_phase == phase) 539 return; 540 541 sp->pp_phase = phase; 542 543 if (phase == SPPP_PHASE_NETWORK) 544 if_link_state_change(ifp, LINK_STATE_UP); 545 else 546 if_link_state_change(ifp, LINK_STATE_DOWN); 547 548 if (debug) 549 { 550 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 551 sppp_phase_name(sp->pp_phase)); 552 } 553 } 554 555 /* 556 * Exported functions, comprising our interface to the lower layer. 557 */ 558 559 /* 560 * Process the received packet. 561 */ 562 void 563 sppp_input(struct ifnet *ifp, struct mbuf *m) 564 { 565 struct ppp_header *h = NULL; 566 pktqueue_t *pktq = NULL; 567 struct ifqueue *inq = NULL; 568 uint16_t protocol; 569 struct sppp *sp = (struct sppp *)ifp; 570 int debug = ifp->if_flags & IFF_DEBUG; 571 int isr = 0; 572 573 SPPP_LOCK(sp, RW_READER); 574 575 if (ifp->if_flags & IFF_UP) { 576 /* Count received bytes, add hardware framing */ 577 if_statadd(ifp, if_ibytes, m->m_pkthdr.len + sp->pp_framebytes); 578 /* Note time of last receive */ 579 sp->pp_last_receive = time_uptime; 580 } 581 582 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 583 /* Too small packet, drop it. */ 584 if (debug) 585 log(LOG_DEBUG, 586 "%s: input packet is too small, %d bytes\n", 587 ifp->if_xname, m->m_pkthdr.len); 588 goto drop; 589 } 590 591 if (sp->pp_flags & PP_NOFRAMING) { 592 memcpy(&protocol, mtod(m, void *), 2); 593 protocol = ntohs(protocol); 594 m_adj(m, 2); 595 } else { 596 597 /* Get PPP header. */ 598 h = mtod(m, struct ppp_header *); 599 m_adj(m, PPP_HEADER_LEN); 600 601 switch (h->address) { 602 case PPP_ALLSTATIONS: 603 if (h->control != PPP_UI) 604 goto invalid; 605 if (sp->pp_flags & PP_CISCO) { 606 if (debug) 607 log(LOG_DEBUG, 608 "%s: PPP packet in Cisco mode " 609 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 610 ifp->if_xname, 611 h->address, h->control, ntohs(h->protocol)); 612 goto drop; 613 } 614 break; 615 case CISCO_MULTICAST: 616 case CISCO_UNICAST: 617 /* Don't check the control field here (RFC 1547). */ 618 if (! (sp->pp_flags & PP_CISCO)) { 619 if (debug) 620 log(LOG_DEBUG, 621 "%s: Cisco packet in PPP mode " 622 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 623 ifp->if_xname, 624 h->address, h->control, ntohs(h->protocol)); 625 goto drop; 626 } 627 switch (ntohs(h->protocol)) { 628 default: 629 if_statinc(ifp, if_noproto); 630 goto invalid; 631 case CISCO_KEEPALIVE: 632 SPPP_UNLOCK(sp); 633 sppp_cisco_input((struct sppp *) ifp, m); 634 m_freem(m); 635 return; 636 #ifdef INET 637 case ETHERTYPE_IP: 638 pktq = ip_pktq; 639 break; 640 #endif 641 #ifdef INET6 642 case ETHERTYPE_IPV6: 643 pktq = ip6_pktq; 644 break; 645 #endif 646 } 647 goto queue_pkt; 648 default: /* Invalid PPP packet. */ 649 invalid: 650 if (debug) 651 log(LOG_DEBUG, 652 "%s: invalid input packet " 653 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 654 ifp->if_xname, 655 h->address, h->control, ntohs(h->protocol)); 656 goto drop; 657 } 658 protocol = ntohs(h->protocol); 659 } 660 661 switch (protocol) { 662 reject_protocol: 663 if (sp->scp[IDX_LCP].state == STATE_OPENED) { 664 uint16_t prot = htons(protocol); 665 666 SPPP_UPGRADE(sp); 667 sppp_cp_send(sp, PPP_LCP, PROTO_REJ, 668 ++sp->scp[IDX_LCP].seq, m->m_pkthdr.len + 2, 669 &prot); 670 SPPP_DOWNGRADE(sp); 671 } 672 if (debug) 673 log(LOG_DEBUG, 674 "%s: invalid input protocol " 675 "<proto=0x%x>\n", ifp->if_xname, ntohs(protocol)); 676 if_statinc(ifp, if_noproto); 677 goto drop; 678 default: 679 goto reject_protocol; 680 case PPP_LCP: 681 SPPP_UNLOCK(sp); 682 sppp_cp_input(&lcp, sp, m); 683 /* already 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 if (!ISSET(sp->pp_ncpflags, SPPP_NCP_IPCP)) 702 goto reject_protocol; 703 SPPP_UNLOCK(sp); 704 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 705 sppp_cp_input(&ipcp, sp, m); 706 /* already m_freem(m) */ 707 } else { 708 m_freem(m); 709 } 710 return; 711 case PPP_IP: 712 if (sp->scp[IDX_IPCP].state == STATE_OPENED) { 713 sp->pp_last_activity = time_uptime; 714 pktq = ip_pktq; 715 } 716 break; 717 #endif 718 #ifdef INET6 719 case PPP_IPV6CP: 720 if (!ISSET(sp->pp_ncpflags, SPPP_NCP_IPV6CP)) 721 goto reject_protocol; 722 SPPP_UNLOCK(sp); 723 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 724 sppp_cp_input(&ipv6cp, sp, m); 725 /* already m_freem(m) */ 726 } else { 727 m_freem(m); 728 } 729 return; 730 731 case PPP_IPV6: 732 if (sp->scp[IDX_IPV6CP].state == STATE_OPENED) { 733 sp->pp_last_activity = time_uptime; 734 pktq = ip6_pktq; 735 } 736 break; 737 #endif 738 } 739 740 queue_pkt: 741 if ((ifp->if_flags & IFF_UP) == 0 || (!inq && !pktq)) { 742 goto drop; 743 } 744 745 /* Check queue. */ 746 if (__predict_true(pktq)) { 747 if (__predict_false(!pktq_enqueue(pktq, m, 0))) { 748 goto drop; 749 } 750 SPPP_UNLOCK(sp); 751 return; 752 } 753 754 SPPP_UNLOCK(sp); 755 756 IFQ_LOCK(inq); 757 if (IF_QFULL(inq)) { 758 /* Queue overflow. */ 759 IF_DROP(inq); 760 IFQ_UNLOCK(inq); 761 if (debug) 762 log(LOG_DEBUG, "%s: protocol queue overflow\n", 763 ifp->if_xname); 764 765 SPPP_LOCK(sp, RW_READER); 766 goto drop; 767 } 768 IF_ENQUEUE(inq, m); 769 IFQ_UNLOCK(inq); 770 schednetisr(isr); 771 return; 772 773 drop: 774 if_statadd2(ifp, if_ierrors, 1, if_iqdrops, 1); 775 m_freem(m); 776 SPPP_UNLOCK(sp); 777 return; 778 } 779 780 /* 781 * Enqueue transmit packet. 782 */ 783 static int 784 sppp_output(struct ifnet *ifp, struct mbuf *m, 785 const struct sockaddr *dst, const struct rtentry *rt) 786 { 787 struct sppp *sp = (struct sppp *) ifp; 788 struct ppp_header *h = NULL; 789 #ifndef SPPPSUBR_MPSAFE 790 struct ifqueue *ifq = NULL; /* XXX */ 791 #endif 792 int s, error = 0; 793 uint16_t protocol; 794 size_t pktlen; 795 796 s = splnet(); 797 SPPP_LOCK(sp, RW_READER); 798 799 sp->pp_last_activity = time_uptime; 800 801 if ((ifp->if_flags & IFF_UP) == 0 || 802 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 803 SPPP_UNLOCK(sp); 804 splx(s); 805 806 m_freem(m); 807 808 return (ENETDOWN); 809 } 810 811 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 812 /* 813 * Interface is not yet running, but auto-dial. Need 814 * to start LCP for it. 815 */ 816 ifp->if_flags |= IFF_RUNNING; 817 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 818 } 819 820 /* 821 * If the queueing discipline needs packet classification, 822 * do it before prepending link headers. 823 */ 824 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family); 825 826 #ifdef INET 827 if (dst->sa_family == AF_INET) { 828 struct ip *ip = NULL; 829 #ifndef SPPPSUBR_MPSAFE 830 struct tcphdr *th = NULL; 831 #endif 832 833 if (m->m_len >= sizeof(struct ip)) { 834 ip = mtod(m, struct ip *); 835 #ifndef SPPPSUBR_MPSAFE 836 if (ip->ip_p == IPPROTO_TCP && 837 m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) + 838 sizeof(struct tcphdr)) { 839 th = (struct tcphdr *) 840 ((char *)ip + (ip->ip_hl << 2)); 841 } 842 #endif 843 } else 844 ip = NULL; 845 846 /* 847 * When using dynamic local IP address assignment by using 848 * 0.0.0.0 as a local address, the first TCP session will 849 * not connect because the local TCP checksum is computed 850 * using 0.0.0.0 which will later become our real IP address 851 * so the TCP checksum computed at the remote end will 852 * become invalid. So we 853 * - don't let packets with src ip addr 0 thru 854 * - we flag TCP packets with src ip 0 as an error 855 */ 856 if (ip && ip->ip_src.s_addr == INADDR_ANY) { 857 uint8_t proto = ip->ip_p; 858 859 SPPP_UNLOCK(sp); 860 splx(s); 861 862 m_freem(m); 863 if (proto == IPPROTO_TCP) 864 return (EADDRNOTAVAIL); 865 else 866 return (0); 867 } 868 869 #ifndef SPPPSUBR_MPSAFE 870 /* 871 * Put low delay, telnet, rlogin and ftp control packets 872 * in front of the queue. 873 */ 874 if (!IF_QFULL(&sp->pp_fastq) && 875 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || 876 (th && (INTERACTIVE(ntohs(th->th_sport)) || 877 INTERACTIVE(ntohs(th->th_dport)))))) 878 ifq = &sp->pp_fastq; 879 #endif /* !SPPPSUBR_MPSAFE */ 880 } 881 #endif 882 883 #ifdef INET6 884 if (dst->sa_family == AF_INET6) { 885 /* XXX do something tricky here? */ 886 } 887 #endif 888 889 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 890 /* 891 * Prepend general data packet PPP header. For now, IP only. 892 */ 893 M_PREPEND(m, PPP_HEADER_LEN, M_DONTWAIT); 894 if (! m) { 895 if (ifp->if_flags & IFF_DEBUG) 896 log(LOG_DEBUG, "%s: no memory for transmit header\n", 897 ifp->if_xname); 898 if_statinc(ifp, if_oerrors); 899 SPPP_UNLOCK(sp); 900 splx(s); 901 return (ENOBUFS); 902 } 903 /* 904 * May want to check size of packet 905 * (albeit due to the implementation it's always enough) 906 */ 907 h = mtod(m, struct ppp_header *); 908 if (sp->pp_flags & PP_CISCO) { 909 h->address = CISCO_UNICAST; /* unicast address */ 910 h->control = 0; 911 } else { 912 h->address = PPP_ALLSTATIONS; /* broadcast address */ 913 h->control = PPP_UI; /* Unnumbered Info */ 914 } 915 } 916 917 switch (dst->sa_family) { 918 #ifdef INET 919 case AF_INET: /* Internet Protocol */ 920 if (sp->pp_flags & PP_CISCO) 921 protocol = htons(ETHERTYPE_IP); 922 else { 923 /* 924 * Don't choke with an ENETDOWN early. It's 925 * possible that we just started dialing out, 926 * so don't drop the packet immediately. If 927 * we notice that we run out of buffer space 928 * below, we will however remember that we are 929 * not ready to carry IP packets, and return 930 * ENETDOWN, as opposed to ENOBUFS. 931 */ 932 protocol = htons(PPP_IP); 933 if (sp->scp[IDX_IPCP].state != STATE_OPENED) 934 error = ENETDOWN; 935 } 936 break; 937 #endif 938 #ifdef INET6 939 case AF_INET6: /* Internet Protocol version 6 */ 940 if (sp->pp_flags & PP_CISCO) 941 protocol = htons(ETHERTYPE_IPV6); 942 else { 943 /* 944 * Don't choke with an ENETDOWN early. It's 945 * possible that we just started dialing out, 946 * so don't drop the packet immediately. If 947 * we notice that we run out of buffer space 948 * below, we will however remember that we are 949 * not ready to carry IP packets, and return 950 * ENETDOWN, as opposed to ENOBUFS. 951 */ 952 protocol = htons(PPP_IPV6); 953 if (sp->scp[IDX_IPV6CP].state != STATE_OPENED) 954 error = ENETDOWN; 955 } 956 break; 957 #endif 958 default: 959 m_freem(m); 960 if_statinc(ifp, if_oerrors); 961 SPPP_UNLOCK(sp); 962 splx(s); 963 return (EAFNOSUPPORT); 964 } 965 966 if (sp->pp_flags & PP_NOFRAMING) { 967 M_PREPEND(m, 2, M_DONTWAIT); 968 if (m == NULL) { 969 if (ifp->if_flags & IFF_DEBUG) 970 log(LOG_DEBUG, "%s: no memory for transmit header\n", 971 ifp->if_xname); 972 if_statinc(ifp, if_oerrors); 973 SPPP_UNLOCK(sp); 974 splx(s); 975 return (ENOBUFS); 976 } 977 *mtod(m, uint16_t *) = protocol; 978 } else { 979 h->protocol = protocol; 980 } 981 982 pktlen = m->m_pkthdr.len; 983 #ifdef SPPPSUBR_MPSAFE 984 SPPP_UNLOCK(sp); 985 error = if_transmit_lock(ifp, m); 986 SPPP_LOCK(sp, RW_READER); 987 if (error == 0) 988 if_statadd(ifp, if_obytes, pktlen + sp->pp_framebytes); 989 #else /* !SPPPSUBR_MPSAFE */ 990 error = ifq_enqueue2(ifp, ifq, m); 991 992 if (error == 0) { 993 /* 994 * Count output packets and bytes. 995 * The packet length includes header + additional hardware 996 * framing according to RFC 1333. 997 */ 998 if (!(ifp->if_flags & IFF_OACTIVE)) { 999 SPPP_UNLOCK(sp); 1000 if_start_lock(ifp); 1001 SPPP_LOCK(sp, RW_READER); 1002 } 1003 if_statadd(ifp, if_obytes, pktlen + sp->pp_framebytes); 1004 } 1005 #endif /* !SPPPSUBR_MPSAFE */ 1006 SPPP_UNLOCK(sp); 1007 splx(s); 1008 return error; 1009 } 1010 1011 void 1012 sppp_attach(struct ifnet *ifp) 1013 { 1014 struct sppp *sp = (struct sppp *) ifp; 1015 char xnamebuf[MAXCOMLEN]; 1016 1017 /* Initialize keepalive handler. */ 1018 if (! spppq) { 1019 callout_init(&keepalive_ch, CALLOUT_MPSAFE); 1020 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 1021 } 1022 1023 if (! spppq_lock) 1024 spppq_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_SOFTNET); 1025 1026 sp->pp_if.if_type = IFT_PPP; 1027 sp->pp_if.if_output = sppp_output; 1028 sp->pp_fastq.ifq_maxlen = 32; 1029 sp->pp_cpq.ifq_maxlen = 20; 1030 sp->pp_loopcnt = 0; 1031 sp->pp_alivecnt = 0; 1032 sp->pp_last_activity = 0; 1033 sp->pp_last_receive = 0; 1034 sp->pp_maxalive = DEFAULT_MAXALIVECNT; 1035 sp->pp_max_noreceive = DEFAULT_NORECV_TIME; 1036 sp->pp_idle_timeout = 0; 1037 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 1038 sp->pp_phase = SPPP_PHASE_DEAD; 1039 sp->pp_up = sppp_notify_up; 1040 sp->pp_down = sppp_notify_down; 1041 sp->pp_ncpflags = SPPP_NCP_IPCP | SPPP_NCP_IPV6CP; 1042 sppp_wq_set(&sp->work_ifdown, sppp_ifdown, NULL); 1043 memset(sp->scp, 0, sizeof(sp->scp)); 1044 rw_init(&sp->pp_lock); 1045 1046 if_alloc_sadl(ifp); 1047 1048 /* Lets not beat about the bush, we know we're down. */ 1049 ifp->if_link_state = LINK_STATE_DOWN; 1050 1051 snprintf(xnamebuf, sizeof(xnamebuf), "%s.wq_cp", ifp->if_xname); 1052 sp->wq_cp = sppp_wq_create(sp, xnamebuf, 1053 PRI_SOFTNET, IPL_SOFTNET, WQ_MPSAFE); 1054 1055 memset(&sp->myauth, 0, sizeof sp->myauth); 1056 memset(&sp->hisauth, 0, sizeof sp->hisauth); 1057 SPPP_LOCK(sp, RW_WRITER); 1058 sppp_lcp_init(sp); 1059 sppp_ipcp_init(sp); 1060 sppp_ipv6cp_init(sp); 1061 sppp_pap_init(sp); 1062 sppp_chap_init(sp); 1063 SPPP_UNLOCK(sp); 1064 1065 SPPPQ_LOCK(); 1066 /* Insert new entry into the keepalive list. */ 1067 sp->pp_next = spppq; 1068 spppq = sp; 1069 SPPPQ_UNLOCK(); 1070 } 1071 1072 void 1073 sppp_detach(struct ifnet *ifp) 1074 { 1075 struct sppp **q, *p, *sp = (struct sppp *) ifp; 1076 1077 /* Remove the entry from the keepalive list. */ 1078 SPPPQ_LOCK(); 1079 for (q = &spppq; (p = *q); q = &p->pp_next) 1080 if (p == sp) { 1081 *q = p->pp_next; 1082 break; 1083 } 1084 SPPPQ_UNLOCK(); 1085 1086 if (! spppq) { 1087 /* Stop keepalive handler. */ 1088 callout_stop(&keepalive_ch); 1089 mutex_obj_free(spppq_lock); 1090 spppq_lock = NULL; 1091 } 1092 1093 sppp_cp_fini(&lcp, sp); 1094 sppp_cp_fini(&ipcp, sp); 1095 sppp_cp_fini(&pap, sp); 1096 sppp_cp_fini(&chap, sp); 1097 #ifdef INET6 1098 sppp_cp_fini(&ipv6cp, sp); 1099 #endif 1100 sppp_wq_destroy(sp, sp->wq_cp); 1101 1102 /* free authentication info */ 1103 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 1104 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 1105 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 1106 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 1107 rw_destroy(&sp->pp_lock); 1108 } 1109 1110 /* 1111 * Flush the interface output queue. 1112 */ 1113 void 1114 sppp_flush(struct ifnet *ifp) 1115 { 1116 struct sppp *sp = (struct sppp *) ifp; 1117 1118 SPPP_LOCK(sp, RW_WRITER); 1119 IFQ_PURGE(&sp->pp_if.if_snd); 1120 IF_PURGE(&sp->pp_fastq); 1121 IF_PURGE(&sp->pp_cpq); 1122 SPPP_UNLOCK(sp); 1123 } 1124 1125 /* 1126 * Check if the output queue is empty. 1127 */ 1128 int 1129 sppp_isempty(struct ifnet *ifp) 1130 { 1131 struct sppp *sp = (struct sppp *) ifp; 1132 int empty, s; 1133 1134 s = splnet(); 1135 SPPP_LOCK(sp, RW_READER); 1136 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1137 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1138 SPPP_UNLOCK(sp); 1139 splx(s); 1140 return (empty); 1141 } 1142 1143 /* 1144 * Get next packet to send. 1145 */ 1146 struct mbuf * 1147 sppp_dequeue(struct ifnet *ifp) 1148 { 1149 struct sppp *sp = (struct sppp *) ifp; 1150 struct mbuf *m; 1151 int s; 1152 1153 s = splnet(); 1154 SPPP_LOCK(sp, RW_WRITER); 1155 /* 1156 * Process only the control protocol queue until we have at 1157 * least one NCP open. 1158 * 1159 * Do always serve all three queues in Cisco mode. 1160 */ 1161 IF_DEQUEUE(&sp->pp_cpq, m); 1162 if (m == NULL && 1163 (sppp_cp_check(sp, CP_NCP) || (sp->pp_flags & PP_CISCO) != 0)) { 1164 IF_DEQUEUE(&sp->pp_fastq, m); 1165 if (m == NULL) 1166 IFQ_DEQUEUE(&sp->pp_if.if_snd, m); 1167 } 1168 SPPP_UNLOCK(sp); 1169 splx(s); 1170 return m; 1171 } 1172 1173 /* 1174 * Process an ioctl request. Called on low priority level. 1175 */ 1176 int 1177 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1178 { 1179 struct lwp *l = curlwp; /* XXX */ 1180 struct ifreq *ifr = (struct ifreq *) data; 1181 struct ifaddr *ifa = (struct ifaddr *) data; 1182 struct sppp *sp = (struct sppp *) ifp; 1183 int s, error=0, going_up, going_down; 1184 u_short newmode; 1185 u_long lcp_mru; 1186 1187 s = splnet(); 1188 switch (cmd) { 1189 case SIOCINITIFADDR: 1190 ifa->ifa_rtrequest = p2p_rtrequest; 1191 break; 1192 1193 case SIOCSIFFLAGS: 1194 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1195 break; 1196 1197 SPPP_LOCK(sp, RW_WRITER); 1198 going_up = ifp->if_flags & IFF_UP && 1199 (ifp->if_flags & IFF_RUNNING) == 0; 1200 going_down = (ifp->if_flags & IFF_UP) == 0 && 1201 ifp->if_flags & IFF_RUNNING; 1202 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1203 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1204 /* sanity */ 1205 newmode = IFF_PASSIVE; 1206 ifp->if_flags &= ~IFF_AUTO; 1207 } 1208 1209 if (going_up || going_down) { 1210 sp->lcp.reestablish = false; 1211 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 1212 } 1213 if (going_up && newmode == 0) { 1214 /* neither auto-dial nor passive */ 1215 ifp->if_flags |= IFF_RUNNING; 1216 if (!(sp->pp_flags & PP_CISCO)) { 1217 sppp_wq_add(sp->wq_cp, 1218 &sp->scp[IDX_LCP].work_open); 1219 } 1220 } else if (going_down) { 1221 SPPP_UNLOCK(sp); 1222 sppp_flush(ifp); 1223 SPPP_LOCK(sp, RW_WRITER); 1224 1225 ifp->if_flags &= ~IFF_RUNNING; 1226 } 1227 SPPP_UNLOCK(sp); 1228 break; 1229 1230 case SIOCSIFMTU: 1231 if (ifr->ifr_mtu < PPP_MINMRU || 1232 ifr->ifr_mtu > PP_MTU) { 1233 error = EINVAL; 1234 break; 1235 } 1236 1237 error = ifioctl_common(ifp, cmd, data); 1238 if (error == ENETRESET) 1239 error = 0; 1240 1241 SPPP_LOCK(sp, RW_WRITER); 1242 lcp_mru = sp->lcp.mru; 1243 if (ifp->if_mtu < PP_MTU) { 1244 sp->lcp.mru = ifp->if_mtu; 1245 } else { 1246 sp->lcp.mru = PP_MTU; 1247 } 1248 if (lcp_mru != sp->lcp.mru) 1249 SET(sp->lcp.opts, SPPP_LCP_OPT_MRU); 1250 1251 if (sp->scp[IDX_LCP].state == STATE_OPENED && 1252 ifp->if_mtu > sp->lcp.their_mru) { 1253 sp->pp_saved_mtu = ifp->if_mtu; 1254 ifp->if_mtu = sp->lcp.their_mru; 1255 1256 if (ifp->if_flags & IFF_DEBUG) { 1257 log(LOG_DEBUG, 1258 "%s: setting MTU " 1259 "from %"PRIu64" bytes " 1260 "to %"PRIu64" bytes\n", 1261 ifp->if_xname, sp->pp_saved_mtu, 1262 ifp->if_mtu); 1263 } 1264 } 1265 SPPP_UNLOCK(sp); 1266 break; 1267 1268 case SIOCGIFMTU: 1269 if ((error = ifioctl_common(ifp, cmd, data)) == ENETRESET) 1270 error = 0; 1271 break; 1272 case SIOCADDMULTI: 1273 case SIOCDELMULTI: 1274 break; 1275 1276 case SPPPSETAUTHCFG: 1277 case SPPPSETLCPCFG: 1278 case SPPPSETNCPCFG: 1279 case SPPPSETIDLETO: 1280 case SPPPSETAUTHFAILURE: 1281 case SPPPSETDNSOPTS: 1282 case SPPPSETKEEPALIVE: 1283 #if defined(COMPAT_50) || defined(MODULAR) 1284 case __SPPPSETIDLETO50: 1285 case __SPPPSETKEEPALIVE50: 1286 #endif /* COMPAT_50 || MODULAR */ 1287 error = kauth_authorize_network(l->l_cred, 1288 KAUTH_NETWORK_INTERFACE, 1289 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd, 1290 NULL); 1291 if (error) 1292 break; 1293 error = sppp_params(sp, cmd, data); 1294 break; 1295 1296 case SPPPGETAUTHCFG: 1297 case SPPPGETLCPCFG: 1298 case SPPPGETNCPCFG: 1299 case SPPPGETAUTHFAILURES: 1300 error = kauth_authorize_network(l->l_cred, 1301 KAUTH_NETWORK_INTERFACE, 1302 KAUTH_REQ_NETWORK_INTERFACE_GETPRIV, ifp, (void *)cmd, 1303 NULL); 1304 if (error) 1305 break; 1306 error = sppp_params(sp, cmd, data); 1307 break; 1308 1309 case SPPPGETSTATUS: 1310 case SPPPGETSTATUSNCP: 1311 case SPPPGETIDLETO: 1312 case SPPPGETDNSOPTS: 1313 case SPPPGETDNSADDRS: 1314 case SPPPGETKEEPALIVE: 1315 #if defined(COMPAT_50) || defined(MODULAR) 1316 case __SPPPGETIDLETO50: 1317 case __SPPPGETKEEPALIVE50: 1318 #endif /* COMPAT_50 || MODULAR */ 1319 case SPPPGETLCPSTATUS: 1320 case SPPPGETIPCPSTATUS: 1321 case SPPPGETIPV6CPSTATUS: 1322 error = sppp_params(sp, cmd, data); 1323 break; 1324 1325 default: 1326 error = ifioctl_common(ifp, cmd, data); 1327 break; 1328 } 1329 splx(s); 1330 return (error); 1331 } 1332 1333 /* 1334 * Cisco framing implementation. 1335 */ 1336 1337 /* 1338 * Handle incoming Cisco keepalive protocol packets. 1339 */ 1340 static void 1341 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1342 { 1343 STDDCL; 1344 struct cisco_packet *h; 1345 #ifdef INET 1346 uint32_t me, mymask = 0; /* XXX: GCC */ 1347 #endif 1348 1349 SPPP_LOCK(sp, RW_WRITER); 1350 1351 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1352 if (debug) 1353 log(LOG_DEBUG, 1354 "%s: cisco invalid packet length: %d bytes\n", 1355 ifp->if_xname, m->m_pkthdr.len); 1356 SPPP_UNLOCK(sp); 1357 return; 1358 } 1359 h = mtod(m, struct cisco_packet *); 1360 if (debug) 1361 log(LOG_DEBUG, 1362 "%s: cisco input: %d bytes " 1363 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1364 ifp->if_xname, m->m_pkthdr.len, 1365 ntohl(h->type), h->par1, h->par2, (u_int)h->rel, 1366 (u_int)h->time0, (u_int)h->time1); 1367 switch (ntohl(h->type)) { 1368 default: 1369 if (debug) 1370 addlog("%s: cisco unknown packet type: 0x%x\n", 1371 ifp->if_xname, ntohl(h->type)); 1372 break; 1373 case CISCO_ADDR_REPLY: 1374 /* Reply on address request, ignore */ 1375 break; 1376 case CISCO_KEEPALIVE_REQ: 1377 sp->pp_alivecnt = 0; 1378 sp->scp[IDX_LCP].rseq = ntohl(h->par1); 1379 if (sp->scp[IDX_LCP].seq == sp->scp[IDX_LCP].rseq) { 1380 /* Local and remote sequence numbers are equal. 1381 * Probably, the line is in loopback mode. */ 1382 if (sp->pp_loopcnt >= LOOPALIVECNT) { 1383 printf ("%s: loopback\n", 1384 ifp->if_xname); 1385 sp->pp_loopcnt = 0; 1386 if (ifp->if_flags & IFF_UP) { 1387 SPPP_UNLOCK(sp); 1388 if_down(ifp); 1389 SPPP_LOCK(sp, RW_WRITER); 1390 1391 IF_PURGE(&sp->pp_cpq); 1392 } 1393 } 1394 ++sp->pp_loopcnt; 1395 1396 /* Generate new local sequence number */ 1397 sp->scp[IDX_LCP].seq = cprng_fast32(); 1398 break; 1399 } 1400 sp->pp_loopcnt = 0; 1401 if (! (ifp->if_flags & IFF_UP) && 1402 (ifp->if_flags & IFF_RUNNING)) { 1403 SPPP_UNLOCK(sp); 1404 if_up(ifp); 1405 SPPP_LOCK(sp, RW_WRITER); 1406 } 1407 break; 1408 case CISCO_ADDR_REQ: 1409 #ifdef INET 1410 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1411 if (me != 0L) 1412 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1413 #endif 1414 break; 1415 } 1416 SPPP_UNLOCK(sp); 1417 } 1418 1419 /* 1420 * Send Cisco keepalive packet. 1421 */ 1422 static void 1423 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1424 { 1425 STDDCL; 1426 struct ppp_header *h; 1427 struct cisco_packet *ch; 1428 struct mbuf *m; 1429 uint32_t t; 1430 1431 KASSERT(SPPP_WLOCKED(sp)); 1432 1433 t = time_uptime * 1000; 1434 MGETHDR(m, M_DONTWAIT, MT_DATA); 1435 if (! m) 1436 return; 1437 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1438 m_reset_rcvif(m); 1439 1440 h = mtod(m, struct ppp_header *); 1441 h->address = CISCO_MULTICAST; 1442 h->control = 0; 1443 h->protocol = htons(CISCO_KEEPALIVE); 1444 1445 ch = (struct cisco_packet *)(h + 1); 1446 ch->type = htonl(type); 1447 ch->par1 = htonl(par1); 1448 ch->par2 = htonl(par2); 1449 ch->rel = -1; 1450 1451 ch->time0 = htons((u_short)(t >> 16)); 1452 ch->time1 = htons((u_short) t); 1453 1454 if (debug) 1455 log(LOG_DEBUG, 1456 "%s: cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1457 ifp->if_xname, ntohl(ch->type), ch->par1, 1458 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1459 (u_int)ch->time1); 1460 1461 if (IF_QFULL(&sp->pp_cpq)) { 1462 IF_DROP(&sp->pp_fastq); 1463 IF_DROP(&ifp->if_snd); 1464 m_freem(m); 1465 if_statinc(ifp, if_oerrors); 1466 return; 1467 } 1468 1469 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 1470 IF_ENQUEUE(&sp->pp_cpq, m); 1471 1472 if (! (ifp->if_flags & IFF_OACTIVE)) { 1473 SPPP_UNLOCK(sp); 1474 if_start_lock(ifp); 1475 SPPP_LOCK(sp, RW_WRITER); 1476 } 1477 } 1478 1479 /* 1480 * PPP protocol implementation. 1481 */ 1482 1483 /* 1484 * Send PPP control protocol packet. 1485 */ 1486 static void 1487 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1488 u_char ident, u_short len, void *data) 1489 { 1490 STDDCL; 1491 struct lcp_header *lh; 1492 struct mbuf *m; 1493 size_t pkthdrlen; 1494 1495 KASSERT(SPPP_WLOCKED(sp)); 1496 1497 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1498 1499 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1500 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1501 MGETHDR(m, M_DONTWAIT, MT_DATA); 1502 if (! m) { 1503 return; 1504 } 1505 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1506 m_reset_rcvif(m); 1507 1508 if (sp->pp_flags & PP_NOFRAMING) { 1509 *mtod(m, uint16_t *) = htons(proto); 1510 lh = (struct lcp_header *)(mtod(m, uint8_t *) + 2); 1511 } else { 1512 struct ppp_header *h; 1513 h = mtod(m, struct ppp_header *); 1514 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1515 h->control = PPP_UI; /* Unnumbered Info */ 1516 h->protocol = htons(proto); /* Link Control Protocol */ 1517 lh = (struct lcp_header *)(h + 1); 1518 } 1519 lh->type = type; 1520 lh->ident = ident; 1521 lh->len = htons(LCP_HEADER_LEN + len); 1522 if (len) 1523 memcpy(lh + 1, data, len); 1524 1525 if (debug) { 1526 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 1527 ifp->if_xname, 1528 sppp_proto_name(proto), 1529 sppp_cp_type_name(lh->type), lh->ident, ntohs(lh->len)); 1530 if (len) 1531 sppp_print_bytes((u_char *)(lh + 1), len); 1532 addlog(">\n"); 1533 } 1534 if (IF_QFULL(&sp->pp_cpq)) { 1535 IF_DROP(&sp->pp_fastq); 1536 IF_DROP(&ifp->if_snd); 1537 m_freem(m); 1538 if_statinc(ifp, if_oerrors); 1539 return; 1540 } 1541 1542 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 1543 IF_ENQUEUE(&sp->pp_cpq, m); 1544 1545 if (! (ifp->if_flags & IFF_OACTIVE)) { 1546 SPPP_UNLOCK(sp); 1547 if_start_lock(ifp); 1548 SPPP_LOCK(sp, RW_WRITER); 1549 } 1550 } 1551 1552 static void 1553 sppp_cp_to_lcp(void *xsp) 1554 { 1555 struct sppp *sp = xsp; 1556 1557 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_to); 1558 } 1559 1560 static void 1561 sppp_cp_to_ipcp(void *xsp) 1562 { 1563 struct sppp *sp = xsp; 1564 1565 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_IPCP].work_to); 1566 } 1567 1568 static void 1569 sppp_cp_to_ipv6cp(void *xsp) 1570 { 1571 struct sppp *sp = xsp; 1572 1573 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_IPV6CP].work_to); 1574 } 1575 1576 static void 1577 sppp_cp_to_pap(void *xsp) 1578 { 1579 struct sppp *sp = xsp; 1580 1581 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_to); 1582 } 1583 1584 static void 1585 sppp_cp_to_chap(void *xsp) 1586 { 1587 struct sppp *sp = xsp; 1588 1589 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_to); 1590 } 1591 1592 static void 1593 sppp_cp_init(const struct cp *cp, struct sppp *sp) 1594 { 1595 struct sppp_cp *scp; 1596 typedef void (*sppp_co_cb_t)(void *); 1597 static const sppp_co_cb_t to_cb[IDX_COUNT] = { 1598 [IDX_LCP] = sppp_cp_to_lcp, 1599 [IDX_IPCP] = sppp_cp_to_ipcp, 1600 [IDX_IPV6CP] = sppp_cp_to_ipv6cp, 1601 [IDX_PAP] = sppp_cp_to_pap, 1602 [IDX_CHAP] = sppp_cp_to_chap, 1603 }; 1604 1605 scp = &sp->scp[cp->protoidx]; 1606 scp->state = STATE_INITIAL; 1607 scp->fail_counter = 0; 1608 scp->seq = 0; 1609 scp->rseq = 0; 1610 1611 SPPP_WQ_SET(&scp->work_up, cp->Up, cp); 1612 SPPP_WQ_SET(&scp->work_down, cp->Down, cp); 1613 SPPP_WQ_SET(&scp->work_open, cp->Open, cp); 1614 SPPP_WQ_SET(&scp->work_close, cp->Close, cp); 1615 SPPP_WQ_SET(&scp->work_to, cp->TO, cp); 1616 SPPP_WQ_SET(&scp->work_rcr, sppp_rcr_event, cp); 1617 SPPP_WQ_SET(&scp->work_rca, sppp_rca_event, cp); 1618 SPPP_WQ_SET(&scp->work_rcn, sppp_rcn_event, cp); 1619 SPPP_WQ_SET(&scp->work_rtr, sppp_rtr_event, cp); 1620 SPPP_WQ_SET(&scp->work_rta, sppp_rta_event, cp); 1621 SPPP_WQ_SET(&scp->work_rxj, sppp_rxj_event, cp); 1622 1623 callout_init(&scp->ch, CALLOUT_MPSAFE); 1624 callout_setfunc(&scp->ch, to_cb[cp->protoidx], sp); 1625 } 1626 1627 static void 1628 sppp_cp_fini(const struct cp *cp, struct sppp *sp) 1629 { 1630 struct sppp_cp *scp; 1631 scp = &sp->scp[cp->protoidx]; 1632 1633 sppp_wq_wait(sp->wq_cp, &scp->work_up); 1634 sppp_wq_wait(sp->wq_cp, &scp->work_down); 1635 sppp_wq_wait(sp->wq_cp, &scp->work_open); 1636 sppp_wq_wait(sp->wq_cp, &scp->work_close); 1637 sppp_wq_wait(sp->wq_cp, &scp->work_to); 1638 sppp_wq_wait(sp->wq_cp, &scp->work_rcr); 1639 sppp_wq_wait(sp->wq_cp, &scp->work_rca); 1640 sppp_wq_wait(sp->wq_cp, &scp->work_rcn); 1641 sppp_wq_wait(sp->wq_cp, &scp->work_rtr); 1642 sppp_wq_wait(sp->wq_cp, &scp->work_rta); 1643 sppp_wq_wait(sp->wq_cp, &scp->work_rxj); 1644 1645 callout_halt(&scp->ch, NULL); 1646 callout_destroy(&scp->ch); 1647 1648 if (scp->mbuf_confreq != NULL) { 1649 m_freem(scp->mbuf_confreq); 1650 scp->mbuf_confreq = NULL; 1651 } 1652 if (scp->mbuf_confnak != NULL) { 1653 m_freem(scp->mbuf_confnak); 1654 scp->mbuf_confnak = NULL; 1655 } 1656 } 1657 1658 /* 1659 * Handle incoming PPP control protocol packets. 1660 */ 1661 static void 1662 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1663 { 1664 STDDCL; 1665 struct lcp_header *h; 1666 struct sppp_cp *scp; 1667 int printlen, len = m->m_pkthdr.len; 1668 u_char *p; 1669 uint32_t u32; 1670 1671 SPPP_LOCK(sp, RW_WRITER); 1672 1673 scp = &sp->scp[cp->protoidx]; 1674 1675 if (len < 4) { 1676 if (debug) 1677 log(LOG_DEBUG, 1678 "%s: %s invalid packet length: %d bytes\n", 1679 ifp->if_xname, cp->name, len); 1680 goto out; 1681 } 1682 h = mtod(m, struct lcp_header *); 1683 if (debug) { 1684 printlen = ntohs(h->len); 1685 log(LOG_DEBUG, 1686 "%s: %s input(%s): <%s id=0x%x len=%d", 1687 ifp->if_xname, cp->name, 1688 sppp_state_name(scp->state), 1689 sppp_cp_type_name(h->type), h->ident, printlen); 1690 if (len < printlen) 1691 printlen = len; 1692 if (printlen > 4) 1693 sppp_print_bytes((u_char *)(h + 1), printlen - 4); 1694 addlog(">\n"); 1695 } 1696 if (len > ntohs(h->len)) 1697 len = ntohs(h->len); 1698 p = (u_char *)(h + 1); 1699 switch (h->type) { 1700 case CONF_REQ: 1701 if (len < 4) { 1702 if (debug) 1703 addlog("%s: %s invalid conf-req length %d\n", 1704 ifp->if_xname, cp->name, 1705 len); 1706 if_statinc(ifp, if_ierrors); 1707 break; 1708 } 1709 1710 scp->rcr_type = CP_RCR_NONE; 1711 scp->rconfid = h->ident; 1712 if (scp->mbuf_confreq != NULL) { 1713 m_freem(scp->mbuf_confreq); 1714 } 1715 scp->mbuf_confreq = m; 1716 m = NULL; 1717 sppp_wq_add(sp->wq_cp, &scp->work_rcr); 1718 break; 1719 case CONF_ACK: 1720 if (h->ident != scp->confid) { 1721 if (debug) 1722 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1723 ifp->if_xname, cp->name, 1724 h->ident, scp->confid); 1725 if_statinc(ifp, if_ierrors); 1726 break; 1727 } 1728 sppp_wq_add(sp->wq_cp, &scp->work_rca); 1729 break; 1730 case CONF_NAK: 1731 case CONF_REJ: 1732 if (h->ident != scp->confid) { 1733 if (debug) 1734 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1735 ifp->if_xname, cp->name, 1736 h->ident, scp->confid); 1737 if_statinc(ifp, if_ierrors); 1738 break; 1739 } 1740 1741 if (scp->mbuf_confnak) { 1742 m_freem(scp->mbuf_confnak); 1743 } 1744 scp->mbuf_confnak = m; 1745 m = NULL; 1746 sppp_wq_add(sp->wq_cp, &scp->work_rcn); 1747 break; 1748 case TERM_REQ: 1749 scp->rseq = h->ident; 1750 sppp_wq_add(sp->wq_cp, &scp->work_rtr); 1751 break; 1752 case TERM_ACK: 1753 if (h->ident != scp->confid && 1754 h->ident != scp->seq) { 1755 if (debug) 1756 addlog("%s: %s id mismatch " 1757 "0x%x != 0x%x and 0x%x != %0lx\n", 1758 ifp->if_xname, cp->name, 1759 h->ident, scp->confid, 1760 h->ident, scp->seq); 1761 if_statinc(ifp, if_ierrors); 1762 break; 1763 } 1764 1765 sppp_wq_add(sp->wq_cp, &scp->work_rta); 1766 break; 1767 case CODE_REJ: 1768 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1769 log(LOG_INFO, 1770 "%s: %s: ignoring RXJ (%s) for code ?, " 1771 "danger will robinson\n", 1772 ifp->if_xname, cp->name, 1773 sppp_cp_type_name(h->type)); 1774 sppp_wq_add(sp->wq_cp, &scp->work_rxj); 1775 break; 1776 case PROTO_REJ: 1777 { 1778 int catastrophic; 1779 const struct cp *upper; 1780 int i; 1781 uint16_t proto; 1782 1783 catastrophic = 0; 1784 upper = NULL; 1785 proto = p[0] << 8 | p[1]; 1786 for (i = 0; i < IDX_COUNT; i++) { 1787 if (cps[i]->proto == proto) { 1788 upper = cps[i]; 1789 break; 1790 } 1791 } 1792 if (upper == NULL) 1793 catastrophic++; 1794 1795 if (debug) 1796 log(LOG_INFO, 1797 "%s: %s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1798 ifp->if_xname, cp->name, catastrophic ? '-' : '+', 1799 sppp_cp_type_name(h->type), proto, 1800 upper ? upper->name : "unknown", 1801 upper ? sppp_state_name(sp->scp[upper->protoidx].state) : "?"); 1802 1803 /* 1804 * if we got RXJ+ against conf-req, the peer does not implement 1805 * this particular protocol type. terminate the protocol. 1806 */ 1807 if (upper && !catastrophic) { 1808 if (sp->scp[upper->protoidx].state == STATE_REQ_SENT) { 1809 sppp_wq_add(sp->wq_cp, 1810 &sp->scp[upper->protoidx].work_close); 1811 break; 1812 } 1813 } 1814 sppp_wq_add(sp->wq_cp, &scp->work_rxj); 1815 break; 1816 } 1817 case DISC_REQ: 1818 if (cp->proto != PPP_LCP) 1819 goto illegal; 1820 /* Discard the packet. */ 1821 break; 1822 case ECHO_REQ: 1823 if (cp->proto != PPP_LCP) 1824 goto illegal; 1825 if (scp->state != STATE_OPENED) { 1826 if (debug) 1827 addlog("%s: lcp echo req but lcp closed\n", 1828 ifp->if_xname); 1829 if_statinc(ifp, if_ierrors); 1830 break; 1831 } 1832 if (len < 8) { 1833 if (debug) 1834 addlog("%s: invalid lcp echo request " 1835 "packet length: %d bytes\n", 1836 ifp->if_xname, len); 1837 break; 1838 } 1839 memcpy(&u32, h + 1, sizeof u32); 1840 if (ntohl(u32) == sp->lcp.magic) { 1841 /* Line loopback mode detected. */ 1842 printf("%s: loopback\n", ifp->if_xname); 1843 /* 1844 * There is no change for items of sp->scp[cp->protoidx] 1845 * while if_down() even without SPPP_LOCK 1846 */ 1847 SPPP_UNLOCK(sp); 1848 if_down(ifp); 1849 SPPP_LOCK(sp, RW_WRITER); 1850 1851 IF_PURGE(&sp->pp_cpq); 1852 1853 /* Shut down the PPP link. */ 1854 /* XXX */ 1855 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_down); 1856 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_up); 1857 break; 1858 } 1859 u32 = htonl(sp->lcp.magic); 1860 memcpy(h + 1, &u32, sizeof u32); 1861 if (debug) 1862 addlog("%s: got lcp echo req, sending echo rep\n", 1863 ifp->if_xname); 1864 sppp_cp_send(sp, PPP_LCP, ECHO_REPLY, h->ident, len - 4, 1865 h + 1); 1866 break; 1867 case ECHO_REPLY: 1868 if (cp->proto != PPP_LCP) 1869 goto illegal; 1870 if (h->ident != sp->lcp.echoid) { 1871 if_statinc(ifp, if_ierrors); 1872 break; 1873 } 1874 if (len < 8) { 1875 if (debug) 1876 addlog("%s: lcp invalid echo reply " 1877 "packet length: %d bytes\n", 1878 ifp->if_xname, len); 1879 break; 1880 } 1881 if (debug) 1882 addlog("%s: lcp got echo rep\n", 1883 ifp->if_xname); 1884 memcpy(&u32, h + 1, sizeof u32); 1885 if (ntohl(u32) != sp->lcp.magic) 1886 sp->pp_alivecnt = 0; 1887 break; 1888 default: 1889 /* Unknown packet type -- send Code-Reject packet. */ 1890 illegal: 1891 if (debug) 1892 addlog("%s: %s send code-rej for 0x%x\n", 1893 ifp->if_xname, cp->name, h->type); 1894 sppp_cp_send(sp, cp->proto, CODE_REJ, 1895 ++scp->seq, m->m_pkthdr.len, h); 1896 if_statinc(ifp, if_ierrors); 1897 } 1898 1899 out: 1900 SPPP_UNLOCK(sp); 1901 if (m != NULL) 1902 m_freem(m); 1903 } 1904 1905 /* 1906 * The generic part of all Up/Down/Open/Close/TO event handlers. 1907 * Basically, the state transition handling in the automaton. 1908 */ 1909 static void 1910 sppp_up_event(struct sppp *sp, void *xcp) 1911 { 1912 const struct cp *cp = xcp; 1913 STDDCL; 1914 1915 KASSERT(SPPP_WLOCKED(sp)); 1916 KASSERT(!cpu_softintr_p()); 1917 1918 if ((cp->flags & CP_AUTH) != 0 && 1919 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1920 return; 1921 1922 if (debug) 1923 log(LOG_DEBUG, "%s: %s up(%s)\n", 1924 ifp->if_xname, cp->name, 1925 sppp_state_name(sp->scp[cp->protoidx].state)); 1926 1927 switch (sp->scp[cp->protoidx].state) { 1928 case STATE_INITIAL: 1929 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1930 break; 1931 case STATE_STARTING: 1932 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 1933 (cp->scr)(sp); 1934 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1935 break; 1936 default: 1937 printf("%s: %s illegal up in state %s\n", 1938 ifp->if_xname, cp->name, 1939 sppp_state_name(sp->scp[cp->protoidx].state)); 1940 } 1941 } 1942 1943 static void 1944 sppp_down_event(struct sppp *sp, void *xcp) 1945 { 1946 const struct cp *cp = xcp; 1947 STDDCL; 1948 1949 KASSERT(SPPP_WLOCKED(sp)); 1950 KASSERT(!cpu_softintr_p()); 1951 1952 if ((cp->flags & CP_AUTH) != 0 && 1953 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 1954 return; 1955 1956 if (debug) 1957 log(LOG_DEBUG, "%s: %s down(%s)\n", 1958 ifp->if_xname, cp->name, 1959 sppp_state_name(sp->scp[cp->protoidx].state)); 1960 1961 switch (sp->scp[cp->protoidx].state) { 1962 case STATE_CLOSED: 1963 case STATE_CLOSING: 1964 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1965 break; 1966 case STATE_STOPPED: 1967 (cp->tls)(cp, sp); 1968 /* fall through */ 1969 case STATE_STOPPING: 1970 case STATE_REQ_SENT: 1971 case STATE_ACK_RCVD: 1972 case STATE_ACK_SENT: 1973 sppp_cp_change_state(cp, sp, STATE_STARTING); 1974 break; 1975 case STATE_OPENED: 1976 (cp->tld)(sp); 1977 sppp_cp_change_state(cp, sp, STATE_STARTING); 1978 break; 1979 default: 1980 /* 1981 * a down event may be caused regardless 1982 * of state just in LCP case. 1983 */ 1984 if (cp->proto == PPP_LCP) 1985 break; 1986 1987 printf("%s: %s illegal down in state %s\n", 1988 ifp->if_xname, cp->name, 1989 sppp_state_name(sp->scp[cp->protoidx].state)); 1990 } 1991 } 1992 1993 static void 1994 sppp_open_event(struct sppp *sp, void *xcp) 1995 { 1996 const struct cp *cp = xcp; 1997 STDDCL; 1998 1999 KASSERT(SPPP_WLOCKED(sp)); 2000 KASSERT(!cpu_softintr_p()); 2001 2002 if ((cp->flags & CP_AUTH) != 0 && 2003 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 2004 return; 2005 2006 if (debug) 2007 log(LOG_DEBUG, "%s: %s open(%s)\n", 2008 ifp->if_xname, cp->name, 2009 sppp_state_name(sp->scp[cp->protoidx].state)); 2010 2011 switch (sp->scp[cp->protoidx].state) { 2012 case STATE_INITIAL: 2013 sppp_cp_change_state(cp, sp, STATE_STARTING); 2014 (cp->tls)(cp, sp); 2015 break; 2016 case STATE_STARTING: 2017 break; 2018 case STATE_CLOSED: 2019 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2020 (cp->scr)(sp); 2021 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2022 break; 2023 case STATE_STOPPED: 2024 case STATE_STOPPING: 2025 case STATE_REQ_SENT: 2026 case STATE_ACK_RCVD: 2027 case STATE_ACK_SENT: 2028 case STATE_OPENED: 2029 break; 2030 case STATE_CLOSING: 2031 sppp_cp_change_state(cp, sp, STATE_STOPPING); 2032 break; 2033 } 2034 } 2035 2036 static void 2037 sppp_close_event(struct sppp *sp, void *xcp) 2038 { 2039 const struct cp *cp = xcp; 2040 STDDCL; 2041 2042 KASSERT(SPPP_WLOCKED(sp)); 2043 KASSERT(!cpu_softintr_p()); 2044 2045 if ((cp->flags & CP_AUTH) != 0 && 2046 sppp_auth_role(cp, sp) == SPPP_AUTH_NOROLE) 2047 return; 2048 2049 if (debug) 2050 log(LOG_DEBUG, "%s: %s close(%s)\n", 2051 ifp->if_xname, cp->name, 2052 sppp_state_name(sp->scp[cp->protoidx].state)); 2053 2054 switch (sp->scp[cp->protoidx].state) { 2055 case STATE_INITIAL: 2056 case STATE_CLOSED: 2057 case STATE_CLOSING: 2058 break; 2059 case STATE_STARTING: 2060 sppp_cp_change_state(cp, sp, STATE_INITIAL); 2061 (cp->tlf)(cp, sp); 2062 break; 2063 case STATE_STOPPED: 2064 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2065 break; 2066 case STATE_STOPPING: 2067 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2068 break; 2069 case STATE_OPENED: 2070 (cp->tld)(sp); 2071 /* fall through */ 2072 case STATE_REQ_SENT: 2073 case STATE_ACK_RCVD: 2074 case STATE_ACK_SENT: 2075 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_terminate; 2076 if ((cp->flags & CP_AUTH) == 0) { 2077 sppp_cp_send(sp, cp->proto, TERM_REQ, 2078 ++sp->scp[cp->protoidx].seq, 0, 0); 2079 } 2080 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2081 break; 2082 } 2083 } 2084 2085 static void 2086 sppp_to_event(struct sppp *sp, void *xcp) 2087 { 2088 const struct cp *cp = xcp; 2089 int s; 2090 STDDCL; 2091 2092 KASSERT(SPPP_WLOCKED(sp)); 2093 KASSERT(!cpu_softintr_p()); 2094 2095 s = splnet(); 2096 2097 if (debug) 2098 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 2099 ifp->if_xname, cp->name, 2100 sppp_state_name(sp->scp[cp->protoidx].state), 2101 sp->scp[cp->protoidx].rst_counter); 2102 2103 if (--sp->scp[cp->protoidx].rst_counter < 0) 2104 /* TO- event */ 2105 switch (sp->scp[cp->protoidx].state) { 2106 case STATE_CLOSING: 2107 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2108 (cp->tlf)(cp, sp); 2109 break; 2110 case STATE_STOPPING: 2111 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2112 (cp->tlf)(cp, sp); 2113 break; 2114 case STATE_REQ_SENT: 2115 case STATE_ACK_RCVD: 2116 case STATE_ACK_SENT: 2117 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2118 (cp->tlf)(cp, sp); 2119 break; 2120 } 2121 else 2122 /* TO+ event */ 2123 switch (sp->scp[cp->protoidx].state) { 2124 case STATE_CLOSING: 2125 case STATE_STOPPING: 2126 if ((cp->flags & CP_AUTH) == 0) { 2127 sppp_cp_send(sp, cp->proto, TERM_REQ, 2128 ++sp->scp[cp->protoidx].seq, 0, 0); 2129 } 2130 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2131 break; 2132 case STATE_REQ_SENT: 2133 case STATE_ACK_RCVD: 2134 (cp->scr)(sp); 2135 /* sppp_cp_change_state() will restart the timer */ 2136 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2137 break; 2138 case STATE_ACK_SENT: 2139 (cp->scr)(sp); 2140 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2141 break; 2142 } 2143 2144 splx(s); 2145 } 2146 static void 2147 sppp_rcr_update_state(const struct cp *cp, struct sppp *sp, 2148 enum cp_rcr_type type, uint8_t ident, size_t msglen, void *msg) 2149 { 2150 STDDCL; 2151 u_char ctype; 2152 2153 if (type == CP_RCR_ERR) { 2154 /* parse error, shut down */ 2155 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 2156 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 2157 } else if (type == CP_RCR_ACK) { 2158 /* RCR+ event */ 2159 ctype = CONF_ACK; 2160 switch (sp->scp[cp->protoidx].state) { 2161 case STATE_OPENED: 2162 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2163 cp->tld(sp); 2164 cp->scr(sp); 2165 cp->screply(cp, sp, ctype, ident, msglen, msg); 2166 break; 2167 case STATE_REQ_SENT: 2168 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2169 /* fall through */ 2170 case STATE_ACK_SENT: 2171 cp->screply(cp, sp, ctype, ident, msglen, msg); 2172 break; 2173 case STATE_STOPPED: 2174 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2175 cp->scr(sp); 2176 cp->screply(cp, sp, ctype, ident, msglen, msg); 2177 break; 2178 case STATE_ACK_RCVD: 2179 sppp_cp_change_state(cp, sp, STATE_OPENED); 2180 if (debug) 2181 log(LOG_DEBUG, "%s: %s tlu\n", 2182 ifp->if_xname, 2183 cp->name); 2184 cp->tlu(sp); 2185 cp->screply(cp, sp, ctype, ident, msglen, msg); 2186 break; 2187 case STATE_CLOSING: 2188 case STATE_STOPPING: 2189 break; 2190 case STATE_CLOSED: 2191 if ((cp->flags & CP_AUTH) == 0) { 2192 sppp_cp_send(sp, cp->proto, TERM_ACK, 2193 ident, 0, 0); 2194 } 2195 break; 2196 default: 2197 printf("%s: %s illegal RCR+ in state %s\n", 2198 ifp->if_xname, cp->name, 2199 sppp_state_name(sp->scp[cp->protoidx].state)); 2200 if_statinc(ifp, if_ierrors); 2201 } 2202 } else if (type == CP_RCR_NAK || type == CP_RCR_REJ) { 2203 ctype = type == CP_RCR_NAK ? CONF_NAK : CONF_REJ; 2204 /* RCR- event */ 2205 switch (sp->scp[cp->protoidx].state) { 2206 case STATE_OPENED: 2207 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2208 cp->tld(sp); 2209 cp->scr(sp); 2210 cp->screply(cp, sp, ctype, ident, msglen, msg); 2211 break; 2212 case STATE_ACK_SENT: 2213 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2214 /* fall through */ 2215 case STATE_REQ_SENT: 2216 cp->screply(cp, sp, ctype, ident, msglen, msg); 2217 break; 2218 case STATE_STOPPED: 2219 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2220 cp->scr(sp); 2221 cp->screply(cp, sp, ctype, ident, msglen, msg); 2222 break; 2223 case STATE_ACK_RCVD: 2224 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2225 cp->screply(cp, sp, ctype, ident, msglen, msg); 2226 break; 2227 case STATE_CLOSING: 2228 case STATE_STOPPING: 2229 break; 2230 case STATE_CLOSED: 2231 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2232 if ((cp->flags & CP_AUTH) == 0) { 2233 sppp_cp_send(sp, cp->proto, TERM_ACK, 2234 ident, 0, 0); 2235 } 2236 break; 2237 default: 2238 printf("%s: %s illegal RCR- in state %s\n", 2239 ifp->if_xname, cp->name, 2240 sppp_state_name(sp->scp[cp->protoidx].state)); 2241 if_statinc(ifp, if_ierrors); 2242 } 2243 } 2244 } 2245 2246 static void 2247 sppp_rcr_event(struct sppp *sp, void *xcp) 2248 { 2249 const struct cp *cp = xcp; 2250 struct sppp_cp *scp; 2251 struct lcp_header *h; 2252 struct mbuf *m; 2253 enum cp_rcr_type type; 2254 size_t len; 2255 uint8_t *buf; 2256 size_t blen, rlen; 2257 uint8_t ident; 2258 2259 KASSERT(!cpu_softintr_p()); 2260 2261 scp = &sp->scp[cp->protoidx]; 2262 2263 if (cp->parse_confreq != NULL) { 2264 m = scp->mbuf_confreq; 2265 if (m == NULL) 2266 return; 2267 scp->mbuf_confreq = NULL; 2268 2269 h = mtod(m, struct lcp_header *); 2270 if (h->type != CONF_REQ) { 2271 m_freem(m); 2272 return; 2273 } 2274 2275 ident = h->ident; 2276 len = MIN(m->m_pkthdr.len, ntohs(h->len)); 2277 2278 type = (cp->parse_confreq)(sp, h, len, 2279 &buf, &blen, &rlen); 2280 m_freem(m); 2281 } else { 2282 /* mbuf_cofreq is already parsed and freed */ 2283 type = scp->rcr_type; 2284 ident = scp->rconfid; 2285 buf = NULL; 2286 blen = rlen = 0; 2287 } 2288 2289 sppp_rcr_update_state(cp, sp, type, ident, rlen, (void *)buf); 2290 2291 if (buf != NULL) 2292 kmem_free(buf, blen); 2293 } 2294 2295 static void 2296 sppp_rca_event(struct sppp *sp, void *xcp) 2297 { 2298 const struct cp *cp = xcp; 2299 STDDCL; 2300 2301 KASSERT(!cpu_softintr_p()); 2302 2303 switch (sp->scp[cp->protoidx].state) { 2304 case STATE_CLOSED: 2305 case STATE_STOPPED: 2306 if ((cp->flags & CP_AUTH) == 0) { 2307 sppp_cp_send(sp, cp->proto, TERM_ACK, 2308 sp->scp[cp->protoidx].rconfid, 0, 0); 2309 } 2310 break; 2311 case STATE_CLOSING: 2312 case STATE_STOPPING: 2313 break; 2314 case STATE_REQ_SENT: 2315 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2316 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2317 break; 2318 case STATE_OPENED: 2319 (cp->tld)(sp); 2320 /* fall through */ 2321 case STATE_ACK_RCVD: 2322 (cp->scr)(sp); 2323 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2324 break; 2325 case STATE_ACK_SENT: 2326 sppp_cp_change_state(cp, sp, STATE_OPENED); 2327 sp->scp[cp->protoidx].rst_counter = sp->lcp.max_configure; 2328 if (debug) 2329 log(LOG_DEBUG, "%s: %s tlu\n", 2330 ifp->if_xname, cp->name); 2331 (cp->tlu)(sp); 2332 break; 2333 default: 2334 printf("%s: %s illegal RCA in state %s\n", 2335 ifp->if_xname, cp->name, 2336 sppp_state_name(sp->scp[cp->protoidx].state)); 2337 if_statinc(ifp, if_ierrors); 2338 } 2339 } 2340 2341 static void 2342 sppp_rcn_event(struct sppp *sp, void *xcp) 2343 { 2344 const struct cp *cp = xcp; 2345 struct sppp_cp *scp; 2346 struct lcp_header *h; 2347 struct mbuf *m; 2348 struct ifnet *ifp = &sp->pp_if; 2349 size_t len; 2350 2351 KASSERT(!cpu_softintr_p()); 2352 2353 scp = &sp->scp[cp->protoidx]; 2354 m = scp->mbuf_confnak; 2355 if (m == NULL) 2356 return; 2357 scp->mbuf_confnak = NULL; 2358 2359 h = mtod(m, struct lcp_header *); 2360 len = MIN(m->m_pkthdr.len, ntohs(h->len)); 2361 2362 switch (h->type) { 2363 case CONF_NAK: 2364 (cp->parse_confnak)(sp, h, len); 2365 break; 2366 case CONF_REJ: 2367 (cp->parse_confrej)(sp, h, len); 2368 break; 2369 default: 2370 m_freem(m); 2371 return; 2372 } 2373 2374 m_freem(m); 2375 2376 switch (scp->state) { 2377 case STATE_CLOSED: 2378 case STATE_STOPPED: 2379 if ((cp->flags & CP_AUTH) == 0) { 2380 sppp_cp_send(sp, cp->proto, TERM_ACK, 2381 scp->rconfid, 0, 0); 2382 } 2383 break; 2384 case STATE_REQ_SENT: 2385 case STATE_ACK_SENT: 2386 scp->rst_counter = sp->lcp.max_configure; 2387 (cp->scr)(sp); 2388 break; 2389 case STATE_OPENED: 2390 (cp->tld)(sp); 2391 /* fall through */ 2392 case STATE_ACK_RCVD: 2393 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 2394 (cp->scr)(sp); 2395 break; 2396 case STATE_CLOSING: 2397 case STATE_STOPPING: 2398 break; 2399 default: 2400 printf("%s: %s illegal RCN in state %s\n", 2401 ifp->if_xname, cp->name, 2402 sppp_state_name(scp->state)); 2403 if_statinc(ifp, if_ierrors); 2404 } 2405 } 2406 2407 static void 2408 sppp_rtr_event(struct sppp *sp, void *xcp) 2409 { 2410 const struct cp *cp = xcp; 2411 STDDCL; 2412 2413 KASSERT(!cpu_softintr_p()); 2414 2415 switch (sp->scp[cp->protoidx].state) { 2416 case STATE_ACK_RCVD: 2417 case STATE_ACK_SENT: 2418 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2419 break; 2420 case STATE_CLOSED: 2421 case STATE_STOPPED: 2422 case STATE_CLOSING: 2423 case STATE_STOPPING: 2424 case STATE_REQ_SENT: 2425 break; 2426 case STATE_OPENED: 2427 (cp->tld)(sp); 2428 sp->scp[cp->protoidx].rst_counter = 0; 2429 sppp_cp_change_state(cp, sp, STATE_STOPPING); 2430 break; 2431 default: 2432 printf("%s: %s illegal RTR in state %s\n", 2433 ifp->if_xname, cp->name, 2434 sppp_state_name(sp->scp[cp->protoidx].state)); 2435 if_statinc(ifp, if_ierrors); 2436 return; 2437 } 2438 2439 /* Send Terminate-Ack packet. */ 2440 if (debug) 2441 log(LOG_DEBUG, "%s: %s send terminate-ack\n", 2442 ifp->if_xname, cp->name); 2443 if ((cp->flags & CP_AUTH) == 0) { 2444 sppp_cp_send(sp, cp->proto, TERM_ACK, 2445 sp->scp[cp->protoidx].rseq, 0, 0); 2446 } 2447 } 2448 2449 static void 2450 sppp_rta_event(struct sppp *sp, void *xcp) 2451 { 2452 const struct cp *cp = xcp; 2453 struct ifnet *ifp = &sp->pp_if; 2454 2455 KASSERT(!cpu_softintr_p()); 2456 2457 switch (sp->scp[cp->protoidx].state) { 2458 case STATE_CLOSED: 2459 case STATE_STOPPED: 2460 case STATE_REQ_SENT: 2461 case STATE_ACK_SENT: 2462 break; 2463 case STATE_CLOSING: 2464 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2465 (cp->tlf)(cp, sp); 2466 break; 2467 case STATE_STOPPING: 2468 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2469 (cp->tlf)(cp, sp); 2470 break; 2471 case STATE_ACK_RCVD: 2472 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2473 break; 2474 case STATE_OPENED: 2475 (cp->tld)(sp); 2476 (cp->scr)(sp); 2477 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 2478 break; 2479 default: 2480 printf("%s: %s illegal RTA in state %s\n", 2481 ifp->if_xname, cp->name, 2482 sppp_state_name(sp->scp[cp->protoidx].state)); 2483 if_statinc(ifp, if_ierrors); 2484 } 2485 } 2486 2487 static void 2488 sppp_rxj_event(struct sppp *sp, void *xcp) 2489 { 2490 const struct cp *cp = xcp; 2491 struct ifnet *ifp = &sp->pp_if; 2492 2493 KASSERT(!cpu_softintr_p()); 2494 2495 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 2496 switch (sp->scp[cp->protoidx].state) { 2497 case STATE_CLOSED: 2498 case STATE_STOPPED: 2499 case STATE_REQ_SENT: 2500 case STATE_ACK_SENT: 2501 case STATE_CLOSING: 2502 case STATE_STOPPING: 2503 case STATE_OPENED: 2504 break; 2505 case STATE_ACK_RCVD: 2506 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2507 break; 2508 default: 2509 printf("%s: %s illegal RXJ- in state %s\n", 2510 ifp->if_xname, cp->name, 2511 sppp_state_name(sp->scp[cp->protoidx].state)); 2512 if_statinc(ifp, if_ierrors); 2513 } 2514 } 2515 2516 /* 2517 * Change the state of a control protocol in the state automaton. 2518 * Takes care of starting/stopping the restart timer. 2519 */ 2520 void 2521 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 2522 { 2523 2524 KASSERT(SPPP_WLOCKED(sp)); 2525 2526 sp->scp[cp->protoidx].state = newstate; 2527 callout_stop(&sp->scp[cp->protoidx].ch); 2528 switch (newstate) { 2529 case STATE_INITIAL: 2530 case STATE_STARTING: 2531 case STATE_CLOSED: 2532 case STATE_STOPPED: 2533 case STATE_OPENED: 2534 break; 2535 case STATE_CLOSING: 2536 case STATE_STOPPING: 2537 case STATE_REQ_SENT: 2538 case STATE_ACK_RCVD: 2539 case STATE_ACK_SENT: 2540 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 2541 break; 2542 } 2543 } 2544 2545 /* 2546 *--------------------------------------------------------------------------* 2547 * * 2548 * The LCP implementation. * 2549 * * 2550 *--------------------------------------------------------------------------* 2551 */ 2552 static void 2553 sppp_lcp_init(struct sppp *sp) 2554 { 2555 2556 KASSERT(SPPP_WLOCKED(sp)); 2557 2558 sppp_cp_init(&lcp, sp); 2559 2560 SET(sp->lcp.opts, SPPP_LCP_OPT_MAGIC); 2561 sp->lcp.magic = 0; 2562 sp->lcp.protos = 0; 2563 sp->lcp.max_terminate = 2; 2564 sp->lcp.max_configure = 10; 2565 sp->lcp.max_failure = 10; 2566 sp->lcp.tlf_sent = false; 2567 2568 /* 2569 * Initialize counters and timeout values. Note that we don't 2570 * use the 3 seconds suggested in RFC 1661 since we are likely 2571 * running on a fast link. XXX We should probably implement 2572 * the exponential backoff option. Note that these values are 2573 * relevant for all control protocols, not just LCP only. 2574 */ 2575 sp->lcp.timeout = 1 * hz; 2576 } 2577 2578 static void 2579 sppp_lcp_up(struct sppp *sp, void *xcp) 2580 { 2581 const struct cp *cp = xcp; 2582 int pidx; 2583 STDDCL; 2584 2585 KASSERT(SPPP_WLOCKED(sp)); 2586 2587 pidx = cp->protoidx; 2588 /* Initialize activity timestamp: opening a connection is an activity */ 2589 sp->pp_last_receive = sp->pp_last_activity = time_uptime; 2590 2591 /* 2592 * If this interface is passive or dial-on-demand, and we are 2593 * still in Initial state, it means we've got an incoming 2594 * call. Activate the interface. 2595 */ 2596 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2597 if (debug) 2598 log(LOG_DEBUG, 2599 "%s: Up event", ifp->if_xname); 2600 ifp->if_flags |= IFF_RUNNING; 2601 if (sp->scp[pidx].state == STATE_INITIAL) { 2602 if (debug) 2603 addlog("(incoming call)\n"); 2604 sp->pp_flags |= PP_CALLIN; 2605 sppp_wq_add(sp->wq_cp, &sp->scp[pidx].work_open); 2606 } else if (debug) 2607 addlog("\n"); 2608 } 2609 2610 sppp_up_event(sp, xcp); 2611 } 2612 2613 static void 2614 sppp_lcp_down(struct sppp *sp, void *xcp) 2615 { 2616 const struct cp *cp = xcp; 2617 int pidx; 2618 STDDCL; 2619 2620 KASSERT(SPPP_WLOCKED(sp)); 2621 KASSERT(!cpu_softintr_p()); 2622 2623 pidx = cp->protoidx; 2624 sppp_down_event(sp, xcp); 2625 2626 /* 2627 * We need to do tls to restart when a down event is caused 2628 * by the last tlf. 2629 */ 2630 if (sp->scp[pidx].state == STATE_STARTING && 2631 sp->lcp.tlf_sent) { 2632 cp->tls(cp, sp); 2633 sp->lcp.tlf_sent = false; 2634 } 2635 2636 /* 2637 * If this is neither a dial-on-demand nor a passive 2638 * interface, simulate an ``ifconfig down'' action, so the 2639 * administrator can force a redial by another ``ifconfig 2640 * up''. XXX For leased line operation, should we immediately 2641 * try to reopen the connection here? 2642 */ 2643 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2644 if (debug) 2645 log(LOG_INFO, 2646 "%s: Down event (carrier loss), taking interface down.\n", 2647 ifp->if_xname); 2648 SPPP_UNLOCK(sp); 2649 if_down(ifp); 2650 SPPP_LOCK(sp, RW_WRITER); 2651 2652 if (sp->lcp.reestablish) 2653 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 2654 } else { 2655 if (debug) 2656 log(LOG_DEBUG, 2657 "%s: Down event (carrier loss)\n", 2658 ifp->if_xname); 2659 2660 sp->pp_flags &= ~PP_CALLIN; 2661 if (sp->scp[pidx].state != STATE_INITIAL) 2662 sppp_wq_add(sp->wq_cp, &sp->scp[pidx].work_close); 2663 ifp->if_flags &= ~IFF_RUNNING; 2664 } 2665 sp->scp[pidx].fail_counter = 0; 2666 } 2667 2668 static void 2669 sppp_lcp_open(struct sppp *sp, void *xcp) 2670 { 2671 2672 KASSERT(SPPP_WLOCKED(sp)); 2673 KASSERT(!cpu_softintr_p()); 2674 2675 sp->lcp.reestablish = false; 2676 sp->scp[IDX_LCP].fail_counter = 0; 2677 2678 if (sp->pp_if.if_mtu < PP_MTU) { 2679 sp->lcp.mru = sp->pp_if.if_mtu; 2680 SET(sp->lcp.opts, SPPP_LCP_OPT_MRU); 2681 } else { 2682 sp->lcp.mru = PP_MTU; 2683 } 2684 sp->lcp.their_mru = PP_MTU; 2685 2686 /* 2687 * If we are authenticator, negotiate LCP_AUTH 2688 */ 2689 if (sp->hisauth.proto != 0) 2690 SET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 2691 else 2692 CLR(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 2693 sp->pp_flags &= ~PP_NEEDAUTH; 2694 sppp_open_event(sp, xcp); 2695 } 2696 2697 2698 /* 2699 * Analyze a configure request. Return true if it was agreeable, and 2700 * caused action sca, false if it has been rejected or nak'ed, and 2701 * caused action scn. (The return value is used to make the state 2702 * transition decision in the state automaton.) 2703 */ 2704 static enum cp_rcr_type 2705 sppp_lcp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 2706 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 2707 { 2708 STDDCL; 2709 u_char *buf, *r, *p, l, blen; 2710 enum cp_rcr_type type; 2711 int len, rlen; 2712 uint32_t nmagic; 2713 u_short authproto; 2714 2715 KASSERT(SPPP_WLOCKED(sp)); 2716 2717 if (origlen < sizeof(*h)) 2718 return CP_RCR_DROP; 2719 2720 origlen -= sizeof(*h); 2721 type = CP_RCR_NONE; 2722 type = 0; 2723 2724 if (origlen <= 0) 2725 return CP_RCR_DROP; 2726 else 2727 blen = origlen; 2728 2729 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 2730 if (buf == NULL) 2731 return CP_RCR_DROP; 2732 2733 if (debug) 2734 log(LOG_DEBUG, "%s: lcp parse opts:", 2735 ifp->if_xname); 2736 2737 /* pass 1: check for things that need to be rejected */ 2738 p = (void *)(h + 1); 2739 r = buf; 2740 rlen = 0; 2741 for (len = origlen; len > 1; len-= l, p += l) { 2742 l = p[1]; 2743 if (l == 0) 2744 break; 2745 2746 /* Sanity check option length */ 2747 if (l > len) { 2748 /* 2749 * Malicious option - drop immediately. 2750 * XXX Maybe we should just RXJ it? 2751 */ 2752 addlog("%s: received malicious LCP option 0x%02x, " 2753 "length 0x%02x, (len: 0x%02x) dropping.\n", ifp->if_xname, 2754 p[0], l, len); 2755 type = CP_RCR_ERR; 2756 goto end; 2757 } 2758 if (debug) 2759 addlog(" %s", sppp_lcp_opt_name(*p)); 2760 switch (p[0]) { 2761 case LCP_OPT_MAGIC: 2762 /* Magic number. */ 2763 /* fall through, both are same length */ 2764 case LCP_OPT_ASYNC_MAP: 2765 /* Async control character map. */ 2766 if (len >= 6 || l == 6) 2767 continue; 2768 if (debug) 2769 addlog(" [invalid]"); 2770 break; 2771 case LCP_OPT_MP_EID: 2772 if (len >= l && l >= 3) { 2773 switch (p[2]) { 2774 case 0: if (l==3+ 0) continue;break; 2775 case 2: if (l==3+ 4) continue;break; 2776 case 3: if (l==3+ 6) continue;break; 2777 case 6: if (l==3+16) continue;break; 2778 case 1: /* FALLTHROUGH */ 2779 case 4: if (l<=3+20) continue;break; 2780 case 5: if (l<=3+15) continue;break; 2781 /* XXX should it be default: continue;? */ 2782 } 2783 } 2784 if (debug) 2785 addlog(" [invalid class %d len %d]", p[2], l); 2786 break; 2787 case LCP_OPT_MP_SSNHF: 2788 if (len >= 2 && l == 2) { 2789 if (debug) 2790 addlog(" [rej]"); 2791 break; 2792 } 2793 if (debug) 2794 addlog(" [invalid]"); 2795 break; 2796 case LCP_OPT_MP_MRRU: 2797 /* Multilink maximum received reconstructed unit */ 2798 /* should be fall through, both are same length */ 2799 /* FALLTHROUGH */ 2800 case LCP_OPT_MRU: 2801 /* Maximum receive unit. */ 2802 if (len >= 4 && l == 4) 2803 continue; 2804 if (debug) 2805 addlog(" [invalid]"); 2806 break; 2807 case LCP_OPT_AUTH_PROTO: 2808 if (len < 4) { 2809 if (debug) 2810 addlog(" [invalid]"); 2811 break; 2812 } 2813 authproto = (p[2] << 8) + p[3]; 2814 if (authproto == PPP_CHAP && l != 5) { 2815 if (debug) 2816 addlog(" [invalid chap len]"); 2817 break; 2818 } 2819 if (ISSET(sp->myauth.flags, SPPP_AUTHFLAG_PASSIVEAUTHPROTO)) { 2820 if (authproto == PPP_PAP || authproto == PPP_CHAP) 2821 sp->myauth.proto = authproto; 2822 } 2823 if (sp->myauth.proto == 0) { 2824 /* we are not configured to do auth */ 2825 if (debug) 2826 addlog(" [not configured]"); 2827 break; 2828 } 2829 /* 2830 * Remote want us to authenticate, remember this, 2831 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2832 * up. 2833 */ 2834 sp->pp_flags |= PP_NEEDAUTH; 2835 continue; 2836 default: 2837 /* Others not supported. */ 2838 if (debug) 2839 addlog(" [rej]"); 2840 break; 2841 } 2842 if (rlen + l > blen) { 2843 if (debug) 2844 addlog(" [overflow]"); 2845 continue; 2846 } 2847 /* Add the option to rejected list. */ 2848 memcpy(r, p, l); 2849 r += l; 2850 rlen += l; 2851 } 2852 2853 if (rlen > 0) { 2854 type = CP_RCR_REJ; 2855 goto end; 2856 } 2857 2858 if (debug) 2859 addlog("\n"); 2860 2861 /* 2862 * pass 2: check for option values that are unacceptable and 2863 * thus require to be nak'ed. 2864 */ 2865 if (debug) 2866 log(LOG_DEBUG, "%s: lcp parse opt values: ", 2867 ifp->if_xname); 2868 2869 p = (void *)(h + 1); 2870 r = buf; 2871 rlen = 0; 2872 for (len = origlen; len > 0; len -= l, p += l) { 2873 l = p[1]; 2874 if (l == 0) 2875 break; 2876 2877 if (debug) 2878 addlog(" %s", sppp_lcp_opt_name(*p)); 2879 switch (p[0]) { 2880 case LCP_OPT_MAGIC: 2881 /* Magic number -- extract. */ 2882 nmagic = (uint32_t)p[2] << 24 | 2883 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2884 if (nmagic != sp->lcp.magic) { 2885 if (debug) 2886 addlog(" 0x%x", nmagic); 2887 continue; 2888 } 2889 /* 2890 * Local and remote magics equal -- loopback? 2891 */ 2892 if (sp->pp_loopcnt >= LOOPALIVECNT*5) { 2893 printf ("%s: loopback\n", 2894 ifp->if_xname); 2895 sp->pp_loopcnt = 0; 2896 if (ifp->if_flags & IFF_UP) { 2897 SPPP_UNLOCK(sp); 2898 if_down(ifp); 2899 SPPP_LOCK(sp, RW_WRITER); 2900 2901 IF_PURGE(&sp->pp_cpq); 2902 /* XXX ? */ 2903 sppp_wq_add(sp->wq_cp, 2904 &sp->scp[IDX_LCP].work_down); 2905 sppp_wq_add(sp->wq_cp, 2906 &sp->scp[IDX_LCP].work_up); 2907 } 2908 } else if (debug) 2909 addlog(" [glitch]"); 2910 ++sp->pp_loopcnt; 2911 /* 2912 * We negate our magic here, and NAK it. If 2913 * we see it later in an NAK packet, we 2914 * suggest a new one. 2915 */ 2916 nmagic = ~sp->lcp.magic; 2917 /* Gonna NAK it. */ 2918 p[2] = nmagic >> 24; 2919 p[3] = nmagic >> 16; 2920 p[4] = nmagic >> 8; 2921 p[5] = nmagic; 2922 break; 2923 2924 case LCP_OPT_ASYNC_MAP: 2925 /* 2926 * Async control character map -- just ignore it. 2927 * 2928 * Quote from RFC 1662, chapter 6: 2929 * To enable this functionality, synchronous PPP 2930 * implementations MUST always respond to the 2931 * Async-Control-Character-Map Configuration 2932 * Option with the LCP Configure-Ack. However, 2933 * acceptance of the Configuration Option does 2934 * not imply that the synchronous implementation 2935 * will do any ACCM mapping. Instead, all such 2936 * octet mapping will be performed by the 2937 * asynchronous-to-synchronous converter. 2938 */ 2939 continue; 2940 2941 case LCP_OPT_MRU: 2942 /* 2943 * Maximum receive unit. Always agreeable, 2944 * but ignored by now. 2945 */ 2946 sp->lcp.their_mru = p[2] * 256 + p[3]; 2947 if (debug) 2948 addlog(" %ld", sp->lcp.their_mru); 2949 continue; 2950 2951 case LCP_OPT_AUTH_PROTO: 2952 authproto = (p[2] << 8) + p[3]; 2953 if (ISSET(sp->myauth.flags, SPPP_AUTHFLAG_PASSIVEAUTHPROTO)) { 2954 if (authproto == PPP_PAP || authproto == PPP_CHAP) 2955 sp->myauth.proto = authproto; 2956 } 2957 if (sp->myauth.proto == authproto) { 2958 if (authproto != PPP_CHAP || p[4] == CHAP_MD5) { 2959 continue; 2960 } 2961 if (debug) 2962 addlog(" [chap without MD5]"); 2963 } else { 2964 if (debug) 2965 addlog(" [mine %s != his %s]", 2966 sppp_proto_name(sp->myauth.proto), 2967 sppp_proto_name(authproto)); 2968 } 2969 /* not agreed, nak */ 2970 if (sp->myauth.proto == PPP_CHAP) { 2971 l = 5; 2972 } else { 2973 l = 4; 2974 } 2975 2976 if (rlen + l > blen) { 2977 if (debug) 2978 addlog(" [overflow]"); 2979 continue; 2980 } 2981 2982 r[0] = LCP_OPT_AUTH_PROTO; 2983 r[1] = l; 2984 r[2] = sp->myauth.proto >> 8; 2985 r[3] = sp->myauth.proto & 0xff; 2986 if (sp->myauth.proto == PPP_CHAP) 2987 r[4] = CHAP_MD5; 2988 rlen += l; 2989 r += l; 2990 continue; 2991 case LCP_OPT_MP_EID: 2992 /* 2993 * Endpoint identification. 2994 * Always agreeable, 2995 * but ignored by now. 2996 */ 2997 if (debug) { 2998 addlog(" type %d", p[2]); 2999 sppp_print_bytes(p+3, p[1]-3); 3000 } 3001 continue; 3002 case LCP_OPT_MP_MRRU: 3003 /* 3004 * Maximum received reconstructed unit. 3005 * Always agreeable, 3006 * but ignored by now. 3007 */ 3008 sp->lcp.their_mrru = p[2] * 256 + p[3]; 3009 if (debug) 3010 addlog(" %ld", sp->lcp.their_mrru); 3011 continue; 3012 } 3013 if (rlen + l > blen) { 3014 if (debug) 3015 addlog(" [overflow]"); 3016 continue; 3017 } 3018 /* Add the option to nak'ed list. */ 3019 memcpy(r, p, l); 3020 r += l; 3021 rlen += l; 3022 } 3023 3024 if (rlen > 0) { 3025 if (++sp->scp[IDX_LCP].fail_counter >= sp->lcp.max_failure) { 3026 if (debug) 3027 addlog(" max_failure (%d) exceeded, ", 3028 sp->lcp.max_failure); 3029 type = CP_RCR_REJ; 3030 } else { 3031 type = CP_RCR_NAK; 3032 } 3033 } else { 3034 type = CP_RCR_ACK; 3035 rlen = origlen; 3036 memcpy(r, h + 1, rlen); 3037 sp->scp[IDX_LCP].fail_counter = 0; 3038 sp->pp_loopcnt = 0; 3039 } 3040 3041 end: 3042 if (debug) 3043 addlog("\n"); 3044 3045 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 3046 if (buf != NULL) 3047 kmem_intr_free(buf, blen); 3048 } else { 3049 *msgbuf = buf; 3050 *buflen = blen; 3051 *msglen = rlen; 3052 } 3053 3054 return type; 3055 } 3056 3057 /* 3058 * Analyze the LCP Configure-Reject option list, and adjust our 3059 * negotiation. 3060 */ 3061 static void 3062 sppp_lcp_confrej(struct sppp *sp, struct lcp_header *h, int len) 3063 { 3064 STDDCL; 3065 u_char *p, l; 3066 3067 KASSERT(SPPP_WLOCKED(sp)); 3068 3069 if (len <= sizeof(*h)) 3070 return; 3071 3072 len -= sizeof(*h); 3073 3074 if (debug) 3075 log(LOG_DEBUG, "%s: lcp rej opts:", 3076 ifp->if_xname); 3077 3078 p = (void *)(h + 1); 3079 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3080 /* Sanity check option length */ 3081 if (l > len) { 3082 /* 3083 * Malicious option - drop immediately. 3084 * XXX Maybe we should just RXJ it? 3085 */ 3086 addlog("%s: received malicious LCP option, " 3087 "dropping.\n", ifp->if_xname); 3088 goto end; 3089 } 3090 if (debug) 3091 addlog(" %s", sppp_lcp_opt_name(*p)); 3092 switch (p[0]) { 3093 case LCP_OPT_MAGIC: 3094 /* Magic number -- can't use it, use 0 */ 3095 CLR(sp->lcp.opts, SPPP_LCP_OPT_MAGIC); 3096 sp->lcp.magic = 0; 3097 break; 3098 case LCP_OPT_MRU: 3099 /* 3100 * We try to negotiate a lower MRU if the underlying 3101 * link's MTU is less than PP_MTU (e.g. PPPoE). If the 3102 * peer rejects this lower rate, fallback to the 3103 * default. 3104 */ 3105 if (debug) { 3106 addlog("%s: warning: peer rejected our MRU of " 3107 "%ld bytes. Defaulting to %d bytes\n", 3108 ifp->if_xname, sp->lcp.mru, PP_MTU); 3109 } 3110 CLR(sp->lcp.opts, SPPP_LCP_OPT_MRU); 3111 sp->lcp.mru = PP_MTU; 3112 break; 3113 case LCP_OPT_AUTH_PROTO: 3114 /* 3115 * Peer doesn't want to authenticate himself, 3116 * deny unless this is a dialout call, and 3117 * SPPP_AUTHFLAG_NOCALLOUT is set. 3118 */ 3119 if ((sp->pp_flags & PP_CALLIN) == 0 && 3120 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 3121 if (debug) 3122 addlog(" [don't insist on auth " 3123 "for callout]"); 3124 CLR(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 3125 break; 3126 } 3127 if (debug) 3128 addlog("[access denied]\n"); 3129 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3130 break; 3131 } 3132 } 3133 if (debug) 3134 addlog("\n"); 3135 end: 3136 return; 3137 } 3138 3139 /* 3140 * Analyze the LCP Configure-NAK option list, and adjust our 3141 * negotiation. 3142 */ 3143 static void 3144 sppp_lcp_confnak(struct sppp *sp, struct lcp_header *h, int len) 3145 { 3146 STDDCL; 3147 u_char *p, l; 3148 uint32_t magic; 3149 3150 KASSERT(SPPP_WLOCKED(sp)); 3151 3152 if (len <= sizeof(*h)) 3153 return; 3154 len -= sizeof(*h); 3155 3156 if (debug) 3157 log(LOG_DEBUG, "%s: lcp nak opts:", 3158 ifp->if_xname); 3159 3160 p = (void *)(h + 1); 3161 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3162 /* Sanity check option length */ 3163 if (l > len) { 3164 /* 3165 * Malicious option - drop immediately. 3166 * XXX Maybe we should just RXJ it? 3167 */ 3168 addlog("%s: received malicious LCP option, " 3169 "dropping.\n", ifp->if_xname); 3170 goto end; 3171 } 3172 if (debug) 3173 addlog(" %s", sppp_lcp_opt_name(*p)); 3174 switch (p[0]) { 3175 case LCP_OPT_MAGIC: 3176 /* Magic number -- renegotiate */ 3177 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_MAGIC) && 3178 len >= 6 && l == 6) { 3179 magic = (uint32_t)p[2] << 24 | 3180 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 3181 /* 3182 * If the remote magic is our negated one, 3183 * this looks like a loopback problem. 3184 * Suggest a new magic to make sure. 3185 */ 3186 if (magic == ~sp->lcp.magic) { 3187 if (debug) 3188 addlog(" magic glitch"); 3189 sp->lcp.magic = cprng_fast32(); 3190 } else { 3191 sp->lcp.magic = magic; 3192 if (debug) 3193 addlog(" %d", magic); 3194 } 3195 } 3196 break; 3197 case LCP_OPT_MRU: 3198 /* 3199 * Peer wants to advise us to negotiate an MRU. 3200 * Agree on it if it's reasonable, or use 3201 * default otherwise. 3202 */ 3203 if (len >= 4 && l == 4) { 3204 u_int mru = p[2] * 256 + p[3]; 3205 if (debug) 3206 addlog(" %d", mru); 3207 if (mru < PPP_MINMRU || mru > sp->pp_if.if_mtu) 3208 mru = sp->pp_if.if_mtu; 3209 sp->lcp.mru = mru; 3210 SET(sp->lcp.opts, SPPP_LCP_OPT_MRU); 3211 } 3212 break; 3213 case LCP_OPT_AUTH_PROTO: 3214 /* 3215 * Peer doesn't like our authentication method, 3216 * deny. 3217 */ 3218 if (debug) 3219 addlog("[access denied]\n"); 3220 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3221 break; 3222 } 3223 } 3224 if (debug) 3225 addlog("\n"); 3226 end: 3227 return; 3228 } 3229 3230 static void 3231 sppp_lcp_tlu(struct sppp *sp) 3232 { 3233 STDDCL; 3234 int i; 3235 3236 KASSERT(SPPP_WLOCKED(sp)); 3237 3238 /* unlock for IFNET_LOCK and if_up() */ 3239 SPPP_UNLOCK(sp); 3240 3241 /* XXX ? */ 3242 if (! (ifp->if_flags & IFF_UP) && 3243 (ifp->if_flags & IFF_RUNNING)) { 3244 /* Coming out of loopback mode. */ 3245 if_up(ifp); 3246 } 3247 3248 IFNET_LOCK(ifp); 3249 SPPP_LOCK(sp, RW_WRITER); 3250 3251 if (ifp->if_mtu > sp->lcp.their_mru) { 3252 sp->pp_saved_mtu = ifp->if_mtu; 3253 ifp->if_mtu = sp->lcp.their_mru; 3254 if (debug) { 3255 log(LOG_DEBUG, 3256 "%s: setting MTU " 3257 "from %"PRIu64" bytes " 3258 "to %"PRIu64" bytes\n", 3259 ifp->if_xname, sp->pp_saved_mtu, 3260 ifp->if_mtu); 3261 } 3262 } 3263 IFNET_UNLOCK(ifp); 3264 3265 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO) || 3266 (sp->pp_flags & PP_NEEDAUTH) != 0) 3267 sppp_change_phase(sp, SPPP_PHASE_AUTHENTICATE); 3268 else 3269 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 3270 3271 /* 3272 * Open all authentication protocols. This is even required 3273 * if we already proceeded to network phase, since it might be 3274 * that remote wants us to authenticate, so we might have to 3275 * send a PAP request. Undesired authentication protocols 3276 * don't do anything when they get an Open event. 3277 */ 3278 for (i = 0; i < IDX_COUNT; i++) 3279 if ((cps[i])->flags & CP_AUTH) { 3280 sppp_wq_add(sp->wq_cp, 3281 &sp->scp[(cps[i])->protoidx].work_open); 3282 } 3283 3284 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 3285 /* Notify all NCPs. */ 3286 for (i = 0; i < IDX_COUNT; i++) 3287 if ((cps[i])->flags & CP_NCP) { 3288 sppp_wq_add(sp->wq_cp, 3289 &sp->scp[(cps[i])->protoidx].work_open); 3290 } 3291 } 3292 3293 /* notify low-level driver of state change */ 3294 sppp_notify_chg_wlocked(sp); 3295 } 3296 3297 static void 3298 sppp_lcp_tld(struct sppp *sp) 3299 { 3300 STDDCL; 3301 int i, pi, phase; 3302 3303 KASSERT(SPPP_WLOCKED(sp)); 3304 3305 phase = sp->pp_phase; 3306 3307 sppp_change_phase(sp, SPPP_PHASE_TERMINATE); 3308 3309 if (sp->pp_saved_mtu > 0) { 3310 SPPP_UNLOCK(sp); 3311 IFNET_LOCK(ifp); 3312 SPPP_LOCK(sp, RW_WRITER); 3313 3314 if (debug) { 3315 log(LOG_DEBUG, 3316 "%s: setting MTU " 3317 "from %"PRIu64" bytes " 3318 "to %"PRIu64" bytes\n", 3319 ifp->if_xname, ifp->if_mtu, 3320 sp->pp_saved_mtu); 3321 } 3322 3323 ifp->if_mtu = sp->pp_saved_mtu; 3324 sp->pp_saved_mtu = 0; 3325 IFNET_UNLOCK(ifp); 3326 } 3327 3328 /* 3329 * Take upper layers down. We send the Down event first and 3330 * the Close second to prevent the upper layers from sending 3331 * ``a flurry of terminate-request packets'', as the RFC 3332 * describes it. 3333 */ 3334 for (i = 0; i < IDX_COUNT; i++) { 3335 pi = (cps[i])->protoidx; 3336 if (((cps[i])->flags & CP_LCP) == 0) { 3337 /* skip if ncp was not started */ 3338 if (phase != SPPP_PHASE_NETWORK && 3339 ((cps[i])->flags & CP_NCP) != 0) 3340 continue; 3341 3342 sppp_wq_add(sp->wq_cp, &sp->scp[pi].work_down); 3343 sppp_wq_add(sp->wq_cp, &sp->scp[pi].work_close); 3344 } 3345 } 3346 } 3347 3348 static void 3349 sppp_lcp_tls(const struct cp *cp __unused, struct sppp *sp) 3350 { 3351 3352 KASSERT(SPPP_WLOCKED(sp)); 3353 3354 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 3355 printf("%s: authentication failed %d times, not retrying again\n", 3356 sp->pp_if.if_xname, sp->pp_auth_failures); 3357 3358 SPPP_UNLOCK(sp); 3359 if_down(&sp->pp_if); 3360 SPPP_LOCK(sp, RW_WRITER); 3361 return; 3362 } 3363 3364 sppp_change_phase(sp, SPPP_PHASE_ESTABLISH); 3365 3366 /* Notify lower layer if desired. */ 3367 sppp_notify_tls_wlocked(sp); 3368 sp->lcp.tlf_sent = false; 3369 } 3370 3371 static void 3372 sppp_lcp_tlf(const struct cp *cp __unused, struct sppp *sp) 3373 { 3374 3375 KASSERT(SPPP_WLOCKED(sp)); 3376 3377 sppp_change_phase(sp, SPPP_PHASE_DEAD); 3378 3379 /* Notify lower layer if desired. */ 3380 sppp_notify_tlf_wlocked(sp); 3381 3382 switch (sp->scp[IDX_LCP].state) { 3383 case STATE_CLOSED: 3384 case STATE_STOPPED: 3385 sp->lcp.tlf_sent = true; 3386 break; 3387 case STATE_INITIAL: 3388 default: 3389 /* just in case */ 3390 sp->lcp.tlf_sent = false; 3391 } 3392 } 3393 3394 static void 3395 sppp_lcp_scr(struct sppp *sp) 3396 { 3397 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 3398 int i = 0; 3399 u_short authproto; 3400 3401 KASSERT(SPPP_WLOCKED(sp)); 3402 3403 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_MAGIC)) { 3404 if (! sp->lcp.magic) 3405 sp->lcp.magic = cprng_fast32(); 3406 opt[i++] = LCP_OPT_MAGIC; 3407 opt[i++] = 6; 3408 opt[i++] = sp->lcp.magic >> 24; 3409 opt[i++] = sp->lcp.magic >> 16; 3410 opt[i++] = sp->lcp.magic >> 8; 3411 opt[i++] = sp->lcp.magic; 3412 } 3413 3414 if (ISSET(sp->lcp.opts,SPPP_LCP_OPT_MRU)) { 3415 opt[i++] = LCP_OPT_MRU; 3416 opt[i++] = 4; 3417 opt[i++] = sp->lcp.mru >> 8; 3418 opt[i++] = sp->lcp.mru; 3419 } 3420 3421 if (ISSET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO)) { 3422 authproto = sp->hisauth.proto; 3423 opt[i++] = LCP_OPT_AUTH_PROTO; 3424 opt[i++] = authproto == PPP_CHAP? 5: 4; 3425 opt[i++] = authproto >> 8; 3426 opt[i++] = authproto; 3427 if (authproto == PPP_CHAP) 3428 opt[i++] = CHAP_MD5; 3429 } 3430 3431 sp->scp[IDX_LCP].confid = ++sp->scp[IDX_LCP].seq; 3432 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->scp[IDX_LCP].confid, i, &opt); 3433 } 3434 3435 /* 3436 * Check the open NCPs, return true if at least one NCP is open. 3437 */ 3438 3439 static int 3440 sppp_cp_check(struct sppp *sp, u_char cp_flags) 3441 { 3442 int i, mask; 3443 3444 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 3445 if ((sp->lcp.protos & mask) && (cps[i])->flags & cp_flags) 3446 return 1; 3447 return 0; 3448 } 3449 3450 /* 3451 * Re-check the open NCPs and see if we should terminate the link. 3452 * Called by the NCPs during their tlf action handling. 3453 */ 3454 static void 3455 sppp_lcp_check_and_close(struct sppp *sp) 3456 { 3457 3458 KASSERT(SPPP_WLOCKED(sp)); 3459 3460 if (sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 3461 /* don't bother, we are already going down */ 3462 return; 3463 } 3464 3465 if (sp->pp_phase == SPPP_PHASE_AUTHENTICATE && 3466 sppp_cp_check(sp, CP_AUTH)) 3467 return; 3468 3469 if (sp->pp_phase >= SPPP_PHASE_NETWORK && 3470 sppp_cp_check(sp, CP_NCP)) 3471 return; 3472 3473 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 3474 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_open); 3475 } 3476 3477 /* 3478 *--------------------------------------------------------------------------* 3479 * * 3480 * The IPCP implementation. * 3481 * * 3482 *--------------------------------------------------------------------------* 3483 */ 3484 3485 static void 3486 sppp_ipcp_init(struct sppp *sp) 3487 { 3488 3489 KASSERT(SPPP_WLOCKED(sp)); 3490 3491 sppp_cp_init(&ipcp, sp); 3492 3493 sp->ipcp.opts = 0; 3494 sp->ipcp.flags = 0; 3495 } 3496 3497 static void 3498 sppp_ipcp_open(struct sppp *sp, void *xcp) 3499 { 3500 STDDCL; 3501 uint32_t myaddr, hisaddr; 3502 3503 KASSERT(SPPP_WLOCKED(sp)); 3504 KASSERT(!cpu_softintr_p()); 3505 3506 if (!ISSET(sp->pp_ncpflags, SPPP_NCP_IPCP)) 3507 return; 3508 3509 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 3510 sp->ipcp.req_myaddr = 0; 3511 sp->ipcp.req_hisaddr = 0; 3512 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 3513 3514 #ifdef INET 3515 kpreempt_disable(); 3516 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3517 kpreempt_enable(); 3518 #else 3519 myaddr = hisaddr = 0; 3520 #endif 3521 /* 3522 * If we don't have his address, this probably means our 3523 * interface doesn't want to talk IP at all. (This could 3524 * be the case if somebody wants to speak only IPX, for 3525 * example.) Don't open IPCP in this case. 3526 */ 3527 if (hisaddr == 0) { 3528 /* XXX this message should go away */ 3529 if (debug) 3530 log(LOG_DEBUG, "%s: ipcp_open(): no IP interface\n", 3531 ifp->if_xname); 3532 return; 3533 } 3534 3535 if (myaddr == 0) { 3536 /* 3537 * I don't have an assigned address, so i need to 3538 * negotiate my address. 3539 */ 3540 sp->ipcp.flags |= IPCP_MYADDR_DYN; 3541 SET(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS); 3542 } 3543 if (hisaddr == 1) { 3544 /* 3545 * XXX - remove this hack! 3546 * remote has no valid address, we need to get one assigned. 3547 */ 3548 sp->ipcp.flags |= IPCP_HISADDR_DYN; 3549 sp->ipcp.saved_hisaddr = htonl(hisaddr); 3550 } 3551 3552 if (sp->query_dns & 1) { 3553 SET(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS); 3554 } else { 3555 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS); 3556 } 3557 3558 if (sp->query_dns & 2) { 3559 SET(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS); 3560 } else { 3561 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS); 3562 } 3563 sppp_open_event(sp, xcp); 3564 } 3565 3566 static void 3567 sppp_ipcp_close(struct sppp *sp, void *xcp) 3568 { 3569 3570 KASSERT(SPPP_WLOCKED(sp)); 3571 KASSERT(!cpu_softintr_p()); 3572 3573 sppp_close_event(sp, xcp); 3574 3575 #ifdef INET 3576 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 3577 /* 3578 * Some address was dynamic, clear it again. 3579 */ 3580 sppp_clear_ip_addrs(sp); 3581 #endif 3582 } 3583 3584 /* 3585 * Analyze a configure request. Return true if it was agreeable, and 3586 * caused action sca, false if it has been rejected or nak'ed, and 3587 * caused action scn. (The return value is used to make the state 3588 * transition decision in the state automaton.) 3589 */ 3590 static enum cp_rcr_type 3591 sppp_ipcp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 3592 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 3593 { 3594 u_char *buf, *r, *p, l, blen; 3595 enum cp_rcr_type type; 3596 struct ifnet *ifp = &sp->pp_if; 3597 int rlen, len, debug = ifp->if_flags & IFF_DEBUG; 3598 uint32_t hisaddr, desiredaddr; 3599 3600 KASSERT(SPPP_WLOCKED(sp)); 3601 3602 type = CP_RCR_NONE; 3603 origlen -= sizeof(*h); 3604 3605 if (origlen < 0) 3606 return CP_RCR_DROP; 3607 3608 /* 3609 * Make sure to allocate a buf that can at least hold a 3610 * conf-nak with an `address' option. We might need it below. 3611 */ 3612 blen = MAX(6, origlen); 3613 3614 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 3615 if (buf == NULL) 3616 return CP_RCR_DROP; 3617 3618 /* pass 1: see if we can recognize them */ 3619 if (debug) 3620 log(LOG_DEBUG, "%s: ipcp parse opts:", 3621 ifp->if_xname); 3622 p = (void *)(h + 1); 3623 r = buf; 3624 rlen = 0; 3625 for (len = origlen; len > 1; len -= l, p += l) { 3626 l = p[1]; 3627 if (l == 0) 3628 break; 3629 3630 /* Sanity check option length */ 3631 if (l > len) { 3632 /* XXX should we just RXJ? */ 3633 addlog("%s: malicious IPCP option received, dropping\n", 3634 ifp->if_xname); 3635 type = CP_RCR_ERR; 3636 goto end; 3637 } 3638 if (debug) 3639 addlog(" %s", sppp_ipcp_opt_name(*p)); 3640 switch (p[0]) { 3641 #ifdef notyet 3642 case IPCP_OPT_COMPRESSION: 3643 if (len >= 6 && l >= 6) { 3644 /* correctly formed compress option */ 3645 continue; 3646 } 3647 if (debug) 3648 addlog(" [invalid]"); 3649 break; 3650 #endif 3651 case IPCP_OPT_ADDRESS: 3652 if (len >= 6 && l == 6) { 3653 /* correctly formed address option */ 3654 continue; 3655 } 3656 if (debug) 3657 addlog(" [invalid]"); 3658 break; 3659 default: 3660 /* Others not supported. */ 3661 if (debug) 3662 addlog(" [rej]"); 3663 break; 3664 } 3665 /* Add the option to rejected list. */ 3666 if (rlen + l > blen) { 3667 if (debug) 3668 addlog(" [overflow]"); 3669 continue; 3670 } 3671 memcpy(r, p, l); 3672 r += l; 3673 rlen += l; 3674 } 3675 3676 if (rlen > 0) { 3677 type = CP_RCR_REJ; 3678 goto end; 3679 } 3680 3681 if (debug) 3682 addlog("\n"); 3683 3684 /* pass 2: parse option values */ 3685 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 3686 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 3687 else 3688 #ifdef INET 3689 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 3690 #else 3691 hisaddr = 0; 3692 #endif 3693 if (debug) 3694 log(LOG_DEBUG, "%s: ipcp parse opt values: ", 3695 ifp->if_xname); 3696 p = (void *)(h + 1); 3697 r = buf; 3698 rlen = 0; 3699 for (len = origlen; len > 1; len -= l, p += l) { 3700 l = p[1]; 3701 if (l == 0) 3702 break; 3703 3704 if (debug) 3705 addlog(" %s", sppp_ipcp_opt_name(*p)); 3706 switch (p[0]) { 3707 #ifdef notyet 3708 case IPCP_OPT_COMPRESSION: 3709 continue; 3710 #endif 3711 case IPCP_OPT_ADDRESS: 3712 desiredaddr = p[2] << 24 | p[3] << 16 | 3713 p[4] << 8 | p[5]; 3714 if (desiredaddr == hisaddr || 3715 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 3716 /* 3717 * Peer's address is same as our value, 3718 * this is agreeable. Gonna conf-ack 3719 * it. 3720 */ 3721 if (debug) 3722 addlog(" %s [ack]", 3723 sppp_dotted_quad(hisaddr)); 3724 /* record that we've seen it already */ 3725 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 3726 sp->ipcp.req_hisaddr = desiredaddr; 3727 hisaddr = desiredaddr; 3728 continue; 3729 } 3730 /* 3731 * The address wasn't agreeable. This is either 3732 * he sent us 0.0.0.0, asking to assign him an 3733 * address, or he send us another address not 3734 * matching our value. Either case, we gonna 3735 * conf-nak it with our value. 3736 */ 3737 if (debug) { 3738 if (desiredaddr == 0) 3739 addlog(" [addr requested]"); 3740 else 3741 addlog(" %s [not agreed]", 3742 sppp_dotted_quad(desiredaddr)); 3743 } 3744 3745 p[2] = hisaddr >> 24; 3746 p[3] = hisaddr >> 16; 3747 p[4] = hisaddr >> 8; 3748 p[5] = hisaddr; 3749 break; 3750 } 3751 if (rlen + l > blen) { 3752 if (debug) 3753 addlog(" [overflow]"); 3754 continue; 3755 } 3756 /* Add the option to nak'ed list. */ 3757 memcpy(r, p, l); 3758 r += l; 3759 rlen += l; 3760 } 3761 3762 if (rlen > 0) { 3763 type = CP_RCR_NAK; 3764 } else { 3765 if ((sp->ipcp.flags & IPCP_HISADDR_SEEN) == 0) { 3766 /* 3767 * If we are about to conf-ack the request, but haven't seen 3768 * his address so far, gonna conf-nak it instead, with the 3769 * `address' option present and our idea of his address being 3770 * filled in there, to request negotiation of both addresses. 3771 * 3772 * XXX This can result in an endless req - nak loop if peer 3773 * doesn't want to send us his address. Q: What should we do 3774 * about it? XXX A: implement the max-failure counter. 3775 */ 3776 buf[0] = IPCP_OPT_ADDRESS; 3777 buf[1] = 6; 3778 buf[2] = hisaddr >> 24; 3779 buf[3] = hisaddr >> 16; 3780 buf[4] = hisaddr >> 8; 3781 buf[5] = hisaddr; 3782 rlen = 6; 3783 if (debug) 3784 addlog(" still need hisaddr"); 3785 type = CP_RCR_NAK; 3786 } else { 3787 type = CP_RCR_ACK; 3788 rlen = origlen; 3789 memcpy(r, h + 1, rlen); 3790 } 3791 } 3792 3793 end: 3794 if (debug) 3795 addlog("\n"); 3796 3797 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 3798 if (buf != NULL) 3799 kmem_intr_free(buf, blen); 3800 } else { 3801 *msgbuf = buf; 3802 *buflen = blen; 3803 *msglen = rlen; 3804 } 3805 3806 return type; 3807 } 3808 3809 /* 3810 * Analyze the IPCP Configure-Reject option list, and adjust our 3811 * negotiation. 3812 */ 3813 static void 3814 sppp_ipcp_confrej(struct sppp *sp, struct lcp_header *h, int len) 3815 { 3816 u_char *p, l; 3817 struct ifnet *ifp = &sp->pp_if; 3818 int debug = ifp->if_flags & IFF_DEBUG; 3819 3820 KASSERT(SPPP_WLOCKED(sp)); 3821 3822 if (len <= sizeof(*h)) 3823 return; 3824 3825 len -= sizeof(*h); 3826 3827 if (debug) 3828 log(LOG_DEBUG, "%s: ipcp rej opts:", 3829 ifp->if_xname); 3830 3831 p = (void *)(h + 1); 3832 for (; len > 1; len -= l, p += l) { 3833 l = p[1]; 3834 if (l == 0) 3835 break; 3836 3837 /* Sanity check option length */ 3838 if (l > len) { 3839 /* XXX should we just RXJ? */ 3840 addlog("%s: malicious IPCP option received, dropping\n", 3841 ifp->if_xname); 3842 goto end; 3843 } 3844 if (debug) 3845 addlog(" %s", sppp_ipcp_opt_name(*p)); 3846 switch (p[0]) { 3847 case IPCP_OPT_ADDRESS: 3848 /* 3849 * Peer doesn't grok address option. This is 3850 * bad. XXX Should we better give up here? 3851 */ 3852 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS); 3853 break; 3854 #ifdef notyet 3855 case IPCP_OPT_COMPRESS: 3856 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_COMPRESS); 3857 break; 3858 #endif 3859 case IPCP_OPT_PRIMDNS: 3860 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS); 3861 break; 3862 3863 case IPCP_OPT_SECDNS: 3864 CLR(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS); 3865 break; 3866 } 3867 } 3868 if (debug) 3869 addlog("\n"); 3870 end: 3871 return; 3872 } 3873 3874 /* 3875 * Analyze the IPCP Configure-NAK option list, and adjust our 3876 * negotiation. 3877 */ 3878 static void 3879 sppp_ipcp_confnak(struct sppp *sp, struct lcp_header *h, int len) 3880 { 3881 u_char *p, l; 3882 struct ifnet *ifp = &sp->pp_if; 3883 int debug = ifp->if_flags & IFF_DEBUG; 3884 uint32_t wantaddr; 3885 3886 KASSERT(SPPP_WLOCKED(sp)); 3887 3888 len -= sizeof(*h); 3889 3890 if (debug) 3891 log(LOG_DEBUG, "%s: ipcp nak opts:", 3892 ifp->if_xname); 3893 3894 p = (void *)(h + 1); 3895 for (; len > 1; len -= l, p += l) { 3896 l = p[1]; 3897 if (l == 0) 3898 break; 3899 3900 /* Sanity check option length */ 3901 if (l > len) { 3902 /* XXX should we just RXJ? */ 3903 addlog("%s: malicious IPCP option received, dropping\n", 3904 ifp->if_xname); 3905 return; 3906 } 3907 if (debug) 3908 addlog(" %s", sppp_ipcp_opt_name(*p)); 3909 switch (*p) { 3910 case IPCP_OPT_ADDRESS: 3911 /* 3912 * Peer doesn't like our local IP address. See 3913 * if we can do something for him. We'll drop 3914 * him our address then. 3915 */ 3916 if (len >= 6 && l == 6) { 3917 wantaddr = p[2] << 24 | p[3] << 16 | 3918 p[4] << 8 | p[5]; 3919 SET(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS); 3920 if (debug) 3921 addlog(" [wantaddr %s]", 3922 sppp_dotted_quad(wantaddr)); 3923 /* 3924 * When doing dynamic address assignment, 3925 * we accept his offer. Otherwise, we 3926 * ignore it and thus continue to negotiate 3927 * our already existing value. 3928 */ 3929 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3930 if (ntohl(wantaddr) != INADDR_ANY) { 3931 if (debug) 3932 addlog(" [agree]"); 3933 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3934 sp->ipcp.req_myaddr = wantaddr; 3935 } else { 3936 if (debug) 3937 addlog(" [not agreed]"); 3938 } 3939 } 3940 } 3941 break; 3942 3943 case IPCP_OPT_PRIMDNS: 3944 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS) && 3945 len >= 6 && l == 6) { 3946 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3947 p[4] << 8 | p[5]; 3948 } 3949 break; 3950 3951 case IPCP_OPT_SECDNS: 3952 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS) && 3953 len >= 6 && l == 6) { 3954 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3955 p[4] << 8 | p[5]; 3956 } 3957 break; 3958 #ifdef notyet 3959 case IPCP_OPT_COMPRESS: 3960 /* 3961 * Peer wants different compression parameters. 3962 */ 3963 break; 3964 #endif 3965 } 3966 } 3967 if (debug) 3968 addlog("\n"); 3969 } 3970 3971 static void 3972 sppp_ipcp_tlu(struct sppp *sp) 3973 { 3974 #ifdef INET 3975 struct ifnet *ifp; 3976 3977 ifp = &sp->pp_if; 3978 KASSERT(SPPP_WLOCKED(sp)); 3979 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && 3980 ((sp->ipcp.flags & IPCP_MYADDR_SEEN) == 0)) { 3981 log(LOG_WARNING, "%s: no IP address, closing IPCP\n", 3982 ifp->if_xname); 3983 sppp_wq_add(sp->wq_cp, 3984 &sp->scp[IDX_IPCP].work_close); 3985 } else { 3986 /* we are up. Set addresses and notify anyone interested */ 3987 sppp_set_ip_addrs(sp); 3988 } 3989 #endif 3990 } 3991 3992 static void 3993 sppp_ipcp_scr(struct sppp *sp) 3994 { 3995 uint8_t opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3996 #ifdef INET 3997 uint32_t ouraddr; 3998 #endif 3999 int i = 0; 4000 4001 KASSERT(SPPP_WLOCKED(sp)); 4002 4003 #ifdef notyet 4004 if (ISSET(sp->ipcp.opts,SPPP_IPCP_OPT_COMPRESSION)) { 4005 opt[i++] = IPCP_OPT_COMPRESSION; 4006 opt[i++] = 6; 4007 opt[i++] = 0; /* VJ header compression */ 4008 opt[i++] = 0x2d; /* VJ header compression */ 4009 opt[i++] = max_slot_id; 4010 opt[i++] = comp_slot_id; 4011 } 4012 #endif 4013 4014 #ifdef INET 4015 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_ADDRESS)) { 4016 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) { 4017 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 4018 } else { 4019 kpreempt_disable(); 4020 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 4021 kpreempt_enable(); 4022 } 4023 opt[i++] = IPCP_OPT_ADDRESS; 4024 opt[i++] = 6; 4025 opt[i++] = ouraddr >> 24; 4026 opt[i++] = ouraddr >> 16; 4027 opt[i++] = ouraddr >> 8; 4028 opt[i++] = ouraddr; 4029 } 4030 #endif 4031 4032 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_PRIMDNS)) { 4033 opt[i++] = IPCP_OPT_PRIMDNS; 4034 opt[i++] = 6; 4035 opt[i++] = sp->dns_addrs[0] >> 24; 4036 opt[i++] = sp->dns_addrs[0] >> 16; 4037 opt[i++] = sp->dns_addrs[0] >> 8; 4038 opt[i++] = sp->dns_addrs[0]; 4039 } 4040 if (ISSET(sp->ipcp.opts, SPPP_IPCP_OPT_SECDNS)) { 4041 opt[i++] = IPCP_OPT_SECDNS; 4042 opt[i++] = 6; 4043 opt[i++] = sp->dns_addrs[1] >> 24; 4044 opt[i++] = sp->dns_addrs[1] >> 16; 4045 opt[i++] = sp->dns_addrs[1] >> 8; 4046 opt[i++] = sp->dns_addrs[1]; 4047 } 4048 4049 sp->scp[IDX_IPCP].confid = ++sp->scp[IDX_IPCP].seq; 4050 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->scp[IDX_IPCP].confid, i, &opt); 4051 } 4052 4053 /* 4054 *--------------------------------------------------------------------------* 4055 * * 4056 * The IPv6CP implementation. * 4057 * * 4058 *--------------------------------------------------------------------------* 4059 */ 4060 4061 #ifdef INET6 4062 static void 4063 sppp_ipv6cp_init(struct sppp *sp) 4064 { 4065 4066 KASSERT(SPPP_WLOCKED(sp)); 4067 4068 sppp_cp_init(&ipv6cp, sp); 4069 4070 sp->ipv6cp.opts = 0; 4071 sp->ipv6cp.flags = 0; 4072 } 4073 4074 static void 4075 sppp_ipv6cp_open(struct sppp *sp, void *xcp) 4076 { 4077 STDDCL; 4078 struct in6_addr myaddr, hisaddr; 4079 4080 KASSERT(SPPP_WLOCKED(sp)); 4081 KASSERT(!cpu_softintr_p()); 4082 4083 if (!ISSET(sp->pp_ncpflags, SPPP_NCP_IPV6CP)) 4084 return; 4085 4086 #ifdef IPV6CP_MYIFID_DYN 4087 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 4088 #else 4089 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 4090 #endif 4091 4092 kpreempt_disable(); 4093 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 4094 kpreempt_enable(); 4095 /* 4096 * If we don't have our address, this probably means our 4097 * interface doesn't want to talk IPv6 at all. (This could 4098 * be the case if somebody wants to speak only IPX, for 4099 * example.) Don't open IPv6CP in this case. 4100 */ 4101 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 4102 /* XXX this message should go away */ 4103 if (debug) 4104 log(LOG_DEBUG, "%s: ipv6cp_open(): no IPv6 interface\n", 4105 ifp->if_xname); 4106 return; 4107 } 4108 4109 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 4110 SET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID); 4111 sppp_open_event(sp, xcp); 4112 } 4113 4114 /* 4115 * Analyze a configure request. Return true if it was agreeable, and 4116 * caused action sca, false if it has been rejected or nak'ed, and 4117 * caused action scn. (The return value is used to make the state 4118 * transition decision in the state automaton.) 4119 */ 4120 static enum cp_rcr_type 4121 sppp_ipv6cp_confreq(struct sppp *sp, struct lcp_header *h, int origlen, 4122 uint8_t **msgbuf, size_t *buflen, size_t *msglen) 4123 { 4124 u_char *buf, *r, *p, l, blen; 4125 struct ifnet *ifp = &sp->pp_if; 4126 int rlen, len, debug = ifp->if_flags & IFF_DEBUG; 4127 struct in6_addr myaddr, desiredaddr, suggestaddr; 4128 enum cp_rcr_type type; 4129 int ifidcount; 4130 int collision, nohisaddr; 4131 char ip6buf[INET6_ADDRSTRLEN]; 4132 4133 KASSERT(SPPP_WLOCKED(sp)); 4134 4135 type = CP_RCR_NONE; 4136 origlen -= sizeof(*h); 4137 4138 if (origlen < 0) 4139 return CP_RCR_DROP; 4140 4141 /* 4142 * Make sure to allocate a buf that can at least hold a 4143 * conf-nak with an `address' option. We might need it below. 4144 */ 4145 blen = MAX(6, origlen); 4146 4147 buf = kmem_intr_alloc(blen, KM_NOSLEEP); 4148 if (buf == NULL) 4149 return CP_RCR_DROP; 4150 4151 /* pass 1: see if we can recognize them */ 4152 if (debug) 4153 log(LOG_DEBUG, "%s: ipv6cp parse opts:", 4154 ifp->if_xname); 4155 p = (void *)(h + 1); 4156 r = buf; 4157 rlen = 0; 4158 ifidcount = 0; 4159 for (len = origlen; len > 1; len -= l, p += l) { 4160 l = p[1]; 4161 if (l == 0) 4162 break; 4163 4164 /* Sanity check option length */ 4165 if (l > len) { 4166 /* XXX just RXJ? */ 4167 addlog("%s: received malicious IPCPv6 option, " 4168 "dropping\n", ifp->if_xname); 4169 type = CP_RCR_ERR; 4170 goto end; 4171 } 4172 if (debug) 4173 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4174 switch (p[0]) { 4175 case IPV6CP_OPT_IFID: 4176 if (len >= 10 && l == 10 && ifidcount == 0) { 4177 /* correctly formed address option */ 4178 ifidcount++; 4179 continue; 4180 } 4181 if (debug) 4182 addlog(" [invalid]"); 4183 break; 4184 #ifdef notyet 4185 case IPV6CP_OPT_COMPRESSION: 4186 if (len >= 4 && l >= 4) { 4187 /* correctly formed compress option */ 4188 continue; 4189 } 4190 if (debug) 4191 addlog(" [invalid]"); 4192 break; 4193 #endif 4194 default: 4195 /* Others not supported. */ 4196 if (debug) 4197 addlog(" [rej]"); 4198 break; 4199 } 4200 if (rlen + l > blen) { 4201 if (debug) 4202 addlog(" [overflow]"); 4203 continue; 4204 } 4205 /* Add the option to rejected list. */ 4206 memcpy(r, p, l); 4207 r += l; 4208 rlen += l; 4209 } 4210 4211 if (rlen > 0) { 4212 type = CP_RCR_REJ; 4213 goto end; 4214 } 4215 4216 if (debug) 4217 addlog("\n"); 4218 4219 /* pass 2: parse option values */ 4220 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4221 if (debug) 4222 log(LOG_DEBUG, "%s: ipv6cp parse opt values: ", 4223 ifp->if_xname); 4224 p = (void *)(h + 1); 4225 r = buf; 4226 rlen = 0; 4227 type = CP_RCR_ACK; 4228 for (len = origlen; len > 1; len -= l, p += l) { 4229 l = p[1]; 4230 if (l == 0) 4231 break; 4232 4233 if (debug) 4234 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4235 switch (p[0]) { 4236 #ifdef notyet 4237 case IPV6CP_OPT_COMPRESSION: 4238 continue; 4239 #endif 4240 case IPV6CP_OPT_IFID: 4241 memset(&desiredaddr, 0, sizeof(desiredaddr)); 4242 memcpy(&desiredaddr.s6_addr[8], &p[2], 8); 4243 collision = (memcmp(&desiredaddr.s6_addr[8], 4244 &myaddr.s6_addr[8], 8) == 0); 4245 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 4246 4247 desiredaddr.s6_addr16[0] = htons(0xfe80); 4248 (void)in6_setscope(&desiredaddr, &sp->pp_if, NULL); 4249 4250 if (!collision && !nohisaddr) { 4251 /* no collision, hisaddr known - Conf-Ack */ 4252 type = CP_RCR_ACK; 4253 memcpy(sp->ipv6cp.my_ifid, &myaddr.s6_addr[8], 4254 sizeof(sp->ipv6cp.my_ifid)); 4255 memcpy(sp->ipv6cp.his_ifid, 4256 &desiredaddr.s6_addr[8], 4257 sizeof(sp->ipv6cp.my_ifid)); 4258 4259 if (debug) { 4260 addlog(" %s [%s]", 4261 IN6_PRINT(ip6buf, &desiredaddr), 4262 sppp_cp_type_name(CONF_ACK)); 4263 } 4264 continue; 4265 } 4266 4267 memset(&suggestaddr, 0, sizeof(suggestaddr)); 4268 if (collision && nohisaddr) { 4269 /* collision, hisaddr unknown - Conf-Rej */ 4270 type = CP_RCR_REJ; 4271 memset(&p[2], 0, 8); 4272 } else { 4273 /* 4274 * - no collision, hisaddr unknown, or 4275 * - collision, hisaddr known 4276 * Conf-Nak, suggest hisaddr 4277 */ 4278 type = CP_RCR_NAK; 4279 sppp_suggest_ip6_addr(sp, &suggestaddr); 4280 memcpy(&p[2], &suggestaddr.s6_addr[8], 8); 4281 } 4282 if (debug) { 4283 int ctype = type == CP_RCR_REJ ? CONF_REJ : CONF_NAK; 4284 addlog(" %s [%s]", IN6_PRINT(ip6buf, &desiredaddr), 4285 sppp_cp_type_name(ctype)); 4286 } 4287 break; 4288 } 4289 if (rlen + l > blen) { 4290 if (debug) 4291 addlog(" [overflow]"); 4292 continue; 4293 } 4294 /* Add the option to nak'ed list. */ 4295 memcpy(r, p, l); 4296 r += l; 4297 rlen += l; 4298 } 4299 4300 if (rlen > 0) { 4301 if (type != CP_RCR_ACK) { 4302 if (debug) { 4303 int ctype ; 4304 ctype = type == CP_RCR_REJ ? 4305 CONF_REJ : CONF_NAK; 4306 addlog(" send %s suggest %s\n", 4307 sppp_cp_type_name(ctype), 4308 IN6_PRINT(ip6buf, &suggestaddr)); 4309 } 4310 } 4311 #ifdef notdef 4312 if (type == CP_RCR_ACK) 4313 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 4314 #endif 4315 } else { 4316 if (type == CP_RCR_ACK) { 4317 rlen = origlen; 4318 memcpy(r, h + 1, rlen); 4319 } 4320 } 4321 end: 4322 if (debug) 4323 addlog("\n"); 4324 4325 if (type == CP_RCR_ERR || type == CP_RCR_DROP) { 4326 if (buf != NULL) 4327 kmem_intr_free(buf, blen); 4328 } else { 4329 *msgbuf = buf; 4330 *buflen = blen; 4331 *msglen = rlen; 4332 } 4333 4334 return type; 4335 } 4336 4337 /* 4338 * Analyze the IPv6CP Configure-Reject option list, and adjust our 4339 * negotiation. 4340 */ 4341 static void 4342 sppp_ipv6cp_confrej(struct sppp *sp, struct lcp_header *h, int len) 4343 { 4344 u_char *p, l; 4345 struct ifnet *ifp = &sp->pp_if; 4346 int debug = ifp->if_flags & IFF_DEBUG; 4347 4348 KASSERT(SPPP_WLOCKED(sp)); 4349 4350 if (len <= sizeof(*h)) 4351 return; 4352 4353 len -= sizeof(*h); 4354 4355 if (debug) 4356 log(LOG_DEBUG, "%s: ipv6cp rej opts:", 4357 ifp->if_xname); 4358 4359 p = (void *)(h + 1); 4360 for (; len > 1; len -= l, p += l) { 4361 l = p[1]; 4362 if (l == 0) 4363 break; 4364 4365 if (l > len) { 4366 /* XXX just RXJ? */ 4367 addlog("%s: received malicious IPCPv6 option, " 4368 "dropping\n", ifp->if_xname); 4369 goto end; 4370 } 4371 if (debug) 4372 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4373 switch (p[0]) { 4374 case IPV6CP_OPT_IFID: 4375 /* 4376 * Peer doesn't grok address option. This is 4377 * bad. XXX Should we better give up here? 4378 */ 4379 CLR(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID); 4380 break; 4381 #ifdef notyet 4382 case IPV6CP_OPT_COMPRESS: 4383 CLR(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_COMPRESS); 4384 break; 4385 #endif 4386 } 4387 } 4388 if (debug) 4389 addlog("\n"); 4390 end: 4391 return; 4392 } 4393 4394 /* 4395 * Analyze the IPv6CP Configure-NAK option list, and adjust our 4396 * negotiation. 4397 */ 4398 static void 4399 sppp_ipv6cp_confnak(struct sppp *sp, struct lcp_header *h, int len) 4400 { 4401 u_char *p, l; 4402 struct ifnet *ifp = &sp->pp_if; 4403 int debug = ifp->if_flags & IFF_DEBUG; 4404 struct in6_addr suggestaddr; 4405 char ip6buf[INET6_ADDRSTRLEN]; 4406 4407 KASSERT(SPPP_WLOCKED(sp)); 4408 4409 if (len <= sizeof(*h)) 4410 return; 4411 4412 len -= sizeof(*h); 4413 4414 if (debug) 4415 log(LOG_DEBUG, "%s: ipv6cp nak opts:", 4416 ifp->if_xname); 4417 4418 p = (void *)(h + 1); 4419 for (; len > 1; len -= l, p += l) { 4420 l = p[1]; 4421 if (l == 0) 4422 break; 4423 4424 if (l > len) { 4425 /* XXX just RXJ? */ 4426 addlog("%s: received malicious IPCPv6 option, " 4427 "dropping\n", ifp->if_xname); 4428 goto end; 4429 } 4430 if (debug) 4431 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 4432 switch (p[0]) { 4433 case IPV6CP_OPT_IFID: 4434 /* 4435 * Peer doesn't like our local ifid. See 4436 * if we can do something for him. We'll drop 4437 * him our address then. 4438 */ 4439 if (len < 10 || l != 10) 4440 break; 4441 memset(&suggestaddr, 0, sizeof(suggestaddr)); 4442 suggestaddr.s6_addr16[0] = htons(0xfe80); 4443 (void)in6_setscope(&suggestaddr, &sp->pp_if, NULL); 4444 memcpy(&suggestaddr.s6_addr[8], &p[2], 8); 4445 4446 SET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID); 4447 if (debug) 4448 addlog(" [suggestaddr %s]", 4449 IN6_PRINT(ip6buf, &suggestaddr)); 4450 #ifdef IPV6CP_MYIFID_DYN 4451 /* 4452 * When doing dynamic address assignment, 4453 * we accept his offer. 4454 */ 4455 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 4456 struct in6_addr lastsuggest; 4457 /* 4458 * If <suggested myaddr from peer> equals to 4459 * <hisaddr we have suggested last time>, 4460 * we have a collision. generate new random 4461 * ifid. 4462 */ 4463 sppp_suggest_ip6_addr(&lastsuggest); 4464 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 4465 lastsuggest)) { 4466 if (debug) 4467 addlog(" [random]"); 4468 sppp_gen_ip6_addr(sp, &suggestaddr); 4469 } 4470 sppp_set_ip6_addr(sp, &suggestaddr, 0); 4471 if (debug) 4472 addlog(" [agree]"); 4473 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 4474 } 4475 #else 4476 /* 4477 * Since we do not do dynamic address assignment, 4478 * we ignore it and thus continue to negotiate 4479 * our already existing value. This can possibly 4480 * go into infinite request-reject loop. 4481 * 4482 * This is not likely because we normally use 4483 * ifid based on MAC-address. 4484 * If you have no ethernet card on the node, too bad. 4485 * XXX should we use fail_counter? 4486 */ 4487 #endif 4488 break; 4489 #ifdef notyet 4490 case IPV6CP_OPT_COMPRESS: 4491 /* 4492 * Peer wants different compression parameters. 4493 */ 4494 break; 4495 #endif 4496 } 4497 } 4498 if (debug) 4499 addlog("\n"); 4500 end: 4501 return; 4502 } 4503 4504 static void 4505 sppp_ipv6cp_tlu(struct sppp *sp) 4506 { 4507 4508 KASSERT(SPPP_WLOCKED(sp)); 4509 /* we are up - notify isdn daemon */ 4510 sppp_notify_con_wlocked(sp); 4511 } 4512 4513 static void 4514 sppp_ipv6cp_scr(struct sppp *sp) 4515 { 4516 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 4517 struct in6_addr ouraddr; 4518 int i = 0; 4519 4520 KASSERT(SPPP_WLOCKED(sp)); 4521 4522 if (ISSET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_IFID)) { 4523 kpreempt_disable(); 4524 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 4525 kpreempt_enable(); 4526 4527 opt[i++] = IPV6CP_OPT_IFID; 4528 opt[i++] = 10; 4529 memcpy(&opt[i], &ouraddr.s6_addr[8], 8); 4530 i += 8; 4531 } 4532 4533 #ifdef notyet 4534 if (ISSET(sp->ipv6cp.opts, SPPP_IPV6CP_OPT_COMPRESSION)) { 4535 opt[i++] = IPV6CP_OPT_COMPRESSION; 4536 opt[i++] = 4; 4537 opt[i++] = 0; /* TBD */ 4538 opt[i++] = 0; /* TBD */ 4539 /* variable length data may follow */ 4540 } 4541 #endif 4542 4543 sp->scp[IDX_IPV6CP].confid = ++sp->scp[IDX_IPV6CP].seq; 4544 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->scp[IDX_IPV6CP].confid, i, &opt); 4545 } 4546 #else /*INET6*/ 4547 static void 4548 sppp_ipv6cp_init(struct sppp *sp) 4549 { 4550 4551 KASSERT(SPPP_WLOCKED(sp)); 4552 } 4553 4554 static void 4555 sppp_ipv6cp_open(struct sppp *sp, void *xcp) 4556 { 4557 4558 KASSERT(SPPP_WLOCKED(sp)); 4559 } 4560 4561 static enum cp_rcr_type 4562 sppp_ipv6cp_confreq(struct sppp *sp, struct lcp_header *h, 4563 int len, uint8_t **msgbuf, size_t *buflen, size_t *msglen) 4564 { 4565 4566 KASSERT(SPPP_WLOCKED(sp)); 4567 return 0; 4568 } 4569 4570 static void 4571 sppp_ipv6cp_confrej(struct sppp *sp, struct lcp_header *h, 4572 int len) 4573 { 4574 4575 KASSERT(SPPP_WLOCKED(sp)); 4576 } 4577 4578 static void 4579 sppp_ipv6cp_confnak(struct sppp *sp, struct lcp_header *h, 4580 int len) 4581 { 4582 4583 KASSERT(SPPP_WLOCKED(sp)); 4584 } 4585 4586 static void 4587 sppp_ipv6cp_tlu(struct sppp *sp) 4588 { 4589 4590 KASSERT(SPPP_WLOCKED(sp)); 4591 } 4592 4593 static void 4594 sppp_ipv6cp_scr(struct sppp *sp) 4595 { 4596 4597 KASSERT(SPPP_WLOCKED(sp)); 4598 } 4599 #endif /*INET6*/ 4600 4601 /* 4602 *--------------------------------------------------------------------------* 4603 * * 4604 * The CHAP implementation. * 4605 * * 4606 *--------------------------------------------------------------------------* 4607 */ 4608 /* 4609 * The authentication protocols is implemented on the state machine for 4610 * control protocols. And it uses following actions and events. 4611 * 4612 * Actions: 4613 * - scr: send CHAP_CHALLENGE and CHAP_RESPONSE 4614 * - sca: send CHAP_SUCCESS 4615 * - scn: send CHAP_FAILURE and shutdown lcp 4616 * Events: 4617 * - RCR+: receive CHAP_RESPONSE containing correct digest 4618 * - RCR-: receive CHAP_RESPONSE containing wrong digest 4619 * - RCA: receive CHAP_SUCCESS 4620 * - RCN: (this event is unused) 4621 * - TO+: re-send CHAP_CHALLENGE and CHAP_RESPONSE 4622 * - TO-: this layer finish 4623 */ 4624 4625 /* 4626 * Handle incoming CHAP packets. 4627 */ 4628 void 4629 sppp_chap_input(struct sppp *sp, struct mbuf *m) 4630 { 4631 STDDCL; 4632 struct lcp_header *h; 4633 int len, x; 4634 u_char *value, *name, digest[sizeof(sp->chap.challenge)]; 4635 int value_len, name_len; 4636 MD5_CTX ctx; 4637 4638 len = m->m_pkthdr.len; 4639 if (len < 4) { 4640 if (debug) 4641 log(LOG_DEBUG, 4642 "%s: chap invalid packet length: %d bytes\n", 4643 ifp->if_xname, len); 4644 return; 4645 } 4646 h = mtod(m, struct lcp_header *); 4647 if (len > ntohs(h->len)) 4648 len = ntohs(h->len); 4649 4650 SPPP_LOCK(sp, RW_WRITER); 4651 4652 switch (h->type) { 4653 /* challenge, failure and success are his authproto */ 4654 case CHAP_CHALLENGE: 4655 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4656 /* can't do anything useful */ 4657 sp->pp_auth_failures++; 4658 printf("%s: chap input without my name and my secret being set\n", 4659 ifp->if_xname); 4660 break; 4661 } 4662 value = 1 + (u_char *)(h + 1); 4663 value_len = value[-1]; 4664 name = value + value_len; 4665 name_len = len - value_len - 5; 4666 if (name_len < 0) { 4667 if (debug) { 4668 log(LOG_DEBUG, 4669 "%s: chap corrupted challenge " 4670 "<%s id=0x%x len=%d", 4671 ifp->if_xname, 4672 sppp_auth_type_name(PPP_CHAP, h->type), 4673 h->ident, ntohs(h->len)); 4674 if (len > 4) 4675 sppp_print_bytes((u_char *)(h + 1), 4676 len - 4); 4677 addlog(">\n"); 4678 } 4679 break; 4680 } 4681 4682 if (debug) { 4683 log(LOG_DEBUG, 4684 "%s: chap input <%s id=0x%x len=%d name=", 4685 ifp->if_xname, 4686 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 4687 ntohs(h->len)); 4688 sppp_print_string((char *) name, name_len); 4689 addlog(" value-size=%d value=", value_len); 4690 sppp_print_bytes(value, value_len); 4691 addlog(">\n"); 4692 } 4693 4694 /* Compute reply value. */ 4695 MD5Init(&ctx); 4696 MD5Update(&ctx, &h->ident, 1); 4697 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 4698 MD5Update(&ctx, value, value_len); 4699 MD5Final(sp->chap.digest, &ctx); 4700 sp->chap.digest_len = sizeof(sp->chap.digest); 4701 sp->scp[IDX_CHAP].rconfid = h->ident; 4702 4703 sppp_wq_add(sp->wq_cp, &sp->chap.work_challenge_rcvd); 4704 break; 4705 4706 case CHAP_SUCCESS: 4707 if (debug) { 4708 log(LOG_DEBUG, "%s: chap success", 4709 ifp->if_xname); 4710 if (len > 4) { 4711 addlog(": "); 4712 sppp_print_string((char *)(h + 1), len - 4); 4713 } 4714 addlog("\n"); 4715 } 4716 4717 if (h->ident != sp->scp[IDX_CHAP].rconfid) { 4718 if (debug) { 4719 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4720 ifp->if_xname, chap.name, 4721 h->ident, sp->scp[IDX_CHAP].rconfid); 4722 } 4723 if_statinc(ifp, if_ierrors); 4724 break; 4725 } 4726 4727 if (sp->chap.digest_len == 0) { 4728 if (debug) { 4729 log(LOG_DEBUG, 4730 "%s: receive CHAP success without challenge\n", 4731 ifp->if_xname); 4732 } 4733 if_statinc(ifp, if_ierrors); 4734 break; 4735 } 4736 4737 x = splnet(); 4738 sp->pp_auth_failures = 0; 4739 sp->pp_flags &= ~PP_NEEDAUTH; 4740 splx(x); 4741 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4742 sp->chap.digest_len = 0; 4743 4744 if (!ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_SERV)) { 4745 /* 4746 * we are not authenticator for CHAP, 4747 * generate a dummy RCR+ event without CHAP_RESPONSE 4748 */ 4749 sp->scp[IDX_CHAP].rcr_type = CP_RCR_ACK; 4750 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4751 } 4752 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rca); 4753 break; 4754 4755 case CHAP_FAILURE: 4756 if (h->ident != sp->scp[IDX_CHAP].rconfid) { 4757 if (debug) { 4758 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 4759 ifp->if_xname, chap.name, 4760 h->ident, sp->scp[IDX_CHAP].rconfid); 4761 } 4762 if_statinc(ifp, if_ierrors); 4763 break; 4764 } 4765 4766 if (sp->chap.digest_len == 0) { 4767 if (debug) { 4768 log(LOG_DEBUG, 4769 "%s: receive CHAP failure without challenge\n", 4770 ifp->if_xname); 4771 } 4772 if_statinc(ifp, if_ierrors); 4773 break; 4774 } 4775 4776 x = splnet(); 4777 sp->pp_auth_failures++; 4778 splx(x); 4779 if (debug) { 4780 log(LOG_INFO, "%s: chap failure", 4781 ifp->if_xname); 4782 if (len > 4) { 4783 addlog(": "); 4784 sppp_print_string((char *)(h + 1), len - 4); 4785 } 4786 addlog("\n"); 4787 } else 4788 log(LOG_INFO, "%s: chap failure\n", 4789 ifp->if_xname); 4790 4791 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4792 sp->chap.digest_len = 0; 4793 /* 4794 * await LCP shutdown by authenticator, 4795 * so we don't have to enqueue sc->scp[IDX_CHAP].work_rcn 4796 */ 4797 break; 4798 4799 /* response is my authproto */ 4800 case CHAP_RESPONSE: 4801 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4802 /* can't do anything useful */ 4803 printf("%s: chap response" 4804 " without his name and his secret being set\n", 4805 ifp->if_xname); 4806 break; 4807 } 4808 value = 1 + (u_char *)(h + 1); 4809 value_len = value[-1]; 4810 name = value + value_len; 4811 name_len = len - value_len - 5; 4812 if (name_len < 0) { 4813 if (debug) { 4814 log(LOG_DEBUG, 4815 "%s: chap corrupted response " 4816 "<%s id=0x%x len=%d", 4817 ifp->if_xname, 4818 sppp_auth_type_name(PPP_CHAP, h->type), 4819 h->ident, ntohs(h->len)); 4820 if (len > 4) 4821 sppp_print_bytes((u_char *)(h + 1), 4822 len - 4); 4823 addlog(">\n"); 4824 } 4825 break; 4826 } 4827 if (h->ident != sp->scp[IDX_CHAP].confid) { 4828 if (debug) 4829 log(LOG_DEBUG, 4830 "%s: chap dropping response for old ID " 4831 "(got %d, expected %d)\n", 4832 ifp->if_xname, 4833 h->ident, sp->scp[IDX_CHAP].confid); 4834 break; 4835 } else { 4836 sp->scp[IDX_CHAP].rconfid = h->ident; 4837 } 4838 4839 if (sp->hisauth.name != NULL && 4840 (name_len != sp->hisauth.name_len 4841 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 4842 log(LOG_INFO, "%s: chap response, his name ", 4843 ifp->if_xname); 4844 sppp_print_string(name, name_len); 4845 addlog(" != expected "); 4846 sppp_print_string(sp->hisauth.name, 4847 sp->hisauth.name_len); 4848 addlog("\n"); 4849 4850 /* generate RCR- event */ 4851 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4852 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4853 break; 4854 } 4855 4856 if (debug) { 4857 log(LOG_DEBUG, "%s: chap input(%s) " 4858 "<%s id=0x%x len=%d name=", 4859 ifp->if_xname, 4860 sppp_state_name(sp->scp[IDX_CHAP].state), 4861 sppp_auth_type_name(PPP_CHAP, h->type), 4862 h->ident, ntohs(h->len)); 4863 sppp_print_string((char *)name, name_len); 4864 addlog(" value-size=%d value=", value_len); 4865 sppp_print_bytes(value, value_len); 4866 addlog(">\n"); 4867 } 4868 4869 if (value_len == sizeof(sp->chap.challenge) && 4870 value_len == sizeof(sp->chap.digest)) { 4871 MD5Init(&ctx); 4872 MD5Update(&ctx, &h->ident, 1); 4873 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 4874 MD5Update(&ctx, sp->chap.challenge, sizeof(sp->chap.challenge)); 4875 MD5Final(digest, &ctx); 4876 4877 if (memcmp(digest, value, value_len) == 0) { 4878 sp->scp[IDX_CHAP].rcr_type = CP_RCR_ACK; 4879 if (!ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_PEER) || 4880 sp->chap.rechallenging) { 4881 /* generate a dummy RCA event*/ 4882 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rca); 4883 } 4884 } else { 4885 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4886 } 4887 } else { 4888 if (debug) 4889 log(LOG_DEBUG, 4890 "%s: chap bad hash value length: " 4891 "%d bytes, should be %zu\n", 4892 ifp->if_xname, value_len, 4893 sizeof(sp->chap.challenge)); 4894 4895 sp->scp[IDX_CHAP].rcr_type = CP_RCR_NAK; 4896 } 4897 4898 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_CHAP].work_rcr); 4899 break; 4900 4901 default: 4902 /* Unknown CHAP packet type -- ignore. */ 4903 if (debug) { 4904 log(LOG_DEBUG, "%s: chap unknown input(%s) " 4905 "<0x%x id=0x%xh len=%d", 4906 ifp->if_xname, 4907 sppp_state_name(sp->scp[IDX_CHAP].state), 4908 h->type, h->ident, ntohs(h->len)); 4909 if (len > 4) 4910 sppp_print_bytes((u_char *)(h + 1), len - 4); 4911 addlog(">\n"); 4912 } 4913 break; 4914 4915 } 4916 4917 SPPP_UNLOCK(sp); 4918 } 4919 4920 static void 4921 sppp_chap_init(struct sppp *sp) 4922 { 4923 4924 KASSERT(SPPP_WLOCKED(sp)); 4925 4926 sppp_cp_init(&chap, sp); 4927 4928 SPPP_WQ_SET(&sp->chap.work_challenge_rcvd, 4929 sppp_chap_rcv_challenge_event, &chap); 4930 } 4931 4932 static void 4933 sppp_chap_open(struct sppp *sp, void *xcp) 4934 { 4935 4936 KASSERT(SPPP_WLOCKED(sp)); 4937 4938 memset(sp->chap.digest, 0, sizeof(sp->chap.digest)); 4939 sp->chap.digest_len = 0; 4940 sp->chap.rechallenging = false; 4941 sp->chap.response_rcvd = false; 4942 sppp_open_event(sp, xcp); 4943 } 4944 4945 static void 4946 sppp_chap_tlu(struct sppp *sp) 4947 { 4948 STDDCL; 4949 int i, x; 4950 4951 KASSERT(SPPP_WLOCKED(sp)); 4952 4953 i = 0; 4954 sp->scp[IDX_CHAP].rst_counter = sp->lcp.max_configure; 4955 x = splnet(); 4956 sp->pp_auth_failures = 0; 4957 splx(x); 4958 4959 log(LOG_DEBUG, "%s: chap %s", ifp->if_xname, 4960 sp->pp_phase == SPPP_PHASE_NETWORK ? "reconfirmed" : "tlu"); 4961 4962 /* 4963 * Some broken CHAP implementations (Conware CoNet, firmware 4964 * 4.0.?) don't want to re-authenticate their CHAP once the 4965 * initial challenge-response exchange has taken place. 4966 * Provide for an option to avoid rechallenges. 4967 */ 4968 if (ISSET(sppp_auth_role(&chap, sp), SPPP_AUTH_SERV) && 4969 (sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4970 /* 4971 * Compute the re-challenge timeout. This will yield 4972 * a number between 300 and 810 seconds. 4973 */ 4974 i = 300 + ((unsigned)(cprng_fast32() & 0xff00) >> 7); 4975 callout_schedule(&sp->scp[IDX_CHAP].ch, i * hz); 4976 4977 if (debug) { 4978 addlog(", next rechallenge in %d seconds", i); 4979 } 4980 } 4981 4982 addlog("\n"); 4983 4984 /* 4985 * If we are already in phase network, we are done here. This 4986 * is the case if this is a dummy tlu event after a re-challenge. 4987 */ 4988 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4989 sppp_phase_network(sp); 4990 } 4991 4992 static void 4993 sppp_chap_scr(struct sppp *sp) 4994 { 4995 uint32_t *ch; 4996 u_char clen, dsize; 4997 int role; 4998 4999 KASSERT(SPPP_WLOCKED(sp)); 5000 5001 role = sppp_auth_role(&chap, sp); 5002 5003 if (ISSET(role, SPPP_AUTH_SERV) && 5004 !sp->chap.response_rcvd) { 5005 /* we are authenticator for CHAP, send challenge */ 5006 ch = (uint32_t *)sp->chap.challenge; 5007 clen = sizeof(sp->chap.challenge); 5008 /* Compute random challenge. */ 5009 cprng_strong(kern_cprng, ch, clen, 0); 5010 5011 sp->scp[IDX_CHAP].confid = ++sp->scp[IDX_CHAP].seq; 5012 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->scp[IDX_CHAP].confid, 5013 sizeof(clen), (const char *)&clen, 5014 sizeof(sp->chap.challenge), sp->chap.challenge, 5015 0); 5016 } 5017 5018 if (ISSET(role, SPPP_AUTH_PEER) && 5019 sp->chap.digest_len > 0) { 5020 /* we are peer for CHAP, send response */ 5021 dsize = sp->chap.digest_len; 5022 5023 sppp_auth_send(&chap, sp, CHAP_RESPONSE, sp->scp[IDX_CHAP].rconfid, 5024 sizeof(dsize), (const char *)&dsize, 5025 sp->chap.digest_len, sp->chap.digest, 5026 sp->myauth.name_len, sp->myauth.name, 0); 5027 } 5028 } 5029 5030 static void 5031 sppp_chap_rcv_challenge_event(struct sppp *sp, void *xcp) 5032 { 5033 const struct cp *cp = xcp; 5034 5035 KASSERT(!cpu_softintr_p()); 5036 5037 sp->chap.rechallenging = false; 5038 5039 switch (sp->scp[IDX_CHAP].state) { 5040 case STATE_REQ_SENT: 5041 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 5042 cp->scr(sp); 5043 break; 5044 case STATE_OPENED: 5045 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 5046 cp->scr(sp); 5047 break; 5048 } 5049 } 5050 5051 /* 5052 *--------------------------------------------------------------------------* 5053 * * 5054 * The PAP implementation. * 5055 * * 5056 *--------------------------------------------------------------------------* 5057 */ 5058 /* 5059 * PAP uses following actions and events. 5060 * Actions: 5061 * - scr: send PAP_REQ 5062 * - sca: send PAP_ACK 5063 * - scn: send PAP_NAK 5064 * Events: 5065 * - RCR+: receive PAP_REQ containing correct username and password 5066 * - RCR-: receive PAP_REQ containing wrong username and password 5067 * - RCA: receive PAP_ACK 5068 * - RCN: (this event is unused) 5069 * - TO+: re-send PAP_REQ 5070 * - TO-: this layer finish 5071 */ 5072 5073 /* 5074 * Handle incoming PAP packets. */ 5075 static void 5076 sppp_pap_input(struct sppp *sp, struct mbuf *m) 5077 { 5078 STDDCL; 5079 struct lcp_header *h; 5080 int len, x; 5081 char *name, *secret; 5082 int name_len, secret_len; 5083 5084 /* 5085 * Malicious input might leave this uninitialized, so 5086 * init to an impossible value. 5087 */ 5088 secret_len = -1; 5089 5090 len = m->m_pkthdr.len; 5091 if (len < 5) { 5092 if (debug) 5093 log(LOG_DEBUG, 5094 "%s: pap invalid packet length: %d bytes\n", 5095 ifp->if_xname, len); 5096 return; 5097 } 5098 h = mtod(m, struct lcp_header *); 5099 if (len > ntohs(h->len)) 5100 len = ntohs(h->len); 5101 5102 SPPP_LOCK(sp, RW_WRITER); 5103 5104 switch (h->type) { 5105 /* PAP request is my authproto */ 5106 case PAP_REQ: 5107 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 5108 /* can't do anything useful */ 5109 printf("%s: pap request" 5110 " without his name and his secret being set\n", 5111 ifp->if_xname); 5112 break; 5113 } 5114 name = 1 + (u_char *)(h + 1); 5115 name_len = name[-1]; 5116 secret = name + name_len + 1; 5117 if (name_len > len - 6 || 5118 (secret_len = secret[-1]) > len - 6 - name_len) { 5119 if (debug) { 5120 log(LOG_DEBUG, "%s: pap corrupted input " 5121 "<%s id=0x%x len=%d", 5122 ifp->if_xname, 5123 sppp_auth_type_name(PPP_PAP, h->type), 5124 h->ident, ntohs(h->len)); 5125 if (len > 4) 5126 sppp_print_bytes((u_char *)(h + 1), 5127 len - 4); 5128 addlog(">\n"); 5129 } 5130 break; 5131 } 5132 if (debug) { 5133 log(LOG_DEBUG, "%s: pap input(%s) " 5134 "<%s id=0x%x len=%d name=", 5135 ifp->if_xname, 5136 sppp_state_name(sp->scp[IDX_PAP].state), 5137 sppp_auth_type_name(PPP_PAP, h->type), 5138 h->ident, ntohs(h->len)); 5139 sppp_print_string((char *)name, name_len); 5140 addlog(" secret="); 5141 sppp_print_string((char *)secret, secret_len); 5142 addlog(">\n"); 5143 } 5144 5145 sp->scp[IDX_PAP].rconfid = h->ident; 5146 5147 if (name_len == sp->hisauth.name_len && 5148 memcmp(name, sp->hisauth.name, name_len) == 0 && 5149 secret_len == sp->hisauth.secret_len && 5150 memcmp(secret, sp->hisauth.secret, secret_len) == 0) { 5151 sp->scp[IDX_PAP].rcr_type = CP_RCR_ACK; 5152 if (!ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_PEER)) { 5153 /* generate a dummy RCA event*/ 5154 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rca); 5155 } 5156 } else { 5157 sp->scp[IDX_PAP].rcr_type = CP_RCR_NAK; 5158 } 5159 5160 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rcr); 5161 break; 5162 5163 /* ack and nak are his authproto */ 5164 case PAP_ACK: 5165 if (debug) { 5166 log(LOG_DEBUG, "%s: pap success", 5167 ifp->if_xname); 5168 name = 1 + (u_char *)(h + 1); 5169 name_len = name[-1]; 5170 if (len > 5 && name_len < len+4) { 5171 addlog(": "); 5172 sppp_print_string(name, name_len); 5173 } 5174 addlog("\n"); 5175 } 5176 5177 if (h->ident != sp->scp[IDX_PAP].confid) { 5178 if (debug) { 5179 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 5180 ifp->if_xname, pap.name, 5181 h->ident, sp->scp[IDX_PAP].rconfid); 5182 } 5183 if_statinc(ifp, if_ierrors); 5184 break; 5185 } 5186 5187 x = splnet(); 5188 sp->pp_auth_failures = 0; 5189 sp->pp_flags &= ~PP_NEEDAUTH; 5190 splx(x); 5191 5192 /* we are not authenticator, generate a dummy RCR+ event */ 5193 if (!ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_SERV)) { 5194 sp->scp[IDX_PAP].rcr_type = CP_RCR_ACK; 5195 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rcr); 5196 } 5197 5198 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_PAP].work_rca); 5199 break; 5200 5201 case PAP_NAK: 5202 if (debug) { 5203 log(LOG_INFO, "%s: pap failure", 5204 ifp->if_xname); 5205 name = 1 + (u_char *)(h + 1); 5206 name_len = name[-1]; 5207 if (len > 5 && name_len < len+4) { 5208 addlog(": "); 5209 sppp_print_string(name, name_len); 5210 } 5211 addlog("\n"); 5212 } else 5213 log(LOG_INFO, "%s: pap failure\n", 5214 ifp->if_xname); 5215 5216 if (h->ident != sp->scp[IDX_PAP].confid) { 5217 if (debug) { 5218 log(LOG_DEBUG, "%s: %s id mismatch 0x%x != 0x%x\n", 5219 ifp->if_xname, pap.name, 5220 h->ident, sp->scp[IDX_PAP].rconfid); 5221 } 5222 if_statinc(ifp, if_ierrors); 5223 break; 5224 } 5225 5226 sp->pp_auth_failures++; 5227 /* 5228 * await LCP shutdown by authenticator, 5229 * so we don't have to enqueue sc->scp[IDX_PAP].work_rcn 5230 */ 5231 break; 5232 5233 default: 5234 /* Unknown PAP packet type -- ignore. */ 5235 if (debug) { 5236 log(LOG_DEBUG, "%s: pap corrupted input " 5237 "<0x%x id=0x%x len=%d", 5238 ifp->if_xname, 5239 h->type, h->ident, ntohs(h->len)); 5240 if (len > 4) 5241 sppp_print_bytes((u_char *)(h + 1), len - 4); 5242 addlog(">\n"); 5243 } 5244 break; 5245 } 5246 5247 SPPP_UNLOCK(sp); 5248 } 5249 5250 static void 5251 sppp_pap_init(struct sppp *sp) 5252 { 5253 5254 KASSERT(SPPP_WLOCKED(sp)); 5255 sppp_cp_init(&pap, sp); 5256 } 5257 5258 static void 5259 sppp_pap_tlu(struct sppp *sp) 5260 { 5261 STDDCL; 5262 int x; 5263 5264 sp->scp[IDX_PAP].rst_counter = sp->lcp.max_configure; 5265 5266 if (debug) 5267 log(LOG_DEBUG, "%s: %s tlu\n", 5268 ifp->if_xname, pap.name); 5269 5270 x = splnet(); 5271 sp->pp_auth_failures = 0; 5272 splx(x); 5273 5274 if (sp->pp_phase < SPPP_PHASE_NETWORK) 5275 sppp_phase_network(sp); 5276 } 5277 5278 static void 5279 sppp_pap_scr(struct sppp *sp) 5280 { 5281 u_char idlen, pwdlen; 5282 5283 KASSERT(SPPP_WLOCKED(sp)); 5284 5285 if (ISSET(sppp_auth_role(&pap, sp), SPPP_AUTH_PEER) && 5286 sp->scp[IDX_PAP].state != STATE_ACK_RCVD) { 5287 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 5288 log(LOG_DEBUG, "%s: couldn't send PAP_REQ " 5289 "because of no name or no secret\n", 5290 sp->pp_if.if_xname); 5291 } else { 5292 sp->scp[IDX_PAP].confid = ++sp->scp[IDX_PAP].seq; 5293 pwdlen = sp->myauth.secret_len; 5294 idlen = sp->myauth.name_len; 5295 5296 sppp_auth_send(&pap, sp, PAP_REQ, sp->scp[IDX_PAP].confid, 5297 sizeof idlen, (const char *)&idlen, 5298 idlen, sp->myauth.name, 5299 sizeof pwdlen, (const char *)&pwdlen, 5300 pwdlen, sp->myauth.secret, 5301 0); 5302 } 5303 } 5304 } 5305 5306 /* 5307 * Random miscellaneous functions. 5308 */ 5309 5310 /* 5311 * Send a PAP or CHAP proto packet. 5312 * 5313 * Varadic function, each of the elements for the ellipsis is of type 5314 * ``size_t mlen, const u_char *msg''. Processing will stop iff 5315 * mlen == 0. 5316 * NOTE: never declare variadic functions with types subject to type 5317 * promotion (i.e. u_char). This is asking for big trouble depending 5318 * on the architecture you are on... 5319 */ 5320 5321 static void 5322 sppp_auth_send(const struct cp *cp, struct sppp *sp, 5323 unsigned int type, unsigned int id, 5324 ...) 5325 { 5326 STDDCL; 5327 struct lcp_header *lh; 5328 struct mbuf *m; 5329 u_char *p; 5330 int len; 5331 size_t pkthdrlen; 5332 unsigned int mlen; 5333 const char *msg; 5334 va_list ap; 5335 5336 KASSERT(SPPP_WLOCKED(sp)); 5337 5338 MGETHDR(m, M_DONTWAIT, MT_DATA); 5339 if (! m) 5340 return; 5341 m_reset_rcvif(m); 5342 5343 if (sp->pp_flags & PP_NOFRAMING) { 5344 *mtod(m, uint16_t *) = htons(cp->proto); 5345 pkthdrlen = 2; 5346 lh = (struct lcp_header *)(mtod(m, uint8_t *)+2); 5347 } else { 5348 struct ppp_header *h; 5349 h = mtod(m, struct ppp_header *); 5350 h->address = PPP_ALLSTATIONS; /* broadcast address */ 5351 h->control = PPP_UI; /* Unnumbered Info */ 5352 h->protocol = htons(cp->proto); 5353 pkthdrlen = PPP_HEADER_LEN; 5354 5355 lh = (struct lcp_header *)(h + 1); 5356 } 5357 5358 lh->type = type; 5359 lh->ident = id; 5360 p = (u_char *)(lh + 1); 5361 5362 va_start(ap, id); 5363 len = 0; 5364 5365 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 5366 msg = va_arg(ap, const char *); 5367 len += mlen; 5368 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 5369 va_end(ap); 5370 m_freem(m); 5371 return; 5372 } 5373 5374 memcpy(p, msg, mlen); 5375 p += mlen; 5376 } 5377 va_end(ap); 5378 5379 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 5380 lh->len = htons(LCP_HEADER_LEN + len); 5381 5382 if (debug) { 5383 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 5384 ifp->if_xname, cp->name, 5385 sppp_auth_type_name(cp->proto, lh->type), 5386 lh->ident, ntohs(lh->len)); 5387 if (len) 5388 sppp_print_bytes((u_char *)(lh + 1), len); 5389 addlog(">\n"); 5390 } 5391 if (IF_QFULL(&sp->pp_cpq)) { 5392 IF_DROP(&sp->pp_fastq); 5393 IF_DROP(&ifp->if_snd); 5394 m_freem(m); 5395 if_statinc(ifp, if_oerrors); 5396 return; 5397 } 5398 5399 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 5400 IF_ENQUEUE(&sp->pp_cpq, m); 5401 5402 if (! (ifp->if_flags & IFF_OACTIVE)) { 5403 SPPP_UNLOCK(sp); 5404 if_start_lock(ifp); 5405 SPPP_LOCK(sp, RW_WRITER); 5406 } 5407 } 5408 5409 static int 5410 sppp_auth_role(const struct cp *cp, struct sppp *sp) 5411 { 5412 int role; 5413 5414 role = SPPP_AUTH_NOROLE; 5415 5416 if (sp->hisauth.proto == cp->proto && 5417 ISSET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO)) 5418 SET(role, SPPP_AUTH_SERV); 5419 5420 if (sp->myauth.proto == cp->proto) 5421 SET(role, SPPP_AUTH_PEER); 5422 5423 return role; 5424 } 5425 5426 static void 5427 sppp_auth_to_event(struct sppp *sp, void *xcp) 5428 { 5429 const struct cp *cp = xcp; 5430 bool override; 5431 int state; 5432 STDDCL; 5433 5434 KASSERT(SPPP_WLOCKED(sp)); 5435 KASSERT(!cpu_softintr_p()); 5436 5437 override = false; 5438 state = sp->scp[cp->protoidx].state; 5439 5440 if (sp->scp[cp->protoidx].rst_counter > 0) { 5441 /* override TO+ event */ 5442 switch (state) { 5443 case STATE_OPENED: 5444 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 5445 override = true; 5446 sp->chap.rechallenging = true; 5447 sp->chap.response_rcvd = false; 5448 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 5449 cp->scr(sp); 5450 } 5451 break; 5452 5453 case STATE_ACK_RCVD: 5454 override = true; 5455 cp->scr(sp); 5456 callout_schedule(&sp->scp[cp->protoidx].ch, sp->lcp.timeout); 5457 break; 5458 } 5459 } 5460 5461 if (override) { 5462 if (debug) 5463 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 5464 ifp->if_xname, cp->name, 5465 sppp_state_name(state), 5466 sp->scp[cp->protoidx].rst_counter); 5467 sp->scp[cp->protoidx].rst_counter--; 5468 } else { 5469 sppp_to_event(sp, xcp); 5470 } 5471 } 5472 5473 static void 5474 sppp_auth_screply(const struct cp *cp, struct sppp *sp, u_char ctype, 5475 uint8_t ident, size_t _mlen __unused, void *_msg __unused) 5476 { 5477 static const char *succmsg = "Welcome!"; 5478 static const char *failmsg = "Failed..."; 5479 const char *msg; 5480 u_char type, mlen; 5481 5482 KASSERT(SPPP_WLOCKED(sp)); 5483 5484 if (!ISSET(sppp_auth_role(cp, sp), SPPP_AUTH_SERV)) 5485 return; 5486 5487 if (ctype == CONF_ACK) { 5488 type = cp->proto == PPP_CHAP ? CHAP_SUCCESS : PAP_ACK; 5489 msg = succmsg; 5490 mlen = sizeof(succmsg) - 1; 5491 5492 sp->pp_auth_failures = 0; 5493 } else { 5494 type = cp->proto == PPP_CHAP ? CHAP_FAILURE : PAP_NAK; 5495 msg = failmsg; 5496 mlen = sizeof(failmsg) - 1; 5497 5498 /* shutdown LCP if auth failed */ 5499 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5500 sp->pp_auth_failures++; 5501 } 5502 5503 sppp_auth_send(cp, sp, type, ident, mlen, (const u_char *)msg, 0); 5504 } 5505 5506 /* 5507 * Send keepalive packets, every 10 seconds. 5508 */ 5509 static void 5510 sppp_keepalive(void *dummy) 5511 { 5512 struct sppp *sp; 5513 int s; 5514 time_t now; 5515 5516 SPPPQ_LOCK(); 5517 5518 s = splnet(); 5519 now = time_uptime; 5520 for (sp=spppq; sp; sp=sp->pp_next) { 5521 struct ifnet *ifp = NULL; 5522 5523 SPPP_LOCK(sp, RW_WRITER); 5524 ifp = &sp->pp_if; 5525 5526 /* check idle timeout */ 5527 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 5528 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 5529 /* idle timeout is enabled for this interface */ 5530 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 5531 if (ifp->if_flags & IFF_DEBUG) 5532 printf("%s: no activity for %lu seconds\n", 5533 sp->pp_if.if_xname, 5534 (unsigned long)(now-sp->pp_last_activity)); 5535 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5536 SPPP_UNLOCK(sp); 5537 continue; 5538 } 5539 } 5540 5541 /* Keepalive mode disabled or channel down? */ 5542 if (! (sp->pp_flags & PP_KEEPALIVE) || 5543 ! (ifp->if_flags & IFF_RUNNING)) { 5544 SPPP_UNLOCK(sp); 5545 continue; 5546 } 5547 5548 /* No keepalive in PPP mode if LCP not opened yet. */ 5549 if (! (sp->pp_flags & PP_CISCO) && 5550 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 5551 SPPP_UNLOCK(sp); 5552 continue; 5553 } 5554 5555 /* No echo reply, but maybe user data passed through? */ 5556 if ((now - sp->pp_last_receive) < sp->pp_max_noreceive) { 5557 sp->pp_alivecnt = 0; 5558 SPPP_UNLOCK(sp); 5559 continue; 5560 } 5561 5562 if (sp->pp_alivecnt >= sp->pp_maxalive) { 5563 /* No keepalive packets got. Stop the interface. */ 5564 sppp_wq_add(sp->wq_cp, &sp->work_ifdown); 5565 5566 if (! (sp->pp_flags & PP_CISCO)) { 5567 printf("%s: LCP keepalive timed out, going to restart the connection\n", 5568 ifp->if_xname); 5569 sp->pp_alivecnt = 0; 5570 5571 /* we are down, close all open protocols */ 5572 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_close); 5573 5574 /* And now prepare LCP to reestablish the link, if configured to do so. */ 5575 sp->lcp.reestablish = true; 5576 5577 SPPP_UNLOCK(sp); 5578 continue; 5579 } 5580 } 5581 if (sp->pp_alivecnt < sp->pp_maxalive) 5582 ++sp->pp_alivecnt; 5583 if (sp->pp_flags & PP_CISCO) 5584 sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ, 5585 ++sp->scp[IDX_LCP].seq, sp->scp[IDX_LCP].rseq); 5586 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 5587 int32_t nmagic = htonl(sp->lcp.magic); 5588 sp->lcp.echoid = ++sp->scp[IDX_LCP].seq; 5589 sppp_cp_send(sp, PPP_LCP, ECHO_REQ, 5590 sp->lcp.echoid, 4, &nmagic); 5591 } 5592 5593 SPPP_UNLOCK(sp); 5594 } 5595 splx(s); 5596 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 5597 5598 SPPPQ_UNLOCK(); 5599 } 5600 5601 #ifdef INET 5602 /* 5603 * Get both IP addresses. 5604 */ 5605 static void 5606 sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, uint32_t *srcmask) 5607 { 5608 struct ifnet *ifp = &sp->pp_if; 5609 struct ifaddr *ifa; 5610 struct sockaddr_in *si, *sm; 5611 uint32_t ssrc, ddst; 5612 int s; 5613 struct psref psref; 5614 5615 sm = NULL; 5616 ssrc = ddst = 0; 5617 /* 5618 * Pick the first AF_INET address from the list, 5619 * aliases don't make any sense on a p2p link anyway. 5620 */ 5621 si = 0; 5622 s = pserialize_read_enter(); 5623 IFADDR_READER_FOREACH(ifa, ifp) { 5624 if (ifa->ifa_addr->sa_family == AF_INET) { 5625 si = (struct sockaddr_in *)ifa->ifa_addr; 5626 sm = (struct sockaddr_in *)ifa->ifa_netmask; 5627 if (si) { 5628 ifa_acquire(ifa, &psref); 5629 break; 5630 } 5631 } 5632 } 5633 pserialize_read_exit(s); 5634 if (ifa) { 5635 if (si && si->sin_addr.s_addr) { 5636 ssrc = si->sin_addr.s_addr; 5637 if (srcmask) 5638 *srcmask = ntohl(sm->sin_addr.s_addr); 5639 } 5640 5641 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 5642 if (si && si->sin_addr.s_addr) 5643 ddst = si->sin_addr.s_addr; 5644 ifa_release(ifa, &psref); 5645 } 5646 5647 if (dst) *dst = ntohl(ddst); 5648 if (src) *src = ntohl(ssrc); 5649 } 5650 5651 /* 5652 * Set IP addresses. Must be called at splnet. 5653 * If an address is 0, leave it the way it is. 5654 */ 5655 static void 5656 sppp_set_ip_addrs(struct sppp *sp) 5657 { 5658 STDDCL; 5659 struct ifaddr *ifa; 5660 struct sockaddr_in *si, *dest; 5661 uint32_t myaddr = 0, hisaddr = 0; 5662 int s; 5663 5664 KASSERT(SPPP_WLOCKED(sp)); 5665 SPPP_UNLOCK(sp); 5666 IFNET_LOCK(ifp); 5667 SPPP_LOCK(sp, RW_WRITER); 5668 5669 /* 5670 * Pick the first AF_INET address from the list, 5671 * aliases don't make any sense on a p2p link anyway. 5672 */ 5673 si = dest = NULL; 5674 s = pserialize_read_enter(); 5675 IFADDR_READER_FOREACH(ifa, ifp) { 5676 if (ifa->ifa_addr->sa_family == AF_INET) { 5677 si = (struct sockaddr_in *)ifa->ifa_addr; 5678 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5679 break; 5680 } 5681 } 5682 pserialize_read_exit(s); 5683 5684 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 5685 myaddr = sp->ipcp.req_myaddr; 5686 else if (si != NULL) 5687 myaddr = ntohl(si->sin_addr.s_addr); 5688 5689 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 5690 hisaddr = sp->ipcp.req_hisaddr; 5691 else if (dest != NULL) 5692 hisaddr = ntohl(dest->sin_addr.s_addr); 5693 5694 if (si != NULL && dest != NULL) { 5695 int error; 5696 struct sockaddr_in new_sin = *si; 5697 struct sockaddr_in new_dst = *dest; 5698 5699 if (myaddr != 0) 5700 new_sin.sin_addr.s_addr = htonl(myaddr); 5701 if (hisaddr != 0) { 5702 new_dst.sin_addr.s_addr = htonl(hisaddr); 5703 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) 5704 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 5705 } 5706 5707 in_addrhash_remove(ifatoia(ifa)); 5708 5709 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5710 5711 in_addrhash_insert(ifatoia(ifa)); 5712 5713 if (debug && error) 5714 { 5715 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5716 ifp->if_xname, __func__, error); 5717 } 5718 if (!error) { 5719 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5720 } 5721 } 5722 5723 IFNET_UNLOCK(ifp); 5724 5725 sppp_notify_con(sp); 5726 } 5727 5728 /* 5729 * Clear IP addresses. Must be called at splnet. 5730 */ 5731 static void 5732 sppp_clear_ip_addrs(struct sppp *sp) 5733 { 5734 STDDCL; 5735 struct ifaddr *ifa; 5736 struct sockaddr_in *si, *dest; 5737 int s; 5738 5739 KASSERT(SPPP_WLOCKED(sp)); 5740 SPPP_UNLOCK(sp); 5741 IFNET_LOCK(ifp); 5742 SPPP_LOCK(sp, RW_WRITER); 5743 5744 /* 5745 * Pick the first AF_INET address from the list, 5746 * aliases don't make any sense on a p2p link anyway. 5747 */ 5748 si = dest = NULL; 5749 s = pserialize_read_enter(); 5750 IFADDR_READER_FOREACH(ifa, ifp) { 5751 if (ifa->ifa_addr->sa_family == AF_INET) { 5752 si = (struct sockaddr_in *)ifa->ifa_addr; 5753 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5754 break; 5755 } 5756 } 5757 pserialize_read_exit(s); 5758 5759 if (si != NULL) { 5760 struct sockaddr_in new_sin = *si; 5761 struct sockaddr_in new_dst = *dest; 5762 int error; 5763 5764 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 5765 new_sin.sin_addr.s_addr = 0; 5766 if (sp->ipcp.flags & IPCP_HISADDR_DYN && 5767 ntohl(sp->ipcp.saved_hisaddr) != 0) 5768 new_dst.sin_addr.s_addr = sp->ipcp.saved_hisaddr; 5769 5770 in_addrhash_remove(ifatoia(ifa)); 5771 5772 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5773 5774 in_addrhash_insert(ifatoia(ifa)); 5775 5776 if (debug && error) 5777 { 5778 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5779 ifp->if_xname, __func__, error); 5780 } 5781 if (!error) { 5782 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5783 } 5784 } 5785 5786 IFNET_UNLOCK(ifp); 5787 } 5788 #endif 5789 5790 #ifdef INET6 5791 /* 5792 * Get both IPv6 addresses. 5793 */ 5794 static void 5795 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 5796 struct in6_addr *srcmask) 5797 { 5798 struct ifnet *ifp = &sp->pp_if; 5799 struct ifaddr *ifa; 5800 struct sockaddr_in6 *si, *sm; 5801 struct in6_addr ssrc, ddst; 5802 int s; 5803 struct psref psref; 5804 5805 sm = NULL; 5806 memset(&ssrc, 0, sizeof(ssrc)); 5807 memset(&ddst, 0, sizeof(ddst)); 5808 /* 5809 * Pick the first link-local AF_INET6 address from the list, 5810 * aliases don't make any sense on a p2p link anyway. 5811 */ 5812 si = 0; 5813 s = pserialize_read_enter(); 5814 IFADDR_READER_FOREACH(ifa, ifp) { 5815 if (ifa->ifa_addr->sa_family == AF_INET6) { 5816 si = (struct sockaddr_in6 *)ifa->ifa_addr; 5817 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 5818 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) { 5819 ifa_acquire(ifa, &psref); 5820 break; 5821 } 5822 } 5823 } 5824 pserialize_read_exit(s); 5825 5826 if (ifa) { 5827 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 5828 memcpy(&ssrc, &si->sin6_addr, sizeof(ssrc)); 5829 if (srcmask) { 5830 memcpy(srcmask, &sm->sin6_addr, 5831 sizeof(*srcmask)); 5832 } 5833 } 5834 5835 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 5836 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 5837 memcpy(&ddst, &si->sin6_addr, sizeof(ddst)); 5838 ifa_release(ifa, &psref); 5839 } 5840 5841 if (dst) 5842 memcpy(dst, &ddst, sizeof(*dst)); 5843 if (src) 5844 memcpy(src, &ssrc, sizeof(*src)); 5845 } 5846 5847 #ifdef IPV6CP_MYIFID_DYN 5848 /* 5849 * Generate random ifid. 5850 */ 5851 static void 5852 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 5853 { 5854 /* TBD */ 5855 } 5856 5857 /* 5858 * Set my IPv6 address. Must be called at splnet. 5859 */ 5860 static void 5861 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 5862 { 5863 STDDCL; 5864 struct ifaddr *ifa; 5865 struct sockaddr_in6 *sin6; 5866 int s; 5867 struct psref psref; 5868 5869 KASSERT(SPPP_WLOCKED(sp)); 5870 SPPP_UNLOCK(sp); 5871 IFNET_LOCK(ifp); 5872 SPPP_LOCK(sp, RW_WRITER); 5873 5874 /* 5875 * Pick the first link-local AF_INET6 address from the list, 5876 * aliases don't make any sense on a p2p link anyway. 5877 */ 5878 5879 sin6 = NULL; 5880 s = pserialize_read_enter(); 5881 IFADDR_READER_FOREACH(ifa, ifp) 5882 { 5883 if (ifa->ifa_addr->sa_family == AF_INET6) 5884 { 5885 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 5886 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 5887 ifa_acquire(ifa, &psref); 5888 break; 5889 } 5890 } 5891 } 5892 pserialize_read_exit(s); 5893 5894 if (ifa && sin6) 5895 { 5896 int error; 5897 struct sockaddr_in6 new_sin6 = *sin6; 5898 5899 memcpy(&new_sin6.sin6_addr, src, sizeof(new_sin6.sin6_addr)); 5900 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 5901 if (debug && error) 5902 { 5903 log(LOG_DEBUG, "%s: %s: in6_ifinit failed, error=%d\n", 5904 ifp->if_xname, __func__, error); 5905 } 5906 if (!error) { 5907 pfil_run_addrhooks(if_pfil, SIOCAIFADDR_IN6, ifa); 5908 } 5909 ifa_release(ifa, &psref); 5910 } 5911 5912 IFNET_UNLOCK(ifp); 5913 } 5914 #endif 5915 5916 /* 5917 * Suggest a candidate address to be used by peer. 5918 */ 5919 static void 5920 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 5921 { 5922 struct in6_addr myaddr; 5923 struct timeval tv; 5924 5925 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 5926 5927 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 5928 microtime(&tv); 5929 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 5930 myaddr.s6_addr[14] ^= 0xff; 5931 myaddr.s6_addr[15] ^= 0xff; 5932 } else { 5933 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 5934 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 5935 } 5936 if (suggest) 5937 memcpy(suggest, &myaddr, sizeof(myaddr)); 5938 } 5939 #endif /*INET6*/ 5940 5941 /* 5942 * Process ioctl requests specific to the PPP interface. 5943 * Permissions have already been checked. 5944 */ 5945 static int 5946 sppp_params(struct sppp *sp, u_long cmd, void *data) 5947 { 5948 switch (cmd) { 5949 case SPPPGETAUTHCFG: 5950 { 5951 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5952 int error; 5953 size_t len; 5954 5955 SPPP_LOCK(sp, RW_READER); 5956 5957 cfg->myauthflags = sp->myauth.flags; 5958 cfg->hisauthflags = sp->hisauth.flags; 5959 strlcpy(cfg->ifname, sp->pp_if.if_xname, sizeof(cfg->ifname)); 5960 cfg->hisauth = 0; 5961 if (sp->hisauth.proto) 5962 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5963 cfg->myauth = 0; 5964 if (sp->myauth.proto) 5965 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5966 if (cfg->myname_length == 0) { 5967 if (sp->myauth.name != NULL) 5968 cfg->myname_length = sp->myauth.name_len + 1; 5969 } else { 5970 if (sp->myauth.name == NULL) { 5971 cfg->myname_length = 0; 5972 } else { 5973 len = sp->myauth.name_len + 1; 5974 5975 if (cfg->myname_length < len) { 5976 SPPP_UNLOCK(sp); 5977 return (ENAMETOOLONG); 5978 } 5979 error = copyout(sp->myauth.name, cfg->myname, len); 5980 if (error) { 5981 SPPP_UNLOCK(sp); 5982 return error; 5983 } 5984 } 5985 } 5986 if (cfg->hisname_length == 0) { 5987 if (sp->hisauth.name != NULL) 5988 cfg->hisname_length = sp->hisauth.name_len + 1; 5989 } else { 5990 if (sp->hisauth.name == NULL) { 5991 cfg->hisname_length = 0; 5992 } else { 5993 len = sp->hisauth.name_len + 1; 5994 5995 if (cfg->hisname_length < len) { 5996 SPPP_UNLOCK(sp); 5997 return (ENAMETOOLONG); 5998 } 5999 error = copyout(sp->hisauth.name, cfg->hisname, len); 6000 if (error) { 6001 SPPP_UNLOCK(sp); 6002 return error; 6003 } 6004 } 6005 } 6006 SPPP_UNLOCK(sp); 6007 } 6008 break; 6009 case SPPPSETAUTHCFG: 6010 { 6011 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 6012 int error; 6013 6014 SPPP_LOCK(sp, RW_WRITER); 6015 6016 if (sp->myauth.name) { 6017 free(sp->myauth.name, M_DEVBUF); 6018 sp->myauth.name = NULL; 6019 } 6020 if (sp->myauth.secret) { 6021 free(sp->myauth.secret, M_DEVBUF); 6022 sp->myauth.secret = NULL; 6023 } 6024 if (sp->hisauth.name) { 6025 free(sp->hisauth.name, M_DEVBUF); 6026 sp->hisauth.name = NULL; 6027 } 6028 if (sp->hisauth.secret) { 6029 free(sp->hisauth.secret, M_DEVBUF); 6030 sp->hisauth.secret = NULL; 6031 } 6032 6033 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 6034 if (cfg->hisname_length >= MCLBYTES) { 6035 SPPP_UNLOCK(sp); 6036 return (ENAMETOOLONG); 6037 } 6038 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 6039 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 6040 if (error) { 6041 free(sp->hisauth.name, M_DEVBUF); 6042 sp->hisauth.name = NULL; 6043 SPPP_UNLOCK(sp); 6044 return error; 6045 } 6046 sp->hisauth.name_len = cfg->hisname_length - 1; 6047 sp->hisauth.name[sp->hisauth.name_len] = 0; 6048 } 6049 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 6050 if (cfg->hissecret_length >= MCLBYTES) { 6051 SPPP_UNLOCK(sp); 6052 return (ENAMETOOLONG); 6053 } 6054 sp->hisauth.secret = malloc(cfg->hissecret_length, 6055 M_DEVBUF, M_WAITOK); 6056 error = copyin(cfg->hissecret, sp->hisauth.secret, 6057 cfg->hissecret_length); 6058 if (error) { 6059 free(sp->hisauth.secret, M_DEVBUF); 6060 sp->hisauth.secret = NULL; 6061 SPPP_UNLOCK(sp); 6062 return error; 6063 } 6064 sp->hisauth.secret_len = cfg->hissecret_length - 1; 6065 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 6066 } 6067 if (cfg->myname != NULL && cfg->myname_length > 0) { 6068 if (cfg->myname_length >= MCLBYTES) { 6069 SPPP_UNLOCK(sp); 6070 return (ENAMETOOLONG); 6071 } 6072 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 6073 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 6074 if (error) { 6075 free(sp->myauth.name, M_DEVBUF); 6076 sp->myauth.name = NULL; 6077 SPPP_UNLOCK(sp); 6078 return error; 6079 } 6080 sp->myauth.name_len = cfg->myname_length - 1; 6081 sp->myauth.name[sp->myauth.name_len] = 0; 6082 } 6083 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 6084 if (cfg->mysecret_length >= MCLBYTES) { 6085 SPPP_UNLOCK(sp); 6086 return (ENAMETOOLONG); 6087 } 6088 sp->myauth.secret = malloc(cfg->mysecret_length, 6089 M_DEVBUF, M_WAITOK); 6090 error = copyin(cfg->mysecret, sp->myauth.secret, 6091 cfg->mysecret_length); 6092 if (error) { 6093 free(sp->myauth.secret, M_DEVBUF); 6094 sp->myauth.secret = NULL; 6095 SPPP_UNLOCK(sp); 6096 return error; 6097 } 6098 sp->myauth.secret_len = cfg->mysecret_length - 1; 6099 sp->myauth.secret[sp->myauth.secret_len] = 0; 6100 } 6101 sp->myauth.flags = cfg->myauthflags; 6102 if (cfg->myauth) 6103 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 6104 sp->hisauth.flags = cfg->hisauthflags; 6105 if (cfg->hisauth) 6106 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 6107 sp->pp_auth_failures = 0; 6108 if (sp->hisauth.proto != 0) 6109 SET(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 6110 else 6111 CLR(sp->lcp.opts, SPPP_LCP_OPT_AUTH_PROTO); 6112 6113 SPPP_UNLOCK(sp); 6114 } 6115 break; 6116 case SPPPGETLCPCFG: 6117 { 6118 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 6119 6120 SPPP_LOCK(sp, RW_READER); 6121 lcpp->lcp_timeout = sp->lcp.timeout; 6122 SPPP_UNLOCK(sp); 6123 } 6124 break; 6125 case SPPPSETLCPCFG: 6126 { 6127 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 6128 6129 SPPP_LOCK(sp, RW_WRITER); 6130 sp->lcp.timeout = lcpp->lcp_timeout; 6131 SPPP_UNLOCK(sp); 6132 } 6133 break; 6134 case SPPPGETNCPCFG: 6135 { 6136 struct spppncpcfg *ncpp = (struct spppncpcfg *) data; 6137 6138 SPPP_LOCK(sp, RW_READER); 6139 ncpp->ncp_flags = sp->pp_ncpflags; 6140 SPPP_UNLOCK(sp); 6141 } 6142 break; 6143 case SPPPSETNCPCFG: 6144 { 6145 struct spppncpcfg *ncpp = (struct spppncpcfg *) data; 6146 6147 SPPP_LOCK(sp, RW_WRITER); 6148 sp->pp_ncpflags = ncpp->ncp_flags; 6149 SPPP_UNLOCK(sp); 6150 } 6151 break; 6152 case SPPPGETSTATUS: 6153 { 6154 struct spppstatus *status = (struct spppstatus *)data; 6155 6156 SPPP_LOCK(sp, RW_READER); 6157 status->phase = sp->pp_phase; 6158 SPPP_UNLOCK(sp); 6159 } 6160 break; 6161 case SPPPGETSTATUSNCP: 6162 { 6163 struct spppstatusncp *status = (struct spppstatusncp *)data; 6164 6165 SPPP_LOCK(sp, RW_READER); 6166 status->phase = sp->pp_phase; 6167 status->ncpup = sppp_cp_check(sp, CP_NCP); 6168 SPPP_UNLOCK(sp); 6169 } 6170 break; 6171 case SPPPGETIDLETO: 6172 { 6173 struct spppidletimeout *to = (struct spppidletimeout *)data; 6174 6175 SPPP_LOCK(sp, RW_READER); 6176 to->idle_seconds = sp->pp_idle_timeout; 6177 SPPP_UNLOCK(sp); 6178 } 6179 break; 6180 case SPPPSETIDLETO: 6181 { 6182 struct spppidletimeout *to = (struct spppidletimeout *)data; 6183 6184 SPPP_LOCK(sp, RW_WRITER); 6185 sp->pp_idle_timeout = to->idle_seconds; 6186 SPPP_UNLOCK(sp); 6187 } 6188 break; 6189 case SPPPSETAUTHFAILURE: 6190 { 6191 struct spppauthfailuresettings *afsettings = 6192 (struct spppauthfailuresettings *)data; 6193 6194 SPPP_LOCK(sp, RW_WRITER); 6195 sp->pp_max_auth_fail = afsettings->max_failures; 6196 sp->pp_auth_failures = 0; 6197 SPPP_UNLOCK(sp); 6198 } 6199 break; 6200 case SPPPGETAUTHFAILURES: 6201 { 6202 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 6203 6204 SPPP_LOCK(sp, RW_READER); 6205 stats->auth_failures = sp->pp_auth_failures; 6206 stats->max_failures = sp->pp_max_auth_fail; 6207 SPPP_UNLOCK(sp); 6208 } 6209 break; 6210 case SPPPSETDNSOPTS: 6211 { 6212 struct spppdnssettings *req = (struct spppdnssettings *)data; 6213 6214 SPPP_LOCK(sp, RW_WRITER); 6215 sp->query_dns = req->query_dns & 3; 6216 SPPP_UNLOCK(sp); 6217 } 6218 break; 6219 case SPPPGETDNSOPTS: 6220 { 6221 struct spppdnssettings *req = (struct spppdnssettings *)data; 6222 6223 SPPP_LOCK(sp, RW_READER); 6224 req->query_dns = sp->query_dns; 6225 SPPP_UNLOCK(sp); 6226 } 6227 break; 6228 case SPPPGETDNSADDRS: 6229 { 6230 struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data; 6231 6232 SPPP_LOCK(sp, RW_READER); 6233 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 6234 SPPP_UNLOCK(sp); 6235 } 6236 break; 6237 case SPPPGETKEEPALIVE: 6238 { 6239 struct spppkeepalivesettings *settings = 6240 (struct spppkeepalivesettings*)data; 6241 6242 SPPP_LOCK(sp, RW_READER); 6243 settings->maxalive = sp->pp_maxalive; 6244 settings->max_noreceive = sp->pp_max_noreceive; 6245 SPPP_UNLOCK(sp); 6246 } 6247 break; 6248 case SPPPSETKEEPALIVE: 6249 { 6250 struct spppkeepalivesettings *settings = 6251 (struct spppkeepalivesettings*)data; 6252 6253 SPPP_LOCK(sp, RW_WRITER); 6254 sp->pp_maxalive = settings->maxalive; 6255 sp->pp_max_noreceive = settings->max_noreceive; 6256 SPPP_UNLOCK(sp); 6257 } 6258 break; 6259 case SPPPGETLCPSTATUS: 6260 { 6261 struct sppplcpstatus *status = 6262 (struct sppplcpstatus *)data; 6263 6264 SPPP_LOCK(sp, RW_READER); 6265 status->state = sp->scp[IDX_LCP].state; 6266 status->opts = sp->lcp.opts; 6267 status->magic = sp->lcp.magic; 6268 status->mru = sp->lcp.mru; 6269 SPPP_UNLOCK(sp); 6270 } 6271 break; 6272 case SPPPGETIPCPSTATUS: 6273 { 6274 struct spppipcpstatus *status = 6275 (struct spppipcpstatus *)data; 6276 u_int32_t myaddr; 6277 6278 SPPP_LOCK(sp, RW_READER); 6279 status->state = sp->scp[IDX_IPCP].state; 6280 status->opts = sp->ipcp.opts; 6281 #ifdef INET 6282 kpreempt_disable(); 6283 sppp_get_ip_addrs(sp, &myaddr, 0, 0); 6284 kpreempt_enable(); 6285 #else 6286 myaddr = 0; 6287 #endif 6288 status->myaddr = ntohl(myaddr); 6289 SPPP_UNLOCK(sp); 6290 } 6291 break; 6292 case SPPPGETIPV6CPSTATUS: 6293 { 6294 struct spppipv6cpstatus *status = 6295 (struct spppipv6cpstatus *)data; 6296 6297 SPPP_LOCK(sp, RW_READER); 6298 status->state = sp->scp[IDX_IPV6CP].state; 6299 memcpy(status->my_ifid, sp->ipv6cp.my_ifid, 6300 sizeof(status->my_ifid)); 6301 memcpy(status->his_ifid, sp->ipv6cp.his_ifid, 6302 sizeof(status->his_ifid)); 6303 SPPP_UNLOCK(sp); 6304 } 6305 break; 6306 default: 6307 { 6308 int ret; 6309 6310 MODULE_HOOK_CALL(sppp_params_50_hook, (sp, cmd, data), 6311 enosys(), ret); 6312 if (ret != ENOSYS) 6313 return ret; 6314 return (EINVAL); 6315 } 6316 } 6317 return (0); 6318 } 6319 6320 static void 6321 sppp_phase_network(struct sppp *sp) 6322 { 6323 int i; 6324 6325 KASSERT(SPPP_WLOCKED(sp)); 6326 6327 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 6328 6329 /* Notify NCPs now. */ 6330 for (i = 0; i < IDX_COUNT; i++) 6331 if ((cps[i])->flags & CP_NCP) 6332 sppp_wq_add(sp->wq_cp, &sp->scp[i].work_open); 6333 } 6334 6335 static const char * 6336 sppp_cp_type_name(u_char type) 6337 { 6338 static char buf[12]; 6339 switch (type) { 6340 case CONF_REQ: return "conf-req"; 6341 case CONF_ACK: return "conf-ack"; 6342 case CONF_NAK: return "conf-nak"; 6343 case CONF_REJ: return "conf-rej"; 6344 case TERM_REQ: return "term-req"; 6345 case TERM_ACK: return "term-ack"; 6346 case CODE_REJ: return "code-rej"; 6347 case PROTO_REJ: return "proto-rej"; 6348 case ECHO_REQ: return "echo-req"; 6349 case ECHO_REPLY: return "echo-reply"; 6350 case DISC_REQ: return "discard-req"; 6351 } 6352 snprintf(buf, sizeof(buf), "0x%x", type); 6353 return buf; 6354 } 6355 6356 static const char * 6357 sppp_auth_type_name(u_short proto, u_char type) 6358 { 6359 static char buf[32]; 6360 const char *name; 6361 6362 switch (proto) { 6363 case PPP_CHAP: 6364 switch (type) { 6365 case CHAP_CHALLENGE: return "challenge"; 6366 case CHAP_RESPONSE: return "response"; 6367 case CHAP_SUCCESS: return "success"; 6368 case CHAP_FAILURE: return "failure"; 6369 default: name = "chap"; break; 6370 } 6371 break; 6372 6373 case PPP_PAP: 6374 switch (type) { 6375 case PAP_REQ: return "req"; 6376 case PAP_ACK: return "ack"; 6377 case PAP_NAK: return "nak"; 6378 default: name = "pap"; break; 6379 } 6380 break; 6381 6382 default: 6383 name = "bad"; 6384 break; 6385 } 6386 6387 snprintf(buf, sizeof(buf), "%s(%#x) %#x", name, proto, type); 6388 return buf; 6389 } 6390 6391 static const char * 6392 sppp_lcp_opt_name(u_char opt) 6393 { 6394 static char buf[12]; 6395 switch (opt) { 6396 case LCP_OPT_MRU: return "mru"; 6397 case LCP_OPT_ASYNC_MAP: return "async-map"; 6398 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 6399 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 6400 case LCP_OPT_MAGIC: return "magic"; 6401 case LCP_OPT_PROTO_COMP: return "proto-comp"; 6402 case LCP_OPT_ADDR_COMP: return "addr-comp"; 6403 case LCP_OPT_SELF_DESC_PAD: return "sdpad"; 6404 case LCP_OPT_CALL_BACK: return "callback"; 6405 case LCP_OPT_COMPOUND_FRMS: return "cmpd-frms"; 6406 case LCP_OPT_MP_MRRU: return "mrru"; 6407 case LCP_OPT_MP_SSNHF: return "mp-ssnhf"; 6408 case LCP_OPT_MP_EID: return "mp-eid"; 6409 } 6410 snprintf(buf, sizeof(buf), "0x%x", opt); 6411 return buf; 6412 } 6413 6414 static const char * 6415 sppp_ipcp_opt_name(u_char opt) 6416 { 6417 static char buf[12]; 6418 switch (opt) { 6419 case IPCP_OPT_ADDRESSES: return "addresses"; 6420 case IPCP_OPT_COMPRESSION: return "compression"; 6421 case IPCP_OPT_ADDRESS: return "address"; 6422 case IPCP_OPT_PRIMDNS: return "primdns"; 6423 case IPCP_OPT_SECDNS: return "secdns"; 6424 } 6425 snprintf(buf, sizeof(buf), "0x%x", opt); 6426 return buf; 6427 } 6428 6429 #ifdef INET6 6430 static const char * 6431 sppp_ipv6cp_opt_name(u_char opt) 6432 { 6433 static char buf[12]; 6434 switch (opt) { 6435 case IPV6CP_OPT_IFID: return "ifid"; 6436 case IPV6CP_OPT_COMPRESSION: return "compression"; 6437 } 6438 snprintf(buf, sizeof(buf), "0x%x", opt); 6439 return buf; 6440 } 6441 #endif 6442 6443 static const char * 6444 sppp_state_name(int state) 6445 { 6446 switch (state) { 6447 case STATE_INITIAL: return "initial"; 6448 case STATE_STARTING: return "starting"; 6449 case STATE_CLOSED: return "closed"; 6450 case STATE_STOPPED: return "stopped"; 6451 case STATE_CLOSING: return "closing"; 6452 case STATE_STOPPING: return "stopping"; 6453 case STATE_REQ_SENT: return "req-sent"; 6454 case STATE_ACK_RCVD: return "ack-rcvd"; 6455 case STATE_ACK_SENT: return "ack-sent"; 6456 case STATE_OPENED: return "opened"; 6457 } 6458 return "illegal"; 6459 } 6460 6461 static const char * 6462 sppp_phase_name(int phase) 6463 { 6464 switch (phase) { 6465 case SPPP_PHASE_DEAD: return "dead"; 6466 case SPPP_PHASE_ESTABLISH: return "establish"; 6467 case SPPP_PHASE_TERMINATE: return "terminate"; 6468 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 6469 case SPPP_PHASE_NETWORK: return "network"; 6470 } 6471 return "illegal"; 6472 } 6473 6474 static const char * 6475 sppp_proto_name(u_short proto) 6476 { 6477 static char buf[12]; 6478 switch (proto) { 6479 case PPP_LCP: return "lcp"; 6480 case PPP_IPCP: return "ipcp"; 6481 case PPP_PAP: return "pap"; 6482 case PPP_CHAP: return "chap"; 6483 case PPP_IPV6CP: return "ipv6cp"; 6484 } 6485 snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto); 6486 return buf; 6487 } 6488 6489 static void 6490 sppp_print_bytes(const u_char *p, u_short len) 6491 { 6492 addlog(" %02x", *p++); 6493 while (--len > 0) 6494 addlog("-%02x", *p++); 6495 } 6496 6497 static void 6498 sppp_print_string(const char *p, u_short len) 6499 { 6500 u_char c; 6501 6502 while (len-- > 0) { 6503 c = *p++; 6504 /* 6505 * Print only ASCII chars directly. RFC 1994 recommends 6506 * using only them, but we don't rely on it. */ 6507 if (c < ' ' || c > '~') 6508 addlog("\\x%x", c); 6509 else 6510 addlog("%c", c); 6511 } 6512 } 6513 6514 static const char * 6515 sppp_dotted_quad(uint32_t addr) 6516 { 6517 static char s[16]; 6518 snprintf(s, sizeof(s), "%d.%d.%d.%d", 6519 (int)((addr >> 24) & 0xff), 6520 (int)((addr >> 16) & 0xff), 6521 (int)((addr >> 8) & 0xff), 6522 (int)(addr & 0xff)); 6523 return s; 6524 } 6525 6526 /* a dummy, used to drop uninteresting events */ 6527 static void 6528 sppp_null(struct sppp *unused) 6529 { 6530 /* do just nothing */ 6531 } 6532 6533 static void 6534 sppp_tls(const struct cp *cp, struct sppp *sp) 6535 { 6536 6537 /* notify lcp that is lower layer */ 6538 sp->lcp.protos |= (1 << cp->protoidx); 6539 6540 if (sp->scp[IDX_LCP].state == STATE_OPENED) 6541 sppp_wq_add(sp->wq_cp, &sp->scp[cp->protoidx].work_up); 6542 } 6543 6544 static void 6545 sppp_tlf(const struct cp *cp, struct sppp *sp) 6546 { 6547 STDDCL; 6548 6549 if (debug) 6550 log(LOG_DEBUG, "%s: %s tlf\n", ifp->if_xname, cp->name); 6551 6552 /* notify lcp that is lower layer */ 6553 sp->lcp.protos &= ~(1 << cp->protoidx); 6554 6555 /* cleanup */ 6556 if (sp->scp[cp->protoidx].mbuf_confreq != NULL) { 6557 m_freem(sp->scp[cp->protoidx].mbuf_confreq); 6558 sp->scp[cp->protoidx].mbuf_confreq = NULL; 6559 } 6560 if (sp->scp[cp->protoidx].mbuf_confnak != NULL) { 6561 m_freem(sp->scp[cp->protoidx].mbuf_confnak); 6562 sp->scp[cp->protoidx].mbuf_confnak = NULL; 6563 } 6564 6565 sppp_lcp_check_and_close(sp); 6566 } 6567 6568 static void 6569 sppp_screply(const struct cp *cp, struct sppp *sp, u_char type, 6570 uint8_t ident, size_t msglen, void *msg) 6571 { 6572 STDDCL; 6573 6574 if (msglen == 0) 6575 return; 6576 6577 switch (type) { 6578 case CONF_ACK: 6579 case CONF_NAK: 6580 case CONF_REJ: 6581 break; 6582 default: 6583 return; 6584 } 6585 6586 if (debug) { 6587 log(LOG_DEBUG, "%s: send %s\n", 6588 ifp->if_xname, sppp_cp_type_name(type)); 6589 } 6590 6591 sppp_cp_send(sp, cp->proto, type, ident, msglen, msg); 6592 } 6593 6594 static void 6595 sppp_ifdown(struct sppp *sp, void *xcp __unused) 6596 { 6597 6598 SPPP_UNLOCK(sp); 6599 if_down(&sp->pp_if); 6600 IF_PURGE(&sp->pp_cpq); 6601 SPPP_LOCK(sp, RW_WRITER); 6602 } 6603 6604 static void 6605 sppp_notify_up(struct sppp *sp) 6606 { 6607 6608 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_up); 6609 } 6610 6611 static void 6612 sppp_notify_down(struct sppp *sp) 6613 { 6614 6615 sppp_wq_add(sp->wq_cp, &sp->scp[IDX_LCP].work_down); 6616 } 6617 6618 static void 6619 sppp_notify_tls_wlocked(struct sppp *sp) 6620 { 6621 6622 KASSERT(SPPP_WLOCKED(sp)); 6623 6624 if (!sp->pp_tls) 6625 return; 6626 6627 SPPP_UNLOCK(sp); 6628 sp->pp_tls(sp); 6629 SPPP_LOCK(sp, RW_WRITER); 6630 } 6631 6632 static void 6633 sppp_notify_tlf_wlocked(struct sppp *sp) 6634 { 6635 6636 KASSERT(SPPP_WLOCKED(sp)); 6637 6638 if (!sp->pp_tlf) 6639 return; 6640 6641 SPPP_UNLOCK(sp); 6642 sp->pp_tlf(sp); 6643 SPPP_LOCK(sp, RW_WRITER); 6644 } 6645 6646 static void 6647 sppp_notify_con(struct sppp *sp) 6648 { 6649 6650 if (!sp->pp_con) 6651 return; 6652 6653 sp->pp_con(sp); 6654 } 6655 6656 #ifdef INET6 6657 static void 6658 sppp_notify_con_wlocked(struct sppp *sp) 6659 { 6660 6661 KASSERT(SPPP_WLOCKED(sp)); 6662 6663 SPPP_UNLOCK(sp); 6664 sppp_notify_con(sp); 6665 SPPP_LOCK(sp, RW_WRITER); 6666 6667 } 6668 #endif 6669 6670 static void 6671 sppp_notify_chg_wlocked(struct sppp *sp) 6672 { 6673 6674 KASSERT(SPPP_WLOCKED(sp)); 6675 6676 if (!sp->pp_chg) 6677 return; 6678 6679 SPPP_UNLOCK(sp); 6680 sp->pp_chg(sp, sp->pp_phase); 6681 SPPP_LOCK(sp, RW_WRITER); 6682 } 6683 6684 static void 6685 sppp_wq_work(struct work *wk, void *xsp) 6686 { 6687 struct sppp *sp; 6688 struct sppp_work *work; 6689 6690 sp = xsp; 6691 work = container_of(wk, struct sppp_work, work); 6692 atomic_cas_uint(&work->state, SPPP_WK_BUSY, SPPP_WK_FREE); 6693 6694 SPPP_LOCK(sp, RW_WRITER); 6695 work->func(sp, work->arg); 6696 SPPP_UNLOCK(sp); 6697 } 6698 6699 static struct workqueue * 6700 sppp_wq_create(struct sppp *sp, const char *xnamebuf, pri_t prio, int ipl, int flags) 6701 { 6702 struct workqueue *wq; 6703 int error; 6704 6705 error = workqueue_create(&wq, xnamebuf, sppp_wq_work, 6706 (void *)sp, prio, ipl, flags); 6707 if (error) { 6708 panic("%s: workqueue_create failed [%s, %d]\n", 6709 sp->pp_if.if_xname, xnamebuf, error); 6710 } 6711 6712 return wq; 6713 } 6714 6715 static void 6716 sppp_wq_destroy(struct sppp *sp __unused, struct workqueue *wq) 6717 { 6718 6719 workqueue_destroy(wq); 6720 } 6721 6722 static void 6723 sppp_wq_set(struct sppp_work *work, 6724 void (*func)(struct sppp *, void *), void *arg) 6725 { 6726 6727 work->func = func; 6728 work->arg = arg; 6729 } 6730 6731 static void 6732 sppp_wq_add(struct workqueue *wq, struct sppp_work *work) 6733 { 6734 6735 if (atomic_cas_uint(&work->state, SPPP_WK_FREE, SPPP_WK_BUSY) 6736 != SPPP_WK_FREE) 6737 return; 6738 6739 KASSERT(work->func != NULL); 6740 kpreempt_disable(); 6741 workqueue_enqueue(wq, &work->work, NULL); 6742 kpreempt_enable(); 6743 } 6744 static void 6745 sppp_wq_wait(struct workqueue *wq, struct sppp_work *work) 6746 { 6747 6748 atomic_swap_uint(&work->state, SPPP_WK_UNAVAIL); 6749 workqueue_wait(wq, &work->work); 6750 } 6751 6752 /* 6753 * This file is large. Tell emacs to highlight it nevertheless. 6754 * 6755 * Local Variables: 6756 * hilit-auto-highlight-maxout: 120000 6757 * End: 6758 */ 6759 6760 /* 6761 * Module glue 6762 */ 6763 MODULE(MODULE_CLASS_MISC, sppp_subr, NULL); 6764 6765 static int 6766 sppp_subr_modcmd(modcmd_t cmd, void *arg) 6767 { 6768 6769 switch (cmd) { 6770 case MODULE_CMD_INIT: 6771 case MODULE_CMD_FINI: 6772 return 0; 6773 case MODULE_CMD_STAT: 6774 case MODULE_CMD_AUTOUNLOAD: 6775 default: 6776 return ENOTTY; 6777 } 6778 } 6779
Indexes created Tue Oct 14 11:09:46 GMT 2025