1 /* $NetBSD: if_spppsubr.c,v 1.188 2020/04/01 20:24:50 is 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@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@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 1.188 2020/04/01 20:24:50 is Exp $"); 45 46 #if defined(_KERNEL_OPT) 47 #include "opt_inet.h" 48 #include "opt_modular.h" 49 #include "opt_compat_netbsd.h" 50 #include "opt_net_mpsafe.h" 51 #endif 52 53 54 #include <sys/param.h> 55 #include <sys/proc.h> 56 #include <sys/systm.h> 57 #include <sys/kernel.h> 58 #include <sys/sockio.h> 59 #include <sys/socket.h> 60 #include <sys/syslog.h> 61 #include <sys/malloc.h> 62 #include <sys/mbuf.h> 63 #include <sys/callout.h> 64 #include <sys/md5.h> 65 #include <sys/inttypes.h> 66 #include <sys/kauth.h> 67 #include <sys/cprng.h> 68 #include <sys/module.h> 69 #include <sys/workqueue.h> 70 #include <sys/atomic.h> 71 #include <sys/compat_stub.h> 72 73 #include <net/if.h> 74 #include <net/netisr.h> 75 #include <net/if_types.h> 76 #include <net/route.h> 77 #include <net/ppp_defs.h> 78 79 #include <netinet/in.h> 80 #include <netinet/in_systm.h> 81 #include <netinet/in_var.h> 82 #ifdef INET 83 #include <netinet/ip.h> 84 #include <netinet/tcp.h> 85 #endif 86 #include <net/ethertypes.h> 87 88 #ifdef INET6 89 #include <netinet6/scope6_var.h> 90 #endif 91 92 #include <net/if_sppp.h> 93 #include <net/if_spppvar.h> 94 95 #ifdef NET_MPSAFE 96 #define SPPPSUBR_MPSAFE 1 97 #endif 98 99 #define LCP_KEEPALIVE_INTERVAL 10 /* seconds between checks */ 100 #define LOOPALIVECNT 3 /* loopback detection tries */ 101 #define DEFAULT_MAXALIVECNT 3 /* max. missed alive packets */ 102 #define DEFAULT_NORECV_TIME 15 /* before we get worried */ 103 #define DEFAULT_MAX_AUTH_FAILURES 5 /* max. auth. failures */ 104 105 /* 106 * Interface flags that can be set in an ifconfig command. 107 * 108 * Setting link0 will make the link passive, i.e. it will be marked 109 * as being administrative openable, but won't be opened to begin 110 * with. Incoming calls will be answered, or subsequent calls with 111 * -link1 will cause the administrative open of the LCP layer. 112 * 113 * Setting link1 will cause the link to auto-dial only as packets 114 * arrive to be sent. 115 * 116 * Setting IFF_DEBUG will syslog the option negotiation and state 117 * transitions at level kern.debug. Note: all logs consistently look 118 * like 119 * 120 * <if-name><unit>: <proto-name> <additional info...> 121 * 122 * with <if-name><unit> being something like "bppp0", and <proto-name> 123 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc. 124 */ 125 126 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ 127 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */ 128 129 #define CONF_REQ 1 /* PPP configure request */ 130 #define CONF_ACK 2 /* PPP configure acknowledge */ 131 #define CONF_NAK 3 /* PPP configure negative ack */ 132 #define CONF_REJ 4 /* PPP configure reject */ 133 #define TERM_REQ 5 /* PPP terminate request */ 134 #define TERM_ACK 6 /* PPP terminate acknowledge */ 135 #define CODE_REJ 7 /* PPP code reject */ 136 #define PROTO_REJ 8 /* PPP protocol reject */ 137 #define ECHO_REQ 9 /* PPP echo request */ 138 #define ECHO_REPLY 10 /* PPP echo reply */ 139 #define DISC_REQ 11 /* PPP discard request */ 140 141 #define LCP_OPT_MRU 1 /* maximum receive unit */ 142 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */ 143 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ 144 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ 145 #define LCP_OPT_MAGIC 5 /* magic number */ 146 #define LCP_OPT_RESERVED 6 /* reserved */ 147 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ 148 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ 149 #define LCP_OPT_FCS_ALTS 9 /* FCS alternatives */ 150 #define LCP_OPT_SELF_DESC_PAD 10 /* self-describing padding */ 151 #define LCP_OPT_CALL_BACK 13 /* callback */ 152 #define LCP_OPT_COMPOUND_FRMS 15 /* compound frames */ 153 #define LCP_OPT_MP_MRRU 17 /* multilink MRRU */ 154 #define LCP_OPT_MP_SSNHF 18 /* multilink short seq. numbers */ 155 #define LCP_OPT_MP_EID 19 /* multilink endpoint discriminator */ 156 157 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ 158 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol */ 159 #define IPCP_OPT_ADDRESS 3 /* local IP address */ 160 #define IPCP_OPT_PRIMDNS 129 /* primary remote dns address */ 161 #define IPCP_OPT_SECDNS 131 /* secondary remote dns address */ 162 163 #define IPCP_UPDATE_LIMIT 8 /* limit of pending IP updating job */ 164 #define IPCP_SET_ADDRS 1 /* marker for IP address setting job */ 165 #define IPCP_CLEAR_ADDRS 2 /* marker for IP address clearing job */ 166 167 #define IPV6CP_OPT_IFID 1 /* interface identifier */ 168 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ 169 170 #define PAP_REQ 1 /* PAP name/password request */ 171 #define PAP_ACK 2 /* PAP acknowledge */ 172 #define PAP_NAK 3 /* PAP fail */ 173 174 #define CHAP_CHALLENGE 1 /* CHAP challenge request */ 175 #define CHAP_RESPONSE 2 /* CHAP challenge response */ 176 #define CHAP_SUCCESS 3 /* CHAP response ok */ 177 #define CHAP_FAILURE 4 /* CHAP response failed */ 178 179 #define CHAP_MD5 5 /* hash algorithm - MD5 */ 180 181 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */ 182 #define CISCO_UNICAST 0x0f /* Cisco unicast address */ 183 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ 184 #define CISCO_ADDR_REQ 0 /* Cisco address request */ 185 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */ 186 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ 187 188 /* states are named and numbered according to RFC 1661 */ 189 #define STATE_INITIAL 0 190 #define STATE_STARTING 1 191 #define STATE_CLOSED 2 192 #define STATE_STOPPED 3 193 #define STATE_CLOSING 4 194 #define STATE_STOPPING 5 195 #define STATE_REQ_SENT 6 196 #define STATE_ACK_RCVD 7 197 #define STATE_ACK_SENT 8 198 #define STATE_OPENED 9 199 200 struct ppp_header { 201 uint8_t address; 202 uint8_t control; 203 uint16_t protocol; 204 } __packed; 205 #define PPP_HEADER_LEN sizeof (struct ppp_header) 206 207 struct lcp_header { 208 uint8_t type; 209 uint8_t ident; 210 uint16_t len; 211 } __packed; 212 #define LCP_HEADER_LEN sizeof (struct lcp_header) 213 214 struct cisco_packet { 215 uint32_t type; 216 uint32_t par1; 217 uint32_t par2; 218 uint16_t rel; 219 uint16_t time0; 220 uint16_t time1; 221 } __packed; 222 #define CISCO_PACKET_LEN 18 223 224 /* 225 * We follow the spelling and capitalization of RFC 1661 here, to make 226 * it easier comparing with the standard. Please refer to this RFC in 227 * case you can't make sense out of these abbreviation; it will also 228 * explain the semantics related to the various events and actions. 229 */ 230 struct cp { 231 u_short proto; /* PPP control protocol number */ 232 u_char protoidx; /* index into state table in struct sppp */ 233 u_char flags; 234 #define CP_LCP 0x01 /* this is the LCP */ 235 #define CP_AUTH 0x02 /* this is an authentication protocol */ 236 #define CP_NCP 0x04 /* this is a NCP */ 237 #define CP_QUAL 0x08 /* this is a quality reporting protocol */ 238 const char *name; /* name of this control protocol */ 239 /* event handlers */ 240 void (*Up)(struct sppp *sp); 241 void (*Down)(struct sppp *sp); 242 void (*Open)(struct sppp *sp); 243 void (*Close)(struct sppp *sp); 244 void (*TO)(void *sp); 245 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len); 246 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len); 247 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len); 248 /* actions */ 249 void (*tlu)(struct sppp *sp); 250 void (*tld)(struct sppp *sp); 251 void (*tls)(struct sppp *sp); 252 void (*tlf)(struct sppp *sp); 253 void (*scr)(struct sppp *sp); 254 }; 255 256 static struct sppp *spppq; 257 static kmutex_t *spppq_lock = NULL; 258 static callout_t keepalive_ch; 259 260 #define SPPPQ_LOCK() if (spppq_lock) \ 261 mutex_enter(spppq_lock); 262 #define SPPPQ_UNLOCK() if (spppq_lock) \ 263 mutex_exit(spppq_lock); 264 265 #define SPPP_LOCK(_sp, _op) rw_enter(&(_sp)->pp_lock, (_op)) 266 #define SPPP_UNLOCK(_sp) rw_exit(&(_sp)->pp_lock) 267 #define SPPP_WLOCKED(_sp) rw_write_held(&(_sp)->pp_lock) 268 #define SPPP_UPGRADE(_sp) do{ \ 269 SPPP_UNLOCK(_sp); \ 270 SPPP_LOCK(_sp, RW_WRITER); \ 271 }while (0) 272 #define SPPP_DOWNGRADE(_sp) rw_downgrade(&(_sp)->pp_lock) 273 274 #ifdef INET 275 #ifndef SPPPSUBR_MPSAFE 276 /* 277 * The following disgusting hack gets around the problem that IP TOS 278 * can't be set yet. We want to put "interactive" traffic on a high 279 * priority queue. To decide if traffic is interactive, we check that 280 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 281 * 282 * XXX is this really still necessary? - joerg - 283 */ 284 static u_short interactive_ports[8] = { 285 0, 513, 0, 0, 286 0, 21, 0, 23, 287 }; 288 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 289 #endif /* SPPPSUBR_MPSAFE */ 290 #endif 291 292 /* almost every function needs these */ 293 #define STDDCL \ 294 struct ifnet *ifp = &sp->pp_if; \ 295 int debug = ifp->if_flags & IFF_DEBUG 296 297 static int sppp_output(struct ifnet *ifp, struct mbuf *m, 298 const struct sockaddr *dst, const struct rtentry *rt); 299 300 static void sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2); 301 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m); 302 303 static void sppp_cp_input(const struct cp *cp, struct sppp *sp, 304 struct mbuf *m); 305 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 306 u_char ident, u_short len, void *data); 307 /* static void sppp_cp_timeout(void *arg); */ 308 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp, 309 int newstate); 310 static void sppp_auth_send(const struct cp *cp, 311 struct sppp *sp, unsigned int type, unsigned int id, 312 ...); 313 314 static void sppp_up_event(const struct cp *cp, struct sppp *sp); 315 static void sppp_down_event(const struct cp *cp, struct sppp *sp); 316 static void sppp_open_event(const struct cp *cp, struct sppp *sp); 317 static void sppp_close_event(const struct cp *cp, struct sppp *sp); 318 static void sppp_to_event(const struct cp *cp, struct sppp *sp); 319 320 static void sppp_null(struct sppp *sp); 321 322 static void sppp_lcp_init(struct sppp *sp); 323 static void sppp_lcp_up(struct sppp *sp); 324 static void sppp_lcp_down(struct sppp *sp); 325 static void sppp_lcp_open(struct sppp *sp); 326 static void sppp_lcp_close(struct sppp *sp); 327 static void sppp_lcp_TO(void *sp); 328 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 329 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 330 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 331 static void sppp_lcp_tlu(struct sppp *sp); 332 static void sppp_lcp_tld(struct sppp *sp); 333 static void sppp_lcp_tls(struct sppp *sp); 334 static void sppp_lcp_tlf(struct sppp *sp); 335 static void sppp_lcp_scr(struct sppp *sp); 336 static void sppp_lcp_check_and_close(struct sppp *sp); 337 static int sppp_ncp_check(struct sppp *sp); 338 339 static void sppp_ipcp_init(struct sppp *sp); 340 static void sppp_ipcp_up(struct sppp *sp); 341 static void sppp_ipcp_down(struct sppp *sp); 342 static void sppp_ipcp_open(struct sppp *sp); 343 static void sppp_ipcp_close(struct sppp *sp); 344 static void sppp_ipcp_TO(void *sp); 345 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 346 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 347 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 348 static void sppp_ipcp_tlu(struct sppp *sp); 349 static void sppp_ipcp_tld(struct sppp *sp); 350 static void sppp_ipcp_tls(struct sppp *sp); 351 static void sppp_ipcp_tlf(struct sppp *sp); 352 static void sppp_ipcp_scr(struct sppp *sp); 353 354 static void sppp_ipv6cp_init(struct sppp *sp); 355 static void sppp_ipv6cp_up(struct sppp *sp); 356 static void sppp_ipv6cp_down(struct sppp *sp); 357 static void sppp_ipv6cp_open(struct sppp *sp); 358 static void sppp_ipv6cp_close(struct sppp *sp); 359 static void sppp_ipv6cp_TO(void *sp); 360 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len); 361 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 362 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 363 static void sppp_ipv6cp_tlu(struct sppp *sp); 364 static void sppp_ipv6cp_tld(struct sppp *sp); 365 static void sppp_ipv6cp_tls(struct sppp *sp); 366 static void sppp_ipv6cp_tlf(struct sppp *sp); 367 static void sppp_ipv6cp_scr(struct sppp *sp); 368 369 static void sppp_pap_input(struct sppp *sp, struct mbuf *m); 370 static void sppp_pap_init(struct sppp *sp); 371 static void sppp_pap_open(struct sppp *sp); 372 static void sppp_pap_close(struct sppp *sp); 373 static void sppp_pap_TO(void *sp); 374 static void sppp_pap_my_TO(void *sp); 375 static void sppp_pap_tlu(struct sppp *sp); 376 static void sppp_pap_tld(struct sppp *sp); 377 static void sppp_pap_scr(struct sppp *sp); 378 379 static void sppp_chap_input(struct sppp *sp, struct mbuf *m); 380 static void sppp_chap_init(struct sppp *sp); 381 static void sppp_chap_open(struct sppp *sp); 382 static void sppp_chap_close(struct sppp *sp); 383 static void sppp_chap_TO(void *sp); 384 static void sppp_chap_tlu(struct sppp *sp); 385 static void sppp_chap_tld(struct sppp *sp); 386 static void sppp_chap_scr(struct sppp *sp); 387 388 static const char *sppp_auth_type_name(u_short proto, u_char type); 389 static const char *sppp_cp_type_name(u_char type); 390 static const char *sppp_dotted_quad(uint32_t addr); 391 static const char *sppp_ipcp_opt_name(u_char opt); 392 #ifdef INET6 393 static const char *sppp_ipv6cp_opt_name(u_char opt); 394 #endif 395 static const char *sppp_lcp_opt_name(u_char opt); 396 static const char *sppp_phase_name(int phase); 397 static const char *sppp_proto_name(u_short proto); 398 static const char *sppp_state_name(int state); 399 static int sppp_params(struct sppp *sp, u_long cmd, void *data); 400 #ifdef INET 401 static void sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, 402 uint32_t *srcmask); 403 static void sppp_set_ip_addrs_work(struct work *wk, struct sppp *sp); 404 static void sppp_set_ip_addrs(struct sppp *sp); 405 static void sppp_clear_ip_addrs_work(struct work *wk, struct sppp *sp); 406 static void sppp_clear_ip_addrs(struct sppp *sp); 407 static void sppp_update_ip_addrs_work(struct work *wk, void *arg); 408 #endif 409 static void sppp_keepalive(void *dummy); 410 static void sppp_phase_network(struct sppp *sp); 411 static void sppp_print_bytes(const u_char *p, u_short len); 412 static void sppp_print_string(const char *p, u_short len); 413 #ifdef INET6 414 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, 415 struct in6_addr *dst, struct in6_addr *srcmask); 416 #ifdef IPV6CP_MYIFID_DYN 417 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src); 418 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src); 419 #endif 420 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src); 421 #endif 422 423 static void sppp_notify_up(struct sppp *); 424 static void sppp_notify_down(struct sppp *); 425 static void sppp_notify_tls_wlocked(struct sppp *); 426 static void sppp_notify_tlf_wlocked(struct sppp *); 427 #ifdef INET6 428 static void sppp_notify_con_wlocked(struct sppp *); 429 #endif 430 static void sppp_notify_con(struct sppp *); 431 432 static void sppp_notify_chg_wlocked(struct sppp *); 433 434 435 /* our control protocol descriptors */ 436 static const struct cp lcp = { 437 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 438 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close, 439 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak, 440 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf, 441 sppp_lcp_scr 442 }; 443 444 static const struct cp ipcp = { 445 PPP_IPCP, IDX_IPCP, 446 #ifdef INET 447 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 448 #else 449 0, 450 #endif 451 "ipcp", 452 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close, 453 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak, 454 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf, 455 sppp_ipcp_scr 456 }; 457 458 static const struct cp ipv6cp = { 459 PPP_IPV6CP, IDX_IPV6CP, 460 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 461 CP_NCP, 462 #else 463 0, 464 #endif 465 "ipv6cp", 466 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close, 467 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak, 468 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf, 469 sppp_ipv6cp_scr 470 }; 471 472 static const struct cp pap = { 473 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 474 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close, 475 sppp_pap_TO, 0, 0, 0, 476 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null, 477 sppp_pap_scr 478 }; 479 480 static const struct cp chap = { 481 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 482 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close, 483 sppp_chap_TO, 0, 0, 0, 484 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null, 485 sppp_chap_scr 486 }; 487 488 static const struct cp *cps[IDX_COUNT] = { 489 &lcp, /* IDX_LCP */ 490 &ipcp, /* IDX_IPCP */ 491 &ipv6cp, /* IDX_IPV6CP */ 492 &pap, /* IDX_PAP */ 493 &chap, /* IDX_CHAP */ 494 }; 495 496 static void 497 sppp_change_phase(struct sppp *sp, int phase) 498 { 499 STDDCL; 500 501 KASSERT(SPPP_WLOCKED(sp)); 502 503 if (sp->pp_phase == phase) 504 return; 505 506 sp->pp_phase = phase; 507 508 if (phase == SPPP_PHASE_NETWORK) 509 if_link_state_change(ifp, LINK_STATE_UP); 510 else 511 if_link_state_change(ifp, LINK_STATE_DOWN); 512 513 if (debug) 514 { 515 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 516 sppp_phase_name(sp->pp_phase)); 517 } 518 } 519 520 /* 521 * Exported functions, comprising our interface to the lower layer. 522 */ 523 524 /* 525 * Process the received packet. 526 */ 527 void 528 sppp_input(struct ifnet *ifp, struct mbuf *m) 529 { 530 struct ppp_header *h = NULL; 531 pktqueue_t *pktq = NULL; 532 struct ifqueue *inq = NULL; 533 uint16_t protocol; 534 struct sppp *sp = (struct sppp *)ifp; 535 int debug = ifp->if_flags & IFF_DEBUG; 536 int isr = 0; 537 538 SPPP_LOCK(sp, RW_READER); 539 540 if (ifp->if_flags & IFF_UP) { 541 /* Count received bytes, add hardware framing */ 542 if_statadd(ifp, if_ibytes, m->m_pkthdr.len + sp->pp_framebytes); 543 /* Note time of last receive */ 544 sp->pp_last_receive = time_uptime; 545 } 546 547 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 548 /* Too small packet, drop it. */ 549 if (debug) 550 log(LOG_DEBUG, 551 "%s: input packet is too small, %d bytes\n", 552 ifp->if_xname, m->m_pkthdr.len); 553 drop: 554 if_statadd2(ifp, if_ierrors, 1, if_iqdrops, 1); 555 m_freem(m); 556 SPPP_UNLOCK(sp); 557 return; 558 } 559 560 if (sp->pp_flags & PP_NOFRAMING) { 561 memcpy(&protocol, mtod(m, void *), 2); 562 protocol = ntohs(protocol); 563 m_adj(m, 2); 564 } else { 565 566 /* Get PPP header. */ 567 h = mtod(m, struct ppp_header *); 568 m_adj(m, PPP_HEADER_LEN); 569 570 switch (h->address) { 571 case PPP_ALLSTATIONS: 572 if (h->control != PPP_UI) 573 goto invalid; 574 if (sp->pp_flags & PP_CISCO) { 575 if (debug) 576 log(LOG_DEBUG, 577 "%s: PPP packet in Cisco mode " 578 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 579 ifp->if_xname, 580 h->address, h->control, ntohs(h->protocol)); 581 goto drop; 582 } 583 break; 584 case CISCO_MULTICAST: 585 case CISCO_UNICAST: 586 /* Don't check the control field here (RFC 1547). */ 587 if (! (sp->pp_flags & PP_CISCO)) { 588 if (debug) 589 log(LOG_DEBUG, 590 "%s: Cisco packet in PPP mode " 591 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 592 ifp->if_xname, 593 h->address, h->control, ntohs(h->protocol)); 594 goto drop; 595 } 596 switch (ntohs(h->protocol)) { 597 default: 598 if_statinc(ifp, if_noproto); 599 goto invalid; 600 case CISCO_KEEPALIVE: 601 SPPP_UNLOCK(sp); 602 sppp_cisco_input((struct sppp *) ifp, m); 603 m_freem(m); 604 return; 605 #ifdef INET 606 case ETHERTYPE_IP: 607 pktq = ip_pktq; 608 break; 609 #endif 610 #ifdef INET6 611 case ETHERTYPE_IPV6: 612 pktq = ip6_pktq; 613 break; 614 #endif 615 } 616 goto queue_pkt; 617 default: /* Invalid PPP packet. */ 618 invalid: 619 if (debug) 620 log(LOG_DEBUG, 621 "%s: invalid input packet " 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 protocol = ntohs(h->protocol); 628 } 629 630 switch (protocol) { 631 default: 632 if (sp->state[IDX_LCP] == STATE_OPENED) { 633 uint16_t prot = htons(protocol); 634 635 SPPP_UPGRADE(sp); 636 sppp_cp_send(sp, PPP_LCP, PROTO_REJ, 637 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2, 638 &prot); 639 SPPP_DOWNGRADE(sp); 640 } 641 if (debug) 642 log(LOG_DEBUG, 643 "%s: invalid input protocol " 644 "<proto=0x%x>\n", ifp->if_xname, ntohs(protocol)); 645 if_statinc(ifp, if_noproto); 646 goto drop; 647 case PPP_LCP: 648 SPPP_UNLOCK(sp); 649 sppp_cp_input(&lcp, sp, m); 650 m_freem(m); 651 return; 652 case PPP_PAP: 653 SPPP_UNLOCK(sp); 654 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 655 sppp_pap_input(sp, m); 656 } 657 m_freem(m); 658 return; 659 case PPP_CHAP: 660 SPPP_UNLOCK(sp); 661 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 662 sppp_chap_input(sp, m); 663 } 664 m_freem(m); 665 return; 666 #ifdef INET 667 case PPP_IPCP: 668 SPPP_UNLOCK(sp); 669 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 670 sppp_cp_input(&ipcp, sp, m); 671 } 672 m_freem(m); 673 return; 674 case PPP_IP: 675 if (sp->state[IDX_IPCP] == STATE_OPENED) { 676 sp->pp_last_activity = time_uptime; 677 pktq = ip_pktq; 678 } 679 break; 680 #endif 681 #ifdef INET6 682 case PPP_IPV6CP: 683 SPPP_UNLOCK(sp); 684 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 685 sppp_cp_input(&ipv6cp, sp, m); 686 } 687 m_freem(m); 688 return; 689 690 case PPP_IPV6: 691 if (sp->state[IDX_IPV6CP] == STATE_OPENED) { 692 sp->pp_last_activity = time_uptime; 693 pktq = ip6_pktq; 694 } 695 break; 696 #endif 697 } 698 699 queue_pkt: 700 if ((ifp->if_flags & IFF_UP) == 0 || (!inq && !pktq)) { 701 goto drop; 702 } 703 704 /* Check queue. */ 705 if (__predict_true(pktq)) { 706 if (__predict_false(!pktq_enqueue(pktq, m, 0))) { 707 goto drop; 708 } 709 SPPP_UNLOCK(sp); 710 return; 711 } 712 713 SPPP_UNLOCK(sp); 714 715 IFQ_LOCK(inq); 716 if (IF_QFULL(inq)) { 717 /* Queue overflow. */ 718 IF_DROP(inq); 719 IFQ_UNLOCK(inq); 720 if (debug) 721 log(LOG_DEBUG, "%s: protocol queue overflow\n", 722 ifp->if_xname); 723 724 SPPP_LOCK(sp, RW_READER); 725 goto drop; 726 } 727 IF_ENQUEUE(inq, m); 728 IFQ_UNLOCK(inq); 729 schednetisr(isr); 730 } 731 732 /* 733 * Enqueue transmit packet. 734 */ 735 static int 736 sppp_output(struct ifnet *ifp, struct mbuf *m, 737 const struct sockaddr *dst, const struct rtentry *rt) 738 { 739 struct sppp *sp = (struct sppp *) ifp; 740 struct ppp_header *h = NULL; 741 #ifndef SPPPSUBR_MPSAFE 742 struct ifqueue *ifq = NULL; /* XXX */ 743 #endif 744 int s, error = 0; 745 uint16_t protocol; 746 size_t pktlen; 747 748 s = splnet(); 749 SPPP_LOCK(sp, RW_READER); 750 751 sp->pp_last_activity = time_uptime; 752 753 if ((ifp->if_flags & IFF_UP) == 0 || 754 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 755 SPPP_UNLOCK(sp); 756 splx(s); 757 758 m_freem(m); 759 760 return (ENETDOWN); 761 } 762 763 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 764 /* 765 * Interface is not yet running, but auto-dial. Need 766 * to start LCP for it. 767 */ 768 ifp->if_flags |= IFF_RUNNING; 769 770 SPPP_UNLOCK(sp); 771 splx(s); 772 773 SPPP_LOCK(sp, RW_WRITER); 774 lcp.Open(sp); 775 SPPP_UNLOCK(sp); 776 777 s = splnet(); 778 SPPP_LOCK(sp, RW_READER); 779 } 780 781 /* 782 * If the queueing discipline needs packet classification, 783 * do it before prepending link headers. 784 */ 785 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family); 786 787 #ifdef INET 788 if (dst->sa_family == AF_INET) { 789 struct ip *ip = NULL; 790 #ifndef SPPPSUBR_MPSAFE 791 struct tcphdr *th = NULL; 792 #endif 793 794 if (m->m_len >= sizeof(struct ip)) { 795 ip = mtod(m, struct ip *); 796 #ifndef SPPPSUBR_MPSAFE 797 if (ip->ip_p == IPPROTO_TCP && 798 m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) + 799 sizeof(struct tcphdr)) { 800 th = (struct tcphdr *) 801 ((char *)ip + (ip->ip_hl << 2)); 802 } 803 #endif 804 } else 805 ip = NULL; 806 807 /* 808 * When using dynamic local IP address assignment by using 809 * 0.0.0.0 as a local address, the first TCP session will 810 * not connect because the local TCP checksum is computed 811 * using 0.0.0.0 which will later become our real IP address 812 * so the TCP checksum computed at the remote end will 813 * become invalid. So we 814 * - don't let packets with src ip addr 0 thru 815 * - we flag TCP packets with src ip 0 as an error 816 */ 817 if (ip && ip->ip_src.s_addr == INADDR_ANY) { 818 uint8_t proto = ip->ip_p; 819 820 SPPP_UNLOCK(sp); 821 splx(s); 822 823 m_freem(m); 824 if (proto == IPPROTO_TCP) 825 return (EADDRNOTAVAIL); 826 else 827 return (0); 828 } 829 830 #ifndef SPPPSUBR_MPSAFE 831 /* 832 * Put low delay, telnet, rlogin and ftp control packets 833 * in front of the queue. 834 */ 835 if (!IF_QFULL(&sp->pp_fastq) && 836 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || 837 (th && (INTERACTIVE(ntohs(th->th_sport)) || 838 INTERACTIVE(ntohs(th->th_dport)))))) 839 ifq = &sp->pp_fastq; 840 #endif /* !SPPPSUBR_MPSAFE */ 841 } 842 #endif 843 844 #ifdef INET6 845 if (dst->sa_family == AF_INET6) { 846 /* XXX do something tricky here? */ 847 } 848 #endif 849 850 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 851 /* 852 * Prepend general data packet PPP header. For now, IP only. 853 */ 854 M_PREPEND(m, PPP_HEADER_LEN, M_DONTWAIT); 855 if (! m) { 856 if (ifp->if_flags & IFF_DEBUG) 857 log(LOG_DEBUG, "%s: no memory for transmit header\n", 858 ifp->if_xname); 859 if_statinc(ifp, if_oerrors); 860 SPPP_UNLOCK(sp); 861 splx(s); 862 return (ENOBUFS); 863 } 864 /* 865 * May want to check size of packet 866 * (albeit due to the implementation it's always enough) 867 */ 868 h = mtod(m, struct ppp_header *); 869 if (sp->pp_flags & PP_CISCO) { 870 h->address = CISCO_UNICAST; /* unicast address */ 871 h->control = 0; 872 } else { 873 h->address = PPP_ALLSTATIONS; /* broadcast address */ 874 h->control = PPP_UI; /* Unnumbered Info */ 875 } 876 } 877 878 switch (dst->sa_family) { 879 #ifdef INET 880 case AF_INET: /* Internet Protocol */ 881 if (sp->pp_flags & PP_CISCO) 882 protocol = htons(ETHERTYPE_IP); 883 else { 884 /* 885 * Don't choke with an ENETDOWN early. It's 886 * possible that we just started dialing out, 887 * so don't drop the packet immediately. If 888 * we notice that we run out of buffer space 889 * below, we will however remember that we are 890 * not ready to carry IP packets, and return 891 * ENETDOWN, as opposed to ENOBUFS. 892 */ 893 protocol = htons(PPP_IP); 894 if (sp->state[IDX_IPCP] != STATE_OPENED) 895 error = ENETDOWN; 896 } 897 break; 898 #endif 899 #ifdef INET6 900 case AF_INET6: /* Internet Protocol version 6 */ 901 if (sp->pp_flags & PP_CISCO) 902 protocol = htons(ETHERTYPE_IPV6); 903 else { 904 /* 905 * Don't choke with an ENETDOWN early. It's 906 * possible that we just started dialing out, 907 * so don't drop the packet immediately. If 908 * we notice that we run out of buffer space 909 * below, we will however remember that we are 910 * not ready to carry IP packets, and return 911 * ENETDOWN, as opposed to ENOBUFS. 912 */ 913 protocol = htons(PPP_IPV6); 914 if (sp->state[IDX_IPV6CP] != STATE_OPENED) 915 error = ENETDOWN; 916 } 917 break; 918 #endif 919 default: 920 m_freem(m); 921 if_statinc(ifp, if_oerrors); 922 SPPP_UNLOCK(sp); 923 splx(s); 924 return (EAFNOSUPPORT); 925 } 926 927 if (sp->pp_flags & PP_NOFRAMING) { 928 M_PREPEND(m, 2, M_DONTWAIT); 929 if (m == NULL) { 930 if (ifp->if_flags & IFF_DEBUG) 931 log(LOG_DEBUG, "%s: no memory for transmit header\n", 932 ifp->if_xname); 933 if_statinc(ifp, if_oerrors); 934 SPPP_UNLOCK(sp); 935 splx(s); 936 return (ENOBUFS); 937 } 938 *mtod(m, uint16_t *) = protocol; 939 } else { 940 h->protocol = protocol; 941 } 942 943 pktlen = m->m_pkthdr.len; 944 #ifdef SPPPSUBR_MPSAFE 945 SPPP_UNLOCK(sp); 946 error = if_transmit_lock(ifp, m); 947 SPPP_LOCK(sp, RW_READER); 948 if (error == 0) 949 if_statadd(ifp, if_obytes, pktlen + sp->pp_framebytes); 950 #else /* !SPPPSUBR_MPSAFE */ 951 error = ifq_enqueue2(ifp, ifq, m); 952 953 if (error == 0) { 954 /* 955 * Count output packets and bytes. 956 * The packet length includes header + additional hardware 957 * framing according to RFC 1333. 958 */ 959 if (!(ifp->if_flags & IFF_OACTIVE)) { 960 SPPP_UNLOCK(sp); 961 if_start_lock(ifp); 962 SPPP_LOCK(sp, RW_READER); 963 } 964 if_statadd(ifp, if_obytes, pktlen + sp->pp_framebytes); 965 } 966 #endif /* !SPPPSUBR_MPSAFE */ 967 SPPP_UNLOCK(sp); 968 splx(s); 969 return error; 970 } 971 972 static int 973 sppp_mediachange(struct ifnet *ifp) 974 { 975 976 return (0); 977 } 978 979 static void 980 sppp_mediastatus(struct ifnet *ifp, struct ifmediareq *imr) 981 { 982 int link_state; 983 984 link_state = atomic_load_relaxed(&ifp->if_link_state); 985 switch (link_state) { 986 case LINK_STATE_UP: 987 imr->ifm_status = IFM_AVALID | IFM_ACTIVE; 988 break; 989 case LINK_STATE_DOWN: 990 imr->ifm_status = IFM_AVALID; 991 break; 992 default: 993 /* Should be impossible as we set link state down in attach. */ 994 imr->ifm_status = 0; 995 break; 996 } 997 } 998 999 void 1000 sppp_attach(struct ifnet *ifp) 1001 { 1002 struct sppp *sp = (struct sppp *) ifp; 1003 1004 /* Initialize keepalive handler. */ 1005 if (! spppq) { 1006 callout_init(&keepalive_ch, CALLOUT_MPSAFE); 1007 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 1008 } 1009 1010 if (! spppq_lock) 1011 spppq_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_SOFTNET); 1012 1013 /* Insert new entry into the keepalive list. */ 1014 sp->pp_next = spppq; 1015 spppq = sp; 1016 1017 sp->pp_if.if_type = IFT_PPP; 1018 sp->pp_if.if_output = sppp_output; 1019 sp->pp_fastq.ifq_maxlen = 32; 1020 sp->pp_cpq.ifq_maxlen = 20; 1021 sp->pp_loopcnt = 0; 1022 sp->pp_alivecnt = 0; 1023 sp->pp_last_activity = 0; 1024 sp->pp_last_receive = 0; 1025 sp->pp_maxalive = DEFAULT_MAXALIVECNT; 1026 sp->pp_max_noreceive = DEFAULT_NORECV_TIME; 1027 sp->pp_idle_timeout = 0; 1028 memset(&sp->pp_seq[0], 0, sizeof(sp->pp_seq)); 1029 memset(&sp->pp_rseq[0], 0, sizeof(sp->pp_rseq)); 1030 sp->pp_auth_failures = 0; 1031 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 1032 sp->pp_phase = SPPP_PHASE_DEAD; 1033 sp->pp_up = sppp_notify_up; 1034 sp->pp_down = sppp_notify_down; 1035 rw_init(&sp->pp_lock); 1036 1037 if_alloc_sadl(ifp); 1038 1039 /* Lets not beat about the bush, we know we're down. */ 1040 ifp->if_link_state = LINK_STATE_DOWN; 1041 /* There is no media for PPP, but it's needed to report link status. */ 1042 ifmedia_init(&sp->pp_im, 0, sppp_mediachange, sppp_mediastatus); 1043 1044 memset(&sp->myauth, 0, sizeof sp->myauth); 1045 memset(&sp->hisauth, 0, sizeof sp->hisauth); 1046 SPPP_LOCK(sp, RW_WRITER); 1047 sppp_lcp_init(sp); 1048 sppp_ipcp_init(sp); 1049 sppp_ipv6cp_init(sp); 1050 sppp_pap_init(sp); 1051 sppp_chap_init(sp); 1052 SPPP_UNLOCK(sp); 1053 } 1054 1055 void 1056 sppp_detach(struct ifnet *ifp) 1057 { 1058 struct sppp **q, *p, *sp = (struct sppp *) ifp; 1059 1060 /* Remove the entry from the keepalive list. */ 1061 SPPPQ_LOCK(); 1062 for (q = &spppq; (p = *q); q = &p->pp_next) 1063 if (p == sp) { 1064 *q = p->pp_next; 1065 break; 1066 } 1067 SPPPQ_UNLOCK(); 1068 1069 if (! spppq) { 1070 /* Stop keepalive handler. */ 1071 callout_stop(&keepalive_ch); 1072 mutex_obj_free(spppq_lock); 1073 spppq_lock = NULL; 1074 } 1075 1076 SPPP_LOCK(sp, RW_WRITER); 1077 1078 /* to avoid workqueue enqueued */ 1079 atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1); 1080 workqueue_wait(sp->ipcp.update_addrs_wq, &sp->ipcp.update_addrs_wk); 1081 workqueue_destroy(sp->ipcp.update_addrs_wq); 1082 pcq_destroy(sp->ipcp.update_addrs_q); 1083 1084 callout_stop(&sp->ch[IDX_LCP]); 1085 callout_stop(&sp->ch[IDX_IPCP]); 1086 callout_stop(&sp->ch[IDX_PAP]); 1087 callout_stop(&sp->ch[IDX_CHAP]); 1088 #ifdef INET6 1089 callout_stop(&sp->ch[IDX_IPV6CP]); 1090 #endif 1091 callout_stop(&sp->pap_my_to_ch); 1092 1093 /* free authentication info */ 1094 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 1095 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 1096 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 1097 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 1098 SPPP_UNLOCK(sp); 1099 rw_destroy(&sp->pp_lock); 1100 1101 ifmedia_fini(&sp->pp_im); 1102 } 1103 1104 /* 1105 * Flush the interface output queue. 1106 */ 1107 void 1108 sppp_flush(struct ifnet *ifp) 1109 { 1110 struct sppp *sp = (struct sppp *) ifp; 1111 1112 SPPP_LOCK(sp, RW_WRITER); 1113 IFQ_PURGE(&sp->pp_if.if_snd); 1114 IF_PURGE(&sp->pp_fastq); 1115 IF_PURGE(&sp->pp_cpq); 1116 SPPP_UNLOCK(sp); 1117 } 1118 1119 /* 1120 * Check if the output queue is empty. 1121 */ 1122 int 1123 sppp_isempty(struct ifnet *ifp) 1124 { 1125 struct sppp *sp = (struct sppp *) ifp; 1126 int empty, s; 1127 1128 s = splnet(); 1129 SPPP_LOCK(sp, RW_READER); 1130 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1131 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1132 SPPP_UNLOCK(sp); 1133 splx(s); 1134 return (empty); 1135 } 1136 1137 /* 1138 * Get next packet to send. 1139 */ 1140 struct mbuf * 1141 sppp_dequeue(struct ifnet *ifp) 1142 { 1143 struct sppp *sp = (struct sppp *) ifp; 1144 struct mbuf *m; 1145 int s; 1146 1147 s = splnet(); 1148 SPPP_LOCK(sp, RW_WRITER); 1149 /* 1150 * Process only the control protocol queue until we have at 1151 * least one NCP open. 1152 * 1153 * Do always serve all three queues in Cisco mode. 1154 */ 1155 IF_DEQUEUE(&sp->pp_cpq, m); 1156 if (m == NULL && 1157 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { 1158 IF_DEQUEUE(&sp->pp_fastq, m); 1159 if (m == NULL) 1160 IFQ_DEQUEUE(&sp->pp_if.if_snd, m); 1161 } 1162 SPPP_UNLOCK(sp); 1163 splx(s); 1164 return m; 1165 } 1166 1167 /* 1168 * Process an ioctl request. Called on low priority level. 1169 */ 1170 int 1171 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1172 { 1173 struct lwp *l = curlwp; /* XXX */ 1174 struct ifreq *ifr = (struct ifreq *) data; 1175 struct ifaddr *ifa = (struct ifaddr *) data; 1176 struct sppp *sp = (struct sppp *) ifp; 1177 int s, error=0, going_up, going_down; 1178 u_short newmode; 1179 1180 s = splnet(); 1181 switch (cmd) { 1182 case SIOCINITIFADDR: 1183 ifa->ifa_rtrequest = p2p_rtrequest; 1184 break; 1185 1186 case SIOCSIFFLAGS: 1187 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1188 break; 1189 1190 SPPP_LOCK(sp, RW_WRITER); 1191 going_up = ifp->if_flags & IFF_UP && 1192 (ifp->if_flags & IFF_RUNNING) == 0; 1193 going_down = (ifp->if_flags & IFF_UP) == 0 && 1194 ifp->if_flags & IFF_RUNNING; 1195 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1196 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1197 /* sanity */ 1198 newmode = IFF_PASSIVE; 1199 ifp->if_flags &= ~IFF_AUTO; 1200 } 1201 1202 if (going_up || going_down) { 1203 lcp.Close(sp); 1204 } 1205 if (going_up && newmode == 0) { 1206 /* neither auto-dial nor passive */ 1207 ifp->if_flags |= IFF_RUNNING; 1208 if (!(sp->pp_flags & PP_CISCO)) 1209 lcp.Open(sp); 1210 } else if (going_down) { 1211 SPPP_UNLOCK(sp); 1212 sppp_flush(ifp); 1213 SPPP_LOCK(sp, RW_WRITER); 1214 1215 ifp->if_flags &= ~IFF_RUNNING; 1216 } 1217 SPPP_UNLOCK(sp); 1218 break; 1219 1220 case SIOCSIFMTU: 1221 if (ifr->ifr_mtu < PPP_MINMRU || 1222 ifr->ifr_mtu > sp->lcp.their_mru) { 1223 error = EINVAL; 1224 break; 1225 } 1226 /*FALLTHROUGH*/ 1227 case SIOCGIFMTU: 1228 if ((error = ifioctl_common(ifp, cmd, data)) == ENETRESET) 1229 error = 0; 1230 break; 1231 case SIOCADDMULTI: 1232 case SIOCDELMULTI: 1233 break; 1234 1235 case SPPPSETAUTHCFG: 1236 case SPPPSETLCPCFG: 1237 case SPPPSETIDLETO: 1238 case SPPPSETAUTHFAILURE: 1239 case SPPPSETDNSOPTS: 1240 case SPPPSETKEEPALIVE: 1241 #if defined(COMPAT_50) || defined(MODULAR) 1242 case __SPPPSETIDLETO50: 1243 case __SPPPSETKEEPALIVE50: 1244 #endif /* COMPAT_50 || MODULAR */ 1245 error = kauth_authorize_network(l->l_cred, 1246 KAUTH_NETWORK_INTERFACE, 1247 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd, 1248 NULL); 1249 if (error) 1250 break; 1251 error = sppp_params(sp, cmd, data); 1252 break; 1253 1254 case SPPPGETAUTHCFG: 1255 case SPPPGETLCPCFG: 1256 case SPPPGETAUTHFAILURES: 1257 error = kauth_authorize_network(l->l_cred, 1258 KAUTH_NETWORK_INTERFACE, 1259 KAUTH_REQ_NETWORK_INTERFACE_GETPRIV, ifp, (void *)cmd, 1260 NULL); 1261 if (error) 1262 break; 1263 error = sppp_params(sp, cmd, data); 1264 break; 1265 1266 case SPPPGETSTATUS: 1267 case SPPPGETSTATUSNCP: 1268 case SPPPGETIDLETO: 1269 case SPPPGETDNSOPTS: 1270 case SPPPGETDNSADDRS: 1271 case SPPPGETKEEPALIVE: 1272 #if defined(COMPAT_50) || defined(MODULAR) 1273 case __SPPPGETIDLETO50: 1274 case __SPPPGETKEEPALIVE50: 1275 #endif /* COMPAT_50 || MODULAR */ 1276 error = sppp_params(sp, cmd, data); 1277 break; 1278 1279 case SIOCGIFMEDIA: 1280 error = ifmedia_ioctl(ifp, ifr, &sp->pp_im, cmd); 1281 break; 1282 1283 default: 1284 error = ifioctl_common(ifp, cmd, data); 1285 break; 1286 } 1287 splx(s); 1288 return (error); 1289 } 1290 1291 1292 /* 1293 * Cisco framing implementation. 1294 */ 1295 1296 /* 1297 * Handle incoming Cisco keepalive protocol packets. 1298 */ 1299 static void 1300 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1301 { 1302 STDDCL; 1303 struct cisco_packet *h; 1304 #ifdef INET 1305 uint32_t me, mymask = 0; /* XXX: GCC */ 1306 #endif 1307 1308 SPPP_LOCK(sp, RW_WRITER); 1309 1310 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1311 if (debug) 1312 log(LOG_DEBUG, 1313 "%s: cisco invalid packet length: %d bytes\n", 1314 ifp->if_xname, m->m_pkthdr.len); 1315 SPPP_UNLOCK(sp); 1316 return; 1317 } 1318 h = mtod(m, struct cisco_packet *); 1319 if (debug) 1320 log(LOG_DEBUG, 1321 "%s: cisco input: %d bytes " 1322 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1323 ifp->if_xname, m->m_pkthdr.len, 1324 ntohl(h->type), h->par1, h->par2, (u_int)h->rel, 1325 (u_int)h->time0, (u_int)h->time1); 1326 switch (ntohl(h->type)) { 1327 default: 1328 if (debug) 1329 addlog("%s: cisco unknown packet type: 0x%x\n", 1330 ifp->if_xname, ntohl(h->type)); 1331 break; 1332 case CISCO_ADDR_REPLY: 1333 /* Reply on address request, ignore */ 1334 break; 1335 case CISCO_KEEPALIVE_REQ: 1336 sp->pp_alivecnt = 0; 1337 sp->pp_rseq[IDX_LCP] = ntohl(h->par1); 1338 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 1339 /* Local and remote sequence numbers are equal. 1340 * Probably, the line is in loopback mode. */ 1341 if (sp->pp_loopcnt >= LOOPALIVECNT) { 1342 printf ("%s: loopback\n", 1343 ifp->if_xname); 1344 sp->pp_loopcnt = 0; 1345 if (ifp->if_flags & IFF_UP) { 1346 SPPP_UNLOCK(sp); 1347 if_down(ifp); 1348 SPPP_LOCK(sp, RW_WRITER); 1349 1350 IF_PURGE(&sp->pp_cpq); 1351 } 1352 } 1353 ++sp->pp_loopcnt; 1354 1355 /* Generate new local sequence number */ 1356 sp->pp_seq[IDX_LCP] = cprng_fast32(); 1357 break; 1358 } 1359 sp->pp_loopcnt = 0; 1360 if (! (ifp->if_flags & IFF_UP) && 1361 (ifp->if_flags & IFF_RUNNING)) { 1362 SPPP_UNLOCK(sp); 1363 if_up(ifp); 1364 SPPP_LOCK(sp, RW_WRITER); 1365 } 1366 break; 1367 case CISCO_ADDR_REQ: 1368 #ifdef INET 1369 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1370 if (me != 0L) 1371 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1372 #endif 1373 break; 1374 } 1375 SPPP_UNLOCK(sp); 1376 } 1377 1378 /* 1379 * Send Cisco keepalive packet. 1380 */ 1381 static void 1382 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1383 { 1384 STDDCL; 1385 struct ppp_header *h; 1386 struct cisco_packet *ch; 1387 struct mbuf *m; 1388 uint32_t t; 1389 1390 KASSERT(SPPP_WLOCKED(sp)); 1391 1392 t = time_uptime * 1000; 1393 MGETHDR(m, M_DONTWAIT, MT_DATA); 1394 if (! m) 1395 return; 1396 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1397 m_reset_rcvif(m); 1398 1399 h = mtod(m, struct ppp_header *); 1400 h->address = CISCO_MULTICAST; 1401 h->control = 0; 1402 h->protocol = htons(CISCO_KEEPALIVE); 1403 1404 ch = (struct cisco_packet *)(h + 1); 1405 ch->type = htonl(type); 1406 ch->par1 = htonl(par1); 1407 ch->par2 = htonl(par2); 1408 ch->rel = -1; 1409 1410 ch->time0 = htons((u_short)(t >> 16)); 1411 ch->time1 = htons((u_short) t); 1412 1413 if (debug) 1414 log(LOG_DEBUG, 1415 "%s: cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1416 ifp->if_xname, ntohl(ch->type), ch->par1, 1417 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1418 (u_int)ch->time1); 1419 1420 if (IF_QFULL(&sp->pp_cpq)) { 1421 IF_DROP(&sp->pp_fastq); 1422 IF_DROP(&ifp->if_snd); 1423 m_freem(m); 1424 if_statinc(ifp, if_oerrors); 1425 return; 1426 } 1427 1428 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 1429 IF_ENQUEUE(&sp->pp_cpq, m); 1430 1431 if (! (ifp->if_flags & IFF_OACTIVE)) { 1432 SPPP_UNLOCK(sp); 1433 if_start_lock(ifp); 1434 SPPP_LOCK(sp, RW_WRITER); 1435 } 1436 } 1437 1438 /* 1439 * PPP protocol implementation. 1440 */ 1441 1442 /* 1443 * Send PPP control protocol packet. 1444 */ 1445 static void 1446 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1447 u_char ident, u_short len, void *data) 1448 { 1449 STDDCL; 1450 struct lcp_header *lh; 1451 struct mbuf *m; 1452 size_t pkthdrlen; 1453 1454 KASSERT(SPPP_WLOCKED(sp)); 1455 1456 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1457 1458 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1459 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1460 MGETHDR(m, M_DONTWAIT, MT_DATA); 1461 if (! m) { 1462 return; 1463 } 1464 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1465 m_reset_rcvif(m); 1466 1467 if (sp->pp_flags & PP_NOFRAMING) { 1468 *mtod(m, uint16_t *) = htons(proto); 1469 lh = (struct lcp_header *)(mtod(m, uint8_t *) + 2); 1470 } else { 1471 struct ppp_header *h; 1472 h = mtod(m, struct ppp_header *); 1473 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1474 h->control = PPP_UI; /* Unnumbered Info */ 1475 h->protocol = htons(proto); /* Link Control Protocol */ 1476 lh = (struct lcp_header *)(h + 1); 1477 } 1478 lh->type = type; 1479 lh->ident = ident; 1480 lh->len = htons(LCP_HEADER_LEN + len); 1481 if (len) 1482 memcpy(lh + 1, data, len); 1483 1484 if (debug) { 1485 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 1486 ifp->if_xname, 1487 sppp_proto_name(proto), 1488 sppp_cp_type_name(lh->type), lh->ident, ntohs(lh->len)); 1489 if (len) 1490 sppp_print_bytes((u_char *)(lh + 1), len); 1491 addlog(">\n"); 1492 } 1493 if (IF_QFULL(&sp->pp_cpq)) { 1494 IF_DROP(&sp->pp_fastq); 1495 IF_DROP(&ifp->if_snd); 1496 m_freem(m); 1497 if_statinc(ifp, if_oerrors); 1498 return; 1499 } 1500 1501 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 1502 IF_ENQUEUE(&sp->pp_cpq, m); 1503 1504 1505 if (! (ifp->if_flags & IFF_OACTIVE)) { 1506 SPPP_UNLOCK(sp); 1507 if_start_lock(ifp); 1508 SPPP_LOCK(sp, RW_WRITER); 1509 } 1510 } 1511 1512 /* 1513 * Handle incoming PPP control protocol packets. 1514 */ 1515 static void 1516 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1517 { 1518 STDDCL; 1519 struct lcp_header *h; 1520 int printlen, len = m->m_pkthdr.len; 1521 int rv; 1522 u_char *p; 1523 uint32_t u32; 1524 1525 SPPP_LOCK(sp, RW_WRITER); 1526 1527 if (len < 4) { 1528 if (debug) 1529 log(LOG_DEBUG, 1530 "%s: %s invalid packet length: %d bytes\n", 1531 ifp->if_xname, cp->name, len); 1532 SPPP_UNLOCK(sp); 1533 return; 1534 } 1535 h = mtod(m, struct lcp_header *); 1536 if (debug) { 1537 printlen = ntohs(h->len); 1538 log(LOG_DEBUG, 1539 "%s: %s input(%s): <%s id=0x%x len=%d", 1540 ifp->if_xname, cp->name, 1541 sppp_state_name(sp->state[cp->protoidx]), 1542 sppp_cp_type_name(h->type), h->ident, printlen); 1543 if (len < printlen) 1544 printlen = len; 1545 if (printlen > 4) 1546 sppp_print_bytes((u_char *)(h + 1), printlen - 4); 1547 addlog(">\n"); 1548 } 1549 if (len > ntohs(h->len)) 1550 len = ntohs(h->len); 1551 p = (u_char *)(h + 1); 1552 switch (h->type) { 1553 case CONF_REQ: 1554 if (len < 4) { 1555 if (debug) 1556 addlog("%s: %s invalid conf-req length %d\n", 1557 ifp->if_xname, cp->name, 1558 len); 1559 if_statinc(ifp, if_ierrors); 1560 break; 1561 } 1562 /* handle states where RCR doesn't get a SCA/SCN */ 1563 switch (sp->state[cp->protoidx]) { 1564 case STATE_CLOSING: 1565 case STATE_STOPPING: 1566 SPPP_UNLOCK(sp); 1567 return; 1568 case STATE_CLOSED: 1569 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1570 0, 0); 1571 SPPP_UNLOCK(sp); 1572 return; 1573 } 1574 rv = (cp->RCR)(sp, h, len); 1575 if (rv < 0) { 1576 /* fatal error, shut down */ 1577 (cp->tld)(sp); 1578 sppp_lcp_tlf(sp); 1579 SPPP_UNLOCK(sp); 1580 return; 1581 } 1582 switch (sp->state[cp->protoidx]) { 1583 case STATE_OPENED: 1584 (cp->tld)(sp); 1585 (cp->scr)(sp); 1586 /* fall through... */ 1587 case STATE_ACK_SENT: 1588 case STATE_REQ_SENT: 1589 sppp_cp_change_state(cp, sp, rv? 1590 STATE_ACK_SENT: STATE_REQ_SENT); 1591 break; 1592 case STATE_STOPPED: 1593 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1594 (cp->scr)(sp); 1595 sppp_cp_change_state(cp, sp, rv? 1596 STATE_ACK_SENT: STATE_REQ_SENT); 1597 break; 1598 case STATE_ACK_RCVD: 1599 if (rv) { 1600 sppp_cp_change_state(cp, sp, STATE_OPENED); 1601 if (debug) 1602 log(LOG_DEBUG, "%s: %s tlu\n", 1603 ifp->if_xname, 1604 cp->name); 1605 (cp->tlu)(sp); 1606 } else 1607 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1608 break; 1609 default: 1610 printf("%s: %s illegal %s in state %s\n", 1611 ifp->if_xname, cp->name, 1612 sppp_cp_type_name(h->type), 1613 sppp_state_name(sp->state[cp->protoidx])); 1614 if_statinc(ifp, if_ierrors); 1615 } 1616 break; 1617 case CONF_ACK: 1618 if (h->ident != sp->confid[cp->protoidx]) { 1619 if (debug) 1620 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1621 ifp->if_xname, cp->name, 1622 h->ident, sp->confid[cp->protoidx]); 1623 if_statinc(ifp, if_ierrors); 1624 break; 1625 } 1626 switch (sp->state[cp->protoidx]) { 1627 case STATE_CLOSED: 1628 case STATE_STOPPED: 1629 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1630 break; 1631 case STATE_CLOSING: 1632 case STATE_STOPPING: 1633 break; 1634 case STATE_REQ_SENT: 1635 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1636 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1637 break; 1638 case STATE_OPENED: 1639 (cp->tld)(sp); 1640 /* fall through */ 1641 case STATE_ACK_RCVD: 1642 (cp->scr)(sp); 1643 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1644 break; 1645 case STATE_ACK_SENT: 1646 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1647 sppp_cp_change_state(cp, sp, STATE_OPENED); 1648 if (debug) 1649 log(LOG_DEBUG, "%s: %s tlu\n", 1650 ifp->if_xname, cp->name); 1651 (cp->tlu)(sp); 1652 break; 1653 default: 1654 printf("%s: %s illegal %s in state %s\n", 1655 ifp->if_xname, cp->name, 1656 sppp_cp_type_name(h->type), 1657 sppp_state_name(sp->state[cp->protoidx])); 1658 if_statinc(ifp, if_ierrors); 1659 } 1660 break; 1661 case CONF_NAK: 1662 case CONF_REJ: 1663 if (h->ident != sp->confid[cp->protoidx]) { 1664 if (debug) 1665 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1666 ifp->if_xname, cp->name, 1667 h->ident, sp->confid[cp->protoidx]); 1668 if_statinc(ifp, if_ierrors); 1669 break; 1670 } 1671 if (h->type == CONF_NAK) 1672 (cp->RCN_nak)(sp, h, len); 1673 else /* CONF_REJ */ 1674 (cp->RCN_rej)(sp, h, len); 1675 1676 switch (sp->state[cp->protoidx]) { 1677 case STATE_CLOSED: 1678 case STATE_STOPPED: 1679 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1680 break; 1681 case STATE_REQ_SENT: 1682 case STATE_ACK_SENT: 1683 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1684 (cp->scr)(sp); 1685 break; 1686 case STATE_OPENED: 1687 (cp->tld)(sp); 1688 /* fall through */ 1689 case STATE_ACK_RCVD: 1690 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1691 (cp->scr)(sp); 1692 break; 1693 case STATE_CLOSING: 1694 case STATE_STOPPING: 1695 break; 1696 default: 1697 printf("%s: %s illegal %s in state %s\n", 1698 ifp->if_xname, cp->name, 1699 sppp_cp_type_name(h->type), 1700 sppp_state_name(sp->state[cp->protoidx])); 1701 if_statinc(ifp, if_ierrors); 1702 } 1703 break; 1704 1705 case TERM_REQ: 1706 switch (sp->state[cp->protoidx]) { 1707 case STATE_ACK_RCVD: 1708 case STATE_ACK_SENT: 1709 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1710 /* fall through */ 1711 case STATE_CLOSED: 1712 case STATE_STOPPED: 1713 case STATE_CLOSING: 1714 case STATE_STOPPING: 1715 case STATE_REQ_SENT: 1716 sta: 1717 /* Send Terminate-Ack packet. */ 1718 if (debug) 1719 log(LOG_DEBUG, "%s: %s send terminate-ack\n", 1720 ifp->if_xname, cp->name); 1721 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1722 break; 1723 case STATE_OPENED: 1724 (cp->tld)(sp); 1725 sp->rst_counter[cp->protoidx] = 0; 1726 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1727 goto sta; 1728 default: 1729 printf("%s: %s illegal %s in state %s\n", 1730 ifp->if_xname, cp->name, 1731 sppp_cp_type_name(h->type), 1732 sppp_state_name(sp->state[cp->protoidx])); 1733 if_statinc(ifp, if_ierrors); 1734 } 1735 break; 1736 case TERM_ACK: 1737 switch (sp->state[cp->protoidx]) { 1738 case STATE_CLOSED: 1739 case STATE_STOPPED: 1740 case STATE_REQ_SENT: 1741 case STATE_ACK_SENT: 1742 break; 1743 case STATE_CLOSING: 1744 (cp->tlf)(sp); 1745 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1746 sppp_lcp_check_and_close(sp); 1747 break; 1748 case STATE_STOPPING: 1749 (cp->tlf)(sp); 1750 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1751 sppp_lcp_check_and_close(sp); 1752 break; 1753 case STATE_ACK_RCVD: 1754 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1755 break; 1756 case STATE_OPENED: 1757 (cp->tld)(sp); 1758 (cp->scr)(sp); 1759 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1760 break; 1761 default: 1762 printf("%s: %s illegal %s in state %s\n", 1763 ifp->if_xname, cp->name, 1764 sppp_cp_type_name(h->type), 1765 sppp_state_name(sp->state[cp->protoidx])); 1766 if_statinc(ifp, if_ierrors); 1767 } 1768 break; 1769 case CODE_REJ: 1770 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1771 log(LOG_INFO, 1772 "%s: %s: ignoring RXJ (%s) for code ?, " 1773 "danger will robinson\n", 1774 ifp->if_xname, cp->name, 1775 sppp_cp_type_name(h->type)); 1776 switch (sp->state[cp->protoidx]) { 1777 case STATE_CLOSED: 1778 case STATE_STOPPED: 1779 case STATE_REQ_SENT: 1780 case STATE_ACK_SENT: 1781 case STATE_CLOSING: 1782 case STATE_STOPPING: 1783 case STATE_OPENED: 1784 break; 1785 case STATE_ACK_RCVD: 1786 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1787 break; 1788 default: 1789 printf("%s: %s illegal %s in state %s\n", 1790 ifp->if_xname, cp->name, 1791 sppp_cp_type_name(h->type), 1792 sppp_state_name(sp->state[cp->protoidx])); 1793 if_statinc(ifp, if_ierrors); 1794 } 1795 break; 1796 case PROTO_REJ: 1797 { 1798 int catastrophic; 1799 const struct cp *upper; 1800 int i; 1801 uint16_t proto; 1802 1803 catastrophic = 0; 1804 upper = NULL; 1805 proto = p[0] << 8 | p[1]; 1806 for (i = 0; i < IDX_COUNT; i++) { 1807 if (cps[i]->proto == proto) { 1808 upper = cps[i]; 1809 break; 1810 } 1811 } 1812 if (upper == NULL) 1813 catastrophic++; 1814 1815 if (debug) 1816 log(LOG_INFO, 1817 "%s: %s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1818 ifp->if_xname, cp->name, catastrophic ? '-' : '+', 1819 sppp_cp_type_name(h->type), proto, 1820 upper ? upper->name : "unknown", 1821 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1822 1823 /* 1824 * if we got RXJ+ against conf-req, the peer does not implement 1825 * this particular protocol type. terminate the protocol. 1826 */ 1827 if (upper && !catastrophic) { 1828 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1829 upper->Close(sp); 1830 break; 1831 } 1832 } 1833 1834 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1835 switch (sp->state[cp->protoidx]) { 1836 case STATE_CLOSED: 1837 case STATE_STOPPED: 1838 case STATE_REQ_SENT: 1839 case STATE_ACK_SENT: 1840 case STATE_CLOSING: 1841 case STATE_STOPPING: 1842 case STATE_OPENED: 1843 break; 1844 case STATE_ACK_RCVD: 1845 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1846 break; 1847 default: 1848 printf("%s: %s illegal %s in state %s\n", 1849 ifp->if_xname, cp->name, 1850 sppp_cp_type_name(h->type), 1851 sppp_state_name(sp->state[cp->protoidx])); 1852 if_statinc(ifp, if_ierrors); 1853 } 1854 break; 1855 } 1856 case DISC_REQ: 1857 if (cp->proto != PPP_LCP) 1858 goto illegal; 1859 /* Discard the packet. */ 1860 break; 1861 case ECHO_REQ: 1862 if (cp->proto != PPP_LCP) 1863 goto illegal; 1864 if (sp->state[cp->protoidx] != STATE_OPENED) { 1865 if (debug) 1866 addlog("%s: lcp echo req but lcp closed\n", 1867 ifp->if_xname); 1868 if_statinc(ifp, if_ierrors); 1869 break; 1870 } 1871 if (len < 8) { 1872 if (debug) 1873 addlog("%s: invalid lcp echo request " 1874 "packet length: %d bytes\n", 1875 ifp->if_xname, len); 1876 break; 1877 } 1878 memcpy(&u32, h + 1, sizeof u32); 1879 if (ntohl(u32) == sp->lcp.magic) { 1880 /* Line loopback mode detected. */ 1881 printf("%s: loopback\n", ifp->if_xname); 1882 SPPP_UNLOCK(sp); 1883 if_down(ifp); 1884 SPPP_LOCK(sp, RW_WRITER); 1885 1886 IF_PURGE(&sp->pp_cpq); 1887 1888 /* Shut down the PPP link. */ 1889 /* XXX */ 1890 lcp.Down(sp); 1891 lcp.Up(sp); 1892 break; 1893 } 1894 u32 = htonl(sp->lcp.magic); 1895 memcpy(h + 1, &u32, sizeof u32); 1896 if (debug) 1897 addlog("%s: got lcp echo req, sending echo rep\n", 1898 ifp->if_xname); 1899 sppp_cp_send(sp, PPP_LCP, ECHO_REPLY, h->ident, len - 4, 1900 h + 1); 1901 break; 1902 case ECHO_REPLY: 1903 if (cp->proto != PPP_LCP) 1904 goto illegal; 1905 if (h->ident != sp->lcp.echoid) { 1906 if_statinc(ifp, if_ierrors); 1907 break; 1908 } 1909 if (len < 8) { 1910 if (debug) 1911 addlog("%s: lcp invalid echo reply " 1912 "packet length: %d bytes\n", 1913 ifp->if_xname, len); 1914 break; 1915 } 1916 if (debug) 1917 addlog("%s: lcp got echo rep\n", 1918 ifp->if_xname); 1919 memcpy(&u32, h + 1, sizeof u32); 1920 if (ntohl(u32) != sp->lcp.magic) 1921 sp->pp_alivecnt = 0; 1922 break; 1923 default: 1924 /* Unknown packet type -- send Code-Reject packet. */ 1925 illegal: 1926 if (debug) 1927 addlog("%s: %s send code-rej for 0x%x\n", 1928 ifp->if_xname, cp->name, h->type); 1929 sppp_cp_send(sp, cp->proto, CODE_REJ, 1930 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 1931 if_statinc(ifp, if_ierrors); 1932 } 1933 1934 SPPP_UNLOCK(sp); 1935 } 1936 1937 1938 /* 1939 * The generic part of all Up/Down/Open/Close/TO event handlers. 1940 * Basically, the state transition handling in the automaton. 1941 */ 1942 static void 1943 sppp_up_event(const struct cp *cp, struct sppp *sp) 1944 { 1945 STDDCL; 1946 1947 KASSERT(SPPP_WLOCKED(sp)); 1948 1949 if (debug) 1950 log(LOG_DEBUG, "%s: %s up(%s)\n", 1951 ifp->if_xname, cp->name, 1952 sppp_state_name(sp->state[cp->protoidx])); 1953 1954 switch (sp->state[cp->protoidx]) { 1955 case STATE_INITIAL: 1956 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1957 break; 1958 case STATE_STARTING: 1959 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1960 (cp->scr)(sp); 1961 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1962 break; 1963 default: 1964 printf("%s: %s illegal up in state %s\n", 1965 ifp->if_xname, cp->name, 1966 sppp_state_name(sp->state[cp->protoidx])); 1967 } 1968 } 1969 1970 static void 1971 sppp_down_event(const struct cp *cp, struct sppp *sp) 1972 { 1973 STDDCL; 1974 1975 KASSERT(SPPP_WLOCKED(sp)); 1976 1977 if (debug) 1978 log(LOG_DEBUG, "%s: %s down(%s)\n", 1979 ifp->if_xname, cp->name, 1980 sppp_state_name(sp->state[cp->protoidx])); 1981 1982 switch (sp->state[cp->protoidx]) { 1983 case STATE_CLOSED: 1984 case STATE_CLOSING: 1985 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1986 break; 1987 case STATE_STOPPED: 1988 (cp->tls)(sp); 1989 /* fall through */ 1990 case STATE_STOPPING: 1991 case STATE_REQ_SENT: 1992 case STATE_ACK_RCVD: 1993 case STATE_ACK_SENT: 1994 sppp_cp_change_state(cp, sp, STATE_STARTING); 1995 break; 1996 case STATE_OPENED: 1997 (cp->tld)(sp); 1998 sppp_cp_change_state(cp, sp, STATE_STARTING); 1999 break; 2000 default: 2001 printf("%s: %s illegal down in state %s\n", 2002 ifp->if_xname, cp->name, 2003 sppp_state_name(sp->state[cp->protoidx])); 2004 } 2005 } 2006 2007 2008 static void 2009 sppp_open_event(const struct cp *cp, struct sppp *sp) 2010 { 2011 STDDCL; 2012 2013 KASSERT(SPPP_WLOCKED(sp)); 2014 2015 if (debug) 2016 log(LOG_DEBUG, "%s: %s open(%s)\n", 2017 ifp->if_xname, cp->name, 2018 sppp_state_name(sp->state[cp->protoidx])); 2019 2020 switch (sp->state[cp->protoidx]) { 2021 case STATE_INITIAL: 2022 sppp_cp_change_state(cp, sp, STATE_STARTING); 2023 (cp->tls)(sp); 2024 break; 2025 case STATE_STARTING: 2026 break; 2027 case STATE_CLOSED: 2028 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 2029 (cp->scr)(sp); 2030 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2031 break; 2032 case STATE_STOPPED: 2033 case STATE_STOPPING: 2034 case STATE_REQ_SENT: 2035 case STATE_ACK_RCVD: 2036 case STATE_ACK_SENT: 2037 case STATE_OPENED: 2038 break; 2039 case STATE_CLOSING: 2040 sppp_cp_change_state(cp, sp, STATE_STOPPING); 2041 break; 2042 } 2043 } 2044 2045 2046 static void 2047 sppp_close_event(const struct cp *cp, struct sppp *sp) 2048 { 2049 STDDCL; 2050 2051 KASSERT(SPPP_WLOCKED(sp)); 2052 2053 if (debug) 2054 log(LOG_DEBUG, "%s: %s close(%s)\n", 2055 ifp->if_xname, cp->name, 2056 sppp_state_name(sp->state[cp->protoidx])); 2057 2058 switch (sp->state[cp->protoidx]) { 2059 case STATE_INITIAL: 2060 case STATE_CLOSED: 2061 case STATE_CLOSING: 2062 break; 2063 case STATE_STARTING: 2064 sppp_cp_change_state(cp, sp, STATE_INITIAL); 2065 (cp->tlf)(sp); 2066 break; 2067 case STATE_STOPPED: 2068 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2069 break; 2070 case STATE_STOPPING: 2071 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2072 break; 2073 case STATE_OPENED: 2074 (cp->tld)(sp); 2075 /* fall through */ 2076 case STATE_REQ_SENT: 2077 case STATE_ACK_RCVD: 2078 case STATE_ACK_SENT: 2079 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 2080 sppp_cp_send(sp, cp->proto, TERM_REQ, 2081 ++sp->pp_seq[cp->protoidx], 0, 0); 2082 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2083 break; 2084 } 2085 } 2086 2087 static void 2088 sppp_to_event(const struct cp *cp, struct sppp *sp) 2089 { 2090 STDDCL; 2091 int s; 2092 2093 KASSERT(SPPP_WLOCKED(sp)); 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->state[cp->protoidx]), 2101 sp->rst_counter[cp->protoidx]); 2102 2103 if (--sp->rst_counter[cp->protoidx] < 0) 2104 /* TO- event */ 2105 switch (sp->state[cp->protoidx]) { 2106 case STATE_CLOSING: 2107 (cp->tlf)(sp); 2108 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2109 sppp_lcp_check_and_close(sp); 2110 break; 2111 case STATE_STOPPING: 2112 (cp->tlf)(sp); 2113 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2114 sppp_lcp_check_and_close(sp); 2115 break; 2116 case STATE_REQ_SENT: 2117 case STATE_ACK_RCVD: 2118 case STATE_ACK_SENT: 2119 (cp->tlf)(sp); 2120 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2121 sppp_lcp_check_and_close(sp); 2122 break; 2123 } 2124 else 2125 /* TO+ event */ 2126 switch (sp->state[cp->protoidx]) { 2127 case STATE_CLOSING: 2128 case STATE_STOPPING: 2129 sppp_cp_send(sp, cp->proto, TERM_REQ, 2130 ++sp->pp_seq[cp->protoidx], 0, 0); 2131 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 2132 cp->TO, sp); 2133 break; 2134 case STATE_REQ_SENT: 2135 case STATE_ACK_RCVD: 2136 (cp->scr)(sp); 2137 /* sppp_cp_change_state() will restart the timer */ 2138 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2139 break; 2140 case STATE_ACK_SENT: 2141 (cp->scr)(sp); 2142 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 2143 cp->TO, sp); 2144 break; 2145 } 2146 2147 splx(s); 2148 } 2149 2150 /* 2151 * Change the state of a control protocol in the state automaton. 2152 * Takes care of starting/stopping the restart timer. 2153 */ 2154 void 2155 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 2156 { 2157 2158 KASSERT(SPPP_WLOCKED(sp)); 2159 2160 sp->state[cp->protoidx] = newstate; 2161 callout_stop(&sp->ch[cp->protoidx]); 2162 switch (newstate) { 2163 case STATE_INITIAL: 2164 case STATE_STARTING: 2165 case STATE_CLOSED: 2166 case STATE_STOPPED: 2167 case STATE_OPENED: 2168 break; 2169 case STATE_CLOSING: 2170 case STATE_STOPPING: 2171 case STATE_REQ_SENT: 2172 case STATE_ACK_RCVD: 2173 case STATE_ACK_SENT: 2174 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 2175 cp->TO, sp); 2176 break; 2177 } 2178 } 2179 2180 /* 2181 *--------------------------------------------------------------------------* 2182 * * 2183 * The LCP implementation. * 2184 * * 2185 *--------------------------------------------------------------------------* 2186 */ 2187 static void 2188 sppp_lcp_init(struct sppp *sp) 2189 { 2190 2191 KASSERT(SPPP_WLOCKED(sp)); 2192 2193 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 2194 sp->lcp.magic = 0; 2195 sp->state[IDX_LCP] = STATE_INITIAL; 2196 sp->fail_counter[IDX_LCP] = 0; 2197 sp->pp_seq[IDX_LCP] = 0; 2198 sp->pp_rseq[IDX_LCP] = 0; 2199 sp->lcp.protos = 0; 2200 2201 /* 2202 * Initialize counters and timeout values. Note that we don't 2203 * use the 3 seconds suggested in RFC 1661 since we are likely 2204 * running on a fast link. XXX We should probably implement 2205 * the exponential backoff option. Note that these values are 2206 * relevant for all control protocols, not just LCP only. 2207 */ 2208 sp->lcp.timeout = 1 * hz; 2209 sp->lcp.max_terminate = 2; 2210 sp->lcp.max_configure = 10; 2211 sp->lcp.max_failure = 10; 2212 callout_init(&sp->ch[IDX_LCP], CALLOUT_MPSAFE); 2213 } 2214 2215 static void 2216 sppp_lcp_up(struct sppp *sp) 2217 { 2218 STDDCL; 2219 2220 KASSERT(SPPP_WLOCKED(sp)); 2221 2222 /* Initialize activity timestamp: opening a connection is an activity */ 2223 sp->pp_last_receive = sp->pp_last_activity = time_uptime; 2224 2225 /* 2226 * If this interface is passive or dial-on-demand, and we are 2227 * still in Initial state, it means we've got an incoming 2228 * call. Activate the interface. 2229 */ 2230 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2231 if (debug) 2232 log(LOG_DEBUG, 2233 "%s: Up event", ifp->if_xname); 2234 ifp->if_flags |= IFF_RUNNING; 2235 if (sp->state[IDX_LCP] == STATE_INITIAL) { 2236 if (debug) 2237 addlog("(incoming call)\n"); 2238 sp->pp_flags |= PP_CALLIN; 2239 lcp.Open(sp); 2240 } else if (debug) 2241 addlog("\n"); 2242 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 && 2243 (sp->state[IDX_LCP] == STATE_INITIAL)) { 2244 ifp->if_flags |= IFF_RUNNING; 2245 lcp.Open(sp); 2246 } 2247 2248 sppp_up_event(&lcp, sp); 2249 } 2250 2251 static void 2252 sppp_lcp_down(struct sppp *sp) 2253 { 2254 STDDCL; 2255 2256 KASSERT(SPPP_WLOCKED(sp)); 2257 2258 sppp_down_event(&lcp, sp); 2259 2260 /* 2261 * If this is neither a dial-on-demand nor a passive 2262 * interface, simulate an ``ifconfig down'' action, so the 2263 * administrator can force a redial by another ``ifconfig 2264 * up''. XXX For leased line operation, should we immediately 2265 * try to reopen the connection here? 2266 */ 2267 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2268 if (debug) 2269 log(LOG_INFO, 2270 "%s: Down event (carrier loss), taking interface down.\n", 2271 ifp->if_xname); 2272 SPPP_UNLOCK(sp); 2273 if_down(ifp); 2274 SPPP_LOCK(sp, RW_WRITER); 2275 } else { 2276 if (debug) 2277 log(LOG_DEBUG, 2278 "%s: Down event (carrier loss)\n", 2279 ifp->if_xname); 2280 } 2281 sp->fail_counter[IDX_LCP] = 0; 2282 sp->pp_flags &= ~PP_CALLIN; 2283 if (sp->state[IDX_LCP] != STATE_INITIAL) 2284 lcp.Close(sp); 2285 ifp->if_flags &= ~IFF_RUNNING; 2286 } 2287 2288 static void 2289 sppp_lcp_open(struct sppp *sp) 2290 { 2291 2292 KASSERT(SPPP_WLOCKED(sp)); 2293 2294 if (sp->pp_if.if_mtu < PP_MTU) { 2295 sp->lcp.mru = sp->pp_if.if_mtu; 2296 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2297 } else 2298 sp->lcp.mru = PP_MTU; 2299 sp->lcp.their_mru = PP_MTU; 2300 2301 /* 2302 * If we are authenticator, negotiate LCP_AUTH 2303 */ 2304 if (sp->hisauth.proto != 0) 2305 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2306 else 2307 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2308 sp->pp_flags &= ~PP_NEEDAUTH; 2309 sppp_open_event(&lcp, sp); 2310 } 2311 2312 static void 2313 sppp_lcp_close(struct sppp *sp) 2314 { 2315 2316 KASSERT(SPPP_WLOCKED(sp)); 2317 sppp_close_event(&lcp, sp); 2318 } 2319 2320 static void 2321 sppp_lcp_TO(void *cookie) 2322 { 2323 struct sppp *sp = (struct sppp*)cookie; 2324 2325 SPPP_LOCK(sp, RW_WRITER); 2326 sppp_to_event(&lcp, sp); 2327 SPPP_UNLOCK(sp); 2328 } 2329 2330 /* 2331 * Analyze a configure request. Return true if it was agreeable, and 2332 * caused action sca, false if it has been rejected or nak'ed, and 2333 * caused action scn. (The return value is used to make the state 2334 * transition decision in the state automaton.) 2335 */ 2336 static int 2337 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2338 { 2339 STDDCL; 2340 u_char *buf, *r, *p, l, blen; 2341 int origlen, rlen; 2342 uint32_t nmagic; 2343 u_short authproto; 2344 2345 KASSERT(SPPP_WLOCKED(sp)); 2346 2347 len -= 4; 2348 origlen = len; 2349 buf = r = malloc (blen = len, M_TEMP, M_NOWAIT); 2350 if (! buf) 2351 return (0); 2352 2353 if (debug) 2354 log(LOG_DEBUG, "%s: lcp parse opts:", 2355 ifp->if_xname); 2356 2357 /* pass 1: check for things that need to be rejected */ 2358 p = (void *)(h + 1); 2359 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2360 /* Sanity check option length */ 2361 if (l > len) { 2362 /* 2363 * Malicious option - drop immediately. 2364 * XXX Maybe we should just RXJ it? 2365 */ 2366 addlog("%s: received malicious LCP option 0x%02x, " 2367 "length 0x%02x, (len: 0x%02x) dropping.\n", ifp->if_xname, 2368 p[0], l, len); 2369 goto drop; 2370 } 2371 if (debug) 2372 addlog(" %s", sppp_lcp_opt_name(*p)); 2373 switch (*p) { 2374 case LCP_OPT_MAGIC: 2375 /* Magic number. */ 2376 /* fall through, both are same length */ 2377 case LCP_OPT_ASYNC_MAP: 2378 /* Async control character map. */ 2379 if (len >= 6 || l == 6) 2380 continue; 2381 if (debug) 2382 addlog(" [invalid]"); 2383 break; 2384 case LCP_OPT_MP_EID: 2385 if (len >= l && l >= 3) { 2386 if (debug) 2387 addlog(" [rej]"); 2388 break; 2389 } 2390 if (debug) 2391 addlog(" [invalid]"); 2392 break; 2393 case LCP_OPT_MP_SSNHF: 2394 if (len >= 2 && l == 2) { 2395 if (debug) 2396 addlog(" [rej]"); 2397 break; 2398 } 2399 if (debug) 2400 addlog(" [invalid]"); 2401 break; 2402 case LCP_OPT_MP_MRRU: 2403 /* Multilink maximum received reconstructed unit */ 2404 /* should be fall through, both are same length */ 2405 /* for now, check, then reject anyway */ 2406 if (len >= 4 && l == 4) { 2407 if (debug) 2408 addlog(" %d [rej]", (p[2] <<8) + p[3]); 2409 break; 2410 } 2411 if (debug) 2412 addlog(" [invalid]"); 2413 break; 2414 case LCP_OPT_MRU: 2415 /* Maximum receive unit. */ 2416 if (len >= 4 && l == 4) 2417 continue; 2418 if (debug) 2419 addlog(" [invalid]"); 2420 break; 2421 case LCP_OPT_AUTH_PROTO: 2422 if (len < 4) { 2423 if (debug) 2424 addlog(" [invalid]"); 2425 break; 2426 } 2427 authproto = (p[2] << 8) + p[3]; 2428 if (authproto == PPP_CHAP && l != 5) { 2429 if (debug) 2430 addlog(" [invalid chap len]"); 2431 break; 2432 } 2433 if (sp->myauth.proto == 0) { 2434 /* we are not configured to do auth */ 2435 if (debug) 2436 addlog(" [not configured]"); 2437 break; 2438 } 2439 /* 2440 * Remote want us to authenticate, remember this, 2441 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2442 * up. 2443 */ 2444 sp->pp_flags |= PP_NEEDAUTH; 2445 continue; 2446 default: 2447 /* Others not supported. */ 2448 if (debug) 2449 addlog(" [rej]"); 2450 break; 2451 } 2452 if (rlen + l > blen) { 2453 if (debug) 2454 addlog(" [overflow]"); 2455 continue; 2456 } 2457 /* Add the option to rejected list. */ 2458 memcpy(r, p, l); 2459 r += l; 2460 rlen += l; 2461 } 2462 if (rlen) { 2463 if (debug) 2464 addlog(" send conf-rej\n"); 2465 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2466 goto end; 2467 } else if (debug) 2468 addlog("\n"); 2469 2470 /* 2471 * pass 2: check for option values that are unacceptable and 2472 * thus require to be nak'ed. 2473 */ 2474 if (debug) 2475 log(LOG_DEBUG, "%s: lcp parse opt values: ", 2476 ifp->if_xname); 2477 2478 p = (void *)(h + 1); 2479 len = origlen; 2480 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2481 if (debug) 2482 addlog(" %s", sppp_lcp_opt_name(*p)); 2483 switch (*p) { 2484 case LCP_OPT_MAGIC: 2485 /* Magic number -- extract. */ 2486 nmagic = (uint32_t)p[2] << 24 | 2487 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2488 if (nmagic != sp->lcp.magic) { 2489 if (debug) 2490 addlog(" 0x%x", nmagic); 2491 continue; 2492 } 2493 /* 2494 * Local and remote magics equal -- loopback? 2495 */ 2496 if (sp->pp_loopcnt >= LOOPALIVECNT*5) { 2497 printf ("%s: loopback\n", 2498 ifp->if_xname); 2499 sp->pp_loopcnt = 0; 2500 if (ifp->if_flags & IFF_UP) { 2501 SPPP_UNLOCK(sp); 2502 if_down(ifp); 2503 SPPP_LOCK(sp, RW_WRITER); 2504 2505 IF_PURGE(&sp->pp_cpq); 2506 /* XXX ? */ 2507 lcp.Down(sp); 2508 lcp.Up(sp); 2509 } 2510 } else if (debug) 2511 addlog(" [glitch]"); 2512 ++sp->pp_loopcnt; 2513 /* 2514 * We negate our magic here, and NAK it. If 2515 * we see it later in an NAK packet, we 2516 * suggest a new one. 2517 */ 2518 nmagic = ~sp->lcp.magic; 2519 /* Gonna NAK it. */ 2520 p[2] = nmagic >> 24; 2521 p[3] = nmagic >> 16; 2522 p[4] = nmagic >> 8; 2523 p[5] = nmagic; 2524 break; 2525 2526 case LCP_OPT_ASYNC_MAP: 2527 /* 2528 * Async control character map -- just ignore it. 2529 * 2530 * Quote from RFC 1662, chapter 6: 2531 * To enable this functionality, synchronous PPP 2532 * implementations MUST always respond to the 2533 * Async-Control-Character-Map Configuration 2534 * Option with the LCP Configure-Ack. However, 2535 * acceptance of the Configuration Option does 2536 * not imply that the synchronous implementation 2537 * will do any ACCM mapping. Instead, all such 2538 * octet mapping will be performed by the 2539 * asynchronous-to-synchronous converter. 2540 */ 2541 continue; 2542 2543 case LCP_OPT_MRU: 2544 /* 2545 * Maximum receive unit. Always agreeable, 2546 * but ignored by now. 2547 */ 2548 sp->lcp.their_mru = p[2] * 256 + p[3]; 2549 if (debug) 2550 addlog(" %ld", sp->lcp.their_mru); 2551 continue; 2552 2553 case LCP_OPT_AUTH_PROTO: 2554 authproto = (p[2] << 8) + p[3]; 2555 if (sp->myauth.proto != authproto) { 2556 /* not agreed, nak */ 2557 if (debug) 2558 addlog(" [mine %s != his %s]", 2559 sppp_proto_name(sp->myauth.proto), 2560 sppp_proto_name(authproto)); 2561 p[2] = sp->myauth.proto >> 8; 2562 p[3] = sp->myauth.proto; 2563 break; 2564 } 2565 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2566 if (debug) 2567 addlog(" [chap not MD5]"); 2568 p[4] = CHAP_MD5; 2569 break; 2570 } 2571 continue; 2572 } 2573 if (rlen + l > blen) { 2574 if (debug) 2575 addlog(" [overflow]"); 2576 continue; 2577 } 2578 /* Add the option to nak'ed list. */ 2579 memcpy(r, p, l); 2580 r += l; 2581 rlen += l; 2582 } 2583 if (rlen) { 2584 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2585 if (debug) 2586 addlog(" max_failure (%d) exceeded, " 2587 "send conf-rej\n", 2588 sp->lcp.max_failure); 2589 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2590 } else { 2591 if (debug) 2592 addlog(" send conf-nak\n"); 2593 sppp_cp_send(sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2594 } 2595 goto end; 2596 } else { 2597 if (debug) 2598 addlog(" send conf-ack\n"); 2599 sp->fail_counter[IDX_LCP] = 0; 2600 sp->pp_loopcnt = 0; 2601 sppp_cp_send(sp, PPP_LCP, CONF_ACK, h->ident, origlen, h + 1); 2602 } 2603 2604 end: 2605 free(buf, M_TEMP); 2606 return (rlen == 0); 2607 2608 drop: 2609 free(buf, M_TEMP); 2610 return -1; 2611 } 2612 2613 /* 2614 * Analyze the LCP Configure-Reject option list, and adjust our 2615 * negotiation. 2616 */ 2617 static void 2618 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2619 { 2620 STDDCL; 2621 u_char *buf, *p, l; 2622 2623 KASSERT(SPPP_WLOCKED(sp)); 2624 2625 len -= 4; 2626 buf = malloc (len, M_TEMP, M_NOWAIT); 2627 if (!buf) 2628 return; 2629 2630 if (debug) 2631 log(LOG_DEBUG, "%s: lcp rej opts:", 2632 ifp->if_xname); 2633 2634 p = (void *)(h + 1); 2635 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2636 /* Sanity check option length */ 2637 if (l > len) { 2638 /* 2639 * Malicious option - drop immediately. 2640 * XXX Maybe we should just RXJ it? 2641 */ 2642 addlog("%s: received malicious LCP option, " 2643 "dropping.\n", ifp->if_xname); 2644 goto drop; 2645 } 2646 if (debug) 2647 addlog(" %s", sppp_lcp_opt_name(*p)); 2648 switch (*p) { 2649 case LCP_OPT_MAGIC: 2650 /* Magic number -- can't use it, use 0 */ 2651 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2652 sp->lcp.magic = 0; 2653 break; 2654 case LCP_OPT_MRU: 2655 /* 2656 * We try to negotiate a lower MRU if the underlying 2657 * link's MTU is less than PP_MTU (e.g. PPPoE). If the 2658 * peer rejects this lower rate, fallback to the 2659 * default. 2660 */ 2661 if (debug) { 2662 addlog("%s: warning: peer rejected our MRU of " 2663 "%ld bytes. Defaulting to %d bytes\n", 2664 ifp->if_xname, sp->lcp.mru, PP_MTU); 2665 } 2666 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2667 sp->lcp.mru = PP_MTU; 2668 break; 2669 case LCP_OPT_AUTH_PROTO: 2670 /* 2671 * Peer doesn't want to authenticate himself, 2672 * deny unless this is a dialout call, and 2673 * SPPP_AUTHFLAG_NOCALLOUT is set. 2674 */ 2675 if ((sp->pp_flags & PP_CALLIN) == 0 && 2676 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2677 if (debug) 2678 addlog(" [don't insist on auth " 2679 "for callout]"); 2680 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2681 break; 2682 } 2683 if (debug) 2684 addlog("[access denied]\n"); 2685 lcp.Close(sp); 2686 break; 2687 } 2688 } 2689 if (debug) 2690 addlog("\n"); 2691 drop: 2692 free(buf, M_TEMP); 2693 return; 2694 } 2695 2696 /* 2697 * Analyze the LCP Configure-NAK option list, and adjust our 2698 * negotiation. 2699 */ 2700 static void 2701 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2702 { 2703 STDDCL; 2704 u_char *buf, *p, l, blen; 2705 uint32_t magic; 2706 2707 KASSERT(SPPP_WLOCKED(sp)); 2708 2709 len -= 4; 2710 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 2711 if (!buf) 2712 return; 2713 2714 if (debug) 2715 log(LOG_DEBUG, "%s: lcp nak opts:", 2716 ifp->if_xname); 2717 2718 p = (void *)(h + 1); 2719 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2720 /* Sanity check option length */ 2721 if (l > len) { 2722 /* 2723 * Malicious option - drop immediately. 2724 * XXX Maybe we should just RXJ it? 2725 */ 2726 addlog("%s: received malicious LCP option, " 2727 "dropping.\n", ifp->if_xname); 2728 goto drop; 2729 } 2730 if (debug) 2731 addlog(" %s", sppp_lcp_opt_name(*p)); 2732 switch (*p) { 2733 case LCP_OPT_MAGIC: 2734 /* Magic number -- renegotiate */ 2735 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2736 len >= 6 && l == 6) { 2737 magic = (uint32_t)p[2] << 24 | 2738 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2739 /* 2740 * If the remote magic is our negated one, 2741 * this looks like a loopback problem. 2742 * Suggest a new magic to make sure. 2743 */ 2744 if (magic == ~sp->lcp.magic) { 2745 if (debug) 2746 addlog(" magic glitch"); 2747 sp->lcp.magic = cprng_fast32(); 2748 } else { 2749 sp->lcp.magic = magic; 2750 if (debug) 2751 addlog(" %d", magic); 2752 } 2753 } 2754 break; 2755 case LCP_OPT_MRU: 2756 /* 2757 * Peer wants to advise us to negotiate an MRU. 2758 * Agree on it if it's reasonable, or use 2759 * default otherwise. 2760 */ 2761 if (len >= 4 && l == 4) { 2762 u_int mru = p[2] * 256 + p[3]; 2763 if (debug) 2764 addlog(" %d", mru); 2765 if (mru < PPP_MINMRU || mru > sp->pp_if.if_mtu) 2766 mru = sp->pp_if.if_mtu; 2767 sp->lcp.mru = mru; 2768 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2769 } 2770 break; 2771 case LCP_OPT_AUTH_PROTO: 2772 /* 2773 * Peer doesn't like our authentication method, 2774 * deny. 2775 */ 2776 if (debug) 2777 addlog("[access denied]\n"); 2778 lcp.Close(sp); 2779 break; 2780 } 2781 } 2782 if (debug) 2783 addlog("\n"); 2784 drop: 2785 free(buf, M_TEMP); 2786 return; 2787 } 2788 2789 static void 2790 sppp_lcp_tlu(struct sppp *sp) 2791 { 2792 struct ifnet *ifp = &sp->pp_if; 2793 int i; 2794 uint32_t mask; 2795 2796 KASSERT(SPPP_WLOCKED(sp)); 2797 2798 /* XXX ? */ 2799 if (! (ifp->if_flags & IFF_UP) && 2800 (ifp->if_flags & IFF_RUNNING)) { 2801 /* Coming out of loopback mode. */ 2802 SPPP_UNLOCK(sp); 2803 if_up(ifp); 2804 SPPP_LOCK(sp, RW_WRITER); 2805 } 2806 2807 for (i = 0; i < IDX_COUNT; i++) 2808 if ((cps[i])->flags & CP_QUAL) 2809 (cps[i])->Open(sp); 2810 2811 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2812 (sp->pp_flags & PP_NEEDAUTH) != 0) 2813 sppp_change_phase(sp, SPPP_PHASE_AUTHENTICATE); 2814 else 2815 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 2816 2817 /* 2818 * Open all authentication protocols. This is even required 2819 * if we already proceeded to network phase, since it might be 2820 * that remote wants us to authenticate, so we might have to 2821 * send a PAP request. Undesired authentication protocols 2822 * don't do anything when they get an Open event. 2823 */ 2824 for (i = 0; i < IDX_COUNT; i++) 2825 if ((cps[i])->flags & CP_AUTH) 2826 (cps[i])->Open(sp); 2827 2828 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2829 /* Notify all NCPs. */ 2830 for (i = 0; i < IDX_COUNT; i++) 2831 if ((cps[i])->flags & CP_NCP) 2832 (cps[i])->Open(sp); 2833 } 2834 2835 /* Send Up events to all started protos. */ 2836 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) { 2837 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2838 (cps[i])->Up(sp); 2839 } 2840 } 2841 2842 /* notify low-level driver of state change */ 2843 sppp_notify_chg_wlocked(sp); 2844 2845 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2846 /* if no NCP is starting, close down */ 2847 sppp_lcp_check_and_close(sp); 2848 } 2849 2850 static void 2851 sppp_lcp_tld(struct sppp *sp) 2852 { 2853 int i; 2854 uint32_t mask; 2855 2856 KASSERT(SPPP_WLOCKED(sp)); 2857 2858 sppp_change_phase(sp, SPPP_PHASE_TERMINATE); 2859 2860 /* 2861 * Take upper layers down. We send the Down event first and 2862 * the Close second to prevent the upper layers from sending 2863 * ``a flurry of terminate-request packets'', as the RFC 2864 * describes it. 2865 */ 2866 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) { 2867 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2868 (cps[i])->Down(sp); 2869 (cps[i])->Close(sp); 2870 } 2871 } 2872 } 2873 2874 static void 2875 sppp_lcp_tls(struct sppp *sp) 2876 { 2877 2878 KASSERT(SPPP_WLOCKED(sp)); 2879 2880 2881 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2882 printf("%s: authentication failed %d times, not retrying again\n", 2883 sp->pp_if.if_xname, sp->pp_auth_failures); 2884 2885 SPPP_UNLOCK(sp); 2886 if_down(&sp->pp_if); 2887 SPPP_LOCK(sp, RW_WRITER); 2888 return; 2889 } 2890 2891 sppp_change_phase(sp, SPPP_PHASE_ESTABLISH); 2892 2893 /* Notify lower layer if desired. */ 2894 sppp_notify_tls_wlocked(sp); 2895 } 2896 2897 static void 2898 sppp_lcp_tlf(struct sppp *sp) 2899 { 2900 2901 KASSERT(SPPP_WLOCKED(sp)); 2902 2903 sppp_change_phase(sp, SPPP_PHASE_DEAD); 2904 2905 /* Notify lower layer if desired. */ 2906 sppp_notify_tlf_wlocked(sp); 2907 } 2908 2909 static void 2910 sppp_lcp_scr(struct sppp *sp) 2911 { 2912 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2913 int i = 0; 2914 u_short authproto; 2915 2916 KASSERT(SPPP_WLOCKED(sp)); 2917 2918 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2919 if (! sp->lcp.magic) 2920 sp->lcp.magic = cprng_fast32(); 2921 opt[i++] = LCP_OPT_MAGIC; 2922 opt[i++] = 6; 2923 opt[i++] = sp->lcp.magic >> 24; 2924 opt[i++] = sp->lcp.magic >> 16; 2925 opt[i++] = sp->lcp.magic >> 8; 2926 opt[i++] = sp->lcp.magic; 2927 } 2928 2929 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2930 opt[i++] = LCP_OPT_MRU; 2931 opt[i++] = 4; 2932 opt[i++] = sp->lcp.mru >> 8; 2933 opt[i++] = sp->lcp.mru; 2934 } 2935 2936 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2937 authproto = sp->hisauth.proto; 2938 opt[i++] = LCP_OPT_AUTH_PROTO; 2939 opt[i++] = authproto == PPP_CHAP? 5: 4; 2940 opt[i++] = authproto >> 8; 2941 opt[i++] = authproto; 2942 if (authproto == PPP_CHAP) 2943 opt[i++] = CHAP_MD5; 2944 } 2945 2946 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2947 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2948 } 2949 2950 /* 2951 * Check the open NCPs, return true if at least one NCP is open. 2952 */ 2953 static int 2954 sppp_ncp_check(struct sppp *sp) 2955 { 2956 int i, mask; 2957 2958 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2959 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2960 return 1; 2961 return 0; 2962 } 2963 2964 /* 2965 * Re-check the open NCPs and see if we should terminate the link. 2966 * Called by the NCPs during their tlf action handling. 2967 */ 2968 static void 2969 sppp_lcp_check_and_close(struct sppp *sp) 2970 { 2971 2972 KASSERT(SPPP_WLOCKED(sp)); 2973 2974 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2975 /* don't bother, we are already going down */ 2976 return; 2977 2978 if (sppp_ncp_check(sp)) 2979 return; 2980 lcp.Close(sp); 2981 } 2982 2983 2984 /* 2985 *--------------------------------------------------------------------------* 2986 * * 2987 * The IPCP implementation. * 2988 * * 2989 *--------------------------------------------------------------------------* 2990 */ 2991 2992 static void 2993 sppp_ipcp_init(struct sppp *sp) 2994 { 2995 int error; 2996 2997 KASSERT(SPPP_WLOCKED(sp)); 2998 2999 sp->ipcp.opts = 0; 3000 sp->ipcp.flags = 0; 3001 sp->state[IDX_IPCP] = STATE_INITIAL; 3002 sp->fail_counter[IDX_IPCP] = 0; 3003 sp->pp_seq[IDX_IPCP] = 0; 3004 sp->pp_rseq[IDX_IPCP] = 0; 3005 callout_init(&sp->ch[IDX_IPCP], CALLOUT_MPSAFE); 3006 3007 error = workqueue_create(&sp->ipcp.update_addrs_wq, "ipcp_addr", 3008 sppp_update_ip_addrs_work, sp, PRI_SOFTNET, IPL_NET, 0); 3009 if (error) 3010 panic("%s: update_addrs workqueue_create failed (%d)\n", 3011 __func__, error); 3012 sp->ipcp.update_addrs_q = pcq_create(IPCP_UPDATE_LIMIT, KM_SLEEP); 3013 3014 sp->ipcp.update_addrs_enqueued = 0; 3015 } 3016 3017 static void 3018 sppp_ipcp_up(struct sppp *sp) 3019 { 3020 KASSERT(SPPP_WLOCKED(sp)); 3021 sppp_up_event(&ipcp, sp); 3022 } 3023 3024 static void 3025 sppp_ipcp_down(struct sppp *sp) 3026 { 3027 KASSERT(SPPP_WLOCKED(sp)); 3028 sppp_down_event(&ipcp, sp); 3029 } 3030 3031 static void 3032 sppp_ipcp_open(struct sppp *sp) 3033 { 3034 STDDCL; 3035 uint32_t myaddr, hisaddr; 3036 3037 KASSERT(SPPP_WLOCKED(sp)); 3038 3039 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 3040 sp->ipcp.req_myaddr = 0; 3041 sp->ipcp.req_hisaddr = 0; 3042 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 3043 3044 #ifdef INET 3045 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3046 #else 3047 myaddr = hisaddr = 0; 3048 #endif 3049 /* 3050 * If we don't have his address, this probably means our 3051 * interface doesn't want to talk IP at all. (This could 3052 * be the case if somebody wants to speak only IPX, for 3053 * example.) Don't open IPCP in this case. 3054 */ 3055 if (hisaddr == 0) { 3056 /* XXX this message should go away */ 3057 if (debug) 3058 log(LOG_DEBUG, "%s: ipcp_open(): no IP interface\n", 3059 ifp->if_xname); 3060 return; 3061 } 3062 3063 if (myaddr == 0) { 3064 /* 3065 * I don't have an assigned address, so i need to 3066 * negotiate my address. 3067 */ 3068 sp->ipcp.flags |= IPCP_MYADDR_DYN; 3069 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3070 } 3071 if (hisaddr == 1) { 3072 /* 3073 * XXX - remove this hack! 3074 * remote has no valid address, we need to get one assigned. 3075 */ 3076 sp->ipcp.flags |= IPCP_HISADDR_DYN; 3077 } 3078 sppp_open_event(&ipcp, sp); 3079 } 3080 3081 static void 3082 sppp_ipcp_close(struct sppp *sp) 3083 { 3084 3085 KASSERT(SPPP_WLOCKED(sp)); 3086 3087 sppp_close_event(&ipcp, sp); 3088 3089 #ifdef INET 3090 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 3091 /* 3092 * Some address was dynamic, clear it again. 3093 */ 3094 sppp_clear_ip_addrs(sp); 3095 #endif 3096 } 3097 3098 static void 3099 sppp_ipcp_TO(void *cookie) 3100 { 3101 struct sppp *sp = cookie; 3102 3103 SPPP_LOCK(sp, RW_WRITER); 3104 sppp_to_event(&ipcp, sp); 3105 SPPP_UNLOCK(sp); 3106 } 3107 3108 /* 3109 * Analyze a configure request. Return true if it was agreeable, and 3110 * caused action sca, false if it has been rejected or nak'ed, and 3111 * caused action scn. (The return value is used to make the state 3112 * transition decision in the state automaton.) 3113 */ 3114 static int 3115 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3116 { 3117 u_char *buf, *r, *p, l, blen; 3118 struct ifnet *ifp = &sp->pp_if; 3119 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3120 uint32_t hisaddr, desiredaddr; 3121 3122 KASSERT(SPPP_WLOCKED(sp)); 3123 3124 len -= 4; 3125 origlen = len; 3126 /* 3127 * Make sure to allocate a buf that can at least hold a 3128 * conf-nak with an `address' option. We might need it below. 3129 */ 3130 blen = len < 6 ? 6 : len; 3131 buf = r = malloc (blen, M_TEMP, M_NOWAIT); 3132 if (! buf) 3133 return (0); 3134 3135 /* pass 1: see if we can recognize them */ 3136 if (debug) 3137 log(LOG_DEBUG, "%s: ipcp parse opts:", 3138 ifp->if_xname); 3139 p = (void *)(h + 1); 3140 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3141 /* Sanity check option length */ 3142 if (l > len) { 3143 /* XXX should we just RXJ? */ 3144 addlog("%s: malicious IPCP option received, dropping\n", 3145 ifp->if_xname); 3146 goto drop; 3147 } 3148 if (debug) 3149 addlog(" %s", sppp_ipcp_opt_name(*p)); 3150 switch (*p) { 3151 #ifdef notyet 3152 case IPCP_OPT_COMPRESSION: 3153 if (len >= 6 && l >= 6) { 3154 /* correctly formed compress option */ 3155 continue; 3156 } 3157 if (debug) 3158 addlog(" [invalid]"); 3159 break; 3160 #endif 3161 case IPCP_OPT_ADDRESS: 3162 if (len >= 6 && l == 6) { 3163 /* correctly formed address option */ 3164 continue; 3165 } 3166 if (debug) 3167 addlog(" [invalid]"); 3168 break; 3169 default: 3170 /* Others not supported. */ 3171 if (debug) 3172 addlog(" [rej]"); 3173 break; 3174 } 3175 /* Add the option to rejected list. */ 3176 if (rlen + l > blen) { 3177 if (debug) 3178 addlog(" [overflow]"); 3179 continue; 3180 } 3181 memcpy(r, p, l); 3182 r += l; 3183 rlen += l; 3184 } 3185 if (rlen) { 3186 if (debug) 3187 addlog(" send conf-rej\n"); 3188 sppp_cp_send(sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 3189 goto end; 3190 } else if (debug) 3191 addlog("\n"); 3192 3193 /* pass 2: parse option values */ 3194 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 3195 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 3196 else 3197 #ifdef INET 3198 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 3199 #else 3200 hisaddr = 0; 3201 #endif 3202 if (debug) 3203 log(LOG_DEBUG, "%s: ipcp parse opt values: ", 3204 ifp->if_xname); 3205 p = (void *)(h + 1); 3206 len = origlen; 3207 for (rlen=0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3208 if (debug) 3209 addlog(" %s", sppp_ipcp_opt_name(*p)); 3210 switch (*p) { 3211 #ifdef notyet 3212 case IPCP_OPT_COMPRESSION: 3213 continue; 3214 #endif 3215 case IPCP_OPT_ADDRESS: 3216 desiredaddr = p[2] << 24 | p[3] << 16 | 3217 p[4] << 8 | p[5]; 3218 if (desiredaddr == hisaddr || 3219 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 3220 /* 3221 * Peer's address is same as our value, 3222 * this is agreeable. Gonna conf-ack 3223 * it. 3224 */ 3225 if (debug) 3226 addlog(" %s [ack]", 3227 sppp_dotted_quad(hisaddr)); 3228 /* record that we've seen it already */ 3229 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 3230 sp->ipcp.req_hisaddr = desiredaddr; 3231 hisaddr = desiredaddr; 3232 continue; 3233 } 3234 /* 3235 * The address wasn't agreeable. This is either 3236 * he sent us 0.0.0.0, asking to assign him an 3237 * address, or he send us another address not 3238 * matching our value. Either case, we gonna 3239 * conf-nak it with our value. 3240 */ 3241 if (debug) { 3242 if (desiredaddr == 0) 3243 addlog(" [addr requested]"); 3244 else 3245 addlog(" %s [not agreed]", 3246 sppp_dotted_quad(desiredaddr)); 3247 } 3248 3249 p[2] = hisaddr >> 24; 3250 p[3] = hisaddr >> 16; 3251 p[4] = hisaddr >> 8; 3252 p[5] = hisaddr; 3253 break; 3254 } 3255 if (rlen + l > blen) { 3256 if (debug) 3257 addlog(" [overflow]"); 3258 continue; 3259 } 3260 /* Add the option to nak'ed list. */ 3261 memcpy(r, p, l); 3262 r += l; 3263 rlen += l; 3264 } 3265 3266 /* 3267 * If we are about to conf-ack the request, but haven't seen 3268 * his address so far, gonna conf-nak it instead, with the 3269 * `address' option present and our idea of his address being 3270 * filled in there, to request negotiation of both addresses. 3271 * 3272 * XXX This can result in an endless req - nak loop if peer 3273 * doesn't want to send us his address. Q: What should we do 3274 * about it? XXX A: implement the max-failure counter. 3275 */ 3276 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 3277 buf[0] = IPCP_OPT_ADDRESS; 3278 buf[1] = 6; 3279 buf[2] = hisaddr >> 24; 3280 buf[3] = hisaddr >> 16; 3281 buf[4] = hisaddr >> 8; 3282 buf[5] = hisaddr; 3283 rlen = 6; 3284 if (debug) 3285 addlog(" still need hisaddr"); 3286 } 3287 3288 if (rlen) { 3289 if (debug) 3290 addlog(" send conf-nak\n"); 3291 sppp_cp_send(sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 3292 } else { 3293 if (debug) 3294 addlog(" send conf-ack\n"); 3295 sppp_cp_send(sp, PPP_IPCP, CONF_ACK, h->ident, origlen, h + 1); 3296 } 3297 3298 end: 3299 free(buf, M_TEMP); 3300 return (rlen == 0); 3301 3302 drop: 3303 free(buf, M_TEMP); 3304 return -1; 3305 } 3306 3307 /* 3308 * Analyze the IPCP Configure-Reject option list, and adjust our 3309 * negotiation. 3310 */ 3311 static void 3312 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3313 { 3314 u_char *buf, *p, l, blen; 3315 struct ifnet *ifp = &sp->pp_if; 3316 int debug = ifp->if_flags & IFF_DEBUG; 3317 3318 KASSERT(SPPP_WLOCKED(sp)); 3319 3320 len -= 4; 3321 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 3322 if (!buf) 3323 return; 3324 3325 if (debug) 3326 log(LOG_DEBUG, "%s: ipcp rej opts:", 3327 ifp->if_xname); 3328 3329 p = (void *)(h + 1); 3330 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3331 /* Sanity check option length */ 3332 if (l > len) { 3333 /* XXX should we just RXJ? */ 3334 addlog("%s: malicious IPCP option received, dropping\n", 3335 ifp->if_xname); 3336 goto drop; 3337 } 3338 if (debug) 3339 addlog(" %s", sppp_ipcp_opt_name(*p)); 3340 switch (*p) { 3341 case IPCP_OPT_ADDRESS: 3342 /* 3343 * Peer doesn't grok address option. This is 3344 * bad. XXX Should we better give up here? 3345 */ 3346 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 3347 break; 3348 #ifdef notyet 3349 case IPCP_OPT_COMPRESS: 3350 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 3351 break; 3352 #endif 3353 } 3354 } 3355 if (debug) 3356 addlog("\n"); 3357 drop: 3358 free(buf, M_TEMP); 3359 return; 3360 } 3361 3362 /* 3363 * Analyze the IPCP Configure-NAK option list, and adjust our 3364 * negotiation. 3365 */ 3366 static void 3367 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3368 { 3369 u_char *p, l; 3370 struct ifnet *ifp = &sp->pp_if; 3371 int debug = ifp->if_flags & IFF_DEBUG; 3372 uint32_t wantaddr; 3373 3374 KASSERT(SPPP_WLOCKED(sp)); 3375 3376 len -= 4; 3377 3378 if (debug) 3379 log(LOG_DEBUG, "%s: ipcp nak opts:", 3380 ifp->if_xname); 3381 3382 p = (void *)(h + 1); 3383 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3384 /* Sanity check option length */ 3385 if (l > len) { 3386 /* XXX should we just RXJ? */ 3387 addlog("%s: malicious IPCP option received, dropping\n", 3388 ifp->if_xname); 3389 return; 3390 } 3391 if (debug) 3392 addlog(" %s", sppp_ipcp_opt_name(*p)); 3393 switch (*p) { 3394 case IPCP_OPT_ADDRESS: 3395 /* 3396 * Peer doesn't like our local IP address. See 3397 * if we can do something for him. We'll drop 3398 * him our address then. 3399 */ 3400 if (len >= 6 && l == 6) { 3401 wantaddr = p[2] << 24 | p[3] << 16 | 3402 p[4] << 8 | p[5]; 3403 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3404 if (debug) 3405 addlog(" [wantaddr %s]", 3406 sppp_dotted_quad(wantaddr)); 3407 /* 3408 * When doing dynamic address assignment, 3409 * we accept his offer. Otherwise, we 3410 * ignore it and thus continue to negotiate 3411 * our already existing value. 3412 */ 3413 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3414 if (debug) 3415 addlog(" [agree]"); 3416 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3417 sp->ipcp.req_myaddr = wantaddr; 3418 } 3419 } 3420 break; 3421 3422 case IPCP_OPT_PRIMDNS: 3423 if (len >= 6 && l == 6) { 3424 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3425 p[4] << 8 | p[5]; 3426 } 3427 break; 3428 3429 case IPCP_OPT_SECDNS: 3430 if (len >= 6 && l == 6) { 3431 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3432 p[4] << 8 | p[5]; 3433 } 3434 break; 3435 #ifdef notyet 3436 case IPCP_OPT_COMPRESS: 3437 /* 3438 * Peer wants different compression parameters. 3439 */ 3440 break; 3441 #endif 3442 } 3443 } 3444 if (debug) 3445 addlog("\n"); 3446 } 3447 3448 static void 3449 sppp_ipcp_tlu(struct sppp *sp) 3450 { 3451 #ifdef INET 3452 KASSERT(SPPP_WLOCKED(sp)); 3453 /* we are up. Set addresses and notify anyone interested */ 3454 sppp_set_ip_addrs(sp); 3455 #endif 3456 } 3457 3458 static void 3459 sppp_ipcp_tld(struct sppp *sp) 3460 { 3461 3462 KASSERT(SPPP_WLOCKED(sp)); 3463 } 3464 3465 static void 3466 sppp_ipcp_tls(struct sppp *sp) 3467 { 3468 3469 KASSERT(SPPP_WLOCKED(sp)); 3470 /* indicate to LCP that it must stay alive */ 3471 sp->lcp.protos |= (1 << IDX_IPCP); 3472 } 3473 3474 static void 3475 sppp_ipcp_tlf(struct sppp *sp) 3476 { 3477 3478 KASSERT(SPPP_WLOCKED(sp)); 3479 3480 /* we no longer need LCP */ 3481 sp->lcp.protos &= ~(1 << IDX_IPCP); 3482 } 3483 3484 static void 3485 sppp_ipcp_scr(struct sppp *sp) 3486 { 3487 uint8_t opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3488 #ifdef INET 3489 uint32_t ouraddr; 3490 #endif 3491 int i = 0; 3492 3493 KASSERT(SPPP_WLOCKED(sp)); 3494 3495 #ifdef notyet 3496 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3497 opt[i++] = IPCP_OPT_COMPRESSION; 3498 opt[i++] = 6; 3499 opt[i++] = 0; /* VJ header compression */ 3500 opt[i++] = 0x2d; /* VJ header compression */ 3501 opt[i++] = max_slot_id; 3502 opt[i++] = comp_slot_id; 3503 } 3504 #endif 3505 3506 #ifdef INET 3507 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3508 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3509 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3510 else 3511 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3512 opt[i++] = IPCP_OPT_ADDRESS; 3513 opt[i++] = 6; 3514 opt[i++] = ouraddr >> 24; 3515 opt[i++] = ouraddr >> 16; 3516 opt[i++] = ouraddr >> 8; 3517 opt[i++] = ouraddr; 3518 } 3519 #endif 3520 3521 if (sp->query_dns & 1) { 3522 opt[i++] = IPCP_OPT_PRIMDNS; 3523 opt[i++] = 6; 3524 opt[i++] = sp->dns_addrs[0] >> 24; 3525 opt[i++] = sp->dns_addrs[0] >> 16; 3526 opt[i++] = sp->dns_addrs[0] >> 8; 3527 opt[i++] = sp->dns_addrs[0]; 3528 } 3529 if (sp->query_dns & 2) { 3530 opt[i++] = IPCP_OPT_SECDNS; 3531 opt[i++] = 6; 3532 opt[i++] = sp->dns_addrs[1] >> 24; 3533 opt[i++] = sp->dns_addrs[1] >> 16; 3534 opt[i++] = sp->dns_addrs[1] >> 8; 3535 opt[i++] = sp->dns_addrs[1]; 3536 } 3537 3538 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3539 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3540 } 3541 3542 3543 /* 3544 *--------------------------------------------------------------------------* 3545 * * 3546 * The IPv6CP implementation. * 3547 * * 3548 *--------------------------------------------------------------------------* 3549 */ 3550 3551 #ifdef INET6 3552 static void 3553 sppp_ipv6cp_init(struct sppp *sp) 3554 { 3555 3556 KASSERT(SPPP_WLOCKED(sp)); 3557 3558 sp->ipv6cp.opts = 0; 3559 sp->ipv6cp.flags = 0; 3560 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3561 sp->fail_counter[IDX_IPV6CP] = 0; 3562 sp->pp_seq[IDX_IPV6CP] = 0; 3563 sp->pp_rseq[IDX_IPV6CP] = 0; 3564 callout_init(&sp->ch[IDX_IPV6CP], CALLOUT_MPSAFE); 3565 } 3566 3567 static void 3568 sppp_ipv6cp_up(struct sppp *sp) 3569 { 3570 3571 KASSERT(SPPP_WLOCKED(sp)); 3572 sppp_up_event(&ipv6cp, sp); 3573 } 3574 3575 static void 3576 sppp_ipv6cp_down(struct sppp *sp) 3577 { 3578 3579 KASSERT(SPPP_WLOCKED(sp)); 3580 sppp_down_event(&ipv6cp, sp); 3581 } 3582 3583 static void 3584 sppp_ipv6cp_open(struct sppp *sp) 3585 { 3586 STDDCL; 3587 struct in6_addr myaddr, hisaddr; 3588 3589 KASSERT(SPPP_WLOCKED(sp)); 3590 3591 #ifdef IPV6CP_MYIFID_DYN 3592 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3593 #else 3594 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3595 #endif 3596 3597 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3598 /* 3599 * If we don't have our address, this probably means our 3600 * interface doesn't want to talk IPv6 at all. (This could 3601 * be the case if somebody wants to speak only IPX, for 3602 * example.) Don't open IPv6CP in this case. 3603 */ 3604 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3605 /* XXX this message should go away */ 3606 if (debug) 3607 log(LOG_DEBUG, "%s: ipv6cp_open(): no IPv6 interface\n", 3608 ifp->if_xname); 3609 return; 3610 } 3611 3612 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3613 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3614 sppp_open_event(&ipv6cp, sp); 3615 } 3616 3617 static void 3618 sppp_ipv6cp_close(struct sppp *sp) 3619 { 3620 3621 KASSERT(SPPP_WLOCKED(sp)); 3622 sppp_close_event(&ipv6cp, sp); 3623 } 3624 3625 static void 3626 sppp_ipv6cp_TO(void *cookie) 3627 { 3628 struct sppp *sp = cookie; 3629 3630 SPPP_LOCK(sp, RW_WRITER); 3631 sppp_to_event(&ipv6cp, sp); 3632 SPPP_UNLOCK(sp); 3633 } 3634 3635 /* 3636 * Analyze a configure request. Return true if it was agreeable, and 3637 * caused action sca, false if it has been rejected or nak'ed, and 3638 * caused action scn. (The return value is used to make the state 3639 * transition decision in the state automaton.) 3640 */ 3641 static int 3642 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3643 { 3644 u_char *buf, *r, *p, l, blen; 3645 struct ifnet *ifp = &sp->pp_if; 3646 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3647 struct in6_addr myaddr, desiredaddr, suggestaddr; 3648 int ifidcount; 3649 int type; 3650 int collision, nohisaddr; 3651 char ip6buf[INET6_ADDRSTRLEN]; 3652 3653 KASSERT(SPPP_WLOCKED(sp)); 3654 3655 len -= 4; 3656 origlen = len; 3657 /* 3658 * Make sure to allocate a buf that can at least hold a 3659 * conf-nak with an `address' option. We might need it below. 3660 */ 3661 blen = len < 6 ? 6 : len; 3662 buf = r = malloc (blen, M_TEMP, M_NOWAIT); 3663 if (! buf) 3664 return (0); 3665 3666 /* pass 1: see if we can recognize them */ 3667 if (debug) 3668 log(LOG_DEBUG, "%s: ipv6cp parse opts:", 3669 ifp->if_xname); 3670 p = (void *)(h + 1); 3671 ifidcount = 0; 3672 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3673 /* Sanity check option length */ 3674 if (l > len) { 3675 /* XXX just RXJ? */ 3676 addlog("%s: received malicious IPCPv6 option, " 3677 "dropping\n", ifp->if_xname); 3678 goto drop; 3679 } 3680 if (debug) 3681 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3682 switch (*p) { 3683 case IPV6CP_OPT_IFID: 3684 if (len >= 10 && l == 10 && ifidcount == 0) { 3685 /* correctly formed address option */ 3686 ifidcount++; 3687 continue; 3688 } 3689 if (debug) 3690 addlog(" [invalid]"); 3691 break; 3692 #ifdef notyet 3693 case IPV6CP_OPT_COMPRESSION: 3694 if (len >= 4 && l >= 4) { 3695 /* correctly formed compress option */ 3696 continue; 3697 } 3698 if (debug) 3699 addlog(" [invalid]"); 3700 break; 3701 #endif 3702 default: 3703 /* Others not supported. */ 3704 if (debug) 3705 addlog(" [rej]"); 3706 break; 3707 } 3708 if (rlen + l > blen) { 3709 if (debug) 3710 addlog(" [overflow]"); 3711 continue; 3712 } 3713 /* Add the option to rejected list. */ 3714 memcpy(r, p, l); 3715 r += l; 3716 rlen += l; 3717 } 3718 if (rlen) { 3719 if (debug) 3720 addlog(" send conf-rej\n"); 3721 sppp_cp_send(sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3722 goto end; 3723 } else if (debug) 3724 addlog("\n"); 3725 3726 /* pass 2: parse option values */ 3727 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3728 if (debug) 3729 log(LOG_DEBUG, "%s: ipv6cp parse opt values: ", 3730 ifp->if_xname); 3731 p = (void *)(h + 1); 3732 len = origlen; 3733 type = CONF_ACK; 3734 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3735 if (debug) 3736 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3737 switch (*p) { 3738 #ifdef notyet 3739 case IPV6CP_OPT_COMPRESSION: 3740 continue; 3741 #endif 3742 case IPV6CP_OPT_IFID: 3743 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3744 memcpy(&desiredaddr.s6_addr[8], &p[2], 8); 3745 collision = (memcmp(&desiredaddr.s6_addr[8], 3746 &myaddr.s6_addr[8], 8) == 0); 3747 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3748 3749 desiredaddr.s6_addr16[0] = htons(0xfe80); 3750 (void)in6_setscope(&desiredaddr, &sp->pp_if, NULL); 3751 3752 if (!collision && !nohisaddr) { 3753 /* no collision, hisaddr known - Conf-Ack */ 3754 type = CONF_ACK; 3755 3756 if (debug) { 3757 addlog(" %s [%s]", 3758 IN6_PRINT(ip6buf, &desiredaddr), 3759 sppp_cp_type_name(type)); 3760 } 3761 continue; 3762 } 3763 3764 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3765 if (collision && nohisaddr) { 3766 /* collision, hisaddr unknown - Conf-Rej */ 3767 type = CONF_REJ; 3768 memset(&p[2], 0, 8); 3769 } else { 3770 /* 3771 * - no collision, hisaddr unknown, or 3772 * - collision, hisaddr known 3773 * Conf-Nak, suggest hisaddr 3774 */ 3775 type = CONF_NAK; 3776 sppp_suggest_ip6_addr(sp, &suggestaddr); 3777 memcpy(&p[2], &suggestaddr.s6_addr[8], 8); 3778 } 3779 if (debug) 3780 addlog(" %s [%s]", IN6_PRINT(ip6buf, &desiredaddr), 3781 sppp_cp_type_name(type)); 3782 break; 3783 } 3784 if (rlen + l > blen) { 3785 if (debug) 3786 addlog(" [overflow]"); 3787 continue; 3788 } 3789 /* Add the option to nak'ed list. */ 3790 memcpy(r, p, l); 3791 r += l; 3792 rlen += l; 3793 } 3794 3795 if (rlen == 0 && type == CONF_ACK) { 3796 if (debug) 3797 addlog(" send %s\n", sppp_cp_type_name(type)); 3798 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, origlen, h + 1); 3799 } else { 3800 #ifdef notdef 3801 if (type == CONF_ACK) 3802 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3803 #endif 3804 3805 if (debug) { 3806 addlog(" send %s suggest %s\n", 3807 sppp_cp_type_name(type), IN6_PRINT(ip6buf, &suggestaddr)); 3808 } 3809 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3810 } 3811 3812 end: 3813 free(buf, M_TEMP); 3814 return (rlen == 0); 3815 3816 drop: 3817 free(buf, M_TEMP); 3818 return -1; 3819 } 3820 3821 /* 3822 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3823 * negotiation. 3824 */ 3825 static void 3826 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3827 { 3828 u_char *buf, *p, l, blen; 3829 struct ifnet *ifp = &sp->pp_if; 3830 int debug = ifp->if_flags & IFF_DEBUG; 3831 3832 KASSERT(SPPP_WLOCKED(sp)); 3833 3834 len -= 4; 3835 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 3836 if (!buf) 3837 return; 3838 3839 if (debug) 3840 log(LOG_DEBUG, "%s: ipv6cp rej opts:", 3841 ifp->if_xname); 3842 3843 p = (void *)(h + 1); 3844 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3845 if (l > len) { 3846 /* XXX just RXJ? */ 3847 addlog("%s: received malicious IPCPv6 option, " 3848 "dropping\n", ifp->if_xname); 3849 goto drop; 3850 } 3851 if (debug) 3852 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3853 switch (*p) { 3854 case IPV6CP_OPT_IFID: 3855 /* 3856 * Peer doesn't grok address option. This is 3857 * bad. XXX Should we better give up here? 3858 */ 3859 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3860 break; 3861 #ifdef notyet 3862 case IPV6CP_OPT_COMPRESS: 3863 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3864 break; 3865 #endif 3866 } 3867 } 3868 if (debug) 3869 addlog("\n"); 3870 drop: 3871 free(buf, M_TEMP); 3872 return; 3873 } 3874 3875 /* 3876 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3877 * negotiation. 3878 */ 3879 static void 3880 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3881 { 3882 u_char *buf, *p, l, blen; 3883 struct ifnet *ifp = &sp->pp_if; 3884 int debug = ifp->if_flags & IFF_DEBUG; 3885 struct in6_addr suggestaddr; 3886 char ip6buf[INET6_ADDRSTRLEN]; 3887 3888 KASSERT(SPPP_WLOCKED(sp)); 3889 3890 len -= 4; 3891 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 3892 if (!buf) 3893 return; 3894 3895 if (debug) 3896 log(LOG_DEBUG, "%s: ipv6cp nak opts:", 3897 ifp->if_xname); 3898 3899 p = (void *)(h + 1); 3900 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3901 if (l > len) { 3902 /* XXX just RXJ? */ 3903 addlog("%s: received malicious IPCPv6 option, " 3904 "dropping\n", ifp->if_xname); 3905 goto drop; 3906 } 3907 if (debug) 3908 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3909 switch (*p) { 3910 case IPV6CP_OPT_IFID: 3911 /* 3912 * Peer doesn't like our local ifid. See 3913 * if we can do something for him. We'll drop 3914 * him our address then. 3915 */ 3916 if (len < 10 || l != 10) 3917 break; 3918 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3919 suggestaddr.s6_addr16[0] = htons(0xfe80); 3920 (void)in6_setscope(&suggestaddr, &sp->pp_if, NULL); 3921 memcpy(&suggestaddr.s6_addr[8], &p[2], 8); 3922 3923 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3924 if (debug) 3925 addlog(" [suggestaddr %s]", 3926 IN6_PRINT(ip6buf, &suggestaddr)); 3927 #ifdef IPV6CP_MYIFID_DYN 3928 /* 3929 * When doing dynamic address assignment, 3930 * we accept his offer. 3931 */ 3932 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3933 struct in6_addr lastsuggest; 3934 /* 3935 * If <suggested myaddr from peer> equals to 3936 * <hisaddr we have suggested last time>, 3937 * we have a collision. generate new random 3938 * ifid. 3939 */ 3940 sppp_suggest_ip6_addr(&lastsuggest); 3941 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3942 lastsuggest)) { 3943 if (debug) 3944 addlog(" [random]"); 3945 sppp_gen_ip6_addr(sp, &suggestaddr); 3946 } 3947 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3948 if (debug) 3949 addlog(" [agree]"); 3950 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3951 } 3952 #else 3953 /* 3954 * Since we do not do dynamic address assignment, 3955 * we ignore it and thus continue to negotiate 3956 * our already existing value. This can possibly 3957 * go into infinite request-reject loop. 3958 * 3959 * This is not likely because we normally use 3960 * ifid based on MAC-address. 3961 * If you have no ethernet card on the node, too bad. 3962 * XXX should we use fail_counter? 3963 */ 3964 #endif 3965 break; 3966 #ifdef notyet 3967 case IPV6CP_OPT_COMPRESS: 3968 /* 3969 * Peer wants different compression parameters. 3970 */ 3971 break; 3972 #endif 3973 } 3974 } 3975 if (debug) 3976 addlog("\n"); 3977 drop: 3978 free(buf, M_TEMP); 3979 return; 3980 } 3981 3982 static void 3983 sppp_ipv6cp_tlu(struct sppp *sp) 3984 { 3985 3986 KASSERT(SPPP_WLOCKED(sp)); 3987 /* we are up - notify isdn daemon */ 3988 sppp_notify_con_wlocked(sp); 3989 } 3990 3991 static void 3992 sppp_ipv6cp_tld(struct sppp *sp) 3993 { 3994 3995 KASSERT(SPPP_WLOCKED(sp)); 3996 } 3997 3998 static void 3999 sppp_ipv6cp_tls(struct sppp *sp) 4000 { 4001 4002 KASSERT(SPPP_WLOCKED(sp)); 4003 /* indicate to LCP that it must stay alive */ 4004 sp->lcp.protos |= (1 << IDX_IPV6CP); 4005 } 4006 4007 static void 4008 sppp_ipv6cp_tlf(struct sppp *sp) 4009 { 4010 4011 KASSERT(SPPP_WLOCKED(sp)); 4012 /* we no longer need LCP */ 4013 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 4014 } 4015 4016 static void 4017 sppp_ipv6cp_scr(struct sppp *sp) 4018 { 4019 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 4020 struct in6_addr ouraddr; 4021 int i = 0; 4022 4023 KASSERT(SPPP_WLOCKED(sp)); 4024 4025 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 4026 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 4027 opt[i++] = IPV6CP_OPT_IFID; 4028 opt[i++] = 10; 4029 memcpy(&opt[i], &ouraddr.s6_addr[8], 8); 4030 i += 8; 4031 } 4032 4033 #ifdef notyet 4034 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 4035 opt[i++] = IPV6CP_OPT_COMPRESSION; 4036 opt[i++] = 4; 4037 opt[i++] = 0; /* TBD */ 4038 opt[i++] = 0; /* TBD */ 4039 /* variable length data may follow */ 4040 } 4041 #endif 4042 4043 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 4044 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 4045 } 4046 #else /*INET6*/ 4047 static void 4048 sppp_ipv6cp_init(struct sppp *sp) 4049 { 4050 4051 KASSERT(SPPP_WLOCKED(sp)); 4052 } 4053 4054 static void 4055 sppp_ipv6cp_up(struct sppp *sp) 4056 { 4057 4058 KASSERT(SPPP_WLOCKED(sp)); 4059 } 4060 4061 static void 4062 sppp_ipv6cp_down(struct sppp *sp) 4063 { 4064 4065 KASSERT(SPPP_WLOCKED(sp)); 4066 } 4067 4068 static void 4069 sppp_ipv6cp_open(struct sppp *sp) 4070 { 4071 4072 KASSERT(SPPP_WLOCKED(sp)); 4073 } 4074 4075 static void 4076 sppp_ipv6cp_close(struct sppp *sp) 4077 { 4078 4079 KASSERT(SPPP_WLOCKED(sp)); 4080 } 4081 4082 static void 4083 sppp_ipv6cp_TO(void *cookie) 4084 { 4085 struct sppp *sp __diagused = cookie; 4086 4087 KASSERT(SPPP_WLOCKED(sp)); 4088 } 4089 4090 static int 4091 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, 4092 int len) 4093 { 4094 4095 KASSERT(SPPP_WLOCKED(sp)); 4096 return 0; 4097 } 4098 4099 static void 4100 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, 4101 int len) 4102 { 4103 4104 KASSERT(SPPP_WLOCKED(sp)); 4105 } 4106 4107 static void 4108 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, 4109 int len) 4110 { 4111 4112 KASSERT(SPPP_WLOCKED(sp)); 4113 } 4114 4115 static void 4116 sppp_ipv6cp_tlu(struct sppp *sp) 4117 { 4118 4119 KASSERT(SPPP_WLOCKED(sp)); 4120 } 4121 4122 static void 4123 sppp_ipv6cp_tld(struct sppp *sp) 4124 { 4125 4126 KASSERT(SPPP_WLOCKED(sp)); 4127 } 4128 4129 static void 4130 sppp_ipv6cp_tls(struct sppp *sp) 4131 { 4132 4133 KASSERT(SPPP_WLOCKED(sp)); 4134 } 4135 4136 static void 4137 sppp_ipv6cp_tlf(struct sppp *sp) 4138 { 4139 4140 KASSERT(SPPP_WLOCKED(sp)); 4141 } 4142 4143 static void 4144 sppp_ipv6cp_scr(struct sppp *sp) 4145 { 4146 4147 KASSERT(SPPP_WLOCKED(sp)); 4148 } 4149 #endif /*INET6*/ 4150 4151 4152 /* 4153 *--------------------------------------------------------------------------* 4154 * * 4155 * The CHAP implementation. * 4156 * * 4157 *--------------------------------------------------------------------------* 4158 */ 4159 4160 /* 4161 * The authentication protocols don't employ a full-fledged state machine as 4162 * the control protocols do, since they do have Open and Close events, but 4163 * not Up and Down, nor are they explicitly terminated. Also, use of the 4164 * authentication protocols may be different in both directions (this makes 4165 * sense, think of a machine that never accepts incoming calls but only 4166 * calls out, it doesn't require the called party to authenticate itself). 4167 * 4168 * Our state machine for the local authentication protocol (we are requesting 4169 * the peer to authenticate) looks like: 4170 * 4171 * RCA- 4172 * +--------------------------------------------+ 4173 * V scn,tld| 4174 * +--------+ Close +---------+ RCA+ 4175 * | |<----------------------------------| |------+ 4176 * +--->| Closed | TO* | Opened | sca | 4177 * | | |-----+ +-------| |<-----+ 4178 * | +--------+ irc | | +---------+ 4179 * | ^ | | ^ 4180 * | | | | | 4181 * | | | | | 4182 * | TO-| | | | 4183 * | |tld TO+ V | | 4184 * | | +------->+ | | 4185 * | | | | | | 4186 * | +--------+ V | | 4187 * | | |<----+<--------------------+ | 4188 * | | Req- | scr | 4189 * | | Sent | | 4190 * | | | | 4191 * | +--------+ | 4192 * | RCA- | | RCA+ | 4193 * +------+ +------------------------------------------+ 4194 * scn,tld sca,irc,ict,tlu 4195 * 4196 * 4197 * with: 4198 * 4199 * Open: LCP reached authentication phase 4200 * Close: LCP reached terminate phase 4201 * 4202 * RCA+: received reply (pap-req, chap-response), acceptable 4203 * RCN: received reply (pap-req, chap-response), not acceptable 4204 * TO+: timeout with restart counter >= 0 4205 * TO-: timeout with restart counter < 0 4206 * TO*: reschedule timeout for CHAP 4207 * 4208 * scr: send request packet (none for PAP, chap-challenge) 4209 * sca: send ack packet (pap-ack, chap-success) 4210 * scn: send nak packet (pap-nak, chap-failure) 4211 * ict: initialize re-challenge timer (CHAP only) 4212 * 4213 * tlu: this-layer-up, LCP reaches network phase 4214 * tld: this-layer-down, LCP enters terminate phase 4215 * 4216 * Note that in CHAP mode, after sending a new challenge, while the state 4217 * automaton falls back into Req-Sent state, it doesn't signal a tld 4218 * event to LCP, so LCP remains in network phase. Only after not getting 4219 * any response (or after getting an unacceptable response), CHAP closes, 4220 * causing LCP to enter terminate phase. 4221 * 4222 * With PAP, there is no initial request that can be sent. The peer is 4223 * expected to send one based on the successful negotiation of PAP as 4224 * the authentication protocol during the LCP option negotiation. 4225 * 4226 * Incoming authentication protocol requests (remote requests 4227 * authentication, we are peer) don't employ a state machine at all, 4228 * they are simply answered. Some peers [Ascend P50 firmware rev 4229 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 4230 * still in authentication phase (thereby violating the standard that 4231 * demands that these NCP packets are to be discarded), so we keep 4232 * track of the peer demanding us to authenticate, and only proceed to 4233 * phase network once we've seen a positive acknowledge for the 4234 * authentication. 4235 */ 4236 4237 /* 4238 * Handle incoming CHAP packets. 4239 */ 4240 void 4241 sppp_chap_input(struct sppp *sp, struct mbuf *m) 4242 { 4243 STDDCL; 4244 struct lcp_header *h; 4245 int len, x; 4246 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 4247 int value_len, name_len; 4248 MD5_CTX ctx; 4249 4250 len = m->m_pkthdr.len; 4251 if (len < 4) { 4252 if (debug) 4253 log(LOG_DEBUG, 4254 "%s: chap invalid packet length: %d bytes\n", 4255 ifp->if_xname, len); 4256 return; 4257 } 4258 h = mtod(m, struct lcp_header *); 4259 if (len > ntohs(h->len)) 4260 len = ntohs(h->len); 4261 4262 SPPP_LOCK(sp, RW_WRITER); 4263 4264 switch (h->type) { 4265 /* challenge, failure and success are his authproto */ 4266 case CHAP_CHALLENGE: 4267 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4268 /* can't do anything useful */ 4269 sp->pp_auth_failures++; 4270 printf("%s: chap input without my name and my secret being set\n", 4271 ifp->if_xname); 4272 break; 4273 } 4274 value = 1 + (u_char *)(h + 1); 4275 value_len = value[-1]; 4276 name = value + value_len; 4277 name_len = len - value_len - 5; 4278 if (name_len < 0) { 4279 if (debug) { 4280 log(LOG_DEBUG, 4281 "%s: chap corrupted challenge " 4282 "<%s id=0x%x len=%d", 4283 ifp->if_xname, 4284 sppp_auth_type_name(PPP_CHAP, h->type), 4285 h->ident, ntohs(h->len)); 4286 if (len > 4) 4287 sppp_print_bytes((u_char *)(h + 1), 4288 len - 4); 4289 addlog(">\n"); 4290 } 4291 break; 4292 } 4293 4294 if (debug) { 4295 log(LOG_DEBUG, 4296 "%s: chap input <%s id=0x%x len=%d name=", 4297 ifp->if_xname, 4298 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 4299 ntohs(h->len)); 4300 sppp_print_string((char *) name, name_len); 4301 addlog(" value-size=%d value=", value_len); 4302 sppp_print_bytes(value, value_len); 4303 addlog(">\n"); 4304 } 4305 4306 /* Compute reply value. */ 4307 MD5Init(&ctx); 4308 MD5Update(&ctx, &h->ident, 1); 4309 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 4310 MD5Update(&ctx, value, value_len); 4311 MD5Final(digest, &ctx); 4312 dsize = sizeof digest; 4313 4314 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 4315 sizeof dsize, (const char *)&dsize, 4316 sizeof digest, digest, 4317 sp->myauth.name_len, 4318 sp->myauth.name, 4319 0); 4320 break; 4321 4322 case CHAP_SUCCESS: 4323 if (debug) { 4324 log(LOG_DEBUG, "%s: chap success", 4325 ifp->if_xname); 4326 if (len > 4) { 4327 addlog(": "); 4328 sppp_print_string((char *)(h + 1), len - 4); 4329 } 4330 addlog("\n"); 4331 } 4332 x = splnet(); 4333 sp->pp_auth_failures = 0; 4334 sp->pp_flags &= ~PP_NEEDAUTH; 4335 if (sp->myauth.proto == PPP_CHAP && 4336 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4337 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 4338 /* 4339 * We are authenticator for CHAP but didn't 4340 * complete yet. Leave it to tlu to proceed 4341 * to network phase. 4342 */ 4343 splx(x); 4344 break; 4345 } 4346 splx(x); 4347 sppp_phase_network(sp); 4348 break; 4349 4350 case CHAP_FAILURE: 4351 x = splnet(); 4352 sp->pp_auth_failures++; 4353 splx(x); 4354 if (debug) { 4355 log(LOG_INFO, "%s: chap failure", 4356 ifp->if_xname); 4357 if (len > 4) { 4358 addlog(": "); 4359 sppp_print_string((char *)(h + 1), len - 4); 4360 } 4361 addlog("\n"); 4362 } else 4363 log(LOG_INFO, "%s: chap failure\n", 4364 ifp->if_xname); 4365 /* await LCP shutdown by authenticator */ 4366 break; 4367 4368 /* response is my authproto */ 4369 case CHAP_RESPONSE: 4370 if (sp->hisauth.secret == NULL) { 4371 /* can't do anything useful */ 4372 printf("%s: chap input without his secret being set\n", 4373 ifp->if_xname); 4374 break; 4375 } 4376 value = 1 + (u_char *)(h + 1); 4377 value_len = value[-1]; 4378 name = value + value_len; 4379 name_len = len - value_len - 5; 4380 if (name_len < 0) { 4381 if (debug) { 4382 log(LOG_DEBUG, 4383 "%s: chap corrupted response " 4384 "<%s id=0x%x len=%d", 4385 ifp->if_xname, 4386 sppp_auth_type_name(PPP_CHAP, h->type), 4387 h->ident, ntohs(h->len)); 4388 if (len > 4) 4389 sppp_print_bytes((u_char *)(h + 1), 4390 len - 4); 4391 addlog(">\n"); 4392 } 4393 break; 4394 } 4395 if (h->ident != sp->confid[IDX_CHAP]) { 4396 if (debug) 4397 log(LOG_DEBUG, 4398 "%s: chap dropping response for old ID " 4399 "(got %d, expected %d)\n", 4400 ifp->if_xname, 4401 h->ident, sp->confid[IDX_CHAP]); 4402 break; 4403 } 4404 if (sp->hisauth.name != NULL && 4405 (name_len != sp->hisauth.name_len 4406 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 4407 log(LOG_INFO, "%s: chap response, his name ", 4408 ifp->if_xname); 4409 sppp_print_string(name, name_len); 4410 addlog(" != expected "); 4411 sppp_print_string(sp->hisauth.name, 4412 sp->hisauth.name_len); 4413 addlog("\n"); 4414 goto chap_failure; 4415 } 4416 if (debug) { 4417 log(LOG_DEBUG, "%s: chap input(%s) " 4418 "<%s id=0x%x len=%d name=", 4419 ifp->if_xname, 4420 sppp_state_name(sp->state[IDX_CHAP]), 4421 sppp_auth_type_name(PPP_CHAP, h->type), 4422 h->ident, ntohs(h->len)); 4423 sppp_print_string((char *)name, name_len); 4424 addlog(" value-size=%d value=", value_len); 4425 sppp_print_bytes(value, value_len); 4426 addlog(">\n"); 4427 } 4428 if (value_len != sizeof(sp->hisauth.challenge)) { 4429 if (debug) 4430 log(LOG_DEBUG, 4431 "%s: chap bad hash value length: " 4432 "%d bytes, should be %zu\n", 4433 ifp->if_xname, value_len, 4434 sizeof(sp->hisauth.challenge)); 4435 goto chap_failure; 4436 } 4437 4438 MD5Init(&ctx); 4439 MD5Update(&ctx, &h->ident, 1); 4440 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 4441 MD5Update(&ctx, sp->hisauth.challenge, sizeof(sp->hisauth.challenge)); 4442 MD5Final(digest, &ctx); 4443 4444 #define FAILMSG "Failed..." 4445 #define SUCCMSG "Welcome!" 4446 4447 if (value_len != sizeof digest || 4448 memcmp(digest, value, value_len) != 0) { 4449 chap_failure: 4450 KASSERT(SPPP_WLOCKED(sp)); 4451 /* action scn, tld */ 4452 sp->pp_auth_failures++; 4453 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 4454 sizeof(FAILMSG) - 1, (const u_char *)FAILMSG, 4455 0); 4456 chap.tld(sp); 4457 break; 4458 } 4459 sp->pp_auth_failures = 0; 4460 /* action sca, perhaps tlu */ 4461 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 4462 sp->state[IDX_CHAP] == STATE_OPENED) 4463 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 4464 sizeof(SUCCMSG) - 1, (const u_char *)SUCCMSG, 4465 0); 4466 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 4467 sppp_cp_change_state(&chap, sp, STATE_OPENED); 4468 chap.tlu(sp); 4469 } 4470 break; 4471 4472 default: 4473 /* Unknown CHAP packet type -- ignore. */ 4474 if (debug) { 4475 log(LOG_DEBUG, "%s: chap unknown input(%s) " 4476 "<0x%x id=0x%xh len=%d", 4477 ifp->if_xname, 4478 sppp_state_name(sp->state[IDX_CHAP]), 4479 h->type, h->ident, ntohs(h->len)); 4480 if (len > 4) 4481 sppp_print_bytes((u_char *)(h + 1), len - 4); 4482 addlog(">\n"); 4483 } 4484 break; 4485 4486 } 4487 4488 SPPP_UNLOCK(sp); 4489 } 4490 4491 static void 4492 sppp_chap_init(struct sppp *sp) 4493 { 4494 4495 KASSERT(SPPP_WLOCKED(sp)); 4496 4497 /* Chap doesn't have STATE_INITIAL at all. */ 4498 sp->state[IDX_CHAP] = STATE_CLOSED; 4499 sp->fail_counter[IDX_CHAP] = 0; 4500 sp->pp_seq[IDX_CHAP] = 0; 4501 sp->pp_rseq[IDX_CHAP] = 0; 4502 callout_init(&sp->ch[IDX_CHAP], CALLOUT_MPSAFE); 4503 } 4504 4505 static void 4506 sppp_chap_open(struct sppp *sp) 4507 { 4508 4509 KASSERT(SPPP_WLOCKED(sp)); 4510 if (sp->hisauth.proto == PPP_CHAP && 4511 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4512 /* we are authenticator for CHAP, start it */ 4513 chap.scr(sp); 4514 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4515 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4516 } 4517 /* nothing to be done if we are peer, await a challenge */ 4518 } 4519 4520 static void 4521 sppp_chap_close(struct sppp *sp) 4522 { 4523 4524 KASSERT(SPPP_WLOCKED(sp)); 4525 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4526 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4527 } 4528 4529 static void 4530 sppp_chap_TO(void *cookie) 4531 { 4532 struct sppp *sp = (struct sppp *)cookie; 4533 STDDCL; 4534 int s; 4535 4536 s = splnet(); 4537 4538 SPPP_LOCK(sp, RW_WRITER); 4539 4540 if (debug) 4541 log(LOG_DEBUG, "%s: chap TO(%s) rst_counter = %d\n", 4542 ifp->if_xname, 4543 sppp_state_name(sp->state[IDX_CHAP]), 4544 sp->rst_counter[IDX_CHAP]); 4545 4546 if (--sp->rst_counter[IDX_CHAP] < 0) 4547 /* TO- event */ 4548 switch (sp->state[IDX_CHAP]) { 4549 case STATE_REQ_SENT: 4550 chap.tld(sp); 4551 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4552 break; 4553 } 4554 else 4555 /* TO+ (or TO*) event */ 4556 switch (sp->state[IDX_CHAP]) { 4557 case STATE_OPENED: 4558 /* TO* event */ 4559 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4560 /* fall through */ 4561 case STATE_REQ_SENT: 4562 chap.scr(sp); 4563 /* sppp_cp_change_state() will restart the timer */ 4564 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4565 break; 4566 } 4567 4568 SPPP_UNLOCK(sp); 4569 splx(s); 4570 } 4571 4572 static void 4573 sppp_chap_tlu(struct sppp *sp) 4574 { 4575 STDDCL; 4576 int i, x; 4577 4578 KASSERT(SPPP_WLOCKED(sp)); 4579 4580 i = 0; 4581 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4582 4583 /* 4584 * Some broken CHAP implementations (Conware CoNet, firmware 4585 * 4.0.?) don't want to re-authenticate their CHAP once the 4586 * initial challenge-response exchange has taken place. 4587 * Provide for an option to avoid rechallenges. 4588 */ 4589 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4590 /* 4591 * Compute the re-challenge timeout. This will yield 4592 * a number between 300 and 810 seconds. 4593 */ 4594 i = 300 + ((unsigned)(cprng_fast32() & 0xff00) >> 7); 4595 4596 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4597 } 4598 4599 if (debug) { 4600 log(LOG_DEBUG, 4601 "%s: chap %s, ", 4602 ifp->if_xname, 4603 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu"); 4604 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) 4605 addlog("next re-challenge in %d seconds\n", i); 4606 else 4607 addlog("re-challenging suppressed\n"); 4608 } 4609 4610 x = splnet(); 4611 sp->pp_auth_failures = 0; 4612 /* indicate to LCP that we need to be closed down */ 4613 sp->lcp.protos |= (1 << IDX_CHAP); 4614 4615 if (sp->pp_flags & PP_NEEDAUTH) { 4616 /* 4617 * Remote is authenticator, but his auth proto didn't 4618 * complete yet. Defer the transition to network 4619 * phase. 4620 */ 4621 splx(x); 4622 return; 4623 } 4624 splx(x); 4625 4626 /* 4627 * If we are already in phase network, we are done here. This 4628 * is the case if this is a dummy tlu event after a re-challenge. 4629 */ 4630 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4631 sppp_phase_network(sp); 4632 } 4633 4634 static void 4635 sppp_chap_tld(struct sppp *sp) 4636 { 4637 STDDCL; 4638 4639 KASSERT(SPPP_WLOCKED(sp)); 4640 4641 if (debug) 4642 log(LOG_DEBUG, "%s: chap tld\n", ifp->if_xname); 4643 callout_stop(&sp->ch[IDX_CHAP]); 4644 sp->lcp.protos &= ~(1 << IDX_CHAP); 4645 4646 lcp.Close(sp); 4647 } 4648 4649 static void 4650 sppp_chap_scr(struct sppp *sp) 4651 { 4652 uint32_t *ch; 4653 u_char clen = 4 * sizeof(uint32_t); 4654 4655 KASSERT(SPPP_WLOCKED(sp)); 4656 4657 if (sp->hisauth.name == NULL) { 4658 /* can't do anything useful */ 4659 printf("%s: chap starting without his name being set\n", 4660 sp->pp_if.if_xname); 4661 return; 4662 } 4663 4664 /* Compute random challenge. */ 4665 ch = (uint32_t *)sp->hisauth.challenge; 4666 cprng_strong(kern_cprng, ch, clen, 0); 4667 4668 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4669 4670 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4671 sizeof clen, (const char *)&clen, 4672 sizeof(sp->hisauth.challenge), sp->hisauth.challenge, 4673 0); 4674 } 4675 4676 /* 4677 *--------------------------------------------------------------------------* 4678 * * 4679 * The PAP implementation. * 4680 * * 4681 *--------------------------------------------------------------------------* 4682 */ 4683 /* 4684 * For PAP, we need to keep a little state also if we are the peer, not the 4685 * authenticator. This is since we don't get a request to authenticate, but 4686 * have to repeatedly authenticate ourself until we got a response (or the 4687 * retry counter is expired). 4688 */ 4689 4690 /* 4691 * Handle incoming PAP packets. */ 4692 static void 4693 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4694 { 4695 STDDCL; 4696 struct lcp_header *h; 4697 int len, x; 4698 u_char mlen; 4699 char *name, *secret; 4700 int name_len, secret_len; 4701 4702 /* 4703 * Malicious input might leave this uninitialized, so 4704 * init to an impossible value. 4705 */ 4706 secret_len = -1; 4707 4708 len = m->m_pkthdr.len; 4709 if (len < 5) { 4710 if (debug) 4711 log(LOG_DEBUG, 4712 "%s: pap invalid packet length: %d bytes\n", 4713 ifp->if_xname, len); 4714 return; 4715 } 4716 h = mtod(m, struct lcp_header *); 4717 if (len > ntohs(h->len)) 4718 len = ntohs(h->len); 4719 4720 SPPP_LOCK(sp, RW_WRITER); 4721 4722 switch (h->type) { 4723 /* PAP request is my authproto */ 4724 case PAP_REQ: 4725 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4726 /* can't do anything useful */ 4727 printf("%s: " 4728 "pap request without his name and his secret being set\n", 4729 ifp->if_xname); 4730 break; 4731 } 4732 name = 1 + (u_char *)(h + 1); 4733 name_len = name[-1]; 4734 secret = name + name_len + 1; 4735 if (name_len > len - 6 || 4736 (secret_len = secret[-1]) > len - 6 - name_len) { 4737 if (debug) { 4738 log(LOG_DEBUG, "%s: pap corrupted input " 4739 "<%s id=0x%x len=%d", 4740 ifp->if_xname, 4741 sppp_auth_type_name(PPP_PAP, h->type), 4742 h->ident, ntohs(h->len)); 4743 if (len > 4) 4744 sppp_print_bytes((u_char *)(h + 1), 4745 len - 4); 4746 addlog(">\n"); 4747 } 4748 break; 4749 } 4750 if (debug) { 4751 log(LOG_DEBUG, "%s: pap input(%s) " 4752 "<%s id=0x%x len=%d name=", 4753 ifp->if_xname, 4754 sppp_state_name(sp->state[IDX_PAP]), 4755 sppp_auth_type_name(PPP_PAP, h->type), 4756 h->ident, ntohs(h->len)); 4757 sppp_print_string((char *)name, name_len); 4758 addlog(" secret="); 4759 sppp_print_string((char *)secret, secret_len); 4760 addlog(">\n"); 4761 } 4762 if (name_len != sp->hisauth.name_len || 4763 secret_len != sp->hisauth.secret_len || 4764 memcmp(name, sp->hisauth.name, name_len) != 0 || 4765 memcmp(secret, sp->hisauth.secret, secret_len) != 0) { 4766 /* action scn, tld */ 4767 sp->pp_auth_failures++; 4768 mlen = sizeof(FAILMSG) - 1; 4769 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4770 sizeof mlen, (const char *)&mlen, 4771 sizeof(FAILMSG) - 1, (const u_char *)FAILMSG, 4772 0); 4773 pap.tld(sp); 4774 break; 4775 } 4776 /* action sca, perhaps tlu */ 4777 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4778 sp->state[IDX_PAP] == STATE_OPENED) { 4779 mlen = sizeof(SUCCMSG) - 1; 4780 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4781 sizeof mlen, (const char *)&mlen, 4782 sizeof(SUCCMSG) - 1, (const u_char *)SUCCMSG, 4783 0); 4784 } 4785 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4786 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4787 pap.tlu(sp); 4788 } 4789 break; 4790 4791 /* ack and nak are his authproto */ 4792 case PAP_ACK: 4793 callout_stop(&sp->pap_my_to_ch); 4794 if (debug) { 4795 log(LOG_DEBUG, "%s: pap success", 4796 ifp->if_xname); 4797 name = 1 + (u_char *)(h + 1); 4798 name_len = name[-1]; 4799 if (len > 5 && name_len < len+4) { 4800 addlog(": "); 4801 sppp_print_string(name, name_len); 4802 } 4803 addlog("\n"); 4804 } 4805 x = splnet(); 4806 sp->pp_auth_failures = 0; 4807 sp->pp_flags &= ~PP_NEEDAUTH; 4808 if (sp->myauth.proto == PPP_PAP && 4809 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4810 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4811 /* 4812 * We are authenticator for PAP but didn't 4813 * complete yet. Leave it to tlu to proceed 4814 * to network phase. 4815 */ 4816 splx(x); 4817 break; 4818 } 4819 splx(x); 4820 sppp_phase_network(sp); 4821 break; 4822 4823 case PAP_NAK: 4824 callout_stop(&sp->pap_my_to_ch); 4825 sp->pp_auth_failures++; 4826 if (debug) { 4827 log(LOG_INFO, "%s: pap failure", 4828 ifp->if_xname); 4829 name = 1 + (u_char *)(h + 1); 4830 name_len = name[-1]; 4831 if (len > 5 && name_len < len+4) { 4832 addlog(": "); 4833 sppp_print_string(name, name_len); 4834 } 4835 addlog("\n"); 4836 } else 4837 log(LOG_INFO, "%s: pap failure\n", 4838 ifp->if_xname); 4839 /* await LCP shutdown by authenticator */ 4840 break; 4841 4842 default: 4843 /* Unknown PAP packet type -- ignore. */ 4844 if (debug) { 4845 log(LOG_DEBUG, "%s: pap corrupted input " 4846 "<0x%x id=0x%x len=%d", 4847 ifp->if_xname, 4848 h->type, h->ident, ntohs(h->len)); 4849 if (len > 4) 4850 sppp_print_bytes((u_char *)(h + 1), len - 4); 4851 addlog(">\n"); 4852 } 4853 break; 4854 } 4855 4856 SPPP_UNLOCK(sp); 4857 } 4858 4859 static void 4860 sppp_pap_init(struct sppp *sp) 4861 { 4862 4863 KASSERT(SPPP_WLOCKED(sp)); 4864 4865 /* PAP doesn't have STATE_INITIAL at all. */ 4866 sp->state[IDX_PAP] = STATE_CLOSED; 4867 sp->fail_counter[IDX_PAP] = 0; 4868 sp->pp_seq[IDX_PAP] = 0; 4869 sp->pp_rseq[IDX_PAP] = 0; 4870 callout_init(&sp->ch[IDX_PAP], CALLOUT_MPSAFE); 4871 callout_init(&sp->pap_my_to_ch, CALLOUT_MPSAFE); 4872 } 4873 4874 static void 4875 sppp_pap_open(struct sppp *sp) 4876 { 4877 4878 KASSERT(SPPP_WLOCKED(sp)); 4879 4880 if (sp->hisauth.proto == PPP_PAP && 4881 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4882 /* we are authenticator for PAP, start our timer */ 4883 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4884 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4885 } 4886 if (sp->myauth.proto == PPP_PAP) { 4887 /* we are peer, send a request, and start a timer */ 4888 pap.scr(sp); 4889 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4890 sppp_pap_my_TO, sp); 4891 } 4892 } 4893 4894 static void 4895 sppp_pap_close(struct sppp *sp) 4896 { 4897 4898 KASSERT(SPPP_WLOCKED(sp)); 4899 4900 if (sp->state[IDX_PAP] != STATE_CLOSED) 4901 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4902 } 4903 4904 /* 4905 * That's the timeout routine if we are authenticator. Since the 4906 * authenticator is basically passive in PAP, we can't do much here. 4907 */ 4908 static void 4909 sppp_pap_TO(void *cookie) 4910 { 4911 struct sppp *sp = (struct sppp *)cookie; 4912 STDDCL; 4913 int s; 4914 4915 s = splnet(); 4916 SPPP_LOCK(sp, RW_WRITER); 4917 4918 if (debug) 4919 log(LOG_DEBUG, "%s: pap TO(%s) rst_counter = %d\n", 4920 ifp->if_xname, 4921 sppp_state_name(sp->state[IDX_PAP]), 4922 sp->rst_counter[IDX_PAP]); 4923 4924 if (--sp->rst_counter[IDX_PAP] < 0) 4925 /* TO- event */ 4926 switch (sp->state[IDX_PAP]) { 4927 case STATE_REQ_SENT: 4928 pap.tld(sp); 4929 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4930 break; 4931 } 4932 else 4933 /* TO+ event, not very much we could do */ 4934 switch (sp->state[IDX_PAP]) { 4935 case STATE_REQ_SENT: 4936 /* sppp_cp_change_state() will restart the timer */ 4937 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4938 break; 4939 } 4940 4941 SPPP_UNLOCK(sp); 4942 splx(s); 4943 } 4944 4945 /* 4946 * That's the timeout handler if we are peer. Since the peer is active, 4947 * we need to retransmit our PAP request since it is apparently lost. 4948 * XXX We should impose a max counter. 4949 */ 4950 static void 4951 sppp_pap_my_TO(void *cookie) 4952 { 4953 struct sppp *sp = (struct sppp *)cookie; 4954 STDDCL; 4955 4956 SPPP_LOCK(sp, RW_WRITER); 4957 if (debug) 4958 log(LOG_DEBUG, "%s: pap peer TO\n", 4959 ifp->if_xname); 4960 4961 pap.scr(sp); 4962 4963 SPPP_UNLOCK(sp); 4964 } 4965 4966 static void 4967 sppp_pap_tlu(struct sppp *sp) 4968 { 4969 STDDCL; 4970 int x; 4971 4972 KASSERT(SPPP_WLOCKED(sp)); 4973 4974 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4975 4976 if (debug) 4977 log(LOG_DEBUG, "%s: %s tlu\n", 4978 ifp->if_xname, pap.name); 4979 4980 x = splnet(); 4981 sp->pp_auth_failures = 0; 4982 /* indicate to LCP that we need to be closed down */ 4983 sp->lcp.protos |= (1 << IDX_PAP); 4984 4985 if (sp->pp_flags & PP_NEEDAUTH) { 4986 /* 4987 * Remote is authenticator, but his auth proto didn't 4988 * complete yet. Defer the transition to network 4989 * phase. 4990 */ 4991 splx(x); 4992 return; 4993 } 4994 splx(x); 4995 sppp_phase_network(sp); 4996 } 4997 4998 static void 4999 sppp_pap_tld(struct sppp *sp) 5000 { 5001 STDDCL; 5002 5003 KASSERT(SPPP_WLOCKED(sp)); 5004 5005 if (debug) 5006 log(LOG_DEBUG, "%s: pap tld\n", ifp->if_xname); 5007 callout_stop(&sp->ch[IDX_PAP]); 5008 callout_stop(&sp->pap_my_to_ch); 5009 sp->lcp.protos &= ~(1 << IDX_PAP); 5010 5011 lcp.Close(sp); 5012 } 5013 5014 static void 5015 sppp_pap_scr(struct sppp *sp) 5016 { 5017 u_char idlen, pwdlen; 5018 5019 KASSERT(SPPP_WLOCKED(sp)); 5020 5021 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 5022 /* can't do anything useful */ 5023 printf("%s: pap starting without my name and secret being set\n", 5024 sp->pp_if.if_xname); 5025 return; 5026 } 5027 5028 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 5029 pwdlen = sp->myauth.secret_len; 5030 idlen = sp->myauth.name_len; 5031 5032 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 5033 sizeof idlen, (const char *)&idlen, 5034 idlen, sp->myauth.name, 5035 sizeof pwdlen, (const char *)&pwdlen, 5036 pwdlen, sp->myauth.secret, 5037 0); 5038 } 5039 5040 /* 5041 * Random miscellaneous functions. 5042 */ 5043 5044 /* 5045 * Send a PAP or CHAP proto packet. 5046 * 5047 * Varadic function, each of the elements for the ellipsis is of type 5048 * ``size_t mlen, const u_char *msg''. Processing will stop iff 5049 * mlen == 0. 5050 * NOTE: never declare variadic functions with types subject to type 5051 * promotion (i.e. u_char). This is asking for big trouble depending 5052 * on the architecture you are on... 5053 */ 5054 5055 static void 5056 sppp_auth_send(const struct cp *cp, struct sppp *sp, 5057 unsigned int type, unsigned int id, 5058 ...) 5059 { 5060 STDDCL; 5061 struct lcp_header *lh; 5062 struct mbuf *m; 5063 u_char *p; 5064 int len; 5065 size_t pkthdrlen; 5066 unsigned int mlen; 5067 const char *msg; 5068 va_list ap; 5069 5070 KASSERT(SPPP_WLOCKED(sp)); 5071 5072 MGETHDR(m, M_DONTWAIT, MT_DATA); 5073 if (! m) 5074 return; 5075 m_reset_rcvif(m); 5076 5077 if (sp->pp_flags & PP_NOFRAMING) { 5078 *mtod(m, uint16_t *) = htons(cp->proto); 5079 pkthdrlen = 2; 5080 lh = (struct lcp_header *)(mtod(m, uint8_t *)+2); 5081 } else { 5082 struct ppp_header *h; 5083 h = mtod(m, struct ppp_header *); 5084 h->address = PPP_ALLSTATIONS; /* broadcast address */ 5085 h->control = PPP_UI; /* Unnumbered Info */ 5086 h->protocol = htons(cp->proto); 5087 pkthdrlen = PPP_HEADER_LEN; 5088 5089 lh = (struct lcp_header *)(h + 1); 5090 } 5091 5092 lh->type = type; 5093 lh->ident = id; 5094 p = (u_char *)(lh + 1); 5095 5096 va_start(ap, id); 5097 len = 0; 5098 5099 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 5100 msg = va_arg(ap, const char *); 5101 len += mlen; 5102 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 5103 va_end(ap); 5104 m_freem(m); 5105 return; 5106 } 5107 5108 memcpy(p, msg, mlen); 5109 p += mlen; 5110 } 5111 va_end(ap); 5112 5113 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 5114 lh->len = htons(LCP_HEADER_LEN + len); 5115 5116 if (debug) { 5117 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 5118 ifp->if_xname, cp->name, 5119 sppp_auth_type_name(cp->proto, lh->type), 5120 lh->ident, ntohs(lh->len)); 5121 if (len) 5122 sppp_print_bytes((u_char *)(lh + 1), len); 5123 addlog(">\n"); 5124 } 5125 if (IF_QFULL(&sp->pp_cpq)) { 5126 IF_DROP(&sp->pp_fastq); 5127 IF_DROP(&ifp->if_snd); 5128 m_freem(m); 5129 if_statinc(ifp, if_oerrors); 5130 return; 5131 } 5132 5133 if_statadd(ifp, if_obytes, m->m_pkthdr.len + sp->pp_framebytes); 5134 IF_ENQUEUE(&sp->pp_cpq, m); 5135 5136 if (! (ifp->if_flags & IFF_OACTIVE)) { 5137 SPPP_UNLOCK(sp); 5138 if_start_lock(ifp); 5139 SPPP_LOCK(sp, RW_WRITER); 5140 } 5141 } 5142 5143 /* 5144 * Send keepalive packets, every 10 seconds. 5145 */ 5146 static void 5147 sppp_keepalive(void *dummy) 5148 { 5149 struct sppp *sp; 5150 int s; 5151 time_t now; 5152 5153 SPPPQ_LOCK(); 5154 5155 s = splnet(); 5156 now = time_uptime; 5157 for (sp=spppq; sp; sp=sp->pp_next) { 5158 struct ifnet *ifp = NULL; 5159 5160 SPPP_LOCK(sp, RW_WRITER); 5161 ifp = &sp->pp_if; 5162 5163 /* check idle timeout */ 5164 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 5165 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 5166 /* idle timeout is enabled for this interface */ 5167 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 5168 if (ifp->if_flags & IFF_DEBUG) 5169 printf("%s: no activity for %lu seconds\n", 5170 sp->pp_if.if_xname, 5171 (unsigned long)(now-sp->pp_last_activity)); 5172 lcp.Close(sp); 5173 SPPP_UNLOCK(sp); 5174 continue; 5175 } 5176 } 5177 5178 /* Keepalive mode disabled or channel down? */ 5179 if (! (sp->pp_flags & PP_KEEPALIVE) || 5180 ! (ifp->if_flags & IFF_RUNNING)) { 5181 SPPP_UNLOCK(sp); 5182 continue; 5183 } 5184 5185 5186 /* No keepalive in PPP mode if LCP not opened yet. */ 5187 if (! (sp->pp_flags & PP_CISCO) && 5188 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 5189 SPPP_UNLOCK(sp); 5190 continue; 5191 } 5192 5193 /* No echo reply, but maybe user data passed through? */ 5194 if ((now - sp->pp_last_receive) < sp->pp_max_noreceive) { 5195 sp->pp_alivecnt = 0; 5196 SPPP_UNLOCK(sp); 5197 continue; 5198 } 5199 5200 if (sp->pp_alivecnt >= sp->pp_maxalive) { 5201 /* No keepalive packets got. Stop the interface. */ 5202 SPPP_UNLOCK(sp); 5203 if_down (ifp); 5204 SPPP_LOCK(sp, RW_WRITER); 5205 5206 IF_PURGE(&sp->pp_cpq); 5207 5208 if (! (sp->pp_flags & PP_CISCO)) { 5209 printf("%s: LCP keepalive timed out, going to restart the connection\n", 5210 ifp->if_xname); 5211 sp->pp_alivecnt = 0; 5212 5213 /* we are down, close all open protocols */ 5214 lcp.Close(sp); 5215 5216 /* And now prepare LCP to reestablish the link, if configured to do so. */ 5217 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 5218 5219 /* Close connection immediately, completition of this 5220 * will summon the magic needed to reestablish it. */ 5221 sppp_notify_tlf_wlocked(sp); 5222 5223 SPPP_UNLOCK(sp); 5224 continue; 5225 } 5226 } 5227 if (sp->pp_alivecnt < sp->pp_maxalive) 5228 ++sp->pp_alivecnt; 5229 if (sp->pp_flags & PP_CISCO) 5230 sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ, 5231 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 5232 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 5233 int32_t nmagic = htonl(sp->lcp.magic); 5234 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 5235 sppp_cp_send(sp, PPP_LCP, ECHO_REQ, 5236 sp->lcp.echoid, 4, &nmagic); 5237 } 5238 5239 SPPP_UNLOCK(sp); 5240 } 5241 splx(s); 5242 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 5243 5244 SPPPQ_UNLOCK(); 5245 } 5246 5247 #ifdef INET 5248 /* 5249 * Get both IP addresses. 5250 */ 5251 static void 5252 sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, uint32_t *srcmask) 5253 { 5254 struct ifnet *ifp = &sp->pp_if; 5255 struct ifaddr *ifa; 5256 struct sockaddr_in *si, *sm; 5257 uint32_t ssrc, ddst; 5258 int s; 5259 struct psref psref; 5260 5261 sm = NULL; 5262 ssrc = ddst = 0; 5263 /* 5264 * Pick the first AF_INET address from the list, 5265 * aliases don't make any sense on a p2p link anyway. 5266 */ 5267 si = 0; 5268 s = pserialize_read_enter(); 5269 IFADDR_READER_FOREACH(ifa, ifp) { 5270 if (ifa->ifa_addr->sa_family == AF_INET) { 5271 si = (struct sockaddr_in *)ifa->ifa_addr; 5272 sm = (struct sockaddr_in *)ifa->ifa_netmask; 5273 if (si) { 5274 ifa_acquire(ifa, &psref); 5275 break; 5276 } 5277 } 5278 } 5279 pserialize_read_exit(s); 5280 if (ifa) { 5281 if (si && si->sin_addr.s_addr) { 5282 ssrc = si->sin_addr.s_addr; 5283 if (srcmask) 5284 *srcmask = ntohl(sm->sin_addr.s_addr); 5285 } 5286 5287 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 5288 if (si && si->sin_addr.s_addr) 5289 ddst = si->sin_addr.s_addr; 5290 ifa_release(ifa, &psref); 5291 } 5292 5293 if (dst) *dst = ntohl(ddst); 5294 if (src) *src = ntohl(ssrc); 5295 } 5296 5297 /* 5298 * Set IP addresses. Must be called at splnet. 5299 * If an address is 0, leave it the way it is. 5300 */ 5301 static void 5302 sppp_set_ip_addrs_work(struct work *wk, struct sppp *sp) 5303 { 5304 STDDCL; 5305 struct ifaddr *ifa; 5306 struct sockaddr_in *si, *dest; 5307 uint32_t myaddr = 0, hisaddr = 0; 5308 int s; 5309 5310 IFNET_LOCK(ifp); 5311 5312 /* 5313 * Pick the first AF_INET address from the list, 5314 * aliases don't make any sense on a p2p link anyway. 5315 */ 5316 si = dest = NULL; 5317 s = pserialize_read_enter(); 5318 IFADDR_READER_FOREACH(ifa, ifp) { 5319 if (ifa->ifa_addr->sa_family == AF_INET) { 5320 si = (struct sockaddr_in *)ifa->ifa_addr; 5321 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5322 break; 5323 } 5324 } 5325 pserialize_read_exit(s); 5326 5327 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 5328 myaddr = sp->ipcp.req_myaddr; 5329 else if (si != NULL) 5330 myaddr = ntohl(si->sin_addr.s_addr); 5331 5332 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 5333 hisaddr = sp->ipcp.req_hisaddr; 5334 else if (dest != NULL) 5335 hisaddr = ntohl(dest->sin_addr.s_addr); 5336 5337 if (si != NULL && dest != NULL) { 5338 int error; 5339 struct sockaddr_in new_sin = *si; 5340 struct sockaddr_in new_dst = *dest; 5341 5342 if (myaddr != 0) 5343 new_sin.sin_addr.s_addr = htonl(myaddr); 5344 if (hisaddr != 0) { 5345 new_dst.sin_addr.s_addr = htonl(hisaddr); 5346 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) 5347 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 5348 } 5349 5350 in_addrhash_remove(ifatoia(ifa)); 5351 5352 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5353 5354 in_addrhash_insert(ifatoia(ifa)); 5355 5356 if (debug && error) 5357 { 5358 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5359 ifp->if_xname, __func__, error); 5360 } 5361 if (!error) { 5362 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5363 } 5364 } 5365 5366 if (ifp->if_mtu > sp->lcp.their_mru) { 5367 sp->pp_saved_mtu = ifp->if_mtu; 5368 ifp->if_mtu = sp->lcp.their_mru; 5369 if (debug) 5370 log(LOG_DEBUG, 5371 "%s: setting MTU to %" PRIu64 " bytes\n", 5372 ifp->if_xname, ifp->if_mtu); 5373 } 5374 5375 IFNET_UNLOCK(ifp); 5376 5377 sppp_notify_con(sp); 5378 } 5379 5380 static void 5381 sppp_set_ip_addrs(struct sppp *sp) 5382 { 5383 struct ifnet *ifp = &sp->pp_if; 5384 5385 if (!pcq_put(sp->ipcp.update_addrs_q, (void *)IPCP_SET_ADDRS)) { 5386 log(LOG_WARNING, "%s: cannot enqueued, ignore sppp_clear_ip_addrs\n", 5387 ifp->if_xname); 5388 return; 5389 } 5390 5391 if (atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1) == 1) 5392 return; 5393 5394 workqueue_enqueue(sp->ipcp.update_addrs_wq, &sp->ipcp.update_addrs_wk, NULL); 5395 } 5396 5397 /* 5398 * Clear IP addresses. Must be called at splnet. 5399 */ 5400 static void 5401 sppp_clear_ip_addrs_work(struct work *wk, struct sppp *sp) 5402 { 5403 STDDCL; 5404 struct ifaddr *ifa; 5405 struct sockaddr_in *si, *dest; 5406 int s; 5407 5408 IFNET_LOCK(ifp); 5409 5410 /* 5411 * Pick the first AF_INET address from the list, 5412 * aliases don't make any sense on a p2p link anyway. 5413 */ 5414 si = dest = NULL; 5415 s = pserialize_read_enter(); 5416 IFADDR_READER_FOREACH(ifa, ifp) { 5417 if (ifa->ifa_addr->sa_family == AF_INET) { 5418 si = (struct sockaddr_in *)ifa->ifa_addr; 5419 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5420 break; 5421 } 5422 } 5423 pserialize_read_exit(s); 5424 5425 if (si != NULL) { 5426 struct sockaddr_in new_sin = *si; 5427 struct sockaddr_in new_dst = *dest; 5428 int error; 5429 5430 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 5431 new_sin.sin_addr.s_addr = 0; 5432 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 5433 new_dst.sin_addr.s_addr = sp->ipcp.saved_hisaddr; 5434 5435 in_addrhash_remove(ifatoia(ifa)); 5436 5437 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5438 5439 in_addrhash_insert(ifatoia(ifa)); 5440 5441 if (debug && error) 5442 { 5443 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5444 ifp->if_xname, __func__, error); 5445 } 5446 if (!error) { 5447 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5448 } 5449 } 5450 5451 if (sp->pp_saved_mtu > 0) { 5452 ifp->if_mtu = sp->pp_saved_mtu; 5453 sp->pp_saved_mtu = 0; 5454 if (debug) 5455 log(LOG_DEBUG, 5456 "%s: resetting MTU to %" PRIu64 " bytes\n", 5457 ifp->if_xname, ifp->if_mtu); 5458 } 5459 5460 IFNET_UNLOCK(ifp); 5461 } 5462 5463 static void 5464 sppp_clear_ip_addrs(struct sppp *sp) 5465 { 5466 struct ifnet *ifp = &sp->pp_if; 5467 5468 if (!pcq_put(sp->ipcp.update_addrs_q, (void *)IPCP_CLEAR_ADDRS)) { 5469 log(LOG_WARNING, "%s: cannot enqueued, ignore sppp_clear_ip_addrs\n", 5470 ifp->if_xname); 5471 return; 5472 } 5473 5474 if (atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1) == 1) 5475 return; 5476 5477 workqueue_enqueue(sp->ipcp.update_addrs_wq, &sp->ipcp.update_addrs_wk, NULL); 5478 } 5479 5480 static void 5481 sppp_update_ip_addrs_work(struct work *wk, void *arg) 5482 { 5483 struct sppp *sp = arg; 5484 void *work; 5485 5486 atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 0); 5487 5488 while ((work = pcq_get(sp->ipcp.update_addrs_q)) != NULL) { 5489 int update = (intptr_t)work; 5490 5491 if (update == IPCP_SET_ADDRS) 5492 sppp_set_ip_addrs_work(wk, sp); 5493 else if (update == IPCP_CLEAR_ADDRS) 5494 sppp_clear_ip_addrs_work(wk, sp); 5495 } 5496 } 5497 #endif 5498 5499 #ifdef INET6 5500 /* 5501 * Get both IPv6 addresses. 5502 */ 5503 static void 5504 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 5505 struct in6_addr *srcmask) 5506 { 5507 struct ifnet *ifp = &sp->pp_if; 5508 struct ifaddr *ifa; 5509 struct sockaddr_in6 *si, *sm; 5510 struct in6_addr ssrc, ddst; 5511 int s; 5512 struct psref psref; 5513 5514 sm = NULL; 5515 memset(&ssrc, 0, sizeof(ssrc)); 5516 memset(&ddst, 0, sizeof(ddst)); 5517 /* 5518 * Pick the first link-local AF_INET6 address from the list, 5519 * aliases don't make any sense on a p2p link anyway. 5520 */ 5521 si = 0; 5522 s = pserialize_read_enter(); 5523 IFADDR_READER_FOREACH(ifa, ifp) { 5524 if (ifa->ifa_addr->sa_family == AF_INET6) { 5525 si = (struct sockaddr_in6 *)ifa->ifa_addr; 5526 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 5527 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) { 5528 ifa_acquire(ifa, &psref); 5529 break; 5530 } 5531 } 5532 } 5533 pserialize_read_exit(s); 5534 5535 if (ifa) { 5536 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 5537 memcpy(&ssrc, &si->sin6_addr, sizeof(ssrc)); 5538 if (srcmask) { 5539 memcpy(srcmask, &sm->sin6_addr, 5540 sizeof(*srcmask)); 5541 } 5542 } 5543 5544 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 5545 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 5546 memcpy(&ddst, &si->sin6_addr, sizeof(ddst)); 5547 ifa_release(ifa, &psref); 5548 } 5549 5550 if (dst) 5551 memcpy(dst, &ddst, sizeof(*dst)); 5552 if (src) 5553 memcpy(src, &ssrc, sizeof(*src)); 5554 } 5555 5556 #ifdef IPV6CP_MYIFID_DYN 5557 /* 5558 * Generate random ifid. 5559 */ 5560 static void 5561 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 5562 { 5563 /* TBD */ 5564 } 5565 5566 /* 5567 * Set my IPv6 address. Must be called at splnet. 5568 */ 5569 static void 5570 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 5571 { 5572 STDDCL; 5573 struct ifaddr *ifa; 5574 struct sockaddr_in6 *sin6; 5575 int s; 5576 struct psref psref; 5577 5578 IFNET_LOCK(ifp); 5579 5580 /* 5581 * Pick the first link-local AF_INET6 address from the list, 5582 * aliases don't make any sense on a p2p link anyway. 5583 */ 5584 5585 sin6 = NULL; 5586 s = pserialize_read_enter(); 5587 IFADDR_READER_FOREACH(ifa, ifp) 5588 { 5589 if (ifa->ifa_addr->sa_family == AF_INET6) 5590 { 5591 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 5592 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 5593 ifa_acquire(ifa, &psref); 5594 break; 5595 } 5596 } 5597 } 5598 pserialize_read_exit(s); 5599 5600 if (ifa && sin6) 5601 { 5602 int error; 5603 struct sockaddr_in6 new_sin6 = *sin6; 5604 5605 memcpy(&new_sin6.sin6_addr, src, sizeof(new_sin6.sin6_addr)); 5606 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 5607 if (debug && error) 5608 { 5609 log(LOG_DEBUG, "%s: %s: in6_ifinit failed, error=%d\n", 5610 ifp->if_xname, __func__, error); 5611 } 5612 if (!error) { 5613 pfil_run_addrhooks(if_pfil, SIOCAIFADDR_IN6, ifa); 5614 } 5615 ifa_release(ifa, &psref); 5616 } 5617 5618 IFNET_UNLOCK(ifp); 5619 } 5620 #endif 5621 5622 /* 5623 * Suggest a candidate address to be used by peer. 5624 */ 5625 static void 5626 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 5627 { 5628 struct in6_addr myaddr; 5629 struct timeval tv; 5630 5631 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 5632 5633 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 5634 microtime(&tv); 5635 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 5636 myaddr.s6_addr[14] ^= 0xff; 5637 myaddr.s6_addr[15] ^= 0xff; 5638 } else { 5639 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 5640 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 5641 } 5642 if (suggest) 5643 memcpy(suggest, &myaddr, sizeof(myaddr)); 5644 } 5645 #endif /*INET6*/ 5646 5647 /* 5648 * Process ioctl requests specific to the PPP interface. 5649 * Permissions have already been checked. 5650 */ 5651 static int 5652 sppp_params(struct sppp *sp, u_long cmd, void *data) 5653 { 5654 switch (cmd) { 5655 case SPPPGETAUTHCFG: 5656 { 5657 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5658 int error; 5659 size_t len; 5660 5661 SPPP_LOCK(sp, RW_READER); 5662 5663 cfg->myauthflags = sp->myauth.flags; 5664 cfg->hisauthflags = sp->hisauth.flags; 5665 strlcpy(cfg->ifname, sp->pp_if.if_xname, sizeof(cfg->ifname)); 5666 cfg->hisauth = 0; 5667 if (sp->hisauth.proto) 5668 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5669 cfg->myauth = 0; 5670 if (sp->myauth.proto) 5671 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5672 if (cfg->myname_length == 0) { 5673 if (sp->myauth.name != NULL) 5674 cfg->myname_length = sp->myauth.name_len + 1; 5675 } else { 5676 if (sp->myauth.name == NULL) { 5677 cfg->myname_length = 0; 5678 } else { 5679 len = sp->myauth.name_len + 1; 5680 5681 5682 if (cfg->myname_length < len) { 5683 SPPP_UNLOCK(sp); 5684 return (ENAMETOOLONG); 5685 } 5686 error = copyout(sp->myauth.name, cfg->myname, len); 5687 if (error) { 5688 SPPP_UNLOCK(sp); 5689 return error; 5690 } 5691 } 5692 } 5693 if (cfg->hisname_length == 0) { 5694 if (sp->hisauth.name != NULL) 5695 cfg->hisname_length = sp->hisauth.name_len + 1; 5696 } else { 5697 if (sp->hisauth.name == NULL) { 5698 cfg->hisname_length = 0; 5699 } else { 5700 len = sp->hisauth.name_len + 1; 5701 5702 if (cfg->hisname_length < len) { 5703 SPPP_UNLOCK(sp); 5704 return (ENAMETOOLONG); 5705 } 5706 error = copyout(sp->hisauth.name, cfg->hisname, len); 5707 if (error) { 5708 SPPP_UNLOCK(sp); 5709 return error; 5710 } 5711 } 5712 } 5713 SPPP_UNLOCK(sp); 5714 } 5715 break; 5716 case SPPPSETAUTHCFG: 5717 { 5718 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5719 int error; 5720 5721 SPPP_LOCK(sp, RW_WRITER); 5722 5723 if (sp->myauth.name) { 5724 free(sp->myauth.name, M_DEVBUF); 5725 sp->myauth.name = NULL; 5726 } 5727 if (sp->myauth.secret) { 5728 free(sp->myauth.secret, M_DEVBUF); 5729 sp->myauth.secret = NULL; 5730 } 5731 if (sp->hisauth.name) { 5732 free(sp->hisauth.name, M_DEVBUF); 5733 sp->hisauth.name = NULL; 5734 } 5735 if (sp->hisauth.secret) { 5736 free(sp->hisauth.secret, M_DEVBUF); 5737 sp->hisauth.secret = NULL; 5738 } 5739 5740 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5741 if (cfg->hisname_length >= MCLBYTES) { 5742 SPPP_UNLOCK(sp); 5743 return (ENAMETOOLONG); 5744 } 5745 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5746 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5747 if (error) { 5748 free(sp->hisauth.name, M_DEVBUF); 5749 sp->hisauth.name = NULL; 5750 SPPP_UNLOCK(sp); 5751 return error; 5752 } 5753 sp->hisauth.name_len = cfg->hisname_length - 1; 5754 sp->hisauth.name[sp->hisauth.name_len] = 0; 5755 } 5756 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5757 if (cfg->hissecret_length >= MCLBYTES) { 5758 SPPP_UNLOCK(sp); 5759 return (ENAMETOOLONG); 5760 } 5761 sp->hisauth.secret = malloc(cfg->hissecret_length, 5762 M_DEVBUF, M_WAITOK); 5763 error = copyin(cfg->hissecret, sp->hisauth.secret, 5764 cfg->hissecret_length); 5765 if (error) { 5766 free(sp->hisauth.secret, M_DEVBUF); 5767 sp->hisauth.secret = NULL; 5768 SPPP_UNLOCK(sp); 5769 return error; 5770 } 5771 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5772 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5773 } 5774 if (cfg->myname != NULL && cfg->myname_length > 0) { 5775 if (cfg->myname_length >= MCLBYTES) { 5776 SPPP_UNLOCK(sp); 5777 return (ENAMETOOLONG); 5778 } 5779 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5780 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5781 if (error) { 5782 free(sp->myauth.name, M_DEVBUF); 5783 sp->myauth.name = NULL; 5784 SPPP_UNLOCK(sp); 5785 return error; 5786 } 5787 sp->myauth.name_len = cfg->myname_length - 1; 5788 sp->myauth.name[sp->myauth.name_len] = 0; 5789 } 5790 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5791 if (cfg->mysecret_length >= MCLBYTES) { 5792 SPPP_UNLOCK(sp); 5793 return (ENAMETOOLONG); 5794 } 5795 sp->myauth.secret = malloc(cfg->mysecret_length, 5796 M_DEVBUF, M_WAITOK); 5797 error = copyin(cfg->mysecret, sp->myauth.secret, 5798 cfg->mysecret_length); 5799 if (error) { 5800 free(sp->myauth.secret, M_DEVBUF); 5801 sp->myauth.secret = NULL; 5802 SPPP_UNLOCK(sp); 5803 return error; 5804 } 5805 sp->myauth.secret_len = cfg->mysecret_length - 1; 5806 sp->myauth.secret[sp->myauth.secret_len] = 0; 5807 } 5808 sp->myauth.flags = cfg->myauthflags; 5809 if (cfg->myauth) 5810 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5811 sp->hisauth.flags = cfg->hisauthflags; 5812 if (cfg->hisauth) 5813 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5814 sp->pp_auth_failures = 0; 5815 if (sp->hisauth.proto != 0) 5816 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 5817 else 5818 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 5819 5820 SPPP_UNLOCK(sp); 5821 } 5822 break; 5823 case SPPPGETLCPCFG: 5824 { 5825 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5826 5827 SPPP_LOCK(sp, RW_READER); 5828 lcpp->lcp_timeout = sp->lcp.timeout; 5829 SPPP_UNLOCK(sp); 5830 } 5831 break; 5832 case SPPPSETLCPCFG: 5833 { 5834 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5835 5836 SPPP_LOCK(sp, RW_WRITER); 5837 sp->lcp.timeout = lcpp->lcp_timeout; 5838 SPPP_UNLOCK(sp); 5839 } 5840 break; 5841 case SPPPGETSTATUS: 5842 { 5843 struct spppstatus *status = (struct spppstatus *)data; 5844 5845 SPPP_LOCK(sp, RW_READER); 5846 status->phase = sp->pp_phase; 5847 SPPP_UNLOCK(sp); 5848 } 5849 break; 5850 case SPPPGETSTATUSNCP: 5851 { 5852 struct spppstatusncp *status = (struct spppstatusncp *)data; 5853 5854 SPPP_LOCK(sp, RW_READER); 5855 status->phase = sp->pp_phase; 5856 status->ncpup = sppp_ncp_check(sp); 5857 SPPP_UNLOCK(sp); 5858 } 5859 break; 5860 case SPPPGETIDLETO: 5861 { 5862 struct spppidletimeout *to = (struct spppidletimeout *)data; 5863 5864 SPPP_LOCK(sp, RW_READER); 5865 to->idle_seconds = sp->pp_idle_timeout; 5866 SPPP_UNLOCK(sp); 5867 } 5868 break; 5869 case SPPPSETIDLETO: 5870 { 5871 struct spppidletimeout *to = (struct spppidletimeout *)data; 5872 5873 SPPP_LOCK(sp, RW_WRITER); 5874 sp->pp_idle_timeout = to->idle_seconds; 5875 SPPP_UNLOCK(sp); 5876 } 5877 break; 5878 case SPPPSETAUTHFAILURE: 5879 { 5880 struct spppauthfailuresettings *afsettings = 5881 (struct spppauthfailuresettings *)data; 5882 5883 SPPP_LOCK(sp, RW_WRITER); 5884 sp->pp_max_auth_fail = afsettings->max_failures; 5885 sp->pp_auth_failures = 0; 5886 SPPP_UNLOCK(sp); 5887 } 5888 break; 5889 case SPPPGETAUTHFAILURES: 5890 { 5891 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5892 5893 SPPP_LOCK(sp, RW_READER); 5894 stats->auth_failures = sp->pp_auth_failures; 5895 stats->max_failures = sp->pp_max_auth_fail; 5896 SPPP_UNLOCK(sp); 5897 } 5898 break; 5899 case SPPPSETDNSOPTS: 5900 { 5901 struct spppdnssettings *req = (struct spppdnssettings *)data; 5902 5903 SPPP_LOCK(sp, RW_WRITER); 5904 sp->query_dns = req->query_dns & 3; 5905 SPPP_UNLOCK(sp); 5906 } 5907 break; 5908 case SPPPGETDNSOPTS: 5909 { 5910 struct spppdnssettings *req = (struct spppdnssettings *)data; 5911 5912 SPPP_LOCK(sp, RW_READER); 5913 req->query_dns = sp->query_dns; 5914 SPPP_UNLOCK(sp); 5915 } 5916 break; 5917 case SPPPGETDNSADDRS: 5918 { 5919 struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data; 5920 5921 SPPP_LOCK(sp, RW_READER); 5922 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5923 SPPP_UNLOCK(sp); 5924 } 5925 break; 5926 case SPPPGETKEEPALIVE: 5927 { 5928 struct spppkeepalivesettings *settings = 5929 (struct spppkeepalivesettings*)data; 5930 5931 SPPP_LOCK(sp, RW_READER); 5932 settings->maxalive = sp->pp_maxalive; 5933 settings->max_noreceive = sp->pp_max_noreceive; 5934 SPPP_UNLOCK(sp); 5935 } 5936 break; 5937 case SPPPSETKEEPALIVE: 5938 { 5939 struct spppkeepalivesettings *settings = 5940 (struct spppkeepalivesettings*)data; 5941 5942 SPPP_LOCK(sp, RW_WRITER); 5943 sp->pp_maxalive = settings->maxalive; 5944 sp->pp_max_noreceive = settings->max_noreceive; 5945 SPPP_UNLOCK(sp); 5946 } 5947 break; 5948 default: 5949 { 5950 int ret; 5951 5952 MODULE_HOOK_CALL(sppp_params_50_hook, (sp, cmd, data), 5953 enosys(), ret); 5954 if (ret != ENOSYS) 5955 return ret; 5956 return (EINVAL); 5957 } 5958 } 5959 return (0); 5960 } 5961 5962 static void 5963 sppp_phase_network(struct sppp *sp) 5964 { 5965 int i; 5966 uint32_t mask; 5967 5968 KASSERT(SPPP_WLOCKED(sp)); 5969 5970 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 5971 5972 /* Notify NCPs now. */ 5973 for (i = 0; i < IDX_COUNT; i++) 5974 if ((cps[i])->flags & CP_NCP) 5975 (cps[i])->Open(sp); 5976 5977 /* Send Up events to all NCPs. */ 5978 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5979 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) { 5980 (cps[i])->Up(sp); 5981 } 5982 5983 /* if no NCP is starting, all this was in vain, close down */ 5984 sppp_lcp_check_and_close(sp); 5985 } 5986 5987 5988 static const char * 5989 sppp_cp_type_name(u_char type) 5990 { 5991 static char buf[12]; 5992 switch (type) { 5993 case CONF_REQ: return "conf-req"; 5994 case CONF_ACK: return "conf-ack"; 5995 case CONF_NAK: return "conf-nak"; 5996 case CONF_REJ: return "conf-rej"; 5997 case TERM_REQ: return "term-req"; 5998 case TERM_ACK: return "term-ack"; 5999 case CODE_REJ: return "code-rej"; 6000 case PROTO_REJ: return "proto-rej"; 6001 case ECHO_REQ: return "echo-req"; 6002 case ECHO_REPLY: return "echo-reply"; 6003 case DISC_REQ: return "discard-req"; 6004 } 6005 snprintf(buf, sizeof(buf), "0x%x", type); 6006 return buf; 6007 } 6008 6009 static const char * 6010 sppp_auth_type_name(u_short proto, u_char type) 6011 { 6012 static char buf[32]; 6013 const char *name; 6014 6015 switch (proto) { 6016 case PPP_CHAP: 6017 switch (type) { 6018 case CHAP_CHALLENGE: return "challenge"; 6019 case CHAP_RESPONSE: return "response"; 6020 case CHAP_SUCCESS: return "success"; 6021 case CHAP_FAILURE: return "failure"; 6022 default: name = "chap"; break; 6023 } 6024 break; 6025 6026 case PPP_PAP: 6027 switch (type) { 6028 case PAP_REQ: return "req"; 6029 case PAP_ACK: return "ack"; 6030 case PAP_NAK: return "nak"; 6031 default: name = "pap"; break; 6032 } 6033 break; 6034 6035 default: 6036 name = "bad"; 6037 break; 6038 } 6039 6040 snprintf(buf, sizeof(buf), "%s(%#x) %#x", name, proto, type); 6041 return buf; 6042 } 6043 6044 static const char * 6045 sppp_lcp_opt_name(u_char opt) 6046 { 6047 static char buf[12]; 6048 switch (opt) { 6049 case LCP_OPT_MRU: return "mru"; 6050 case LCP_OPT_ASYNC_MAP: return "async-map"; 6051 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 6052 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 6053 case LCP_OPT_MAGIC: return "magic"; 6054 case LCP_OPT_PROTO_COMP: return "proto-comp"; 6055 case LCP_OPT_ADDR_COMP: return "addr-comp"; 6056 case LCP_OPT_SELF_DESC_PAD: return "sdpad"; 6057 case LCP_OPT_CALL_BACK: return "callback"; 6058 case LCP_OPT_COMPOUND_FRMS: return "cmpd-frms"; 6059 case LCP_OPT_MP_MRRU: return "mrru"; 6060 case LCP_OPT_MP_SSNHF: return "mp-ssnhf"; 6061 case LCP_OPT_MP_EID: return "mp-eid"; 6062 } 6063 snprintf(buf, sizeof(buf), "0x%x", opt); 6064 return buf; 6065 } 6066 6067 static const char * 6068 sppp_ipcp_opt_name(u_char opt) 6069 { 6070 static char buf[12]; 6071 switch (opt) { 6072 case IPCP_OPT_ADDRESSES: return "addresses"; 6073 case IPCP_OPT_COMPRESSION: return "compression"; 6074 case IPCP_OPT_ADDRESS: return "address"; 6075 } 6076 snprintf(buf, sizeof(buf), "0x%x", opt); 6077 return buf; 6078 } 6079 6080 #ifdef INET6 6081 static const char * 6082 sppp_ipv6cp_opt_name(u_char opt) 6083 { 6084 static char buf[12]; 6085 switch (opt) { 6086 case IPV6CP_OPT_IFID: return "ifid"; 6087 case IPV6CP_OPT_COMPRESSION: return "compression"; 6088 } 6089 snprintf(buf, sizeof(buf), "0x%x", opt); 6090 return buf; 6091 } 6092 #endif 6093 6094 static const char * 6095 sppp_state_name(int state) 6096 { 6097 switch (state) { 6098 case STATE_INITIAL: return "initial"; 6099 case STATE_STARTING: return "starting"; 6100 case STATE_CLOSED: return "closed"; 6101 case STATE_STOPPED: return "stopped"; 6102 case STATE_CLOSING: return "closing"; 6103 case STATE_STOPPING: return "stopping"; 6104 case STATE_REQ_SENT: return "req-sent"; 6105 case STATE_ACK_RCVD: return "ack-rcvd"; 6106 case STATE_ACK_SENT: return "ack-sent"; 6107 case STATE_OPENED: return "opened"; 6108 } 6109 return "illegal"; 6110 } 6111 6112 static const char * 6113 sppp_phase_name(int phase) 6114 { 6115 switch (phase) { 6116 case SPPP_PHASE_DEAD: return "dead"; 6117 case SPPP_PHASE_ESTABLISH: return "establish"; 6118 case SPPP_PHASE_TERMINATE: return "terminate"; 6119 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 6120 case SPPP_PHASE_NETWORK: return "network"; 6121 } 6122 return "illegal"; 6123 } 6124 6125 static const char * 6126 sppp_proto_name(u_short proto) 6127 { 6128 static char buf[12]; 6129 switch (proto) { 6130 case PPP_LCP: return "lcp"; 6131 case PPP_IPCP: return "ipcp"; 6132 case PPP_PAP: return "pap"; 6133 case PPP_CHAP: return "chap"; 6134 case PPP_IPV6CP: return "ipv6cp"; 6135 } 6136 snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto); 6137 return buf; 6138 } 6139 6140 static void 6141 sppp_print_bytes(const u_char *p, u_short len) 6142 { 6143 addlog(" %02x", *p++); 6144 while (--len > 0) 6145 addlog("-%02x", *p++); 6146 } 6147 6148 static void 6149 sppp_print_string(const char *p, u_short len) 6150 { 6151 u_char c; 6152 6153 while (len-- > 0) { 6154 c = *p++; 6155 /* 6156 * Print only ASCII chars directly. RFC 1994 recommends 6157 * using only them, but we don't rely on it. */ 6158 if (c < ' ' || c > '~') 6159 addlog("\\x%x", c); 6160 else 6161 addlog("%c", c); 6162 } 6163 } 6164 6165 static const char * 6166 sppp_dotted_quad(uint32_t addr) 6167 { 6168 static char s[16]; 6169 snprintf(s, sizeof(s), "%d.%d.%d.%d", 6170 (int)((addr >> 24) & 0xff), 6171 (int)((addr >> 16) & 0xff), 6172 (int)((addr >> 8) & 0xff), 6173 (int)(addr & 0xff)); 6174 return s; 6175 } 6176 6177 /* a dummy, used to drop uninteresting events */ 6178 static void 6179 sppp_null(struct sppp *unused) 6180 { 6181 /* do just nothing */ 6182 } 6183 /* 6184 * This file is large. Tell emacs to highlight it nevertheless. 6185 * 6186 * Local Variables: 6187 * hilit-auto-highlight-maxout: 120000 6188 * End: 6189 */ 6190 6191 /* 6192 * Module glue 6193 */ 6194 MODULE(MODULE_CLASS_MISC, sppp_subr, NULL); 6195 6196 static int 6197 sppp_subr_modcmd(modcmd_t cmd, void *arg) 6198 { 6199 switch (cmd) { 6200 case MODULE_CMD_INIT: 6201 case MODULE_CMD_FINI: 6202 return 0; 6203 case MODULE_CMD_STAT: 6204 case MODULE_CMD_AUTOUNLOAD: 6205 default: 6206 return ENOTTY; 6207 } 6208 } 6209 6210 static void 6211 sppp_notify_up(struct sppp *sp) 6212 { 6213 6214 SPPP_LOCK(sp, RW_WRITER); 6215 lcp.Up(sp); 6216 SPPP_UNLOCK(sp); 6217 } 6218 6219 static void 6220 sppp_notify_down(struct sppp *sp) 6221 { 6222 6223 SPPP_LOCK(sp, RW_WRITER); 6224 lcp.Down(sp); 6225 SPPP_UNLOCK(sp); 6226 } 6227 6228 static void 6229 sppp_notify_tls_wlocked(struct sppp *sp) 6230 { 6231 6232 KASSERT(SPPP_WLOCKED(sp)); 6233 6234 if (!sp->pp_tls) 6235 return; 6236 6237 SPPP_UNLOCK(sp); 6238 sp->pp_tls(sp); 6239 SPPP_LOCK(sp, RW_WRITER); 6240 } 6241 6242 static void 6243 sppp_notify_tlf_wlocked(struct sppp *sp) 6244 { 6245 6246 KASSERT(SPPP_WLOCKED(sp)); 6247 6248 if (!sp->pp_tlf) 6249 return; 6250 6251 SPPP_UNLOCK(sp); 6252 sp->pp_tlf(sp); 6253 SPPP_LOCK(sp, RW_WRITER); 6254 } 6255 6256 static void 6257 sppp_notify_con(struct sppp *sp) 6258 { 6259 6260 if (!sp->pp_con) 6261 return; 6262 6263 sp->pp_con(sp); 6264 } 6265 6266 #ifdef INET6 6267 static void 6268 sppp_notify_con_wlocked(struct sppp *sp) 6269 { 6270 6271 KASSERT(SPPP_WLOCKED(sp)); 6272 6273 SPPP_UNLOCK(sp); 6274 sppp_notify_con(sp); 6275 SPPP_LOCK(sp, RW_WRITER); 6276 6277 } 6278 #endif 6279 6280 static void 6281 sppp_notify_chg_wlocked(struct sppp *sp) 6282 { 6283 6284 KASSERT(SPPP_WLOCKED(sp)); 6285 6286 if (!sp->pp_chg) 6287 return; 6288 6289 SPPP_UNLOCK(sp); 6290 sp->pp_chg(sp, sp->pp_phase); 6291 SPPP_LOCK(sp, RW_WRITER); 6292 } 6293