if_spppsubr.c revision 1.178
1 /* $NetBSD: if_spppsubr.c,v 1.178 2017/12/28 07:06:36 ozaki-r Exp $ */ 2 3 /* 4 * Synchronous PPP/Cisco link level subroutines. 5 * Keepalive protocol implemented in both Cisco and PPP modes. 6 * 7 * Copyright (C) 1994-1996 Cronyx Engineering Ltd. 8 * Author: Serge Vakulenko, <vak (at) cronyx.ru> 9 * 10 * Heavily revamped to conform to RFC 1661. 11 * Copyright (C) 1997, Joerg Wunsch. 12 * 13 * RFC2472 IPv6CP support. 14 * Copyright (C) 2000, Jun-ichiro itojun Hagino <itojun (at) iijlab.net>. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions are met: 18 * 1. Redistributions of source code must retain the above copyright notice, 19 * this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright notice, 21 * this list of conditions and the following disclaimer in the documentation 22 * and/or other materials provided with the distribution. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE FREEBSD PROJECT ``AS IS'' AND ANY 25 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE FREEBSD PROJECT OR CONTRIBUTORS BE 28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 34 * POSSIBILITY OF SUCH DAMAGE. 35 * 36 * From: Version 2.4, Thu Apr 30 17:17:21 MSD 1997 37 * 38 * From: if_spppsubr.c,v 1.39 1998/04/04 13:26:03 phk Exp 39 * 40 * From: Id: if_spppsubr.c,v 1.23 1999/02/23 14:47:50 hm Exp 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: if_spppsubr.c,v 1.178 2017/12/28 07:06:36 ozaki-r 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 72 #include <net/if.h> 73 #include <net/netisr.h> 74 #include <net/if_types.h> 75 #include <net/route.h> 76 #include <net/ppp_defs.h> 77 78 #include <netinet/in.h> 79 #include <netinet/in_systm.h> 80 #include <netinet/in_var.h> 81 #ifdef INET 82 #include <netinet/ip.h> 83 #include <netinet/tcp.h> 84 #endif 85 #include <net/ethertypes.h> 86 87 #ifdef INET6 88 #include <netinet6/scope6_var.h> 89 #endif 90 91 #include <net/if_sppp.h> 92 #include <net/if_spppvar.h> 93 94 #ifdef NET_MPSAFE 95 #define SPPPSUBR_MPSAFE 1 96 #endif 97 98 #define LCP_KEEPALIVE_INTERVAL 10 /* seconds between checks */ 99 #define LOOPALIVECNT 3 /* loopback detection tries */ 100 #define DEFAULT_MAXALIVECNT 3 /* max. missed alive packets */ 101 #define DEFAULT_NORECV_TIME 15 /* before we get worried */ 102 #define DEFAULT_MAX_AUTH_FAILURES 5 /* max. auth. failures */ 103 104 /* 105 * Interface flags that can be set in an ifconfig command. 106 * 107 * Setting link0 will make the link passive, i.e. it will be marked 108 * as being administrative openable, but won't be opened to begin 109 * with. Incoming calls will be answered, or subsequent calls with 110 * -link1 will cause the administrative open of the LCP layer. 111 * 112 * Setting link1 will cause the link to auto-dial only as packets 113 * arrive to be sent. 114 * 115 * Setting IFF_DEBUG will syslog the option negotiation and state 116 * transitions at level kern.debug. Note: all logs consistently look 117 * like 118 * 119 * <if-name><unit>: <proto-name> <additional info...> 120 * 121 * with <if-name><unit> being something like "bppp0", and <proto-name> 122 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc. 123 */ 124 125 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ 126 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */ 127 128 #define CONF_REQ 1 /* PPP configure request */ 129 #define CONF_ACK 2 /* PPP configure acknowledge */ 130 #define CONF_NAK 3 /* PPP configure negative ack */ 131 #define CONF_REJ 4 /* PPP configure reject */ 132 #define TERM_REQ 5 /* PPP terminate request */ 133 #define TERM_ACK 6 /* PPP terminate acknowledge */ 134 #define CODE_REJ 7 /* PPP code reject */ 135 #define PROTO_REJ 8 /* PPP protocol reject */ 136 #define ECHO_REQ 9 /* PPP echo request */ 137 #define ECHO_REPLY 10 /* PPP echo reply */ 138 #define DISC_REQ 11 /* PPP discard request */ 139 140 #define LCP_OPT_MRU 1 /* maximum receive unit */ 141 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */ 142 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ 143 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ 144 #define LCP_OPT_MAGIC 5 /* magic number */ 145 #define LCP_OPT_RESERVED 6 /* reserved */ 146 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ 147 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ 148 149 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ 150 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol */ 151 #define IPCP_OPT_ADDRESS 3 /* local IP address */ 152 #define IPCP_OPT_PRIMDNS 129 /* primary remote dns address */ 153 #define IPCP_OPT_SECDNS 131 /* secondary remote dns address */ 154 155 #define IPCP_UPDATE_LIMIT 8 /* limit of pending IP updating job */ 156 #define IPCP_SET_ADDRS 1 /* marker for IP address setting job */ 157 #define IPCP_CLEAR_ADDRS 2 /* marker for IP address clearing job */ 158 159 #define IPV6CP_OPT_IFID 1 /* interface identifier */ 160 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ 161 162 #define PAP_REQ 1 /* PAP name/password request */ 163 #define PAP_ACK 2 /* PAP acknowledge */ 164 #define PAP_NAK 3 /* PAP fail */ 165 166 #define CHAP_CHALLENGE 1 /* CHAP challenge request */ 167 #define CHAP_RESPONSE 2 /* CHAP challenge response */ 168 #define CHAP_SUCCESS 3 /* CHAP response ok */ 169 #define CHAP_FAILURE 4 /* CHAP response failed */ 170 171 #define CHAP_MD5 5 /* hash algorithm - MD5 */ 172 173 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */ 174 #define CISCO_UNICAST 0x0f /* Cisco unicast address */ 175 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ 176 #define CISCO_ADDR_REQ 0 /* Cisco address request */ 177 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */ 178 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ 179 180 /* states are named and numbered according to RFC 1661 */ 181 #define STATE_INITIAL 0 182 #define STATE_STARTING 1 183 #define STATE_CLOSED 2 184 #define STATE_STOPPED 3 185 #define STATE_CLOSING 4 186 #define STATE_STOPPING 5 187 #define STATE_REQ_SENT 6 188 #define STATE_ACK_RCVD 7 189 #define STATE_ACK_SENT 8 190 #define STATE_OPENED 9 191 192 struct ppp_header { 193 uint8_t address; 194 uint8_t control; 195 uint16_t protocol; 196 } __packed; 197 #define PPP_HEADER_LEN sizeof (struct ppp_header) 198 199 struct lcp_header { 200 uint8_t type; 201 uint8_t ident; 202 uint16_t len; 203 } __packed; 204 #define LCP_HEADER_LEN sizeof (struct lcp_header) 205 206 struct cisco_packet { 207 uint32_t type; 208 uint32_t par1; 209 uint32_t par2; 210 uint16_t rel; 211 uint16_t time0; 212 uint16_t time1; 213 } __packed; 214 #define CISCO_PACKET_LEN 18 215 216 /* 217 * We follow the spelling and capitalization of RFC 1661 here, to make 218 * it easier comparing with the standard. Please refer to this RFC in 219 * case you can't make sense out of these abbreviation; it will also 220 * explain the semantics related to the various events and actions. 221 */ 222 struct cp { 223 u_short proto; /* PPP control protocol number */ 224 u_char protoidx; /* index into state table in struct sppp */ 225 u_char flags; 226 #define CP_LCP 0x01 /* this is the LCP */ 227 #define CP_AUTH 0x02 /* this is an authentication protocol */ 228 #define CP_NCP 0x04 /* this is a NCP */ 229 #define CP_QUAL 0x08 /* this is a quality reporting protocol */ 230 const char *name; /* name of this control protocol */ 231 /* event handlers */ 232 void (*Up)(struct sppp *sp); 233 void (*Down)(struct sppp *sp); 234 void (*Open)(struct sppp *sp); 235 void (*Close)(struct sppp *sp); 236 void (*TO)(void *sp); 237 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len); 238 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len); 239 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len); 240 /* actions */ 241 void (*tlu)(struct sppp *sp); 242 void (*tld)(struct sppp *sp); 243 void (*tls)(struct sppp *sp); 244 void (*tlf)(struct sppp *sp); 245 void (*scr)(struct sppp *sp); 246 }; 247 248 static struct sppp *spppq; 249 static kmutex_t *spppq_lock = NULL; 250 static callout_t keepalive_ch; 251 252 #define SPPPQ_LOCK() if (spppq_lock) \ 253 mutex_enter(spppq_lock); 254 #define SPPPQ_UNLOCK() if (spppq_lock) \ 255 mutex_exit(spppq_lock); 256 257 #define SPPP_LOCK(_sp, _op) rw_enter(&(_sp)->pp_lock, (_op)) 258 #define SPPP_UNLOCK(_sp) rw_exit(&(_sp)->pp_lock) 259 #define SPPP_WLOCKED(_sp) rw_write_held(&(_sp)->pp_lock) 260 #define SPPP_UPGRADE(_sp) do{ \ 261 SPPP_UNLOCK(_sp); \ 262 SPPP_LOCK(_sp, RW_WRITER); \ 263 }while (0) 264 #define SPPP_DOWNGRADE(_sp) rw_downgrade(&(_sp)->pp_lock) 265 266 #ifdef INET 267 #ifndef SPPPSUBR_MPSAFE 268 /* 269 * The following disgusting hack gets around the problem that IP TOS 270 * can't be set yet. We want to put "interactive" traffic on a high 271 * priority queue. To decide if traffic is interactive, we check that 272 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 273 * 274 * XXX is this really still necessary? - joerg - 275 */ 276 static u_short interactive_ports[8] = { 277 0, 513, 0, 0, 278 0, 21, 0, 23, 279 }; 280 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 281 #endif /* SPPPSUBR_MPSAFE */ 282 #endif 283 284 /* almost every function needs these */ 285 #define STDDCL \ 286 struct ifnet *ifp = &sp->pp_if; \ 287 int debug = ifp->if_flags & IFF_DEBUG 288 289 static int sppp_output(struct ifnet *ifp, struct mbuf *m, 290 const struct sockaddr *dst, const struct rtentry *rt); 291 292 static void sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2); 293 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m); 294 295 static void sppp_cp_input(const struct cp *cp, struct sppp *sp, 296 struct mbuf *m); 297 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 298 u_char ident, u_short len, void *data); 299 /* static void sppp_cp_timeout(void *arg); */ 300 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp, 301 int newstate); 302 static void sppp_auth_send(const struct cp *cp, 303 struct sppp *sp, unsigned int type, unsigned int id, 304 ...); 305 306 static void sppp_up_event(const struct cp *cp, struct sppp *sp); 307 static void sppp_down_event(const struct cp *cp, struct sppp *sp); 308 static void sppp_open_event(const struct cp *cp, struct sppp *sp); 309 static void sppp_close_event(const struct cp *cp, struct sppp *sp); 310 static void sppp_to_event(const struct cp *cp, struct sppp *sp); 311 312 static void sppp_null(struct sppp *sp); 313 314 static void sppp_lcp_init(struct sppp *sp); 315 static void sppp_lcp_up(struct sppp *sp); 316 static void sppp_lcp_down(struct sppp *sp); 317 static void sppp_lcp_open(struct sppp *sp); 318 static void sppp_lcp_close(struct sppp *sp); 319 static void sppp_lcp_TO(void *sp); 320 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 321 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 322 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 323 static void sppp_lcp_tlu(struct sppp *sp); 324 static void sppp_lcp_tld(struct sppp *sp); 325 static void sppp_lcp_tls(struct sppp *sp); 326 static void sppp_lcp_tlf(struct sppp *sp); 327 static void sppp_lcp_scr(struct sppp *sp); 328 static void sppp_lcp_check_and_close(struct sppp *sp); 329 static int sppp_ncp_check(struct sppp *sp); 330 331 static void sppp_ipcp_init(struct sppp *sp); 332 static void sppp_ipcp_up(struct sppp *sp); 333 static void sppp_ipcp_down(struct sppp *sp); 334 static void sppp_ipcp_open(struct sppp *sp); 335 static void sppp_ipcp_close(struct sppp *sp); 336 static void sppp_ipcp_TO(void *sp); 337 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 338 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 339 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 340 static void sppp_ipcp_tlu(struct sppp *sp); 341 static void sppp_ipcp_tld(struct sppp *sp); 342 static void sppp_ipcp_tls(struct sppp *sp); 343 static void sppp_ipcp_tlf(struct sppp *sp); 344 static void sppp_ipcp_scr(struct sppp *sp); 345 346 static void sppp_ipv6cp_init(struct sppp *sp); 347 static void sppp_ipv6cp_up(struct sppp *sp); 348 static void sppp_ipv6cp_down(struct sppp *sp); 349 static void sppp_ipv6cp_open(struct sppp *sp); 350 static void sppp_ipv6cp_close(struct sppp *sp); 351 static void sppp_ipv6cp_TO(void *sp); 352 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len); 353 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 354 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 355 static void sppp_ipv6cp_tlu(struct sppp *sp); 356 static void sppp_ipv6cp_tld(struct sppp *sp); 357 static void sppp_ipv6cp_tls(struct sppp *sp); 358 static void sppp_ipv6cp_tlf(struct sppp *sp); 359 static void sppp_ipv6cp_scr(struct sppp *sp); 360 361 static void sppp_pap_input(struct sppp *sp, struct mbuf *m); 362 static void sppp_pap_init(struct sppp *sp); 363 static void sppp_pap_open(struct sppp *sp); 364 static void sppp_pap_close(struct sppp *sp); 365 static void sppp_pap_TO(void *sp); 366 static void sppp_pap_my_TO(void *sp); 367 static void sppp_pap_tlu(struct sppp *sp); 368 static void sppp_pap_tld(struct sppp *sp); 369 static void sppp_pap_scr(struct sppp *sp); 370 371 static void sppp_chap_input(struct sppp *sp, struct mbuf *m); 372 static void sppp_chap_init(struct sppp *sp); 373 static void sppp_chap_open(struct sppp *sp); 374 static void sppp_chap_close(struct sppp *sp); 375 static void sppp_chap_TO(void *sp); 376 static void sppp_chap_tlu(struct sppp *sp); 377 static void sppp_chap_tld(struct sppp *sp); 378 static void sppp_chap_scr(struct sppp *sp); 379 380 static const char *sppp_auth_type_name(u_short proto, u_char type); 381 static const char *sppp_cp_type_name(u_char type); 382 static const char *sppp_dotted_quad(uint32_t addr); 383 static const char *sppp_ipcp_opt_name(u_char opt); 384 #ifdef INET6 385 static const char *sppp_ipv6cp_opt_name(u_char opt); 386 #endif 387 static const char *sppp_lcp_opt_name(u_char opt); 388 static const char *sppp_phase_name(int phase); 389 static const char *sppp_proto_name(u_short proto); 390 static const char *sppp_state_name(int state); 391 static int sppp_params(struct sppp *sp, u_long cmd, void *data); 392 #ifdef INET 393 static void sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, 394 uint32_t *srcmask); 395 static void sppp_set_ip_addrs_work(struct work *wk, struct sppp *sp); 396 static void sppp_set_ip_addrs(struct sppp *sp); 397 static void sppp_clear_ip_addrs_work(struct work *wk, struct sppp *sp); 398 static void sppp_clear_ip_addrs(struct sppp *sp); 399 static void sppp_update_ip_addrs_work(struct work *wk, void *arg); 400 #endif 401 static void sppp_keepalive(void *dummy); 402 static void sppp_phase_network(struct sppp *sp); 403 static void sppp_print_bytes(const u_char *p, u_short len); 404 static void sppp_print_string(const char *p, u_short len); 405 #ifdef INET6 406 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, 407 struct in6_addr *dst, struct in6_addr *srcmask); 408 #ifdef IPV6CP_MYIFID_DYN 409 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src); 410 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src); 411 #endif 412 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src); 413 #endif 414 415 static void sppp_notify_up(struct sppp *); 416 static void sppp_notify_down(struct sppp *); 417 static void sppp_notify_tls_wlocked(struct sppp *); 418 static void sppp_notify_tlf_wlocked(struct sppp *); 419 #ifdef INET6 420 static void sppp_notify_con_wlocked(struct sppp *); 421 #endif 422 static void sppp_notify_con(struct sppp *); 423 424 static void sppp_notify_chg_wlocked(struct sppp *); 425 426 427 /* our control protocol descriptors */ 428 static const struct cp lcp = { 429 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 430 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close, 431 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak, 432 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf, 433 sppp_lcp_scr 434 }; 435 436 static const struct cp ipcp = { 437 PPP_IPCP, IDX_IPCP, 438 #ifdef INET 439 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 440 #else 441 0, 442 #endif 443 "ipcp", 444 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close, 445 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak, 446 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf, 447 sppp_ipcp_scr 448 }; 449 450 static const struct cp ipv6cp = { 451 PPP_IPV6CP, IDX_IPV6CP, 452 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 453 CP_NCP, 454 #else 455 0, 456 #endif 457 "ipv6cp", 458 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close, 459 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak, 460 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf, 461 sppp_ipv6cp_scr 462 }; 463 464 static const struct cp pap = { 465 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 466 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close, 467 sppp_pap_TO, 0, 0, 0, 468 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null, 469 sppp_pap_scr 470 }; 471 472 static const struct cp chap = { 473 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 474 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close, 475 sppp_chap_TO, 0, 0, 0, 476 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null, 477 sppp_chap_scr 478 }; 479 480 static const struct cp *cps[IDX_COUNT] = { 481 &lcp, /* IDX_LCP */ 482 &ipcp, /* IDX_IPCP */ 483 &ipv6cp, /* IDX_IPV6CP */ 484 &pap, /* IDX_PAP */ 485 &chap, /* IDX_CHAP */ 486 }; 487 488 static void 489 sppp_change_phase(struct sppp *sp, int phase) 490 { 491 STDDCL; 492 493 KASSERT(SPPP_WLOCKED(sp)); 494 495 if (sp->pp_phase == phase) 496 return; 497 498 sp->pp_phase = phase; 499 500 if (phase == SPPP_PHASE_NETWORK) 501 if_link_state_change(ifp, LINK_STATE_UP); 502 else 503 if_link_state_change(ifp, LINK_STATE_DOWN); 504 505 if (debug) 506 { 507 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 508 sppp_phase_name(sp->pp_phase)); 509 } 510 } 511 512 /* 513 * Exported functions, comprising our interface to the lower layer. 514 */ 515 516 /* 517 * Process the received packet. 518 */ 519 void 520 sppp_input(struct ifnet *ifp, struct mbuf *m) 521 { 522 struct ppp_header *h = NULL; 523 pktqueue_t *pktq = NULL; 524 struct ifqueue *inq = NULL; 525 uint16_t protocol; 526 struct sppp *sp = (struct sppp *)ifp; 527 int debug = ifp->if_flags & IFF_DEBUG; 528 int isr = 0; 529 530 SPPP_LOCK(sp, RW_READER); 531 532 if (ifp->if_flags & IFF_UP) { 533 /* Count received bytes, add hardware framing */ 534 ifp->if_ibytes += m->m_pkthdr.len + sp->pp_framebytes; 535 /* Note time of last receive */ 536 sp->pp_last_receive = time_uptime; 537 } 538 539 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 540 /* Too small packet, drop it. */ 541 if (debug) 542 log(LOG_DEBUG, 543 "%s: input packet is too small, %d bytes\n", 544 ifp->if_xname, m->m_pkthdr.len); 545 drop: 546 ++ifp->if_ierrors; 547 ++ifp->if_iqdrops; 548 m_freem(m); 549 SPPP_UNLOCK(sp); 550 return; 551 } 552 553 if (sp->pp_flags & PP_NOFRAMING) { 554 memcpy(&protocol, mtod(m, void *), 2); 555 protocol = ntohs(protocol); 556 m_adj(m, 2); 557 } else { 558 559 /* Get PPP header. */ 560 h = mtod(m, struct ppp_header *); 561 m_adj(m, PPP_HEADER_LEN); 562 563 switch (h->address) { 564 case PPP_ALLSTATIONS: 565 if (h->control != PPP_UI) 566 goto invalid; 567 if (sp->pp_flags & PP_CISCO) { 568 if (debug) 569 log(LOG_DEBUG, 570 "%s: PPP packet in Cisco mode " 571 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 572 ifp->if_xname, 573 h->address, h->control, ntohs(h->protocol)); 574 goto drop; 575 } 576 break; 577 case CISCO_MULTICAST: 578 case CISCO_UNICAST: 579 /* Don't check the control field here (RFC 1547). */ 580 if (! (sp->pp_flags & PP_CISCO)) { 581 if (debug) 582 log(LOG_DEBUG, 583 "%s: Cisco packet in PPP mode " 584 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 585 ifp->if_xname, 586 h->address, h->control, ntohs(h->protocol)); 587 goto drop; 588 } 589 switch (ntohs(h->protocol)) { 590 default: 591 ++ifp->if_noproto; 592 goto invalid; 593 case CISCO_KEEPALIVE: 594 SPPP_UNLOCK(sp); 595 sppp_cisco_input((struct sppp *) ifp, m); 596 m_freem(m); 597 return; 598 #ifdef INET 599 case ETHERTYPE_IP: 600 pktq = ip_pktq; 601 break; 602 #endif 603 #ifdef INET6 604 case ETHERTYPE_IPV6: 605 pktq = ip6_pktq; 606 break; 607 #endif 608 } 609 goto queue_pkt; 610 default: /* Invalid PPP packet. */ 611 invalid: 612 if (debug) 613 log(LOG_DEBUG, 614 "%s: invalid input packet " 615 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 616 ifp->if_xname, 617 h->address, h->control, ntohs(h->protocol)); 618 goto drop; 619 } 620 protocol = ntohs(h->protocol); 621 } 622 623 switch (protocol) { 624 default: 625 if (sp->state[IDX_LCP] == STATE_OPENED) { 626 uint16_t prot = htons(protocol); 627 628 SPPP_UPGRADE(sp); 629 sppp_cp_send(sp, PPP_LCP, PROTO_REJ, 630 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2, 631 &prot); 632 SPPP_DOWNGRADE(sp); 633 } 634 if (debug) 635 log(LOG_DEBUG, 636 "%s: invalid input protocol " 637 "<proto=0x%x>\n", ifp->if_xname, ntohs(protocol)); 638 ++ifp->if_noproto; 639 goto drop; 640 case PPP_LCP: 641 SPPP_UNLOCK(sp); 642 sppp_cp_input(&lcp, sp, m); 643 m_freem(m); 644 return; 645 case PPP_PAP: 646 SPPP_UNLOCK(sp); 647 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 648 sppp_pap_input(sp, m); 649 } 650 m_freem(m); 651 return; 652 case PPP_CHAP: 653 SPPP_UNLOCK(sp); 654 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 655 sppp_chap_input(sp, m); 656 } 657 m_freem(m); 658 return; 659 #ifdef INET 660 case PPP_IPCP: 661 SPPP_UNLOCK(sp); 662 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 663 sppp_cp_input(&ipcp, sp, m); 664 } 665 m_freem(m); 666 return; 667 case PPP_IP: 668 if (sp->state[IDX_IPCP] == STATE_OPENED) { 669 sp->pp_last_activity = time_uptime; 670 pktq = ip_pktq; 671 } 672 break; 673 #endif 674 #ifdef INET6 675 case PPP_IPV6CP: 676 SPPP_UNLOCK(sp); 677 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 678 sppp_cp_input(&ipv6cp, sp, m); 679 } 680 m_freem(m); 681 return; 682 683 case PPP_IPV6: 684 if (sp->state[IDX_IPV6CP] == STATE_OPENED) { 685 sp->pp_last_activity = time_uptime; 686 pktq = ip6_pktq; 687 } 688 break; 689 #endif 690 } 691 692 queue_pkt: 693 if ((ifp->if_flags & IFF_UP) == 0 || (!inq && !pktq)) { 694 goto drop; 695 } 696 697 /* Check queue. */ 698 if (__predict_true(pktq)) { 699 if (__predict_false(!pktq_enqueue(pktq, m, 0))) { 700 goto drop; 701 } 702 SPPP_UNLOCK(sp); 703 return; 704 } 705 706 SPPP_UNLOCK(sp); 707 708 IFQ_LOCK(inq); 709 if (IF_QFULL(inq)) { 710 /* Queue overflow. */ 711 IF_DROP(inq); 712 IFQ_UNLOCK(inq); 713 if (debug) 714 log(LOG_DEBUG, "%s: protocol queue overflow\n", 715 ifp->if_xname); 716 717 SPPP_LOCK(sp, RW_READER); 718 goto drop; 719 } 720 IF_ENQUEUE(inq, m); 721 IFQ_UNLOCK(inq); 722 schednetisr(isr); 723 } 724 725 /* 726 * Enqueue transmit packet. 727 */ 728 static int 729 sppp_output(struct ifnet *ifp, struct mbuf *m, 730 const struct sockaddr *dst, const struct rtentry *rt) 731 { 732 struct sppp *sp = (struct sppp *) ifp; 733 struct ppp_header *h = NULL; 734 #ifndef SPPPSUBR_MPSAFE 735 struct ifqueue *ifq = NULL; /* XXX */ 736 #endif 737 int s, error = 0; 738 uint16_t protocol; 739 size_t pktlen; 740 741 s = splnet(); 742 SPPP_LOCK(sp, RW_READER); 743 744 sp->pp_last_activity = time_uptime; 745 746 if ((ifp->if_flags & IFF_UP) == 0 || 747 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 748 SPPP_UNLOCK(sp); 749 splx(s); 750 751 m_freem(m); 752 753 return (ENETDOWN); 754 } 755 756 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 757 /* 758 * Interface is not yet running, but auto-dial. Need 759 * to start LCP for it. 760 */ 761 ifp->if_flags |= IFF_RUNNING; 762 763 SPPP_UNLOCK(sp); 764 splx(s); 765 766 SPPP_LOCK(sp, RW_WRITER); 767 lcp.Open(sp); 768 SPPP_UNLOCK(sp); 769 770 s = splnet(); 771 SPPP_LOCK(sp, RW_READER); 772 } 773 774 /* 775 * If the queueing discipline needs packet classification, 776 * do it before prepending link headers. 777 */ 778 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family); 779 780 #ifdef INET 781 if (dst->sa_family == AF_INET) { 782 struct ip *ip = NULL; 783 #ifndef SPPPSUBR_MPSAFE 784 struct tcphdr *th = NULL; 785 #endif 786 787 if (m->m_len >= sizeof(struct ip)) { 788 ip = mtod(m, struct ip *); 789 #ifndef SPPPSUBR_MPSAFE 790 if (ip->ip_p == IPPROTO_TCP && 791 m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) + 792 sizeof(struct tcphdr)) { 793 th = (struct tcphdr *) 794 ((char *)ip + (ip->ip_hl << 2)); 795 } 796 #endif 797 } else 798 ip = NULL; 799 800 /* 801 * When using dynamic local IP address assignment by using 802 * 0.0.0.0 as a local address, the first TCP session will 803 * not connect because the local TCP checksum is computed 804 * using 0.0.0.0 which will later become our real IP address 805 * so the TCP checksum computed at the remote end will 806 * become invalid. So we 807 * - don't let packets with src ip addr 0 thru 808 * - we flag TCP packets with src ip 0 as an error 809 */ 810 if (ip && ip->ip_src.s_addr == INADDR_ANY) { 811 uint8_t proto = ip->ip_p; 812 813 SPPP_UNLOCK(sp); 814 splx(s); 815 816 m_freem(m); 817 if (proto == IPPROTO_TCP) 818 return (EADDRNOTAVAIL); 819 else 820 return (0); 821 } 822 823 #ifndef SPPPSUBR_MPSAFE 824 /* 825 * Put low delay, telnet, rlogin and ftp control packets 826 * in front of the queue. 827 */ 828 if (!IF_QFULL(&sp->pp_fastq) && 829 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || 830 (th && (INTERACTIVE(ntohs(th->th_sport)) || 831 INTERACTIVE(ntohs(th->th_dport)))))) 832 ifq = &sp->pp_fastq; 833 #endif /* !SPPPSUBR_MPSAFE */ 834 } 835 #endif 836 837 #ifdef INET6 838 if (dst->sa_family == AF_INET6) { 839 /* XXX do something tricky here? */ 840 } 841 #endif 842 843 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 844 /* 845 * Prepend general data packet PPP header. For now, IP only. 846 */ 847 M_PREPEND(m, PPP_HEADER_LEN, M_DONTWAIT); 848 if (! m) { 849 if (ifp->if_flags & IFF_DEBUG) 850 log(LOG_DEBUG, "%s: no memory for transmit header\n", 851 ifp->if_xname); 852 ++ifp->if_oerrors; 853 SPPP_UNLOCK(sp); 854 splx(s); 855 return (ENOBUFS); 856 } 857 /* 858 * May want to check size of packet 859 * (albeit due to the implementation it's always enough) 860 */ 861 h = mtod(m, struct ppp_header *); 862 if (sp->pp_flags & PP_CISCO) { 863 h->address = CISCO_UNICAST; /* unicast address */ 864 h->control = 0; 865 } else { 866 h->address = PPP_ALLSTATIONS; /* broadcast address */ 867 h->control = PPP_UI; /* Unnumbered Info */ 868 } 869 } 870 871 switch (dst->sa_family) { 872 #ifdef INET 873 case AF_INET: /* Internet Protocol */ 874 if (sp->pp_flags & PP_CISCO) 875 protocol = htons(ETHERTYPE_IP); 876 else { 877 /* 878 * Don't choke with an ENETDOWN early. It's 879 * possible that we just started dialing out, 880 * so don't drop the packet immediately. If 881 * we notice that we run out of buffer space 882 * below, we will however remember that we are 883 * not ready to carry IP packets, and return 884 * ENETDOWN, as opposed to ENOBUFS. 885 */ 886 protocol = htons(PPP_IP); 887 if (sp->state[IDX_IPCP] != STATE_OPENED) 888 error = ENETDOWN; 889 } 890 break; 891 #endif 892 #ifdef INET6 893 case AF_INET6: /* Internet Protocol version 6 */ 894 if (sp->pp_flags & PP_CISCO) 895 protocol = htons(ETHERTYPE_IPV6); 896 else { 897 /* 898 * Don't choke with an ENETDOWN early. It's 899 * possible that we just started dialing out, 900 * so don't drop the packet immediately. If 901 * we notice that we run out of buffer space 902 * below, we will however remember that we are 903 * not ready to carry IP packets, and return 904 * ENETDOWN, as opposed to ENOBUFS. 905 */ 906 protocol = htons(PPP_IPV6); 907 if (sp->state[IDX_IPV6CP] != STATE_OPENED) 908 error = ENETDOWN; 909 } 910 break; 911 #endif 912 default: 913 m_freem(m); 914 ++ifp->if_oerrors; 915 SPPP_UNLOCK(sp); 916 splx(s); 917 return (EAFNOSUPPORT); 918 } 919 920 if (sp->pp_flags & PP_NOFRAMING) { 921 M_PREPEND(m, 2, M_DONTWAIT); 922 if (m == NULL) { 923 if (ifp->if_flags & IFF_DEBUG) 924 log(LOG_DEBUG, "%s: no memory for transmit header\n", 925 ifp->if_xname); 926 ++ifp->if_oerrors; 927 SPPP_UNLOCK(sp); 928 splx(s); 929 return (ENOBUFS); 930 } 931 *mtod(m, uint16_t *) = protocol; 932 } else { 933 h->protocol = protocol; 934 } 935 936 pktlen = m->m_pkthdr.len; 937 #ifdef SPPPSUBR_MPSAFE 938 SPPP_UNLOCK(sp); 939 error = if_transmit_lock(ifp, m); 940 SPPP_LOCK(sp, RW_READER); 941 if (error == 0) 942 ifp->if_obytes += pktlen + sp->pp_framebytes; 943 #else /* !SPPPSUBR_MPSAFE */ 944 error = ifq_enqueue2(ifp, ifq, m); 945 946 if (error == 0) { 947 /* 948 * Count output packets and bytes. 949 * The packet length includes header + additional hardware 950 * framing according to RFC 1333. 951 */ 952 if (!(ifp->if_flags & IFF_OACTIVE)) { 953 SPPP_UNLOCK(sp); 954 if_start_lock(ifp); 955 SPPP_LOCK(sp, RW_READER); 956 } 957 ifp->if_obytes += pktlen + sp->pp_framebytes; 958 } 959 #endif /* !SPPPSUBR_MPSAFE */ 960 SPPP_UNLOCK(sp); 961 splx(s); 962 return error; 963 } 964 965 static int 966 sppp_mediachange(struct ifnet *ifp) 967 { 968 969 return (0); 970 } 971 972 static void 973 sppp_mediastatus(struct ifnet *ifp, struct ifmediareq *imr) 974 { 975 struct sppp *sp = (struct sppp *)ifp; 976 977 SPPP_LOCK(sp, RW_WRITER); 978 979 switch (ifp->if_link_state) { 980 case LINK_STATE_UP: 981 imr->ifm_status = IFM_AVALID | IFM_ACTIVE; 982 break; 983 case LINK_STATE_DOWN: 984 imr->ifm_status = IFM_AVALID; 985 break; 986 default: 987 /* Should be impossible as we set link state down in attach. */ 988 imr->ifm_status = 0; 989 break; 990 } 991 992 SPPP_UNLOCK(sp); 993 } 994 995 void 996 sppp_attach(struct ifnet *ifp) 997 { 998 struct sppp *sp = (struct sppp *) ifp; 999 1000 /* Initialize keepalive handler. */ 1001 if (! spppq) { 1002 callout_init(&keepalive_ch, CALLOUT_MPSAFE); 1003 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 1004 } 1005 1006 if (! spppq_lock) 1007 spppq_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_SOFTNET); 1008 1009 /* Insert new entry into the keepalive list. */ 1010 sp->pp_next = spppq; 1011 spppq = sp; 1012 1013 sp->pp_if.if_type = IFT_PPP; 1014 sp->pp_if.if_output = sppp_output; 1015 sp->pp_fastq.ifq_maxlen = 32; 1016 sp->pp_cpq.ifq_maxlen = 20; 1017 sp->pp_loopcnt = 0; 1018 sp->pp_alivecnt = 0; 1019 sp->pp_last_activity = 0; 1020 sp->pp_last_receive = 0; 1021 sp->pp_maxalive = DEFAULT_MAXALIVECNT; 1022 sp->pp_max_noreceive = DEFAULT_NORECV_TIME; 1023 sp->pp_idle_timeout = 0; 1024 memset(&sp->pp_seq[0], 0, sizeof(sp->pp_seq)); 1025 memset(&sp->pp_rseq[0], 0, sizeof(sp->pp_rseq)); 1026 sp->pp_auth_failures = 0; 1027 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 1028 sp->pp_phase = SPPP_PHASE_DEAD; 1029 sp->pp_up = sppp_notify_up; 1030 sp->pp_down = sppp_notify_down; 1031 rw_init(&sp->pp_lock); 1032 1033 if_alloc_sadl(ifp); 1034 1035 /* Lets not beat about the bush, we know we're down. */ 1036 ifp->if_link_state = LINK_STATE_DOWN; 1037 /* There is no media for PPP, but it's needed to report link status. */ 1038 ifmedia_init(&sp->pp_im, 0, sppp_mediachange, sppp_mediastatus); 1039 1040 memset(&sp->myauth, 0, sizeof sp->myauth); 1041 memset(&sp->hisauth, 0, sizeof sp->hisauth); 1042 SPPP_LOCK(sp, RW_WRITER); 1043 sppp_lcp_init(sp); 1044 sppp_ipcp_init(sp); 1045 sppp_ipv6cp_init(sp); 1046 sppp_pap_init(sp); 1047 sppp_chap_init(sp); 1048 SPPP_UNLOCK(sp); 1049 } 1050 1051 void 1052 sppp_detach(struct ifnet *ifp) 1053 { 1054 struct sppp **q, *p, *sp = (struct sppp *) ifp; 1055 1056 /* Remove the entry from the keepalive list. */ 1057 SPPPQ_LOCK(); 1058 for (q = &spppq; (p = *q); q = &p->pp_next) 1059 if (p == sp) { 1060 *q = p->pp_next; 1061 break; 1062 } 1063 SPPPQ_UNLOCK(); 1064 1065 if (! spppq) { 1066 /* Stop keepalive handler. */ 1067 callout_stop(&keepalive_ch); 1068 mutex_obj_free(spppq_lock); 1069 spppq_lock = NULL; 1070 } 1071 1072 SPPP_LOCK(sp, RW_WRITER); 1073 1074 /* to avoid workqueue enqueued */ 1075 atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1); 1076 workqueue_wait(sp->ipcp.update_addrs_wq, &sp->ipcp.update_addrs_wk); 1077 workqueue_destroy(sp->ipcp.update_addrs_wq); 1078 pcq_destroy(sp->ipcp.update_addrs_q); 1079 1080 callout_stop(&sp->ch[IDX_LCP]); 1081 callout_stop(&sp->ch[IDX_IPCP]); 1082 callout_stop(&sp->ch[IDX_PAP]); 1083 callout_stop(&sp->ch[IDX_CHAP]); 1084 #ifdef INET6 1085 callout_stop(&sp->ch[IDX_IPV6CP]); 1086 #endif 1087 callout_stop(&sp->pap_my_to_ch); 1088 1089 /* free authentication info */ 1090 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 1091 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 1092 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 1093 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 1094 SPPP_UNLOCK(sp); 1095 rw_destroy(&sp->pp_lock); 1096 1097 /* Safety - shouldn't be needed as there is no media to set. */ 1098 ifmedia_delete_instance(&sp->pp_im, IFM_INST_ANY); 1099 } 1100 1101 /* 1102 * Flush the interface output queue. 1103 */ 1104 void 1105 sppp_flush(struct ifnet *ifp) 1106 { 1107 struct sppp *sp = (struct sppp *) ifp; 1108 1109 SPPP_LOCK(sp, RW_WRITER); 1110 IFQ_PURGE(&sp->pp_if.if_snd); 1111 IF_PURGE(&sp->pp_fastq); 1112 IF_PURGE(&sp->pp_cpq); 1113 SPPP_UNLOCK(sp); 1114 } 1115 1116 /* 1117 * Check if the output queue is empty. 1118 */ 1119 int 1120 sppp_isempty(struct ifnet *ifp) 1121 { 1122 struct sppp *sp = (struct sppp *) ifp; 1123 int empty, s; 1124 1125 s = splnet(); 1126 SPPP_LOCK(sp, RW_READER); 1127 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1128 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1129 SPPP_UNLOCK(sp); 1130 splx(s); 1131 return (empty); 1132 } 1133 1134 /* 1135 * Get next packet to send. 1136 */ 1137 struct mbuf * 1138 sppp_dequeue(struct ifnet *ifp) 1139 { 1140 struct sppp *sp = (struct sppp *) ifp; 1141 struct mbuf *m; 1142 int s; 1143 1144 s = splnet(); 1145 SPPP_LOCK(sp, RW_WRITER); 1146 /* 1147 * Process only the control protocol queue until we have at 1148 * least one NCP open. 1149 * 1150 * Do always serve all three queues in Cisco mode. 1151 */ 1152 IF_DEQUEUE(&sp->pp_cpq, m); 1153 if (m == NULL && 1154 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { 1155 IF_DEQUEUE(&sp->pp_fastq, m); 1156 if (m == NULL) 1157 IFQ_DEQUEUE(&sp->pp_if.if_snd, m); 1158 } 1159 SPPP_UNLOCK(sp); 1160 splx(s); 1161 return m; 1162 } 1163 1164 /* 1165 * Process an ioctl request. Called on low priority level. 1166 */ 1167 int 1168 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1169 { 1170 struct lwp *l = curlwp; /* XXX */ 1171 struct ifreq *ifr = (struct ifreq *) data; 1172 struct ifaddr *ifa = (struct ifaddr *) data; 1173 struct sppp *sp = (struct sppp *) ifp; 1174 int s, error=0, going_up, going_down, newmode; 1175 1176 s = splnet(); 1177 switch (cmd) { 1178 case SIOCINITIFADDR: 1179 ifa->ifa_rtrequest = p2p_rtrequest; 1180 break; 1181 1182 case SIOCSIFFLAGS: 1183 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1184 break; 1185 1186 SPPP_LOCK(sp, RW_WRITER); 1187 going_up = ifp->if_flags & IFF_UP && 1188 (ifp->if_flags & IFF_RUNNING) == 0; 1189 going_down = (ifp->if_flags & IFF_UP) == 0 && 1190 ifp->if_flags & IFF_RUNNING; 1191 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1192 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1193 /* sanity */ 1194 newmode = IFF_PASSIVE; 1195 ifp->if_flags &= ~IFF_AUTO; 1196 } 1197 1198 if (going_up || going_down) { 1199 lcp.Close(sp); 1200 } 1201 if (going_up && newmode == 0) { 1202 /* neither auto-dial nor passive */ 1203 ifp->if_flags |= IFF_RUNNING; 1204 if (!(sp->pp_flags & PP_CISCO)) 1205 lcp.Open(sp); 1206 } else if (going_down) { 1207 SPPP_UNLOCK(sp); 1208 sppp_flush(ifp); 1209 SPPP_LOCK(sp, RW_WRITER); 1210 1211 ifp->if_flags &= ~IFF_RUNNING; 1212 } 1213 SPPP_UNLOCK(sp); 1214 break; 1215 1216 case SIOCSIFMTU: 1217 if (ifr->ifr_mtu < PPP_MINMRU || 1218 ifr->ifr_mtu > sp->lcp.their_mru) { 1219 error = EINVAL; 1220 break; 1221 } 1222 /*FALLTHROUGH*/ 1223 case SIOCGIFMTU: 1224 if ((error = ifioctl_common(ifp, cmd, data)) == ENETRESET) 1225 error = 0; 1226 break; 1227 case SIOCADDMULTI: 1228 case SIOCDELMULTI: 1229 break; 1230 1231 case SPPPSETAUTHCFG: 1232 case SPPPSETLCPCFG: 1233 case SPPPSETIDLETO: 1234 case SPPPSETAUTHFAILURE: 1235 case SPPPSETDNSOPTS: 1236 case SPPPSETKEEPALIVE: 1237 #if defined(COMPAT_50) || defined(MODULAR) 1238 case __SPPPSETIDLETO50: 1239 case __SPPPSETKEEPALIVE50: 1240 #endif /* COMPAT_50 || MODULAR */ 1241 error = kauth_authorize_network(l->l_cred, 1242 KAUTH_NETWORK_INTERFACE, 1243 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd, 1244 NULL); 1245 if (error) 1246 break; 1247 error = sppp_params(sp, cmd, data); 1248 break; 1249 1250 case SPPPGETAUTHCFG: 1251 case SPPPGETLCPCFG: 1252 case SPPPGETAUTHFAILURES: 1253 error = kauth_authorize_network(l->l_cred, 1254 KAUTH_NETWORK_INTERFACE, 1255 KAUTH_REQ_NETWORK_INTERFACE_GETPRIV, ifp, (void *)cmd, 1256 NULL); 1257 if (error) 1258 break; 1259 error = sppp_params(sp, cmd, data); 1260 break; 1261 1262 case SPPPGETSTATUS: 1263 case SPPPGETSTATUSNCP: 1264 case SPPPGETIDLETO: 1265 case SPPPGETDNSOPTS: 1266 case SPPPGETDNSADDRS: 1267 case SPPPGETKEEPALIVE: 1268 #if defined(COMPAT_50) || defined(MODULAR) 1269 case __SPPPGETIDLETO50: 1270 case __SPPPGETKEEPALIVE50: 1271 #endif /* COMPAT_50 || MODULAR */ 1272 error = sppp_params(sp, cmd, data); 1273 break; 1274 1275 case SIOCGIFMEDIA: 1276 error = ifmedia_ioctl(ifp, ifr, &sp->pp_im, cmd); 1277 break; 1278 1279 default: 1280 error = ifioctl_common(ifp, cmd, data); 1281 break; 1282 } 1283 splx(s); 1284 return (error); 1285 } 1286 1287 1288 /* 1289 * Cisco framing implementation. 1290 */ 1291 1292 /* 1293 * Handle incoming Cisco keepalive protocol packets. 1294 */ 1295 static void 1296 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1297 { 1298 STDDCL; 1299 struct cisco_packet *h; 1300 #ifdef INET 1301 uint32_t me, mymask = 0; /* XXX: GCC */ 1302 #endif 1303 1304 SPPP_LOCK(sp, RW_WRITER); 1305 1306 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1307 if (debug) 1308 log(LOG_DEBUG, 1309 "%s: cisco invalid packet length: %d bytes\n", 1310 ifp->if_xname, m->m_pkthdr.len); 1311 SPPP_UNLOCK(sp); 1312 return; 1313 } 1314 h = mtod(m, struct cisco_packet *); 1315 if (debug) 1316 log(LOG_DEBUG, 1317 "%s: cisco input: %d bytes " 1318 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1319 ifp->if_xname, m->m_pkthdr.len, 1320 ntohl(h->type), h->par1, h->par2, (u_int)h->rel, 1321 (u_int)h->time0, (u_int)h->time1); 1322 switch (ntohl(h->type)) { 1323 default: 1324 if (debug) 1325 addlog("%s: cisco unknown packet type: 0x%x\n", 1326 ifp->if_xname, ntohl(h->type)); 1327 break; 1328 case CISCO_ADDR_REPLY: 1329 /* Reply on address request, ignore */ 1330 break; 1331 case CISCO_KEEPALIVE_REQ: 1332 sp->pp_alivecnt = 0; 1333 sp->pp_rseq[IDX_LCP] = ntohl(h->par1); 1334 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 1335 /* Local and remote sequence numbers are equal. 1336 * Probably, the line is in loopback mode. */ 1337 if (sp->pp_loopcnt >= LOOPALIVECNT) { 1338 printf ("%s: loopback\n", 1339 ifp->if_xname); 1340 sp->pp_loopcnt = 0; 1341 if (ifp->if_flags & IFF_UP) { 1342 SPPP_UNLOCK(sp); 1343 if_down(ifp); 1344 SPPP_LOCK(sp, RW_WRITER); 1345 1346 IF_PURGE(&sp->pp_cpq); 1347 } 1348 } 1349 ++sp->pp_loopcnt; 1350 1351 /* Generate new local sequence number */ 1352 sp->pp_seq[IDX_LCP] = cprng_fast32(); 1353 break; 1354 } 1355 sp->pp_loopcnt = 0; 1356 if (! (ifp->if_flags & IFF_UP) && 1357 (ifp->if_flags & IFF_RUNNING)) { 1358 SPPP_UNLOCK(sp); 1359 if_up(ifp); 1360 SPPP_LOCK(sp, RW_WRITER); 1361 } 1362 break; 1363 case CISCO_ADDR_REQ: 1364 #ifdef INET 1365 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1366 if (me != 0L) 1367 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1368 #endif 1369 break; 1370 } 1371 SPPP_UNLOCK(sp); 1372 } 1373 1374 /* 1375 * Send Cisco keepalive packet. 1376 */ 1377 static void 1378 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1379 { 1380 STDDCL; 1381 struct ppp_header *h; 1382 struct cisco_packet *ch; 1383 struct mbuf *m; 1384 uint32_t t; 1385 1386 KASSERT(SPPP_WLOCKED(sp)); 1387 1388 t = time_uptime * 1000; 1389 MGETHDR(m, M_DONTWAIT, MT_DATA); 1390 if (! m) 1391 return; 1392 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1393 m_reset_rcvif(m); 1394 1395 h = mtod(m, struct ppp_header *); 1396 h->address = CISCO_MULTICAST; 1397 h->control = 0; 1398 h->protocol = htons(CISCO_KEEPALIVE); 1399 1400 ch = (struct cisco_packet *)(h + 1); 1401 ch->type = htonl(type); 1402 ch->par1 = htonl(par1); 1403 ch->par2 = htonl(par2); 1404 ch->rel = -1; 1405 1406 ch->time0 = htons((u_short)(t >> 16)); 1407 ch->time1 = htons((u_short) t); 1408 1409 if (debug) 1410 log(LOG_DEBUG, 1411 "%s: cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1412 ifp->if_xname, ntohl(ch->type), ch->par1, 1413 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1414 (u_int)ch->time1); 1415 1416 if (IF_QFULL(&sp->pp_cpq)) { 1417 IF_DROP(&sp->pp_fastq); 1418 IF_DROP(&ifp->if_snd); 1419 m_freem(m); 1420 ++ifp->if_oerrors; 1421 return; 1422 } 1423 1424 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1425 IF_ENQUEUE(&sp->pp_cpq, m); 1426 1427 if (! (ifp->if_flags & IFF_OACTIVE)) { 1428 SPPP_UNLOCK(sp); 1429 if_start_lock(ifp); 1430 SPPP_LOCK(sp, RW_WRITER); 1431 } 1432 } 1433 1434 /* 1435 * PPP protocol implementation. 1436 */ 1437 1438 /* 1439 * Send PPP control protocol packet. 1440 */ 1441 static void 1442 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1443 u_char ident, u_short len, void *data) 1444 { 1445 STDDCL; 1446 struct lcp_header *lh; 1447 struct mbuf *m; 1448 size_t pkthdrlen; 1449 1450 KASSERT(SPPP_WLOCKED(sp)); 1451 1452 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1453 1454 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1455 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1456 MGETHDR(m, M_DONTWAIT, MT_DATA); 1457 if (! m) { 1458 return; 1459 } 1460 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1461 m_reset_rcvif(m); 1462 1463 if (sp->pp_flags & PP_NOFRAMING) { 1464 *mtod(m, uint16_t *) = htons(proto); 1465 lh = (struct lcp_header *)(mtod(m, uint8_t *) + 2); 1466 } else { 1467 struct ppp_header *h; 1468 h = mtod(m, struct ppp_header *); 1469 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1470 h->control = PPP_UI; /* Unnumbered Info */ 1471 h->protocol = htons(proto); /* Link Control Protocol */ 1472 lh = (struct lcp_header *)(h + 1); 1473 } 1474 lh->type = type; 1475 lh->ident = ident; 1476 lh->len = htons(LCP_HEADER_LEN + len); 1477 if (len) 1478 memcpy(lh + 1, data, len); 1479 1480 if (debug) { 1481 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 1482 ifp->if_xname, 1483 sppp_proto_name(proto), 1484 sppp_cp_type_name(lh->type), lh->ident, ntohs(lh->len)); 1485 if (len) 1486 sppp_print_bytes((u_char *)(lh + 1), len); 1487 addlog(">\n"); 1488 } 1489 if (IF_QFULL(&sp->pp_cpq)) { 1490 IF_DROP(&sp->pp_fastq); 1491 IF_DROP(&ifp->if_snd); 1492 m_freem(m); 1493 ++ifp->if_oerrors; 1494 return; 1495 } 1496 1497 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1498 IF_ENQUEUE(&sp->pp_cpq, m); 1499 1500 1501 if (! (ifp->if_flags & IFF_OACTIVE)) { 1502 SPPP_UNLOCK(sp); 1503 if_start_lock(ifp); 1504 SPPP_LOCK(sp, RW_WRITER); 1505 } 1506 } 1507 1508 /* 1509 * Handle incoming PPP control protocol packets. 1510 */ 1511 static void 1512 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1513 { 1514 STDDCL; 1515 struct lcp_header *h; 1516 int printlen, len = m->m_pkthdr.len; 1517 int rv; 1518 u_char *p; 1519 uint32_t u32; 1520 1521 SPPP_LOCK(sp, RW_WRITER); 1522 1523 if (len < 4) { 1524 if (debug) 1525 log(LOG_DEBUG, 1526 "%s: %s invalid packet length: %d bytes\n", 1527 ifp->if_xname, cp->name, len); 1528 SPPP_UNLOCK(sp); 1529 return; 1530 } 1531 h = mtod(m, struct lcp_header *); 1532 if (debug) { 1533 printlen = ntohs(h->len); 1534 log(LOG_DEBUG, 1535 "%s: %s input(%s): <%s id=0x%x len=%d", 1536 ifp->if_xname, cp->name, 1537 sppp_state_name(sp->state[cp->protoidx]), 1538 sppp_cp_type_name(h->type), h->ident, printlen); 1539 if (len < printlen) 1540 printlen = len; 1541 if (printlen > 4) 1542 sppp_print_bytes((u_char *)(h + 1), printlen - 4); 1543 addlog(">\n"); 1544 } 1545 if (len > ntohs(h->len)) 1546 len = ntohs(h->len); 1547 p = (u_char *)(h + 1); 1548 switch (h->type) { 1549 case CONF_REQ: 1550 if (len < 4) { 1551 if (debug) 1552 addlog("%s: %s invalid conf-req length %d\n", 1553 ifp->if_xname, cp->name, 1554 len); 1555 ++ifp->if_ierrors; 1556 break; 1557 } 1558 /* handle states where RCR doesn't get a SCA/SCN */ 1559 switch (sp->state[cp->protoidx]) { 1560 case STATE_CLOSING: 1561 case STATE_STOPPING: 1562 SPPP_UNLOCK(sp); 1563 return; 1564 case STATE_CLOSED: 1565 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1566 0, 0); 1567 SPPP_UNLOCK(sp); 1568 return; 1569 } 1570 rv = (cp->RCR)(sp, h, len); 1571 if (rv < 0) { 1572 /* fatal error, shut down */ 1573 (cp->tld)(sp); 1574 sppp_lcp_tlf(sp); 1575 SPPP_UNLOCK(sp); 1576 return; 1577 } 1578 switch (sp->state[cp->protoidx]) { 1579 case STATE_OPENED: 1580 (cp->tld)(sp); 1581 (cp->scr)(sp); 1582 /* fall through... */ 1583 case STATE_ACK_SENT: 1584 case STATE_REQ_SENT: 1585 sppp_cp_change_state(cp, sp, rv? 1586 STATE_ACK_SENT: STATE_REQ_SENT); 1587 break; 1588 case STATE_STOPPED: 1589 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1590 (cp->scr)(sp); 1591 sppp_cp_change_state(cp, sp, rv? 1592 STATE_ACK_SENT: STATE_REQ_SENT); 1593 break; 1594 case STATE_ACK_RCVD: 1595 if (rv) { 1596 sppp_cp_change_state(cp, sp, STATE_OPENED); 1597 if (debug) 1598 log(LOG_DEBUG, "%s: %s tlu\n", 1599 ifp->if_xname, 1600 cp->name); 1601 (cp->tlu)(sp); 1602 } else 1603 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1604 break; 1605 default: 1606 printf("%s: %s illegal %s in state %s\n", 1607 ifp->if_xname, cp->name, 1608 sppp_cp_type_name(h->type), 1609 sppp_state_name(sp->state[cp->protoidx])); 1610 ++ifp->if_ierrors; 1611 } 1612 break; 1613 case CONF_ACK: 1614 if (h->ident != sp->confid[cp->protoidx]) { 1615 if (debug) 1616 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1617 ifp->if_xname, cp->name, 1618 h->ident, sp->confid[cp->protoidx]); 1619 ++ifp->if_ierrors; 1620 break; 1621 } 1622 switch (sp->state[cp->protoidx]) { 1623 case STATE_CLOSED: 1624 case STATE_STOPPED: 1625 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1626 break; 1627 case STATE_CLOSING: 1628 case STATE_STOPPING: 1629 break; 1630 case STATE_REQ_SENT: 1631 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1632 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1633 break; 1634 case STATE_OPENED: 1635 (cp->tld)(sp); 1636 /* fall through */ 1637 case STATE_ACK_RCVD: 1638 (cp->scr)(sp); 1639 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1640 break; 1641 case STATE_ACK_SENT: 1642 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1643 sppp_cp_change_state(cp, sp, STATE_OPENED); 1644 if (debug) 1645 log(LOG_DEBUG, "%s: %s tlu\n", 1646 ifp->if_xname, cp->name); 1647 (cp->tlu)(sp); 1648 break; 1649 default: 1650 printf("%s: %s illegal %s in state %s\n", 1651 ifp->if_xname, cp->name, 1652 sppp_cp_type_name(h->type), 1653 sppp_state_name(sp->state[cp->protoidx])); 1654 ++ifp->if_ierrors; 1655 } 1656 break; 1657 case CONF_NAK: 1658 case CONF_REJ: 1659 if (h->ident != sp->confid[cp->protoidx]) { 1660 if (debug) 1661 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1662 ifp->if_xname, cp->name, 1663 h->ident, sp->confid[cp->protoidx]); 1664 ++ifp->if_ierrors; 1665 break; 1666 } 1667 if (h->type == CONF_NAK) 1668 (cp->RCN_nak)(sp, h, len); 1669 else /* CONF_REJ */ 1670 (cp->RCN_rej)(sp, h, len); 1671 1672 switch (sp->state[cp->protoidx]) { 1673 case STATE_CLOSED: 1674 case STATE_STOPPED: 1675 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1676 break; 1677 case STATE_REQ_SENT: 1678 case STATE_ACK_SENT: 1679 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1680 (cp->scr)(sp); 1681 break; 1682 case STATE_OPENED: 1683 (cp->tld)(sp); 1684 /* fall through */ 1685 case STATE_ACK_RCVD: 1686 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1687 (cp->scr)(sp); 1688 break; 1689 case STATE_CLOSING: 1690 case STATE_STOPPING: 1691 break; 1692 default: 1693 printf("%s: %s illegal %s in state %s\n", 1694 ifp->if_xname, cp->name, 1695 sppp_cp_type_name(h->type), 1696 sppp_state_name(sp->state[cp->protoidx])); 1697 ++ifp->if_ierrors; 1698 } 1699 break; 1700 1701 case TERM_REQ: 1702 switch (sp->state[cp->protoidx]) { 1703 case STATE_ACK_RCVD: 1704 case STATE_ACK_SENT: 1705 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1706 /* fall through */ 1707 case STATE_CLOSED: 1708 case STATE_STOPPED: 1709 case STATE_CLOSING: 1710 case STATE_STOPPING: 1711 case STATE_REQ_SENT: 1712 sta: 1713 /* Send Terminate-Ack packet. */ 1714 if (debug) 1715 log(LOG_DEBUG, "%s: %s send terminate-ack\n", 1716 ifp->if_xname, cp->name); 1717 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1718 break; 1719 case STATE_OPENED: 1720 (cp->tld)(sp); 1721 sp->rst_counter[cp->protoidx] = 0; 1722 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1723 goto sta; 1724 default: 1725 printf("%s: %s illegal %s in state %s\n", 1726 ifp->if_xname, cp->name, 1727 sppp_cp_type_name(h->type), 1728 sppp_state_name(sp->state[cp->protoidx])); 1729 ++ifp->if_ierrors; 1730 } 1731 break; 1732 case TERM_ACK: 1733 switch (sp->state[cp->protoidx]) { 1734 case STATE_CLOSED: 1735 case STATE_STOPPED: 1736 case STATE_REQ_SENT: 1737 case STATE_ACK_SENT: 1738 break; 1739 case STATE_CLOSING: 1740 (cp->tlf)(sp); 1741 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1742 sppp_lcp_check_and_close(sp); 1743 break; 1744 case STATE_STOPPING: 1745 (cp->tlf)(sp); 1746 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1747 sppp_lcp_check_and_close(sp); 1748 break; 1749 case STATE_ACK_RCVD: 1750 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1751 break; 1752 case STATE_OPENED: 1753 (cp->tld)(sp); 1754 (cp->scr)(sp); 1755 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1756 break; 1757 default: 1758 printf("%s: %s illegal %s in state %s\n", 1759 ifp->if_xname, cp->name, 1760 sppp_cp_type_name(h->type), 1761 sppp_state_name(sp->state[cp->protoidx])); 1762 ++ifp->if_ierrors; 1763 } 1764 break; 1765 case CODE_REJ: 1766 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1767 log(LOG_INFO, 1768 "%s: %s: ignoring RXJ (%s) for code ?, " 1769 "danger will robinson\n", 1770 ifp->if_xname, cp->name, 1771 sppp_cp_type_name(h->type)); 1772 switch (sp->state[cp->protoidx]) { 1773 case STATE_CLOSED: 1774 case STATE_STOPPED: 1775 case STATE_REQ_SENT: 1776 case STATE_ACK_SENT: 1777 case STATE_CLOSING: 1778 case STATE_STOPPING: 1779 case STATE_OPENED: 1780 break; 1781 case STATE_ACK_RCVD: 1782 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1783 break; 1784 default: 1785 printf("%s: %s illegal %s in state %s\n", 1786 ifp->if_xname, cp->name, 1787 sppp_cp_type_name(h->type), 1788 sppp_state_name(sp->state[cp->protoidx])); 1789 ++ifp->if_ierrors; 1790 } 1791 break; 1792 case PROTO_REJ: 1793 { 1794 int catastrophic; 1795 const struct cp *upper; 1796 int i; 1797 uint16_t proto; 1798 1799 catastrophic = 0; 1800 upper = NULL; 1801 proto = p[0] << 8 | p[1]; 1802 for (i = 0; i < IDX_COUNT; i++) { 1803 if (cps[i]->proto == proto) { 1804 upper = cps[i]; 1805 break; 1806 } 1807 } 1808 if (upper == NULL) 1809 catastrophic++; 1810 1811 if (debug) 1812 log(LOG_INFO, 1813 "%s: %s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1814 ifp->if_xname, cp->name, catastrophic ? '-' : '+', 1815 sppp_cp_type_name(h->type), proto, 1816 upper ? upper->name : "unknown", 1817 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1818 1819 /* 1820 * if we got RXJ+ against conf-req, the peer does not implement 1821 * this particular protocol type. terminate the protocol. 1822 */ 1823 if (upper && !catastrophic) { 1824 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1825 upper->Close(sp); 1826 break; 1827 } 1828 } 1829 1830 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1831 switch (sp->state[cp->protoidx]) { 1832 case STATE_CLOSED: 1833 case STATE_STOPPED: 1834 case STATE_REQ_SENT: 1835 case STATE_ACK_SENT: 1836 case STATE_CLOSING: 1837 case STATE_STOPPING: 1838 case STATE_OPENED: 1839 break; 1840 case STATE_ACK_RCVD: 1841 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1842 break; 1843 default: 1844 printf("%s: %s illegal %s in state %s\n", 1845 ifp->if_xname, cp->name, 1846 sppp_cp_type_name(h->type), 1847 sppp_state_name(sp->state[cp->protoidx])); 1848 ++ifp->if_ierrors; 1849 } 1850 break; 1851 } 1852 case DISC_REQ: 1853 if (cp->proto != PPP_LCP) 1854 goto illegal; 1855 /* Discard the packet. */ 1856 break; 1857 case ECHO_REQ: 1858 if (cp->proto != PPP_LCP) 1859 goto illegal; 1860 if (sp->state[cp->protoidx] != STATE_OPENED) { 1861 if (debug) 1862 addlog("%s: lcp echo req but lcp closed\n", 1863 ifp->if_xname); 1864 ++ifp->if_ierrors; 1865 break; 1866 } 1867 if (len < 8) { 1868 if (debug) 1869 addlog("%s: invalid lcp echo request " 1870 "packet length: %d bytes\n", 1871 ifp->if_xname, len); 1872 break; 1873 } 1874 memcpy(&u32, h + 1, sizeof u32); 1875 if (ntohl(u32) == sp->lcp.magic) { 1876 /* Line loopback mode detected. */ 1877 printf("%s: loopback\n", ifp->if_xname); 1878 SPPP_UNLOCK(sp); 1879 if_down(ifp); 1880 SPPP_LOCK(sp, RW_WRITER); 1881 1882 IF_PURGE(&sp->pp_cpq); 1883 1884 /* Shut down the PPP link. */ 1885 /* XXX */ 1886 lcp.Down(sp); 1887 lcp.Up(sp); 1888 break; 1889 } 1890 u32 = htonl(sp->lcp.magic); 1891 memcpy(h + 1, &u32, sizeof u32); 1892 if (debug) 1893 addlog("%s: got lcp echo req, sending echo rep\n", 1894 ifp->if_xname); 1895 sppp_cp_send(sp, PPP_LCP, ECHO_REPLY, h->ident, len - 4, 1896 h + 1); 1897 break; 1898 case ECHO_REPLY: 1899 if (cp->proto != PPP_LCP) 1900 goto illegal; 1901 if (h->ident != sp->lcp.echoid) { 1902 ++ifp->if_ierrors; 1903 break; 1904 } 1905 if (len < 8) { 1906 if (debug) 1907 addlog("%s: lcp invalid echo reply " 1908 "packet length: %d bytes\n", 1909 ifp->if_xname, len); 1910 break; 1911 } 1912 if (debug) 1913 addlog("%s: lcp got echo rep\n", 1914 ifp->if_xname); 1915 memcpy(&u32, h + 1, sizeof u32); 1916 if (ntohl(u32) != sp->lcp.magic) 1917 sp->pp_alivecnt = 0; 1918 break; 1919 default: 1920 /* Unknown packet type -- send Code-Reject packet. */ 1921 illegal: 1922 if (debug) 1923 addlog("%s: %s send code-rej for 0x%x\n", 1924 ifp->if_xname, cp->name, h->type); 1925 sppp_cp_send(sp, cp->proto, CODE_REJ, 1926 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 1927 ++ifp->if_ierrors; 1928 } 1929 1930 SPPP_UNLOCK(sp); 1931 } 1932 1933 1934 /* 1935 * The generic part of all Up/Down/Open/Close/TO event handlers. 1936 * Basically, the state transition handling in the automaton. 1937 */ 1938 static void 1939 sppp_up_event(const struct cp *cp, struct sppp *sp) 1940 { 1941 STDDCL; 1942 1943 KASSERT(SPPP_WLOCKED(sp)); 1944 1945 if (debug) 1946 log(LOG_DEBUG, "%s: %s up(%s)\n", 1947 ifp->if_xname, cp->name, 1948 sppp_state_name(sp->state[cp->protoidx])); 1949 1950 switch (sp->state[cp->protoidx]) { 1951 case STATE_INITIAL: 1952 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1953 break; 1954 case STATE_STARTING: 1955 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1956 (cp->scr)(sp); 1957 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1958 break; 1959 default: 1960 printf("%s: %s illegal up in state %s\n", 1961 ifp->if_xname, cp->name, 1962 sppp_state_name(sp->state[cp->protoidx])); 1963 } 1964 } 1965 1966 static void 1967 sppp_down_event(const struct cp *cp, struct sppp *sp) 1968 { 1969 STDDCL; 1970 1971 KASSERT(SPPP_WLOCKED(sp)); 1972 1973 if (debug) 1974 log(LOG_DEBUG, "%s: %s down(%s)\n", 1975 ifp->if_xname, cp->name, 1976 sppp_state_name(sp->state[cp->protoidx])); 1977 1978 switch (sp->state[cp->protoidx]) { 1979 case STATE_CLOSED: 1980 case STATE_CLOSING: 1981 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1982 break; 1983 case STATE_STOPPED: 1984 (cp->tls)(sp); 1985 /* fall through */ 1986 case STATE_STOPPING: 1987 case STATE_REQ_SENT: 1988 case STATE_ACK_RCVD: 1989 case STATE_ACK_SENT: 1990 sppp_cp_change_state(cp, sp, STATE_STARTING); 1991 break; 1992 case STATE_OPENED: 1993 (cp->tld)(sp); 1994 sppp_cp_change_state(cp, sp, STATE_STARTING); 1995 break; 1996 default: 1997 printf("%s: %s illegal down in state %s\n", 1998 ifp->if_xname, cp->name, 1999 sppp_state_name(sp->state[cp->protoidx])); 2000 } 2001 } 2002 2003 2004 static void 2005 sppp_open_event(const struct cp *cp, struct sppp *sp) 2006 { 2007 STDDCL; 2008 2009 KASSERT(SPPP_WLOCKED(sp)); 2010 2011 if (debug) 2012 log(LOG_DEBUG, "%s: %s open(%s)\n", 2013 ifp->if_xname, cp->name, 2014 sppp_state_name(sp->state[cp->protoidx])); 2015 2016 switch (sp->state[cp->protoidx]) { 2017 case STATE_INITIAL: 2018 sppp_cp_change_state(cp, sp, STATE_STARTING); 2019 (cp->tls)(sp); 2020 break; 2021 case STATE_STARTING: 2022 break; 2023 case STATE_CLOSED: 2024 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 2025 (cp->scr)(sp); 2026 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2027 break; 2028 case STATE_STOPPED: 2029 case STATE_STOPPING: 2030 case STATE_REQ_SENT: 2031 case STATE_ACK_RCVD: 2032 case STATE_ACK_SENT: 2033 case STATE_OPENED: 2034 break; 2035 case STATE_CLOSING: 2036 sppp_cp_change_state(cp, sp, STATE_STOPPING); 2037 break; 2038 } 2039 } 2040 2041 2042 static void 2043 sppp_close_event(const struct cp *cp, struct sppp *sp) 2044 { 2045 STDDCL; 2046 2047 KASSERT(SPPP_WLOCKED(sp)); 2048 2049 if (debug) 2050 log(LOG_DEBUG, "%s: %s close(%s)\n", 2051 ifp->if_xname, cp->name, 2052 sppp_state_name(sp->state[cp->protoidx])); 2053 2054 switch (sp->state[cp->protoidx]) { 2055 case STATE_INITIAL: 2056 case STATE_CLOSED: 2057 case STATE_CLOSING: 2058 break; 2059 case STATE_STARTING: 2060 sppp_cp_change_state(cp, sp, STATE_INITIAL); 2061 (cp->tlf)(sp); 2062 break; 2063 case STATE_STOPPED: 2064 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2065 break; 2066 case STATE_STOPPING: 2067 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2068 break; 2069 case STATE_OPENED: 2070 (cp->tld)(sp); 2071 /* fall through */ 2072 case STATE_REQ_SENT: 2073 case STATE_ACK_RCVD: 2074 case STATE_ACK_SENT: 2075 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 2076 sppp_cp_send(sp, cp->proto, TERM_REQ, 2077 ++sp->pp_seq[cp->protoidx], 0, 0); 2078 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2079 break; 2080 } 2081 } 2082 2083 static void 2084 sppp_to_event(const struct cp *cp, struct sppp *sp) 2085 { 2086 STDDCL; 2087 int s; 2088 2089 KASSERT(SPPP_WLOCKED(sp)); 2090 2091 s = splnet(); 2092 2093 if (debug) 2094 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 2095 ifp->if_xname, cp->name, 2096 sppp_state_name(sp->state[cp->protoidx]), 2097 sp->rst_counter[cp->protoidx]); 2098 2099 if (--sp->rst_counter[cp->protoidx] < 0) 2100 /* TO- event */ 2101 switch (sp->state[cp->protoidx]) { 2102 case STATE_CLOSING: 2103 (cp->tlf)(sp); 2104 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2105 sppp_lcp_check_and_close(sp); 2106 break; 2107 case STATE_STOPPING: 2108 (cp->tlf)(sp); 2109 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2110 sppp_lcp_check_and_close(sp); 2111 break; 2112 case STATE_REQ_SENT: 2113 case STATE_ACK_RCVD: 2114 case STATE_ACK_SENT: 2115 (cp->tlf)(sp); 2116 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2117 sppp_lcp_check_and_close(sp); 2118 break; 2119 } 2120 else 2121 /* TO+ event */ 2122 switch (sp->state[cp->protoidx]) { 2123 case STATE_CLOSING: 2124 case STATE_STOPPING: 2125 sppp_cp_send(sp, cp->proto, TERM_REQ, 2126 ++sp->pp_seq[cp->protoidx], 0, 0); 2127 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 2128 cp->TO, sp); 2129 break; 2130 case STATE_REQ_SENT: 2131 case STATE_ACK_RCVD: 2132 (cp->scr)(sp); 2133 /* sppp_cp_change_state() will restart the timer */ 2134 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2135 break; 2136 case STATE_ACK_SENT: 2137 (cp->scr)(sp); 2138 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 2139 cp->TO, sp); 2140 break; 2141 } 2142 2143 splx(s); 2144 } 2145 2146 /* 2147 * Change the state of a control protocol in the state automaton. 2148 * Takes care of starting/stopping the restart timer. 2149 */ 2150 void 2151 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 2152 { 2153 2154 KASSERT(SPPP_WLOCKED(sp)); 2155 2156 sp->state[cp->protoidx] = newstate; 2157 callout_stop(&sp->ch[cp->protoidx]); 2158 switch (newstate) { 2159 case STATE_INITIAL: 2160 case STATE_STARTING: 2161 case STATE_CLOSED: 2162 case STATE_STOPPED: 2163 case STATE_OPENED: 2164 break; 2165 case STATE_CLOSING: 2166 case STATE_STOPPING: 2167 case STATE_REQ_SENT: 2168 case STATE_ACK_RCVD: 2169 case STATE_ACK_SENT: 2170 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 2171 cp->TO, sp); 2172 break; 2173 } 2174 } 2175 2176 /* 2177 *--------------------------------------------------------------------------* 2178 * * 2179 * The LCP implementation. * 2180 * * 2181 *--------------------------------------------------------------------------* 2182 */ 2183 static void 2184 sppp_lcp_init(struct sppp *sp) 2185 { 2186 2187 KASSERT(SPPP_WLOCKED(sp)); 2188 2189 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 2190 sp->lcp.magic = 0; 2191 sp->state[IDX_LCP] = STATE_INITIAL; 2192 sp->fail_counter[IDX_LCP] = 0; 2193 sp->pp_seq[IDX_LCP] = 0; 2194 sp->pp_rseq[IDX_LCP] = 0; 2195 sp->lcp.protos = 0; 2196 2197 /* 2198 * Initialize counters and timeout values. Note that we don't 2199 * use the 3 seconds suggested in RFC 1661 since we are likely 2200 * running on a fast link. XXX We should probably implement 2201 * the exponential backoff option. Note that these values are 2202 * relevant for all control protocols, not just LCP only. 2203 */ 2204 sp->lcp.timeout = 1 * hz; 2205 sp->lcp.max_terminate = 2; 2206 sp->lcp.max_configure = 10; 2207 sp->lcp.max_failure = 10; 2208 callout_init(&sp->ch[IDX_LCP], CALLOUT_MPSAFE); 2209 } 2210 2211 static void 2212 sppp_lcp_up(struct sppp *sp) 2213 { 2214 STDDCL; 2215 2216 KASSERT(SPPP_WLOCKED(sp)); 2217 2218 /* Initialize activity timestamp: opening a connection is an activity */ 2219 sp->pp_last_receive = sp->pp_last_activity = time_uptime; 2220 2221 /* 2222 * If this interface is passive or dial-on-demand, and we are 2223 * still in Initial state, it means we've got an incoming 2224 * call. Activate the interface. 2225 */ 2226 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2227 if (debug) 2228 log(LOG_DEBUG, 2229 "%s: Up event", ifp->if_xname); 2230 ifp->if_flags |= IFF_RUNNING; 2231 if (sp->state[IDX_LCP] == STATE_INITIAL) { 2232 if (debug) 2233 addlog("(incoming call)\n"); 2234 sp->pp_flags |= PP_CALLIN; 2235 lcp.Open(sp); 2236 } else if (debug) 2237 addlog("\n"); 2238 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 && 2239 (sp->state[IDX_LCP] == STATE_INITIAL)) { 2240 ifp->if_flags |= IFF_RUNNING; 2241 lcp.Open(sp); 2242 } 2243 2244 sppp_up_event(&lcp, sp); 2245 } 2246 2247 static void 2248 sppp_lcp_down(struct sppp *sp) 2249 { 2250 STDDCL; 2251 2252 KASSERT(SPPP_WLOCKED(sp)); 2253 2254 sppp_down_event(&lcp, sp); 2255 2256 /* 2257 * If this is neither a dial-on-demand nor a passive 2258 * interface, simulate an ``ifconfig down'' action, so the 2259 * administrator can force a redial by another ``ifconfig 2260 * up''. XXX For leased line operation, should we immediately 2261 * try to reopen the connection here? 2262 */ 2263 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2264 if (debug) 2265 log(LOG_INFO, 2266 "%s: Down event (carrier loss), taking interface down.\n", 2267 ifp->if_xname); 2268 SPPP_UNLOCK(sp); 2269 if_down(ifp); 2270 SPPP_LOCK(sp, RW_WRITER); 2271 } else { 2272 if (debug) 2273 log(LOG_DEBUG, 2274 "%s: Down event (carrier loss)\n", 2275 ifp->if_xname); 2276 } 2277 sp->pp_flags &= ~PP_CALLIN; 2278 if (sp->state[IDX_LCP] != STATE_INITIAL) 2279 lcp.Close(sp); 2280 ifp->if_flags &= ~IFF_RUNNING; 2281 } 2282 2283 static void 2284 sppp_lcp_open(struct sppp *sp) 2285 { 2286 2287 KASSERT(SPPP_WLOCKED(sp)); 2288 2289 if (sp->pp_if.if_mtu < PP_MTU) { 2290 sp->lcp.mru = sp->pp_if.if_mtu; 2291 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2292 } else 2293 sp->lcp.mru = PP_MTU; 2294 sp->lcp.their_mru = PP_MTU; 2295 2296 /* 2297 * If we are authenticator, negotiate LCP_AUTH 2298 */ 2299 if (sp->hisauth.proto != 0) 2300 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2301 else 2302 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2303 sp->pp_flags &= ~PP_NEEDAUTH; 2304 sppp_open_event(&lcp, sp); 2305 } 2306 2307 static void 2308 sppp_lcp_close(struct sppp *sp) 2309 { 2310 2311 KASSERT(SPPP_WLOCKED(sp)); 2312 sppp_close_event(&lcp, sp); 2313 } 2314 2315 static void 2316 sppp_lcp_TO(void *cookie) 2317 { 2318 struct sppp *sp = (struct sppp*)cookie; 2319 2320 SPPP_LOCK(sp, RW_WRITER); 2321 sppp_to_event(&lcp, sp); 2322 SPPP_UNLOCK(sp); 2323 } 2324 2325 /* 2326 * Analyze a configure request. Return true if it was agreeable, and 2327 * caused action sca, false if it has been rejected or nak'ed, and 2328 * caused action scn. (The return value is used to make the state 2329 * transition decision in the state automaton.) 2330 */ 2331 static int 2332 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2333 { 2334 STDDCL; 2335 u_char *buf, *r, *p, l, blen; 2336 int origlen, rlen; 2337 uint32_t nmagic; 2338 u_short authproto; 2339 2340 KASSERT(SPPP_WLOCKED(sp)); 2341 2342 len -= 4; 2343 origlen = len; 2344 buf = r = malloc (blen = len, M_TEMP, M_NOWAIT); 2345 if (! buf) 2346 return (0); 2347 2348 if (debug) 2349 log(LOG_DEBUG, "%s: lcp parse opts:", 2350 ifp->if_xname); 2351 2352 /* pass 1: check for things that need to be rejected */ 2353 p = (void *)(h + 1); 2354 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2355 /* Sanity check option length */ 2356 if (l > len) { 2357 /* 2358 * Malicious option - drop immediately. 2359 * XXX Maybe we should just RXJ it? 2360 */ 2361 addlog("%s: received malicious LCP option 0x%02x, " 2362 "length 0x%02x, (len: 0x%02x) dropping.\n", ifp->if_xname, 2363 p[0], l, len); 2364 goto drop; 2365 } 2366 if (debug) 2367 addlog(" %s", sppp_lcp_opt_name(*p)); 2368 switch (*p) { 2369 case LCP_OPT_MAGIC: 2370 /* Magic number. */ 2371 /* fall through, both are same length */ 2372 case LCP_OPT_ASYNC_MAP: 2373 /* Async control character map. */ 2374 if (len >= 6 || l == 6) 2375 continue; 2376 if (debug) 2377 addlog(" [invalid]"); 2378 break; 2379 case LCP_OPT_MRU: 2380 /* Maximum receive unit. */ 2381 if (len >= 4 && l == 4) 2382 continue; 2383 if (debug) 2384 addlog(" [invalid]"); 2385 break; 2386 case LCP_OPT_AUTH_PROTO: 2387 if (len < 4) { 2388 if (debug) 2389 addlog(" [invalid]"); 2390 break; 2391 } 2392 authproto = (p[2] << 8) + p[3]; 2393 if (authproto == PPP_CHAP && l != 5) { 2394 if (debug) 2395 addlog(" [invalid chap len]"); 2396 break; 2397 } 2398 if (sp->myauth.proto == 0) { 2399 /* we are not configured to do auth */ 2400 if (debug) 2401 addlog(" [not configured]"); 2402 break; 2403 } 2404 /* 2405 * Remote want us to authenticate, remember this, 2406 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2407 * up. 2408 */ 2409 sp->pp_flags |= PP_NEEDAUTH; 2410 continue; 2411 default: 2412 /* Others not supported. */ 2413 if (debug) 2414 addlog(" [rej]"); 2415 break; 2416 } 2417 if (rlen + l > blen) { 2418 if (debug) 2419 addlog(" [overflow]"); 2420 continue; 2421 } 2422 /* Add the option to rejected list. */ 2423 memcpy(r, p, l); 2424 r += l; 2425 rlen += l; 2426 } 2427 if (rlen) { 2428 if (debug) 2429 addlog(" send conf-rej\n"); 2430 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2431 goto end; 2432 } else if (debug) 2433 addlog("\n"); 2434 2435 /* 2436 * pass 2: check for option values that are unacceptable and 2437 * thus require to be nak'ed. 2438 */ 2439 if (debug) 2440 log(LOG_DEBUG, "%s: lcp parse opt values: ", 2441 ifp->if_xname); 2442 2443 p = (void *)(h + 1); 2444 len = origlen; 2445 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2446 if (debug) 2447 addlog(" %s", sppp_lcp_opt_name(*p)); 2448 switch (*p) { 2449 case LCP_OPT_MAGIC: 2450 /* Magic number -- extract. */ 2451 nmagic = (uint32_t)p[2] << 24 | 2452 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2453 if (nmagic != sp->lcp.magic) { 2454 if (debug) 2455 addlog(" 0x%x", nmagic); 2456 continue; 2457 } 2458 /* 2459 * Local and remote magics equal -- loopback? 2460 */ 2461 if (sp->pp_loopcnt >= LOOPALIVECNT*5) { 2462 printf ("%s: loopback\n", 2463 ifp->if_xname); 2464 sp->pp_loopcnt = 0; 2465 if (ifp->if_flags & IFF_UP) { 2466 SPPP_UNLOCK(sp); 2467 if_down(ifp); 2468 SPPP_LOCK(sp, RW_WRITER); 2469 2470 IF_PURGE(&sp->pp_cpq); 2471 /* XXX ? */ 2472 lcp.Down(sp); 2473 lcp.Up(sp); 2474 } 2475 } else if (debug) 2476 addlog(" [glitch]"); 2477 ++sp->pp_loopcnt; 2478 /* 2479 * We negate our magic here, and NAK it. If 2480 * we see it later in an NAK packet, we 2481 * suggest a new one. 2482 */ 2483 nmagic = ~sp->lcp.magic; 2484 /* Gonna NAK it. */ 2485 p[2] = nmagic >> 24; 2486 p[3] = nmagic >> 16; 2487 p[4] = nmagic >> 8; 2488 p[5] = nmagic; 2489 break; 2490 2491 case LCP_OPT_ASYNC_MAP: 2492 /* 2493 * Async control character map -- just ignore it. 2494 * 2495 * Quote from RFC 1662, chapter 6: 2496 * To enable this functionality, synchronous PPP 2497 * implementations MUST always respond to the 2498 * Async-Control-Character-Map Configuration 2499 * Option with the LCP Configure-Ack. However, 2500 * acceptance of the Configuration Option does 2501 * not imply that the synchronous implementation 2502 * will do any ACCM mapping. Instead, all such 2503 * octet mapping will be performed by the 2504 * asynchronous-to-synchronous converter. 2505 */ 2506 continue; 2507 2508 case LCP_OPT_MRU: 2509 /* 2510 * Maximum receive unit. Always agreeable, 2511 * but ignored by now. 2512 */ 2513 sp->lcp.their_mru = p[2] * 256 + p[3]; 2514 if (debug) 2515 addlog(" %ld", sp->lcp.their_mru); 2516 continue; 2517 2518 case LCP_OPT_AUTH_PROTO: 2519 authproto = (p[2] << 8) + p[3]; 2520 if (sp->myauth.proto != authproto) { 2521 /* not agreed, nak */ 2522 if (debug) 2523 addlog(" [mine %s != his %s]", 2524 sppp_proto_name(sp->myauth.proto), 2525 sppp_proto_name(authproto)); 2526 p[2] = sp->myauth.proto >> 8; 2527 p[3] = sp->myauth.proto; 2528 break; 2529 } 2530 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2531 if (debug) 2532 addlog(" [chap not MD5]"); 2533 p[4] = CHAP_MD5; 2534 break; 2535 } 2536 continue; 2537 } 2538 if (rlen + l > blen) { 2539 if (debug) 2540 addlog(" [overflow]"); 2541 continue; 2542 } 2543 /* Add the option to nak'ed list. */ 2544 memcpy(r, p, l); 2545 r += l; 2546 rlen += l; 2547 } 2548 if (rlen) { 2549 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2550 if (debug) 2551 addlog(" max_failure (%d) exceeded, " 2552 "send conf-rej\n", 2553 sp->lcp.max_failure); 2554 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2555 } else { 2556 if (debug) 2557 addlog(" send conf-nak\n"); 2558 sppp_cp_send(sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2559 } 2560 goto end; 2561 } else { 2562 if (debug) 2563 addlog(" send conf-ack\n"); 2564 sp->fail_counter[IDX_LCP] = 0; 2565 sp->pp_loopcnt = 0; 2566 sppp_cp_send(sp, PPP_LCP, CONF_ACK, h->ident, origlen, h + 1); 2567 } 2568 2569 end: 2570 free(buf, M_TEMP); 2571 return (rlen == 0); 2572 2573 drop: 2574 free(buf, M_TEMP); 2575 return -1; 2576 } 2577 2578 /* 2579 * Analyze the LCP Configure-Reject option list, and adjust our 2580 * negotiation. 2581 */ 2582 static void 2583 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2584 { 2585 STDDCL; 2586 u_char *buf, *p, l; 2587 2588 KASSERT(SPPP_WLOCKED(sp)); 2589 2590 len -= 4; 2591 buf = malloc (len, M_TEMP, M_NOWAIT); 2592 if (!buf) 2593 return; 2594 2595 if (debug) 2596 log(LOG_DEBUG, "%s: lcp rej opts:", 2597 ifp->if_xname); 2598 2599 p = (void *)(h + 1); 2600 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2601 /* Sanity check option length */ 2602 if (l > len) { 2603 /* 2604 * Malicious option - drop immediately. 2605 * XXX Maybe we should just RXJ it? 2606 */ 2607 addlog("%s: received malicious LCP option, " 2608 "dropping.\n", ifp->if_xname); 2609 goto drop; 2610 } 2611 if (debug) 2612 addlog(" %s", sppp_lcp_opt_name(*p)); 2613 switch (*p) { 2614 case LCP_OPT_MAGIC: 2615 /* Magic number -- can't use it, use 0 */ 2616 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2617 sp->lcp.magic = 0; 2618 break; 2619 case LCP_OPT_MRU: 2620 /* 2621 * We try to negotiate a lower MRU if the underlying 2622 * link's MTU is less than PP_MTU (e.g. PPPoE). If the 2623 * peer rejects this lower rate, fallback to the 2624 * default. 2625 */ 2626 if (debug) { 2627 addlog("%s: warning: peer rejected our MRU of " 2628 "%ld bytes. Defaulting to %d bytes\n", 2629 ifp->if_xname, sp->lcp.mru, PP_MTU); 2630 } 2631 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2632 sp->lcp.mru = PP_MTU; 2633 break; 2634 case LCP_OPT_AUTH_PROTO: 2635 /* 2636 * Peer doesn't want to authenticate himself, 2637 * deny unless this is a dialout call, and 2638 * SPPP_AUTHFLAG_NOCALLOUT is set. 2639 */ 2640 if ((sp->pp_flags & PP_CALLIN) == 0 && 2641 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2642 if (debug) 2643 addlog(" [don't insist on auth " 2644 "for callout]"); 2645 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2646 break; 2647 } 2648 if (debug) 2649 addlog("[access denied]\n"); 2650 lcp.Close(sp); 2651 break; 2652 } 2653 } 2654 if (debug) 2655 addlog("\n"); 2656 drop: 2657 free(buf, M_TEMP); 2658 return; 2659 } 2660 2661 /* 2662 * Analyze the LCP Configure-NAK option list, and adjust our 2663 * negotiation. 2664 */ 2665 static void 2666 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2667 { 2668 STDDCL; 2669 u_char *buf, *p, l, blen; 2670 uint32_t magic; 2671 2672 KASSERT(SPPP_WLOCKED(sp)); 2673 2674 len -= 4; 2675 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 2676 if (!buf) 2677 return; 2678 2679 if (debug) 2680 log(LOG_DEBUG, "%s: lcp nak opts:", 2681 ifp->if_xname); 2682 2683 p = (void *)(h + 1); 2684 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2685 /* Sanity check option length */ 2686 if (l > len) { 2687 /* 2688 * Malicious option - drop immediately. 2689 * XXX Maybe we should just RXJ it? 2690 */ 2691 addlog("%s: received malicious LCP option, " 2692 "dropping.\n", ifp->if_xname); 2693 goto drop; 2694 } 2695 if (debug) 2696 addlog(" %s", sppp_lcp_opt_name(*p)); 2697 switch (*p) { 2698 case LCP_OPT_MAGIC: 2699 /* Magic number -- renegotiate */ 2700 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2701 len >= 6 && l == 6) { 2702 magic = (uint32_t)p[2] << 24 | 2703 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2704 /* 2705 * If the remote magic is our negated one, 2706 * this looks like a loopback problem. 2707 * Suggest a new magic to make sure. 2708 */ 2709 if (magic == ~sp->lcp.magic) { 2710 if (debug) 2711 addlog(" magic glitch"); 2712 sp->lcp.magic = cprng_fast32(); 2713 } else { 2714 sp->lcp.magic = magic; 2715 if (debug) 2716 addlog(" %d", magic); 2717 } 2718 } 2719 break; 2720 case LCP_OPT_MRU: 2721 /* 2722 * Peer wants to advise us to negotiate an MRU. 2723 * Agree on it if it's reasonable, or use 2724 * default otherwise. 2725 */ 2726 if (len >= 4 && l == 4) { 2727 u_int mru = p[2] * 256 + p[3]; 2728 if (debug) 2729 addlog(" %d", mru); 2730 if (mru < PPP_MINMRU || mru > sp->pp_if.if_mtu) 2731 mru = sp->pp_if.if_mtu; 2732 sp->lcp.mru = mru; 2733 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2734 } 2735 break; 2736 case LCP_OPT_AUTH_PROTO: 2737 /* 2738 * Peer doesn't like our authentication method, 2739 * deny. 2740 */ 2741 if (debug) 2742 addlog("[access denied]\n"); 2743 lcp.Close(sp); 2744 break; 2745 } 2746 } 2747 if (debug) 2748 addlog("\n"); 2749 drop: 2750 free(buf, M_TEMP); 2751 return; 2752 } 2753 2754 static void 2755 sppp_lcp_tlu(struct sppp *sp) 2756 { 2757 struct ifnet *ifp = &sp->pp_if; 2758 int i; 2759 uint32_t mask; 2760 2761 KASSERT(SPPP_WLOCKED(sp)); 2762 2763 /* XXX ? */ 2764 if (! (ifp->if_flags & IFF_UP) && 2765 (ifp->if_flags & IFF_RUNNING)) { 2766 /* Coming out of loopback mode. */ 2767 SPPP_UNLOCK(sp); 2768 if_up(ifp); 2769 SPPP_LOCK(sp, RW_WRITER); 2770 } 2771 2772 for (i = 0; i < IDX_COUNT; i++) 2773 if ((cps[i])->flags & CP_QUAL) 2774 (cps[i])->Open(sp); 2775 2776 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2777 (sp->pp_flags & PP_NEEDAUTH) != 0) 2778 sppp_change_phase(sp, SPPP_PHASE_AUTHENTICATE); 2779 else 2780 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 2781 2782 /* 2783 * Open all authentication protocols. This is even required 2784 * if we already proceeded to network phase, since it might be 2785 * that remote wants us to authenticate, so we might have to 2786 * send a PAP request. Undesired authentication protocols 2787 * don't do anything when they get an Open event. 2788 */ 2789 for (i = 0; i < IDX_COUNT; i++) 2790 if ((cps[i])->flags & CP_AUTH) 2791 (cps[i])->Open(sp); 2792 2793 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2794 /* Notify all NCPs. */ 2795 for (i = 0; i < IDX_COUNT; i++) 2796 if ((cps[i])->flags & CP_NCP) 2797 (cps[i])->Open(sp); 2798 } 2799 2800 /* Send Up events to all started protos. */ 2801 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) { 2802 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2803 (cps[i])->Up(sp); 2804 } 2805 } 2806 2807 /* notify low-level driver of state change */ 2808 sppp_notify_chg_wlocked(sp); 2809 2810 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2811 /* if no NCP is starting, close down */ 2812 sppp_lcp_check_and_close(sp); 2813 } 2814 2815 static void 2816 sppp_lcp_tld(struct sppp *sp) 2817 { 2818 int i; 2819 uint32_t mask; 2820 2821 KASSERT(SPPP_WLOCKED(sp)); 2822 2823 sppp_change_phase(sp, SPPP_PHASE_TERMINATE); 2824 2825 /* 2826 * Take upper layers down. We send the Down event first and 2827 * the Close second to prevent the upper layers from sending 2828 * ``a flurry of terminate-request packets'', as the RFC 2829 * describes it. 2830 */ 2831 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) { 2832 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2833 (cps[i])->Down(sp); 2834 (cps[i])->Close(sp); 2835 } 2836 } 2837 } 2838 2839 static void 2840 sppp_lcp_tls(struct sppp *sp) 2841 { 2842 2843 KASSERT(SPPP_WLOCKED(sp)); 2844 2845 2846 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2847 printf("%s: authentication failed %d times, not retrying again\n", 2848 sp->pp_if.if_xname, sp->pp_auth_failures); 2849 2850 SPPP_UNLOCK(sp); 2851 if_down(&sp->pp_if); 2852 SPPP_LOCK(sp, RW_WRITER); 2853 return; 2854 } 2855 2856 sppp_change_phase(sp, SPPP_PHASE_ESTABLISH); 2857 2858 /* Notify lower layer if desired. */ 2859 sppp_notify_tls_wlocked(sp); 2860 } 2861 2862 static void 2863 sppp_lcp_tlf(struct sppp *sp) 2864 { 2865 2866 KASSERT(SPPP_WLOCKED(sp)); 2867 2868 sppp_change_phase(sp, SPPP_PHASE_DEAD); 2869 2870 /* Notify lower layer if desired. */ 2871 sppp_notify_tlf_wlocked(sp); 2872 } 2873 2874 static void 2875 sppp_lcp_scr(struct sppp *sp) 2876 { 2877 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2878 int i = 0; 2879 u_short authproto; 2880 2881 KASSERT(SPPP_WLOCKED(sp)); 2882 2883 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2884 if (! sp->lcp.magic) 2885 sp->lcp.magic = cprng_fast32(); 2886 opt[i++] = LCP_OPT_MAGIC; 2887 opt[i++] = 6; 2888 opt[i++] = sp->lcp.magic >> 24; 2889 opt[i++] = sp->lcp.magic >> 16; 2890 opt[i++] = sp->lcp.magic >> 8; 2891 opt[i++] = sp->lcp.magic; 2892 } 2893 2894 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2895 opt[i++] = LCP_OPT_MRU; 2896 opt[i++] = 4; 2897 opt[i++] = sp->lcp.mru >> 8; 2898 opt[i++] = sp->lcp.mru; 2899 } 2900 2901 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2902 authproto = sp->hisauth.proto; 2903 opt[i++] = LCP_OPT_AUTH_PROTO; 2904 opt[i++] = authproto == PPP_CHAP? 5: 4; 2905 opt[i++] = authproto >> 8; 2906 opt[i++] = authproto; 2907 if (authproto == PPP_CHAP) 2908 opt[i++] = CHAP_MD5; 2909 } 2910 2911 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2912 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2913 } 2914 2915 /* 2916 * Check the open NCPs, return true if at least one NCP is open. 2917 */ 2918 static int 2919 sppp_ncp_check(struct sppp *sp) 2920 { 2921 int i, mask; 2922 2923 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2924 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2925 return 1; 2926 return 0; 2927 } 2928 2929 /* 2930 * Re-check the open NCPs and see if we should terminate the link. 2931 * Called by the NCPs during their tlf action handling. 2932 */ 2933 static void 2934 sppp_lcp_check_and_close(struct sppp *sp) 2935 { 2936 2937 KASSERT(SPPP_WLOCKED(sp)); 2938 2939 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2940 /* don't bother, we are already going down */ 2941 return; 2942 2943 if (sppp_ncp_check(sp)) 2944 return; 2945 lcp.Close(sp); 2946 } 2947 2948 2949 /* 2950 *--------------------------------------------------------------------------* 2951 * * 2952 * The IPCP implementation. * 2953 * * 2954 *--------------------------------------------------------------------------* 2955 */ 2956 2957 static void 2958 sppp_ipcp_init(struct sppp *sp) 2959 { 2960 int error; 2961 2962 KASSERT(SPPP_WLOCKED(sp)); 2963 2964 sp->ipcp.opts = 0; 2965 sp->ipcp.flags = 0; 2966 sp->state[IDX_IPCP] = STATE_INITIAL; 2967 sp->fail_counter[IDX_IPCP] = 0; 2968 sp->pp_seq[IDX_IPCP] = 0; 2969 sp->pp_rseq[IDX_IPCP] = 0; 2970 callout_init(&sp->ch[IDX_IPCP], CALLOUT_MPSAFE); 2971 2972 error = workqueue_create(&sp->ipcp.update_addrs_wq, "ipcp_update_addrs", 2973 sppp_update_ip_addrs_work, sp, PRI_SOFTNET, IPL_NET, 0); 2974 if (error) 2975 panic("%s: update_addrs workqueue_create failed (%d)\n", 2976 __func__, error); 2977 sp->ipcp.update_addrs_q = pcq_create(IPCP_UPDATE_LIMIT, KM_SLEEP); 2978 2979 sp->ipcp.update_addrs_enqueued = 0; 2980 } 2981 2982 static void 2983 sppp_ipcp_up(struct sppp *sp) 2984 { 2985 KASSERT(SPPP_WLOCKED(sp)); 2986 sppp_up_event(&ipcp, sp); 2987 } 2988 2989 static void 2990 sppp_ipcp_down(struct sppp *sp) 2991 { 2992 KASSERT(SPPP_WLOCKED(sp)); 2993 sppp_down_event(&ipcp, sp); 2994 } 2995 2996 static void 2997 sppp_ipcp_open(struct sppp *sp) 2998 { 2999 STDDCL; 3000 uint32_t myaddr, hisaddr; 3001 3002 KASSERT(SPPP_WLOCKED(sp)); 3003 3004 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 3005 sp->ipcp.req_myaddr = 0; 3006 sp->ipcp.req_hisaddr = 0; 3007 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 3008 3009 #ifdef INET 3010 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3011 #else 3012 myaddr = hisaddr = 0; 3013 #endif 3014 /* 3015 * If we don't have his address, this probably means our 3016 * interface doesn't want to talk IP at all. (This could 3017 * be the case if somebody wants to speak only IPX, for 3018 * example.) Don't open IPCP in this case. 3019 */ 3020 if (hisaddr == 0) { 3021 /* XXX this message should go away */ 3022 if (debug) 3023 log(LOG_DEBUG, "%s: ipcp_open(): no IP interface\n", 3024 ifp->if_xname); 3025 return; 3026 } 3027 3028 if (myaddr == 0) { 3029 /* 3030 * I don't have an assigned address, so i need to 3031 * negotiate my address. 3032 */ 3033 sp->ipcp.flags |= IPCP_MYADDR_DYN; 3034 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3035 } 3036 if (hisaddr == 1) { 3037 /* 3038 * XXX - remove this hack! 3039 * remote has no valid address, we need to get one assigned. 3040 */ 3041 sp->ipcp.flags |= IPCP_HISADDR_DYN; 3042 } 3043 sppp_open_event(&ipcp, sp); 3044 } 3045 3046 static void 3047 sppp_ipcp_close(struct sppp *sp) 3048 { 3049 3050 KASSERT(SPPP_WLOCKED(sp)); 3051 3052 sppp_close_event(&ipcp, sp); 3053 3054 #ifdef INET 3055 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 3056 /* 3057 * Some address was dynamic, clear it again. 3058 */ 3059 sppp_clear_ip_addrs(sp); 3060 #endif 3061 } 3062 3063 static void 3064 sppp_ipcp_TO(void *cookie) 3065 { 3066 struct sppp *sp = cookie; 3067 3068 SPPP_LOCK(sp, RW_WRITER); 3069 sppp_to_event(&ipcp, sp); 3070 SPPP_UNLOCK(sp); 3071 } 3072 3073 /* 3074 * Analyze a configure request. Return true if it was agreeable, and 3075 * caused action sca, false if it has been rejected or nak'ed, and 3076 * caused action scn. (The return value is used to make the state 3077 * transition decision in the state automaton.) 3078 */ 3079 static int 3080 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3081 { 3082 u_char *buf, *r, *p, l, blen; 3083 struct ifnet *ifp = &sp->pp_if; 3084 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3085 uint32_t hisaddr, desiredaddr; 3086 3087 KASSERT(SPPP_WLOCKED(sp)); 3088 3089 len -= 4; 3090 origlen = len; 3091 /* 3092 * Make sure to allocate a buf that can at least hold a 3093 * conf-nak with an `address' option. We might need it below. 3094 */ 3095 blen = len < 6 ? 6 : len; 3096 buf = r = malloc (blen, M_TEMP, M_NOWAIT); 3097 if (! buf) 3098 return (0); 3099 3100 /* pass 1: see if we can recognize them */ 3101 if (debug) 3102 log(LOG_DEBUG, "%s: ipcp parse opts:", 3103 ifp->if_xname); 3104 p = (void *)(h + 1); 3105 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3106 /* Sanity check option length */ 3107 if (l > len) { 3108 /* XXX should we just RXJ? */ 3109 addlog("%s: malicious IPCP option received, dropping\n", 3110 ifp->if_xname); 3111 goto drop; 3112 } 3113 if (debug) 3114 addlog(" %s", sppp_ipcp_opt_name(*p)); 3115 switch (*p) { 3116 #ifdef notyet 3117 case IPCP_OPT_COMPRESSION: 3118 if (len >= 6 && l >= 6) { 3119 /* correctly formed compress option */ 3120 continue; 3121 } 3122 if (debug) 3123 addlog(" [invalid]"); 3124 break; 3125 #endif 3126 case IPCP_OPT_ADDRESS: 3127 if (len >= 6 && l == 6) { 3128 /* correctly formed address option */ 3129 continue; 3130 } 3131 if (debug) 3132 addlog(" [invalid]"); 3133 break; 3134 default: 3135 /* Others not supported. */ 3136 if (debug) 3137 addlog(" [rej]"); 3138 break; 3139 } 3140 /* Add the option to rejected list. */ 3141 if (rlen + l > blen) { 3142 if (debug) 3143 addlog(" [overflow]"); 3144 continue; 3145 } 3146 memcpy(r, p, l); 3147 r += l; 3148 rlen += l; 3149 } 3150 if (rlen) { 3151 if (debug) 3152 addlog(" send conf-rej\n"); 3153 sppp_cp_send(sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 3154 goto end; 3155 } else if (debug) 3156 addlog("\n"); 3157 3158 /* pass 2: parse option values */ 3159 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 3160 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 3161 else 3162 #ifdef INET 3163 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 3164 #else 3165 hisaddr = 0; 3166 #endif 3167 if (debug) 3168 log(LOG_DEBUG, "%s: ipcp parse opt values: ", 3169 ifp->if_xname); 3170 p = (void *)(h + 1); 3171 len = origlen; 3172 for (rlen=0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3173 if (debug) 3174 addlog(" %s", sppp_ipcp_opt_name(*p)); 3175 switch (*p) { 3176 #ifdef notyet 3177 case IPCP_OPT_COMPRESSION: 3178 continue; 3179 #endif 3180 case IPCP_OPT_ADDRESS: 3181 desiredaddr = p[2] << 24 | p[3] << 16 | 3182 p[4] << 8 | p[5]; 3183 if (desiredaddr == hisaddr || 3184 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 3185 /* 3186 * Peer's address is same as our value, 3187 * this is agreeable. Gonna conf-ack 3188 * it. 3189 */ 3190 if (debug) 3191 addlog(" %s [ack]", 3192 sppp_dotted_quad(hisaddr)); 3193 /* record that we've seen it already */ 3194 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 3195 sp->ipcp.req_hisaddr = desiredaddr; 3196 hisaddr = desiredaddr; 3197 continue; 3198 } 3199 /* 3200 * The address wasn't agreeable. This is either 3201 * he sent us 0.0.0.0, asking to assign him an 3202 * address, or he send us another address not 3203 * matching our value. Either case, we gonna 3204 * conf-nak it with our value. 3205 */ 3206 if (debug) { 3207 if (desiredaddr == 0) 3208 addlog(" [addr requested]"); 3209 else 3210 addlog(" %s [not agreed]", 3211 sppp_dotted_quad(desiredaddr)); 3212 } 3213 3214 p[2] = hisaddr >> 24; 3215 p[3] = hisaddr >> 16; 3216 p[4] = hisaddr >> 8; 3217 p[5] = hisaddr; 3218 break; 3219 } 3220 if (rlen + l > blen) { 3221 if (debug) 3222 addlog(" [overflow]"); 3223 continue; 3224 } 3225 /* Add the option to nak'ed list. */ 3226 memcpy(r, p, l); 3227 r += l; 3228 rlen += l; 3229 } 3230 3231 /* 3232 * If we are about to conf-ack the request, but haven't seen 3233 * his address so far, gonna conf-nak it instead, with the 3234 * `address' option present and our idea of his address being 3235 * filled in there, to request negotiation of both addresses. 3236 * 3237 * XXX This can result in an endless req - nak loop if peer 3238 * doesn't want to send us his address. Q: What should we do 3239 * about it? XXX A: implement the max-failure counter. 3240 */ 3241 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 3242 buf[0] = IPCP_OPT_ADDRESS; 3243 buf[1] = 6; 3244 buf[2] = hisaddr >> 24; 3245 buf[3] = hisaddr >> 16; 3246 buf[4] = hisaddr >> 8; 3247 buf[5] = hisaddr; 3248 rlen = 6; 3249 if (debug) 3250 addlog(" still need hisaddr"); 3251 } 3252 3253 if (rlen) { 3254 if (debug) 3255 addlog(" send conf-nak\n"); 3256 sppp_cp_send(sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 3257 } else { 3258 if (debug) 3259 addlog(" send conf-ack\n"); 3260 sppp_cp_send(sp, PPP_IPCP, CONF_ACK, h->ident, origlen, h + 1); 3261 } 3262 3263 end: 3264 free(buf, M_TEMP); 3265 return (rlen == 0); 3266 3267 drop: 3268 free(buf, M_TEMP); 3269 return -1; 3270 } 3271 3272 /* 3273 * Analyze the IPCP Configure-Reject option list, and adjust our 3274 * negotiation. 3275 */ 3276 static void 3277 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3278 { 3279 u_char *buf, *p, l, blen; 3280 struct ifnet *ifp = &sp->pp_if; 3281 int debug = ifp->if_flags & IFF_DEBUG; 3282 3283 KASSERT(SPPP_WLOCKED(sp)); 3284 3285 len -= 4; 3286 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 3287 if (!buf) 3288 return; 3289 3290 if (debug) 3291 log(LOG_DEBUG, "%s: ipcp rej opts:", 3292 ifp->if_xname); 3293 3294 p = (void *)(h + 1); 3295 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3296 /* Sanity check option length */ 3297 if (l > len) { 3298 /* XXX should we just RXJ? */ 3299 addlog("%s: malicious IPCP option received, dropping\n", 3300 ifp->if_xname); 3301 goto drop; 3302 } 3303 if (debug) 3304 addlog(" %s", sppp_ipcp_opt_name(*p)); 3305 switch (*p) { 3306 case IPCP_OPT_ADDRESS: 3307 /* 3308 * Peer doesn't grok address option. This is 3309 * bad. XXX Should we better give up here? 3310 */ 3311 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 3312 break; 3313 #ifdef notyet 3314 case IPCP_OPT_COMPRESS: 3315 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 3316 break; 3317 #endif 3318 } 3319 } 3320 if (debug) 3321 addlog("\n"); 3322 drop: 3323 free(buf, M_TEMP); 3324 return; 3325 } 3326 3327 /* 3328 * Analyze the IPCP Configure-NAK option list, and adjust our 3329 * negotiation. 3330 */ 3331 static void 3332 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3333 { 3334 u_char *p, l; 3335 struct ifnet *ifp = &sp->pp_if; 3336 int debug = ifp->if_flags & IFF_DEBUG; 3337 uint32_t wantaddr; 3338 3339 KASSERT(SPPP_WLOCKED(sp)); 3340 3341 len -= 4; 3342 3343 if (debug) 3344 log(LOG_DEBUG, "%s: ipcp nak opts:", 3345 ifp->if_xname); 3346 3347 p = (void *)(h + 1); 3348 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3349 /* Sanity check option length */ 3350 if (l > len) { 3351 /* XXX should we just RXJ? */ 3352 addlog("%s: malicious IPCP option received, dropping\n", 3353 ifp->if_xname); 3354 return; 3355 } 3356 if (debug) 3357 addlog(" %s", sppp_ipcp_opt_name(*p)); 3358 switch (*p) { 3359 case IPCP_OPT_ADDRESS: 3360 /* 3361 * Peer doesn't like our local IP address. See 3362 * if we can do something for him. We'll drop 3363 * him our address then. 3364 */ 3365 if (len >= 6 && l == 6) { 3366 wantaddr = p[2] << 24 | p[3] << 16 | 3367 p[4] << 8 | p[5]; 3368 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3369 if (debug) 3370 addlog(" [wantaddr %s]", 3371 sppp_dotted_quad(wantaddr)); 3372 /* 3373 * When doing dynamic address assignment, 3374 * we accept his offer. Otherwise, we 3375 * ignore it and thus continue to negotiate 3376 * our already existing value. 3377 */ 3378 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3379 if (debug) 3380 addlog(" [agree]"); 3381 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3382 sp->ipcp.req_myaddr = wantaddr; 3383 } 3384 } 3385 break; 3386 3387 case IPCP_OPT_PRIMDNS: 3388 if (len >= 6 && l == 6) { 3389 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3390 p[4] << 8 | p[5]; 3391 } 3392 break; 3393 3394 case IPCP_OPT_SECDNS: 3395 if (len >= 6 && l == 6) { 3396 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3397 p[4] << 8 | p[5]; 3398 } 3399 break; 3400 #ifdef notyet 3401 case IPCP_OPT_COMPRESS: 3402 /* 3403 * Peer wants different compression parameters. 3404 */ 3405 break; 3406 #endif 3407 } 3408 } 3409 if (debug) 3410 addlog("\n"); 3411 } 3412 3413 static void 3414 sppp_ipcp_tlu(struct sppp *sp) 3415 { 3416 #ifdef INET 3417 KASSERT(SPPP_WLOCKED(sp)); 3418 /* we are up. Set addresses and notify anyone interested */ 3419 sppp_set_ip_addrs(sp); 3420 #endif 3421 } 3422 3423 static void 3424 sppp_ipcp_tld(struct sppp *sp) 3425 { 3426 3427 KASSERT(SPPP_WLOCKED(sp)); 3428 } 3429 3430 static void 3431 sppp_ipcp_tls(struct sppp *sp) 3432 { 3433 3434 KASSERT(SPPP_WLOCKED(sp)); 3435 /* indicate to LCP that it must stay alive */ 3436 sp->lcp.protos |= (1 << IDX_IPCP); 3437 } 3438 3439 static void 3440 sppp_ipcp_tlf(struct sppp *sp) 3441 { 3442 3443 KASSERT(SPPP_WLOCKED(sp)); 3444 3445 /* we no longer need LCP */ 3446 sp->lcp.protos &= ~(1 << IDX_IPCP); 3447 } 3448 3449 static void 3450 sppp_ipcp_scr(struct sppp *sp) 3451 { 3452 uint8_t opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3453 #ifdef INET 3454 uint32_t ouraddr; 3455 #endif 3456 int i = 0; 3457 3458 KASSERT(SPPP_WLOCKED(sp)); 3459 3460 #ifdef notyet 3461 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3462 opt[i++] = IPCP_OPT_COMPRESSION; 3463 opt[i++] = 6; 3464 opt[i++] = 0; /* VJ header compression */ 3465 opt[i++] = 0x2d; /* VJ header compression */ 3466 opt[i++] = max_slot_id; 3467 opt[i++] = comp_slot_id; 3468 } 3469 #endif 3470 3471 #ifdef INET 3472 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3473 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3474 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3475 else 3476 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3477 opt[i++] = IPCP_OPT_ADDRESS; 3478 opt[i++] = 6; 3479 opt[i++] = ouraddr >> 24; 3480 opt[i++] = ouraddr >> 16; 3481 opt[i++] = ouraddr >> 8; 3482 opt[i++] = ouraddr; 3483 } 3484 #endif 3485 3486 if (sp->query_dns & 1) { 3487 opt[i++] = IPCP_OPT_PRIMDNS; 3488 opt[i++] = 6; 3489 opt[i++] = sp->dns_addrs[0] >> 24; 3490 opt[i++] = sp->dns_addrs[0] >> 16; 3491 opt[i++] = sp->dns_addrs[0] >> 8; 3492 opt[i++] = sp->dns_addrs[0]; 3493 } 3494 if (sp->query_dns & 2) { 3495 opt[i++] = IPCP_OPT_SECDNS; 3496 opt[i++] = 6; 3497 opt[i++] = sp->dns_addrs[1] >> 24; 3498 opt[i++] = sp->dns_addrs[1] >> 16; 3499 opt[i++] = sp->dns_addrs[1] >> 8; 3500 opt[i++] = sp->dns_addrs[1]; 3501 } 3502 3503 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3504 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3505 } 3506 3507 3508 /* 3509 *--------------------------------------------------------------------------* 3510 * * 3511 * The IPv6CP implementation. * 3512 * * 3513 *--------------------------------------------------------------------------* 3514 */ 3515 3516 #ifdef INET6 3517 static void 3518 sppp_ipv6cp_init(struct sppp *sp) 3519 { 3520 3521 KASSERT(SPPP_WLOCKED(sp)); 3522 3523 sp->ipv6cp.opts = 0; 3524 sp->ipv6cp.flags = 0; 3525 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3526 sp->fail_counter[IDX_IPV6CP] = 0; 3527 sp->pp_seq[IDX_IPV6CP] = 0; 3528 sp->pp_rseq[IDX_IPV6CP] = 0; 3529 callout_init(&sp->ch[IDX_IPV6CP], CALLOUT_MPSAFE); 3530 } 3531 3532 static void 3533 sppp_ipv6cp_up(struct sppp *sp) 3534 { 3535 3536 KASSERT(SPPP_WLOCKED(sp)); 3537 sppp_up_event(&ipv6cp, sp); 3538 } 3539 3540 static void 3541 sppp_ipv6cp_down(struct sppp *sp) 3542 { 3543 3544 KASSERT(SPPP_WLOCKED(sp)); 3545 sppp_down_event(&ipv6cp, sp); 3546 } 3547 3548 static void 3549 sppp_ipv6cp_open(struct sppp *sp) 3550 { 3551 STDDCL; 3552 struct in6_addr myaddr, hisaddr; 3553 3554 KASSERT(SPPP_WLOCKED(sp)); 3555 3556 #ifdef IPV6CP_MYIFID_DYN 3557 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3558 #else 3559 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3560 #endif 3561 3562 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3563 /* 3564 * If we don't have our address, this probably means our 3565 * interface doesn't want to talk IPv6 at all. (This could 3566 * be the case if somebody wants to speak only IPX, for 3567 * example.) Don't open IPv6CP in this case. 3568 */ 3569 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3570 /* XXX this message should go away */ 3571 if (debug) 3572 log(LOG_DEBUG, "%s: ipv6cp_open(): no IPv6 interface\n", 3573 ifp->if_xname); 3574 return; 3575 } 3576 3577 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3578 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3579 sppp_open_event(&ipv6cp, sp); 3580 } 3581 3582 static void 3583 sppp_ipv6cp_close(struct sppp *sp) 3584 { 3585 3586 KASSERT(SPPP_WLOCKED(sp)); 3587 sppp_close_event(&ipv6cp, sp); 3588 } 3589 3590 static void 3591 sppp_ipv6cp_TO(void *cookie) 3592 { 3593 struct sppp *sp = cookie; 3594 3595 SPPP_LOCK(sp, RW_WRITER); 3596 sppp_to_event(&ipv6cp, sp); 3597 SPPP_UNLOCK(sp); 3598 } 3599 3600 /* 3601 * Analyze a configure request. Return true if it was agreeable, and 3602 * caused action sca, false if it has been rejected or nak'ed, and 3603 * caused action scn. (The return value is used to make the state 3604 * transition decision in the state automaton.) 3605 */ 3606 static int 3607 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3608 { 3609 u_char *buf, *r, *p, l, blen; 3610 struct ifnet *ifp = &sp->pp_if; 3611 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3612 struct in6_addr myaddr, desiredaddr, suggestaddr; 3613 int ifidcount; 3614 int type; 3615 int collision, nohisaddr; 3616 char ip6buf[INET6_ADDRSTRLEN]; 3617 3618 KASSERT(SPPP_WLOCKED(sp)); 3619 3620 len -= 4; 3621 origlen = len; 3622 /* 3623 * Make sure to allocate a buf that can at least hold a 3624 * conf-nak with an `address' option. We might need it below. 3625 */ 3626 blen = len < 6 ? 6 : len; 3627 buf = r = malloc (blen, M_TEMP, M_NOWAIT); 3628 if (! buf) 3629 return (0); 3630 3631 /* pass 1: see if we can recognize them */ 3632 if (debug) 3633 log(LOG_DEBUG, "%s: ipv6cp parse opts:", 3634 ifp->if_xname); 3635 p = (void *)(h + 1); 3636 ifidcount = 0; 3637 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3638 /* Sanity check option length */ 3639 if (l > len) { 3640 /* XXX just RXJ? */ 3641 addlog("%s: received malicious IPCPv6 option, " 3642 "dropping\n", ifp->if_xname); 3643 goto drop; 3644 } 3645 if (debug) 3646 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3647 switch (*p) { 3648 case IPV6CP_OPT_IFID: 3649 if (len >= 10 && l == 10 && ifidcount == 0) { 3650 /* correctly formed address option */ 3651 ifidcount++; 3652 continue; 3653 } 3654 if (debug) 3655 addlog(" [invalid]"); 3656 break; 3657 #ifdef notyet 3658 case IPV6CP_OPT_COMPRESSION: 3659 if (len >= 4 && l >= 4) { 3660 /* correctly formed compress option */ 3661 continue; 3662 } 3663 if (debug) 3664 addlog(" [invalid]"); 3665 break; 3666 #endif 3667 default: 3668 /* Others not supported. */ 3669 if (debug) 3670 addlog(" [rej]"); 3671 break; 3672 } 3673 if (rlen + l > blen) { 3674 if (debug) 3675 addlog(" [overflow]"); 3676 continue; 3677 } 3678 /* Add the option to rejected list. */ 3679 memcpy(r, p, l); 3680 r += l; 3681 rlen += l; 3682 } 3683 if (rlen) { 3684 if (debug) 3685 addlog(" send conf-rej\n"); 3686 sppp_cp_send(sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3687 goto end; 3688 } else if (debug) 3689 addlog("\n"); 3690 3691 /* pass 2: parse option values */ 3692 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3693 if (debug) 3694 log(LOG_DEBUG, "%s: ipv6cp parse opt values: ", 3695 ifp->if_xname); 3696 p = (void *)(h + 1); 3697 len = origlen; 3698 type = CONF_ACK; 3699 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3700 if (debug) 3701 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3702 switch (*p) { 3703 #ifdef notyet 3704 case IPV6CP_OPT_COMPRESSION: 3705 continue; 3706 #endif 3707 case IPV6CP_OPT_IFID: 3708 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3709 memcpy(&desiredaddr.s6_addr[8], &p[2], 8); 3710 collision = (memcmp(&desiredaddr.s6_addr[8], 3711 &myaddr.s6_addr[8], 8) == 0); 3712 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3713 3714 desiredaddr.s6_addr16[0] = htons(0xfe80); 3715 (void)in6_setscope(&desiredaddr, &sp->pp_if, NULL); 3716 3717 if (!collision && !nohisaddr) { 3718 /* no collision, hisaddr known - Conf-Ack */ 3719 type = CONF_ACK; 3720 3721 if (debug) { 3722 addlog(" %s [%s]", 3723 IN6_PRINT(ip6buf, &desiredaddr), 3724 sppp_cp_type_name(type)); 3725 } 3726 continue; 3727 } 3728 3729 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3730 if (collision && nohisaddr) { 3731 /* collision, hisaddr unknown - Conf-Rej */ 3732 type = CONF_REJ; 3733 memset(&p[2], 0, 8); 3734 } else { 3735 /* 3736 * - no collision, hisaddr unknown, or 3737 * - collision, hisaddr known 3738 * Conf-Nak, suggest hisaddr 3739 */ 3740 type = CONF_NAK; 3741 sppp_suggest_ip6_addr(sp, &suggestaddr); 3742 memcpy(&p[2], &suggestaddr.s6_addr[8], 8); 3743 } 3744 if (debug) 3745 addlog(" %s [%s]", IN6_PRINT(ip6buf, &desiredaddr), 3746 sppp_cp_type_name(type)); 3747 break; 3748 } 3749 if (rlen + l > blen) { 3750 if (debug) 3751 addlog(" [overflow]"); 3752 continue; 3753 } 3754 /* Add the option to nak'ed list. */ 3755 memcpy(r, p, l); 3756 r += l; 3757 rlen += l; 3758 } 3759 3760 if (rlen == 0 && type == CONF_ACK) { 3761 if (debug) 3762 addlog(" send %s\n", sppp_cp_type_name(type)); 3763 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, origlen, h + 1); 3764 } else { 3765 #ifdef notdef 3766 if (type == CONF_ACK) 3767 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3768 #endif 3769 3770 if (debug) { 3771 addlog(" send %s suggest %s\n", 3772 sppp_cp_type_name(type), IN6_PRINT(ip6buf, &suggestaddr)); 3773 } 3774 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3775 } 3776 3777 end: 3778 free(buf, M_TEMP); 3779 return (rlen == 0); 3780 3781 drop: 3782 free(buf, M_TEMP); 3783 return -1; 3784 } 3785 3786 /* 3787 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3788 * negotiation. 3789 */ 3790 static void 3791 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3792 { 3793 u_char *buf, *p, l, blen; 3794 struct ifnet *ifp = &sp->pp_if; 3795 int debug = ifp->if_flags & IFF_DEBUG; 3796 3797 KASSERT(SPPP_WLOCKED(sp)); 3798 3799 len -= 4; 3800 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 3801 if (!buf) 3802 return; 3803 3804 if (debug) 3805 log(LOG_DEBUG, "%s: ipv6cp rej opts:", 3806 ifp->if_xname); 3807 3808 p = (void *)(h + 1); 3809 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3810 if (l > len) { 3811 /* XXX just RXJ? */ 3812 addlog("%s: received malicious IPCPv6 option, " 3813 "dropping\n", ifp->if_xname); 3814 goto drop; 3815 } 3816 if (debug) 3817 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3818 switch (*p) { 3819 case IPV6CP_OPT_IFID: 3820 /* 3821 * Peer doesn't grok address option. This is 3822 * bad. XXX Should we better give up here? 3823 */ 3824 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3825 break; 3826 #ifdef notyet 3827 case IPV6CP_OPT_COMPRESS: 3828 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3829 break; 3830 #endif 3831 } 3832 } 3833 if (debug) 3834 addlog("\n"); 3835 drop: 3836 free(buf, M_TEMP); 3837 return; 3838 } 3839 3840 /* 3841 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3842 * negotiation. 3843 */ 3844 static void 3845 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3846 { 3847 u_char *buf, *p, l, blen; 3848 struct ifnet *ifp = &sp->pp_if; 3849 int debug = ifp->if_flags & IFF_DEBUG; 3850 struct in6_addr suggestaddr; 3851 char ip6buf[INET6_ADDRSTRLEN]; 3852 3853 KASSERT(SPPP_WLOCKED(sp)); 3854 3855 len -= 4; 3856 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 3857 if (!buf) 3858 return; 3859 3860 if (debug) 3861 log(LOG_DEBUG, "%s: ipv6cp nak opts:", 3862 ifp->if_xname); 3863 3864 p = (void *)(h + 1); 3865 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3866 if (l > len) { 3867 /* XXX just RXJ? */ 3868 addlog("%s: received malicious IPCPv6 option, " 3869 "dropping\n", ifp->if_xname); 3870 goto drop; 3871 } 3872 if (debug) 3873 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3874 switch (*p) { 3875 case IPV6CP_OPT_IFID: 3876 /* 3877 * Peer doesn't like our local ifid. See 3878 * if we can do something for him. We'll drop 3879 * him our address then. 3880 */ 3881 if (len < 10 || l != 10) 3882 break; 3883 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3884 suggestaddr.s6_addr16[0] = htons(0xfe80); 3885 (void)in6_setscope(&suggestaddr, &sp->pp_if, NULL); 3886 memcpy(&suggestaddr.s6_addr[8], &p[2], 8); 3887 3888 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3889 if (debug) 3890 addlog(" [suggestaddr %s]", 3891 IN6_PRINT(ip6buf, &suggestaddr)); 3892 #ifdef IPV6CP_MYIFID_DYN 3893 /* 3894 * When doing dynamic address assignment, 3895 * we accept his offer. 3896 */ 3897 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3898 struct in6_addr lastsuggest; 3899 /* 3900 * If <suggested myaddr from peer> equals to 3901 * <hisaddr we have suggested last time>, 3902 * we have a collision. generate new random 3903 * ifid. 3904 */ 3905 sppp_suggest_ip6_addr(&lastsuggest); 3906 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3907 lastsuggest)) { 3908 if (debug) 3909 addlog(" [random]"); 3910 sppp_gen_ip6_addr(sp, &suggestaddr); 3911 } 3912 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3913 if (debug) 3914 addlog(" [agree]"); 3915 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3916 } 3917 #else 3918 /* 3919 * Since we do not do dynamic address assignment, 3920 * we ignore it and thus continue to negotiate 3921 * our already existing value. This can possibly 3922 * go into infinite request-reject loop. 3923 * 3924 * This is not likely because we normally use 3925 * ifid based on MAC-address. 3926 * If you have no ethernet card on the node, too bad. 3927 * XXX should we use fail_counter? 3928 */ 3929 #endif 3930 break; 3931 #ifdef notyet 3932 case IPV6CP_OPT_COMPRESS: 3933 /* 3934 * Peer wants different compression parameters. 3935 */ 3936 break; 3937 #endif 3938 } 3939 } 3940 if (debug) 3941 addlog("\n"); 3942 drop: 3943 free(buf, M_TEMP); 3944 return; 3945 } 3946 3947 static void 3948 sppp_ipv6cp_tlu(struct sppp *sp) 3949 { 3950 3951 KASSERT(SPPP_WLOCKED(sp)); 3952 /* we are up - notify isdn daemon */ 3953 sppp_notify_con_wlocked(sp); 3954 } 3955 3956 static void 3957 sppp_ipv6cp_tld(struct sppp *sp) 3958 { 3959 3960 KASSERT(SPPP_WLOCKED(sp)); 3961 } 3962 3963 static void 3964 sppp_ipv6cp_tls(struct sppp *sp) 3965 { 3966 3967 KASSERT(SPPP_WLOCKED(sp)); 3968 /* indicate to LCP that it must stay alive */ 3969 sp->lcp.protos |= (1 << IDX_IPV6CP); 3970 } 3971 3972 static void 3973 sppp_ipv6cp_tlf(struct sppp *sp) 3974 { 3975 3976 KASSERT(SPPP_WLOCKED(sp)); 3977 /* we no longer need LCP */ 3978 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3979 } 3980 3981 static void 3982 sppp_ipv6cp_scr(struct sppp *sp) 3983 { 3984 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3985 struct in6_addr ouraddr; 3986 int i = 0; 3987 3988 KASSERT(SPPP_WLOCKED(sp)); 3989 3990 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3991 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3992 opt[i++] = IPV6CP_OPT_IFID; 3993 opt[i++] = 10; 3994 memcpy(&opt[i], &ouraddr.s6_addr[8], 8); 3995 i += 8; 3996 } 3997 3998 #ifdef notyet 3999 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 4000 opt[i++] = IPV6CP_OPT_COMPRESSION; 4001 opt[i++] = 4; 4002 opt[i++] = 0; /* TBD */ 4003 opt[i++] = 0; /* TBD */ 4004 /* variable length data may follow */ 4005 } 4006 #endif 4007 4008 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 4009 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 4010 } 4011 #else /*INET6*/ 4012 static void 4013 sppp_ipv6cp_init(struct sppp *sp) 4014 { 4015 4016 KASSERT(SPPP_WLOCKED(sp)); 4017 } 4018 4019 static void 4020 sppp_ipv6cp_up(struct sppp *sp) 4021 { 4022 4023 KASSERT(SPPP_WLOCKED(sp)); 4024 } 4025 4026 static void 4027 sppp_ipv6cp_down(struct sppp *sp) 4028 { 4029 4030 KASSERT(SPPP_WLOCKED(sp)); 4031 } 4032 4033 static void 4034 sppp_ipv6cp_open(struct sppp *sp) 4035 { 4036 4037 KASSERT(SPPP_WLOCKED(sp)); 4038 } 4039 4040 static void 4041 sppp_ipv6cp_close(struct sppp *sp) 4042 { 4043 4044 KASSERT(SPPP_WLOCKED(sp)); 4045 } 4046 4047 static void 4048 sppp_ipv6cp_TO(void *cookie) 4049 { 4050 struct sppp *sp __diagused = cookie; 4051 4052 KASSERT(SPPP_WLOCKED(sp)); 4053 } 4054 4055 static int 4056 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, 4057 int len) 4058 { 4059 4060 KASSERT(SPPP_WLOCKED(sp)); 4061 return 0; 4062 } 4063 4064 static void 4065 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, 4066 int len) 4067 { 4068 4069 KASSERT(SPPP_WLOCKED(sp)); 4070 } 4071 4072 static void 4073 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, 4074 int len) 4075 { 4076 4077 KASSERT(SPPP_WLOCKED(sp)); 4078 } 4079 4080 static void 4081 sppp_ipv6cp_tlu(struct sppp *sp) 4082 { 4083 4084 KASSERT(SPPP_WLOCKED(sp)); 4085 } 4086 4087 static void 4088 sppp_ipv6cp_tld(struct sppp *sp) 4089 { 4090 4091 KASSERT(SPPP_WLOCKED(sp)); 4092 } 4093 4094 static void 4095 sppp_ipv6cp_tls(struct sppp *sp) 4096 { 4097 4098 KASSERT(SPPP_WLOCKED(sp)); 4099 } 4100 4101 static void 4102 sppp_ipv6cp_tlf(struct sppp *sp) 4103 { 4104 4105 KASSERT(SPPP_WLOCKED(sp)); 4106 } 4107 4108 static void 4109 sppp_ipv6cp_scr(struct sppp *sp) 4110 { 4111 4112 KASSERT(SPPP_WLOCKED(sp)); 4113 } 4114 #endif /*INET6*/ 4115 4116 4117 /* 4118 *--------------------------------------------------------------------------* 4119 * * 4120 * The CHAP implementation. * 4121 * * 4122 *--------------------------------------------------------------------------* 4123 */ 4124 4125 /* 4126 * The authentication protocols don't employ a full-fledged state machine as 4127 * the control protocols do, since they do have Open and Close events, but 4128 * not Up and Down, nor are they explicitly terminated. Also, use of the 4129 * authentication protocols may be different in both directions (this makes 4130 * sense, think of a machine that never accepts incoming calls but only 4131 * calls out, it doesn't require the called party to authenticate itself). 4132 * 4133 * Our state machine for the local authentication protocol (we are requesting 4134 * the peer to authenticate) looks like: 4135 * 4136 * RCA- 4137 * +--------------------------------------------+ 4138 * V scn,tld| 4139 * +--------+ Close +---------+ RCA+ 4140 * | |<----------------------------------| |------+ 4141 * +--->| Closed | TO* | Opened | sca | 4142 * | | |-----+ +-------| |<-----+ 4143 * | +--------+ irc | | +---------+ 4144 * | ^ | | ^ 4145 * | | | | | 4146 * | | | | | 4147 * | TO-| | | | 4148 * | |tld TO+ V | | 4149 * | | +------->+ | | 4150 * | | | | | | 4151 * | +--------+ V | | 4152 * | | |<----+<--------------------+ | 4153 * | | Req- | scr | 4154 * | | Sent | | 4155 * | | | | 4156 * | +--------+ | 4157 * | RCA- | | RCA+ | 4158 * +------+ +------------------------------------------+ 4159 * scn,tld sca,irc,ict,tlu 4160 * 4161 * 4162 * with: 4163 * 4164 * Open: LCP reached authentication phase 4165 * Close: LCP reached terminate phase 4166 * 4167 * RCA+: received reply (pap-req, chap-response), acceptable 4168 * RCN: received reply (pap-req, chap-response), not acceptable 4169 * TO+: timeout with restart counter >= 0 4170 * TO-: timeout with restart counter < 0 4171 * TO*: reschedule timeout for CHAP 4172 * 4173 * scr: send request packet (none for PAP, chap-challenge) 4174 * sca: send ack packet (pap-ack, chap-success) 4175 * scn: send nak packet (pap-nak, chap-failure) 4176 * ict: initialize re-challenge timer (CHAP only) 4177 * 4178 * tlu: this-layer-up, LCP reaches network phase 4179 * tld: this-layer-down, LCP enters terminate phase 4180 * 4181 * Note that in CHAP mode, after sending a new challenge, while the state 4182 * automaton falls back into Req-Sent state, it doesn't signal a tld 4183 * event to LCP, so LCP remains in network phase. Only after not getting 4184 * any response (or after getting an unacceptable response), CHAP closes, 4185 * causing LCP to enter terminate phase. 4186 * 4187 * With PAP, there is no initial request that can be sent. The peer is 4188 * expected to send one based on the successful negotiation of PAP as 4189 * the authentication protocol during the LCP option negotiation. 4190 * 4191 * Incoming authentication protocol requests (remote requests 4192 * authentication, we are peer) don't employ a state machine at all, 4193 * they are simply answered. Some peers [Ascend P50 firmware rev 4194 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 4195 * still in authentication phase (thereby violating the standard that 4196 * demands that these NCP packets are to be discarded), so we keep 4197 * track of the peer demanding us to authenticate, and only proceed to 4198 * phase network once we've seen a positive acknowledge for the 4199 * authentication. 4200 */ 4201 4202 /* 4203 * Handle incoming CHAP packets. 4204 */ 4205 void 4206 sppp_chap_input(struct sppp *sp, struct mbuf *m) 4207 { 4208 STDDCL; 4209 struct lcp_header *h; 4210 int len, x; 4211 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 4212 int value_len, name_len; 4213 MD5_CTX ctx; 4214 4215 len = m->m_pkthdr.len; 4216 if (len < 4) { 4217 if (debug) 4218 log(LOG_DEBUG, 4219 "%s: chap invalid packet length: %d bytes\n", 4220 ifp->if_xname, len); 4221 return; 4222 } 4223 h = mtod(m, struct lcp_header *); 4224 if (len > ntohs(h->len)) 4225 len = ntohs(h->len); 4226 4227 SPPP_LOCK(sp, RW_WRITER); 4228 4229 switch (h->type) { 4230 /* challenge, failure and success are his authproto */ 4231 case CHAP_CHALLENGE: 4232 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4233 /* can't do anything useful */ 4234 sp->pp_auth_failures++; 4235 printf("%s: chap input without my name and my secret being set\n", 4236 ifp->if_xname); 4237 break; 4238 } 4239 value = 1 + (u_char *)(h + 1); 4240 value_len = value[-1]; 4241 name = value + value_len; 4242 name_len = len - value_len - 5; 4243 if (name_len < 0) { 4244 if (debug) { 4245 log(LOG_DEBUG, 4246 "%s: chap corrupted challenge " 4247 "<%s id=0x%x len=%d", 4248 ifp->if_xname, 4249 sppp_auth_type_name(PPP_CHAP, h->type), 4250 h->ident, ntohs(h->len)); 4251 if (len > 4) 4252 sppp_print_bytes((u_char *)(h + 1), 4253 len - 4); 4254 addlog(">\n"); 4255 } 4256 break; 4257 } 4258 4259 if (debug) { 4260 log(LOG_DEBUG, 4261 "%s: chap input <%s id=0x%x len=%d name=", 4262 ifp->if_xname, 4263 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 4264 ntohs(h->len)); 4265 sppp_print_string((char *) name, name_len); 4266 addlog(" value-size=%d value=", value_len); 4267 sppp_print_bytes(value, value_len); 4268 addlog(">\n"); 4269 } 4270 4271 /* Compute reply value. */ 4272 MD5Init(&ctx); 4273 MD5Update(&ctx, &h->ident, 1); 4274 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 4275 MD5Update(&ctx, value, value_len); 4276 MD5Final(digest, &ctx); 4277 dsize = sizeof digest; 4278 4279 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 4280 sizeof dsize, (const char *)&dsize, 4281 sizeof digest, digest, 4282 sp->myauth.name_len, 4283 sp->myauth.name, 4284 0); 4285 break; 4286 4287 case CHAP_SUCCESS: 4288 if (debug) { 4289 log(LOG_DEBUG, "%s: chap success", 4290 ifp->if_xname); 4291 if (len > 4) { 4292 addlog(": "); 4293 sppp_print_string((char *)(h + 1), len - 4); 4294 } 4295 addlog("\n"); 4296 } 4297 x = splnet(); 4298 sp->pp_auth_failures = 0; 4299 sp->pp_flags &= ~PP_NEEDAUTH; 4300 if (sp->myauth.proto == PPP_CHAP && 4301 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4302 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 4303 /* 4304 * We are authenticator for CHAP but didn't 4305 * complete yet. Leave it to tlu to proceed 4306 * to network phase. 4307 */ 4308 splx(x); 4309 break; 4310 } 4311 splx(x); 4312 sppp_phase_network(sp); 4313 break; 4314 4315 case CHAP_FAILURE: 4316 x = splnet(); 4317 sp->pp_auth_failures++; 4318 splx(x); 4319 if (debug) { 4320 log(LOG_INFO, "%s: chap failure", 4321 ifp->if_xname); 4322 if (len > 4) { 4323 addlog(": "); 4324 sppp_print_string((char *)(h + 1), len - 4); 4325 } 4326 addlog("\n"); 4327 } else 4328 log(LOG_INFO, "%s: chap failure\n", 4329 ifp->if_xname); 4330 /* await LCP shutdown by authenticator */ 4331 break; 4332 4333 /* response is my authproto */ 4334 case CHAP_RESPONSE: 4335 if (sp->hisauth.secret == NULL) { 4336 /* can't do anything useful */ 4337 printf("%s: chap input without his secret being set\n", 4338 ifp->if_xname); 4339 break; 4340 } 4341 value = 1 + (u_char *)(h + 1); 4342 value_len = value[-1]; 4343 name = value + value_len; 4344 name_len = len - value_len - 5; 4345 if (name_len < 0) { 4346 if (debug) { 4347 log(LOG_DEBUG, 4348 "%s: chap corrupted response " 4349 "<%s id=0x%x len=%d", 4350 ifp->if_xname, 4351 sppp_auth_type_name(PPP_CHAP, h->type), 4352 h->ident, ntohs(h->len)); 4353 if (len > 4) 4354 sppp_print_bytes((u_char *)(h + 1), 4355 len - 4); 4356 addlog(">\n"); 4357 } 4358 break; 4359 } 4360 if (h->ident != sp->confid[IDX_CHAP]) { 4361 if (debug) 4362 log(LOG_DEBUG, 4363 "%s: chap dropping response for old ID " 4364 "(got %d, expected %d)\n", 4365 ifp->if_xname, 4366 h->ident, sp->confid[IDX_CHAP]); 4367 break; 4368 } 4369 if (sp->hisauth.name != NULL && 4370 (name_len != sp->hisauth.name_len 4371 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 4372 log(LOG_INFO, "%s: chap response, his name ", 4373 ifp->if_xname); 4374 sppp_print_string(name, name_len); 4375 addlog(" != expected "); 4376 sppp_print_string(sp->hisauth.name, 4377 sp->hisauth.name_len); 4378 addlog("\n"); 4379 goto chap_failure; 4380 } 4381 if (debug) { 4382 log(LOG_DEBUG, "%s: chap input(%s) " 4383 "<%s id=0x%x len=%d name=", 4384 ifp->if_xname, 4385 sppp_state_name(sp->state[IDX_CHAP]), 4386 sppp_auth_type_name(PPP_CHAP, h->type), 4387 h->ident, ntohs(h->len)); 4388 sppp_print_string((char *)name, name_len); 4389 addlog(" value-size=%d value=", value_len); 4390 sppp_print_bytes(value, value_len); 4391 addlog(">\n"); 4392 } 4393 if (value_len != sizeof(sp->hisauth.challenge)) { 4394 if (debug) 4395 log(LOG_DEBUG, 4396 "%s: chap bad hash value length: " 4397 "%d bytes, should be %zu\n", 4398 ifp->if_xname, value_len, 4399 sizeof(sp->hisauth.challenge)); 4400 goto chap_failure; 4401 } 4402 4403 MD5Init(&ctx); 4404 MD5Update(&ctx, &h->ident, 1); 4405 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 4406 MD5Update(&ctx, sp->hisauth.challenge, sizeof(sp->hisauth.challenge)); 4407 MD5Final(digest, &ctx); 4408 4409 #define FAILMSG "Failed..." 4410 #define SUCCMSG "Welcome!" 4411 4412 if (value_len != sizeof digest || 4413 memcmp(digest, value, value_len) != 0) { 4414 chap_failure: 4415 KASSERT(SPPP_WLOCKED(sp)); 4416 /* action scn, tld */ 4417 sp->pp_auth_failures++; 4418 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 4419 sizeof(FAILMSG) - 1, (const u_char *)FAILMSG, 4420 0); 4421 chap.tld(sp); 4422 break; 4423 } 4424 sp->pp_auth_failures = 0; 4425 /* action sca, perhaps tlu */ 4426 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 4427 sp->state[IDX_CHAP] == STATE_OPENED) 4428 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 4429 sizeof(SUCCMSG) - 1, (const u_char *)SUCCMSG, 4430 0); 4431 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 4432 sppp_cp_change_state(&chap, sp, STATE_OPENED); 4433 chap.tlu(sp); 4434 } 4435 break; 4436 4437 default: 4438 /* Unknown CHAP packet type -- ignore. */ 4439 if (debug) { 4440 log(LOG_DEBUG, "%s: chap unknown input(%s) " 4441 "<0x%x id=0x%xh len=%d", 4442 ifp->if_xname, 4443 sppp_state_name(sp->state[IDX_CHAP]), 4444 h->type, h->ident, ntohs(h->len)); 4445 if (len > 4) 4446 sppp_print_bytes((u_char *)(h + 1), len - 4); 4447 addlog(">\n"); 4448 } 4449 break; 4450 4451 } 4452 4453 SPPP_UNLOCK(sp); 4454 } 4455 4456 static void 4457 sppp_chap_init(struct sppp *sp) 4458 { 4459 4460 KASSERT(SPPP_WLOCKED(sp)); 4461 4462 /* Chap doesn't have STATE_INITIAL at all. */ 4463 sp->state[IDX_CHAP] = STATE_CLOSED; 4464 sp->fail_counter[IDX_CHAP] = 0; 4465 sp->pp_seq[IDX_CHAP] = 0; 4466 sp->pp_rseq[IDX_CHAP] = 0; 4467 callout_init(&sp->ch[IDX_CHAP], CALLOUT_MPSAFE); 4468 } 4469 4470 static void 4471 sppp_chap_open(struct sppp *sp) 4472 { 4473 4474 KASSERT(SPPP_WLOCKED(sp)); 4475 if (sp->hisauth.proto == PPP_CHAP && 4476 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4477 /* we are authenticator for CHAP, start it */ 4478 chap.scr(sp); 4479 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4480 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4481 } 4482 /* nothing to be done if we are peer, await a challenge */ 4483 } 4484 4485 static void 4486 sppp_chap_close(struct sppp *sp) 4487 { 4488 4489 KASSERT(SPPP_WLOCKED(sp)); 4490 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4491 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4492 } 4493 4494 static void 4495 sppp_chap_TO(void *cookie) 4496 { 4497 struct sppp *sp = (struct sppp *)cookie; 4498 STDDCL; 4499 int s; 4500 4501 s = splnet(); 4502 4503 SPPP_LOCK(sp, RW_WRITER); 4504 4505 if (debug) 4506 log(LOG_DEBUG, "%s: chap TO(%s) rst_counter = %d\n", 4507 ifp->if_xname, 4508 sppp_state_name(sp->state[IDX_CHAP]), 4509 sp->rst_counter[IDX_CHAP]); 4510 4511 if (--sp->rst_counter[IDX_CHAP] < 0) 4512 /* TO- event */ 4513 switch (sp->state[IDX_CHAP]) { 4514 case STATE_REQ_SENT: 4515 chap.tld(sp); 4516 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4517 break; 4518 } 4519 else 4520 /* TO+ (or TO*) event */ 4521 switch (sp->state[IDX_CHAP]) { 4522 case STATE_OPENED: 4523 /* TO* event */ 4524 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4525 /* fall through */ 4526 case STATE_REQ_SENT: 4527 chap.scr(sp); 4528 /* sppp_cp_change_state() will restart the timer */ 4529 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4530 break; 4531 } 4532 4533 SPPP_UNLOCK(sp); 4534 splx(s); 4535 } 4536 4537 static void 4538 sppp_chap_tlu(struct sppp *sp) 4539 { 4540 STDDCL; 4541 int i, x; 4542 4543 KASSERT(SPPP_WLOCKED(sp)); 4544 4545 i = 0; 4546 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4547 4548 /* 4549 * Some broken CHAP implementations (Conware CoNet, firmware 4550 * 4.0.?) don't want to re-authenticate their CHAP once the 4551 * initial challenge-response exchange has taken place. 4552 * Provide for an option to avoid rechallenges. 4553 */ 4554 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4555 /* 4556 * Compute the re-challenge timeout. This will yield 4557 * a number between 300 and 810 seconds. 4558 */ 4559 i = 300 + ((unsigned)(cprng_fast32() & 0xff00) >> 7); 4560 4561 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4562 } 4563 4564 if (debug) { 4565 log(LOG_DEBUG, 4566 "%s: chap %s, ", 4567 ifp->if_xname, 4568 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu"); 4569 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) 4570 addlog("next re-challenge in %d seconds\n", i); 4571 else 4572 addlog("re-challenging supressed\n"); 4573 } 4574 4575 x = splnet(); 4576 sp->pp_auth_failures = 0; 4577 /* indicate to LCP that we need to be closed down */ 4578 sp->lcp.protos |= (1 << IDX_CHAP); 4579 4580 if (sp->pp_flags & PP_NEEDAUTH) { 4581 /* 4582 * Remote is authenticator, but his auth proto didn't 4583 * complete yet. Defer the transition to network 4584 * phase. 4585 */ 4586 splx(x); 4587 return; 4588 } 4589 splx(x); 4590 4591 /* 4592 * If we are already in phase network, we are done here. This 4593 * is the case if this is a dummy tlu event after a re-challenge. 4594 */ 4595 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4596 sppp_phase_network(sp); 4597 } 4598 4599 static void 4600 sppp_chap_tld(struct sppp *sp) 4601 { 4602 STDDCL; 4603 4604 KASSERT(SPPP_WLOCKED(sp)); 4605 4606 if (debug) 4607 log(LOG_DEBUG, "%s: chap tld\n", ifp->if_xname); 4608 callout_stop(&sp->ch[IDX_CHAP]); 4609 sp->lcp.protos &= ~(1 << IDX_CHAP); 4610 4611 lcp.Close(sp); 4612 } 4613 4614 static void 4615 sppp_chap_scr(struct sppp *sp) 4616 { 4617 uint32_t *ch; 4618 u_char clen = 4 * sizeof(uint32_t); 4619 4620 KASSERT(SPPP_WLOCKED(sp)); 4621 4622 if (sp->hisauth.name == NULL) { 4623 /* can't do anything useful */ 4624 printf("%s: chap starting without his name being set\n", 4625 sp->pp_if.if_xname); 4626 return; 4627 } 4628 4629 /* Compute random challenge. */ 4630 ch = (uint32_t *)sp->hisauth.challenge; 4631 cprng_strong(kern_cprng, ch, clen, 0); 4632 4633 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4634 4635 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4636 sizeof clen, (const char *)&clen, 4637 sizeof(sp->hisauth.challenge), sp->hisauth.challenge, 4638 0); 4639 } 4640 4641 /* 4642 *--------------------------------------------------------------------------* 4643 * * 4644 * The PAP implementation. * 4645 * * 4646 *--------------------------------------------------------------------------* 4647 */ 4648 /* 4649 * For PAP, we need to keep a little state also if we are the peer, not the 4650 * authenticator. This is since we don't get a request to authenticate, but 4651 * have to repeatedly authenticate ourself until we got a response (or the 4652 * retry counter is expired). 4653 */ 4654 4655 /* 4656 * Handle incoming PAP packets. */ 4657 static void 4658 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4659 { 4660 STDDCL; 4661 struct lcp_header *h; 4662 int len, x; 4663 u_char mlen; 4664 char *name, *secret; 4665 int name_len, secret_len; 4666 4667 /* 4668 * Malicious input might leave this uninitialized, so 4669 * init to an impossible value. 4670 */ 4671 secret_len = -1; 4672 4673 len = m->m_pkthdr.len; 4674 if (len < 5) { 4675 if (debug) 4676 log(LOG_DEBUG, 4677 "%s: pap invalid packet length: %d bytes\n", 4678 ifp->if_xname, len); 4679 return; 4680 } 4681 h = mtod(m, struct lcp_header *); 4682 if (len > ntohs(h->len)) 4683 len = ntohs(h->len); 4684 4685 SPPP_LOCK(sp, RW_WRITER); 4686 4687 switch (h->type) { 4688 /* PAP request is my authproto */ 4689 case PAP_REQ: 4690 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4691 /* can't do anything useful */ 4692 printf("%s: " 4693 "pap request without his name and his secret being set\n", 4694 ifp->if_xname); 4695 break; 4696 } 4697 name = 1 + (u_char *)(h + 1); 4698 name_len = name[-1]; 4699 secret = name + name_len + 1; 4700 if (name_len > len - 6 || 4701 (secret_len = secret[-1]) > len - 6 - name_len) { 4702 if (debug) { 4703 log(LOG_DEBUG, "%s: pap corrupted input " 4704 "<%s id=0x%x len=%d", 4705 ifp->if_xname, 4706 sppp_auth_type_name(PPP_PAP, h->type), 4707 h->ident, ntohs(h->len)); 4708 if (len > 4) 4709 sppp_print_bytes((u_char *)(h + 1), 4710 len - 4); 4711 addlog(">\n"); 4712 } 4713 break; 4714 } 4715 if (debug) { 4716 log(LOG_DEBUG, "%s: pap input(%s) " 4717 "<%s id=0x%x len=%d name=", 4718 ifp->if_xname, 4719 sppp_state_name(sp->state[IDX_PAP]), 4720 sppp_auth_type_name(PPP_PAP, h->type), 4721 h->ident, ntohs(h->len)); 4722 sppp_print_string((char *)name, name_len); 4723 addlog(" secret="); 4724 sppp_print_string((char *)secret, secret_len); 4725 addlog(">\n"); 4726 } 4727 if (name_len != sp->hisauth.name_len || 4728 secret_len != sp->hisauth.secret_len || 4729 memcmp(name, sp->hisauth.name, name_len) != 0 || 4730 memcmp(secret, sp->hisauth.secret, secret_len) != 0) { 4731 /* action scn, tld */ 4732 sp->pp_auth_failures++; 4733 mlen = sizeof(FAILMSG) - 1; 4734 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4735 sizeof mlen, (const char *)&mlen, 4736 sizeof(FAILMSG) - 1, (const u_char *)FAILMSG, 4737 0); 4738 pap.tld(sp); 4739 break; 4740 } 4741 /* action sca, perhaps tlu */ 4742 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4743 sp->state[IDX_PAP] == STATE_OPENED) { 4744 mlen = sizeof(SUCCMSG) - 1; 4745 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4746 sizeof mlen, (const char *)&mlen, 4747 sizeof(SUCCMSG) - 1, (const u_char *)SUCCMSG, 4748 0); 4749 } 4750 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4751 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4752 pap.tlu(sp); 4753 } 4754 break; 4755 4756 /* ack and nak are his authproto */ 4757 case PAP_ACK: 4758 callout_stop(&sp->pap_my_to_ch); 4759 if (debug) { 4760 log(LOG_DEBUG, "%s: pap success", 4761 ifp->if_xname); 4762 name = 1 + (u_char *)(h + 1); 4763 name_len = name[-1]; 4764 if (len > 5 && name_len < len+4) { 4765 addlog(": "); 4766 sppp_print_string(name, name_len); 4767 } 4768 addlog("\n"); 4769 } 4770 x = splnet(); 4771 sp->pp_auth_failures = 0; 4772 sp->pp_flags &= ~PP_NEEDAUTH; 4773 if (sp->myauth.proto == PPP_PAP && 4774 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4775 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4776 /* 4777 * We are authenticator for PAP but didn't 4778 * complete yet. Leave it to tlu to proceed 4779 * to network phase. 4780 */ 4781 splx(x); 4782 break; 4783 } 4784 splx(x); 4785 sppp_phase_network(sp); 4786 break; 4787 4788 case PAP_NAK: 4789 callout_stop(&sp->pap_my_to_ch); 4790 sp->pp_auth_failures++; 4791 if (debug) { 4792 log(LOG_INFO, "%s: pap failure", 4793 ifp->if_xname); 4794 name = 1 + (u_char *)(h + 1); 4795 name_len = name[-1]; 4796 if (len > 5 && name_len < len+4) { 4797 addlog(": "); 4798 sppp_print_string(name, name_len); 4799 } 4800 addlog("\n"); 4801 } else 4802 log(LOG_INFO, "%s: pap failure\n", 4803 ifp->if_xname); 4804 /* await LCP shutdown by authenticator */ 4805 break; 4806 4807 default: 4808 /* Unknown PAP packet type -- ignore. */ 4809 if (debug) { 4810 log(LOG_DEBUG, "%s: pap corrupted input " 4811 "<0x%x id=0x%x len=%d", 4812 ifp->if_xname, 4813 h->type, h->ident, ntohs(h->len)); 4814 if (len > 4) 4815 sppp_print_bytes((u_char *)(h + 1), len - 4); 4816 addlog(">\n"); 4817 } 4818 break; 4819 } 4820 4821 SPPP_UNLOCK(sp); 4822 } 4823 4824 static void 4825 sppp_pap_init(struct sppp *sp) 4826 { 4827 4828 KASSERT(SPPP_WLOCKED(sp)); 4829 4830 /* PAP doesn't have STATE_INITIAL at all. */ 4831 sp->state[IDX_PAP] = STATE_CLOSED; 4832 sp->fail_counter[IDX_PAP] = 0; 4833 sp->pp_seq[IDX_PAP] = 0; 4834 sp->pp_rseq[IDX_PAP] = 0; 4835 callout_init(&sp->ch[IDX_PAP], CALLOUT_MPSAFE); 4836 callout_init(&sp->pap_my_to_ch, CALLOUT_MPSAFE); 4837 } 4838 4839 static void 4840 sppp_pap_open(struct sppp *sp) 4841 { 4842 4843 KASSERT(SPPP_WLOCKED(sp)); 4844 4845 if (sp->hisauth.proto == PPP_PAP && 4846 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4847 /* we are authenticator for PAP, start our timer */ 4848 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4849 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4850 } 4851 if (sp->myauth.proto == PPP_PAP) { 4852 /* we are peer, send a request, and start a timer */ 4853 pap.scr(sp); 4854 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4855 sppp_pap_my_TO, sp); 4856 } 4857 } 4858 4859 static void 4860 sppp_pap_close(struct sppp *sp) 4861 { 4862 4863 KASSERT(SPPP_WLOCKED(sp)); 4864 4865 if (sp->state[IDX_PAP] != STATE_CLOSED) 4866 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4867 } 4868 4869 /* 4870 * That's the timeout routine if we are authenticator. Since the 4871 * authenticator is basically passive in PAP, we can't do much here. 4872 */ 4873 static void 4874 sppp_pap_TO(void *cookie) 4875 { 4876 struct sppp *sp = (struct sppp *)cookie; 4877 STDDCL; 4878 int s; 4879 4880 s = splnet(); 4881 SPPP_LOCK(sp, RW_WRITER); 4882 4883 if (debug) 4884 log(LOG_DEBUG, "%s: pap TO(%s) rst_counter = %d\n", 4885 ifp->if_xname, 4886 sppp_state_name(sp->state[IDX_PAP]), 4887 sp->rst_counter[IDX_PAP]); 4888 4889 if (--sp->rst_counter[IDX_PAP] < 0) 4890 /* TO- event */ 4891 switch (sp->state[IDX_PAP]) { 4892 case STATE_REQ_SENT: 4893 pap.tld(sp); 4894 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4895 break; 4896 } 4897 else 4898 /* TO+ event, not very much we could do */ 4899 switch (sp->state[IDX_PAP]) { 4900 case STATE_REQ_SENT: 4901 /* sppp_cp_change_state() will restart the timer */ 4902 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4903 break; 4904 } 4905 4906 SPPP_UNLOCK(sp); 4907 splx(s); 4908 } 4909 4910 /* 4911 * That's the timeout handler if we are peer. Since the peer is active, 4912 * we need to retransmit our PAP request since it is apparently lost. 4913 * XXX We should impose a max counter. 4914 */ 4915 static void 4916 sppp_pap_my_TO(void *cookie) 4917 { 4918 struct sppp *sp = (struct sppp *)cookie; 4919 STDDCL; 4920 4921 SPPP_LOCK(sp, RW_WRITER); 4922 if (debug) 4923 log(LOG_DEBUG, "%s: pap peer TO\n", 4924 ifp->if_xname); 4925 4926 pap.scr(sp); 4927 4928 SPPP_UNLOCK(sp); 4929 } 4930 4931 static void 4932 sppp_pap_tlu(struct sppp *sp) 4933 { 4934 STDDCL; 4935 int x; 4936 4937 KASSERT(SPPP_WLOCKED(sp)); 4938 4939 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4940 4941 if (debug) 4942 log(LOG_DEBUG, "%s: %s tlu\n", 4943 ifp->if_xname, pap.name); 4944 4945 x = splnet(); 4946 sp->pp_auth_failures = 0; 4947 /* indicate to LCP that we need to be closed down */ 4948 sp->lcp.protos |= (1 << IDX_PAP); 4949 4950 if (sp->pp_flags & PP_NEEDAUTH) { 4951 /* 4952 * Remote is authenticator, but his auth proto didn't 4953 * complete yet. Defer the transition to network 4954 * phase. 4955 */ 4956 splx(x); 4957 return; 4958 } 4959 splx(x); 4960 sppp_phase_network(sp); 4961 } 4962 4963 static void 4964 sppp_pap_tld(struct sppp *sp) 4965 { 4966 STDDCL; 4967 4968 KASSERT(SPPP_WLOCKED(sp)); 4969 4970 if (debug) 4971 log(LOG_DEBUG, "%s: pap tld\n", ifp->if_xname); 4972 callout_stop(&sp->ch[IDX_PAP]); 4973 callout_stop(&sp->pap_my_to_ch); 4974 sp->lcp.protos &= ~(1 << IDX_PAP); 4975 4976 lcp.Close(sp); 4977 } 4978 4979 static void 4980 sppp_pap_scr(struct sppp *sp) 4981 { 4982 u_char idlen, pwdlen; 4983 4984 KASSERT(SPPP_WLOCKED(sp)); 4985 4986 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4987 /* can't do anything useful */ 4988 printf("%s: pap starting without my name and secret being set\n", 4989 sp->pp_if.if_xname); 4990 return; 4991 } 4992 4993 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4994 pwdlen = sp->myauth.secret_len; 4995 idlen = sp->myauth.name_len; 4996 4997 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 4998 sizeof idlen, (const char *)&idlen, 4999 idlen, sp->myauth.name, 5000 sizeof pwdlen, (const char *)&pwdlen, 5001 pwdlen, sp->myauth.secret, 5002 0); 5003 } 5004 5005 /* 5006 * Random miscellaneous functions. 5007 */ 5008 5009 /* 5010 * Send a PAP or CHAP proto packet. 5011 * 5012 * Varadic function, each of the elements for the ellipsis is of type 5013 * ``size_t mlen, const u_char *msg''. Processing will stop iff 5014 * mlen == 0. 5015 * NOTE: never declare variadic functions with types subject to type 5016 * promotion (i.e. u_char). This is asking for big trouble depending 5017 * on the architecture you are on... 5018 */ 5019 5020 static void 5021 sppp_auth_send(const struct cp *cp, struct sppp *sp, 5022 unsigned int type, unsigned int id, 5023 ...) 5024 { 5025 STDDCL; 5026 struct lcp_header *lh; 5027 struct mbuf *m; 5028 u_char *p; 5029 int len; 5030 size_t pkthdrlen; 5031 unsigned int mlen; 5032 const char *msg; 5033 va_list ap; 5034 5035 KASSERT(SPPP_WLOCKED(sp)); 5036 5037 MGETHDR(m, M_DONTWAIT, MT_DATA); 5038 if (! m) 5039 return; 5040 m_reset_rcvif(m); 5041 5042 if (sp->pp_flags & PP_NOFRAMING) { 5043 *mtod(m, uint16_t *) = htons(cp->proto); 5044 pkthdrlen = 2; 5045 lh = (struct lcp_header *)(mtod(m, uint8_t *)+2); 5046 } else { 5047 struct ppp_header *h; 5048 h = mtod(m, struct ppp_header *); 5049 h->address = PPP_ALLSTATIONS; /* broadcast address */ 5050 h->control = PPP_UI; /* Unnumbered Info */ 5051 h->protocol = htons(cp->proto); 5052 pkthdrlen = PPP_HEADER_LEN; 5053 5054 lh = (struct lcp_header *)(h + 1); 5055 } 5056 5057 lh->type = type; 5058 lh->ident = id; 5059 p = (u_char *)(lh + 1); 5060 5061 va_start(ap, id); 5062 len = 0; 5063 5064 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 5065 msg = va_arg(ap, const char *); 5066 len += mlen; 5067 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 5068 va_end(ap); 5069 m_freem(m); 5070 return; 5071 } 5072 5073 memcpy(p, msg, mlen); 5074 p += mlen; 5075 } 5076 va_end(ap); 5077 5078 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 5079 lh->len = htons(LCP_HEADER_LEN + len); 5080 5081 if (debug) { 5082 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 5083 ifp->if_xname, cp->name, 5084 sppp_auth_type_name(cp->proto, lh->type), 5085 lh->ident, ntohs(lh->len)); 5086 if (len) 5087 sppp_print_bytes((u_char *)(lh + 1), len); 5088 addlog(">\n"); 5089 } 5090 if (IF_QFULL(&sp->pp_cpq)) { 5091 IF_DROP(&sp->pp_fastq); 5092 IF_DROP(&ifp->if_snd); 5093 m_freem(m); 5094 ++ifp->if_oerrors; 5095 return; 5096 } 5097 5098 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 5099 IF_ENQUEUE(&sp->pp_cpq, m); 5100 5101 if (! (ifp->if_flags & IFF_OACTIVE)) { 5102 SPPP_UNLOCK(sp); 5103 if_start_lock(ifp); 5104 SPPP_LOCK(sp, RW_WRITER); 5105 } 5106 } 5107 5108 /* 5109 * Send keepalive packets, every 10 seconds. 5110 */ 5111 static void 5112 sppp_keepalive(void *dummy) 5113 { 5114 struct sppp *sp; 5115 int s; 5116 time_t now; 5117 5118 SPPPQ_LOCK(); 5119 5120 s = splnet(); 5121 now = time_uptime; 5122 for (sp=spppq; sp; sp=sp->pp_next) { 5123 struct ifnet *ifp = NULL; 5124 5125 SPPP_LOCK(sp, RW_WRITER); 5126 ifp = &sp->pp_if; 5127 5128 /* check idle timeout */ 5129 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 5130 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 5131 /* idle timeout is enabled for this interface */ 5132 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 5133 if (ifp->if_flags & IFF_DEBUG) 5134 printf("%s: no activity for %lu seconds\n", 5135 sp->pp_if.if_xname, 5136 (unsigned long)(now-sp->pp_last_activity)); 5137 lcp.Close(sp); 5138 SPPP_UNLOCK(sp); 5139 continue; 5140 } 5141 } 5142 5143 /* Keepalive mode disabled or channel down? */ 5144 if (! (sp->pp_flags & PP_KEEPALIVE) || 5145 ! (ifp->if_flags & IFF_RUNNING)) { 5146 SPPP_UNLOCK(sp); 5147 continue; 5148 } 5149 5150 5151 /* No keepalive in PPP mode if LCP not opened yet. */ 5152 if (! (sp->pp_flags & PP_CISCO) && 5153 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 5154 SPPP_UNLOCK(sp); 5155 continue; 5156 } 5157 5158 /* No echo reply, but maybe user data passed through? */ 5159 if ((now - sp->pp_last_receive) < sp->pp_max_noreceive) { 5160 sp->pp_alivecnt = 0; 5161 SPPP_UNLOCK(sp); 5162 continue; 5163 } 5164 5165 if (sp->pp_alivecnt >= sp->pp_maxalive) { 5166 /* No keepalive packets got. Stop the interface. */ 5167 SPPP_UNLOCK(sp); 5168 if_down (ifp); 5169 SPPP_LOCK(sp, RW_WRITER); 5170 5171 IF_PURGE(&sp->pp_cpq); 5172 5173 if (! (sp->pp_flags & PP_CISCO)) { 5174 printf("%s: LCP keepalive timed out, going to restart the connection\n", 5175 ifp->if_xname); 5176 sp->pp_alivecnt = 0; 5177 5178 /* we are down, close all open protocols */ 5179 lcp.Close(sp); 5180 5181 /* And now prepare LCP to reestablish the link, if configured to do so. */ 5182 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 5183 5184 /* Close connection immediately, completition of this 5185 * will summon the magic needed to reestablish it. */ 5186 sppp_notify_tlf_wlocked(sp); 5187 5188 SPPP_UNLOCK(sp); 5189 continue; 5190 } 5191 } 5192 if (sp->pp_alivecnt < sp->pp_maxalive) 5193 ++sp->pp_alivecnt; 5194 if (sp->pp_flags & PP_CISCO) 5195 sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ, 5196 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 5197 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 5198 int32_t nmagic = htonl(sp->lcp.magic); 5199 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 5200 sppp_cp_send(sp, PPP_LCP, ECHO_REQ, 5201 sp->lcp.echoid, 4, &nmagic); 5202 } 5203 5204 SPPP_UNLOCK(sp); 5205 } 5206 splx(s); 5207 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 5208 5209 SPPPQ_UNLOCK(); 5210 } 5211 5212 #ifdef INET 5213 /* 5214 * Get both IP addresses. 5215 */ 5216 static void 5217 sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, uint32_t *srcmask) 5218 { 5219 struct ifnet *ifp = &sp->pp_if; 5220 struct ifaddr *ifa; 5221 struct sockaddr_in *si, *sm; 5222 uint32_t ssrc, ddst; 5223 int s; 5224 struct psref psref; 5225 5226 sm = NULL; 5227 ssrc = ddst = 0; 5228 /* 5229 * Pick the first AF_INET address from the list, 5230 * aliases don't make any sense on a p2p link anyway. 5231 */ 5232 si = 0; 5233 s = pserialize_read_enter(); 5234 IFADDR_READER_FOREACH(ifa, ifp) { 5235 if (ifa->ifa_addr->sa_family == AF_INET) { 5236 si = (struct sockaddr_in *)ifa->ifa_addr; 5237 sm = (struct sockaddr_in *)ifa->ifa_netmask; 5238 if (si) { 5239 ifa_acquire(ifa, &psref); 5240 break; 5241 } 5242 } 5243 } 5244 pserialize_read_exit(s); 5245 if (ifa) { 5246 if (si && si->sin_addr.s_addr) { 5247 ssrc = si->sin_addr.s_addr; 5248 if (srcmask) 5249 *srcmask = ntohl(sm->sin_addr.s_addr); 5250 } 5251 5252 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 5253 if (si && si->sin_addr.s_addr) 5254 ddst = si->sin_addr.s_addr; 5255 ifa_release(ifa, &psref); 5256 } 5257 5258 if (dst) *dst = ntohl(ddst); 5259 if (src) *src = ntohl(ssrc); 5260 } 5261 5262 /* 5263 * Set IP addresses. Must be called at splnet. 5264 * If an address is 0, leave it the way it is. 5265 */ 5266 static void 5267 sppp_set_ip_addrs_work(struct work *wk, struct sppp *sp) 5268 { 5269 STDDCL; 5270 struct ifaddr *ifa; 5271 struct sockaddr_in *si, *dest; 5272 uint32_t myaddr = 0, hisaddr = 0; 5273 int s; 5274 5275 IFNET_LOCK(ifp); 5276 5277 /* 5278 * Pick the first AF_INET address from the list, 5279 * aliases don't make any sense on a p2p link anyway. 5280 */ 5281 si = dest = NULL; 5282 s = pserialize_read_enter(); 5283 IFADDR_READER_FOREACH(ifa, ifp) { 5284 if (ifa->ifa_addr->sa_family == AF_INET) { 5285 si = (struct sockaddr_in *)ifa->ifa_addr; 5286 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5287 break; 5288 } 5289 } 5290 pserialize_read_exit(s); 5291 5292 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 5293 myaddr = sp->ipcp.req_myaddr; 5294 else if (si != NULL) 5295 myaddr = ntohl(si->sin_addr.s_addr); 5296 5297 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 5298 hisaddr = sp->ipcp.req_hisaddr; 5299 else if (dest != NULL) 5300 hisaddr = ntohl(dest->sin_addr.s_addr); 5301 5302 if (si != NULL && dest != NULL) { 5303 int error; 5304 struct sockaddr_in new_sin = *si; 5305 struct sockaddr_in new_dst = *dest; 5306 5307 if (myaddr != 0) 5308 new_sin.sin_addr.s_addr = htonl(myaddr); 5309 if (hisaddr != 0) { 5310 new_dst.sin_addr.s_addr = htonl(hisaddr); 5311 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) 5312 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 5313 } 5314 5315 in_addrhash_remove(ifatoia(ifa)); 5316 5317 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5318 5319 in_addrhash_insert(ifatoia(ifa)); 5320 5321 if (debug && error) 5322 { 5323 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5324 ifp->if_xname, __func__, error); 5325 } 5326 if (!error) { 5327 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5328 } 5329 } 5330 5331 if (ifp->if_mtu > sp->lcp.their_mru) { 5332 sp->pp_saved_mtu = ifp->if_mtu; 5333 ifp->if_mtu = sp->lcp.their_mru; 5334 if (debug) 5335 log(LOG_DEBUG, 5336 "%s: setting MTU to %" PRIu64 " bytes\n", 5337 ifp->if_xname, ifp->if_mtu); 5338 } 5339 5340 IFNET_UNLOCK(ifp); 5341 5342 sppp_notify_con(sp); 5343 } 5344 5345 static void 5346 sppp_set_ip_addrs(struct sppp *sp) 5347 { 5348 struct ifnet *ifp = &sp->pp_if; 5349 5350 if (!pcq_put(sp->ipcp.update_addrs_q, (void *)IPCP_SET_ADDRS)) { 5351 log(LOG_WARNING, "%s: cannot enqueued, ignore sppp_clear_ip_addrs\n", 5352 ifp->if_xname); 5353 return; 5354 } 5355 5356 if (atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1) == 1) 5357 return; 5358 5359 workqueue_enqueue(sp->ipcp.update_addrs_wq, &sp->ipcp.update_addrs_wk, NULL); 5360 } 5361 5362 /* 5363 * Clear IP addresses. Must be called at splnet. 5364 */ 5365 static void 5366 sppp_clear_ip_addrs_work(struct work *wk, struct sppp *sp) 5367 { 5368 STDDCL; 5369 struct ifaddr *ifa; 5370 struct sockaddr_in *si, *dest; 5371 int s; 5372 5373 IFNET_LOCK(ifp); 5374 5375 /* 5376 * Pick the first AF_INET address from the list, 5377 * aliases don't make any sense on a p2p link anyway. 5378 */ 5379 si = dest = NULL; 5380 s = pserialize_read_enter(); 5381 IFADDR_READER_FOREACH(ifa, ifp) { 5382 if (ifa->ifa_addr->sa_family == AF_INET) { 5383 si = (struct sockaddr_in *)ifa->ifa_addr; 5384 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5385 break; 5386 } 5387 } 5388 pserialize_read_exit(s); 5389 5390 if (si != NULL) { 5391 struct sockaddr_in new_sin = *si; 5392 struct sockaddr_in new_dst = *dest; 5393 int error; 5394 5395 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 5396 new_sin.sin_addr.s_addr = 0; 5397 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 5398 new_dst.sin_addr.s_addr = sp->ipcp.saved_hisaddr; 5399 5400 in_addrhash_remove(ifatoia(ifa)); 5401 5402 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5403 5404 in_addrhash_insert(ifatoia(ifa)); 5405 5406 if (debug && error) 5407 { 5408 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5409 ifp->if_xname, __func__, error); 5410 } 5411 if (!error) { 5412 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5413 } 5414 } 5415 5416 if (sp->pp_saved_mtu > 0) { 5417 ifp->if_mtu = sp->pp_saved_mtu; 5418 sp->pp_saved_mtu = 0; 5419 if (debug) 5420 log(LOG_DEBUG, 5421 "%s: resetting MTU to %" PRIu64 " bytes\n", 5422 ifp->if_xname, ifp->if_mtu); 5423 } 5424 5425 IFNET_UNLOCK(ifp); 5426 } 5427 5428 static void 5429 sppp_clear_ip_addrs(struct sppp *sp) 5430 { 5431 struct ifnet *ifp = &sp->pp_if; 5432 5433 if (!pcq_put(sp->ipcp.update_addrs_q, (void *)IPCP_CLEAR_ADDRS)) { 5434 log(LOG_WARNING, "%s: cannot enqueued, ignore sppp_clear_ip_addrs\n", 5435 ifp->if_xname); 5436 return; 5437 } 5438 5439 if (atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1) == 1) 5440 return; 5441 5442 workqueue_enqueue(sp->ipcp.update_addrs_wq, &sp->ipcp.update_addrs_wk, NULL); 5443 } 5444 5445 static void 5446 sppp_update_ip_addrs_work(struct work *wk, void *arg) 5447 { 5448 struct sppp *sp = arg; 5449 void *work; 5450 5451 atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 0); 5452 5453 while ((work = pcq_get(sp->ipcp.update_addrs_q)) != NULL) { 5454 int update = (intptr_t)work; 5455 5456 if (update == IPCP_SET_ADDRS) 5457 sppp_set_ip_addrs_work(wk, sp); 5458 else if (update == IPCP_CLEAR_ADDRS) 5459 sppp_clear_ip_addrs_work(wk, sp); 5460 } 5461 } 5462 #endif 5463 5464 #ifdef INET6 5465 /* 5466 * Get both IPv6 addresses. 5467 */ 5468 static void 5469 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 5470 struct in6_addr *srcmask) 5471 { 5472 struct ifnet *ifp = &sp->pp_if; 5473 struct ifaddr *ifa; 5474 struct sockaddr_in6 *si, *sm; 5475 struct in6_addr ssrc, ddst; 5476 int s; 5477 struct psref psref; 5478 5479 sm = NULL; 5480 memset(&ssrc, 0, sizeof(ssrc)); 5481 memset(&ddst, 0, sizeof(ddst)); 5482 /* 5483 * Pick the first link-local AF_INET6 address from the list, 5484 * aliases don't make any sense on a p2p link anyway. 5485 */ 5486 si = 0; 5487 s = pserialize_read_enter(); 5488 IFADDR_READER_FOREACH(ifa, ifp) { 5489 if (ifa->ifa_addr->sa_family == AF_INET6) { 5490 si = (struct sockaddr_in6 *)ifa->ifa_addr; 5491 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 5492 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) { 5493 ifa_acquire(ifa, &psref); 5494 break; 5495 } 5496 } 5497 } 5498 pserialize_read_exit(s); 5499 5500 if (ifa) { 5501 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 5502 memcpy(&ssrc, &si->sin6_addr, sizeof(ssrc)); 5503 if (srcmask) { 5504 memcpy(srcmask, &sm->sin6_addr, 5505 sizeof(*srcmask)); 5506 } 5507 } 5508 5509 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 5510 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 5511 memcpy(&ddst, &si->sin6_addr, sizeof(ddst)); 5512 ifa_release(ifa, &psref); 5513 } 5514 5515 if (dst) 5516 memcpy(dst, &ddst, sizeof(*dst)); 5517 if (src) 5518 memcpy(src, &ssrc, sizeof(*src)); 5519 } 5520 5521 #ifdef IPV6CP_MYIFID_DYN 5522 /* 5523 * Generate random ifid. 5524 */ 5525 static void 5526 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 5527 { 5528 /* TBD */ 5529 } 5530 5531 /* 5532 * Set my IPv6 address. Must be called at splnet. 5533 */ 5534 static void 5535 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 5536 { 5537 STDDCL; 5538 struct ifaddr *ifa; 5539 struct sockaddr_in6 *sin6; 5540 int s; 5541 struct psref psref; 5542 5543 IFNET_LOCK(ifp); 5544 5545 /* 5546 * Pick the first link-local AF_INET6 address from the list, 5547 * aliases don't make any sense on a p2p link anyway. 5548 */ 5549 5550 sin6 = NULL; 5551 s = pserialize_read_enter(); 5552 IFADDR_READER_FOREACH(ifa, ifp) 5553 { 5554 if (ifa->ifa_addr->sa_family == AF_INET6) 5555 { 5556 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 5557 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 5558 ifa_acquire(ifa, &psref); 5559 break; 5560 } 5561 } 5562 } 5563 pserialize_read_exit(s); 5564 5565 if (ifa && sin6) 5566 { 5567 int error; 5568 struct sockaddr_in6 new_sin6 = *sin6; 5569 5570 memcpy(&new_sin6.sin6_addr, src, sizeof(new_sin6.sin6_addr)); 5571 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 5572 if (debug && error) 5573 { 5574 log(LOG_DEBUG, "%s: %s: in6_ifinit failed, error=%d\n", 5575 ifp->if_xname, __func__, error); 5576 } 5577 if (!error) { 5578 pfil_run_addrhooks(if_pfil, SIOCAIFADDR_IN6, ifa); 5579 } 5580 ifa_release(ifa, &psref); 5581 } 5582 5583 IFNET_UNLOCK(ifp); 5584 } 5585 #endif 5586 5587 /* 5588 * Suggest a candidate address to be used by peer. 5589 */ 5590 static void 5591 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 5592 { 5593 struct in6_addr myaddr; 5594 struct timeval tv; 5595 5596 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 5597 5598 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 5599 microtime(&tv); 5600 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 5601 myaddr.s6_addr[14] ^= 0xff; 5602 myaddr.s6_addr[15] ^= 0xff; 5603 } else { 5604 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 5605 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 5606 } 5607 if (suggest) 5608 memcpy(suggest, &myaddr, sizeof(myaddr)); 5609 } 5610 #endif /*INET6*/ 5611 5612 /* 5613 * Process ioctl requests specific to the PPP interface. 5614 * Permissions have already been checked. 5615 */ 5616 static int 5617 sppp_params(struct sppp *sp, u_long cmd, void *data) 5618 { 5619 switch (cmd) { 5620 case SPPPGETAUTHCFG: 5621 { 5622 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5623 int error; 5624 size_t len; 5625 5626 SPPP_LOCK(sp, RW_READER); 5627 5628 cfg->myauthflags = sp->myauth.flags; 5629 cfg->hisauthflags = sp->hisauth.flags; 5630 strlcpy(cfg->ifname, sp->pp_if.if_xname, sizeof(cfg->ifname)); 5631 cfg->hisauth = 0; 5632 if (sp->hisauth.proto) 5633 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5634 cfg->myauth = 0; 5635 if (sp->myauth.proto) 5636 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5637 if (cfg->myname_length == 0) { 5638 if (sp->myauth.name != NULL) 5639 cfg->myname_length = sp->myauth.name_len + 1; 5640 } else { 5641 if (sp->myauth.name == NULL) { 5642 cfg->myname_length = 0; 5643 } else { 5644 len = sp->myauth.name_len + 1; 5645 5646 5647 if (cfg->myname_length < len) { 5648 SPPP_UNLOCK(sp); 5649 return (ENAMETOOLONG); 5650 } 5651 error = copyout(sp->myauth.name, cfg->myname, len); 5652 if (error) { 5653 SPPP_UNLOCK(sp); 5654 return error; 5655 } 5656 } 5657 } 5658 if (cfg->hisname_length == 0) { 5659 if (sp->hisauth.name != NULL) 5660 cfg->hisname_length = sp->hisauth.name_len + 1; 5661 } else { 5662 if (sp->hisauth.name == NULL) { 5663 cfg->hisname_length = 0; 5664 } else { 5665 len = sp->hisauth.name_len + 1; 5666 5667 if (cfg->hisname_length < len) { 5668 SPPP_UNLOCK(sp); 5669 return (ENAMETOOLONG); 5670 } 5671 error = copyout(sp->hisauth.name, cfg->hisname, len); 5672 if (error) { 5673 SPPP_UNLOCK(sp); 5674 return error; 5675 } 5676 } 5677 } 5678 SPPP_UNLOCK(sp); 5679 } 5680 break; 5681 case SPPPSETAUTHCFG: 5682 { 5683 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5684 int error; 5685 5686 SPPP_LOCK(sp, RW_WRITER); 5687 5688 if (sp->myauth.name) { 5689 free(sp->myauth.name, M_DEVBUF); 5690 sp->myauth.name = NULL; 5691 } 5692 if (sp->myauth.secret) { 5693 free(sp->myauth.secret, M_DEVBUF); 5694 sp->myauth.secret = NULL; 5695 } 5696 if (sp->hisauth.name) { 5697 free(sp->hisauth.name, M_DEVBUF); 5698 sp->hisauth.name = NULL; 5699 } 5700 if (sp->hisauth.secret) { 5701 free(sp->hisauth.secret, M_DEVBUF); 5702 sp->hisauth.secret = NULL; 5703 } 5704 5705 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5706 if (cfg->hisname_length >= MCLBYTES) { 5707 SPPP_UNLOCK(sp); 5708 return (ENAMETOOLONG); 5709 } 5710 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5711 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5712 if (error) { 5713 free(sp->hisauth.name, M_DEVBUF); 5714 sp->hisauth.name = NULL; 5715 SPPP_UNLOCK(sp); 5716 return error; 5717 } 5718 sp->hisauth.name_len = cfg->hisname_length - 1; 5719 sp->hisauth.name[sp->hisauth.name_len] = 0; 5720 } 5721 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5722 if (cfg->hissecret_length >= MCLBYTES) { 5723 SPPP_UNLOCK(sp); 5724 return (ENAMETOOLONG); 5725 } 5726 sp->hisauth.secret = malloc(cfg->hissecret_length, 5727 M_DEVBUF, M_WAITOK); 5728 error = copyin(cfg->hissecret, sp->hisauth.secret, 5729 cfg->hissecret_length); 5730 if (error) { 5731 free(sp->hisauth.secret, M_DEVBUF); 5732 sp->hisauth.secret = NULL; 5733 SPPP_UNLOCK(sp); 5734 return error; 5735 } 5736 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5737 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5738 } 5739 if (cfg->myname != NULL && cfg->myname_length > 0) { 5740 if (cfg->myname_length >= MCLBYTES) { 5741 SPPP_UNLOCK(sp); 5742 return (ENAMETOOLONG); 5743 } 5744 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5745 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5746 if (error) { 5747 free(sp->myauth.name, M_DEVBUF); 5748 sp->myauth.name = NULL; 5749 SPPP_UNLOCK(sp); 5750 return error; 5751 } 5752 sp->myauth.name_len = cfg->myname_length - 1; 5753 sp->myauth.name[sp->myauth.name_len] = 0; 5754 } 5755 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5756 if (cfg->mysecret_length >= MCLBYTES) { 5757 SPPP_UNLOCK(sp); 5758 return (ENAMETOOLONG); 5759 } 5760 sp->myauth.secret = malloc(cfg->mysecret_length, 5761 M_DEVBUF, M_WAITOK); 5762 error = copyin(cfg->mysecret, sp->myauth.secret, 5763 cfg->mysecret_length); 5764 if (error) { 5765 free(sp->myauth.secret, M_DEVBUF); 5766 sp->myauth.secret = NULL; 5767 SPPP_UNLOCK(sp); 5768 return error; 5769 } 5770 sp->myauth.secret_len = cfg->mysecret_length - 1; 5771 sp->myauth.secret[sp->myauth.secret_len] = 0; 5772 } 5773 sp->myauth.flags = cfg->myauthflags; 5774 if (cfg->myauth) 5775 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5776 sp->hisauth.flags = cfg->hisauthflags; 5777 if (cfg->hisauth) 5778 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5779 sp->pp_auth_failures = 0; 5780 if (sp->hisauth.proto != 0) 5781 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 5782 else 5783 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 5784 5785 SPPP_UNLOCK(sp); 5786 } 5787 break; 5788 case SPPPGETLCPCFG: 5789 { 5790 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5791 5792 SPPP_LOCK(sp, RW_READER); 5793 lcpp->lcp_timeout = sp->lcp.timeout; 5794 SPPP_UNLOCK(sp); 5795 } 5796 break; 5797 case SPPPSETLCPCFG: 5798 { 5799 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5800 5801 SPPP_LOCK(sp, RW_WRITER); 5802 sp->lcp.timeout = lcpp->lcp_timeout; 5803 SPPP_UNLOCK(sp); 5804 } 5805 break; 5806 case SPPPGETSTATUS: 5807 { 5808 struct spppstatus *status = (struct spppstatus *)data; 5809 5810 SPPP_LOCK(sp, RW_READER); 5811 status->phase = sp->pp_phase; 5812 SPPP_UNLOCK(sp); 5813 } 5814 break; 5815 case SPPPGETSTATUSNCP: 5816 { 5817 struct spppstatusncp *status = (struct spppstatusncp *)data; 5818 5819 SPPP_LOCK(sp, RW_READER); 5820 status->phase = sp->pp_phase; 5821 status->ncpup = sppp_ncp_check(sp); 5822 SPPP_UNLOCK(sp); 5823 } 5824 break; 5825 case SPPPGETIDLETO: 5826 { 5827 struct spppidletimeout *to = (struct spppidletimeout *)data; 5828 5829 SPPP_LOCK(sp, RW_READER); 5830 to->idle_seconds = sp->pp_idle_timeout; 5831 SPPP_UNLOCK(sp); 5832 } 5833 break; 5834 case SPPPSETIDLETO: 5835 { 5836 struct spppidletimeout *to = (struct spppidletimeout *)data; 5837 5838 SPPP_LOCK(sp, RW_WRITER); 5839 sp->pp_idle_timeout = to->idle_seconds; 5840 SPPP_UNLOCK(sp); 5841 } 5842 break; 5843 case SPPPSETAUTHFAILURE: 5844 { 5845 struct spppauthfailuresettings *afsettings = 5846 (struct spppauthfailuresettings *)data; 5847 5848 SPPP_LOCK(sp, RW_WRITER); 5849 sp->pp_max_auth_fail = afsettings->max_failures; 5850 sp->pp_auth_failures = 0; 5851 SPPP_UNLOCK(sp); 5852 } 5853 break; 5854 case SPPPGETAUTHFAILURES: 5855 { 5856 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5857 5858 SPPP_LOCK(sp, RW_READER); 5859 stats->auth_failures = sp->pp_auth_failures; 5860 stats->max_failures = sp->pp_max_auth_fail; 5861 SPPP_UNLOCK(sp); 5862 } 5863 break; 5864 case SPPPSETDNSOPTS: 5865 { 5866 struct spppdnssettings *req = (struct spppdnssettings *)data; 5867 5868 SPPP_LOCK(sp, RW_WRITER); 5869 sp->query_dns = req->query_dns & 3; 5870 SPPP_UNLOCK(sp); 5871 } 5872 break; 5873 case SPPPGETDNSOPTS: 5874 { 5875 struct spppdnssettings *req = (struct spppdnssettings *)data; 5876 5877 SPPP_LOCK(sp, RW_READER); 5878 req->query_dns = sp->query_dns; 5879 SPPP_UNLOCK(sp); 5880 } 5881 break; 5882 case SPPPGETDNSADDRS: 5883 { 5884 struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data; 5885 5886 SPPP_LOCK(sp, RW_READER); 5887 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5888 SPPP_UNLOCK(sp); 5889 } 5890 break; 5891 case SPPPGETKEEPALIVE: 5892 { 5893 struct spppkeepalivesettings *settings = 5894 (struct spppkeepalivesettings*)data; 5895 5896 SPPP_LOCK(sp, RW_READER); 5897 settings->maxalive = sp->pp_maxalive; 5898 settings->max_noreceive = sp->pp_max_noreceive; 5899 SPPP_UNLOCK(sp); 5900 } 5901 break; 5902 case SPPPSETKEEPALIVE: 5903 { 5904 struct spppkeepalivesettings *settings = 5905 (struct spppkeepalivesettings*)data; 5906 5907 SPPP_LOCK(sp, RW_WRITER); 5908 sp->pp_maxalive = settings->maxalive; 5909 sp->pp_max_noreceive = settings->max_noreceive; 5910 SPPP_UNLOCK(sp); 5911 } 5912 break; 5913 #if defined(COMPAT_50) || defined(MODULAR) 5914 case __SPPPGETIDLETO50: 5915 { 5916 struct spppidletimeout50 *to = (struct spppidletimeout50 *)data; 5917 5918 SPPP_LOCK(sp, RW_READER); 5919 to->idle_seconds = (uint32_t)sp->pp_idle_timeout; 5920 SPPP_UNLOCK(sp); 5921 } 5922 break; 5923 case __SPPPSETIDLETO50: 5924 { 5925 struct spppidletimeout50 *to = (struct spppidletimeout50 *)data; 5926 5927 SPPP_LOCK(sp, RW_WRITER); 5928 sp->pp_idle_timeout = (time_t)to->idle_seconds; 5929 SPPP_UNLOCK(sp); 5930 } 5931 break; 5932 case __SPPPGETKEEPALIVE50: 5933 { 5934 struct spppkeepalivesettings50 *settings = 5935 (struct spppkeepalivesettings50*)data; 5936 5937 SPPP_LOCK(sp, RW_READER); 5938 settings->maxalive = sp->pp_maxalive; 5939 settings->max_noreceive = (uint32_t)sp->pp_max_noreceive; 5940 SPPP_UNLOCK(sp); 5941 } 5942 break; 5943 case __SPPPSETKEEPALIVE50: 5944 { 5945 struct spppkeepalivesettings50 *settings = 5946 (struct spppkeepalivesettings50*)data; 5947 5948 SPPP_LOCK(sp, RW_WRITER); 5949 sp->pp_maxalive = settings->maxalive; 5950 sp->pp_max_noreceive = (time_t)settings->max_noreceive; 5951 SPPP_UNLOCK(sp); 5952 } 5953 break; 5954 #endif /* COMPAT_50 || MODULAR */ 5955 default: 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 } 6057 snprintf(buf, sizeof(buf), "0x%x", opt); 6058 return buf; 6059 } 6060 6061 static const char * 6062 sppp_ipcp_opt_name(u_char opt) 6063 { 6064 static char buf[12]; 6065 switch (opt) { 6066 case IPCP_OPT_ADDRESSES: return "addresses"; 6067 case IPCP_OPT_COMPRESSION: return "compression"; 6068 case IPCP_OPT_ADDRESS: return "address"; 6069 } 6070 snprintf(buf, sizeof(buf), "0x%x", opt); 6071 return buf; 6072 } 6073 6074 #ifdef INET6 6075 static const char * 6076 sppp_ipv6cp_opt_name(u_char opt) 6077 { 6078 static char buf[12]; 6079 switch (opt) { 6080 case IPV6CP_OPT_IFID: return "ifid"; 6081 case IPV6CP_OPT_COMPRESSION: return "compression"; 6082 } 6083 snprintf(buf, sizeof(buf), "0x%x", opt); 6084 return buf; 6085 } 6086 #endif 6087 6088 static const char * 6089 sppp_state_name(int state) 6090 { 6091 switch (state) { 6092 case STATE_INITIAL: return "initial"; 6093 case STATE_STARTING: return "starting"; 6094 case STATE_CLOSED: return "closed"; 6095 case STATE_STOPPED: return "stopped"; 6096 case STATE_CLOSING: return "closing"; 6097 case STATE_STOPPING: return "stopping"; 6098 case STATE_REQ_SENT: return "req-sent"; 6099 case STATE_ACK_RCVD: return "ack-rcvd"; 6100 case STATE_ACK_SENT: return "ack-sent"; 6101 case STATE_OPENED: return "opened"; 6102 } 6103 return "illegal"; 6104 } 6105 6106 static const char * 6107 sppp_phase_name(int phase) 6108 { 6109 switch (phase) { 6110 case SPPP_PHASE_DEAD: return "dead"; 6111 case SPPP_PHASE_ESTABLISH: return "establish"; 6112 case SPPP_PHASE_TERMINATE: return "terminate"; 6113 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 6114 case SPPP_PHASE_NETWORK: return "network"; 6115 } 6116 return "illegal"; 6117 } 6118 6119 static const char * 6120 sppp_proto_name(u_short proto) 6121 { 6122 static char buf[12]; 6123 switch (proto) { 6124 case PPP_LCP: return "lcp"; 6125 case PPP_IPCP: return "ipcp"; 6126 case PPP_PAP: return "pap"; 6127 case PPP_CHAP: return "chap"; 6128 case PPP_IPV6CP: return "ipv6cp"; 6129 } 6130 snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto); 6131 return buf; 6132 } 6133 6134 static void 6135 sppp_print_bytes(const u_char *p, u_short len) 6136 { 6137 addlog(" %02x", *p++); 6138 while (--len > 0) 6139 addlog("-%02x", *p++); 6140 } 6141 6142 static void 6143 sppp_print_string(const char *p, u_short len) 6144 { 6145 u_char c; 6146 6147 while (len-- > 0) { 6148 c = *p++; 6149 /* 6150 * Print only ASCII chars directly. RFC 1994 recommends 6151 * using only them, but we don't rely on it. */ 6152 if (c < ' ' || c > '~') 6153 addlog("\\x%x", c); 6154 else 6155 addlog("%c", c); 6156 } 6157 } 6158 6159 static const char * 6160 sppp_dotted_quad(uint32_t addr) 6161 { 6162 static char s[16]; 6163 snprintf(s, sizeof(s), "%d.%d.%d.%d", 6164 (int)((addr >> 24) & 0xff), 6165 (int)((addr >> 16) & 0xff), 6166 (int)((addr >> 8) & 0xff), 6167 (int)(addr & 0xff)); 6168 return s; 6169 } 6170 6171 /* a dummy, used to drop uninteresting events */ 6172 static void 6173 sppp_null(struct sppp *unused) 6174 { 6175 /* do just nothing */ 6176 } 6177 /* 6178 * This file is large. Tell emacs to highlight it nevertheless. 6179 * 6180 * Local Variables: 6181 * hilit-auto-highlight-maxout: 120000 6182 * End: 6183 */ 6184 6185 /* 6186 * Module glue 6187 */ 6188 MODULE(MODULE_CLASS_MISC, sppp_subr, NULL); 6189 6190 static int 6191 sppp_subr_modcmd(modcmd_t cmd, void *arg) 6192 { 6193 switch (cmd) { 6194 case MODULE_CMD_INIT: 6195 case MODULE_CMD_FINI: 6196 return 0; 6197 case MODULE_CMD_STAT: 6198 case MODULE_CMD_AUTOUNLOAD: 6199 default: 6200 return ENOTTY; 6201 } 6202 } 6203 6204 static void 6205 sppp_notify_up(struct sppp *sp) 6206 { 6207 6208 SPPP_LOCK(sp, RW_WRITER); 6209 lcp.Up(sp); 6210 SPPP_UNLOCK(sp); 6211 } 6212 6213 static void 6214 sppp_notify_down(struct sppp *sp) 6215 { 6216 6217 SPPP_LOCK(sp, RW_WRITER); 6218 lcp.Down(sp); 6219 SPPP_UNLOCK(sp); 6220 } 6221 6222 static void 6223 sppp_notify_tls_wlocked(struct sppp *sp) 6224 { 6225 6226 KASSERT(SPPP_WLOCKED(sp)); 6227 6228 if (!sp->pp_tls) 6229 return; 6230 6231 SPPP_UNLOCK(sp); 6232 sp->pp_tls(sp); 6233 SPPP_LOCK(sp, RW_WRITER); 6234 } 6235 6236 static void 6237 sppp_notify_tlf_wlocked(struct sppp *sp) 6238 { 6239 6240 KASSERT(SPPP_WLOCKED(sp)); 6241 6242 if (!sp->pp_tlf) 6243 return; 6244 6245 SPPP_UNLOCK(sp); 6246 sp->pp_tlf(sp); 6247 SPPP_LOCK(sp, RW_WRITER); 6248 } 6249 6250 static void 6251 sppp_notify_con(struct sppp *sp) 6252 { 6253 6254 if (!sp->pp_con) 6255 return; 6256 6257 sp->pp_con(sp); 6258 } 6259 6260 #ifdef INET6 6261 static void 6262 sppp_notify_con_wlocked(struct sppp *sp) 6263 { 6264 6265 KASSERT(SPPP_WLOCKED(sp)); 6266 6267 SPPP_UNLOCK(sp); 6268 sppp_notify_con(sp); 6269 SPPP_LOCK(sp, RW_WRITER); 6270 6271 } 6272 #endif 6273 6274 static void 6275 sppp_notify_chg_wlocked(struct sppp *sp) 6276 { 6277 6278 KASSERT(SPPP_WLOCKED(sp)); 6279 6280 if (!sp->pp_chg) 6281 return; 6282 6283 SPPP_UNLOCK(sp); 6284 sp->pp_chg(sp, sp->pp_phase); 6285 SPPP_LOCK(sp, RW_WRITER); 6286 } 6287
Indexes created Fri Sep 26 20:09:58 GMT 2025