if_spppsubr.c revision 1.169
1 /* $NetBSD: if_spppsubr.c,v 1.169 2017/03/28 08:47:19 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 1.169 2017/03/28 08:47:19 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 #ifdef INET 258 #ifndef SPPPSUBR_MPSAFE 259 /* 260 * The following disgusting hack gets around the problem that IP TOS 261 * can't be set yet. We want to put "interactive" traffic on a high 262 * priority queue. To decide if traffic is interactive, we check that 263 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 264 * 265 * XXX is this really still necessary? - joerg - 266 */ 267 static u_short interactive_ports[8] = { 268 0, 513, 0, 0, 269 0, 21, 0, 23, 270 }; 271 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 272 #endif /* SPPPSUBR_MPSAFE */ 273 #endif 274 275 /* almost every function needs these */ 276 #define STDDCL \ 277 struct ifnet *ifp = &sp->pp_if; \ 278 int debug = ifp->if_flags & IFF_DEBUG 279 280 static int sppp_output(struct ifnet *ifp, struct mbuf *m, 281 const struct sockaddr *dst, const struct rtentry *rt); 282 283 static void sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2); 284 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m); 285 286 static void sppp_cp_input(const struct cp *cp, struct sppp *sp, 287 struct mbuf *m); 288 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 289 u_char ident, u_short len, void *data); 290 /* static void sppp_cp_timeout(void *arg); */ 291 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp, 292 int newstate); 293 static void sppp_auth_send(const struct cp *cp, 294 struct sppp *sp, unsigned int type, unsigned int id, 295 ...); 296 297 static void sppp_up_event(const struct cp *cp, struct sppp *sp); 298 static void sppp_down_event(const struct cp *cp, struct sppp *sp); 299 static void sppp_open_event(const struct cp *cp, struct sppp *sp); 300 static void sppp_close_event(const struct cp *cp, struct sppp *sp); 301 static void sppp_to_event(const struct cp *cp, struct sppp *sp); 302 303 static void sppp_null(struct sppp *sp); 304 305 static void sppp_lcp_init(struct sppp *sp); 306 static void sppp_lcp_up(struct sppp *sp); 307 static void sppp_lcp_down(struct sppp *sp); 308 static void sppp_lcp_open(struct sppp *sp); 309 static void sppp_lcp_close(struct sppp *sp); 310 static void sppp_lcp_TO(void *sp); 311 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 312 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 313 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 314 static void sppp_lcp_tlu(struct sppp *sp); 315 static void sppp_lcp_tld(struct sppp *sp); 316 static void sppp_lcp_tls(struct sppp *sp); 317 static void sppp_lcp_tlf(struct sppp *sp); 318 static void sppp_lcp_scr(struct sppp *sp); 319 static void sppp_lcp_check_and_close(struct sppp *sp); 320 static int sppp_ncp_check(struct sppp *sp); 321 322 static void sppp_ipcp_init(struct sppp *sp); 323 static void sppp_ipcp_up(struct sppp *sp); 324 static void sppp_ipcp_down(struct sppp *sp); 325 static void sppp_ipcp_open(struct sppp *sp); 326 static void sppp_ipcp_close(struct sppp *sp); 327 static void sppp_ipcp_TO(void *sp); 328 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 329 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 330 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 331 static void sppp_ipcp_tlu(struct sppp *sp); 332 static void sppp_ipcp_tld(struct sppp *sp); 333 static void sppp_ipcp_tls(struct sppp *sp); 334 static void sppp_ipcp_tlf(struct sppp *sp); 335 static void sppp_ipcp_scr(struct sppp *sp); 336 337 static void sppp_ipv6cp_init(struct sppp *sp); 338 static void sppp_ipv6cp_up(struct sppp *sp); 339 static void sppp_ipv6cp_down(struct sppp *sp); 340 static void sppp_ipv6cp_open(struct sppp *sp); 341 static void sppp_ipv6cp_close(struct sppp *sp); 342 static void sppp_ipv6cp_TO(void *sp); 343 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len); 344 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 345 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 346 static void sppp_ipv6cp_tlu(struct sppp *sp); 347 static void sppp_ipv6cp_tld(struct sppp *sp); 348 static void sppp_ipv6cp_tls(struct sppp *sp); 349 static void sppp_ipv6cp_tlf(struct sppp *sp); 350 static void sppp_ipv6cp_scr(struct sppp *sp); 351 352 static void sppp_pap_input(struct sppp *sp, struct mbuf *m); 353 static void sppp_pap_init(struct sppp *sp); 354 static void sppp_pap_open(struct sppp *sp); 355 static void sppp_pap_close(struct sppp *sp); 356 static void sppp_pap_TO(void *sp); 357 static void sppp_pap_my_TO(void *sp); 358 static void sppp_pap_tlu(struct sppp *sp); 359 static void sppp_pap_tld(struct sppp *sp); 360 static void sppp_pap_scr(struct sppp *sp); 361 362 static void sppp_chap_input(struct sppp *sp, struct mbuf *m); 363 static void sppp_chap_init(struct sppp *sp); 364 static void sppp_chap_open(struct sppp *sp); 365 static void sppp_chap_close(struct sppp *sp); 366 static void sppp_chap_TO(void *sp); 367 static void sppp_chap_tlu(struct sppp *sp); 368 static void sppp_chap_tld(struct sppp *sp); 369 static void sppp_chap_scr(struct sppp *sp); 370 371 static const char *sppp_auth_type_name(u_short proto, u_char type); 372 static const char *sppp_cp_type_name(u_char type); 373 static const char *sppp_dotted_quad(uint32_t addr); 374 static const char *sppp_ipcp_opt_name(u_char opt); 375 #ifdef INET6 376 static const char *sppp_ipv6cp_opt_name(u_char opt); 377 #endif 378 static const char *sppp_lcp_opt_name(u_char opt); 379 static const char *sppp_phase_name(int phase); 380 static const char *sppp_proto_name(u_short proto); 381 static const char *sppp_state_name(int state); 382 static int sppp_params(struct sppp *sp, u_long cmd, void *data); 383 #ifdef INET 384 static void sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, 385 uint32_t *srcmask); 386 static void sppp_set_ip_addrs_work(struct work *wk, struct sppp *sp); 387 static void sppp_set_ip_addrs(struct sppp *sp); 388 static void sppp_clear_ip_addrs_work(struct work *wk, struct sppp *sp); 389 static void sppp_clear_ip_addrs(struct sppp *sp); 390 static void sppp_update_ip_addrs_work(struct work *wk, void *arg); 391 #endif 392 static void sppp_keepalive(void *dummy); 393 static void sppp_phase_network(struct sppp *sp); 394 static void sppp_print_bytes(const u_char *p, u_short len); 395 static void sppp_print_string(const char *p, u_short len); 396 #ifdef INET6 397 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, 398 struct in6_addr *dst, struct in6_addr *srcmask); 399 #ifdef IPV6CP_MYIFID_DYN 400 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src); 401 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src); 402 #endif 403 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src); 404 #endif 405 406 /* our control protocol descriptors */ 407 static const struct cp lcp = { 408 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 409 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close, 410 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak, 411 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf, 412 sppp_lcp_scr 413 }; 414 415 static const struct cp ipcp = { 416 PPP_IPCP, IDX_IPCP, 417 #ifdef INET 418 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 419 #else 420 0, 421 #endif 422 "ipcp", 423 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close, 424 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak, 425 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf, 426 sppp_ipcp_scr 427 }; 428 429 static const struct cp ipv6cp = { 430 PPP_IPV6CP, IDX_IPV6CP, 431 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 432 CP_NCP, 433 #else 434 0, 435 #endif 436 "ipv6cp", 437 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close, 438 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak, 439 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf, 440 sppp_ipv6cp_scr 441 }; 442 443 static const struct cp pap = { 444 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 445 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close, 446 sppp_pap_TO, 0, 0, 0, 447 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null, 448 sppp_pap_scr 449 }; 450 451 static const struct cp chap = { 452 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 453 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close, 454 sppp_chap_TO, 0, 0, 0, 455 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null, 456 sppp_chap_scr 457 }; 458 459 static const struct cp *cps[IDX_COUNT] = { 460 &lcp, /* IDX_LCP */ 461 &ipcp, /* IDX_IPCP */ 462 &ipv6cp, /* IDX_IPV6CP */ 463 &pap, /* IDX_PAP */ 464 &chap, /* IDX_CHAP */ 465 }; 466 467 static void 468 sppp_change_phase(struct sppp *sp, int phase) 469 { 470 STDDCL; 471 472 KASSERT(sppp_locked(sp)); 473 474 if (sp->pp_phase == phase) 475 return; 476 477 sp->pp_phase = phase; 478 479 if (phase == SPPP_PHASE_NETWORK) 480 if_link_state_change(ifp, LINK_STATE_UP); 481 else 482 if_link_state_change(ifp, LINK_STATE_DOWN); 483 484 if (debug) 485 { 486 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 487 sppp_phase_name(sp->pp_phase)); 488 } 489 } 490 491 /* 492 * Exported functions, comprising our interface to the lower layer. 493 */ 494 495 /* 496 * Process the received packet. 497 */ 498 void 499 sppp_input(struct ifnet *ifp, struct mbuf *m) 500 { 501 struct ppp_header *h = NULL; 502 pktqueue_t *pktq = NULL; 503 struct ifqueue *inq = NULL; 504 uint16_t protocol; 505 struct sppp *sp = (struct sppp *)ifp; 506 int debug = ifp->if_flags & IFF_DEBUG; 507 int isr = 0; 508 509 KASSERT(!sppp_locked(sp)); 510 511 sppp_lock_enter(sp); 512 513 if (ifp->if_flags & IFF_UP) { 514 /* Count received bytes, add hardware framing */ 515 ifp->if_ibytes += m->m_pkthdr.len + sp->pp_framebytes; 516 /* Note time of last receive */ 517 sp->pp_last_receive = time_uptime; 518 } 519 520 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 521 /* Too small packet, drop it. */ 522 if (debug) 523 log(LOG_DEBUG, 524 "%s: input packet is too small, %d bytes\n", 525 ifp->if_xname, m->m_pkthdr.len); 526 drop: 527 ++ifp->if_ierrors; 528 ++ifp->if_iqdrops; 529 m_freem(m); 530 sppp_lock_exit(sp); 531 return; 532 } 533 534 if (sp->pp_flags & PP_NOFRAMING) { 535 memcpy(&protocol, mtod(m, void *), 2); 536 protocol = ntohs(protocol); 537 m_adj(m, 2); 538 } else { 539 540 /* Get PPP header. */ 541 h = mtod(m, struct ppp_header *); 542 m_adj(m, PPP_HEADER_LEN); 543 544 switch (h->address) { 545 case PPP_ALLSTATIONS: 546 if (h->control != PPP_UI) 547 goto invalid; 548 if (sp->pp_flags & PP_CISCO) { 549 if (debug) 550 log(LOG_DEBUG, 551 "%s: PPP packet in Cisco mode " 552 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 553 ifp->if_xname, 554 h->address, h->control, ntohs(h->protocol)); 555 goto drop; 556 } 557 break; 558 case CISCO_MULTICAST: 559 case CISCO_UNICAST: 560 /* Don't check the control field here (RFC 1547). */ 561 if (! (sp->pp_flags & PP_CISCO)) { 562 if (debug) 563 log(LOG_DEBUG, 564 "%s: Cisco packet in PPP mode " 565 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 566 ifp->if_xname, 567 h->address, h->control, ntohs(h->protocol)); 568 goto drop; 569 } 570 switch (ntohs(h->protocol)) { 571 default: 572 ++ifp->if_noproto; 573 goto invalid; 574 case CISCO_KEEPALIVE: 575 sppp_lock_exit(sp); 576 sppp_cisco_input((struct sppp *) ifp, m); 577 m_freem(m); 578 return; 579 #ifdef INET 580 case ETHERTYPE_IP: 581 pktq = ip_pktq; 582 break; 583 #endif 584 #ifdef INET6 585 case ETHERTYPE_IPV6: 586 pktq = ip6_pktq; 587 break; 588 #endif 589 } 590 goto queue_pkt; 591 default: /* Invalid PPP packet. */ 592 invalid: 593 if (debug) 594 log(LOG_DEBUG, 595 "%s: invalid input packet " 596 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 597 ifp->if_xname, 598 h->address, h->control, ntohs(h->protocol)); 599 goto drop; 600 } 601 protocol = ntohs(h->protocol); 602 } 603 604 switch (protocol) { 605 default: 606 if (sp->state[IDX_LCP] == STATE_OPENED) { 607 uint16_t prot = htons(protocol); 608 sppp_cp_send(sp, PPP_LCP, PROTO_REJ, 609 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2, 610 &prot); 611 } 612 if (debug) 613 log(LOG_DEBUG, 614 "%s: invalid input protocol " 615 "<proto=0x%x>\n", ifp->if_xname, ntohs(protocol)); 616 ++ifp->if_noproto; 617 goto drop; 618 case PPP_LCP: 619 sppp_lock_exit(sp); 620 sppp_cp_input(&lcp, sp, m); 621 m_freem(m); 622 return; 623 case PPP_PAP: 624 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 625 sppp_lock_exit(sp); 626 sppp_pap_input(sp, m); 627 } else 628 sppp_lock_exit(sp); 629 m_freem(m); 630 return; 631 case PPP_CHAP: 632 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 633 sppp_lock_exit(sp); 634 sppp_chap_input(sp, m); 635 } else 636 sppp_lock_exit(sp); 637 m_freem(m); 638 return; 639 #ifdef INET 640 case PPP_IPCP: 641 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 642 sppp_lock_exit(sp); 643 sppp_cp_input(&ipcp, sp, m); 644 } else 645 sppp_lock_exit(sp); 646 m_freem(m); 647 return; 648 case PPP_IP: 649 if (sp->state[IDX_IPCP] == STATE_OPENED) { 650 sp->pp_last_activity = time_uptime; 651 pktq = ip_pktq; 652 } 653 break; 654 #endif 655 #ifdef INET6 656 case PPP_IPV6CP: 657 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 658 sppp_lock_exit(sp); 659 sppp_cp_input(&ipv6cp, sp, m); 660 } else 661 sppp_lock_exit(sp); 662 m_freem(m); 663 return; 664 665 case PPP_IPV6: 666 if (sp->state[IDX_IPV6CP] == STATE_OPENED) { 667 sp->pp_last_activity = time_uptime; 668 pktq = ip6_pktq; 669 } 670 break; 671 #endif 672 } 673 674 queue_pkt: 675 if ((ifp->if_flags & IFF_UP) == 0 || (!inq && !pktq)) { 676 goto drop; 677 } 678 679 sppp_lock_exit(sp); 680 /* Check queue. */ 681 if (__predict_true(pktq)) { 682 if (__predict_false(!pktq_enqueue(pktq, m, 0))) { 683 sppp_lock_enter(sp); 684 goto drop; 685 } 686 return; 687 } 688 689 IFQ_LOCK(inq); 690 if (IF_QFULL(inq)) { 691 /* Queue overflow. */ 692 IF_DROP(inq); 693 IFQ_UNLOCK(inq); 694 if (debug) 695 log(LOG_DEBUG, "%s: protocol queue overflow\n", 696 ifp->if_xname); 697 sppp_lock_enter(sp); 698 goto drop; 699 } 700 IF_ENQUEUE(inq, m); 701 IFQ_UNLOCK(inq); 702 schednetisr(isr); 703 } 704 705 /* 706 * Enqueue transmit packet. 707 */ 708 static int 709 sppp_output(struct ifnet *ifp, struct mbuf *m, 710 const struct sockaddr *dst, const struct rtentry *rt) 711 { 712 struct sppp *sp = (struct sppp *) ifp; 713 struct ppp_header *h = NULL; 714 #ifndef SPPPSUBR_MPSAFE 715 struct ifqueue *ifq = NULL; /* XXX */ 716 #endif 717 int s, error = 0; 718 uint16_t protocol; 719 size_t pktlen; 720 721 s = splnet(); 722 723 sppp_lock_enter(sp); 724 sp->pp_last_activity = time_uptime; 725 726 if ((ifp->if_flags & IFF_UP) == 0 || 727 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 728 sppp_lock_exit(sp); 729 m_freem(m); 730 splx(s); 731 return (ENETDOWN); 732 } 733 734 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 735 /* 736 * Interface is not yet running, but auto-dial. Need 737 * to start LCP for it. 738 */ 739 ifp->if_flags |= IFF_RUNNING; 740 splx(s); 741 lcp.Open(sp); 742 s = splnet(); 743 } 744 745 /* 746 * If the queueing discipline needs packet classification, 747 * do it before prepending link headers. 748 */ 749 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family); 750 751 #ifdef INET 752 if (dst->sa_family == AF_INET) { 753 struct ip *ip = NULL; 754 #ifndef SPPPSUBR_MPSAFE 755 struct tcphdr *th = NULL; 756 #endif 757 758 if (m->m_len >= sizeof(struct ip)) { 759 ip = mtod(m, struct ip *); 760 #ifndef SPPPSUBR_MPSAFE 761 if (ip->ip_p == IPPROTO_TCP && 762 m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) + 763 sizeof(struct tcphdr)) { 764 th = (struct tcphdr *) 765 ((char *)ip + (ip->ip_hl << 2)); 766 } 767 #endif 768 } else 769 ip = NULL; 770 771 /* 772 * When using dynamic local IP address assignment by using 773 * 0.0.0.0 as a local address, the first TCP session will 774 * not connect because the local TCP checksum is computed 775 * using 0.0.0.0 which will later become our real IP address 776 * so the TCP checksum computed at the remote end will 777 * become invalid. So we 778 * - don't let packets with src ip addr 0 thru 779 * - we flag TCP packets with src ip 0 as an error 780 */ 781 if (ip && ip->ip_src.s_addr == INADDR_ANY) { 782 uint8_t proto = ip->ip_p; 783 784 sppp_lock_exit(sp); 785 m_freem(m); 786 splx(s); 787 if (proto == IPPROTO_TCP) 788 return (EADDRNOTAVAIL); 789 else 790 return (0); 791 } 792 793 #ifndef SPPPSUBR_MPSAFE 794 /* 795 * Put low delay, telnet, rlogin and ftp control packets 796 * in front of the queue. 797 */ 798 if (!IF_QFULL(&sp->pp_fastq) && 799 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || 800 (th && (INTERACTIVE(ntohs(th->th_sport)) || 801 INTERACTIVE(ntohs(th->th_dport)))))) 802 ifq = &sp->pp_fastq; 803 #endif /* !SPPPSUBR_MPSAFE */ 804 } 805 #endif 806 807 #ifdef INET6 808 if (dst->sa_family == AF_INET6) { 809 /* XXX do something tricky here? */ 810 } 811 #endif 812 813 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 814 /* 815 * Prepend general data packet PPP header. For now, IP only. 816 */ 817 M_PREPEND(m, PPP_HEADER_LEN, M_DONTWAIT); 818 if (! m) { 819 if (ifp->if_flags & IFF_DEBUG) 820 log(LOG_DEBUG, "%s: no memory for transmit header\n", 821 ifp->if_xname); 822 ++ifp->if_oerrors; 823 sppp_lock_exit(sp); 824 splx(s); 825 return (ENOBUFS); 826 } 827 /* 828 * May want to check size of packet 829 * (albeit due to the implementation it's always enough) 830 */ 831 h = mtod(m, struct ppp_header *); 832 if (sp->pp_flags & PP_CISCO) { 833 h->address = CISCO_UNICAST; /* unicast address */ 834 h->control = 0; 835 } else { 836 h->address = PPP_ALLSTATIONS; /* broadcast address */ 837 h->control = PPP_UI; /* Unnumbered Info */ 838 } 839 } 840 841 switch (dst->sa_family) { 842 #ifdef INET 843 case AF_INET: /* Internet Protocol */ 844 if (sp->pp_flags & PP_CISCO) 845 protocol = htons(ETHERTYPE_IP); 846 else { 847 /* 848 * Don't choke with an ENETDOWN early. It's 849 * possible that we just started dialing out, 850 * so don't drop the packet immediately. If 851 * we notice that we run out of buffer space 852 * below, we will however remember that we are 853 * not ready to carry IP packets, and return 854 * ENETDOWN, as opposed to ENOBUFS. 855 */ 856 protocol = htons(PPP_IP); 857 if (sp->state[IDX_IPCP] != STATE_OPENED) 858 error = ENETDOWN; 859 } 860 break; 861 #endif 862 #ifdef INET6 863 case AF_INET6: /* Internet Protocol version 6 */ 864 if (sp->pp_flags & PP_CISCO) 865 protocol = htons(ETHERTYPE_IPV6); 866 else { 867 /* 868 * Don't choke with an ENETDOWN early. It's 869 * possible that we just started dialing out, 870 * so don't drop the packet immediately. If 871 * we notice that we run out of buffer space 872 * below, we will however remember that we are 873 * not ready to carry IP packets, and return 874 * ENETDOWN, as opposed to ENOBUFS. 875 */ 876 protocol = htons(PPP_IPV6); 877 if (sp->state[IDX_IPV6CP] != STATE_OPENED) 878 error = ENETDOWN; 879 } 880 break; 881 #endif 882 default: 883 m_freem(m); 884 ++ifp->if_oerrors; 885 sppp_lock_exit(sp); 886 splx(s); 887 return (EAFNOSUPPORT); 888 } 889 890 if (sp->pp_flags & PP_NOFRAMING) { 891 M_PREPEND(m, 2, M_DONTWAIT); 892 if (m == NULL) { 893 if (ifp->if_flags & IFF_DEBUG) 894 log(LOG_DEBUG, "%s: no memory for transmit header\n", 895 ifp->if_xname); 896 ++ifp->if_oerrors; 897 sppp_lock_exit(sp); 898 splx(s); 899 return (ENOBUFS); 900 } 901 *mtod(m, uint16_t *) = protocol; 902 } else { 903 h->protocol = protocol; 904 } 905 906 pktlen = m->m_pkthdr.len; 907 #ifdef SPPPSUBR_MPSAFE 908 error = if_transmit_lock(ifp, m); 909 if (error == 0) 910 ifp->if_obytes += pktlen + sp->pp_framebytes; 911 #else /* !SPPPSUBR_MPSAFE */ 912 error = ifq_enqueue2(ifp, ifq, m); 913 914 if (error == 0) { 915 /* 916 * Count output packets and bytes. 917 * The packet length includes header + additional hardware 918 * framing according to RFC 1333. 919 */ 920 if (!(ifp->if_flags & IFF_OACTIVE)) { 921 sppp_lock_exit(sp); 922 if_start_lock(ifp); 923 sppp_lock_enter(sp); 924 } 925 ifp->if_obytes += pktlen + sp->pp_framebytes; 926 } 927 #endif /* !SPPPSUBR_MPSAFE */ 928 sppp_lock_exit(sp); 929 splx(s); 930 return error; 931 } 932 933 static int 934 sppp_mediachange(struct ifnet *ifp) 935 { 936 937 return (0); 938 } 939 940 static void 941 sppp_mediastatus(struct ifnet *ifp, struct ifmediareq *imr) 942 { 943 struct sppp *sp = (struct sppp *)ifp; 944 KASSERT(!sppp_locked(sp)); 945 946 sppp_lock_enter(sp); 947 switch (ifp->if_link_state) { 948 case LINK_STATE_UP: 949 imr->ifm_status = IFM_AVALID | IFM_ACTIVE; 950 break; 951 case LINK_STATE_DOWN: 952 imr->ifm_status = IFM_AVALID; 953 break; 954 default: 955 /* Should be impossible as we set link state down in attach. */ 956 imr->ifm_status = 0; 957 break; 958 } 959 sppp_lock_exit(sp); 960 } 961 962 void 963 sppp_attach(struct ifnet *ifp) 964 { 965 struct sppp *sp = (struct sppp *) ifp; 966 967 /* Initialize keepalive handler. */ 968 if (! spppq) { 969 callout_init(&keepalive_ch, 0); 970 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 971 } 972 973 if (! spppq_lock) 974 spppq_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_SOFTNET); 975 976 /* Insert new entry into the keepalive list. */ 977 sp->pp_next = spppq; 978 spppq = sp; 979 980 sp->pp_if.if_type = IFT_PPP; 981 sp->pp_if.if_output = sppp_output; 982 sp->pp_fastq.ifq_maxlen = 32; 983 sp->pp_cpq.ifq_maxlen = 20; 984 sp->pp_loopcnt = 0; 985 sp->pp_alivecnt = 0; 986 sp->pp_last_activity = 0; 987 sp->pp_last_receive = 0; 988 sp->pp_maxalive = DEFAULT_MAXALIVECNT; 989 sp->pp_max_noreceive = DEFAULT_NORECV_TIME; 990 sp->pp_idle_timeout = 0; 991 memset(&sp->pp_seq[0], 0, sizeof(sp->pp_seq)); 992 memset(&sp->pp_rseq[0], 0, sizeof(sp->pp_rseq)); 993 sp->pp_auth_failures = 0; 994 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 995 sp->pp_phase = SPPP_PHASE_DEAD; 996 sp->pp_up = lcp.Up; 997 sp->pp_down = lcp.Down; 998 sp->pp_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_SOFTNET); 999 1000 if_alloc_sadl(ifp); 1001 1002 /* Lets not beat about the bush, we know we're down. */ 1003 ifp->if_link_state = LINK_STATE_DOWN; 1004 /* There is no media for PPP, but it's needed to report link status. */ 1005 ifmedia_init(&sp->pp_im, 0, sppp_mediachange, sppp_mediastatus); 1006 1007 memset(&sp->myauth, 0, sizeof sp->myauth); 1008 memset(&sp->hisauth, 0, sizeof sp->hisauth); 1009 sppp_lcp_init(sp); 1010 sppp_ipcp_init(sp); 1011 sppp_ipv6cp_init(sp); 1012 sppp_pap_init(sp); 1013 sppp_chap_init(sp); 1014 } 1015 1016 void 1017 sppp_detach(struct ifnet *ifp) 1018 { 1019 struct sppp **q, *p, *sp = (struct sppp *) ifp; 1020 1021 sppp_lock_enter(sp); 1022 /* Remove the entry from the keepalive list. */ 1023 SPPPQ_LOCK(); 1024 for (q = &spppq; (p = *q); q = &p->pp_next) 1025 if (p == sp) { 1026 *q = p->pp_next; 1027 break; 1028 } 1029 1030 /* to avoid workqueue enqueued */ 1031 atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1); 1032 workqueue_destroy(sp->ipcp.update_addrs_wq); 1033 pcq_destroy(sp->ipcp.update_addrs_q); 1034 1035 /* Stop keepalive handler. */ 1036 if (! spppq) { 1037 callout_stop(&keepalive_ch); 1038 } 1039 SPPPQ_UNLOCK(); 1040 1041 callout_stop(&sp->ch[IDX_LCP]); 1042 callout_stop(&sp->ch[IDX_IPCP]); 1043 callout_stop(&sp->ch[IDX_PAP]); 1044 callout_stop(&sp->ch[IDX_CHAP]); 1045 #ifdef INET6 1046 callout_stop(&sp->ch[IDX_IPV6CP]); 1047 #endif 1048 callout_stop(&sp->pap_my_to_ch); 1049 1050 /* free authentication info */ 1051 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 1052 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 1053 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 1054 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 1055 1056 /* Safety - shouldn't be needed as there is no media to set. */ 1057 ifmedia_delete_instance(&sp->pp_im, IFM_INST_ANY); 1058 1059 sppp_lock_exit(sp); 1060 if (sp->pp_lock) 1061 mutex_obj_free(sp->pp_lock); 1062 1063 } 1064 1065 /* 1066 * Flush the interface output queue. 1067 */ 1068 void 1069 sppp_flush(struct ifnet *ifp) 1070 { 1071 struct sppp *sp = (struct sppp *) ifp; 1072 1073 IFQ_PURGE(&sp->pp_if.if_snd); 1074 IF_PURGE(&sp->pp_fastq); 1075 IF_PURGE(&sp->pp_cpq); 1076 } 1077 1078 /* 1079 * Check if the output queue is empty. 1080 */ 1081 int 1082 sppp_isempty(struct ifnet *ifp) 1083 { 1084 struct sppp *sp = (struct sppp *) ifp; 1085 int empty, s; 1086 1087 KASSERT(!sppp_locked(sp)); 1088 1089 s = splnet(); 1090 sppp_lock_enter(sp); 1091 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1092 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1093 sppp_lock_exit(sp); 1094 splx(s); 1095 return (empty); 1096 } 1097 1098 /* 1099 * Get next packet to send. 1100 */ 1101 struct mbuf * 1102 sppp_dequeue(struct ifnet *ifp) 1103 { 1104 struct sppp *sp = (struct sppp *) ifp; 1105 struct mbuf *m; 1106 int s; 1107 1108 s = splnet(); 1109 sppp_lock_enter(sp); 1110 /* 1111 * Process only the control protocol queue until we have at 1112 * least one NCP open. 1113 * 1114 * Do always serve all three queues in Cisco mode. 1115 */ 1116 IF_DEQUEUE(&sp->pp_cpq, m); 1117 if (m == NULL && 1118 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { 1119 IF_DEQUEUE(&sp->pp_fastq, m); 1120 if (m == NULL) 1121 IFQ_DEQUEUE(&sp->pp_if.if_snd, m); 1122 } 1123 sppp_lock_exit(sp); 1124 splx(s); 1125 return m; 1126 } 1127 1128 /* 1129 * Process an ioctl request. Called on low priority level. 1130 */ 1131 int 1132 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1133 { 1134 struct lwp *l = curlwp; /* XXX */ 1135 struct ifreq *ifr = (struct ifreq *) data; 1136 struct ifaddr *ifa = (struct ifaddr *) data; 1137 struct sppp *sp = (struct sppp *) ifp; 1138 int s, error=0, going_up, going_down, newmode; 1139 1140 s = splnet(); 1141 switch (cmd) { 1142 case SIOCINITIFADDR: 1143 ifa->ifa_rtrequest = p2p_rtrequest; 1144 break; 1145 1146 case SIOCSIFFLAGS: 1147 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1148 break; 1149 1150 sppp_lock_enter(sp); 1151 going_up = ifp->if_flags & IFF_UP && 1152 (ifp->if_flags & IFF_RUNNING) == 0; 1153 going_down = (ifp->if_flags & IFF_UP) == 0 && 1154 ifp->if_flags & IFF_RUNNING; 1155 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1156 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1157 /* sanity */ 1158 newmode = IFF_PASSIVE; 1159 ifp->if_flags &= ~IFF_AUTO; 1160 } 1161 1162 if (going_up || going_down) { 1163 lcp.Close(sp); 1164 } 1165 if (going_up && newmode == 0) { 1166 /* neither auto-dial nor passive */ 1167 ifp->if_flags |= IFF_RUNNING; 1168 if (!(sp->pp_flags & PP_CISCO)) 1169 lcp.Open(sp); 1170 } else if (going_down) { 1171 sppp_flush(ifp); 1172 ifp->if_flags &= ~IFF_RUNNING; 1173 } 1174 sppp_lock_exit(sp); 1175 break; 1176 1177 case SIOCSIFMTU: 1178 if (ifr->ifr_mtu < PPP_MINMRU || 1179 ifr->ifr_mtu > sp->lcp.their_mru) { 1180 error = EINVAL; 1181 break; 1182 } 1183 /*FALLTHROUGH*/ 1184 case SIOCGIFMTU: 1185 if ((error = ifioctl_common(ifp, cmd, data)) == ENETRESET) 1186 error = 0; 1187 break; 1188 case SIOCADDMULTI: 1189 case SIOCDELMULTI: 1190 break; 1191 1192 case SPPPSETAUTHCFG: 1193 case SPPPSETLCPCFG: 1194 case SPPPSETIDLETO: 1195 case SPPPSETAUTHFAILURE: 1196 case SPPPSETDNSOPTS: 1197 case SPPPSETKEEPALIVE: 1198 #if defined(COMPAT_50) || defined(MODULAR) 1199 case __SPPPSETIDLETO50: 1200 case __SPPPSETKEEPALIVE50: 1201 #endif /* COMPAT_50 || MODULAR */ 1202 error = kauth_authorize_network(l->l_cred, 1203 KAUTH_NETWORK_INTERFACE, 1204 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd, 1205 NULL); 1206 if (error) 1207 break; 1208 error = sppp_params(sp, cmd, data); 1209 break; 1210 1211 case SPPPGETAUTHCFG: 1212 case SPPPGETLCPCFG: 1213 case SPPPGETAUTHFAILURES: 1214 error = kauth_authorize_network(l->l_cred, 1215 KAUTH_NETWORK_INTERFACE, 1216 KAUTH_REQ_NETWORK_INTERFACE_GETPRIV, ifp, (void *)cmd, 1217 NULL); 1218 if (error) 1219 break; 1220 error = sppp_params(sp, cmd, data); 1221 break; 1222 1223 case SPPPGETSTATUS: 1224 case SPPPGETSTATUSNCP: 1225 case SPPPGETIDLETO: 1226 case SPPPGETDNSOPTS: 1227 case SPPPGETDNSADDRS: 1228 case SPPPGETKEEPALIVE: 1229 #if defined(COMPAT_50) || defined(MODULAR) 1230 case __SPPPGETIDLETO50: 1231 case __SPPPGETKEEPALIVE50: 1232 #endif /* COMPAT_50 || MODULAR */ 1233 error = sppp_params(sp, cmd, data); 1234 break; 1235 1236 case SIOCGIFMEDIA: 1237 error = ifmedia_ioctl(ifp, ifr, &sp->pp_im, cmd); 1238 break; 1239 1240 default: 1241 error = ifioctl_common(ifp, cmd, data); 1242 break; 1243 } 1244 splx(s); 1245 return (error); 1246 } 1247 1248 1249 /* 1250 * Cisco framing implementation. 1251 */ 1252 1253 /* 1254 * Handle incoming Cisco keepalive protocol packets. 1255 */ 1256 static void 1257 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1258 { 1259 STDDCL; 1260 struct cisco_packet *h; 1261 #ifdef INET 1262 uint32_t me, mymask = 0; /* XXX: GCC */ 1263 #endif 1264 1265 KASSERT(!sppp_locked(sp)); 1266 1267 sppp_lock_enter(sp); 1268 1269 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1270 if (debug) 1271 log(LOG_DEBUG, 1272 "%s: cisco invalid packet length: %d bytes\n", 1273 ifp->if_xname, m->m_pkthdr.len); 1274 sppp_lock_exit(sp); 1275 return; 1276 } 1277 h = mtod(m, struct cisco_packet *); 1278 if (debug) 1279 log(LOG_DEBUG, 1280 "%s: cisco input: %d bytes " 1281 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1282 ifp->if_xname, m->m_pkthdr.len, 1283 ntohl(h->type), h->par1, h->par2, (u_int)h->rel, 1284 (u_int)h->time0, (u_int)h->time1); 1285 switch (ntohl(h->type)) { 1286 default: 1287 if (debug) 1288 addlog("%s: cisco unknown packet type: 0x%x\n", 1289 ifp->if_xname, ntohl(h->type)); 1290 break; 1291 case CISCO_ADDR_REPLY: 1292 /* Reply on address request, ignore */ 1293 break; 1294 case CISCO_KEEPALIVE_REQ: 1295 sp->pp_alivecnt = 0; 1296 sp->pp_rseq[IDX_LCP] = ntohl(h->par1); 1297 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 1298 /* Local and remote sequence numbers are equal. 1299 * Probably, the line is in loopback mode. */ 1300 if (sp->pp_loopcnt >= LOOPALIVECNT) { 1301 printf ("%s: loopback\n", 1302 ifp->if_xname); 1303 sp->pp_loopcnt = 0; 1304 if (ifp->if_flags & IFF_UP) { 1305 sppp_lock_exit(sp); 1306 if_down(ifp); 1307 sppp_lock_enter(sp); 1308 IF_PURGE(&sp->pp_cpq); 1309 } 1310 } 1311 ++sp->pp_loopcnt; 1312 1313 /* Generate new local sequence number */ 1314 sp->pp_seq[IDX_LCP] = cprng_fast32(); 1315 break; 1316 } 1317 sp->pp_loopcnt = 0; 1318 if (! (ifp->if_flags & IFF_UP) && 1319 (ifp->if_flags & IFF_RUNNING)) { 1320 sppp_lock_exit(sp); 1321 if_up(ifp); 1322 sppp_lock_enter(sp); 1323 } 1324 break; 1325 case CISCO_ADDR_REQ: 1326 #ifdef INET 1327 sppp_lock_exit(sp); 1328 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1329 if (me != 0L) 1330 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1331 #endif 1332 sppp_lock_enter(sp); 1333 break; 1334 } 1335 sppp_lock_exit(sp); 1336 } 1337 1338 /* 1339 * Send Cisco keepalive packet. 1340 */ 1341 static void 1342 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1343 { 1344 STDDCL; 1345 struct ppp_header *h; 1346 struct cisco_packet *ch; 1347 struct mbuf *m; 1348 uint32_t t; 1349 1350 KASSERT(sppp_locked(sp)); 1351 1352 t = time_uptime * 1000; 1353 MGETHDR(m, M_DONTWAIT, MT_DATA); 1354 if (! m) 1355 return; 1356 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1357 m_reset_rcvif(m); 1358 1359 h = mtod(m, struct ppp_header *); 1360 h->address = CISCO_MULTICAST; 1361 h->control = 0; 1362 h->protocol = htons(CISCO_KEEPALIVE); 1363 1364 ch = (struct cisco_packet *)(h + 1); 1365 ch->type = htonl(type); 1366 ch->par1 = htonl(par1); 1367 ch->par2 = htonl(par2); 1368 ch->rel = -1; 1369 1370 ch->time0 = htons((u_short)(t >> 16)); 1371 ch->time1 = htons((u_short) t); 1372 1373 if (debug) 1374 log(LOG_DEBUG, 1375 "%s: cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1376 ifp->if_xname, ntohl(ch->type), ch->par1, 1377 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1378 (u_int)ch->time1); 1379 1380 if (IF_QFULL(&sp->pp_cpq)) { 1381 IF_DROP(&sp->pp_fastq); 1382 IF_DROP(&ifp->if_snd); 1383 m_freem(m); 1384 ++ifp->if_oerrors; 1385 return; 1386 } 1387 1388 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1389 IF_ENQUEUE(&sp->pp_cpq, m); 1390 1391 if (! (ifp->if_flags & IFF_OACTIVE)) { 1392 sppp_lock_exit(sp); 1393 if_start_lock(ifp); 1394 sppp_lock_enter(sp); 1395 } 1396 } 1397 1398 /* 1399 * PPP protocol implementation. 1400 */ 1401 1402 /* 1403 * Send PPP control protocol packet. 1404 */ 1405 static void 1406 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1407 u_char ident, u_short len, void *data) 1408 { 1409 STDDCL; 1410 struct lcp_header *lh; 1411 struct mbuf *m; 1412 size_t pkthdrlen; 1413 1414 KASSERT(sppp_locked(sp)); 1415 1416 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1417 1418 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1419 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1420 MGETHDR(m, M_DONTWAIT, MT_DATA); 1421 if (! m) 1422 return; 1423 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1424 m_reset_rcvif(m); 1425 1426 if (sp->pp_flags & PP_NOFRAMING) { 1427 *mtod(m, uint16_t *) = htons(proto); 1428 lh = (struct lcp_header *)(mtod(m, uint8_t *) + 2); 1429 } else { 1430 struct ppp_header *h; 1431 h = mtod(m, struct ppp_header *); 1432 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1433 h->control = PPP_UI; /* Unnumbered Info */ 1434 h->protocol = htons(proto); /* Link Control Protocol */ 1435 lh = (struct lcp_header *)(h + 1); 1436 } 1437 lh->type = type; 1438 lh->ident = ident; 1439 lh->len = htons(LCP_HEADER_LEN + len); 1440 if (len) 1441 memcpy(lh + 1, data, len); 1442 1443 if (debug) { 1444 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 1445 ifp->if_xname, 1446 sppp_proto_name(proto), 1447 sppp_cp_type_name(lh->type), lh->ident, ntohs(lh->len)); 1448 if (len) 1449 sppp_print_bytes((u_char *)(lh + 1), len); 1450 addlog(">\n"); 1451 } 1452 if (IF_QFULL(&sp->pp_cpq)) { 1453 IF_DROP(&sp->pp_fastq); 1454 IF_DROP(&ifp->if_snd); 1455 m_freem(m); 1456 ++ifp->if_oerrors; 1457 return; 1458 } 1459 1460 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1461 IF_ENQUEUE(&sp->pp_cpq, m); 1462 1463 if (! (ifp->if_flags & IFF_OACTIVE)) { 1464 sppp_lock_exit(sp); 1465 if_start_lock(ifp); 1466 sppp_lock_enter(sp); 1467 } 1468 } 1469 1470 /* 1471 * Handle incoming PPP control protocol packets. 1472 */ 1473 static void 1474 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1475 { 1476 STDDCL; 1477 struct lcp_header *h; 1478 int printlen, len = m->m_pkthdr.len; 1479 int rv; 1480 u_char *p; 1481 uint32_t u32; 1482 1483 KASSERT(!sppp_locked(sp)); 1484 if (len < 4) { 1485 if (debug) 1486 log(LOG_DEBUG, 1487 "%s: %s invalid packet length: %d bytes\n", 1488 ifp->if_xname, cp->name, len); 1489 return; 1490 } 1491 h = mtod(m, struct lcp_header *); 1492 if (debug) { 1493 printlen = ntohs(h->len); 1494 log(LOG_DEBUG, 1495 "%s: %s input(%s): <%s id=0x%x len=%d", 1496 ifp->if_xname, cp->name, 1497 sppp_state_name(sp->state[cp->protoidx]), 1498 sppp_cp_type_name(h->type), h->ident, printlen); 1499 if (len < printlen) 1500 printlen = len; 1501 if (printlen > 4) 1502 sppp_print_bytes((u_char *)(h + 1), printlen - 4); 1503 addlog(">\n"); 1504 } 1505 if (len > ntohs(h->len)) 1506 len = ntohs(h->len); 1507 p = (u_char *)(h + 1); 1508 switch (h->type) { 1509 case CONF_REQ: 1510 if (len < 4) { 1511 if (debug) 1512 addlog("%s: %s invalid conf-req length %d\n", 1513 ifp->if_xname, cp->name, 1514 len); 1515 sppp_lock_enter(sp); 1516 ++ifp->if_ierrors; 1517 sppp_lock_exit(sp); 1518 break; 1519 } 1520 /* handle states where RCR doesn't get a SCA/SCN */ 1521 sppp_lock_enter(sp); 1522 switch (sp->state[cp->protoidx]) { 1523 case STATE_CLOSING: 1524 case STATE_STOPPING: 1525 sppp_lock_exit(sp); 1526 return; 1527 case STATE_CLOSED: 1528 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1529 0, 0); 1530 sppp_lock_exit(sp); 1531 return; 1532 } 1533 rv = (cp->RCR)(sp, h, len); 1534 if (rv < 0) { 1535 /* fatal error, shut down */ 1536 (cp->tld)(sp); 1537 sppp_lcp_tlf(sp); 1538 sppp_lock_exit(sp); 1539 return; 1540 } 1541 switch (sp->state[cp->protoidx]) { 1542 case STATE_OPENED: 1543 (cp->tld)(sp); 1544 (cp->scr)(sp); 1545 /* fall through... */ 1546 case STATE_ACK_SENT: 1547 case STATE_REQ_SENT: 1548 sppp_cp_change_state(cp, sp, rv? 1549 STATE_ACK_SENT: STATE_REQ_SENT); 1550 break; 1551 case STATE_STOPPED: 1552 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1553 (cp->scr)(sp); 1554 sppp_cp_change_state(cp, sp, rv? 1555 STATE_ACK_SENT: STATE_REQ_SENT); 1556 break; 1557 case STATE_ACK_RCVD: 1558 if (rv) { 1559 sppp_cp_change_state(cp, sp, STATE_OPENED); 1560 if (debug) 1561 log(LOG_DEBUG, "%s: %s tlu\n", 1562 ifp->if_xname, 1563 cp->name); 1564 (cp->tlu)(sp); 1565 } else 1566 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1567 break; 1568 default: 1569 sppp_lock_enter(sp); 1570 printf("%s: %s illegal %s in state %s\n", 1571 ifp->if_xname, cp->name, 1572 sppp_cp_type_name(h->type), 1573 sppp_state_name(sp->state[cp->protoidx])); 1574 ++ifp->if_ierrors; 1575 } 1576 sppp_lock_exit(sp); 1577 break; 1578 case CONF_ACK: 1579 sppp_lock_enter(sp); 1580 if (h->ident != sp->confid[cp->protoidx]) { 1581 if (debug) 1582 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1583 ifp->if_xname, cp->name, 1584 h->ident, sp->confid[cp->protoidx]); 1585 ++ifp->if_ierrors; 1586 sppp_lock_exit(sp); 1587 break; 1588 } 1589 switch (sp->state[cp->protoidx]) { 1590 case STATE_CLOSED: 1591 case STATE_STOPPED: 1592 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1593 break; 1594 case STATE_CLOSING: 1595 case STATE_STOPPING: 1596 break; 1597 case STATE_REQ_SENT: 1598 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1599 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1600 break; 1601 case STATE_OPENED: 1602 (cp->tld)(sp); 1603 /* fall through */ 1604 case STATE_ACK_RCVD: 1605 (cp->scr)(sp); 1606 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1607 break; 1608 case STATE_ACK_SENT: 1609 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1610 sppp_cp_change_state(cp, sp, STATE_OPENED); 1611 if (debug) 1612 log(LOG_DEBUG, "%s: %s tlu\n", 1613 ifp->if_xname, cp->name); 1614 (cp->tlu)(sp); 1615 break; 1616 default: 1617 printf("%s: %s illegal %s in state %s\n", 1618 ifp->if_xname, cp->name, 1619 sppp_cp_type_name(h->type), 1620 sppp_state_name(sp->state[cp->protoidx])); 1621 ++ifp->if_ierrors; 1622 } 1623 sppp_lock_exit(sp); 1624 break; 1625 case CONF_NAK: 1626 case CONF_REJ: 1627 sppp_lock_enter(sp); 1628 if (h->ident != sp->confid[cp->protoidx]) { 1629 if (debug) 1630 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1631 ifp->if_xname, cp->name, 1632 h->ident, sp->confid[cp->protoidx]); 1633 ++ifp->if_ierrors; 1634 sppp_lock_exit(sp); 1635 break; 1636 } 1637 if (h->type == CONF_NAK) 1638 (cp->RCN_nak)(sp, h, len); 1639 else /* CONF_REJ */ 1640 (cp->RCN_rej)(sp, h, len); 1641 1642 switch (sp->state[cp->protoidx]) { 1643 case STATE_CLOSED: 1644 case STATE_STOPPED: 1645 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1646 break; 1647 case STATE_REQ_SENT: 1648 case STATE_ACK_SENT: 1649 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1650 (cp->scr)(sp); 1651 break; 1652 case STATE_OPENED: 1653 (cp->tld)(sp); 1654 /* fall through */ 1655 case STATE_ACK_RCVD: 1656 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1657 (cp->scr)(sp); 1658 break; 1659 case STATE_CLOSING: 1660 case STATE_STOPPING: 1661 break; 1662 default: 1663 printf("%s: %s illegal %s in state %s\n", 1664 ifp->if_xname, cp->name, 1665 sppp_cp_type_name(h->type), 1666 sppp_state_name(sp->state[cp->protoidx])); 1667 ++ifp->if_ierrors; 1668 } 1669 sppp_lock_exit(sp); 1670 break; 1671 1672 case TERM_REQ: 1673 sppp_lock_enter(sp); 1674 switch (sp->state[cp->protoidx]) { 1675 case STATE_ACK_RCVD: 1676 case STATE_ACK_SENT: 1677 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1678 /* fall through */ 1679 case STATE_CLOSED: 1680 case STATE_STOPPED: 1681 case STATE_CLOSING: 1682 case STATE_STOPPING: 1683 case STATE_REQ_SENT: 1684 sta: 1685 /* Send Terminate-Ack packet. */ 1686 if (debug) 1687 log(LOG_DEBUG, "%s: %s send terminate-ack\n", 1688 ifp->if_xname, cp->name); 1689 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1690 break; 1691 case STATE_OPENED: 1692 (cp->tld)(sp); 1693 sp->rst_counter[cp->protoidx] = 0; 1694 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1695 goto sta; 1696 default: 1697 printf("%s: %s illegal %s in state %s\n", 1698 ifp->if_xname, cp->name, 1699 sppp_cp_type_name(h->type), 1700 sppp_state_name(sp->state[cp->protoidx])); 1701 ++ifp->if_ierrors; 1702 } 1703 sppp_lock_exit(sp); 1704 break; 1705 case TERM_ACK: 1706 sppp_lock_enter(sp); 1707 switch (sp->state[cp->protoidx]) { 1708 case STATE_CLOSED: 1709 case STATE_STOPPED: 1710 case STATE_REQ_SENT: 1711 case STATE_ACK_SENT: 1712 break; 1713 case STATE_CLOSING: 1714 (cp->tlf)(sp); 1715 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1716 sppp_lcp_check_and_close(sp); 1717 break; 1718 case STATE_STOPPING: 1719 (cp->tlf)(sp); 1720 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1721 sppp_lcp_check_and_close(sp); 1722 break; 1723 case STATE_ACK_RCVD: 1724 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1725 break; 1726 case STATE_OPENED: 1727 (cp->tld)(sp); 1728 (cp->scr)(sp); 1729 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1730 break; 1731 default: 1732 printf("%s: %s illegal %s in state %s\n", 1733 ifp->if_xname, cp->name, 1734 sppp_cp_type_name(h->type), 1735 sppp_state_name(sp->state[cp->protoidx])); 1736 ++ifp->if_ierrors; 1737 } 1738 sppp_lock_exit(sp); 1739 break; 1740 case CODE_REJ: 1741 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1742 sppp_lock_enter(sp); 1743 log(LOG_INFO, 1744 "%s: %s: ignoring RXJ (%s) for code ?, " 1745 "danger will robinson\n", 1746 ifp->if_xname, cp->name, 1747 sppp_cp_type_name(h->type)); 1748 switch (sp->state[cp->protoidx]) { 1749 case STATE_CLOSED: 1750 case STATE_STOPPED: 1751 case STATE_REQ_SENT: 1752 case STATE_ACK_SENT: 1753 case STATE_CLOSING: 1754 case STATE_STOPPING: 1755 case STATE_OPENED: 1756 break; 1757 case STATE_ACK_RCVD: 1758 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1759 break; 1760 default: 1761 printf("%s: %s illegal %s in state %s\n", 1762 ifp->if_xname, cp->name, 1763 sppp_cp_type_name(h->type), 1764 sppp_state_name(sp->state[cp->protoidx])); 1765 ++ifp->if_ierrors; 1766 } 1767 sppp_lock_exit(sp); 1768 break; 1769 case PROTO_REJ: 1770 { 1771 int catastrophic; 1772 const struct cp *upper; 1773 int i; 1774 uint16_t proto; 1775 1776 catastrophic = 0; 1777 upper = NULL; 1778 proto = p[0] << 8 | p[1]; 1779 for (i = 0; i < IDX_COUNT; i++) { 1780 if (cps[i]->proto == proto) { 1781 upper = cps[i]; 1782 break; 1783 } 1784 } 1785 if (upper == NULL) 1786 catastrophic++; 1787 1788 sppp_lock_enter(sp); 1789 1790 if (debug) 1791 log(LOG_INFO, 1792 "%s: %s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1793 ifp->if_xname, cp->name, catastrophic ? '-' : '+', 1794 sppp_cp_type_name(h->type), proto, 1795 upper ? upper->name : "unknown", 1796 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1797 1798 /* 1799 * if we got RXJ+ against conf-req, the peer does not implement 1800 * this particular protocol type. terminate the protocol. 1801 */ 1802 if (upper && !catastrophic) { 1803 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1804 upper->Close(sp); 1805 sppp_lock_exit(sp); 1806 break; 1807 } 1808 } 1809 1810 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1811 switch (sp->state[cp->protoidx]) { 1812 case STATE_CLOSED: 1813 case STATE_STOPPED: 1814 case STATE_REQ_SENT: 1815 case STATE_ACK_SENT: 1816 case STATE_CLOSING: 1817 case STATE_STOPPING: 1818 case STATE_OPENED: 1819 break; 1820 case STATE_ACK_RCVD: 1821 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1822 break; 1823 default: 1824 printf("%s: %s illegal %s in state %s\n", 1825 ifp->if_xname, cp->name, 1826 sppp_cp_type_name(h->type), 1827 sppp_state_name(sp->state[cp->protoidx])); 1828 ++ifp->if_ierrors; 1829 } 1830 sppp_lock_exit(sp); 1831 break; 1832 } 1833 case DISC_REQ: 1834 if (cp->proto != PPP_LCP) 1835 goto illegal; 1836 /* Discard the packet. */ 1837 break; 1838 case ECHO_REQ: 1839 if (cp->proto != PPP_LCP) 1840 goto illegal; 1841 sppp_lock_enter(sp); 1842 if (sp->state[cp->protoidx] != STATE_OPENED) { 1843 if (debug) 1844 addlog("%s: lcp echo req but lcp closed\n", 1845 ifp->if_xname); 1846 ++ifp->if_ierrors; 1847 sppp_lock_exit(sp); 1848 break; 1849 } 1850 if (len < 8) { 1851 if (debug) 1852 addlog("%s: invalid lcp echo request " 1853 "packet length: %d bytes\n", 1854 ifp->if_xname, len); 1855 sppp_lock_exit(sp); 1856 break; 1857 } 1858 memcpy(&u32, h + 1, sizeof u32); 1859 if (ntohl(u32) == sp->lcp.magic) { 1860 /* Line loopback mode detected. */ 1861 printf("%s: loopback\n", ifp->if_xname); 1862 if_down(ifp); 1863 IF_PURGE(&sp->pp_cpq); 1864 1865 /* Shut down the PPP link. */ 1866 /* XXX */ 1867 lcp.Down(sp); 1868 lcp.Up(sp); 1869 sppp_lock_exit(sp); 1870 break; 1871 } 1872 u32 = htonl(sp->lcp.magic); 1873 memcpy(h + 1, &u32, sizeof u32); 1874 if (debug) 1875 addlog("%s: got lcp echo req, sending echo rep\n", 1876 ifp->if_xname); 1877 sppp_cp_send(sp, PPP_LCP, ECHO_REPLY, h->ident, len - 4, 1878 h + 1); 1879 sppp_lock_exit(sp); 1880 break; 1881 case ECHO_REPLY: 1882 if (cp->proto != PPP_LCP) 1883 goto illegal; 1884 sppp_lock_enter(sp); 1885 if (h->ident != sp->lcp.echoid) { 1886 ++ifp->if_ierrors; 1887 sppp_lock_exit(sp); 1888 break; 1889 } 1890 if (len < 8) { 1891 if (debug) 1892 addlog("%s: lcp invalid echo reply " 1893 "packet length: %d bytes\n", 1894 ifp->if_xname, len); 1895 sppp_lock_exit(sp); 1896 break; 1897 } 1898 if (debug) 1899 addlog("%s: lcp got echo rep\n", 1900 ifp->if_xname); 1901 memcpy(&u32, h + 1, sizeof u32); 1902 if (ntohl(u32) != sp->lcp.magic) 1903 sp->pp_alivecnt = 0; 1904 sppp_lock_exit(sp); 1905 break; 1906 default: 1907 /* Unknown packet type -- send Code-Reject packet. */ 1908 illegal: 1909 sppp_lock_enter(sp); 1910 if (debug) 1911 addlog("%s: %s send code-rej for 0x%x\n", 1912 ifp->if_xname, cp->name, h->type); 1913 sppp_cp_send(sp, cp->proto, CODE_REJ, 1914 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 1915 ++ifp->if_ierrors; 1916 sppp_lock_exit(sp); 1917 } 1918 } 1919 1920 1921 /* 1922 * The generic part of all Up/Down/Open/Close/TO event handlers. 1923 * Basically, the state transition handling in the automaton. 1924 */ 1925 static void 1926 sppp_up_event(const struct cp *cp, struct sppp *sp) 1927 { 1928 STDDCL; 1929 1930 KASSERT(sppp_locked(sp)); 1931 1932 if (debug) 1933 log(LOG_DEBUG, "%s: %s up(%s)\n", 1934 ifp->if_xname, cp->name, 1935 sppp_state_name(sp->state[cp->protoidx])); 1936 1937 switch (sp->state[cp->protoidx]) { 1938 case STATE_INITIAL: 1939 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1940 break; 1941 case STATE_STARTING: 1942 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1943 (cp->scr)(sp); 1944 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1945 break; 1946 default: 1947 printf("%s: %s illegal up in state %s\n", 1948 ifp->if_xname, cp->name, 1949 sppp_state_name(sp->state[cp->protoidx])); 1950 } 1951 } 1952 1953 static void 1954 sppp_down_event(const struct cp *cp, struct sppp *sp) 1955 { 1956 STDDCL; 1957 1958 KASSERT(sppp_locked(sp)); 1959 1960 if (debug) 1961 log(LOG_DEBUG, "%s: %s down(%s)\n", 1962 ifp->if_xname, cp->name, 1963 sppp_state_name(sp->state[cp->protoidx])); 1964 1965 switch (sp->state[cp->protoidx]) { 1966 case STATE_CLOSED: 1967 case STATE_CLOSING: 1968 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1969 break; 1970 case STATE_STOPPED: 1971 (cp->tls)(sp); 1972 /* fall through */ 1973 case STATE_STOPPING: 1974 case STATE_REQ_SENT: 1975 case STATE_ACK_RCVD: 1976 case STATE_ACK_SENT: 1977 sppp_cp_change_state(cp, sp, STATE_STARTING); 1978 break; 1979 case STATE_OPENED: 1980 (cp->tld)(sp); 1981 sppp_cp_change_state(cp, sp, STATE_STARTING); 1982 break; 1983 default: 1984 printf("%s: %s illegal down in state %s\n", 1985 ifp->if_xname, cp->name, 1986 sppp_state_name(sp->state[cp->protoidx])); 1987 } 1988 } 1989 1990 1991 static void 1992 sppp_open_event(const struct cp *cp, struct sppp *sp) 1993 { 1994 STDDCL; 1995 1996 KASSERT(sppp_locked(sp)); 1997 1998 if (debug) 1999 log(LOG_DEBUG, "%s: %s open(%s)\n", 2000 ifp->if_xname, cp->name, 2001 sppp_state_name(sp->state[cp->protoidx])); 2002 2003 switch (sp->state[cp->protoidx]) { 2004 case STATE_INITIAL: 2005 sppp_cp_change_state(cp, sp, STATE_STARTING); 2006 (cp->tls)(sp); 2007 break; 2008 case STATE_STARTING: 2009 break; 2010 case STATE_CLOSED: 2011 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 2012 (cp->scr)(sp); 2013 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2014 break; 2015 case STATE_STOPPED: 2016 case STATE_STOPPING: 2017 case STATE_REQ_SENT: 2018 case STATE_ACK_RCVD: 2019 case STATE_ACK_SENT: 2020 case STATE_OPENED: 2021 break; 2022 case STATE_CLOSING: 2023 sppp_cp_change_state(cp, sp, STATE_STOPPING); 2024 break; 2025 } 2026 } 2027 2028 2029 static void 2030 sppp_close_event(const struct cp *cp, struct sppp *sp) 2031 { 2032 STDDCL; 2033 2034 KASSERT(sppp_locked(sp)); 2035 2036 if (debug) 2037 log(LOG_DEBUG, "%s: %s close(%s)\n", 2038 ifp->if_xname, cp->name, 2039 sppp_state_name(sp->state[cp->protoidx])); 2040 2041 switch (sp->state[cp->protoidx]) { 2042 case STATE_INITIAL: 2043 case STATE_CLOSED: 2044 case STATE_CLOSING: 2045 break; 2046 case STATE_STARTING: 2047 sppp_cp_change_state(cp, sp, STATE_INITIAL); 2048 (cp->tlf)(sp); 2049 break; 2050 case STATE_STOPPED: 2051 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2052 break; 2053 case STATE_STOPPING: 2054 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2055 break; 2056 case STATE_OPENED: 2057 (cp->tld)(sp); 2058 /* fall through */ 2059 case STATE_REQ_SENT: 2060 case STATE_ACK_RCVD: 2061 case STATE_ACK_SENT: 2062 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 2063 sppp_cp_send(sp, cp->proto, TERM_REQ, 2064 ++sp->pp_seq[cp->protoidx], 0, 0); 2065 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2066 break; 2067 } 2068 } 2069 2070 static void 2071 sppp_to_event(const struct cp *cp, struct sppp *sp) 2072 { 2073 STDDCL; 2074 int s; 2075 2076 KASSERT(sppp_locked(sp)); 2077 2078 s = splnet(); 2079 2080 if (debug) 2081 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 2082 ifp->if_xname, cp->name, 2083 sppp_state_name(sp->state[cp->protoidx]), 2084 sp->rst_counter[cp->protoidx]); 2085 2086 if (--sp->rst_counter[cp->protoidx] < 0) 2087 /* TO- event */ 2088 switch (sp->state[cp->protoidx]) { 2089 case STATE_CLOSING: 2090 (cp->tlf)(sp); 2091 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2092 sppp_lcp_check_and_close(sp); 2093 break; 2094 case STATE_STOPPING: 2095 (cp->tlf)(sp); 2096 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2097 sppp_lcp_check_and_close(sp); 2098 break; 2099 case STATE_REQ_SENT: 2100 case STATE_ACK_RCVD: 2101 case STATE_ACK_SENT: 2102 (cp->tlf)(sp); 2103 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2104 sppp_lcp_check_and_close(sp); 2105 break; 2106 } 2107 else 2108 /* TO+ event */ 2109 switch (sp->state[cp->protoidx]) { 2110 case STATE_CLOSING: 2111 case STATE_STOPPING: 2112 sppp_cp_send(sp, cp->proto, TERM_REQ, 2113 ++sp->pp_seq[cp->protoidx], 0, 0); 2114 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 2115 cp->TO, sp); 2116 break; 2117 case STATE_REQ_SENT: 2118 case STATE_ACK_RCVD: 2119 (cp->scr)(sp); 2120 /* sppp_cp_change_state() will restart the timer */ 2121 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2122 break; 2123 case STATE_ACK_SENT: 2124 (cp->scr)(sp); 2125 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 2126 cp->TO, sp); 2127 break; 2128 } 2129 2130 splx(s); 2131 } 2132 2133 /* 2134 * Change the state of a control protocol in the state automaton. 2135 * Takes care of starting/stopping the restart timer. 2136 */ 2137 void 2138 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 2139 { 2140 KASSERT(sppp_locked(sp)); 2141 2142 sp->state[cp->protoidx] = newstate; 2143 callout_stop(&sp->ch[cp->protoidx]); 2144 switch (newstate) { 2145 case STATE_INITIAL: 2146 case STATE_STARTING: 2147 case STATE_CLOSED: 2148 case STATE_STOPPED: 2149 case STATE_OPENED: 2150 break; 2151 case STATE_CLOSING: 2152 case STATE_STOPPING: 2153 case STATE_REQ_SENT: 2154 case STATE_ACK_RCVD: 2155 case STATE_ACK_SENT: 2156 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 2157 cp->TO, sp); 2158 break; 2159 } 2160 } 2161 2162 /* 2163 *--------------------------------------------------------------------------* 2164 * * 2165 * The LCP implementation. * 2166 * * 2167 *--------------------------------------------------------------------------* 2168 */ 2169 static void 2170 sppp_lcp_init(struct sppp *sp) 2171 { 2172 sppp_lock_enter(sp); 2173 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 2174 sp->lcp.magic = 0; 2175 sp->state[IDX_LCP] = STATE_INITIAL; 2176 sp->fail_counter[IDX_LCP] = 0; 2177 sp->pp_seq[IDX_LCP] = 0; 2178 sp->pp_rseq[IDX_LCP] = 0; 2179 sp->lcp.protos = 0; 2180 2181 /* 2182 * Initialize counters and timeout values. Note that we don't 2183 * use the 3 seconds suggested in RFC 1661 since we are likely 2184 * running on a fast link. XXX We should probably implement 2185 * the exponential backoff option. Note that these values are 2186 * relevant for all control protocols, not just LCP only. 2187 */ 2188 sp->lcp.timeout = 1 * hz; 2189 sp->lcp.max_terminate = 2; 2190 sp->lcp.max_configure = 10; 2191 sp->lcp.max_failure = 10; 2192 callout_init(&sp->ch[IDX_LCP], 0); 2193 sppp_lock_exit(sp); 2194 } 2195 2196 static void 2197 sppp_lcp_up(struct sppp *sp) 2198 { 2199 STDDCL; 2200 2201 KASSERT(sppp_locked(sp)); 2202 2203 /* Initialize activity timestamp: opening a connection is an activity */ 2204 sp->pp_last_receive = sp->pp_last_activity = time_uptime; 2205 2206 /* 2207 * If this interface is passive or dial-on-demand, and we are 2208 * still in Initial state, it means we've got an incoming 2209 * call. Activate the interface. 2210 */ 2211 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2212 if (debug) 2213 log(LOG_DEBUG, 2214 "%s: Up event", ifp->if_xname); 2215 ifp->if_flags |= IFF_RUNNING; 2216 if (sp->state[IDX_LCP] == STATE_INITIAL) { 2217 if (debug) 2218 addlog("(incoming call)\n"); 2219 sp->pp_flags |= PP_CALLIN; 2220 lcp.Open(sp); 2221 } else if (debug) 2222 addlog("\n"); 2223 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 && 2224 (sp->state[IDX_LCP] == STATE_INITIAL)) { 2225 ifp->if_flags |= IFF_RUNNING; 2226 lcp.Open(sp); 2227 } 2228 2229 sppp_up_event(&lcp, sp); 2230 } 2231 2232 static void 2233 sppp_lcp_down(struct sppp *sp) 2234 { 2235 STDDCL; 2236 2237 KASSERT(sppp_locked(sp)); 2238 2239 sppp_down_event(&lcp, sp); 2240 2241 /* 2242 * If this is neither a dial-on-demand nor a passive 2243 * interface, simulate an ``ifconfig down'' action, so the 2244 * administrator can force a redial by another ``ifconfig 2245 * up''. XXX For leased line operation, should we immediately 2246 * try to reopen the connection here? 2247 */ 2248 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2249 if (debug) 2250 log(LOG_INFO, 2251 "%s: Down event (carrier loss), taking interface down.\n", 2252 ifp->if_xname); 2253 sppp_lock_exit(sp); 2254 if_down(ifp); 2255 sppp_lock_enter(sp); 2256 } else { 2257 if (debug) 2258 log(LOG_DEBUG, 2259 "%s: Down event (carrier loss)\n", 2260 ifp->if_xname); 2261 } 2262 sp->pp_flags &= ~PP_CALLIN; 2263 if (sp->state[IDX_LCP] != STATE_INITIAL) 2264 lcp.Close(sp); 2265 ifp->if_flags &= ~IFF_RUNNING; 2266 } 2267 2268 static void 2269 sppp_lcp_open(struct sppp *sp) 2270 { 2271 KASSERT(sppp_locked(sp)); 2272 2273 if (sp->pp_if.if_mtu < PP_MTU) { 2274 sp->lcp.mru = sp->pp_if.if_mtu; 2275 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2276 } else 2277 sp->lcp.mru = PP_MTU; 2278 sp->lcp.their_mru = PP_MTU; 2279 2280 /* 2281 * If we are authenticator, negotiate LCP_AUTH 2282 */ 2283 if (sp->hisauth.proto != 0) 2284 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2285 else 2286 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2287 sp->pp_flags &= ~PP_NEEDAUTH; 2288 sppp_open_event(&lcp, sp); 2289 } 2290 2291 static void 2292 sppp_lcp_close(struct sppp *sp) 2293 { 2294 KASSERT(sppp_locked(sp)); 2295 sppp_close_event(&lcp, sp); 2296 } 2297 2298 static void 2299 sppp_lcp_TO(void *cookie) 2300 { 2301 struct sppp *sp = (struct sppp*)cookie; 2302 KASSERT(!sppp_locked(sp)); 2303 2304 sppp_lock_enter(sp); 2305 sppp_to_event(&lcp, sp); 2306 sppp_lock_exit(sp); 2307 } 2308 2309 /* 2310 * Analyze a configure request. Return true if it was agreeable, and 2311 * caused action sca, false if it has been rejected or nak'ed, and 2312 * caused action scn. (The return value is used to make the state 2313 * transition decision in the state automaton.) 2314 */ 2315 static int 2316 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2317 { 2318 STDDCL; 2319 u_char *buf, *r, *p, l, blen; 2320 int origlen, rlen; 2321 uint32_t nmagic; 2322 u_short authproto; 2323 2324 KASSERT(sppp_locked(sp)); 2325 2326 len -= 4; 2327 origlen = len; 2328 buf = r = malloc (blen = len, M_TEMP, M_NOWAIT); 2329 if (! buf) 2330 return (0); 2331 2332 if (debug) 2333 log(LOG_DEBUG, "%s: lcp parse opts:", 2334 ifp->if_xname); 2335 2336 /* pass 1: check for things that need to be rejected */ 2337 p = (void *)(h + 1); 2338 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2339 /* Sanity check option length */ 2340 if (l > len) { 2341 /* 2342 * Malicious option - drop immediately. 2343 * XXX Maybe we should just RXJ it? 2344 */ 2345 addlog("%s: received malicious LCP option 0x%02x, " 2346 "length 0x%02x, (len: 0x%02x) dropping.\n", ifp->if_xname, 2347 p[0], l, len); 2348 goto drop; 2349 } 2350 if (debug) 2351 addlog(" %s", sppp_lcp_opt_name(*p)); 2352 switch (*p) { 2353 case LCP_OPT_MAGIC: 2354 /* Magic number. */ 2355 /* fall through, both are same length */ 2356 case LCP_OPT_ASYNC_MAP: 2357 /* Async control character map. */ 2358 if (len >= 6 || l == 6) 2359 continue; 2360 if (debug) 2361 addlog(" [invalid]"); 2362 break; 2363 case LCP_OPT_MRU: 2364 /* Maximum receive unit. */ 2365 if (len >= 4 && l == 4) 2366 continue; 2367 if (debug) 2368 addlog(" [invalid]"); 2369 break; 2370 case LCP_OPT_AUTH_PROTO: 2371 if (len < 4) { 2372 if (debug) 2373 addlog(" [invalid]"); 2374 break; 2375 } 2376 authproto = (p[2] << 8) + p[3]; 2377 if (authproto == PPP_CHAP && l != 5) { 2378 if (debug) 2379 addlog(" [invalid chap len]"); 2380 break; 2381 } 2382 if (sp->myauth.proto == 0) { 2383 /* we are not configured to do auth */ 2384 if (debug) 2385 addlog(" [not configured]"); 2386 break; 2387 } 2388 /* 2389 * Remote want us to authenticate, remember this, 2390 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2391 * up. 2392 */ 2393 sp->pp_flags |= PP_NEEDAUTH; 2394 continue; 2395 default: 2396 /* Others not supported. */ 2397 if (debug) 2398 addlog(" [rej]"); 2399 break; 2400 } 2401 if (rlen + l > blen) { 2402 if (debug) 2403 addlog(" [overflow]"); 2404 continue; 2405 } 2406 /* Add the option to rejected list. */ 2407 memcpy(r, p, l); 2408 r += l; 2409 rlen += l; 2410 } 2411 if (rlen) { 2412 if (debug) 2413 addlog(" send conf-rej\n"); 2414 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2415 goto end; 2416 } else if (debug) 2417 addlog("\n"); 2418 2419 /* 2420 * pass 2: check for option values that are unacceptable and 2421 * thus require to be nak'ed. 2422 */ 2423 if (debug) 2424 log(LOG_DEBUG, "%s: lcp parse opt values: ", 2425 ifp->if_xname); 2426 2427 p = (void *)(h + 1); 2428 len = origlen; 2429 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2430 if (debug) 2431 addlog(" %s", sppp_lcp_opt_name(*p)); 2432 switch (*p) { 2433 case LCP_OPT_MAGIC: 2434 /* Magic number -- extract. */ 2435 nmagic = (uint32_t)p[2] << 24 | 2436 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2437 if (nmagic != sp->lcp.magic) { 2438 if (debug) 2439 addlog(" 0x%x", nmagic); 2440 continue; 2441 } 2442 /* 2443 * Local and remote magics equal -- loopback? 2444 */ 2445 if (sp->pp_loopcnt >= LOOPALIVECNT*5) { 2446 printf ("%s: loopback\n", 2447 ifp->if_xname); 2448 sp->pp_loopcnt = 0; 2449 if (ifp->if_flags & IFF_UP) { 2450 sppp_lock_exit(sp); 2451 if_down(ifp); 2452 sppp_lock_enter(sp); 2453 IF_PURGE(&sp->pp_cpq); 2454 /* XXX ? */ 2455 lcp.Down(sp); 2456 lcp.Up(sp); 2457 } 2458 } else if (debug) 2459 addlog(" [glitch]"); 2460 ++sp->pp_loopcnt; 2461 /* 2462 * We negate our magic here, and NAK it. If 2463 * we see it later in an NAK packet, we 2464 * suggest a new one. 2465 */ 2466 nmagic = ~sp->lcp.magic; 2467 /* Gonna NAK it. */ 2468 p[2] = nmagic >> 24; 2469 p[3] = nmagic >> 16; 2470 p[4] = nmagic >> 8; 2471 p[5] = nmagic; 2472 break; 2473 2474 case LCP_OPT_ASYNC_MAP: 2475 /* 2476 * Async control character map -- just ignore it. 2477 * 2478 * Quote from RFC 1662, chapter 6: 2479 * To enable this functionality, synchronous PPP 2480 * implementations MUST always respond to the 2481 * Async-Control-Character-Map Configuration 2482 * Option with the LCP Configure-Ack. However, 2483 * acceptance of the Configuration Option does 2484 * not imply that the synchronous implementation 2485 * will do any ACCM mapping. Instead, all such 2486 * octet mapping will be performed by the 2487 * asynchronous-to-synchronous converter. 2488 */ 2489 continue; 2490 2491 case LCP_OPT_MRU: 2492 /* 2493 * Maximum receive unit. Always agreeable, 2494 * but ignored by now. 2495 */ 2496 sp->lcp.their_mru = p[2] * 256 + p[3]; 2497 if (debug) 2498 addlog(" %ld", sp->lcp.their_mru); 2499 continue; 2500 2501 case LCP_OPT_AUTH_PROTO: 2502 authproto = (p[2] << 8) + p[3]; 2503 if (sp->myauth.proto != authproto) { 2504 /* not agreed, nak */ 2505 if (debug) 2506 addlog(" [mine %s != his %s]", 2507 sppp_proto_name(sp->myauth.proto), 2508 sppp_proto_name(authproto)); 2509 p[2] = sp->myauth.proto >> 8; 2510 p[3] = sp->myauth.proto; 2511 break; 2512 } 2513 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2514 if (debug) 2515 addlog(" [chap not MD5]"); 2516 p[4] = CHAP_MD5; 2517 break; 2518 } 2519 continue; 2520 } 2521 if (rlen + l > blen) { 2522 if (debug) 2523 addlog(" [overflow]"); 2524 continue; 2525 } 2526 /* Add the option to nak'ed list. */ 2527 memcpy(r, p, l); 2528 r += l; 2529 rlen += l; 2530 } 2531 if (rlen) { 2532 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2533 if (debug) 2534 addlog(" max_failure (%d) exceeded, " 2535 "send conf-rej\n", 2536 sp->lcp.max_failure); 2537 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2538 } else { 2539 if (debug) 2540 addlog(" send conf-nak\n"); 2541 sppp_cp_send(sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2542 } 2543 goto end; 2544 } else { 2545 if (debug) 2546 addlog(" send conf-ack\n"); 2547 sp->fail_counter[IDX_LCP] = 0; 2548 sp->pp_loopcnt = 0; 2549 sppp_cp_send(sp, PPP_LCP, CONF_ACK, h->ident, origlen, h + 1); 2550 } 2551 2552 end: 2553 free(buf, M_TEMP); 2554 return (rlen == 0); 2555 2556 drop: 2557 free(buf, M_TEMP); 2558 return -1; 2559 } 2560 2561 /* 2562 * Analyze the LCP Configure-Reject option list, and adjust our 2563 * negotiation. 2564 */ 2565 static void 2566 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2567 { 2568 STDDCL; 2569 u_char *buf, *p, l; 2570 2571 KASSERT(sppp_locked(sp)); 2572 2573 len -= 4; 2574 buf = malloc (len, M_TEMP, M_NOWAIT); 2575 if (!buf) 2576 return; 2577 2578 if (debug) 2579 log(LOG_DEBUG, "%s: lcp rej opts:", 2580 ifp->if_xname); 2581 2582 p = (void *)(h + 1); 2583 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2584 /* Sanity check option length */ 2585 if (l > len) { 2586 /* 2587 * Malicious option - drop immediately. 2588 * XXX Maybe we should just RXJ it? 2589 */ 2590 addlog("%s: received malicious LCP option, " 2591 "dropping.\n", ifp->if_xname); 2592 goto drop; 2593 } 2594 if (debug) 2595 addlog(" %s", sppp_lcp_opt_name(*p)); 2596 switch (*p) { 2597 case LCP_OPT_MAGIC: 2598 /* Magic number -- can't use it, use 0 */ 2599 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2600 sp->lcp.magic = 0; 2601 break; 2602 case LCP_OPT_MRU: 2603 /* 2604 * We try to negotiate a lower MRU if the underlying 2605 * link's MTU is less than PP_MTU (e.g. PPPoE). If the 2606 * peer rejects this lower rate, fallback to the 2607 * default. 2608 */ 2609 if (debug) { 2610 addlog("%s: warning: peer rejected our MRU of " 2611 "%ld bytes. Defaulting to %d bytes\n", 2612 ifp->if_xname, sp->lcp.mru, PP_MTU); 2613 } 2614 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2615 sp->lcp.mru = PP_MTU; 2616 break; 2617 case LCP_OPT_AUTH_PROTO: 2618 /* 2619 * Peer doesn't want to authenticate himself, 2620 * deny unless this is a dialout call, and 2621 * SPPP_AUTHFLAG_NOCALLOUT is set. 2622 */ 2623 if ((sp->pp_flags & PP_CALLIN) == 0 && 2624 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2625 if (debug) 2626 addlog(" [don't insist on auth " 2627 "for callout]"); 2628 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2629 break; 2630 } 2631 if (debug) 2632 addlog("[access denied]\n"); 2633 lcp.Close(sp); 2634 break; 2635 } 2636 } 2637 if (debug) 2638 addlog("\n"); 2639 drop: 2640 free(buf, M_TEMP); 2641 return; 2642 } 2643 2644 /* 2645 * Analyze the LCP Configure-NAK option list, and adjust our 2646 * negotiation. 2647 */ 2648 static void 2649 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2650 { 2651 STDDCL; 2652 u_char *buf, *p, l, blen; 2653 uint32_t magic; 2654 2655 KASSERT(sppp_locked(sp)); 2656 2657 len -= 4; 2658 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 2659 if (!buf) 2660 return; 2661 2662 if (debug) 2663 log(LOG_DEBUG, "%s: lcp nak opts:", 2664 ifp->if_xname); 2665 2666 p = (void *)(h + 1); 2667 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2668 /* Sanity check option length */ 2669 if (l > len) { 2670 /* 2671 * Malicious option - drop immediately. 2672 * XXX Maybe we should just RXJ it? 2673 */ 2674 addlog("%s: received malicious LCP option, " 2675 "dropping.\n", ifp->if_xname); 2676 goto drop; 2677 } 2678 if (debug) 2679 addlog(" %s", sppp_lcp_opt_name(*p)); 2680 switch (*p) { 2681 case LCP_OPT_MAGIC: 2682 /* Magic number -- renegotiate */ 2683 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2684 len >= 6 && l == 6) { 2685 magic = (uint32_t)p[2] << 24 | 2686 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2687 /* 2688 * If the remote magic is our negated one, 2689 * this looks like a loopback problem. 2690 * Suggest a new magic to make sure. 2691 */ 2692 if (magic == ~sp->lcp.magic) { 2693 if (debug) 2694 addlog(" magic glitch"); 2695 sp->lcp.magic = cprng_fast32(); 2696 } else { 2697 sp->lcp.magic = magic; 2698 if (debug) 2699 addlog(" %d", magic); 2700 } 2701 } 2702 break; 2703 case LCP_OPT_MRU: 2704 /* 2705 * Peer wants to advise us to negotiate an MRU. 2706 * Agree on it if it's reasonable, or use 2707 * default otherwise. 2708 */ 2709 if (len >= 4 && l == 4) { 2710 u_int mru = p[2] * 256 + p[3]; 2711 if (debug) 2712 addlog(" %d", mru); 2713 if (mru < PPP_MINMRU || mru > sp->pp_if.if_mtu) 2714 mru = sp->pp_if.if_mtu; 2715 sp->lcp.mru = mru; 2716 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2717 } 2718 break; 2719 case LCP_OPT_AUTH_PROTO: 2720 /* 2721 * Peer doesn't like our authentication method, 2722 * deny. 2723 */ 2724 if (debug) 2725 addlog("[access denied]\n"); 2726 lcp.Close(sp); 2727 break; 2728 } 2729 } 2730 if (debug) 2731 addlog("\n"); 2732 drop: 2733 free(buf, M_TEMP); 2734 return; 2735 } 2736 2737 static void 2738 sppp_lcp_tlu(struct sppp *sp) 2739 { 2740 struct ifnet *ifp = &sp->pp_if; 2741 int i; 2742 uint32_t mask; 2743 2744 KASSERT(sppp_locked(sp)); 2745 2746 /* XXX ? */ 2747 if (! (ifp->if_flags & IFF_UP) && 2748 (ifp->if_flags & IFF_RUNNING)) { 2749 /* Coming out of loopback mode. */ 2750 sppp_lock_exit(sp); 2751 if_up(ifp); 2752 sppp_lock_enter(sp); 2753 } 2754 2755 for (i = 0; i < IDX_COUNT; i++) 2756 if ((cps[i])->flags & CP_QUAL) 2757 (cps[i])->Open(sp); 2758 2759 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2760 (sp->pp_flags & PP_NEEDAUTH) != 0) 2761 sppp_change_phase(sp, SPPP_PHASE_AUTHENTICATE); 2762 else 2763 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 2764 2765 /* 2766 * Open all authentication protocols. This is even required 2767 * if we already proceeded to network phase, since it might be 2768 * that remote wants us to authenticate, so we might have to 2769 * send a PAP request. Undesired authentication protocols 2770 * don't do anything when they get an Open event. 2771 */ 2772 for (i = 0; i < IDX_COUNT; i++) 2773 if ((cps[i])->flags & CP_AUTH) 2774 (cps[i])->Open(sp); 2775 2776 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2777 /* Notify all NCPs. */ 2778 for (i = 0; i < IDX_COUNT; i++) 2779 if ((cps[i])->flags & CP_NCP) 2780 (cps[i])->Open(sp); 2781 } 2782 2783 /* Send Up events to all started protos. */ 2784 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) { 2785 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2786 (cps[i])->Up(sp); 2787 } 2788 } 2789 2790 /* notify low-level driver of state change */ 2791 if (sp->pp_chg) 2792 sp->pp_chg(sp, (int)sp->pp_phase); 2793 2794 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2795 /* if no NCP is starting, close down */ 2796 sppp_lcp_check_and_close(sp); 2797 } 2798 2799 static void 2800 sppp_lcp_tld(struct sppp *sp) 2801 { 2802 int i; 2803 uint32_t mask; 2804 2805 KASSERT(sppp_locked(sp)); 2806 2807 sppp_change_phase(sp, SPPP_PHASE_TERMINATE); 2808 2809 /* 2810 * Take upper layers down. We send the Down event first and 2811 * the Close second to prevent the upper layers from sending 2812 * ``a flurry of terminate-request packets'', as the RFC 2813 * describes it. 2814 */ 2815 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) { 2816 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2817 (cps[i])->Down(sp); 2818 (cps[i])->Close(sp); 2819 } 2820 } 2821 } 2822 2823 static void 2824 sppp_lcp_tls(struct sppp *sp) 2825 { 2826 2827 KASSERT(sppp_locked(sp)); 2828 2829 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2830 printf("%s: authentication failed %d times, not retrying again\n", 2831 sp->pp_if.if_xname, sp->pp_auth_failures); 2832 sppp_lock_exit(sp); 2833 if_down(&sp->pp_if); 2834 sppp_lock_enter(sp); 2835 return; 2836 } 2837 2838 sppp_change_phase(sp, SPPP_PHASE_ESTABLISH); 2839 2840 /* Notify lower layer if desired. */ 2841 if (sp->pp_tls) 2842 (sp->pp_tls)(sp); 2843 } 2844 2845 static void 2846 sppp_lcp_tlf(struct sppp *sp) 2847 { 2848 KASSERT(sppp_locked(sp)); 2849 2850 sppp_change_phase(sp, SPPP_PHASE_DEAD); 2851 2852 /* Notify lower layer if desired. */ 2853 if (sp->pp_tlf) 2854 (sp->pp_tlf)(sp); 2855 } 2856 2857 static void 2858 sppp_lcp_scr(struct sppp *sp) 2859 { 2860 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2861 int i = 0; 2862 u_short authproto; 2863 2864 KASSERT(sppp_locked(sp)); 2865 2866 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2867 if (! sp->lcp.magic) 2868 sp->lcp.magic = cprng_fast32(); 2869 opt[i++] = LCP_OPT_MAGIC; 2870 opt[i++] = 6; 2871 opt[i++] = sp->lcp.magic >> 24; 2872 opt[i++] = sp->lcp.magic >> 16; 2873 opt[i++] = sp->lcp.magic >> 8; 2874 opt[i++] = sp->lcp.magic; 2875 } 2876 2877 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2878 opt[i++] = LCP_OPT_MRU; 2879 opt[i++] = 4; 2880 opt[i++] = sp->lcp.mru >> 8; 2881 opt[i++] = sp->lcp.mru; 2882 } 2883 2884 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2885 authproto = sp->hisauth.proto; 2886 opt[i++] = LCP_OPT_AUTH_PROTO; 2887 opt[i++] = authproto == PPP_CHAP? 5: 4; 2888 opt[i++] = authproto >> 8; 2889 opt[i++] = authproto; 2890 if (authproto == PPP_CHAP) 2891 opt[i++] = CHAP_MD5; 2892 } 2893 2894 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2895 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2896 } 2897 2898 /* 2899 * Check the open NCPs, return true if at least one NCP is open. 2900 */ 2901 static int 2902 sppp_ncp_check(struct sppp *sp) 2903 { 2904 int i, mask; 2905 2906 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2907 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2908 return 1; 2909 return 0; 2910 } 2911 2912 /* 2913 * Re-check the open NCPs and see if we should terminate the link. 2914 * Called by the NCPs during their tlf action handling. 2915 */ 2916 static void 2917 sppp_lcp_check_and_close(struct sppp *sp) 2918 { 2919 KASSERT(sppp_locked(sp)); 2920 2921 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2922 /* don't bother, we are already going down */ 2923 return; 2924 2925 if (sppp_ncp_check(sp)) 2926 return; 2927 lcp.Close(sp); 2928 } 2929 2930 2931 /* 2932 *--------------------------------------------------------------------------* 2933 * * 2934 * The IPCP implementation. * 2935 * * 2936 *--------------------------------------------------------------------------* 2937 */ 2938 2939 static void 2940 sppp_ipcp_init(struct sppp *sp) 2941 { 2942 int error; 2943 2944 sppp_lock_enter(sp); 2945 sp->ipcp.opts = 0; 2946 sp->ipcp.flags = 0; 2947 sp->state[IDX_IPCP] = STATE_INITIAL; 2948 sp->fail_counter[IDX_IPCP] = 0; 2949 sp->pp_seq[IDX_IPCP] = 0; 2950 sp->pp_rseq[IDX_IPCP] = 0; 2951 callout_init(&sp->ch[IDX_IPCP], 0); 2952 2953 error = workqueue_create(&sp->ipcp.update_addrs_wq, "ipcp_update_addrs", 2954 sppp_update_ip_addrs_work, sp, PRI_SOFTNET, IPL_NET, 0); 2955 if (error) 2956 panic("%s: update_addrs workqueue_create failed (%d)\n", 2957 __func__, error); 2958 sp->ipcp.update_addrs_q = pcq_create(IPCP_UPDATE_LIMIT, KM_SLEEP); 2959 2960 sp->ipcp.update_addrs_enqueued = 0; 2961 sppp_lock_exit(sp); 2962 } 2963 2964 static void 2965 sppp_ipcp_up(struct sppp *sp) 2966 { 2967 KASSERT(sppp_locked(sp)); 2968 sppp_up_event(&ipcp, sp); 2969 } 2970 2971 static void 2972 sppp_ipcp_down(struct sppp *sp) 2973 { 2974 KASSERT(sppp_locked(sp)); 2975 sppp_down_event(&ipcp, sp); 2976 } 2977 2978 static void 2979 sppp_ipcp_open(struct sppp *sp) 2980 { 2981 STDDCL; 2982 uint32_t myaddr, hisaddr; 2983 2984 KASSERT(sppp_locked(sp)); 2985 2986 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 2987 sp->ipcp.req_myaddr = 0; 2988 sp->ipcp.req_hisaddr = 0; 2989 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 2990 2991 #ifdef INET 2992 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 2993 #else 2994 myaddr = hisaddr = 0; 2995 #endif 2996 /* 2997 * If we don't have his address, this probably means our 2998 * interface doesn't want to talk IP at all. (This could 2999 * be the case if somebody wants to speak only IPX, for 3000 * example.) Don't open IPCP in this case. 3001 */ 3002 if (hisaddr == 0) { 3003 /* XXX this message should go away */ 3004 if (debug) 3005 log(LOG_DEBUG, "%s: ipcp_open(): no IP interface\n", 3006 ifp->if_xname); 3007 return; 3008 } 3009 3010 if (myaddr == 0) { 3011 /* 3012 * I don't have an assigned address, so i need to 3013 * negotiate my address. 3014 */ 3015 sp->ipcp.flags |= IPCP_MYADDR_DYN; 3016 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3017 } 3018 if (hisaddr == 1) { 3019 /* 3020 * XXX - remove this hack! 3021 * remote has no valid address, we need to get one assigned. 3022 */ 3023 sp->ipcp.flags |= IPCP_HISADDR_DYN; 3024 } 3025 sppp_open_event(&ipcp, sp); 3026 } 3027 3028 static void 3029 sppp_ipcp_close(struct sppp *sp) 3030 { 3031 3032 KASSERT(sppp_locked(sp)); 3033 sppp_close_event(&ipcp, sp); 3034 3035 #ifdef INET 3036 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 3037 /* 3038 * Some address was dynamic, clear it again. 3039 */ 3040 sppp_clear_ip_addrs(sp); 3041 #endif 3042 } 3043 3044 static void 3045 sppp_ipcp_TO(void *cookie) 3046 { 3047 struct sppp *sp = cookie; 3048 3049 KASSERT(!sppp_locked(sp)); 3050 3051 sppp_lock_enter(sp); 3052 sppp_to_event(&ipcp, (struct sppp *)cookie); 3053 sppp_lock_exit(sp); 3054 } 3055 3056 /* 3057 * Analyze a configure request. Return true if it was agreeable, and 3058 * caused action sca, false if it has been rejected or nak'ed, and 3059 * caused action scn. (The return value is used to make the state 3060 * transition decision in the state automaton.) 3061 */ 3062 static int 3063 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3064 { 3065 u_char *buf, *r, *p, l, blen; 3066 struct ifnet *ifp = &sp->pp_if; 3067 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3068 uint32_t hisaddr, desiredaddr; 3069 3070 KASSERT(sppp_locked(sp)); 3071 len -= 4; 3072 origlen = len; 3073 /* 3074 * Make sure to allocate a buf that can at least hold a 3075 * conf-nak with an `address' option. We might need it below. 3076 */ 3077 blen = len < 6 ? 6 : len; 3078 buf = r = malloc (blen, M_TEMP, M_NOWAIT); 3079 if (! buf) 3080 return (0); 3081 3082 /* pass 1: see if we can recognize them */ 3083 if (debug) 3084 log(LOG_DEBUG, "%s: ipcp parse opts:", 3085 ifp->if_xname); 3086 p = (void *)(h + 1); 3087 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3088 /* Sanity check option length */ 3089 if (l > len) { 3090 /* XXX should we just RXJ? */ 3091 addlog("%s: malicious IPCP option received, dropping\n", 3092 ifp->if_xname); 3093 goto drop; 3094 } 3095 if (debug) 3096 addlog(" %s", sppp_ipcp_opt_name(*p)); 3097 switch (*p) { 3098 #ifdef notyet 3099 case IPCP_OPT_COMPRESSION: 3100 if (len >= 6 && l >= 6) { 3101 /* correctly formed compress option */ 3102 continue; 3103 } 3104 if (debug) 3105 addlog(" [invalid]"); 3106 break; 3107 #endif 3108 case IPCP_OPT_ADDRESS: 3109 if (len >= 6 && l == 6) { 3110 /* correctly formed address option */ 3111 continue; 3112 } 3113 if (debug) 3114 addlog(" [invalid]"); 3115 break; 3116 default: 3117 /* Others not supported. */ 3118 if (debug) 3119 addlog(" [rej]"); 3120 break; 3121 } 3122 /* Add the option to rejected list. */ 3123 if (rlen + l > blen) { 3124 if (debug) 3125 addlog(" [overflow]"); 3126 continue; 3127 } 3128 memcpy(r, p, l); 3129 r += l; 3130 rlen += l; 3131 } 3132 if (rlen) { 3133 if (debug) 3134 addlog(" send conf-rej\n"); 3135 sppp_cp_send(sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 3136 goto end; 3137 } else if (debug) 3138 addlog("\n"); 3139 3140 /* pass 2: parse option values */ 3141 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 3142 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 3143 else 3144 #ifdef INET 3145 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 3146 #else 3147 hisaddr = 0; 3148 #endif 3149 if (debug) 3150 log(LOG_DEBUG, "%s: ipcp parse opt values: ", 3151 ifp->if_xname); 3152 p = (void *)(h + 1); 3153 len = origlen; 3154 for (rlen=0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3155 if (debug) 3156 addlog(" %s", sppp_ipcp_opt_name(*p)); 3157 switch (*p) { 3158 #ifdef notyet 3159 case IPCP_OPT_COMPRESSION: 3160 continue; 3161 #endif 3162 case IPCP_OPT_ADDRESS: 3163 desiredaddr = p[2] << 24 | p[3] << 16 | 3164 p[4] << 8 | p[5]; 3165 if (desiredaddr == hisaddr || 3166 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 3167 /* 3168 * Peer's address is same as our value, 3169 * this is agreeable. Gonna conf-ack 3170 * it. 3171 */ 3172 if (debug) 3173 addlog(" %s [ack]", 3174 sppp_dotted_quad(hisaddr)); 3175 /* record that we've seen it already */ 3176 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 3177 sp->ipcp.req_hisaddr = desiredaddr; 3178 hisaddr = desiredaddr; 3179 continue; 3180 } 3181 /* 3182 * The address wasn't agreeable. This is either 3183 * he sent us 0.0.0.0, asking to assign him an 3184 * address, or he send us another address not 3185 * matching our value. Either case, we gonna 3186 * conf-nak it with our value. 3187 */ 3188 if (debug) { 3189 if (desiredaddr == 0) 3190 addlog(" [addr requested]"); 3191 else 3192 addlog(" %s [not agreed]", 3193 sppp_dotted_quad(desiredaddr)); 3194 } 3195 3196 p[2] = hisaddr >> 24; 3197 p[3] = hisaddr >> 16; 3198 p[4] = hisaddr >> 8; 3199 p[5] = hisaddr; 3200 break; 3201 } 3202 if (rlen + l > blen) { 3203 if (debug) 3204 addlog(" [overflow]"); 3205 continue; 3206 } 3207 /* Add the option to nak'ed list. */ 3208 memcpy(r, p, l); 3209 r += l; 3210 rlen += l; 3211 } 3212 3213 /* 3214 * If we are about to conf-ack the request, but haven't seen 3215 * his address so far, gonna conf-nak it instead, with the 3216 * `address' option present and our idea of his address being 3217 * filled in there, to request negotiation of both addresses. 3218 * 3219 * XXX This can result in an endless req - nak loop if peer 3220 * doesn't want to send us his address. Q: What should we do 3221 * about it? XXX A: implement the max-failure counter. 3222 */ 3223 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 3224 buf[0] = IPCP_OPT_ADDRESS; 3225 buf[1] = 6; 3226 buf[2] = hisaddr >> 24; 3227 buf[3] = hisaddr >> 16; 3228 buf[4] = hisaddr >> 8; 3229 buf[5] = hisaddr; 3230 rlen = 6; 3231 if (debug) 3232 addlog(" still need hisaddr"); 3233 } 3234 3235 if (rlen) { 3236 if (debug) 3237 addlog(" send conf-nak\n"); 3238 sppp_cp_send(sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 3239 } else { 3240 if (debug) 3241 addlog(" send conf-ack\n"); 3242 sppp_cp_send(sp, PPP_IPCP, CONF_ACK, h->ident, origlen, h + 1); 3243 } 3244 3245 end: 3246 free(buf, M_TEMP); 3247 return (rlen == 0); 3248 3249 drop: 3250 free(buf, M_TEMP); 3251 return -1; 3252 } 3253 3254 /* 3255 * Analyze the IPCP Configure-Reject option list, and adjust our 3256 * negotiation. 3257 */ 3258 static void 3259 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3260 { 3261 u_char *buf, *p, l, blen; 3262 struct ifnet *ifp = &sp->pp_if; 3263 int debug = ifp->if_flags & IFF_DEBUG; 3264 3265 KASSERT(sppp_locked(sp)); 3266 3267 len -= 4; 3268 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 3269 if (!buf) 3270 return; 3271 3272 if (debug) 3273 log(LOG_DEBUG, "%s: ipcp rej opts:", 3274 ifp->if_xname); 3275 3276 p = (void *)(h + 1); 3277 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3278 /* Sanity check option length */ 3279 if (l > len) { 3280 /* XXX should we just RXJ? */ 3281 addlog("%s: malicious IPCP option received, dropping\n", 3282 ifp->if_xname); 3283 goto drop; 3284 } 3285 if (debug) 3286 addlog(" %s", sppp_ipcp_opt_name(*p)); 3287 switch (*p) { 3288 case IPCP_OPT_ADDRESS: 3289 /* 3290 * Peer doesn't grok address option. This is 3291 * bad. XXX Should we better give up here? 3292 */ 3293 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 3294 break; 3295 #ifdef notyet 3296 case IPCP_OPT_COMPRESS: 3297 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 3298 break; 3299 #endif 3300 } 3301 } 3302 if (debug) 3303 addlog("\n"); 3304 drop: 3305 free(buf, M_TEMP); 3306 return; 3307 } 3308 3309 /* 3310 * Analyze the IPCP Configure-NAK option list, and adjust our 3311 * negotiation. 3312 */ 3313 static void 3314 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3315 { 3316 u_char *p, l; 3317 struct ifnet *ifp = &sp->pp_if; 3318 int debug = ifp->if_flags & IFF_DEBUG; 3319 uint32_t wantaddr; 3320 3321 KASSERT(sppp_locked(sp)); 3322 3323 len -= 4; 3324 3325 if (debug) 3326 log(LOG_DEBUG, "%s: ipcp nak opts:", 3327 ifp->if_xname); 3328 3329 p = (void *)(h + 1); 3330 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3331 /* Sanity check option length */ 3332 if (l > len) { 3333 /* XXX should we just RXJ? */ 3334 addlog("%s: malicious IPCP option received, dropping\n", 3335 ifp->if_xname); 3336 return; 3337 } 3338 if (debug) 3339 addlog(" %s", sppp_ipcp_opt_name(*p)); 3340 switch (*p) { 3341 case IPCP_OPT_ADDRESS: 3342 /* 3343 * Peer doesn't like our local IP address. See 3344 * if we can do something for him. We'll drop 3345 * him our address then. 3346 */ 3347 if (len >= 6 && l == 6) { 3348 wantaddr = p[2] << 24 | p[3] << 16 | 3349 p[4] << 8 | p[5]; 3350 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3351 if (debug) 3352 addlog(" [wantaddr %s]", 3353 sppp_dotted_quad(wantaddr)); 3354 /* 3355 * When doing dynamic address assignment, 3356 * we accept his offer. Otherwise, we 3357 * ignore it and thus continue to negotiate 3358 * our already existing value. 3359 */ 3360 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3361 if (debug) 3362 addlog(" [agree]"); 3363 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3364 sp->ipcp.req_myaddr = wantaddr; 3365 } 3366 } 3367 break; 3368 3369 case IPCP_OPT_PRIMDNS: 3370 if (len >= 6 && l == 6) { 3371 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3372 p[4] << 8 | p[5]; 3373 } 3374 break; 3375 3376 case IPCP_OPT_SECDNS: 3377 if (len >= 6 && l == 6) { 3378 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3379 p[4] << 8 | p[5]; 3380 } 3381 break; 3382 #ifdef notyet 3383 case IPCP_OPT_COMPRESS: 3384 /* 3385 * Peer wants different compression parameters. 3386 */ 3387 break; 3388 #endif 3389 } 3390 } 3391 if (debug) 3392 addlog("\n"); 3393 } 3394 3395 static void 3396 sppp_ipcp_tlu(struct sppp *sp) 3397 { 3398 #ifdef INET 3399 KASSERT(sppp_locked(sp)); 3400 /* we are up. Set addresses and notify anyone interested */ 3401 sppp_set_ip_addrs(sp); 3402 #endif 3403 } 3404 3405 static void 3406 sppp_ipcp_tld(struct sppp *sp) 3407 { 3408 } 3409 3410 static void 3411 sppp_ipcp_tls(struct sppp *sp) 3412 { 3413 KASSERT(sppp_locked(sp)); 3414 /* indicate to LCP that it must stay alive */ 3415 sp->lcp.protos |= (1 << IDX_IPCP); 3416 } 3417 3418 static void 3419 sppp_ipcp_tlf(struct sppp *sp) 3420 { 3421 KASSERT(sppp_locked(sp)); 3422 /* we no longer need LCP */ 3423 sp->lcp.protos &= ~(1 << IDX_IPCP); 3424 } 3425 3426 static void 3427 sppp_ipcp_scr(struct sppp *sp) 3428 { 3429 uint8_t opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3430 #ifdef INET 3431 uint32_t ouraddr; 3432 #endif 3433 int i = 0; 3434 3435 KASSERT(sppp_locked(sp)); 3436 3437 #ifdef notyet 3438 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3439 opt[i++] = IPCP_OPT_COMPRESSION; 3440 opt[i++] = 6; 3441 opt[i++] = 0; /* VJ header compression */ 3442 opt[i++] = 0x2d; /* VJ header compression */ 3443 opt[i++] = max_slot_id; 3444 opt[i++] = comp_slot_id; 3445 } 3446 #endif 3447 3448 #ifdef INET 3449 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3450 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3451 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3452 else 3453 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3454 opt[i++] = IPCP_OPT_ADDRESS; 3455 opt[i++] = 6; 3456 opt[i++] = ouraddr >> 24; 3457 opt[i++] = ouraddr >> 16; 3458 opt[i++] = ouraddr >> 8; 3459 opt[i++] = ouraddr; 3460 } 3461 #endif 3462 3463 if (sp->query_dns & 1) { 3464 opt[i++] = IPCP_OPT_PRIMDNS; 3465 opt[i++] = 6; 3466 opt[i++] = sp->dns_addrs[0] >> 24; 3467 opt[i++] = sp->dns_addrs[0] >> 16; 3468 opt[i++] = sp->dns_addrs[0] >> 8; 3469 opt[i++] = sp->dns_addrs[0]; 3470 } 3471 if (sp->query_dns & 2) { 3472 opt[i++] = IPCP_OPT_SECDNS; 3473 opt[i++] = 6; 3474 opt[i++] = sp->dns_addrs[1] >> 24; 3475 opt[i++] = sp->dns_addrs[1] >> 16; 3476 opt[i++] = sp->dns_addrs[1] >> 8; 3477 opt[i++] = sp->dns_addrs[1]; 3478 } 3479 3480 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3481 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3482 } 3483 3484 3485 /* 3486 *--------------------------------------------------------------------------* 3487 * * 3488 * The IPv6CP implementation. * 3489 * * 3490 *--------------------------------------------------------------------------* 3491 */ 3492 3493 #ifdef INET6 3494 static void 3495 sppp_ipv6cp_init(struct sppp *sp) 3496 { 3497 sppp_lock_enter(sp); 3498 sp->ipv6cp.opts = 0; 3499 sp->ipv6cp.flags = 0; 3500 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3501 sp->fail_counter[IDX_IPV6CP] = 0; 3502 sp->pp_seq[IDX_IPV6CP] = 0; 3503 sp->pp_rseq[IDX_IPV6CP] = 0; 3504 callout_init(&sp->ch[IDX_IPV6CP], 0); 3505 sppp_lock_exit(sp); 3506 } 3507 3508 static void 3509 sppp_ipv6cp_up(struct sppp *sp) 3510 { 3511 KASSERT(sppp_locked(sp)); 3512 sppp_up_event(&ipv6cp, sp); 3513 } 3514 3515 static void 3516 sppp_ipv6cp_down(struct sppp *sp) 3517 { 3518 KASSERT(sppp_locked(sp)); 3519 sppp_down_event(&ipv6cp, sp); 3520 } 3521 3522 static void 3523 sppp_ipv6cp_open(struct sppp *sp) 3524 { 3525 STDDCL; 3526 struct in6_addr myaddr, hisaddr; 3527 3528 KASSERT(sppp_locked(sp)); 3529 3530 #ifdef IPV6CP_MYIFID_DYN 3531 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3532 #else 3533 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3534 #endif 3535 3536 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3537 /* 3538 * If we don't have our address, this probably means our 3539 * interface doesn't want to talk IPv6 at all. (This could 3540 * be the case if somebody wants to speak only IPX, for 3541 * example.) Don't open IPv6CP in this case. 3542 */ 3543 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3544 /* XXX this message should go away */ 3545 if (debug) 3546 log(LOG_DEBUG, "%s: ipv6cp_open(): no IPv6 interface\n", 3547 ifp->if_xname); 3548 return; 3549 } 3550 3551 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3552 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3553 sppp_open_event(&ipv6cp, sp); 3554 } 3555 3556 static void 3557 sppp_ipv6cp_close(struct sppp *sp) 3558 { 3559 KASSERT(sppp_locked(sp)); 3560 sppp_close_event(&ipv6cp, sp); 3561 } 3562 3563 static void 3564 sppp_ipv6cp_TO(void *cookie) 3565 { 3566 struct sppp *sp = cookie; 3567 KASSERT(!sppp_locked(sp)); 3568 3569 sppp_lock_enter(sp); 3570 sppp_to_event(&ipv6cp, (struct sppp *)cookie); 3571 sppp_lock_exit(sp); 3572 } 3573 3574 /* 3575 * Analyze a configure request. Return true if it was agreeable, and 3576 * caused action sca, false if it has been rejected or nak'ed, and 3577 * caused action scn. (The return value is used to make the state 3578 * transition decision in the state automaton.) 3579 */ 3580 static int 3581 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3582 { 3583 u_char *buf, *r, *p, l, blen; 3584 struct ifnet *ifp = &sp->pp_if; 3585 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3586 struct in6_addr myaddr, desiredaddr, suggestaddr; 3587 int ifidcount; 3588 int type; 3589 int collision, nohisaddr; 3590 char ip6buf[INET6_ADDRSTRLEN]; 3591 3592 KASSERT(sppp_locked(sp)); 3593 3594 len -= 4; 3595 origlen = len; 3596 /* 3597 * Make sure to allocate a buf that can at least hold a 3598 * conf-nak with an `address' option. We might need it below. 3599 */ 3600 blen = len < 6 ? 6 : len; 3601 buf = r = malloc (blen, M_TEMP, M_NOWAIT); 3602 if (! buf) 3603 return (0); 3604 3605 /* pass 1: see if we can recognize them */ 3606 if (debug) 3607 log(LOG_DEBUG, "%s: ipv6cp parse opts:", 3608 ifp->if_xname); 3609 p = (void *)(h + 1); 3610 ifidcount = 0; 3611 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3612 /* Sanity check option length */ 3613 if (l > len) { 3614 /* XXX just RXJ? */ 3615 addlog("%s: received malicious IPCPv6 option, " 3616 "dropping\n", ifp->if_xname); 3617 goto drop; 3618 } 3619 if (debug) 3620 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3621 switch (*p) { 3622 case IPV6CP_OPT_IFID: 3623 if (len >= 10 && l == 10 && ifidcount == 0) { 3624 /* correctly formed address option */ 3625 ifidcount++; 3626 continue; 3627 } 3628 if (debug) 3629 addlog(" [invalid]"); 3630 break; 3631 #ifdef notyet 3632 case IPV6CP_OPT_COMPRESSION: 3633 if (len >= 4 && l >= 4) { 3634 /* correctly formed compress option */ 3635 continue; 3636 } 3637 if (debug) 3638 addlog(" [invalid]"); 3639 break; 3640 #endif 3641 default: 3642 /* Others not supported. */ 3643 if (debug) 3644 addlog(" [rej]"); 3645 break; 3646 } 3647 if (rlen + l > blen) { 3648 if (debug) 3649 addlog(" [overflow]"); 3650 continue; 3651 } 3652 /* Add the option to rejected list. */ 3653 memcpy(r, p, l); 3654 r += l; 3655 rlen += l; 3656 } 3657 if (rlen) { 3658 if (debug) 3659 addlog(" send conf-rej\n"); 3660 sppp_cp_send(sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3661 goto end; 3662 } else if (debug) 3663 addlog("\n"); 3664 3665 /* pass 2: parse option values */ 3666 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3667 if (debug) 3668 log(LOG_DEBUG, "%s: ipv6cp parse opt values: ", 3669 ifp->if_xname); 3670 p = (void *)(h + 1); 3671 len = origlen; 3672 type = CONF_ACK; 3673 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3674 if (debug) 3675 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3676 switch (*p) { 3677 #ifdef notyet 3678 case IPV6CP_OPT_COMPRESSION: 3679 continue; 3680 #endif 3681 case IPV6CP_OPT_IFID: 3682 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3683 memcpy(&desiredaddr.s6_addr[8], &p[2], 8); 3684 collision = (memcmp(&desiredaddr.s6_addr[8], 3685 &myaddr.s6_addr[8], 8) == 0); 3686 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3687 3688 desiredaddr.s6_addr16[0] = htons(0xfe80); 3689 (void)in6_setscope(&desiredaddr, &sp->pp_if, NULL); 3690 3691 if (!collision && !nohisaddr) { 3692 /* no collision, hisaddr known - Conf-Ack */ 3693 type = CONF_ACK; 3694 3695 if (debug) { 3696 addlog(" %s [%s]", 3697 IN6_PRINT(ip6buf, &desiredaddr), 3698 sppp_cp_type_name(type)); 3699 } 3700 continue; 3701 } 3702 3703 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3704 if (collision && nohisaddr) { 3705 /* collision, hisaddr unknown - Conf-Rej */ 3706 type = CONF_REJ; 3707 memset(&p[2], 0, 8); 3708 } else { 3709 /* 3710 * - no collision, hisaddr unknown, or 3711 * - collision, hisaddr known 3712 * Conf-Nak, suggest hisaddr 3713 */ 3714 type = CONF_NAK; 3715 sppp_suggest_ip6_addr(sp, &suggestaddr); 3716 memcpy(&p[2], &suggestaddr.s6_addr[8], 8); 3717 } 3718 if (debug) 3719 addlog(" %s [%s]", IN6_PRINT(ip6buf, &desiredaddr), 3720 sppp_cp_type_name(type)); 3721 break; 3722 } 3723 if (rlen + l > blen) { 3724 if (debug) 3725 addlog(" [overflow]"); 3726 continue; 3727 } 3728 /* Add the option to nak'ed list. */ 3729 memcpy(r, p, l); 3730 r += l; 3731 rlen += l; 3732 } 3733 3734 if (rlen == 0 && type == CONF_ACK) { 3735 if (debug) 3736 addlog(" send %s\n", sppp_cp_type_name(type)); 3737 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, origlen, h + 1); 3738 } else { 3739 #ifdef notdef 3740 if (type == CONF_ACK) 3741 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3742 #endif 3743 3744 if (debug) { 3745 addlog(" send %s suggest %s\n", 3746 sppp_cp_type_name(type), IN6_PRINT(ip6buf, &suggestaddr)); 3747 } 3748 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3749 } 3750 3751 end: 3752 free(buf, M_TEMP); 3753 return (rlen == 0); 3754 3755 drop: 3756 free(buf, M_TEMP); 3757 return -1; 3758 } 3759 3760 /* 3761 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3762 * negotiation. 3763 */ 3764 static void 3765 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3766 { 3767 u_char *buf, *p, l, blen; 3768 struct ifnet *ifp = &sp->pp_if; 3769 int debug = ifp->if_flags & IFF_DEBUG; 3770 3771 KASSERT(sppp_locked(sp)); 3772 3773 len -= 4; 3774 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 3775 if (!buf) 3776 return; 3777 3778 if (debug) 3779 log(LOG_DEBUG, "%s: ipv6cp rej opts:", 3780 ifp->if_xname); 3781 3782 p = (void *)(h + 1); 3783 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3784 if (l > len) { 3785 /* XXX just RXJ? */ 3786 addlog("%s: received malicious IPCPv6 option, " 3787 "dropping\n", ifp->if_xname); 3788 goto drop; 3789 } 3790 if (debug) 3791 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3792 switch (*p) { 3793 case IPV6CP_OPT_IFID: 3794 /* 3795 * Peer doesn't grok address option. This is 3796 * bad. XXX Should we better give up here? 3797 */ 3798 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3799 break; 3800 #ifdef notyet 3801 case IPV6CP_OPT_COMPRESS: 3802 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3803 break; 3804 #endif 3805 } 3806 } 3807 if (debug) 3808 addlog("\n"); 3809 drop: 3810 free(buf, M_TEMP); 3811 return; 3812 } 3813 3814 /* 3815 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3816 * negotiation. 3817 */ 3818 static void 3819 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3820 { 3821 u_char *buf, *p, l, blen; 3822 struct ifnet *ifp = &sp->pp_if; 3823 int debug = ifp->if_flags & IFF_DEBUG; 3824 struct in6_addr suggestaddr; 3825 char ip6buf[INET6_ADDRSTRLEN]; 3826 3827 KASSERT(sppp_locked(sp)); 3828 3829 len -= 4; 3830 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 3831 if (!buf) 3832 return; 3833 3834 if (debug) 3835 log(LOG_DEBUG, "%s: ipv6cp nak opts:", 3836 ifp->if_xname); 3837 3838 p = (void *)(h + 1); 3839 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3840 if (l > len) { 3841 /* XXX just RXJ? */ 3842 addlog("%s: received malicious IPCPv6 option, " 3843 "dropping\n", ifp->if_xname); 3844 goto drop; 3845 } 3846 if (debug) 3847 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3848 switch (*p) { 3849 case IPV6CP_OPT_IFID: 3850 /* 3851 * Peer doesn't like our local ifid. See 3852 * if we can do something for him. We'll drop 3853 * him our address then. 3854 */ 3855 if (len < 10 || l != 10) 3856 break; 3857 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3858 suggestaddr.s6_addr16[0] = htons(0xfe80); 3859 (void)in6_setscope(&suggestaddr, &sp->pp_if, NULL); 3860 memcpy(&suggestaddr.s6_addr[8], &p[2], 8); 3861 3862 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3863 if (debug) 3864 addlog(" [suggestaddr %s]", 3865 IN6_PRINT(ip6buf, &suggestaddr)); 3866 #ifdef IPV6CP_MYIFID_DYN 3867 /* 3868 * When doing dynamic address assignment, 3869 * we accept his offer. 3870 */ 3871 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3872 struct in6_addr lastsuggest; 3873 /* 3874 * If <suggested myaddr from peer> equals to 3875 * <hisaddr we have suggested last time>, 3876 * we have a collision. generate new random 3877 * ifid. 3878 */ 3879 sppp_suggest_ip6_addr(&lastsuggest); 3880 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3881 lastsuggest)) { 3882 if (debug) 3883 addlog(" [random]"); 3884 sppp_gen_ip6_addr(sp, &suggestaddr); 3885 } 3886 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3887 if (debug) 3888 addlog(" [agree]"); 3889 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3890 } 3891 #else 3892 /* 3893 * Since we do not do dynamic address assignment, 3894 * we ignore it and thus continue to negotiate 3895 * our already existing value. This can possibly 3896 * go into infinite request-reject loop. 3897 * 3898 * This is not likely because we normally use 3899 * ifid based on MAC-address. 3900 * If you have no ethernet card on the node, too bad. 3901 * XXX should we use fail_counter? 3902 */ 3903 #endif 3904 break; 3905 #ifdef notyet 3906 case IPV6CP_OPT_COMPRESS: 3907 /* 3908 * Peer wants different compression parameters. 3909 */ 3910 break; 3911 #endif 3912 } 3913 } 3914 if (debug) 3915 addlog("\n"); 3916 drop: 3917 free(buf, M_TEMP); 3918 return; 3919 } 3920 3921 static void 3922 sppp_ipv6cp_tlu(struct sppp *sp) 3923 { 3924 KASSERT(sppp_locked(sp)); 3925 /* we are up - notify isdn daemon */ 3926 if (sp->pp_con) 3927 sp->pp_con(sp); 3928 } 3929 3930 static void 3931 sppp_ipv6cp_tld(struct sppp *sp) 3932 { 3933 } 3934 3935 static void 3936 sppp_ipv6cp_tls(struct sppp *sp) 3937 { 3938 KASSERT(sppp_locked(sp)); 3939 /* indicate to LCP that it must stay alive */ 3940 sp->lcp.protos |= (1 << IDX_IPV6CP); 3941 } 3942 3943 static void 3944 sppp_ipv6cp_tlf(struct sppp *sp) 3945 { 3946 KASSERT(sppp_locked(sp)); 3947 /* we no longer need LCP */ 3948 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3949 } 3950 3951 static void 3952 sppp_ipv6cp_scr(struct sppp *sp) 3953 { 3954 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3955 struct in6_addr ouraddr; 3956 int i = 0; 3957 3958 KASSERT(sppp_locked(sp)); 3959 3960 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3961 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3962 opt[i++] = IPV6CP_OPT_IFID; 3963 opt[i++] = 10; 3964 memcpy(&opt[i], &ouraddr.s6_addr[8], 8); 3965 i += 8; 3966 } 3967 3968 #ifdef notyet 3969 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 3970 opt[i++] = IPV6CP_OPT_COMPRESSION; 3971 opt[i++] = 4; 3972 opt[i++] = 0; /* TBD */ 3973 opt[i++] = 0; /* TBD */ 3974 /* variable length data may follow */ 3975 } 3976 #endif 3977 3978 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 3979 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 3980 } 3981 #else /*INET6*/ 3982 static void 3983 sppp_ipv6cp_init(struct sppp *sp) 3984 { 3985 } 3986 3987 static void 3988 sppp_ipv6cp_up(struct sppp *sp) 3989 { 3990 } 3991 3992 static void 3993 sppp_ipv6cp_down(struct sppp *sp) 3994 { 3995 } 3996 3997 static void 3998 sppp_ipv6cp_open(struct sppp *sp) 3999 { 4000 } 4001 4002 static void 4003 sppp_ipv6cp_close(struct sppp *sp) 4004 { 4005 } 4006 4007 static void 4008 sppp_ipv6cp_TO(void *sp) 4009 { 4010 } 4011 4012 static int 4013 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, 4014 int len) 4015 { 4016 return 0; 4017 } 4018 4019 static void 4020 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, 4021 int len) 4022 { 4023 } 4024 4025 static void 4026 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, 4027 int len) 4028 { 4029 } 4030 4031 static void 4032 sppp_ipv6cp_tlu(struct sppp *sp) 4033 { 4034 } 4035 4036 static void 4037 sppp_ipv6cp_tld(struct sppp *sp) 4038 { 4039 } 4040 4041 static void 4042 sppp_ipv6cp_tls(struct sppp *sp) 4043 { 4044 } 4045 4046 static void 4047 sppp_ipv6cp_tlf(struct sppp *sp) 4048 { 4049 } 4050 4051 static void 4052 sppp_ipv6cp_scr(struct sppp *sp) 4053 { 4054 } 4055 #endif /*INET6*/ 4056 4057 4058 /* 4059 *--------------------------------------------------------------------------* 4060 * * 4061 * The CHAP implementation. * 4062 * * 4063 *--------------------------------------------------------------------------* 4064 */ 4065 4066 /* 4067 * The authentication protocols don't employ a full-fledged state machine as 4068 * the control protocols do, since they do have Open and Close events, but 4069 * not Up and Down, nor are they explicitly terminated. Also, use of the 4070 * authentication protocols may be different in both directions (this makes 4071 * sense, think of a machine that never accepts incoming calls but only 4072 * calls out, it doesn't require the called party to authenticate itself). 4073 * 4074 * Our state machine for the local authentication protocol (we are requesting 4075 * the peer to authenticate) looks like: 4076 * 4077 * RCA- 4078 * +--------------------------------------------+ 4079 * V scn,tld| 4080 * +--------+ Close +---------+ RCA+ 4081 * | |<----------------------------------| |------+ 4082 * +--->| Closed | TO* | Opened | sca | 4083 * | | |-----+ +-------| |<-----+ 4084 * | +--------+ irc | | +---------+ 4085 * | ^ | | ^ 4086 * | | | | | 4087 * | | | | | 4088 * | TO-| | | | 4089 * | |tld TO+ V | | 4090 * | | +------->+ | | 4091 * | | | | | | 4092 * | +--------+ V | | 4093 * | | |<----+<--------------------+ | 4094 * | | Req- | scr | 4095 * | | Sent | | 4096 * | | | | 4097 * | +--------+ | 4098 * | RCA- | | RCA+ | 4099 * +------+ +------------------------------------------+ 4100 * scn,tld sca,irc,ict,tlu 4101 * 4102 * 4103 * with: 4104 * 4105 * Open: LCP reached authentication phase 4106 * Close: LCP reached terminate phase 4107 * 4108 * RCA+: received reply (pap-req, chap-response), acceptable 4109 * RCN: received reply (pap-req, chap-response), not acceptable 4110 * TO+: timeout with restart counter >= 0 4111 * TO-: timeout with restart counter < 0 4112 * TO*: reschedule timeout for CHAP 4113 * 4114 * scr: send request packet (none for PAP, chap-challenge) 4115 * sca: send ack packet (pap-ack, chap-success) 4116 * scn: send nak packet (pap-nak, chap-failure) 4117 * ict: initialize re-challenge timer (CHAP only) 4118 * 4119 * tlu: this-layer-up, LCP reaches network phase 4120 * tld: this-layer-down, LCP enters terminate phase 4121 * 4122 * Note that in CHAP mode, after sending a new challenge, while the state 4123 * automaton falls back into Req-Sent state, it doesn't signal a tld 4124 * event to LCP, so LCP remains in network phase. Only after not getting 4125 * any response (or after getting an unacceptable response), CHAP closes, 4126 * causing LCP to enter terminate phase. 4127 * 4128 * With PAP, there is no initial request that can be sent. The peer is 4129 * expected to send one based on the successful negotiation of PAP as 4130 * the authentication protocol during the LCP option negotiation. 4131 * 4132 * Incoming authentication protocol requests (remote requests 4133 * authentication, we are peer) don't employ a state machine at all, 4134 * they are simply answered. Some peers [Ascend P50 firmware rev 4135 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 4136 * still in authentication phase (thereby violating the standard that 4137 * demands that these NCP packets are to be discarded), so we keep 4138 * track of the peer demanding us to authenticate, and only proceed to 4139 * phase network once we've seen a positive acknowledge for the 4140 * authentication. 4141 */ 4142 4143 /* 4144 * Handle incoming CHAP packets. 4145 */ 4146 void 4147 sppp_chap_input(struct sppp *sp, struct mbuf *m) 4148 { 4149 STDDCL; 4150 struct lcp_header *h; 4151 int len, x; 4152 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 4153 int value_len, name_len; 4154 MD5_CTX ctx; 4155 4156 KASSERT(!sppp_locked(sp)); 4157 4158 len = m->m_pkthdr.len; 4159 if (len < 4) { 4160 if (debug) 4161 log(LOG_DEBUG, 4162 "%s: chap invalid packet length: %d bytes\n", 4163 ifp->if_xname, len); 4164 return; 4165 } 4166 h = mtod(m, struct lcp_header *); 4167 if (len > ntohs(h->len)) 4168 len = ntohs(h->len); 4169 4170 switch (h->type) { 4171 /* challenge, failure and success are his authproto */ 4172 case CHAP_CHALLENGE: 4173 sppp_lock_enter(sp); 4174 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4175 /* can't do anything useful */ 4176 sp->pp_auth_failures++; 4177 printf("%s: chap input without my name and my secret being set\n", 4178 ifp->if_xname); 4179 sppp_lock_exit(sp); 4180 break; 4181 } 4182 value = 1 + (u_char *)(h + 1); 4183 value_len = value[-1]; 4184 name = value + value_len; 4185 name_len = len - value_len - 5; 4186 if (name_len < 0) { 4187 if (debug) { 4188 log(LOG_DEBUG, 4189 "%s: chap corrupted challenge " 4190 "<%s id=0x%x len=%d", 4191 ifp->if_xname, 4192 sppp_auth_type_name(PPP_CHAP, h->type), 4193 h->ident, ntohs(h->len)); 4194 if (len > 4) 4195 sppp_print_bytes((u_char *)(h + 1), 4196 len - 4); 4197 addlog(">\n"); 4198 } 4199 sppp_lock_exit(sp); 4200 break; 4201 } 4202 4203 if (debug) { 4204 log(LOG_DEBUG, 4205 "%s: chap input <%s id=0x%x len=%d name=", 4206 ifp->if_xname, 4207 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 4208 ntohs(h->len)); 4209 sppp_print_string((char *) name, name_len); 4210 addlog(" value-size=%d value=", value_len); 4211 sppp_print_bytes(value, value_len); 4212 addlog(">\n"); 4213 } 4214 4215 /* Compute reply value. */ 4216 MD5Init(&ctx); 4217 MD5Update(&ctx, &h->ident, 1); 4218 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 4219 MD5Update(&ctx, value, value_len); 4220 MD5Final(digest, &ctx); 4221 dsize = sizeof digest; 4222 4223 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 4224 sizeof dsize, (const char *)&dsize, 4225 sizeof digest, digest, 4226 sp->myauth.name_len, 4227 sp->myauth.name, 4228 0); 4229 sppp_lock_exit(sp); 4230 break; 4231 4232 case CHAP_SUCCESS: 4233 sppp_lock_enter(sp); 4234 if (debug) { 4235 log(LOG_DEBUG, "%s: chap success", 4236 ifp->if_xname); 4237 if (len > 4) { 4238 addlog(": "); 4239 sppp_print_string((char *)(h + 1), len - 4); 4240 } 4241 addlog("\n"); 4242 } 4243 x = splnet(); 4244 sp->pp_auth_failures = 0; 4245 sp->pp_flags &= ~PP_NEEDAUTH; 4246 if (sp->myauth.proto == PPP_CHAP && 4247 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4248 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 4249 /* 4250 * We are authenticator for CHAP but didn't 4251 * complete yet. Leave it to tlu to proceed 4252 * to network phase. 4253 */ 4254 splx(x); 4255 sppp_lock_exit(sp); 4256 break; 4257 } 4258 splx(x); 4259 sppp_phase_network(sp); 4260 sppp_lock_exit(sp); 4261 break; 4262 4263 case CHAP_FAILURE: 4264 x = splnet(); 4265 sppp_lock_enter(sp); 4266 sp->pp_auth_failures++; 4267 splx(x); 4268 if (debug) { 4269 log(LOG_INFO, "%s: chap failure", 4270 ifp->if_xname); 4271 if (len > 4) { 4272 addlog(": "); 4273 sppp_print_string((char *)(h + 1), len - 4); 4274 } 4275 addlog("\n"); 4276 } else 4277 log(LOG_INFO, "%s: chap failure\n", 4278 ifp->if_xname); 4279 sppp_lock_exit(sp); 4280 /* await LCP shutdown by authenticator */ 4281 break; 4282 4283 /* response is my authproto */ 4284 case CHAP_RESPONSE: 4285 sppp_lock_enter(sp); 4286 if (sp->hisauth.secret == NULL) { 4287 /* can't do anything useful */ 4288 printf("%s: chap input without his secret being set\n", 4289 ifp->if_xname); 4290 sppp_lock_exit(sp); 4291 break; 4292 } 4293 value = 1 + (u_char *)(h + 1); 4294 value_len = value[-1]; 4295 name = value + value_len; 4296 name_len = len - value_len - 5; 4297 if (name_len < 0) { 4298 if (debug) { 4299 log(LOG_DEBUG, 4300 "%s: chap corrupted response " 4301 "<%s id=0x%x len=%d", 4302 ifp->if_xname, 4303 sppp_auth_type_name(PPP_CHAP, h->type), 4304 h->ident, ntohs(h->len)); 4305 if (len > 4) 4306 sppp_print_bytes((u_char *)(h + 1), 4307 len - 4); 4308 addlog(">\n"); 4309 } 4310 sppp_lock_exit(sp); 4311 break; 4312 } 4313 if (h->ident != sp->confid[IDX_CHAP]) { 4314 if (debug) 4315 log(LOG_DEBUG, 4316 "%s: chap dropping response for old ID " 4317 "(got %d, expected %d)\n", 4318 ifp->if_xname, 4319 h->ident, sp->confid[IDX_CHAP]); 4320 sppp_lock_exit(sp); 4321 break; 4322 } 4323 if (sp->hisauth.name != NULL && 4324 (name_len != sp->hisauth.name_len 4325 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 4326 log(LOG_INFO, "%s: chap response, his name ", 4327 ifp->if_xname); 4328 sppp_print_string(name, name_len); 4329 addlog(" != expected "); 4330 sppp_print_string(sp->hisauth.name, 4331 sp->hisauth.name_len); 4332 addlog("\n"); 4333 goto chap_failure; 4334 } 4335 if (debug) { 4336 log(LOG_DEBUG, "%s: chap input(%s) " 4337 "<%s id=0x%x len=%d name=", 4338 ifp->if_xname, 4339 sppp_state_name(sp->state[IDX_CHAP]), 4340 sppp_auth_type_name(PPP_CHAP, h->type), 4341 h->ident, ntohs(h->len)); 4342 sppp_print_string((char *)name, name_len); 4343 addlog(" value-size=%d value=", value_len); 4344 sppp_print_bytes(value, value_len); 4345 addlog(">\n"); 4346 } 4347 if (value_len != sizeof(sp->hisauth.challenge)) { 4348 if (debug) 4349 log(LOG_DEBUG, 4350 "%s: chap bad hash value length: " 4351 "%d bytes, should be %zu\n", 4352 ifp->if_xname, value_len, 4353 sizeof(sp->hisauth.challenge)); 4354 goto chap_failure; 4355 } 4356 4357 MD5Init(&ctx); 4358 MD5Update(&ctx, &h->ident, 1); 4359 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 4360 MD5Update(&ctx, sp->hisauth.challenge, sizeof(sp->hisauth.challenge)); 4361 MD5Final(digest, &ctx); 4362 4363 #define FAILMSG "Failed..." 4364 #define SUCCMSG "Welcome!" 4365 4366 if (value_len != sizeof digest || 4367 memcmp(digest, value, value_len) != 0) { 4368 chap_failure: 4369 KASSERT(sppp_locked(sp)); 4370 /* action scn, tld */ 4371 x = splnet(); 4372 sp->pp_auth_failures++; 4373 splx(x); 4374 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 4375 sizeof(FAILMSG) - 1, (const u_char *)FAILMSG, 4376 0); 4377 chap.tld(sp); 4378 sppp_lock_exit(sp); 4379 break; 4380 } 4381 sp->pp_auth_failures = 0; 4382 /* action sca, perhaps tlu */ 4383 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 4384 sp->state[IDX_CHAP] == STATE_OPENED) 4385 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 4386 sizeof(SUCCMSG) - 1, (const u_char *)SUCCMSG, 4387 0); 4388 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 4389 sppp_cp_change_state(&chap, sp, STATE_OPENED); 4390 chap.tlu(sp); 4391 } 4392 sppp_lock_exit(sp); 4393 break; 4394 4395 default: 4396 /* Unknown CHAP packet type -- ignore. */ 4397 sppp_lock_enter(sp); 4398 if (debug) { 4399 log(LOG_DEBUG, "%s: chap unknown input(%s) " 4400 "<0x%x id=0x%xh len=%d", 4401 ifp->if_xname, 4402 sppp_state_name(sp->state[IDX_CHAP]), 4403 h->type, h->ident, ntohs(h->len)); 4404 if (len > 4) 4405 sppp_print_bytes((u_char *)(h + 1), len - 4); 4406 addlog(">\n"); 4407 } 4408 sppp_lock_exit(sp); 4409 break; 4410 4411 } 4412 } 4413 4414 void 4415 sppp_lock_enter(struct sppp *sp) 4416 { 4417 if (sp->pp_lock) 4418 mutex_enter(sp->pp_lock); 4419 } 4420 4421 void 4422 sppp_lock_exit(struct sppp *sp) 4423 { 4424 if (sp->pp_lock) 4425 mutex_exit(sp->pp_lock); 4426 } 4427 4428 int 4429 sppp_locked(struct sppp *sp) 4430 { 4431 return (!(sp->pp_lock) || mutex_owned(sp->pp_lock)); 4432 } 4433 4434 static void 4435 sppp_chap_init(struct sppp *sp) 4436 { 4437 sppp_lock_enter(sp); 4438 /* Chap doesn't have STATE_INITIAL at all. */ 4439 sp->state[IDX_CHAP] = STATE_CLOSED; 4440 sp->fail_counter[IDX_CHAP] = 0; 4441 sp->pp_seq[IDX_CHAP] = 0; 4442 sp->pp_rseq[IDX_CHAP] = 0; 4443 callout_init(&sp->ch[IDX_CHAP], 0); 4444 sppp_lock_exit(sp); 4445 } 4446 4447 static void 4448 sppp_chap_open(struct sppp *sp) 4449 { 4450 KASSERT(sppp_locked(sp)); 4451 if (sp->hisauth.proto == PPP_CHAP && 4452 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4453 /* we are authenticator for CHAP, start it */ 4454 chap.scr(sp); 4455 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4456 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4457 } 4458 /* nothing to be done if we are peer, await a challenge */ 4459 } 4460 4461 static void 4462 sppp_chap_close(struct sppp *sp) 4463 { 4464 KASSERT(sppp_locked(sp)); 4465 4466 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4467 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4468 } 4469 4470 static void 4471 sppp_chap_TO(void *cookie) 4472 { 4473 struct sppp *sp = (struct sppp *)cookie; 4474 STDDCL; 4475 int s; 4476 4477 KASSERT(!sppp_locked(sp)); 4478 4479 s = splnet(); 4480 sppp_lock_enter(sp); 4481 4482 if (debug) 4483 log(LOG_DEBUG, "%s: chap TO(%s) rst_counter = %d\n", 4484 ifp->if_xname, 4485 sppp_state_name(sp->state[IDX_CHAP]), 4486 sp->rst_counter[IDX_CHAP]); 4487 4488 if (--sp->rst_counter[IDX_CHAP] < 0) 4489 /* TO- event */ 4490 switch (sp->state[IDX_CHAP]) { 4491 case STATE_REQ_SENT: 4492 chap.tld(sp); 4493 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4494 break; 4495 } 4496 else 4497 /* TO+ (or TO*) event */ 4498 switch (sp->state[IDX_CHAP]) { 4499 case STATE_OPENED: 4500 /* TO* event */ 4501 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4502 /* fall through */ 4503 case STATE_REQ_SENT: 4504 chap.scr(sp); 4505 /* sppp_cp_change_state() will restart the timer */ 4506 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4507 break; 4508 } 4509 4510 sppp_lock_exit(sp); 4511 splx(s); 4512 } 4513 4514 static void 4515 sppp_chap_tlu(struct sppp *sp) 4516 { 4517 STDDCL; 4518 int i, x; 4519 4520 KASSERT(sppp_locked(sp)); 4521 i = 0; 4522 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4523 4524 /* 4525 * Some broken CHAP implementations (Conware CoNet, firmware 4526 * 4.0.?) don't want to re-authenticate their CHAP once the 4527 * initial challenge-response exchange has taken place. 4528 * Provide for an option to avoid rechallenges. 4529 */ 4530 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4531 /* 4532 * Compute the re-challenge timeout. This will yield 4533 * a number between 300 and 810 seconds. 4534 */ 4535 i = 300 + ((unsigned)(cprng_fast32() & 0xff00) >> 7); 4536 4537 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4538 } 4539 4540 if (debug) { 4541 log(LOG_DEBUG, 4542 "%s: chap %s, ", 4543 ifp->if_xname, 4544 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu"); 4545 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) 4546 addlog("next re-challenge in %d seconds\n", i); 4547 else 4548 addlog("re-challenging supressed\n"); 4549 } 4550 4551 x = splnet(); 4552 sp->pp_auth_failures = 0; 4553 /* indicate to LCP that we need to be closed down */ 4554 sp->lcp.protos |= (1 << IDX_CHAP); 4555 4556 if (sp->pp_flags & PP_NEEDAUTH) { 4557 /* 4558 * Remote is authenticator, but his auth proto didn't 4559 * complete yet. Defer the transition to network 4560 * phase. 4561 */ 4562 splx(x); 4563 return; 4564 } 4565 splx(x); 4566 4567 /* 4568 * If we are already in phase network, we are done here. This 4569 * is the case if this is a dummy tlu event after a re-challenge. 4570 */ 4571 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4572 sppp_phase_network(sp); 4573 } 4574 4575 static void 4576 sppp_chap_tld(struct sppp *sp) 4577 { 4578 STDDCL; 4579 4580 KASSERT(sppp_locked(sp)); 4581 4582 if (debug) 4583 log(LOG_DEBUG, "%s: chap tld\n", ifp->if_xname); 4584 callout_stop(&sp->ch[IDX_CHAP]); 4585 sp->lcp.protos &= ~(1 << IDX_CHAP); 4586 4587 lcp.Close(sp); 4588 } 4589 4590 static void 4591 sppp_chap_scr(struct sppp *sp) 4592 { 4593 uint32_t *ch; 4594 u_char clen = 4 * sizeof(uint32_t); 4595 4596 KASSERT(sppp_locked(sp)); 4597 4598 if (sp->hisauth.name == NULL) { 4599 /* can't do anything useful */ 4600 printf("%s: chap starting without his name being set\n", 4601 sp->pp_if.if_xname); 4602 return; 4603 } 4604 4605 /* Compute random challenge. */ 4606 ch = (uint32_t *)sp->hisauth.challenge; 4607 cprng_strong(kern_cprng, ch, clen, 0); 4608 4609 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4610 4611 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4612 sizeof clen, (const char *)&clen, 4613 sizeof(sp->hisauth.challenge), sp->hisauth.challenge, 4614 0); 4615 } 4616 4617 /* 4618 *--------------------------------------------------------------------------* 4619 * * 4620 * The PAP implementation. * 4621 * * 4622 *--------------------------------------------------------------------------* 4623 */ 4624 /* 4625 * For PAP, we need to keep a little state also if we are the peer, not the 4626 * authenticator. This is since we don't get a request to authenticate, but 4627 * have to repeatedly authenticate ourself until we got a response (or the 4628 * retry counter is expired). 4629 */ 4630 4631 /* 4632 * Handle incoming PAP packets. */ 4633 static void 4634 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4635 { 4636 STDDCL; 4637 struct lcp_header *h; 4638 int len, x; 4639 u_char mlen; 4640 char *name, *secret; 4641 int name_len, secret_len; 4642 4643 KASSERT(!sppp_locked(sp)); 4644 4645 /* 4646 * Malicious input might leave this uninitialized, so 4647 * init to an impossible value. 4648 */ 4649 secret_len = -1; 4650 4651 len = m->m_pkthdr.len; 4652 if (len < 5) { 4653 if (debug) 4654 log(LOG_DEBUG, 4655 "%s: pap invalid packet length: %d bytes\n", 4656 ifp->if_xname, len); 4657 return; 4658 } 4659 h = mtod(m, struct lcp_header *); 4660 if (len > ntohs(h->len)) 4661 len = ntohs(h->len); 4662 switch (h->type) { 4663 /* PAP request is my authproto */ 4664 case PAP_REQ: 4665 sppp_lock_enter(sp); 4666 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4667 /* can't do anything useful */ 4668 printf("%s: " 4669 "pap request without his name and his secret being set\n", 4670 ifp->if_xname); 4671 sppp_lock_exit(sp); 4672 break; 4673 } 4674 name = 1 + (u_char *)(h + 1); 4675 name_len = name[-1]; 4676 secret = name + name_len + 1; 4677 if (name_len > len - 6 || 4678 (secret_len = secret[-1]) > len - 6 - name_len) { 4679 if (debug) { 4680 log(LOG_DEBUG, "%s: pap corrupted input " 4681 "<%s id=0x%x len=%d", 4682 ifp->if_xname, 4683 sppp_auth_type_name(PPP_PAP, h->type), 4684 h->ident, ntohs(h->len)); 4685 if (len > 4) 4686 sppp_print_bytes((u_char *)(h + 1), 4687 len - 4); 4688 addlog(">\n"); 4689 } 4690 sppp_lock_exit(sp); 4691 break; 4692 } 4693 if (debug) { 4694 log(LOG_DEBUG, "%s: pap input(%s) " 4695 "<%s id=0x%x len=%d name=", 4696 ifp->if_xname, 4697 sppp_state_name(sp->state[IDX_PAP]), 4698 sppp_auth_type_name(PPP_PAP, h->type), 4699 h->ident, ntohs(h->len)); 4700 sppp_print_string((char *)name, name_len); 4701 addlog(" secret="); 4702 sppp_print_string((char *)secret, secret_len); 4703 addlog(">\n"); 4704 } 4705 if (name_len != sp->hisauth.name_len || 4706 secret_len != sp->hisauth.secret_len || 4707 memcmp(name, sp->hisauth.name, name_len) != 0 || 4708 memcmp(secret, sp->hisauth.secret, secret_len) != 0) { 4709 /* action scn, tld */ 4710 sp->pp_auth_failures++; 4711 mlen = sizeof(FAILMSG) - 1; 4712 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4713 sizeof mlen, (const char *)&mlen, 4714 sizeof(FAILMSG) - 1, (const u_char *)FAILMSG, 4715 0); 4716 pap.tld(sp); 4717 sppp_lock_exit(sp); 4718 break; 4719 } 4720 /* action sca, perhaps tlu */ 4721 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4722 sp->state[IDX_PAP] == STATE_OPENED) { 4723 mlen = sizeof(SUCCMSG) - 1; 4724 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4725 sizeof mlen, (const char *)&mlen, 4726 sizeof(SUCCMSG) - 1, (const u_char *)SUCCMSG, 4727 0); 4728 } 4729 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4730 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4731 pap.tlu(sp); 4732 } 4733 sppp_lock_exit(sp); 4734 break; 4735 4736 /* ack and nak are his authproto */ 4737 case PAP_ACK: 4738 sppp_lock_enter(sp); 4739 callout_stop(&sp->pap_my_to_ch); 4740 if (debug) { 4741 log(LOG_DEBUG, "%s: pap success", 4742 ifp->if_xname); 4743 name = 1 + (u_char *)(h + 1); 4744 name_len = name[-1]; 4745 if (len > 5 && name_len < len+4) { 4746 addlog(": "); 4747 sppp_print_string(name, name_len); 4748 } 4749 addlog("\n"); 4750 } 4751 x = splnet(); 4752 sp->pp_auth_failures = 0; 4753 sp->pp_flags &= ~PP_NEEDAUTH; 4754 if (sp->myauth.proto == PPP_PAP && 4755 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4756 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4757 /* 4758 * We are authenticator for PAP but didn't 4759 * complete yet. Leave it to tlu to proceed 4760 * to network phase. 4761 */ 4762 splx(x); 4763 sppp_lock_exit(sp); 4764 break; 4765 } 4766 splx(x); 4767 sppp_phase_network(sp); 4768 sppp_lock_exit(sp); 4769 break; 4770 4771 case PAP_NAK: 4772 sppp_lock_enter(sp); 4773 callout_stop(&sp->pap_my_to_ch); 4774 sp->pp_auth_failures++; 4775 if (debug) { 4776 log(LOG_INFO, "%s: pap failure", 4777 ifp->if_xname); 4778 name = 1 + (u_char *)(h + 1); 4779 name_len = name[-1]; 4780 if (len > 5 && name_len < len+4) { 4781 addlog(": "); 4782 sppp_print_string(name, name_len); 4783 } 4784 addlog("\n"); 4785 } else 4786 log(LOG_INFO, "%s: pap failure\n", 4787 ifp->if_xname); 4788 /* await LCP shutdown by authenticator */ 4789 sppp_lock_exit(sp); 4790 break; 4791 4792 default: 4793 /* Unknown PAP packet type -- ignore. */ 4794 sppp_lock_enter(sp); 4795 if (debug) { 4796 log(LOG_DEBUG, "%s: pap corrupted input " 4797 "<0x%x id=0x%x len=%d", 4798 ifp->if_xname, 4799 h->type, h->ident, ntohs(h->len)); 4800 if (len > 4) 4801 sppp_print_bytes((u_char *)(h + 1), len - 4); 4802 addlog(">\n"); 4803 } 4804 sppp_lock_exit(sp); 4805 break; 4806 4807 } 4808 } 4809 4810 static void 4811 sppp_pap_init(struct sppp *sp) 4812 { 4813 /* PAP doesn't have STATE_INITIAL at all. */ 4814 sppp_lock_enter(sp); 4815 sp->state[IDX_PAP] = STATE_CLOSED; 4816 sp->fail_counter[IDX_PAP] = 0; 4817 sp->pp_seq[IDX_PAP] = 0; 4818 sp->pp_rseq[IDX_PAP] = 0; 4819 callout_init(&sp->ch[IDX_PAP], 0); 4820 callout_init(&sp->pap_my_to_ch, 0); 4821 sppp_lock_exit(sp); 4822 } 4823 4824 static void 4825 sppp_pap_open(struct sppp *sp) 4826 { 4827 KASSERT(sppp_locked(sp)); 4828 4829 if (sp->hisauth.proto == PPP_PAP && 4830 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4831 /* we are authenticator for PAP, start our timer */ 4832 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4833 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4834 } 4835 if (sp->myauth.proto == PPP_PAP) { 4836 /* we are peer, send a request, and start a timer */ 4837 pap.scr(sp); 4838 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4839 sppp_pap_my_TO, sp); 4840 } 4841 } 4842 4843 static void 4844 sppp_pap_close(struct sppp *sp) 4845 { 4846 KASSERT(sppp_locked(sp)); 4847 if (sp->state[IDX_PAP] != STATE_CLOSED) 4848 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4849 } 4850 4851 /* 4852 * That's the timeout routine if we are authenticator. Since the 4853 * authenticator is basically passive in PAP, we can't do much here. 4854 */ 4855 static void 4856 sppp_pap_TO(void *cookie) 4857 { 4858 struct sppp *sp = (struct sppp *)cookie; 4859 STDDCL; 4860 int s; 4861 4862 KASSERT(!sppp_locked(sp)); 4863 4864 s = splnet(); 4865 sppp_lock_enter(sp); 4866 if (debug) 4867 log(LOG_DEBUG, "%s: pap TO(%s) rst_counter = %d\n", 4868 ifp->if_xname, 4869 sppp_state_name(sp->state[IDX_PAP]), 4870 sp->rst_counter[IDX_PAP]); 4871 4872 if (--sp->rst_counter[IDX_PAP] < 0) 4873 /* TO- event */ 4874 switch (sp->state[IDX_PAP]) { 4875 case STATE_REQ_SENT: 4876 pap.tld(sp); 4877 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4878 break; 4879 } 4880 else 4881 /* TO+ event, not very much we could do */ 4882 switch (sp->state[IDX_PAP]) { 4883 case STATE_REQ_SENT: 4884 /* sppp_cp_change_state() will restart the timer */ 4885 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4886 break; 4887 } 4888 4889 sppp_lock_exit(sp); 4890 splx(s); 4891 } 4892 4893 /* 4894 * That's the timeout handler if we are peer. Since the peer is active, 4895 * we need to retransmit our PAP request since it is apparently lost. 4896 * XXX We should impose a max counter. 4897 */ 4898 static void 4899 sppp_pap_my_TO(void *cookie) 4900 { 4901 struct sppp *sp = (struct sppp *)cookie; 4902 STDDCL; 4903 4904 KASSERT(!sppp_locked(sp)); 4905 4906 sppp_lock_enter(sp); 4907 if (debug) 4908 log(LOG_DEBUG, "%s: pap peer TO\n", 4909 ifp->if_xname); 4910 4911 pap.scr(sp); 4912 sppp_lock_exit(sp); 4913 } 4914 4915 static void 4916 sppp_pap_tlu(struct sppp *sp) 4917 { 4918 STDDCL; 4919 int x; 4920 4921 KASSERT(sppp_locked(sp)); 4922 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4923 4924 if (debug) 4925 log(LOG_DEBUG, "%s: %s tlu\n", 4926 ifp->if_xname, pap.name); 4927 4928 x = splnet(); 4929 sp->pp_auth_failures = 0; 4930 /* indicate to LCP that we need to be closed down */ 4931 sp->lcp.protos |= (1 << IDX_PAP); 4932 4933 if (sp->pp_flags & PP_NEEDAUTH) { 4934 /* 4935 * Remote is authenticator, but his auth proto didn't 4936 * complete yet. Defer the transition to network 4937 * phase. 4938 */ 4939 splx(x); 4940 return; 4941 } 4942 splx(x); 4943 sppp_phase_network(sp); 4944 } 4945 4946 static void 4947 sppp_pap_tld(struct sppp *sp) 4948 { 4949 STDDCL; 4950 4951 KASSERT(sppp_locked(sp)); 4952 4953 if (debug) 4954 log(LOG_DEBUG, "%s: pap tld\n", ifp->if_xname); 4955 callout_stop(&sp->ch[IDX_PAP]); 4956 callout_stop(&sp->pap_my_to_ch); 4957 sp->lcp.protos &= ~(1 << IDX_PAP); 4958 4959 lcp.Close(sp); 4960 } 4961 4962 static void 4963 sppp_pap_scr(struct sppp *sp) 4964 { 4965 u_char idlen, pwdlen; 4966 4967 KASSERT(sppp_locked(sp)); 4968 4969 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4970 /* can't do anything useful */ 4971 printf("%s: pap starting without my name and secret being set\n", 4972 sp->pp_if.if_xname); 4973 return; 4974 } 4975 4976 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4977 pwdlen = sp->myauth.secret_len; 4978 idlen = sp->myauth.name_len; 4979 4980 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 4981 sizeof idlen, (const char *)&idlen, 4982 idlen, sp->myauth.name, 4983 sizeof pwdlen, (const char *)&pwdlen, 4984 pwdlen, sp->myauth.secret, 4985 0); 4986 } 4987 4988 /* 4989 * Random miscellaneous functions. 4990 */ 4991 4992 /* 4993 * Send a PAP or CHAP proto packet. 4994 * 4995 * Varadic function, each of the elements for the ellipsis is of type 4996 * ``size_t mlen, const u_char *msg''. Processing will stop iff 4997 * mlen == 0. 4998 * NOTE: never declare variadic functions with types subject to type 4999 * promotion (i.e. u_char). This is asking for big trouble depending 5000 * on the architecture you are on... 5001 */ 5002 5003 static void 5004 sppp_auth_send(const struct cp *cp, struct sppp *sp, 5005 unsigned int type, unsigned int id, 5006 ...) 5007 { 5008 STDDCL; 5009 struct lcp_header *lh; 5010 struct mbuf *m; 5011 u_char *p; 5012 int len; 5013 size_t pkthdrlen; 5014 unsigned int mlen; 5015 const char *msg; 5016 va_list ap; 5017 5018 KASSERT(sppp_locked(sp)); 5019 5020 MGETHDR(m, M_DONTWAIT, MT_DATA); 5021 if (! m) 5022 return; 5023 m_reset_rcvif(m); 5024 5025 if (sp->pp_flags & PP_NOFRAMING) { 5026 *mtod(m, uint16_t *) = htons(cp->proto); 5027 pkthdrlen = 2; 5028 lh = (struct lcp_header *)(mtod(m, uint8_t *)+2); 5029 } else { 5030 struct ppp_header *h; 5031 h = mtod(m, struct ppp_header *); 5032 h->address = PPP_ALLSTATIONS; /* broadcast address */ 5033 h->control = PPP_UI; /* Unnumbered Info */ 5034 h->protocol = htons(cp->proto); 5035 pkthdrlen = PPP_HEADER_LEN; 5036 5037 lh = (struct lcp_header *)(h + 1); 5038 } 5039 5040 lh->type = type; 5041 lh->ident = id; 5042 p = (u_char *)(lh + 1); 5043 5044 va_start(ap, id); 5045 len = 0; 5046 5047 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 5048 msg = va_arg(ap, const char *); 5049 len += mlen; 5050 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 5051 va_end(ap); 5052 m_freem(m); 5053 return; 5054 } 5055 5056 memcpy(p, msg, mlen); 5057 p += mlen; 5058 } 5059 va_end(ap); 5060 5061 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 5062 lh->len = htons(LCP_HEADER_LEN + len); 5063 5064 if (debug) { 5065 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 5066 ifp->if_xname, cp->name, 5067 sppp_auth_type_name(cp->proto, lh->type), 5068 lh->ident, ntohs(lh->len)); 5069 if (len) 5070 sppp_print_bytes((u_char *)(lh + 1), len); 5071 addlog(">\n"); 5072 } 5073 if (IF_QFULL(&sp->pp_cpq)) { 5074 IF_DROP(&sp->pp_fastq); 5075 IF_DROP(&ifp->if_snd); 5076 m_freem(m); 5077 ++ifp->if_oerrors; 5078 return; 5079 } 5080 5081 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 5082 IF_ENQUEUE(&sp->pp_cpq, m); 5083 5084 if (! (ifp->if_flags & IFF_OACTIVE)) { 5085 sppp_lock_exit(sp); 5086 if_start_lock(ifp); 5087 sppp_lock_enter(sp); 5088 } 5089 } 5090 5091 /* 5092 * Send keepalive packets, every 10 seconds. 5093 */ 5094 static void 5095 sppp_keepalive(void *dummy) 5096 { 5097 struct sppp *sp; 5098 int s; 5099 time_t now; 5100 5101 SPPPQ_LOCK(); 5102 5103 s = splnet(); 5104 now = time_uptime; 5105 for (sp=spppq; sp; sp=sp->pp_next) { 5106 struct ifnet *ifp = NULL; 5107 5108 sppp_lock_enter(sp); 5109 ifp = &sp->pp_if; 5110 5111 /* check idle timeout */ 5112 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 5113 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 5114 /* idle timeout is enabled for this interface */ 5115 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 5116 if (ifp->if_flags & IFF_DEBUG) 5117 printf("%s: no activity for %lu seconds\n", 5118 sp->pp_if.if_xname, 5119 (unsigned long)(now-sp->pp_last_activity)); 5120 lcp.Close(sp); 5121 sppp_lock_exit(sp); 5122 continue; 5123 } 5124 } 5125 5126 /* Keepalive mode disabled or channel down? */ 5127 if (! (sp->pp_flags & PP_KEEPALIVE) || 5128 ! (ifp->if_flags & IFF_RUNNING)) { 5129 sppp_lock_exit(sp); 5130 continue; 5131 } 5132 5133 5134 /* No keepalive in PPP mode if LCP not opened yet. */ 5135 if (! (sp->pp_flags & PP_CISCO) && 5136 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 5137 sppp_lock_exit(sp); 5138 continue; 5139 } 5140 5141 /* No echo reply, but maybe user data passed through? */ 5142 if ((now - sp->pp_last_receive) < sp->pp_max_noreceive) { 5143 sp->pp_alivecnt = 0; 5144 sppp_lock_exit(sp); 5145 continue; 5146 } 5147 5148 if (sp->pp_alivecnt >= sp->pp_maxalive) { 5149 /* No keepalive packets got. Stop the interface. */ 5150 sppp_lock_exit(sp); 5151 if_down (ifp); 5152 sppp_lock_enter(sp); 5153 IF_PURGE(&sp->pp_cpq); 5154 if (! (sp->pp_flags & PP_CISCO)) { 5155 printf("%s: LCP keepalive timed out, going to restart the connection\n", 5156 ifp->if_xname); 5157 sp->pp_alivecnt = 0; 5158 5159 /* we are down, close all open protocols */ 5160 lcp.Close(sp); 5161 5162 /* And now prepare LCP to reestablish the link, if configured to do so. */ 5163 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 5164 5165 /* Close connection immediately, completition of this 5166 * will summon the magic needed to reestablish it. */ 5167 if (sp->pp_tlf) 5168 sp->pp_tlf(sp); 5169 5170 sppp_lock_exit(sp); 5171 continue; 5172 } 5173 } 5174 if (sp->pp_alivecnt < sp->pp_maxalive) 5175 ++sp->pp_alivecnt; 5176 if (sp->pp_flags & PP_CISCO) 5177 sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ, 5178 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 5179 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 5180 int32_t nmagic = htonl(sp->lcp.magic); 5181 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 5182 sppp_cp_send(sp, PPP_LCP, ECHO_REQ, 5183 sp->lcp.echoid, 4, &nmagic); 5184 } 5185 5186 sppp_lock_exit(sp); 5187 } 5188 splx(s); 5189 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 5190 5191 SPPPQ_UNLOCK(); 5192 } 5193 5194 #ifdef INET 5195 /* 5196 * Get both IP addresses. 5197 */ 5198 static void 5199 sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, uint32_t *srcmask) 5200 { 5201 struct ifnet *ifp = &sp->pp_if; 5202 struct ifaddr *ifa; 5203 struct sockaddr_in *si, *sm; 5204 uint32_t ssrc, ddst; 5205 5206 sm = NULL; 5207 ssrc = ddst = 0; 5208 /* 5209 * Pick the first AF_INET address from the list, 5210 * aliases don't make any sense on a p2p link anyway. 5211 */ 5212 si = 0; 5213 IFADDR_READER_FOREACH(ifa, ifp) { 5214 if (ifa->ifa_addr->sa_family == AF_INET) { 5215 si = (struct sockaddr_in *)ifa->ifa_addr; 5216 sm = (struct sockaddr_in *)ifa->ifa_netmask; 5217 if (si) 5218 break; 5219 } 5220 } 5221 if (ifa) { 5222 if (si && si->sin_addr.s_addr) { 5223 ssrc = si->sin_addr.s_addr; 5224 if (srcmask) 5225 *srcmask = ntohl(sm->sin_addr.s_addr); 5226 } 5227 5228 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 5229 if (si && si->sin_addr.s_addr) 5230 ddst = si->sin_addr.s_addr; 5231 } 5232 5233 if (dst) *dst = ntohl(ddst); 5234 if (src) *src = ntohl(ssrc); 5235 } 5236 5237 /* 5238 * Set IP addresses. Must be called at splnet. 5239 * If an address is 0, leave it the way it is. 5240 */ 5241 static void 5242 sppp_set_ip_addrs_work(struct work *wk, struct sppp *sp) 5243 { 5244 STDDCL; 5245 struct ifaddr *ifa; 5246 struct sockaddr_in *si, *dest; 5247 uint32_t myaddr = 0, hisaddr = 0; 5248 int s; 5249 5250 /* 5251 * Pick the first AF_INET address from the list, 5252 * aliases don't make any sense on a p2p link anyway. 5253 */ 5254 si = dest = NULL; 5255 s = pserialize_read_enter(); 5256 IFADDR_READER_FOREACH(ifa, ifp) { 5257 if (ifa->ifa_addr->sa_family == AF_INET) { 5258 si = (struct sockaddr_in *)ifa->ifa_addr; 5259 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5260 break; 5261 } 5262 } 5263 pserialize_read_exit(s); 5264 5265 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 5266 myaddr = sp->ipcp.req_myaddr; 5267 else if (si != NULL) 5268 myaddr = ntohl(si->sin_addr.s_addr); 5269 5270 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 5271 hisaddr = sp->ipcp.req_hisaddr; 5272 else if (dest != NULL) 5273 hisaddr = ntohl(dest->sin_addr.s_addr); 5274 5275 if (si != NULL && dest != NULL) { 5276 int error; 5277 struct sockaddr_in new_sin = *si; 5278 struct sockaddr_in new_dst = *dest; 5279 5280 if (myaddr != 0) 5281 new_sin.sin_addr.s_addr = htonl(myaddr); 5282 if (hisaddr != 0) { 5283 new_dst.sin_addr.s_addr = htonl(hisaddr); 5284 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) 5285 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 5286 } 5287 5288 in_addrhash_remove(ifatoia(ifa)); 5289 5290 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5291 5292 in_addrhash_insert(ifatoia(ifa)); 5293 5294 if (debug && error) 5295 { 5296 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5297 ifp->if_xname, __func__, error); 5298 } 5299 if (!error) { 5300 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5301 } 5302 } 5303 5304 if (ifp->if_mtu > sp->lcp.their_mru) { 5305 sp->pp_saved_mtu = ifp->if_mtu; 5306 ifp->if_mtu = sp->lcp.their_mru; 5307 if (debug) 5308 log(LOG_DEBUG, 5309 "%s: setting MTU to %" PRIu64 " bytes\n", 5310 ifp->if_xname, ifp->if_mtu); 5311 } 5312 5313 if (sp->pp_con) 5314 sp->pp_con(sp); 5315 } 5316 5317 static void 5318 sppp_set_ip_addrs(struct sppp *sp) 5319 { 5320 struct ifnet *ifp = &sp->pp_if; 5321 5322 if (!pcq_put(sp->ipcp.update_addrs_q, (void *)IPCP_SET_ADDRS)) { 5323 log(LOG_WARNING, "%s: cannot enqueued, ignore sppp_clear_ip_addrs\n", 5324 ifp->if_xname); 5325 return; 5326 } 5327 5328 if (atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1) == 1) 5329 return; 5330 5331 workqueue_enqueue(sp->ipcp.update_addrs_wq, &sp->ipcp.update_addrs_wk, NULL); 5332 } 5333 5334 /* 5335 * Clear IP addresses. Must be called at splnet. 5336 */ 5337 static void 5338 sppp_clear_ip_addrs_work(struct work *wk, struct sppp *sp) 5339 { 5340 STDDCL; 5341 struct ifaddr *ifa; 5342 struct sockaddr_in *si, *dest; 5343 int s; 5344 5345 /* 5346 * Pick the first AF_INET address from the list, 5347 * aliases don't make any sense on a p2p link anyway. 5348 */ 5349 si = dest = NULL; 5350 s = pserialize_read_enter(); 5351 IFADDR_READER_FOREACH(ifa, ifp) { 5352 if (ifa->ifa_addr->sa_family == AF_INET) { 5353 si = (struct sockaddr_in *)ifa->ifa_addr; 5354 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5355 break; 5356 } 5357 } 5358 pserialize_read_exit(s); 5359 5360 if (si != NULL) { 5361 struct sockaddr_in new_sin = *si; 5362 struct sockaddr_in new_dst = *dest; 5363 int error; 5364 5365 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 5366 new_sin.sin_addr.s_addr = 0; 5367 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 5368 new_dst.sin_addr.s_addr = sp->ipcp.saved_hisaddr; 5369 5370 in_addrhash_remove(ifatoia(ifa)); 5371 5372 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5373 5374 in_addrhash_insert(ifatoia(ifa)); 5375 5376 if (debug && error) 5377 { 5378 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5379 ifp->if_xname, __func__, error); 5380 } 5381 if (!error) { 5382 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5383 } 5384 } 5385 5386 if (sp->pp_saved_mtu > 0) { 5387 ifp->if_mtu = sp->pp_saved_mtu; 5388 sp->pp_saved_mtu = 0; 5389 if (debug) 5390 log(LOG_DEBUG, 5391 "%s: resetting MTU to %" PRIu64 " bytes\n", 5392 ifp->if_xname, ifp->if_mtu); 5393 } 5394 } 5395 5396 static void 5397 sppp_clear_ip_addrs(struct sppp *sp) 5398 { 5399 struct ifnet *ifp = &sp->pp_if; 5400 5401 if (!pcq_put(sp->ipcp.update_addrs_q, (void *)IPCP_CLEAR_ADDRS)) { 5402 log(LOG_WARNING, "%s: cannot enqueued, ignore sppp_clear_ip_addrs\n", 5403 ifp->if_xname); 5404 return; 5405 } 5406 5407 if (atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1) == 1) 5408 return; 5409 5410 workqueue_enqueue(sp->ipcp.update_addrs_wq, &sp->ipcp.update_addrs_wk, NULL); 5411 } 5412 5413 static void 5414 sppp_update_ip_addrs_work(struct work *wk, void *arg) 5415 { 5416 struct sppp *sp = arg; 5417 void *work; 5418 5419 atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 0); 5420 5421 while ((work = pcq_get(sp->ipcp.update_addrs_q)) != NULL) { 5422 int update = (intptr_t)work; 5423 5424 if (update == IPCP_SET_ADDRS) 5425 sppp_set_ip_addrs_work(wk, sp); 5426 else if (update == IPCP_CLEAR_ADDRS) 5427 sppp_clear_ip_addrs_work(wk, sp); 5428 } 5429 } 5430 #endif 5431 5432 #ifdef INET6 5433 /* 5434 * Get both IPv6 addresses. 5435 */ 5436 static void 5437 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 5438 struct in6_addr *srcmask) 5439 { 5440 struct ifnet *ifp = &sp->pp_if; 5441 struct ifaddr *ifa; 5442 struct sockaddr_in6 *si, *sm; 5443 struct in6_addr ssrc, ddst; 5444 5445 sm = NULL; 5446 memset(&ssrc, 0, sizeof(ssrc)); 5447 memset(&ddst, 0, sizeof(ddst)); 5448 /* 5449 * Pick the first link-local AF_INET6 address from the list, 5450 * aliases don't make any sense on a p2p link anyway. 5451 */ 5452 si = 0; 5453 IFADDR_READER_FOREACH(ifa, ifp) 5454 if (ifa->ifa_addr->sa_family == AF_INET6) { 5455 si = (struct sockaddr_in6 *)ifa->ifa_addr; 5456 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 5457 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) 5458 break; 5459 } 5460 if (ifa) { 5461 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 5462 memcpy(&ssrc, &si->sin6_addr, sizeof(ssrc)); 5463 if (srcmask) { 5464 memcpy(srcmask, &sm->sin6_addr, 5465 sizeof(*srcmask)); 5466 } 5467 } 5468 5469 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 5470 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 5471 memcpy(&ddst, &si->sin6_addr, sizeof(ddst)); 5472 } 5473 5474 if (dst) 5475 memcpy(dst, &ddst, sizeof(*dst)); 5476 if (src) 5477 memcpy(src, &ssrc, sizeof(*src)); 5478 } 5479 5480 #ifdef IPV6CP_MYIFID_DYN 5481 /* 5482 * Generate random ifid. 5483 */ 5484 static void 5485 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 5486 { 5487 /* TBD */ 5488 } 5489 5490 /* 5491 * Set my IPv6 address. Must be called at splnet. 5492 */ 5493 static void 5494 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 5495 { 5496 STDDCL; 5497 struct ifaddr *ifa; 5498 struct sockaddr_in6 *sin6; 5499 5500 /* 5501 * Pick the first link-local AF_INET6 address from the list, 5502 * aliases don't make any sense on a p2p link anyway. 5503 */ 5504 5505 sin6 = NULL; 5506 IFADDR_READER_FOREACH(ifa, ifp) 5507 { 5508 if (ifa->ifa_addr->sa_family == AF_INET6) 5509 { 5510 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 5511 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 5512 break; 5513 } 5514 } 5515 5516 if (ifa && sin6) 5517 { 5518 int error; 5519 struct sockaddr_in6 new_sin6 = *sin6; 5520 5521 memcpy(&new_sin6.sin6_addr, src, sizeof(new_sin6.sin6_addr)); 5522 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 5523 if (debug && error) 5524 { 5525 log(LOG_DEBUG, "%s: %s: in6_ifinit failed, error=%d\n", 5526 ifp->if_xname, __func__, error); 5527 } 5528 if (!error) { 5529 pfil_run_addrhooks(if_pfil, SIOCAIFADDR_IN6, ifa); 5530 } 5531 } 5532 } 5533 #endif 5534 5535 /* 5536 * Suggest a candidate address to be used by peer. 5537 */ 5538 static void 5539 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 5540 { 5541 struct in6_addr myaddr; 5542 struct timeval tv; 5543 5544 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 5545 5546 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 5547 microtime(&tv); 5548 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 5549 myaddr.s6_addr[14] ^= 0xff; 5550 myaddr.s6_addr[15] ^= 0xff; 5551 } else { 5552 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 5553 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 5554 } 5555 if (suggest) 5556 memcpy(suggest, &myaddr, sizeof(myaddr)); 5557 } 5558 #endif /*INET6*/ 5559 5560 /* 5561 * Process ioctl requests specific to the PPP interface. 5562 * Permissions have already been checked. 5563 */ 5564 static int 5565 sppp_params(struct sppp *sp, u_long cmd, void *data) 5566 { 5567 switch (cmd) { 5568 case SPPPGETAUTHCFG: 5569 { 5570 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5571 int error; 5572 size_t len; 5573 5574 sppp_lock_enter(sp); 5575 5576 cfg->myauthflags = sp->myauth.flags; 5577 cfg->hisauthflags = sp->hisauth.flags; 5578 strlcpy(cfg->ifname, sp->pp_if.if_xname, sizeof(cfg->ifname)); 5579 cfg->hisauth = 0; 5580 if (sp->hisauth.proto) 5581 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5582 cfg->myauth = 0; 5583 if (sp->myauth.proto) 5584 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5585 if (cfg->myname_length == 0) { 5586 if (sp->myauth.name != NULL) 5587 cfg->myname_length = sp->myauth.name_len + 1; 5588 } else { 5589 if (sp->myauth.name == NULL) { 5590 cfg->myname_length = 0; 5591 } else { 5592 len = sp->myauth.name_len + 1; 5593 5594 sppp_lock_exit(sp); 5595 5596 if (cfg->myname_length < len) 5597 return (ENAMETOOLONG); 5598 error = copyout(sp->myauth.name, cfg->myname, len); 5599 if (error) return error; 5600 5601 sppp_lock_enter(sp); 5602 } 5603 } 5604 if (cfg->hisname_length == 0) { 5605 if (sp->hisauth.name != NULL) 5606 cfg->hisname_length = sp->hisauth.name_len + 1; 5607 } else { 5608 if (sp->hisauth.name == NULL) { 5609 cfg->hisname_length = 0; 5610 } else { 5611 len = sp->hisauth.name_len + 1; 5612 5613 sppp_lock_exit(sp); 5614 if (cfg->hisname_length < len) 5615 return (ENAMETOOLONG); 5616 error = copyout(sp->hisauth.name, cfg->hisname, len); 5617 if (error) return error; 5618 sppp_lock_enter(sp); 5619 } 5620 } 5621 sppp_lock_exit(sp); 5622 } 5623 break; 5624 case SPPPSETAUTHCFG: 5625 { 5626 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5627 int error; 5628 5629 sppp_lock_enter(sp); 5630 5631 if (sp->myauth.name) { 5632 free(sp->myauth.name, M_DEVBUF); 5633 sp->myauth.name = NULL; 5634 } 5635 if (sp->myauth.secret) { 5636 free(sp->myauth.secret, M_DEVBUF); 5637 sp->myauth.secret = NULL; 5638 } 5639 if (sp->hisauth.name) { 5640 free(sp->hisauth.name, M_DEVBUF); 5641 sp->hisauth.name = NULL; 5642 } 5643 if (sp->hisauth.secret) { 5644 free(sp->hisauth.secret, M_DEVBUF); 5645 sp->hisauth.secret = NULL; 5646 } 5647 5648 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5649 if (cfg->hisname_length >= MCLBYTES) { 5650 sppp_lock_exit(sp); 5651 return (ENAMETOOLONG); 5652 } 5653 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5654 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5655 if (error) { 5656 free(sp->hisauth.name, M_DEVBUF); 5657 sp->hisauth.name = NULL; 5658 sppp_lock_exit(sp); 5659 return error; 5660 } 5661 sp->hisauth.name_len = cfg->hisname_length - 1; 5662 sp->hisauth.name[sp->hisauth.name_len] = 0; 5663 } 5664 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5665 if (cfg->hissecret_length >= MCLBYTES) { 5666 sppp_lock_exit(sp); 5667 return (ENAMETOOLONG); 5668 } 5669 sp->hisauth.secret = malloc(cfg->hissecret_length, 5670 M_DEVBUF, M_WAITOK); 5671 error = copyin(cfg->hissecret, sp->hisauth.secret, 5672 cfg->hissecret_length); 5673 if (error) { 5674 free(sp->hisauth.secret, M_DEVBUF); 5675 sp->hisauth.secret = NULL; 5676 sppp_lock_exit(sp); 5677 return error; 5678 } 5679 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5680 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5681 } 5682 if (cfg->myname != NULL && cfg->myname_length > 0) { 5683 if (cfg->myname_length >= MCLBYTES) { 5684 sppp_lock_exit(sp); 5685 return (ENAMETOOLONG); 5686 } 5687 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5688 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5689 if (error) { 5690 free(sp->myauth.name, M_DEVBUF); 5691 sp->myauth.name = NULL; 5692 sppp_lock_exit(sp); 5693 return error; 5694 } 5695 sp->myauth.name_len = cfg->myname_length - 1; 5696 sp->myauth.name[sp->myauth.name_len] = 0; 5697 } 5698 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5699 if (cfg->mysecret_length >= MCLBYTES) { 5700 sppp_lock_exit(sp); 5701 return (ENAMETOOLONG); 5702 } 5703 sp->myauth.secret = malloc(cfg->mysecret_length, 5704 M_DEVBUF, M_WAITOK); 5705 error = copyin(cfg->mysecret, sp->myauth.secret, 5706 cfg->mysecret_length); 5707 if (error) { 5708 free(sp->myauth.secret, M_DEVBUF); 5709 sp->myauth.secret = NULL; 5710 sppp_lock_exit(sp); 5711 return error; 5712 } 5713 sp->myauth.secret_len = cfg->mysecret_length - 1; 5714 sp->myauth.secret[sp->myauth.secret_len] = 0; 5715 } 5716 sp->myauth.flags = cfg->myauthflags; 5717 if (cfg->myauth) 5718 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5719 sp->hisauth.flags = cfg->hisauthflags; 5720 if (cfg->hisauth) 5721 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5722 sp->pp_auth_failures = 0; 5723 if (sp->hisauth.proto != 0) 5724 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 5725 else 5726 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 5727 5728 sppp_lock_exit(sp); 5729 } 5730 break; 5731 case SPPPGETLCPCFG: 5732 { 5733 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5734 sppp_lock_enter(sp); 5735 lcpp->lcp_timeout = sp->lcp.timeout; 5736 sppp_lock_exit(sp); 5737 } 5738 break; 5739 case SPPPSETLCPCFG: 5740 { 5741 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5742 sppp_lock_enter(sp); 5743 sp->lcp.timeout = lcpp->lcp_timeout; 5744 sppp_lock_exit(sp); 5745 } 5746 break; 5747 case SPPPGETSTATUS: 5748 { 5749 struct spppstatus *status = (struct spppstatus *)data; 5750 sppp_lock_enter(sp); 5751 status->phase = sp->pp_phase; 5752 sppp_lock_exit(sp); 5753 } 5754 break; 5755 case SPPPGETSTATUSNCP: 5756 { 5757 struct spppstatusncp *status = (struct spppstatusncp *)data; 5758 sppp_lock_enter(sp); 5759 status->phase = sp->pp_phase; 5760 sppp_lock_exit(sp); 5761 status->ncpup = sppp_ncp_check(sp); 5762 } 5763 break; 5764 case SPPPGETIDLETO: 5765 { 5766 struct spppidletimeout *to = (struct spppidletimeout *)data; 5767 sppp_lock_enter(sp); 5768 to->idle_seconds = sp->pp_idle_timeout; 5769 sppp_lock_exit(sp); 5770 } 5771 break; 5772 case SPPPSETIDLETO: 5773 { 5774 struct spppidletimeout *to = (struct spppidletimeout *)data; 5775 sppp_lock_enter(sp); 5776 sp->pp_idle_timeout = to->idle_seconds; 5777 sppp_lock_exit(sp); 5778 } 5779 break; 5780 case SPPPSETAUTHFAILURE: 5781 { 5782 struct spppauthfailuresettings *afsettings = (struct spppauthfailuresettings *)data; 5783 sppp_lock_enter(sp); 5784 sp->pp_max_auth_fail = afsettings->max_failures; 5785 sp->pp_auth_failures = 0; 5786 sppp_lock_exit(sp); 5787 } 5788 break; 5789 case SPPPGETAUTHFAILURES: 5790 { 5791 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5792 sppp_lock_enter(sp); 5793 stats->auth_failures = sp->pp_auth_failures; 5794 stats->max_failures = sp->pp_max_auth_fail; 5795 sppp_lock_exit(sp); 5796 } 5797 break; 5798 case SPPPSETDNSOPTS: 5799 { 5800 struct spppdnssettings *req = (struct spppdnssettings *)data; 5801 sppp_lock_enter(sp); 5802 sp->query_dns = req->query_dns & 3; 5803 sppp_lock_exit(sp); 5804 } 5805 break; 5806 case SPPPGETDNSOPTS: 5807 { 5808 struct spppdnssettings *req = (struct spppdnssettings *)data; 5809 sppp_lock_enter(sp); 5810 req->query_dns = sp->query_dns; 5811 sppp_lock_exit(sp); 5812 } 5813 break; 5814 case SPPPGETDNSADDRS: 5815 { 5816 struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data; 5817 sppp_lock_enter(sp); 5818 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5819 sppp_lock_exit(sp); 5820 } 5821 break; 5822 case SPPPGETKEEPALIVE: 5823 { 5824 struct spppkeepalivesettings *settings = 5825 (struct spppkeepalivesettings*)data; 5826 sppp_lock_enter(sp); 5827 settings->maxalive = sp->pp_maxalive; 5828 settings->max_noreceive = sp->pp_max_noreceive; 5829 sppp_lock_exit(sp); 5830 } 5831 break; 5832 case SPPPSETKEEPALIVE: 5833 { 5834 struct spppkeepalivesettings *settings = 5835 (struct spppkeepalivesettings*)data; 5836 sppp_lock_enter(sp); 5837 sp->pp_maxalive = settings->maxalive; 5838 sp->pp_max_noreceive = settings->max_noreceive; 5839 sppp_lock_exit(sp); 5840 } 5841 break; 5842 #if defined(COMPAT_50) || defined(MODULAR) 5843 case __SPPPGETIDLETO50: 5844 { 5845 struct spppidletimeout50 *to = (struct spppidletimeout50 *)data; 5846 sppp_lock_enter(sp); 5847 to->idle_seconds = (uint32_t)sp->pp_idle_timeout; 5848 sppp_lock_exit(sp); 5849 } 5850 break; 5851 case __SPPPSETIDLETO50: 5852 { 5853 struct spppidletimeout50 *to = (struct spppidletimeout50 *)data; 5854 sppp_lock_enter(sp); 5855 sp->pp_idle_timeout = (time_t)to->idle_seconds; 5856 sppp_lock_exit(sp); 5857 } 5858 break; 5859 case __SPPPGETKEEPALIVE50: 5860 { 5861 struct spppkeepalivesettings50 *settings = 5862 (struct spppkeepalivesettings50*)data; 5863 sppp_lock_enter(sp); 5864 settings->maxalive = sp->pp_maxalive; 5865 settings->max_noreceive = (uint32_t)sp->pp_max_noreceive; 5866 sppp_lock_exit(sp); 5867 } 5868 break; 5869 case __SPPPSETKEEPALIVE50: 5870 { 5871 struct spppkeepalivesettings50 *settings = 5872 (struct spppkeepalivesettings50*)data; 5873 sppp_lock_enter(sp); 5874 sp->pp_maxalive = settings->maxalive; 5875 sp->pp_max_noreceive = (time_t)settings->max_noreceive; 5876 sppp_lock_exit(sp); 5877 } 5878 break; 5879 #endif /* COMPAT_50 || MODULAR */ 5880 default: 5881 return (EINVAL); 5882 } 5883 5884 return (0); 5885 } 5886 5887 static void 5888 sppp_phase_network(struct sppp *sp) 5889 { 5890 int i; 5891 uint32_t mask; 5892 5893 KASSERT(sppp_locked(sp)); 5894 5895 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 5896 5897 /* Notify NCPs now. */ 5898 for (i = 0; i < IDX_COUNT; i++) 5899 if ((cps[i])->flags & CP_NCP) 5900 (cps[i])->Open(sp); 5901 5902 /* Send Up events to all NCPs. */ 5903 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5904 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) { 5905 (cps[i])->Up(sp); 5906 } 5907 5908 /* if no NCP is starting, all this was in vain, close down */ 5909 sppp_lcp_check_and_close(sp); 5910 } 5911 5912 5913 static const char * 5914 sppp_cp_type_name(u_char type) 5915 { 5916 static char buf[12]; 5917 switch (type) { 5918 case CONF_REQ: return "conf-req"; 5919 case CONF_ACK: return "conf-ack"; 5920 case CONF_NAK: return "conf-nak"; 5921 case CONF_REJ: return "conf-rej"; 5922 case TERM_REQ: return "term-req"; 5923 case TERM_ACK: return "term-ack"; 5924 case CODE_REJ: return "code-rej"; 5925 case PROTO_REJ: return "proto-rej"; 5926 case ECHO_REQ: return "echo-req"; 5927 case ECHO_REPLY: return "echo-reply"; 5928 case DISC_REQ: return "discard-req"; 5929 } 5930 snprintf(buf, sizeof(buf), "0x%x", type); 5931 return buf; 5932 } 5933 5934 static const char * 5935 sppp_auth_type_name(u_short proto, u_char type) 5936 { 5937 static char buf[32]; 5938 const char *name; 5939 5940 switch (proto) { 5941 case PPP_CHAP: 5942 switch (type) { 5943 case CHAP_CHALLENGE: return "challenge"; 5944 case CHAP_RESPONSE: return "response"; 5945 case CHAP_SUCCESS: return "success"; 5946 case CHAP_FAILURE: return "failure"; 5947 default: name = "chap"; break; 5948 } 5949 break; 5950 5951 case PPP_PAP: 5952 switch (type) { 5953 case PAP_REQ: return "req"; 5954 case PAP_ACK: return "ack"; 5955 case PAP_NAK: return "nak"; 5956 default: name = "pap"; break; 5957 } 5958 break; 5959 5960 default: 5961 name = "bad"; 5962 break; 5963 } 5964 5965 snprintf(buf, sizeof(buf), "%s(%#x) %#x", name, proto, type); 5966 return buf; 5967 } 5968 5969 static const char * 5970 sppp_lcp_opt_name(u_char opt) 5971 { 5972 static char buf[12]; 5973 switch (opt) { 5974 case LCP_OPT_MRU: return "mru"; 5975 case LCP_OPT_ASYNC_MAP: return "async-map"; 5976 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 5977 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 5978 case LCP_OPT_MAGIC: return "magic"; 5979 case LCP_OPT_PROTO_COMP: return "proto-comp"; 5980 case LCP_OPT_ADDR_COMP: return "addr-comp"; 5981 } 5982 snprintf(buf, sizeof(buf), "0x%x", opt); 5983 return buf; 5984 } 5985 5986 static const char * 5987 sppp_ipcp_opt_name(u_char opt) 5988 { 5989 static char buf[12]; 5990 switch (opt) { 5991 case IPCP_OPT_ADDRESSES: return "addresses"; 5992 case IPCP_OPT_COMPRESSION: return "compression"; 5993 case IPCP_OPT_ADDRESS: return "address"; 5994 } 5995 snprintf(buf, sizeof(buf), "0x%x", opt); 5996 return buf; 5997 } 5998 5999 #ifdef INET6 6000 static const char * 6001 sppp_ipv6cp_opt_name(u_char opt) 6002 { 6003 static char buf[12]; 6004 switch (opt) { 6005 case IPV6CP_OPT_IFID: return "ifid"; 6006 case IPV6CP_OPT_COMPRESSION: return "compression"; 6007 } 6008 snprintf(buf, sizeof(buf), "0x%x", opt); 6009 return buf; 6010 } 6011 #endif 6012 6013 static const char * 6014 sppp_state_name(int state) 6015 { 6016 switch (state) { 6017 case STATE_INITIAL: return "initial"; 6018 case STATE_STARTING: return "starting"; 6019 case STATE_CLOSED: return "closed"; 6020 case STATE_STOPPED: return "stopped"; 6021 case STATE_CLOSING: return "closing"; 6022 case STATE_STOPPING: return "stopping"; 6023 case STATE_REQ_SENT: return "req-sent"; 6024 case STATE_ACK_RCVD: return "ack-rcvd"; 6025 case STATE_ACK_SENT: return "ack-sent"; 6026 case STATE_OPENED: return "opened"; 6027 } 6028 return "illegal"; 6029 } 6030 6031 static const char * 6032 sppp_phase_name(int phase) 6033 { 6034 switch (phase) { 6035 case SPPP_PHASE_DEAD: return "dead"; 6036 case SPPP_PHASE_ESTABLISH: return "establish"; 6037 case SPPP_PHASE_TERMINATE: return "terminate"; 6038 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 6039 case SPPP_PHASE_NETWORK: return "network"; 6040 } 6041 return "illegal"; 6042 } 6043 6044 static const char * 6045 sppp_proto_name(u_short proto) 6046 { 6047 static char buf[12]; 6048 switch (proto) { 6049 case PPP_LCP: return "lcp"; 6050 case PPP_IPCP: return "ipcp"; 6051 case PPP_PAP: return "pap"; 6052 case PPP_CHAP: return "chap"; 6053 case PPP_IPV6CP: return "ipv6cp"; 6054 } 6055 snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto); 6056 return buf; 6057 } 6058 6059 static void 6060 sppp_print_bytes(const u_char *p, u_short len) 6061 { 6062 addlog(" %02x", *p++); 6063 while (--len > 0) 6064 addlog("-%02x", *p++); 6065 } 6066 6067 static void 6068 sppp_print_string(const char *p, u_short len) 6069 { 6070 u_char c; 6071 6072 while (len-- > 0) { 6073 c = *p++; 6074 /* 6075 * Print only ASCII chars directly. RFC 1994 recommends 6076 * using only them, but we don't rely on it. */ 6077 if (c < ' ' || c > '~') 6078 addlog("\\x%x", c); 6079 else 6080 addlog("%c", c); 6081 } 6082 } 6083 6084 static const char * 6085 sppp_dotted_quad(uint32_t addr) 6086 { 6087 static char s[16]; 6088 snprintf(s, sizeof(s), "%d.%d.%d.%d", 6089 (int)((addr >> 24) & 0xff), 6090 (int)((addr >> 16) & 0xff), 6091 (int)((addr >> 8) & 0xff), 6092 (int)(addr & 0xff)); 6093 return s; 6094 } 6095 6096 /* a dummy, used to drop uninteresting events */ 6097 static void 6098 sppp_null(struct sppp *unused) 6099 { 6100 /* do just nothing */ 6101 } 6102 /* 6103 * This file is large. Tell emacs to highlight it nevertheless. 6104 * 6105 * Local Variables: 6106 * hilit-auto-highlight-maxout: 120000 6107 * End: 6108 */ 6109 6110 /* 6111 * Module glue 6112 */ 6113 MODULE(MODULE_CLASS_MISC, sppp_subr, NULL); 6114 6115 static int 6116 sppp_subr_modcmd(modcmd_t cmd, void *arg) 6117 { 6118 switch (cmd) { 6119 case MODULE_CMD_INIT: 6120 case MODULE_CMD_FINI: 6121 return 0; 6122 case MODULE_CMD_STAT: 6123 case MODULE_CMD_AUTOUNLOAD: 6124 default: 6125 return ENOTTY; 6126 } 6127 } 6128 6129
Indexes created Sat Sep 27 14:09:57 GMT 2025