if_spppsubr.c revision 1.146.2.2
1 /* $NetBSD: if_spppsubr.c,v 1.146.2.2 2017/01/07 08:56:50 pgoyette 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 1.146.2.2 2017/01/07 08:56:50 pgoyette 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; 719 720 s = splnet(); 721 722 sppp_lock_enter(sp); 723 sp->pp_last_activity = time_uptime; 724 725 if ((ifp->if_flags & IFF_UP) == 0 || 726 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 727 sppp_lock_exit(sp); 728 m_freem(m); 729 splx(s); 730 return (ENETDOWN); 731 } 732 733 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 734 /* 735 * Interface is not yet running, but auto-dial. Need 736 * to start LCP for it. 737 */ 738 ifp->if_flags |= IFF_RUNNING; 739 splx(s); 740 lcp.Open(sp); 741 s = splnet(); 742 } 743 744 /* 745 * If the queueing discipline needs packet classification, 746 * do it before prepending link headers. 747 */ 748 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family); 749 750 #ifdef INET 751 if (dst->sa_family == AF_INET) { 752 struct ip *ip = NULL; 753 #ifndef SPPPSUBR_MPSAFE 754 struct tcphdr *th = NULL; 755 #endif 756 757 if (m->m_len >= sizeof(struct ip)) { 758 ip = mtod(m, struct ip *); 759 #ifndef SPPPSUBR_MPSAFE 760 if (ip->ip_p == IPPROTO_TCP && 761 m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) + 762 sizeof(struct tcphdr)) { 763 th = (struct tcphdr *) 764 ((char *)ip + (ip->ip_hl << 2)); 765 } 766 #endif 767 } else 768 ip = NULL; 769 770 /* 771 * When using dynamic local IP address assignment by using 772 * 0.0.0.0 as a local address, the first TCP session will 773 * not connect because the local TCP checksum is computed 774 * using 0.0.0.0 which will later become our real IP address 775 * so the TCP checksum computed at the remote end will 776 * become invalid. So we 777 * - don't let packets with src ip addr 0 thru 778 * - we flag TCP packets with src ip 0 as an error 779 */ 780 if (ip && ip->ip_src.s_addr == INADDR_ANY) { 781 uint8_t proto = ip->ip_p; 782 783 sppp_lock_exit(sp); 784 m_freem(m); 785 splx(s); 786 if (proto == IPPROTO_TCP) 787 return (EADDRNOTAVAIL); 788 else 789 return (0); 790 } 791 792 #ifndef SPPPSUBR_MPSAFE 793 /* 794 * Put low delay, telnet, rlogin and ftp control packets 795 * in front of the queue. 796 */ 797 if (!IF_QFULL(&sp->pp_fastq) && 798 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || 799 (th && (INTERACTIVE(ntohs(th->th_sport)) || 800 INTERACTIVE(ntohs(th->th_dport)))))) 801 ifq = &sp->pp_fastq; 802 #endif /* !SPPPSUBR_MPSAFE */ 803 } 804 #endif 805 806 #ifdef INET6 807 if (dst->sa_family == AF_INET6) { 808 /* XXX do something tricky here? */ 809 } 810 #endif 811 812 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 813 /* 814 * Prepend general data packet PPP header. For now, IP only. 815 */ 816 M_PREPEND(m, PPP_HEADER_LEN, M_DONTWAIT); 817 if (! m) { 818 if (ifp->if_flags & IFF_DEBUG) 819 log(LOG_DEBUG, "%s: no memory for transmit header\n", 820 ifp->if_xname); 821 ++ifp->if_oerrors; 822 sppp_lock_exit(sp); 823 splx(s); 824 return (ENOBUFS); 825 } 826 /* 827 * May want to check size of packet 828 * (albeit due to the implementation it's always enough) 829 */ 830 h = mtod(m, struct ppp_header *); 831 if (sp->pp_flags & PP_CISCO) { 832 h->address = CISCO_UNICAST; /* unicast address */ 833 h->control = 0; 834 } else { 835 h->address = PPP_ALLSTATIONS; /* broadcast address */ 836 h->control = PPP_UI; /* Unnumbered Info */ 837 } 838 } 839 840 switch (dst->sa_family) { 841 #ifdef INET 842 case AF_INET: /* Internet Protocol */ 843 if (sp->pp_flags & PP_CISCO) 844 protocol = htons(ETHERTYPE_IP); 845 else { 846 /* 847 * Don't choke with an ENETDOWN early. It's 848 * possible that we just started dialing out, 849 * so don't drop the packet immediately. If 850 * we notice that we run out of buffer space 851 * below, we will however remember that we are 852 * not ready to carry IP packets, and return 853 * ENETDOWN, as opposed to ENOBUFS. 854 */ 855 protocol = htons(PPP_IP); 856 if (sp->state[IDX_IPCP] != STATE_OPENED) 857 error = ENETDOWN; 858 } 859 break; 860 #endif 861 #ifdef INET6 862 case AF_INET6: /* Internet Protocol version 6 */ 863 if (sp->pp_flags & PP_CISCO) 864 protocol = htons(ETHERTYPE_IPV6); 865 else { 866 /* 867 * Don't choke with an ENETDOWN early. It's 868 * possible that we just started dialing out, 869 * so don't drop the packet immediately. If 870 * we notice that we run out of buffer space 871 * below, we will however remember that we are 872 * not ready to carry IP packets, and return 873 * ENETDOWN, as opposed to ENOBUFS. 874 */ 875 protocol = htons(PPP_IPV6); 876 if (sp->state[IDX_IPV6CP] != STATE_OPENED) 877 error = ENETDOWN; 878 } 879 break; 880 #endif 881 default: 882 m_freem(m); 883 ++ifp->if_oerrors; 884 sppp_lock_exit(sp); 885 splx(s); 886 return (EAFNOSUPPORT); 887 } 888 889 if (sp->pp_flags & PP_NOFRAMING) { 890 M_PREPEND(m, 2, M_DONTWAIT); 891 if (m == NULL) { 892 if (ifp->if_flags & IFF_DEBUG) 893 log(LOG_DEBUG, "%s: no memory for transmit header\n", 894 ifp->if_xname); 895 ++ifp->if_oerrors; 896 sppp_lock_exit(sp); 897 splx(s); 898 return (ENOBUFS); 899 } 900 *mtod(m, uint16_t *) = protocol; 901 } else { 902 h->protocol = protocol; 903 } 904 905 906 #ifdef SPPPSUBR_MPSAFE 907 error = if_transmit_lock(ifp, m); 908 if (error == 0) 909 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 910 #else /* !SPPPSUBR_MPSAFE */ 911 error = ifq_enqueue2(ifp, ifq, m); 912 913 if (error == 0) { 914 /* 915 * Count output packets and bytes. 916 * The packet length includes header + additional hardware 917 * framing according to RFC 1333. 918 */ 919 if (!(ifp->if_flags & IFF_OACTIVE)) { 920 sppp_lock_exit(sp); 921 if_start_lock(ifp); 922 sppp_lock_enter(sp); 923 } 924 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 925 } 926 #endif /* !SPPPSUBR_MPSAFE */ 927 sppp_lock_exit(sp); 928 splx(s); 929 return error; 930 } 931 932 static int 933 sppp_mediachange(struct ifnet *ifp) 934 { 935 936 return (0); 937 } 938 939 static void 940 sppp_mediastatus(struct ifnet *ifp, struct ifmediareq *imr) 941 { 942 struct sppp *sp = (struct sppp *)ifp; 943 KASSERT(!sppp_locked(sp)); 944 945 sppp_lock_enter(sp); 946 switch (ifp->if_link_state) { 947 case LINK_STATE_UP: 948 imr->ifm_status = IFM_AVALID | IFM_ACTIVE; 949 break; 950 case LINK_STATE_DOWN: 951 imr->ifm_status = IFM_AVALID; 952 break; 953 default: 954 /* Should be impossible as we set link state down in attach. */ 955 imr->ifm_status = 0; 956 break; 957 } 958 sppp_lock_exit(sp); 959 } 960 961 void 962 sppp_attach(struct ifnet *ifp) 963 { 964 struct sppp *sp = (struct sppp *) ifp; 965 966 /* Initialize keepalive handler. */ 967 if (! spppq) { 968 callout_init(&keepalive_ch, 0); 969 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 970 } 971 972 if (! spppq_lock) 973 spppq_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_SOFTNET); 974 975 /* Insert new entry into the keepalive list. */ 976 sp->pp_next = spppq; 977 spppq = sp; 978 979 sp->pp_if.if_type = IFT_PPP; 980 sp->pp_if.if_output = sppp_output; 981 sp->pp_fastq.ifq_maxlen = 32; 982 sp->pp_cpq.ifq_maxlen = 20; 983 sp->pp_loopcnt = 0; 984 sp->pp_alivecnt = 0; 985 sp->pp_last_activity = 0; 986 sp->pp_last_receive = 0; 987 sp->pp_maxalive = DEFAULT_MAXALIVECNT; 988 sp->pp_max_noreceive = DEFAULT_NORECV_TIME; 989 sp->pp_idle_timeout = 0; 990 memset(&sp->pp_seq[0], 0, sizeof(sp->pp_seq)); 991 memset(&sp->pp_rseq[0], 0, sizeof(sp->pp_rseq)); 992 sp->pp_auth_failures = 0; 993 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 994 sp->pp_phase = SPPP_PHASE_DEAD; 995 sp->pp_up = lcp.Up; 996 sp->pp_down = lcp.Down; 997 sp->pp_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_SOFTNET); 998 999 if_alloc_sadl(ifp); 1000 1001 /* Lets not beat about the bush, we know we're down. */ 1002 ifp->if_link_state = LINK_STATE_DOWN; 1003 /* There is no media for PPP, but it's needed to report link status. */ 1004 ifmedia_init(&sp->pp_im, 0, sppp_mediachange, sppp_mediastatus); 1005 1006 memset(&sp->myauth, 0, sizeof sp->myauth); 1007 memset(&sp->hisauth, 0, sizeof sp->hisauth); 1008 sppp_lcp_init(sp); 1009 sppp_ipcp_init(sp); 1010 sppp_ipv6cp_init(sp); 1011 sppp_pap_init(sp); 1012 sppp_chap_init(sp); 1013 } 1014 1015 void 1016 sppp_detach(struct ifnet *ifp) 1017 { 1018 struct sppp **q, *p, *sp = (struct sppp *) ifp; 1019 1020 sppp_lock_enter(sp); 1021 /* Remove the entry from the keepalive list. */ 1022 SPPPQ_LOCK(); 1023 for (q = &spppq; (p = *q); q = &p->pp_next) 1024 if (p == sp) { 1025 *q = p->pp_next; 1026 break; 1027 } 1028 1029 /* to avoid workqueue enqueued */ 1030 atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1); 1031 workqueue_destroy(sp->ipcp.update_addrs_wq); 1032 pcq_destroy(sp->ipcp.update_addrs_q); 1033 1034 /* Stop keepalive handler. */ 1035 if (! spppq) { 1036 callout_stop(&keepalive_ch); 1037 } 1038 SPPPQ_UNLOCK(); 1039 1040 callout_stop(&sp->ch[IDX_LCP]); 1041 callout_stop(&sp->ch[IDX_IPCP]); 1042 callout_stop(&sp->ch[IDX_PAP]); 1043 callout_stop(&sp->ch[IDX_CHAP]); 1044 #ifdef INET6 1045 callout_stop(&sp->ch[IDX_IPV6CP]); 1046 #endif 1047 callout_stop(&sp->pap_my_to_ch); 1048 1049 /* free authentication info */ 1050 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 1051 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 1052 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 1053 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 1054 1055 /* Safety - shouldn't be needed as there is no media to set. */ 1056 ifmedia_delete_instance(&sp->pp_im, IFM_INST_ANY); 1057 1058 sppp_lock_exit(sp); 1059 if (sp->pp_lock) 1060 mutex_obj_free(sp->pp_lock); 1061 1062 } 1063 1064 /* 1065 * Flush the interface output queue. 1066 */ 1067 void 1068 sppp_flush(struct ifnet *ifp) 1069 { 1070 struct sppp *sp = (struct sppp *) ifp; 1071 1072 IFQ_PURGE(&sp->pp_if.if_snd); 1073 IF_PURGE(&sp->pp_fastq); 1074 IF_PURGE(&sp->pp_cpq); 1075 } 1076 1077 /* 1078 * Check if the output queue is empty. 1079 */ 1080 int 1081 sppp_isempty(struct ifnet *ifp) 1082 { 1083 struct sppp *sp = (struct sppp *) ifp; 1084 int empty, s; 1085 1086 KASSERT(!sppp_locked(sp)); 1087 1088 s = splnet(); 1089 sppp_lock_enter(sp); 1090 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1091 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1092 sppp_lock_exit(sp); 1093 splx(s); 1094 return (empty); 1095 } 1096 1097 /* 1098 * Get next packet to send. 1099 */ 1100 struct mbuf * 1101 sppp_dequeue(struct ifnet *ifp) 1102 { 1103 struct sppp *sp = (struct sppp *) ifp; 1104 struct mbuf *m; 1105 int s; 1106 1107 s = splnet(); 1108 sppp_lock_enter(sp); 1109 /* 1110 * Process only the control protocol queue until we have at 1111 * least one NCP open. 1112 * 1113 * Do always serve all three queues in Cisco mode. 1114 */ 1115 IF_DEQUEUE(&sp->pp_cpq, m); 1116 if (m == NULL && 1117 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { 1118 IF_DEQUEUE(&sp->pp_fastq, m); 1119 if (m == NULL) 1120 IFQ_DEQUEUE(&sp->pp_if.if_snd, m); 1121 } 1122 sppp_lock_exit(sp); 1123 splx(s); 1124 return m; 1125 } 1126 1127 /* 1128 * Process an ioctl request. Called on low priority level. 1129 */ 1130 int 1131 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1132 { 1133 struct lwp *l = curlwp; /* XXX */ 1134 struct ifreq *ifr = (struct ifreq *) data; 1135 struct ifaddr *ifa = (struct ifaddr *) data; 1136 struct sppp *sp = (struct sppp *) ifp; 1137 int s, error=0, going_up, going_down, newmode; 1138 1139 s = splnet(); 1140 switch (cmd) { 1141 case SIOCINITIFADDR: 1142 ifa->ifa_rtrequest = p2p_rtrequest; 1143 break; 1144 1145 case SIOCSIFFLAGS: 1146 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1147 break; 1148 1149 sppp_lock_enter(sp); 1150 going_up = ifp->if_flags & IFF_UP && 1151 (ifp->if_flags & IFF_RUNNING) == 0; 1152 going_down = (ifp->if_flags & IFF_UP) == 0 && 1153 ifp->if_flags & IFF_RUNNING; 1154 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1155 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1156 /* sanity */ 1157 newmode = IFF_PASSIVE; 1158 ifp->if_flags &= ~IFF_AUTO; 1159 } 1160 1161 if (going_up || going_down) { 1162 lcp.Close(sp); 1163 } 1164 if (going_up && newmode == 0) { 1165 /* neither auto-dial nor passive */ 1166 ifp->if_flags |= IFF_RUNNING; 1167 if (!(sp->pp_flags & PP_CISCO)) 1168 lcp.Open(sp); 1169 } else if (going_down) { 1170 sppp_flush(ifp); 1171 ifp->if_flags &= ~IFF_RUNNING; 1172 } 1173 sppp_lock_exit(sp); 1174 break; 1175 1176 case SIOCSIFMTU: 1177 if (ifr->ifr_mtu < PPP_MINMRU || 1178 ifr->ifr_mtu > sp->lcp.their_mru) { 1179 error = EINVAL; 1180 break; 1181 } 1182 /*FALLTHROUGH*/ 1183 case SIOCGIFMTU: 1184 if ((error = ifioctl_common(ifp, cmd, data)) == ENETRESET) 1185 error = 0; 1186 break; 1187 case SIOCADDMULTI: 1188 case SIOCDELMULTI: 1189 break; 1190 1191 case SPPPSETAUTHCFG: 1192 case SPPPSETLCPCFG: 1193 case SPPPSETIDLETO: 1194 case SPPPSETAUTHFAILURE: 1195 case SPPPSETDNSOPTS: 1196 case SPPPSETKEEPALIVE: 1197 #if defined(COMPAT_50) || defined(MODULAR) 1198 case __SPPPSETIDLETO50: 1199 case __SPPPSETKEEPALIVE50: 1200 #endif /* COMPAT_50 || MODULAR */ 1201 error = kauth_authorize_network(l->l_cred, 1202 KAUTH_NETWORK_INTERFACE, 1203 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd, 1204 NULL); 1205 if (error) 1206 break; 1207 error = sppp_params(sp, cmd, data); 1208 break; 1209 1210 case SPPPGETAUTHCFG: 1211 case SPPPGETLCPCFG: 1212 case SPPPGETAUTHFAILURES: 1213 error = kauth_authorize_network(l->l_cred, 1214 KAUTH_NETWORK_INTERFACE, 1215 KAUTH_REQ_NETWORK_INTERFACE_GETPRIV, ifp, (void *)cmd, 1216 NULL); 1217 if (error) 1218 break; 1219 error = sppp_params(sp, cmd, data); 1220 break; 1221 1222 case SPPPGETSTATUS: 1223 case SPPPGETSTATUSNCP: 1224 case SPPPGETIDLETO: 1225 case SPPPGETDNSOPTS: 1226 case SPPPGETDNSADDRS: 1227 case SPPPGETKEEPALIVE: 1228 #if defined(COMPAT_50) || defined(MODULAR) 1229 case __SPPPGETIDLETO50: 1230 case __SPPPGETKEEPALIVE50: 1231 #endif /* COMPAT_50 || MODULAR */ 1232 error = sppp_params(sp, cmd, data); 1233 break; 1234 1235 case SIOCGIFMEDIA: 1236 error = ifmedia_ioctl(ifp, ifr, &sp->pp_im, cmd); 1237 break; 1238 1239 default: 1240 error = ifioctl_common(ifp, cmd, data); 1241 break; 1242 } 1243 splx(s); 1244 return (error); 1245 } 1246 1247 1248 /* 1249 * Cisco framing implementation. 1250 */ 1251 1252 /* 1253 * Handle incoming Cisco keepalive protocol packets. 1254 */ 1255 static void 1256 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1257 { 1258 STDDCL; 1259 struct cisco_packet *h; 1260 #ifdef INET 1261 uint32_t me, mymask = 0; /* XXX: GCC */ 1262 #endif 1263 1264 KASSERT(!sppp_locked(sp)); 1265 1266 sppp_lock_enter(sp); 1267 1268 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1269 if (debug) 1270 log(LOG_DEBUG, 1271 "%s: cisco invalid packet length: %d bytes\n", 1272 ifp->if_xname, m->m_pkthdr.len); 1273 sppp_lock_exit(sp); 1274 return; 1275 } 1276 h = mtod(m, struct cisco_packet *); 1277 if (debug) 1278 log(LOG_DEBUG, 1279 "%s: cisco input: %d bytes " 1280 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1281 ifp->if_xname, m->m_pkthdr.len, 1282 ntohl(h->type), h->par1, h->par2, (u_int)h->rel, 1283 (u_int)h->time0, (u_int)h->time1); 1284 switch (ntohl(h->type)) { 1285 default: 1286 if (debug) 1287 addlog("%s: cisco unknown packet type: 0x%x\n", 1288 ifp->if_xname, ntohl(h->type)); 1289 break; 1290 case CISCO_ADDR_REPLY: 1291 /* Reply on address request, ignore */ 1292 break; 1293 case CISCO_KEEPALIVE_REQ: 1294 sp->pp_alivecnt = 0; 1295 sp->pp_rseq[IDX_LCP] = ntohl(h->par1); 1296 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 1297 /* Local and remote sequence numbers are equal. 1298 * Probably, the line is in loopback mode. */ 1299 if (sp->pp_loopcnt >= LOOPALIVECNT) { 1300 printf ("%s: loopback\n", 1301 ifp->if_xname); 1302 sp->pp_loopcnt = 0; 1303 if (ifp->if_flags & IFF_UP) { 1304 sppp_lock_exit(sp); 1305 if_down(ifp); 1306 sppp_lock_enter(sp); 1307 IF_PURGE(&sp->pp_cpq); 1308 } 1309 } 1310 ++sp->pp_loopcnt; 1311 1312 /* Generate new local sequence number */ 1313 sp->pp_seq[IDX_LCP] = cprng_fast32(); 1314 break; 1315 } 1316 sp->pp_loopcnt = 0; 1317 if (! (ifp->if_flags & IFF_UP) && 1318 (ifp->if_flags & IFF_RUNNING)) { 1319 sppp_lock_exit(sp); 1320 if_up(ifp); 1321 sppp_lock_enter(sp); 1322 } 1323 break; 1324 case CISCO_ADDR_REQ: 1325 #ifdef INET 1326 sppp_lock_exit(sp); 1327 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1328 if (me != 0L) 1329 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1330 #endif 1331 sppp_lock_enter(sp); 1332 break; 1333 } 1334 sppp_lock_exit(sp); 1335 } 1336 1337 /* 1338 * Send Cisco keepalive packet. 1339 */ 1340 static void 1341 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1342 { 1343 STDDCL; 1344 struct ppp_header *h; 1345 struct cisco_packet *ch; 1346 struct mbuf *m; 1347 uint32_t t; 1348 1349 KASSERT(sppp_locked(sp)); 1350 1351 t = time_uptime * 1000; 1352 MGETHDR(m, M_DONTWAIT, MT_DATA); 1353 if (! m) 1354 return; 1355 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1356 m_reset_rcvif(m); 1357 1358 h = mtod(m, struct ppp_header *); 1359 h->address = CISCO_MULTICAST; 1360 h->control = 0; 1361 h->protocol = htons(CISCO_KEEPALIVE); 1362 1363 ch = (struct cisco_packet *)(h + 1); 1364 ch->type = htonl(type); 1365 ch->par1 = htonl(par1); 1366 ch->par2 = htonl(par2); 1367 ch->rel = -1; 1368 1369 ch->time0 = htons((u_short)(t >> 16)); 1370 ch->time1 = htons((u_short) t); 1371 1372 if (debug) 1373 log(LOG_DEBUG, 1374 "%s: cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1375 ifp->if_xname, ntohl(ch->type), ch->par1, 1376 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1377 (u_int)ch->time1); 1378 1379 if (IF_QFULL(&sp->pp_cpq)) { 1380 IF_DROP(&sp->pp_fastq); 1381 IF_DROP(&ifp->if_snd); 1382 m_freem(m); 1383 ++ifp->if_oerrors; 1384 return; 1385 } else 1386 IF_ENQUEUE(&sp->pp_cpq, m); 1387 if (! (ifp->if_flags & IFF_OACTIVE)) { 1388 sppp_lock_exit(sp); 1389 if_start_lock(ifp); 1390 sppp_lock_enter(sp); 1391 } 1392 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1393 } 1394 1395 /* 1396 * PPP protocol implementation. 1397 */ 1398 1399 /* 1400 * Send PPP control protocol packet. 1401 */ 1402 static void 1403 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1404 u_char ident, u_short len, void *data) 1405 { 1406 STDDCL; 1407 struct lcp_header *lh; 1408 struct mbuf *m; 1409 size_t pkthdrlen; 1410 1411 KASSERT(sppp_locked(sp)); 1412 1413 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1414 1415 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1416 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1417 MGETHDR(m, M_DONTWAIT, MT_DATA); 1418 if (! m) 1419 return; 1420 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1421 m_reset_rcvif(m); 1422 1423 if (sp->pp_flags & PP_NOFRAMING) { 1424 *mtod(m, uint16_t *) = htons(proto); 1425 lh = (struct lcp_header *)(mtod(m, uint8_t *) + 2); 1426 } else { 1427 struct ppp_header *h; 1428 h = mtod(m, struct ppp_header *); 1429 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1430 h->control = PPP_UI; /* Unnumbered Info */ 1431 h->protocol = htons(proto); /* Link Control Protocol */ 1432 lh = (struct lcp_header *)(h + 1); 1433 } 1434 lh->type = type; 1435 lh->ident = ident; 1436 lh->len = htons(LCP_HEADER_LEN + len); 1437 if (len) 1438 memcpy(lh + 1, data, len); 1439 1440 if (debug) { 1441 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 1442 ifp->if_xname, 1443 sppp_proto_name(proto), 1444 sppp_cp_type_name(lh->type), lh->ident, ntohs(lh->len)); 1445 if (len) 1446 sppp_print_bytes((u_char *)(lh + 1), len); 1447 addlog(">\n"); 1448 } 1449 if (IF_QFULL(&sp->pp_cpq)) { 1450 IF_DROP(&sp->pp_fastq); 1451 IF_DROP(&ifp->if_snd); 1452 m_freem(m); 1453 ++ifp->if_oerrors; 1454 return; 1455 } else 1456 IF_ENQUEUE(&sp->pp_cpq, m); 1457 1458 if (! (ifp->if_flags & IFF_OACTIVE)) { 1459 sppp_lock_exit(sp); 1460 if_start_lock(ifp); 1461 sppp_lock_enter(sp); 1462 } 1463 1464 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1465 } 1466 1467 /* 1468 * Handle incoming PPP control protocol packets. 1469 */ 1470 static void 1471 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1472 { 1473 STDDCL; 1474 struct lcp_header *h; 1475 int printlen, len = m->m_pkthdr.len; 1476 int rv; 1477 u_char *p; 1478 uint32_t u32; 1479 1480 KASSERT(!sppp_locked(sp)); 1481 if (len < 4) { 1482 if (debug) 1483 log(LOG_DEBUG, 1484 "%s: %s invalid packet length: %d bytes\n", 1485 ifp->if_xname, cp->name, len); 1486 return; 1487 } 1488 h = mtod(m, struct lcp_header *); 1489 if (debug) { 1490 printlen = ntohs(h->len); 1491 log(LOG_DEBUG, 1492 "%s: %s input(%s): <%s id=0x%x len=%d", 1493 ifp->if_xname, cp->name, 1494 sppp_state_name(sp->state[cp->protoidx]), 1495 sppp_cp_type_name(h->type), h->ident, printlen); 1496 if (len < printlen) 1497 printlen = len; 1498 if (printlen > 4) 1499 sppp_print_bytes((u_char *)(h + 1), printlen - 4); 1500 addlog(">\n"); 1501 } 1502 if (len > ntohs(h->len)) 1503 len = ntohs(h->len); 1504 p = (u_char *)(h + 1); 1505 switch (h->type) { 1506 case CONF_REQ: 1507 if (len < 4) { 1508 if (debug) 1509 addlog("%s: %s invalid conf-req length %d\n", 1510 ifp->if_xname, cp->name, 1511 len); 1512 sppp_lock_enter(sp); 1513 ++ifp->if_ierrors; 1514 sppp_lock_exit(sp); 1515 break; 1516 } 1517 /* handle states where RCR doesn't get a SCA/SCN */ 1518 sppp_lock_enter(sp); 1519 switch (sp->state[cp->protoidx]) { 1520 case STATE_CLOSING: 1521 case STATE_STOPPING: 1522 sppp_lock_exit(sp); 1523 return; 1524 case STATE_CLOSED: 1525 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1526 0, 0); 1527 sppp_lock_exit(sp); 1528 return; 1529 } 1530 rv = (cp->RCR)(sp, h, len); 1531 if (rv < 0) { 1532 /* fatal error, shut down */ 1533 (cp->tld)(sp); 1534 sppp_lcp_tlf(sp); 1535 sppp_lock_exit(sp); 1536 return; 1537 } 1538 switch (sp->state[cp->protoidx]) { 1539 case STATE_OPENED: 1540 (cp->tld)(sp); 1541 (cp->scr)(sp); 1542 /* fall through... */ 1543 case STATE_ACK_SENT: 1544 case STATE_REQ_SENT: 1545 sppp_cp_change_state(cp, sp, rv? 1546 STATE_ACK_SENT: STATE_REQ_SENT); 1547 break; 1548 case STATE_STOPPED: 1549 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1550 (cp->scr)(sp); 1551 sppp_cp_change_state(cp, sp, rv? 1552 STATE_ACK_SENT: STATE_REQ_SENT); 1553 break; 1554 case STATE_ACK_RCVD: 1555 if (rv) { 1556 sppp_cp_change_state(cp, sp, STATE_OPENED); 1557 if (debug) 1558 log(LOG_DEBUG, "%s: %s tlu\n", 1559 ifp->if_xname, 1560 cp->name); 1561 (cp->tlu)(sp); 1562 } else 1563 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1564 break; 1565 default: 1566 sppp_lock_enter(sp); 1567 printf("%s: %s illegal %s in state %s\n", 1568 ifp->if_xname, cp->name, 1569 sppp_cp_type_name(h->type), 1570 sppp_state_name(sp->state[cp->protoidx])); 1571 ++ifp->if_ierrors; 1572 } 1573 sppp_lock_exit(sp); 1574 break; 1575 case CONF_ACK: 1576 sppp_lock_enter(sp); 1577 if (h->ident != sp->confid[cp->protoidx]) { 1578 if (debug) 1579 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1580 ifp->if_xname, cp->name, 1581 h->ident, sp->confid[cp->protoidx]); 1582 ++ifp->if_ierrors; 1583 sppp_lock_exit(sp); 1584 break; 1585 } 1586 switch (sp->state[cp->protoidx]) { 1587 case STATE_CLOSED: 1588 case STATE_STOPPED: 1589 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1590 break; 1591 case STATE_CLOSING: 1592 case STATE_STOPPING: 1593 break; 1594 case STATE_REQ_SENT: 1595 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1596 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1597 break; 1598 case STATE_OPENED: 1599 (cp->tld)(sp); 1600 /* fall through */ 1601 case STATE_ACK_RCVD: 1602 (cp->scr)(sp); 1603 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1604 break; 1605 case STATE_ACK_SENT: 1606 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1607 sppp_cp_change_state(cp, sp, STATE_OPENED); 1608 if (debug) 1609 log(LOG_DEBUG, "%s: %s tlu\n", 1610 ifp->if_xname, cp->name); 1611 (cp->tlu)(sp); 1612 break; 1613 default: 1614 printf("%s: %s illegal %s in state %s\n", 1615 ifp->if_xname, cp->name, 1616 sppp_cp_type_name(h->type), 1617 sppp_state_name(sp->state[cp->protoidx])); 1618 ++ifp->if_ierrors; 1619 } 1620 sppp_lock_exit(sp); 1621 break; 1622 case CONF_NAK: 1623 case CONF_REJ: 1624 sppp_lock_enter(sp); 1625 if (h->ident != sp->confid[cp->protoidx]) { 1626 if (debug) 1627 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1628 ifp->if_xname, cp->name, 1629 h->ident, sp->confid[cp->protoidx]); 1630 ++ifp->if_ierrors; 1631 sppp_lock_exit(sp); 1632 break; 1633 } 1634 if (h->type == CONF_NAK) 1635 (cp->RCN_nak)(sp, h, len); 1636 else /* CONF_REJ */ 1637 (cp->RCN_rej)(sp, h, len); 1638 1639 switch (sp->state[cp->protoidx]) { 1640 case STATE_CLOSED: 1641 case STATE_STOPPED: 1642 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1643 break; 1644 case STATE_REQ_SENT: 1645 case STATE_ACK_SENT: 1646 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1647 (cp->scr)(sp); 1648 break; 1649 case STATE_OPENED: 1650 (cp->tld)(sp); 1651 /* fall through */ 1652 case STATE_ACK_RCVD: 1653 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1654 (cp->scr)(sp); 1655 break; 1656 case STATE_CLOSING: 1657 case STATE_STOPPING: 1658 break; 1659 default: 1660 printf("%s: %s illegal %s in state %s\n", 1661 ifp->if_xname, cp->name, 1662 sppp_cp_type_name(h->type), 1663 sppp_state_name(sp->state[cp->protoidx])); 1664 ++ifp->if_ierrors; 1665 } 1666 sppp_lock_exit(sp); 1667 break; 1668 1669 case TERM_REQ: 1670 sppp_lock_enter(sp); 1671 switch (sp->state[cp->protoidx]) { 1672 case STATE_ACK_RCVD: 1673 case STATE_ACK_SENT: 1674 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1675 /* fall through */ 1676 case STATE_CLOSED: 1677 case STATE_STOPPED: 1678 case STATE_CLOSING: 1679 case STATE_STOPPING: 1680 case STATE_REQ_SENT: 1681 sta: 1682 /* Send Terminate-Ack packet. */ 1683 if (debug) 1684 log(LOG_DEBUG, "%s: %s send terminate-ack\n", 1685 ifp->if_xname, cp->name); 1686 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1687 break; 1688 case STATE_OPENED: 1689 (cp->tld)(sp); 1690 sp->rst_counter[cp->protoidx] = 0; 1691 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1692 goto sta; 1693 default: 1694 printf("%s: %s illegal %s in state %s\n", 1695 ifp->if_xname, cp->name, 1696 sppp_cp_type_name(h->type), 1697 sppp_state_name(sp->state[cp->protoidx])); 1698 ++ifp->if_ierrors; 1699 } 1700 sppp_lock_exit(sp); 1701 break; 1702 case TERM_ACK: 1703 sppp_lock_enter(sp); 1704 switch (sp->state[cp->protoidx]) { 1705 case STATE_CLOSED: 1706 case STATE_STOPPED: 1707 case STATE_REQ_SENT: 1708 case STATE_ACK_SENT: 1709 break; 1710 case STATE_CLOSING: 1711 (cp->tlf)(sp); 1712 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1713 sppp_lcp_check_and_close(sp); 1714 break; 1715 case STATE_STOPPING: 1716 (cp->tlf)(sp); 1717 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1718 sppp_lcp_check_and_close(sp); 1719 break; 1720 case STATE_ACK_RCVD: 1721 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1722 break; 1723 case STATE_OPENED: 1724 (cp->tld)(sp); 1725 (cp->scr)(sp); 1726 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1727 break; 1728 default: 1729 printf("%s: %s illegal %s in state %s\n", 1730 ifp->if_xname, cp->name, 1731 sppp_cp_type_name(h->type), 1732 sppp_state_name(sp->state[cp->protoidx])); 1733 ++ifp->if_ierrors; 1734 } 1735 sppp_lock_exit(sp); 1736 break; 1737 case CODE_REJ: 1738 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1739 sppp_lock_enter(sp); 1740 log(LOG_INFO, 1741 "%s: %s: ignoring RXJ (%s) for code ?, " 1742 "danger will robinson\n", 1743 ifp->if_xname, cp->name, 1744 sppp_cp_type_name(h->type)); 1745 switch (sp->state[cp->protoidx]) { 1746 case STATE_CLOSED: 1747 case STATE_STOPPED: 1748 case STATE_REQ_SENT: 1749 case STATE_ACK_SENT: 1750 case STATE_CLOSING: 1751 case STATE_STOPPING: 1752 case STATE_OPENED: 1753 break; 1754 case STATE_ACK_RCVD: 1755 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1756 break; 1757 default: 1758 printf("%s: %s illegal %s in state %s\n", 1759 ifp->if_xname, cp->name, 1760 sppp_cp_type_name(h->type), 1761 sppp_state_name(sp->state[cp->protoidx])); 1762 ++ifp->if_ierrors; 1763 } 1764 sppp_lock_exit(sp); 1765 break; 1766 case PROTO_REJ: 1767 { 1768 int catastrophic; 1769 const struct cp *upper; 1770 int i; 1771 uint16_t proto; 1772 1773 catastrophic = 0; 1774 upper = NULL; 1775 proto = p[0] << 8 | p[1]; 1776 for (i = 0; i < IDX_COUNT; i++) { 1777 if (cps[i]->proto == proto) { 1778 upper = cps[i]; 1779 break; 1780 } 1781 } 1782 if (upper == NULL) 1783 catastrophic++; 1784 1785 sppp_lock_enter(sp); 1786 1787 if (debug) 1788 log(LOG_INFO, 1789 "%s: %s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1790 ifp->if_xname, cp->name, catastrophic ? '-' : '+', 1791 sppp_cp_type_name(h->type), proto, 1792 upper ? upper->name : "unknown", 1793 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1794 1795 /* 1796 * if we got RXJ+ against conf-req, the peer does not implement 1797 * this particular protocol type. terminate the protocol. 1798 */ 1799 if (upper && !catastrophic) { 1800 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1801 upper->Close(sp); 1802 sppp_lock_exit(sp); 1803 break; 1804 } 1805 } 1806 1807 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1808 switch (sp->state[cp->protoidx]) { 1809 case STATE_CLOSED: 1810 case STATE_STOPPED: 1811 case STATE_REQ_SENT: 1812 case STATE_ACK_SENT: 1813 case STATE_CLOSING: 1814 case STATE_STOPPING: 1815 case STATE_OPENED: 1816 break; 1817 case STATE_ACK_RCVD: 1818 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1819 break; 1820 default: 1821 printf("%s: %s illegal %s in state %s\n", 1822 ifp->if_xname, cp->name, 1823 sppp_cp_type_name(h->type), 1824 sppp_state_name(sp->state[cp->protoidx])); 1825 ++ifp->if_ierrors; 1826 } 1827 sppp_lock_exit(sp); 1828 break; 1829 } 1830 case DISC_REQ: 1831 if (cp->proto != PPP_LCP) 1832 goto illegal; 1833 /* Discard the packet. */ 1834 break; 1835 case ECHO_REQ: 1836 if (cp->proto != PPP_LCP) 1837 goto illegal; 1838 sppp_lock_enter(sp); 1839 if (sp->state[cp->protoidx] != STATE_OPENED) { 1840 if (debug) 1841 addlog("%s: lcp echo req but lcp closed\n", 1842 ifp->if_xname); 1843 ++ifp->if_ierrors; 1844 sppp_lock_exit(sp); 1845 break; 1846 } 1847 if (len < 8) { 1848 if (debug) 1849 addlog("%s: invalid lcp echo request " 1850 "packet length: %d bytes\n", 1851 ifp->if_xname, len); 1852 sppp_lock_exit(sp); 1853 break; 1854 } 1855 memcpy(&u32, h + 1, sizeof u32); 1856 if (ntohl(u32) == sp->lcp.magic) { 1857 /* Line loopback mode detected. */ 1858 printf("%s: loopback\n", ifp->if_xname); 1859 if_down(ifp); 1860 IF_PURGE(&sp->pp_cpq); 1861 1862 /* Shut down the PPP link. */ 1863 /* XXX */ 1864 lcp.Down(sp); 1865 lcp.Up(sp); 1866 sppp_lock_exit(sp); 1867 break; 1868 } 1869 u32 = htonl(sp->lcp.magic); 1870 memcpy(h + 1, &u32, sizeof u32); 1871 if (debug) 1872 addlog("%s: got lcp echo req, sending echo rep\n", 1873 ifp->if_xname); 1874 sppp_cp_send(sp, PPP_LCP, ECHO_REPLY, h->ident, len - 4, 1875 h + 1); 1876 sppp_lock_exit(sp); 1877 break; 1878 case ECHO_REPLY: 1879 if (cp->proto != PPP_LCP) 1880 goto illegal; 1881 sppp_lock_enter(sp); 1882 if (h->ident != sp->lcp.echoid) { 1883 ++ifp->if_ierrors; 1884 sppp_lock_exit(sp); 1885 break; 1886 } 1887 if (len < 8) { 1888 if (debug) 1889 addlog("%s: lcp invalid echo reply " 1890 "packet length: %d bytes\n", 1891 ifp->if_xname, len); 1892 sppp_lock_exit(sp); 1893 break; 1894 } 1895 if (debug) 1896 addlog("%s: lcp got echo rep\n", 1897 ifp->if_xname); 1898 memcpy(&u32, h + 1, sizeof u32); 1899 if (ntohl(u32) != sp->lcp.magic) 1900 sp->pp_alivecnt = 0; 1901 sppp_lock_exit(sp); 1902 break; 1903 default: 1904 /* Unknown packet type -- send Code-Reject packet. */ 1905 illegal: 1906 sppp_lock_enter(sp); 1907 if (debug) 1908 addlog("%s: %s send code-rej for 0x%x\n", 1909 ifp->if_xname, cp->name, h->type); 1910 sppp_cp_send(sp, cp->proto, CODE_REJ, 1911 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 1912 ++ifp->if_ierrors; 1913 sppp_lock_exit(sp); 1914 } 1915 } 1916 1917 1918 /* 1919 * The generic part of all Up/Down/Open/Close/TO event handlers. 1920 * Basically, the state transition handling in the automaton. 1921 */ 1922 static void 1923 sppp_up_event(const struct cp *cp, struct sppp *sp) 1924 { 1925 STDDCL; 1926 1927 KASSERT(sppp_locked(sp)); 1928 1929 if (debug) 1930 log(LOG_DEBUG, "%s: %s up(%s)\n", 1931 ifp->if_xname, cp->name, 1932 sppp_state_name(sp->state[cp->protoidx])); 1933 1934 switch (sp->state[cp->protoidx]) { 1935 case STATE_INITIAL: 1936 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1937 break; 1938 case STATE_STARTING: 1939 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1940 (cp->scr)(sp); 1941 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1942 break; 1943 default: 1944 printf("%s: %s illegal up in state %s\n", 1945 ifp->if_xname, cp->name, 1946 sppp_state_name(sp->state[cp->protoidx])); 1947 } 1948 } 1949 1950 static void 1951 sppp_down_event(const struct cp *cp, struct sppp *sp) 1952 { 1953 STDDCL; 1954 1955 KASSERT(sppp_locked(sp)); 1956 1957 if (debug) 1958 log(LOG_DEBUG, "%s: %s down(%s)\n", 1959 ifp->if_xname, cp->name, 1960 sppp_state_name(sp->state[cp->protoidx])); 1961 1962 switch (sp->state[cp->protoidx]) { 1963 case STATE_CLOSED: 1964 case STATE_CLOSING: 1965 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1966 break; 1967 case STATE_STOPPED: 1968 (cp->tls)(sp); 1969 /* fall through */ 1970 case STATE_STOPPING: 1971 case STATE_REQ_SENT: 1972 case STATE_ACK_RCVD: 1973 case STATE_ACK_SENT: 1974 sppp_cp_change_state(cp, sp, STATE_STARTING); 1975 break; 1976 case STATE_OPENED: 1977 (cp->tld)(sp); 1978 sppp_cp_change_state(cp, sp, STATE_STARTING); 1979 break; 1980 default: 1981 printf("%s: %s illegal down in state %s\n", 1982 ifp->if_xname, cp->name, 1983 sppp_state_name(sp->state[cp->protoidx])); 1984 } 1985 } 1986 1987 1988 static void 1989 sppp_open_event(const struct cp *cp, struct sppp *sp) 1990 { 1991 STDDCL; 1992 1993 KASSERT(sppp_locked(sp)); 1994 1995 if (debug) 1996 log(LOG_DEBUG, "%s: %s open(%s)\n", 1997 ifp->if_xname, cp->name, 1998 sppp_state_name(sp->state[cp->protoidx])); 1999 2000 switch (sp->state[cp->protoidx]) { 2001 case STATE_INITIAL: 2002 sppp_cp_change_state(cp, sp, STATE_STARTING); 2003 (cp->tls)(sp); 2004 break; 2005 case STATE_STARTING: 2006 break; 2007 case STATE_CLOSED: 2008 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 2009 (cp->scr)(sp); 2010 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2011 break; 2012 case STATE_STOPPED: 2013 case STATE_STOPPING: 2014 case STATE_REQ_SENT: 2015 case STATE_ACK_RCVD: 2016 case STATE_ACK_SENT: 2017 case STATE_OPENED: 2018 break; 2019 case STATE_CLOSING: 2020 sppp_cp_change_state(cp, sp, STATE_STOPPING); 2021 break; 2022 } 2023 } 2024 2025 2026 static void 2027 sppp_close_event(const struct cp *cp, struct sppp *sp) 2028 { 2029 STDDCL; 2030 2031 KASSERT(sppp_locked(sp)); 2032 2033 if (debug) 2034 log(LOG_DEBUG, "%s: %s close(%s)\n", 2035 ifp->if_xname, cp->name, 2036 sppp_state_name(sp->state[cp->protoidx])); 2037 2038 switch (sp->state[cp->protoidx]) { 2039 case STATE_INITIAL: 2040 case STATE_CLOSED: 2041 case STATE_CLOSING: 2042 break; 2043 case STATE_STARTING: 2044 sppp_cp_change_state(cp, sp, STATE_INITIAL); 2045 (cp->tlf)(sp); 2046 break; 2047 case STATE_STOPPED: 2048 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2049 break; 2050 case STATE_STOPPING: 2051 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2052 break; 2053 case STATE_OPENED: 2054 (cp->tld)(sp); 2055 /* fall through */ 2056 case STATE_REQ_SENT: 2057 case STATE_ACK_RCVD: 2058 case STATE_ACK_SENT: 2059 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 2060 sppp_cp_send(sp, cp->proto, TERM_REQ, 2061 ++sp->pp_seq[cp->protoidx], 0, 0); 2062 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2063 break; 2064 } 2065 } 2066 2067 static void 2068 sppp_to_event(const struct cp *cp, struct sppp *sp) 2069 { 2070 STDDCL; 2071 int s; 2072 2073 KASSERT(sppp_locked(sp)); 2074 2075 s = splnet(); 2076 2077 if (debug) 2078 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 2079 ifp->if_xname, cp->name, 2080 sppp_state_name(sp->state[cp->protoidx]), 2081 sp->rst_counter[cp->protoidx]); 2082 2083 if (--sp->rst_counter[cp->protoidx] < 0) 2084 /* TO- event */ 2085 switch (sp->state[cp->protoidx]) { 2086 case STATE_CLOSING: 2087 (cp->tlf)(sp); 2088 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2089 sppp_lcp_check_and_close(sp); 2090 break; 2091 case STATE_STOPPING: 2092 (cp->tlf)(sp); 2093 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2094 sppp_lcp_check_and_close(sp); 2095 break; 2096 case STATE_REQ_SENT: 2097 case STATE_ACK_RCVD: 2098 case STATE_ACK_SENT: 2099 (cp->tlf)(sp); 2100 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2101 sppp_lcp_check_and_close(sp); 2102 break; 2103 } 2104 else 2105 /* TO+ event */ 2106 switch (sp->state[cp->protoidx]) { 2107 case STATE_CLOSING: 2108 case STATE_STOPPING: 2109 sppp_cp_send(sp, cp->proto, TERM_REQ, 2110 ++sp->pp_seq[cp->protoidx], 0, 0); 2111 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 2112 cp->TO, sp); 2113 break; 2114 case STATE_REQ_SENT: 2115 case STATE_ACK_RCVD: 2116 (cp->scr)(sp); 2117 /* sppp_cp_change_state() will restart the timer */ 2118 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2119 break; 2120 case STATE_ACK_SENT: 2121 (cp->scr)(sp); 2122 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 2123 cp->TO, sp); 2124 break; 2125 } 2126 2127 splx(s); 2128 } 2129 2130 /* 2131 * Change the state of a control protocol in the state automaton. 2132 * Takes care of starting/stopping the restart timer. 2133 */ 2134 void 2135 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 2136 { 2137 KASSERT(sppp_locked(sp)); 2138 2139 sp->state[cp->protoidx] = newstate; 2140 callout_stop(&sp->ch[cp->protoidx]); 2141 switch (newstate) { 2142 case STATE_INITIAL: 2143 case STATE_STARTING: 2144 case STATE_CLOSED: 2145 case STATE_STOPPED: 2146 case STATE_OPENED: 2147 break; 2148 case STATE_CLOSING: 2149 case STATE_STOPPING: 2150 case STATE_REQ_SENT: 2151 case STATE_ACK_RCVD: 2152 case STATE_ACK_SENT: 2153 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 2154 cp->TO, sp); 2155 break; 2156 } 2157 } 2158 2159 /* 2160 *--------------------------------------------------------------------------* 2161 * * 2162 * The LCP implementation. * 2163 * * 2164 *--------------------------------------------------------------------------* 2165 */ 2166 static void 2167 sppp_lcp_init(struct sppp *sp) 2168 { 2169 sppp_lock_enter(sp); 2170 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 2171 sp->lcp.magic = 0; 2172 sp->state[IDX_LCP] = STATE_INITIAL; 2173 sp->fail_counter[IDX_LCP] = 0; 2174 sp->pp_seq[IDX_LCP] = 0; 2175 sp->pp_rseq[IDX_LCP] = 0; 2176 sp->lcp.protos = 0; 2177 2178 /* 2179 * Initialize counters and timeout values. Note that we don't 2180 * use the 3 seconds suggested in RFC 1661 since we are likely 2181 * running on a fast link. XXX We should probably implement 2182 * the exponential backoff option. Note that these values are 2183 * relevant for all control protocols, not just LCP only. 2184 */ 2185 sp->lcp.timeout = 1 * hz; 2186 sp->lcp.max_terminate = 2; 2187 sp->lcp.max_configure = 10; 2188 sp->lcp.max_failure = 10; 2189 callout_init(&sp->ch[IDX_LCP], 0); 2190 sppp_lock_exit(sp); 2191 } 2192 2193 static void 2194 sppp_lcp_up(struct sppp *sp) 2195 { 2196 STDDCL; 2197 2198 KASSERT(sppp_locked(sp)); 2199 2200 /* Initialize activity timestamp: opening a connection is an activity */ 2201 sp->pp_last_receive = sp->pp_last_activity = time_uptime; 2202 2203 /* 2204 * If this interface is passive or dial-on-demand, and we are 2205 * still in Initial state, it means we've got an incoming 2206 * call. Activate the interface. 2207 */ 2208 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2209 if (debug) 2210 log(LOG_DEBUG, 2211 "%s: Up event", ifp->if_xname); 2212 ifp->if_flags |= IFF_RUNNING; 2213 if (sp->state[IDX_LCP] == STATE_INITIAL) { 2214 if (debug) 2215 addlog("(incoming call)\n"); 2216 sp->pp_flags |= PP_CALLIN; 2217 lcp.Open(sp); 2218 } else if (debug) 2219 addlog("\n"); 2220 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 && 2221 (sp->state[IDX_LCP] == STATE_INITIAL)) { 2222 ifp->if_flags |= IFF_RUNNING; 2223 lcp.Open(sp); 2224 } 2225 2226 sppp_up_event(&lcp, sp); 2227 } 2228 2229 static void 2230 sppp_lcp_down(struct sppp *sp) 2231 { 2232 STDDCL; 2233 2234 KASSERT(sppp_locked(sp)); 2235 2236 sppp_down_event(&lcp, sp); 2237 2238 /* 2239 * If this is neither a dial-on-demand nor a passive 2240 * interface, simulate an ``ifconfig down'' action, so the 2241 * administrator can force a redial by another ``ifconfig 2242 * up''. XXX For leased line operation, should we immediately 2243 * try to reopen the connection here? 2244 */ 2245 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2246 if (debug) 2247 log(LOG_INFO, 2248 "%s: Down event (carrier loss), taking interface down.\n", 2249 ifp->if_xname); 2250 sppp_lock_exit(sp); 2251 if_down(ifp); 2252 sppp_lock_enter(sp); 2253 } else { 2254 if (debug) 2255 log(LOG_DEBUG, 2256 "%s: Down event (carrier loss)\n", 2257 ifp->if_xname); 2258 } 2259 sp->pp_flags &= ~PP_CALLIN; 2260 if (sp->state[IDX_LCP] != STATE_INITIAL) 2261 lcp.Close(sp); 2262 ifp->if_flags &= ~IFF_RUNNING; 2263 } 2264 2265 static void 2266 sppp_lcp_open(struct sppp *sp) 2267 { 2268 KASSERT(sppp_locked(sp)); 2269 2270 if (sp->pp_if.if_mtu < PP_MTU) { 2271 sp->lcp.mru = sp->pp_if.if_mtu; 2272 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2273 } else 2274 sp->lcp.mru = PP_MTU; 2275 sp->lcp.their_mru = PP_MTU; 2276 2277 /* 2278 * If we are authenticator, negotiate LCP_AUTH 2279 */ 2280 if (sp->hisauth.proto != 0) 2281 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2282 else 2283 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2284 sp->pp_flags &= ~PP_NEEDAUTH; 2285 sppp_open_event(&lcp, sp); 2286 } 2287 2288 static void 2289 sppp_lcp_close(struct sppp *sp) 2290 { 2291 KASSERT(sppp_locked(sp)); 2292 sppp_close_event(&lcp, sp); 2293 } 2294 2295 static void 2296 sppp_lcp_TO(void *cookie) 2297 { 2298 struct sppp *sp = (struct sppp*)cookie; 2299 KASSERT(!sppp_locked(sp)); 2300 2301 sppp_lock_enter(sp); 2302 sppp_to_event(&lcp, sp); 2303 sppp_lock_exit(sp); 2304 } 2305 2306 /* 2307 * Analyze a configure request. Return true if it was agreeable, and 2308 * caused action sca, false if it has been rejected or nak'ed, and 2309 * caused action scn. (The return value is used to make the state 2310 * transition decision in the state automaton.) 2311 */ 2312 static int 2313 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2314 { 2315 STDDCL; 2316 u_char *buf, *r, *p, l, blen; 2317 int origlen, rlen; 2318 uint32_t nmagic; 2319 u_short authproto; 2320 2321 KASSERT(sppp_locked(sp)); 2322 2323 len -= 4; 2324 origlen = len; 2325 buf = r = malloc (blen = len, M_TEMP, M_NOWAIT); 2326 if (! buf) 2327 return (0); 2328 2329 if (debug) 2330 log(LOG_DEBUG, "%s: lcp parse opts:", 2331 ifp->if_xname); 2332 2333 /* pass 1: check for things that need to be rejected */ 2334 p = (void *)(h + 1); 2335 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2336 /* Sanity check option length */ 2337 if (l > len) { 2338 /* 2339 * Malicious option - drop immediately. 2340 * XXX Maybe we should just RXJ it? 2341 */ 2342 addlog("%s: received malicious LCP option 0x%02x, " 2343 "length 0x%02x, (len: 0x%02x) dropping.\n", ifp->if_xname, 2344 p[0], l, len); 2345 goto drop; 2346 } 2347 if (debug) 2348 addlog(" %s", sppp_lcp_opt_name(*p)); 2349 switch (*p) { 2350 case LCP_OPT_MAGIC: 2351 /* Magic number. */ 2352 /* fall through, both are same length */ 2353 case LCP_OPT_ASYNC_MAP: 2354 /* Async control character map. */ 2355 if (len >= 6 || l == 6) 2356 continue; 2357 if (debug) 2358 addlog(" [invalid]"); 2359 break; 2360 case LCP_OPT_MRU: 2361 /* Maximum receive unit. */ 2362 if (len >= 4 && l == 4) 2363 continue; 2364 if (debug) 2365 addlog(" [invalid]"); 2366 break; 2367 case LCP_OPT_AUTH_PROTO: 2368 if (len < 4) { 2369 if (debug) 2370 addlog(" [invalid]"); 2371 break; 2372 } 2373 authproto = (p[2] << 8) + p[3]; 2374 if (authproto == PPP_CHAP && l != 5) { 2375 if (debug) 2376 addlog(" [invalid chap len]"); 2377 break; 2378 } 2379 if (sp->myauth.proto == 0) { 2380 /* we are not configured to do auth */ 2381 if (debug) 2382 addlog(" [not configured]"); 2383 break; 2384 } 2385 /* 2386 * Remote want us to authenticate, remember this, 2387 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2388 * up. 2389 */ 2390 sp->pp_flags |= PP_NEEDAUTH; 2391 continue; 2392 default: 2393 /* Others not supported. */ 2394 if (debug) 2395 addlog(" [rej]"); 2396 break; 2397 } 2398 if (rlen + l > blen) { 2399 if (debug) 2400 addlog(" [overflow]"); 2401 continue; 2402 } 2403 /* Add the option to rejected list. */ 2404 memcpy(r, p, l); 2405 r += l; 2406 rlen += l; 2407 } 2408 if (rlen) { 2409 if (debug) 2410 addlog(" send conf-rej\n"); 2411 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2412 goto end; 2413 } else if (debug) 2414 addlog("\n"); 2415 2416 /* 2417 * pass 2: check for option values that are unacceptable and 2418 * thus require to be nak'ed. 2419 */ 2420 if (debug) 2421 log(LOG_DEBUG, "%s: lcp parse opt values: ", 2422 ifp->if_xname); 2423 2424 p = (void *)(h + 1); 2425 len = origlen; 2426 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2427 if (debug) 2428 addlog(" %s", sppp_lcp_opt_name(*p)); 2429 switch (*p) { 2430 case LCP_OPT_MAGIC: 2431 /* Magic number -- extract. */ 2432 nmagic = (uint32_t)p[2] << 24 | 2433 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2434 if (nmagic != sp->lcp.magic) { 2435 if (debug) 2436 addlog(" 0x%x", nmagic); 2437 continue; 2438 } 2439 /* 2440 * Local and remote magics equal -- loopback? 2441 */ 2442 if (sp->pp_loopcnt >= LOOPALIVECNT*5) { 2443 printf ("%s: loopback\n", 2444 ifp->if_xname); 2445 sp->pp_loopcnt = 0; 2446 if (ifp->if_flags & IFF_UP) { 2447 sppp_lock_exit(sp); 2448 if_down(ifp); 2449 sppp_lock_enter(sp); 2450 IF_PURGE(&sp->pp_cpq); 2451 /* XXX ? */ 2452 lcp.Down(sp); 2453 lcp.Up(sp); 2454 } 2455 } else if (debug) 2456 addlog(" [glitch]"); 2457 ++sp->pp_loopcnt; 2458 /* 2459 * We negate our magic here, and NAK it. If 2460 * we see it later in an NAK packet, we 2461 * suggest a new one. 2462 */ 2463 nmagic = ~sp->lcp.magic; 2464 /* Gonna NAK it. */ 2465 p[2] = nmagic >> 24; 2466 p[3] = nmagic >> 16; 2467 p[4] = nmagic >> 8; 2468 p[5] = nmagic; 2469 break; 2470 2471 case LCP_OPT_ASYNC_MAP: 2472 /* 2473 * Async control character map -- just ignore it. 2474 * 2475 * Quote from RFC 1662, chapter 6: 2476 * To enable this functionality, synchronous PPP 2477 * implementations MUST always respond to the 2478 * Async-Control-Character-Map Configuration 2479 * Option with the LCP Configure-Ack. However, 2480 * acceptance of the Configuration Option does 2481 * not imply that the synchronous implementation 2482 * will do any ACCM mapping. Instead, all such 2483 * octet mapping will be performed by the 2484 * asynchronous-to-synchronous converter. 2485 */ 2486 continue; 2487 2488 case LCP_OPT_MRU: 2489 /* 2490 * Maximum receive unit. Always agreeable, 2491 * but ignored by now. 2492 */ 2493 sp->lcp.their_mru = p[2] * 256 + p[3]; 2494 if (debug) 2495 addlog(" %ld", sp->lcp.their_mru); 2496 continue; 2497 2498 case LCP_OPT_AUTH_PROTO: 2499 authproto = (p[2] << 8) + p[3]; 2500 if (sp->myauth.proto != authproto) { 2501 /* not agreed, nak */ 2502 if (debug) 2503 addlog(" [mine %s != his %s]", 2504 sppp_proto_name(sp->myauth.proto), 2505 sppp_proto_name(authproto)); 2506 p[2] = sp->myauth.proto >> 8; 2507 p[3] = sp->myauth.proto; 2508 break; 2509 } 2510 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2511 if (debug) 2512 addlog(" [chap not MD5]"); 2513 p[4] = CHAP_MD5; 2514 break; 2515 } 2516 continue; 2517 } 2518 if (rlen + l > blen) { 2519 if (debug) 2520 addlog(" [overflow]"); 2521 continue; 2522 } 2523 /* Add the option to nak'ed list. */ 2524 memcpy(r, p, l); 2525 r += l; 2526 rlen += l; 2527 } 2528 if (rlen) { 2529 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2530 if (debug) 2531 addlog(" max_failure (%d) exceeded, " 2532 "send conf-rej\n", 2533 sp->lcp.max_failure); 2534 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2535 } else { 2536 if (debug) 2537 addlog(" send conf-nak\n"); 2538 sppp_cp_send(sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2539 } 2540 goto end; 2541 } else { 2542 if (debug) 2543 addlog(" send conf-ack\n"); 2544 sp->fail_counter[IDX_LCP] = 0; 2545 sp->pp_loopcnt = 0; 2546 sppp_cp_send(sp, PPP_LCP, CONF_ACK, h->ident, origlen, h + 1); 2547 } 2548 2549 end: 2550 free(buf, M_TEMP); 2551 return (rlen == 0); 2552 2553 drop: 2554 free(buf, M_TEMP); 2555 return -1; 2556 } 2557 2558 /* 2559 * Analyze the LCP Configure-Reject option list, and adjust our 2560 * negotiation. 2561 */ 2562 static void 2563 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2564 { 2565 STDDCL; 2566 u_char *buf, *p, l; 2567 2568 KASSERT(sppp_locked(sp)); 2569 2570 len -= 4; 2571 buf = malloc (len, M_TEMP, M_NOWAIT); 2572 if (!buf) 2573 return; 2574 2575 if (debug) 2576 log(LOG_DEBUG, "%s: lcp rej opts:", 2577 ifp->if_xname); 2578 2579 p = (void *)(h + 1); 2580 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2581 /* Sanity check option length */ 2582 if (l > len) { 2583 /* 2584 * Malicious option - drop immediately. 2585 * XXX Maybe we should just RXJ it? 2586 */ 2587 addlog("%s: received malicious LCP option, " 2588 "dropping.\n", ifp->if_xname); 2589 goto drop; 2590 } 2591 if (debug) 2592 addlog(" %s", sppp_lcp_opt_name(*p)); 2593 switch (*p) { 2594 case LCP_OPT_MAGIC: 2595 /* Magic number -- can't use it, use 0 */ 2596 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2597 sp->lcp.magic = 0; 2598 break; 2599 case LCP_OPT_MRU: 2600 /* 2601 * We try to negotiate a lower MRU if the underlying 2602 * link's MTU is less than PP_MTU (e.g. PPPoE). If the 2603 * peer rejects this lower rate, fallback to the 2604 * default. 2605 */ 2606 if (debug) { 2607 addlog("%s: warning: peer rejected our MRU of " 2608 "%ld bytes. Defaulting to %d bytes\n", 2609 ifp->if_xname, sp->lcp.mru, PP_MTU); 2610 } 2611 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2612 sp->lcp.mru = PP_MTU; 2613 break; 2614 case LCP_OPT_AUTH_PROTO: 2615 /* 2616 * Peer doesn't want to authenticate himself, 2617 * deny unless this is a dialout call, and 2618 * SPPP_AUTHFLAG_NOCALLOUT is set. 2619 */ 2620 if ((sp->pp_flags & PP_CALLIN) == 0 && 2621 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2622 if (debug) 2623 addlog(" [don't insist on auth " 2624 "for callout]"); 2625 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2626 break; 2627 } 2628 if (debug) 2629 addlog("[access denied]\n"); 2630 lcp.Close(sp); 2631 break; 2632 } 2633 } 2634 if (debug) 2635 addlog("\n"); 2636 drop: 2637 free(buf, M_TEMP); 2638 return; 2639 } 2640 2641 /* 2642 * Analyze the LCP Configure-NAK option list, and adjust our 2643 * negotiation. 2644 */ 2645 static void 2646 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2647 { 2648 STDDCL; 2649 u_char *buf, *p, l, blen; 2650 uint32_t magic; 2651 2652 KASSERT(sppp_locked(sp)); 2653 2654 len -= 4; 2655 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 2656 if (!buf) 2657 return; 2658 2659 if (debug) 2660 log(LOG_DEBUG, "%s: lcp nak opts:", 2661 ifp->if_xname); 2662 2663 p = (void *)(h + 1); 2664 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2665 /* Sanity check option length */ 2666 if (l > len) { 2667 /* 2668 * Malicious option - drop immediately. 2669 * XXX Maybe we should just RXJ it? 2670 */ 2671 addlog("%s: received malicious LCP option, " 2672 "dropping.\n", ifp->if_xname); 2673 goto drop; 2674 } 2675 if (debug) 2676 addlog(" %s", sppp_lcp_opt_name(*p)); 2677 switch (*p) { 2678 case LCP_OPT_MAGIC: 2679 /* Magic number -- renegotiate */ 2680 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2681 len >= 6 && l == 6) { 2682 magic = (uint32_t)p[2] << 24 | 2683 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2684 /* 2685 * If the remote magic is our negated one, 2686 * this looks like a loopback problem. 2687 * Suggest a new magic to make sure. 2688 */ 2689 if (magic == ~sp->lcp.magic) { 2690 if (debug) 2691 addlog(" magic glitch"); 2692 sp->lcp.magic = cprng_fast32(); 2693 } else { 2694 sp->lcp.magic = magic; 2695 if (debug) 2696 addlog(" %d", magic); 2697 } 2698 } 2699 break; 2700 case LCP_OPT_MRU: 2701 /* 2702 * Peer wants to advise us to negotiate an MRU. 2703 * Agree on it if it's reasonable, or use 2704 * default otherwise. 2705 */ 2706 if (len >= 4 && l == 4) { 2707 u_int mru = p[2] * 256 + p[3]; 2708 if (debug) 2709 addlog(" %d", mru); 2710 if (mru < PPP_MINMRU || mru > sp->pp_if.if_mtu) 2711 mru = sp->pp_if.if_mtu; 2712 sp->lcp.mru = mru; 2713 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2714 } 2715 break; 2716 case LCP_OPT_AUTH_PROTO: 2717 /* 2718 * Peer doesn't like our authentication method, 2719 * deny. 2720 */ 2721 if (debug) 2722 addlog("[access denied]\n"); 2723 lcp.Close(sp); 2724 break; 2725 } 2726 } 2727 if (debug) 2728 addlog("\n"); 2729 drop: 2730 free(buf, M_TEMP); 2731 return; 2732 } 2733 2734 static void 2735 sppp_lcp_tlu(struct sppp *sp) 2736 { 2737 STDDCL; 2738 int i; 2739 uint32_t mask; 2740 2741 KASSERT(sppp_locked(sp)); 2742 2743 /* XXX ? */ 2744 if (! (ifp->if_flags & IFF_UP) && 2745 (ifp->if_flags & IFF_RUNNING)) { 2746 /* Coming out of loopback mode. */ 2747 sppp_lock_exit(sp); 2748 if_up(ifp); 2749 sppp_lock_enter(sp); 2750 } 2751 2752 for (i = 0; i < IDX_COUNT; i++) 2753 if ((cps[i])->flags & CP_QUAL) 2754 (cps[i])->Open(sp); 2755 2756 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2757 (sp->pp_flags & PP_NEEDAUTH) != 0) 2758 sp->pp_phase = SPPP_PHASE_AUTHENTICATE; 2759 else 2760 sp->pp_phase = SPPP_PHASE_NETWORK; 2761 2762 if (debug) 2763 { 2764 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 2765 sppp_phase_name(sp->pp_phase)); 2766 } 2767 2768 /* 2769 * Open all authentication protocols. This is even required 2770 * if we already proceeded to network phase, since it might be 2771 * that remote wants us to authenticate, so we might have to 2772 * send a PAP request. Undesired authentication protocols 2773 * don't do anything when they get an Open event. 2774 */ 2775 for (i = 0; i < IDX_COUNT; i++) 2776 if ((cps[i])->flags & CP_AUTH) 2777 (cps[i])->Open(sp); 2778 2779 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2780 /* Notify all NCPs. */ 2781 for (i = 0; i < IDX_COUNT; i++) 2782 if ((cps[i])->flags & CP_NCP) 2783 (cps[i])->Open(sp); 2784 } 2785 2786 /* Send Up events to all started protos. */ 2787 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) { 2788 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2789 (cps[i])->Up(sp); 2790 } 2791 } 2792 2793 /* notify low-level driver of state change */ 2794 if (sp->pp_chg) 2795 sp->pp_chg(sp, (int)sp->pp_phase); 2796 2797 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2798 /* if no NCP is starting, close down */ 2799 sppp_lcp_check_and_close(sp); 2800 } 2801 2802 static void 2803 sppp_lcp_tld(struct sppp *sp) 2804 { 2805 STDDCL; 2806 int i; 2807 uint32_t mask; 2808 2809 KASSERT(sppp_locked(sp)); 2810 2811 sppp_change_phase(sp, SPPP_PHASE_TERMINATE); 2812 2813 /* 2814 * Take upper layers down. We send the Down event first and 2815 * the Close second to prevent the upper layers from sending 2816 * ``a flurry of terminate-request packets'', as the RFC 2817 * describes it. 2818 */ 2819 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) { 2820 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2821 (cps[i])->Down(sp); 2822 (cps[i])->Close(sp); 2823 } 2824 } 2825 } 2826 2827 static void 2828 sppp_lcp_tls(struct sppp *sp) 2829 { 2830 STDDCL; 2831 2832 KASSERT(sppp_locked(sp)); 2833 2834 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2835 printf("%s: authentication failed %d times, not retrying again\n", 2836 sp->pp_if.if_xname, sp->pp_auth_failures); 2837 sppp_lock_exit(sp); 2838 if_down(&sp->pp_if); 2839 sppp_lock_enter(sp); 2840 return; 2841 } 2842 2843 sp->pp_phase = SPPP_PHASE_ESTABLISH; 2844 2845 if (debug) 2846 { 2847 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 2848 sppp_phase_name(sp->pp_phase)); 2849 } 2850 2851 /* Notify lower layer if desired. */ 2852 if (sp->pp_tls) 2853 (sp->pp_tls)(sp); 2854 } 2855 2856 static void 2857 sppp_lcp_tlf(struct sppp *sp) 2858 { 2859 KASSERT(sppp_locked(sp)); 2860 2861 sp->pp_phase = SPPP_PHASE_DEAD; 2862 2863 if (debug) 2864 { 2865 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 2866 sppp_phase_name(sp->pp_phase)); 2867 } 2868 2869 /* Notify lower layer if desired. */ 2870 if (sp->pp_tlf) 2871 (sp->pp_tlf)(sp); 2872 } 2873 2874 static void 2875 sppp_lcp_scr(struct sppp *sp) 2876 { 2877 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2878 int i = 0; 2879 u_short authproto; 2880 2881 KASSERT(sppp_locked(sp)); 2882 2883 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2884 if (! sp->lcp.magic) 2885 sp->lcp.magic = cprng_fast32(); 2886 opt[i++] = LCP_OPT_MAGIC; 2887 opt[i++] = 6; 2888 opt[i++] = sp->lcp.magic >> 24; 2889 opt[i++] = sp->lcp.magic >> 16; 2890 opt[i++] = sp->lcp.magic >> 8; 2891 opt[i++] = sp->lcp.magic; 2892 } 2893 2894 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2895 opt[i++] = LCP_OPT_MRU; 2896 opt[i++] = 4; 2897 opt[i++] = sp->lcp.mru >> 8; 2898 opt[i++] = sp->lcp.mru; 2899 } 2900 2901 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2902 authproto = sp->hisauth.proto; 2903 opt[i++] = LCP_OPT_AUTH_PROTO; 2904 opt[i++] = authproto == PPP_CHAP? 5: 4; 2905 opt[i++] = authproto >> 8; 2906 opt[i++] = authproto; 2907 if (authproto == PPP_CHAP) 2908 opt[i++] = CHAP_MD5; 2909 } 2910 2911 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2912 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2913 } 2914 2915 /* 2916 * Check the open NCPs, return true if at least one NCP is open. 2917 */ 2918 static int 2919 sppp_ncp_check(struct sppp *sp) 2920 { 2921 int i, mask; 2922 2923 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2924 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2925 return 1; 2926 return 0; 2927 } 2928 2929 /* 2930 * Re-check the open NCPs and see if we should terminate the link. 2931 * Called by the NCPs during their tlf action handling. 2932 */ 2933 static void 2934 sppp_lcp_check_and_close(struct sppp *sp) 2935 { 2936 KASSERT(sppp_locked(sp)); 2937 2938 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2939 /* don't bother, we are already going down */ 2940 return; 2941 2942 if (sppp_ncp_check(sp)) 2943 return; 2944 lcp.Close(sp); 2945 } 2946 2947 2948 /* 2949 *--------------------------------------------------------------------------* 2950 * * 2951 * The IPCP implementation. * 2952 * * 2953 *--------------------------------------------------------------------------* 2954 */ 2955 2956 static void 2957 sppp_ipcp_init(struct sppp *sp) 2958 { 2959 int error; 2960 2961 sppp_lock_enter(sp); 2962 sp->ipcp.opts = 0; 2963 sp->ipcp.flags = 0; 2964 sp->state[IDX_IPCP] = STATE_INITIAL; 2965 sp->fail_counter[IDX_IPCP] = 0; 2966 sp->pp_seq[IDX_IPCP] = 0; 2967 sp->pp_rseq[IDX_IPCP] = 0; 2968 callout_init(&sp->ch[IDX_IPCP], 0); 2969 2970 error = workqueue_create(&sp->ipcp.update_addrs_wq, "ipcp_update_addrs", 2971 sppp_update_ip_addrs_work, sp, PRI_SOFTNET, IPL_NET, 0); 2972 if (error) 2973 panic("%s: update_addrs workqueue_create failed (%d)\n", 2974 __func__, error); 2975 sp->ipcp.update_addrs_q = pcq_create(IPCP_UPDATE_LIMIT, KM_SLEEP); 2976 2977 sp->ipcp.update_addrs_enqueued = 0; 2978 sppp_lock_exit(sp); 2979 } 2980 2981 static void 2982 sppp_ipcp_up(struct sppp *sp) 2983 { 2984 KASSERT(sppp_locked(sp)); 2985 sppp_up_event(&ipcp, sp); 2986 } 2987 2988 static void 2989 sppp_ipcp_down(struct sppp *sp) 2990 { 2991 KASSERT(sppp_locked(sp)); 2992 sppp_down_event(&ipcp, sp); 2993 } 2994 2995 static void 2996 sppp_ipcp_open(struct sppp *sp) 2997 { 2998 STDDCL; 2999 uint32_t myaddr, hisaddr; 3000 3001 KASSERT(sppp_locked(sp)); 3002 3003 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 3004 sp->ipcp.req_myaddr = 0; 3005 sp->ipcp.req_hisaddr = 0; 3006 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 3007 3008 #ifdef INET 3009 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3010 #else 3011 myaddr = hisaddr = 0; 3012 #endif 3013 /* 3014 * If we don't have his address, this probably means our 3015 * interface doesn't want to talk IP at all. (This could 3016 * be the case if somebody wants to speak only IPX, for 3017 * example.) Don't open IPCP in this case. 3018 */ 3019 if (hisaddr == 0) { 3020 /* XXX this message should go away */ 3021 if (debug) 3022 log(LOG_DEBUG, "%s: ipcp_open(): no IP interface\n", 3023 ifp->if_xname); 3024 return; 3025 } 3026 3027 if (myaddr == 0) { 3028 /* 3029 * I don't have an assigned address, so i need to 3030 * negotiate my address. 3031 */ 3032 sp->ipcp.flags |= IPCP_MYADDR_DYN; 3033 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3034 } 3035 if (hisaddr == 1) { 3036 /* 3037 * XXX - remove this hack! 3038 * remote has no valid address, we need to get one assigned. 3039 */ 3040 sp->ipcp.flags |= IPCP_HISADDR_DYN; 3041 } 3042 sppp_open_event(&ipcp, sp); 3043 } 3044 3045 static void 3046 sppp_ipcp_close(struct sppp *sp) 3047 { 3048 3049 KASSERT(sppp_locked(sp)); 3050 sppp_close_event(&ipcp, sp); 3051 3052 #ifdef INET 3053 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 3054 /* 3055 * Some address was dynamic, clear it again. 3056 */ 3057 sppp_clear_ip_addrs(sp); 3058 #endif 3059 } 3060 3061 static void 3062 sppp_ipcp_TO(void *cookie) 3063 { 3064 struct sppp *sp = cookie; 3065 3066 KASSERT(!sppp_locked(sp)); 3067 3068 sppp_lock_enter(sp); 3069 sppp_to_event(&ipcp, (struct sppp *)cookie); 3070 sppp_lock_exit(sp); 3071 } 3072 3073 /* 3074 * Analyze a configure request. Return true if it was agreeable, and 3075 * caused action sca, false if it has been rejected or nak'ed, and 3076 * caused action scn. (The return value is used to make the state 3077 * transition decision in the state automaton.) 3078 */ 3079 static int 3080 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3081 { 3082 u_char *buf, *r, *p, l, blen; 3083 struct ifnet *ifp = &sp->pp_if; 3084 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3085 uint32_t hisaddr, desiredaddr; 3086 3087 KASSERT(sppp_locked(sp)); 3088 len -= 4; 3089 origlen = len; 3090 /* 3091 * Make sure to allocate a buf that can at least hold a 3092 * conf-nak with an `address' option. We might need it below. 3093 */ 3094 blen = len < 6 ? 6 : len; 3095 buf = r = malloc (blen, M_TEMP, M_NOWAIT); 3096 if (! buf) 3097 return (0); 3098 3099 /* pass 1: see if we can recognize them */ 3100 if (debug) 3101 log(LOG_DEBUG, "%s: ipcp parse opts:", 3102 ifp->if_xname); 3103 p = (void *)(h + 1); 3104 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3105 /* Sanity check option length */ 3106 if (l > len) { 3107 /* XXX should we just RXJ? */ 3108 addlog("%s: malicious IPCP option received, dropping\n", 3109 ifp->if_xname); 3110 goto drop; 3111 } 3112 if (debug) 3113 addlog(" %s", sppp_ipcp_opt_name(*p)); 3114 switch (*p) { 3115 #ifdef notyet 3116 case IPCP_OPT_COMPRESSION: 3117 if (len >= 6 && l >= 6) { 3118 /* correctly formed compress option */ 3119 continue; 3120 } 3121 if (debug) 3122 addlog(" [invalid]"); 3123 break; 3124 #endif 3125 case IPCP_OPT_ADDRESS: 3126 if (len >= 6 && l == 6) { 3127 /* correctly formed address option */ 3128 continue; 3129 } 3130 if (debug) 3131 addlog(" [invalid]"); 3132 break; 3133 default: 3134 /* Others not supported. */ 3135 if (debug) 3136 addlog(" [rej]"); 3137 break; 3138 } 3139 /* Add the option to rejected list. */ 3140 if (rlen + l > blen) { 3141 if (debug) 3142 addlog(" [overflow]"); 3143 continue; 3144 } 3145 memcpy(r, p, l); 3146 r += l; 3147 rlen += l; 3148 } 3149 if (rlen) { 3150 if (debug) 3151 addlog(" send conf-rej\n"); 3152 sppp_cp_send(sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 3153 goto end; 3154 } else if (debug) 3155 addlog("\n"); 3156 3157 /* pass 2: parse option values */ 3158 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 3159 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 3160 else 3161 #ifdef INET 3162 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 3163 #else 3164 hisaddr = 0; 3165 #endif 3166 if (debug) 3167 log(LOG_DEBUG, "%s: ipcp parse opt values: ", 3168 ifp->if_xname); 3169 p = (void *)(h + 1); 3170 len = origlen; 3171 for (rlen=0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3172 if (debug) 3173 addlog(" %s", sppp_ipcp_opt_name(*p)); 3174 switch (*p) { 3175 #ifdef notyet 3176 case IPCP_OPT_COMPRESSION: 3177 continue; 3178 #endif 3179 case IPCP_OPT_ADDRESS: 3180 desiredaddr = p[2] << 24 | p[3] << 16 | 3181 p[4] << 8 | p[5]; 3182 if (desiredaddr == hisaddr || 3183 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 3184 /* 3185 * Peer's address is same as our value, 3186 * this is agreeable. Gonna conf-ack 3187 * it. 3188 */ 3189 if (debug) 3190 addlog(" %s [ack]", 3191 sppp_dotted_quad(hisaddr)); 3192 /* record that we've seen it already */ 3193 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 3194 sp->ipcp.req_hisaddr = desiredaddr; 3195 hisaddr = desiredaddr; 3196 continue; 3197 } 3198 /* 3199 * The address wasn't agreeable. This is either 3200 * he sent us 0.0.0.0, asking to assign him an 3201 * address, or he send us another address not 3202 * matching our value. Either case, we gonna 3203 * conf-nak it with our value. 3204 */ 3205 if (debug) { 3206 if (desiredaddr == 0) 3207 addlog(" [addr requested]"); 3208 else 3209 addlog(" %s [not agreed]", 3210 sppp_dotted_quad(desiredaddr)); 3211 } 3212 3213 p[2] = hisaddr >> 24; 3214 p[3] = hisaddr >> 16; 3215 p[4] = hisaddr >> 8; 3216 p[5] = hisaddr; 3217 break; 3218 } 3219 if (rlen + l > blen) { 3220 if (debug) 3221 addlog(" [overflow]"); 3222 continue; 3223 } 3224 /* Add the option to nak'ed list. */ 3225 memcpy(r, p, l); 3226 r += l; 3227 rlen += l; 3228 } 3229 3230 /* 3231 * If we are about to conf-ack the request, but haven't seen 3232 * his address so far, gonna conf-nak it instead, with the 3233 * `address' option present and our idea of his address being 3234 * filled in there, to request negotiation of both addresses. 3235 * 3236 * XXX This can result in an endless req - nak loop if peer 3237 * doesn't want to send us his address. Q: What should we do 3238 * about it? XXX A: implement the max-failure counter. 3239 */ 3240 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 3241 buf[0] = IPCP_OPT_ADDRESS; 3242 buf[1] = 6; 3243 buf[2] = hisaddr >> 24; 3244 buf[3] = hisaddr >> 16; 3245 buf[4] = hisaddr >> 8; 3246 buf[5] = hisaddr; 3247 rlen = 6; 3248 if (debug) 3249 addlog(" still need hisaddr"); 3250 } 3251 3252 if (rlen) { 3253 if (debug) 3254 addlog(" send conf-nak\n"); 3255 sppp_cp_send(sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 3256 } else { 3257 if (debug) 3258 addlog(" send conf-ack\n"); 3259 sppp_cp_send(sp, PPP_IPCP, CONF_ACK, h->ident, origlen, h + 1); 3260 } 3261 3262 end: 3263 free(buf, M_TEMP); 3264 return (rlen == 0); 3265 3266 drop: 3267 free(buf, M_TEMP); 3268 return -1; 3269 } 3270 3271 /* 3272 * Analyze the IPCP Configure-Reject option list, and adjust our 3273 * negotiation. 3274 */ 3275 static void 3276 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3277 { 3278 u_char *buf, *p, l, blen; 3279 struct ifnet *ifp = &sp->pp_if; 3280 int debug = ifp->if_flags & IFF_DEBUG; 3281 3282 KASSERT(sppp_locked(sp)); 3283 3284 len -= 4; 3285 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 3286 if (!buf) 3287 return; 3288 3289 if (debug) 3290 log(LOG_DEBUG, "%s: ipcp rej opts:", 3291 ifp->if_xname); 3292 3293 p = (void *)(h + 1); 3294 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3295 /* Sanity check option length */ 3296 if (l > len) { 3297 /* XXX should we just RXJ? */ 3298 addlog("%s: malicious IPCP option received, dropping\n", 3299 ifp->if_xname); 3300 goto drop; 3301 } 3302 if (debug) 3303 addlog(" %s", sppp_ipcp_opt_name(*p)); 3304 switch (*p) { 3305 case IPCP_OPT_ADDRESS: 3306 /* 3307 * Peer doesn't grok address option. This is 3308 * bad. XXX Should we better give up here? 3309 */ 3310 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 3311 break; 3312 #ifdef notyet 3313 case IPCP_OPT_COMPRESS: 3314 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 3315 break; 3316 #endif 3317 } 3318 } 3319 if (debug) 3320 addlog("\n"); 3321 drop: 3322 free(buf, M_TEMP); 3323 return; 3324 } 3325 3326 /* 3327 * Analyze the IPCP Configure-NAK option list, and adjust our 3328 * negotiation. 3329 */ 3330 static void 3331 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3332 { 3333 u_char *p, l; 3334 struct ifnet *ifp = &sp->pp_if; 3335 int debug = ifp->if_flags & IFF_DEBUG; 3336 uint32_t wantaddr; 3337 3338 KASSERT(sppp_locked(sp)); 3339 3340 len -= 4; 3341 3342 if (debug) 3343 log(LOG_DEBUG, "%s: ipcp nak opts:", 3344 ifp->if_xname); 3345 3346 p = (void *)(h + 1); 3347 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3348 /* Sanity check option length */ 3349 if (l > len) { 3350 /* XXX should we just RXJ? */ 3351 addlog("%s: malicious IPCP option received, dropping\n", 3352 ifp->if_xname); 3353 return; 3354 } 3355 if (debug) 3356 addlog(" %s", sppp_ipcp_opt_name(*p)); 3357 switch (*p) { 3358 case IPCP_OPT_ADDRESS: 3359 /* 3360 * Peer doesn't like our local IP address. See 3361 * if we can do something for him. We'll drop 3362 * him our address then. 3363 */ 3364 if (len >= 6 && l == 6) { 3365 wantaddr = p[2] << 24 | p[3] << 16 | 3366 p[4] << 8 | p[5]; 3367 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3368 if (debug) 3369 addlog(" [wantaddr %s]", 3370 sppp_dotted_quad(wantaddr)); 3371 /* 3372 * When doing dynamic address assignment, 3373 * we accept his offer. Otherwise, we 3374 * ignore it and thus continue to negotiate 3375 * our already existing value. 3376 */ 3377 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3378 if (debug) 3379 addlog(" [agree]"); 3380 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3381 sp->ipcp.req_myaddr = wantaddr; 3382 } 3383 } 3384 break; 3385 3386 case IPCP_OPT_PRIMDNS: 3387 if (len >= 6 && l == 6) { 3388 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3389 p[4] << 8 | p[5]; 3390 } 3391 break; 3392 3393 case IPCP_OPT_SECDNS: 3394 if (len >= 6 && l == 6) { 3395 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3396 p[4] << 8 | p[5]; 3397 } 3398 break; 3399 #ifdef notyet 3400 case IPCP_OPT_COMPRESS: 3401 /* 3402 * Peer wants different compression parameters. 3403 */ 3404 break; 3405 #endif 3406 } 3407 } 3408 if (debug) 3409 addlog("\n"); 3410 } 3411 3412 static void 3413 sppp_ipcp_tlu(struct sppp *sp) 3414 { 3415 #ifdef INET 3416 KASSERT(sppp_locked(sp)); 3417 /* we are up. Set addresses and notify anyone interested */ 3418 sppp_set_ip_addrs(sp); 3419 #endif 3420 } 3421 3422 static void 3423 sppp_ipcp_tld(struct sppp *sp) 3424 { 3425 } 3426 3427 static void 3428 sppp_ipcp_tls(struct sppp *sp) 3429 { 3430 KASSERT(sppp_locked(sp)); 3431 /* indicate to LCP that it must stay alive */ 3432 sp->lcp.protos |= (1 << IDX_IPCP); 3433 } 3434 3435 static void 3436 sppp_ipcp_tlf(struct sppp *sp) 3437 { 3438 KASSERT(sppp_locked(sp)); 3439 /* we no longer need LCP */ 3440 sp->lcp.protos &= ~(1 << IDX_IPCP); 3441 } 3442 3443 static void 3444 sppp_ipcp_scr(struct sppp *sp) 3445 { 3446 uint8_t opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3447 #ifdef INET 3448 uint32_t ouraddr; 3449 #endif 3450 int i = 0; 3451 3452 KASSERT(sppp_locked(sp)); 3453 3454 #ifdef notyet 3455 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3456 opt[i++] = IPCP_OPT_COMPRESSION; 3457 opt[i++] = 6; 3458 opt[i++] = 0; /* VJ header compression */ 3459 opt[i++] = 0x2d; /* VJ header compression */ 3460 opt[i++] = max_slot_id; 3461 opt[i++] = comp_slot_id; 3462 } 3463 #endif 3464 3465 #ifdef INET 3466 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3467 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3468 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3469 else 3470 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3471 opt[i++] = IPCP_OPT_ADDRESS; 3472 opt[i++] = 6; 3473 opt[i++] = ouraddr >> 24; 3474 opt[i++] = ouraddr >> 16; 3475 opt[i++] = ouraddr >> 8; 3476 opt[i++] = ouraddr; 3477 } 3478 #endif 3479 3480 if (sp->query_dns & 1) { 3481 opt[i++] = IPCP_OPT_PRIMDNS; 3482 opt[i++] = 6; 3483 opt[i++] = sp->dns_addrs[0] >> 24; 3484 opt[i++] = sp->dns_addrs[0] >> 16; 3485 opt[i++] = sp->dns_addrs[0] >> 8; 3486 opt[i++] = sp->dns_addrs[0]; 3487 } 3488 if (sp->query_dns & 2) { 3489 opt[i++] = IPCP_OPT_SECDNS; 3490 opt[i++] = 6; 3491 opt[i++] = sp->dns_addrs[1] >> 24; 3492 opt[i++] = sp->dns_addrs[1] >> 16; 3493 opt[i++] = sp->dns_addrs[1] >> 8; 3494 opt[i++] = sp->dns_addrs[1]; 3495 } 3496 3497 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3498 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3499 } 3500 3501 3502 /* 3503 *--------------------------------------------------------------------------* 3504 * * 3505 * The IPv6CP implementation. * 3506 * * 3507 *--------------------------------------------------------------------------* 3508 */ 3509 3510 #ifdef INET6 3511 static void 3512 sppp_ipv6cp_init(struct sppp *sp) 3513 { 3514 sppp_lock_enter(sp); 3515 sp->ipv6cp.opts = 0; 3516 sp->ipv6cp.flags = 0; 3517 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3518 sp->fail_counter[IDX_IPV6CP] = 0; 3519 sp->pp_seq[IDX_IPV6CP] = 0; 3520 sp->pp_rseq[IDX_IPV6CP] = 0; 3521 callout_init(&sp->ch[IDX_IPV6CP], 0); 3522 sppp_lock_exit(sp); 3523 } 3524 3525 static void 3526 sppp_ipv6cp_up(struct sppp *sp) 3527 { 3528 KASSERT(sppp_locked(sp)); 3529 sppp_up_event(&ipv6cp, sp); 3530 } 3531 3532 static void 3533 sppp_ipv6cp_down(struct sppp *sp) 3534 { 3535 KASSERT(sppp_locked(sp)); 3536 sppp_down_event(&ipv6cp, sp); 3537 } 3538 3539 static void 3540 sppp_ipv6cp_open(struct sppp *sp) 3541 { 3542 STDDCL; 3543 struct in6_addr myaddr, hisaddr; 3544 3545 KASSERT(sppp_locked(sp)); 3546 3547 #ifdef IPV6CP_MYIFID_DYN 3548 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3549 #else 3550 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3551 #endif 3552 3553 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3554 /* 3555 * If we don't have our address, this probably means our 3556 * interface doesn't want to talk IPv6 at all. (This could 3557 * be the case if somebody wants to speak only IPX, for 3558 * example.) Don't open IPv6CP in this case. 3559 */ 3560 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3561 /* XXX this message should go away */ 3562 if (debug) 3563 log(LOG_DEBUG, "%s: ipv6cp_open(): no IPv6 interface\n", 3564 ifp->if_xname); 3565 return; 3566 } 3567 3568 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3569 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3570 sppp_open_event(&ipv6cp, sp); 3571 } 3572 3573 static void 3574 sppp_ipv6cp_close(struct sppp *sp) 3575 { 3576 KASSERT(sppp_locked(sp)); 3577 sppp_close_event(&ipv6cp, sp); 3578 } 3579 3580 static void 3581 sppp_ipv6cp_TO(void *cookie) 3582 { 3583 struct sppp *sp = cookie; 3584 KASSERT(!sppp_locked(sp)); 3585 3586 sppp_lock_enter(sp); 3587 sppp_to_event(&ipv6cp, (struct sppp *)cookie); 3588 sppp_lock_exit(sp); 3589 } 3590 3591 /* 3592 * Analyze a configure request. Return true if it was agreeable, and 3593 * caused action sca, false if it has been rejected or nak'ed, and 3594 * caused action scn. (The return value is used to make the state 3595 * transition decision in the state automaton.) 3596 */ 3597 static int 3598 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3599 { 3600 u_char *buf, *r, *p, l, blen; 3601 struct ifnet *ifp = &sp->pp_if; 3602 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3603 struct in6_addr myaddr, desiredaddr, suggestaddr; 3604 int ifidcount; 3605 int type; 3606 int collision, nohisaddr; 3607 3608 KASSERT(sppp_locked(sp)); 3609 3610 len -= 4; 3611 origlen = len; 3612 /* 3613 * Make sure to allocate a buf that can at least hold a 3614 * conf-nak with an `address' option. We might need it below. 3615 */ 3616 blen = len < 6 ? 6 : len; 3617 buf = r = malloc (blen, M_TEMP, M_NOWAIT); 3618 if (! buf) 3619 return (0); 3620 3621 /* pass 1: see if we can recognize them */ 3622 if (debug) 3623 log(LOG_DEBUG, "%s: ipv6cp parse opts:", 3624 ifp->if_xname); 3625 p = (void *)(h + 1); 3626 ifidcount = 0; 3627 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3628 /* Sanity check option length */ 3629 if (l > len) { 3630 /* XXX just RXJ? */ 3631 addlog("%s: received malicious IPCPv6 option, " 3632 "dropping\n", ifp->if_xname); 3633 goto drop; 3634 } 3635 if (debug) 3636 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3637 switch (*p) { 3638 case IPV6CP_OPT_IFID: 3639 if (len >= 10 && l == 10 && ifidcount == 0) { 3640 /* correctly formed address option */ 3641 ifidcount++; 3642 continue; 3643 } 3644 if (debug) 3645 addlog(" [invalid]"); 3646 break; 3647 #ifdef notyet 3648 case IPV6CP_OPT_COMPRESSION: 3649 if (len >= 4 && l >= 4) { 3650 /* correctly formed compress option */ 3651 continue; 3652 } 3653 if (debug) 3654 addlog(" [invalid]"); 3655 break; 3656 #endif 3657 default: 3658 /* Others not supported. */ 3659 if (debug) 3660 addlog(" [rej]"); 3661 break; 3662 } 3663 if (rlen + l > blen) { 3664 if (debug) 3665 addlog(" [overflow]"); 3666 continue; 3667 } 3668 /* Add the option to rejected list. */ 3669 memcpy(r, p, l); 3670 r += l; 3671 rlen += l; 3672 } 3673 if (rlen) { 3674 if (debug) 3675 addlog(" send conf-rej\n"); 3676 sppp_cp_send(sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3677 goto end; 3678 } else if (debug) 3679 addlog("\n"); 3680 3681 /* pass 2: parse option values */ 3682 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3683 if (debug) 3684 log(LOG_DEBUG, "%s: ipv6cp parse opt values: ", 3685 ifp->if_xname); 3686 p = (void *)(h + 1); 3687 len = origlen; 3688 type = CONF_ACK; 3689 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3690 if (debug) 3691 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3692 switch (*p) { 3693 #ifdef notyet 3694 case IPV6CP_OPT_COMPRESSION: 3695 continue; 3696 #endif 3697 case IPV6CP_OPT_IFID: 3698 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3699 memcpy(&desiredaddr.s6_addr[8], &p[2], 8); 3700 collision = (memcmp(&desiredaddr.s6_addr[8], 3701 &myaddr.s6_addr[8], 8) == 0); 3702 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3703 3704 desiredaddr.s6_addr16[0] = htons(0xfe80); 3705 (void)in6_setscope(&desiredaddr, &sp->pp_if, NULL); 3706 3707 if (!collision && !nohisaddr) { 3708 /* no collision, hisaddr known - Conf-Ack */ 3709 type = CONF_ACK; 3710 3711 if (debug) { 3712 addlog(" %s [%s]", 3713 ip6_sprintf(&desiredaddr), 3714 sppp_cp_type_name(type)); 3715 } 3716 continue; 3717 } 3718 3719 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3720 if (collision && nohisaddr) { 3721 /* collision, hisaddr unknown - Conf-Rej */ 3722 type = CONF_REJ; 3723 memset(&p[2], 0, 8); 3724 } else { 3725 /* 3726 * - no collision, hisaddr unknown, or 3727 * - collision, hisaddr known 3728 * Conf-Nak, suggest hisaddr 3729 */ 3730 type = CONF_NAK; 3731 sppp_suggest_ip6_addr(sp, &suggestaddr); 3732 memcpy(&p[2], &suggestaddr.s6_addr[8], 8); 3733 } 3734 if (debug) 3735 addlog(" %s [%s]", ip6_sprintf(&desiredaddr), 3736 sppp_cp_type_name(type)); 3737 break; 3738 } 3739 if (rlen + l > blen) { 3740 if (debug) 3741 addlog(" [overflow]"); 3742 continue; 3743 } 3744 /* Add the option to nak'ed list. */ 3745 memcpy(r, p, l); 3746 r += l; 3747 rlen += l; 3748 } 3749 3750 if (rlen == 0 && type == CONF_ACK) { 3751 if (debug) 3752 addlog(" send %s\n", sppp_cp_type_name(type)); 3753 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, origlen, h + 1); 3754 } else { 3755 #ifdef notdef 3756 if (type == CONF_ACK) 3757 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3758 #endif 3759 3760 if (debug) { 3761 addlog(" send %s suggest %s\n", 3762 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr)); 3763 } 3764 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3765 } 3766 3767 end: 3768 free(buf, M_TEMP); 3769 return (rlen == 0); 3770 3771 drop: 3772 free(buf, M_TEMP); 3773 return -1; 3774 } 3775 3776 /* 3777 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3778 * negotiation. 3779 */ 3780 static void 3781 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3782 { 3783 u_char *buf, *p, l, blen; 3784 struct ifnet *ifp = &sp->pp_if; 3785 int debug = ifp->if_flags & IFF_DEBUG; 3786 3787 KASSERT(sppp_locked(sp)); 3788 3789 len -= 4; 3790 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 3791 if (!buf) 3792 return; 3793 3794 if (debug) 3795 log(LOG_DEBUG, "%s: ipv6cp rej opts:", 3796 ifp->if_xname); 3797 3798 p = (void *)(h + 1); 3799 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3800 if (l > len) { 3801 /* XXX just RXJ? */ 3802 addlog("%s: received malicious IPCPv6 option, " 3803 "dropping\n", ifp->if_xname); 3804 goto drop; 3805 } 3806 if (debug) 3807 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3808 switch (*p) { 3809 case IPV6CP_OPT_IFID: 3810 /* 3811 * Peer doesn't grok address option. This is 3812 * bad. XXX Should we better give up here? 3813 */ 3814 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3815 break; 3816 #ifdef notyet 3817 case IPV6CP_OPT_COMPRESS: 3818 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3819 break; 3820 #endif 3821 } 3822 } 3823 if (debug) 3824 addlog("\n"); 3825 drop: 3826 free(buf, M_TEMP); 3827 return; 3828 } 3829 3830 /* 3831 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3832 * negotiation. 3833 */ 3834 static void 3835 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3836 { 3837 u_char *buf, *p, l, blen; 3838 struct ifnet *ifp = &sp->pp_if; 3839 int debug = ifp->if_flags & IFF_DEBUG; 3840 struct in6_addr suggestaddr; 3841 3842 KASSERT(sppp_locked(sp)); 3843 3844 len -= 4; 3845 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 3846 if (!buf) 3847 return; 3848 3849 if (debug) 3850 log(LOG_DEBUG, "%s: ipv6cp nak opts:", 3851 ifp->if_xname); 3852 3853 p = (void *)(h + 1); 3854 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3855 if (l > len) { 3856 /* XXX just RXJ? */ 3857 addlog("%s: received malicious IPCPv6 option, " 3858 "dropping\n", ifp->if_xname); 3859 goto drop; 3860 } 3861 if (debug) 3862 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3863 switch (*p) { 3864 case IPV6CP_OPT_IFID: 3865 /* 3866 * Peer doesn't like our local ifid. See 3867 * if we can do something for him. We'll drop 3868 * him our address then. 3869 */ 3870 if (len < 10 || l != 10) 3871 break; 3872 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3873 suggestaddr.s6_addr16[0] = htons(0xfe80); 3874 (void)in6_setscope(&suggestaddr, &sp->pp_if, NULL); 3875 memcpy(&suggestaddr.s6_addr[8], &p[2], 8); 3876 3877 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3878 if (debug) 3879 addlog(" [suggestaddr %s]", 3880 ip6_sprintf(&suggestaddr)); 3881 #ifdef IPV6CP_MYIFID_DYN 3882 /* 3883 * When doing dynamic address assignment, 3884 * we accept his offer. 3885 */ 3886 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3887 struct in6_addr lastsuggest; 3888 /* 3889 * If <suggested myaddr from peer> equals to 3890 * <hisaddr we have suggested last time>, 3891 * we have a collision. generate new random 3892 * ifid. 3893 */ 3894 sppp_suggest_ip6_addr(&lastsuggest); 3895 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3896 lastsuggest)) { 3897 if (debug) 3898 addlog(" [random]"); 3899 sppp_gen_ip6_addr(sp, &suggestaddr); 3900 } 3901 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3902 if (debug) 3903 addlog(" [agree]"); 3904 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3905 } 3906 #else 3907 /* 3908 * Since we do not do dynamic address assignment, 3909 * we ignore it and thus continue to negotiate 3910 * our already existing value. This can possibly 3911 * go into infinite request-reject loop. 3912 * 3913 * This is not likely because we normally use 3914 * ifid based on MAC-address. 3915 * If you have no ethernet card on the node, too bad. 3916 * XXX should we use fail_counter? 3917 */ 3918 #endif 3919 break; 3920 #ifdef notyet 3921 case IPV6CP_OPT_COMPRESS: 3922 /* 3923 * Peer wants different compression parameters. 3924 */ 3925 break; 3926 #endif 3927 } 3928 } 3929 if (debug) 3930 addlog("\n"); 3931 drop: 3932 free(buf, M_TEMP); 3933 return; 3934 } 3935 3936 static void 3937 sppp_ipv6cp_tlu(struct sppp *sp) 3938 { 3939 KASSERT(sppp_locked(sp)); 3940 /* we are up - notify isdn daemon */ 3941 if (sp->pp_con) 3942 sp->pp_con(sp); 3943 } 3944 3945 static void 3946 sppp_ipv6cp_tld(struct sppp *sp) 3947 { 3948 } 3949 3950 static void 3951 sppp_ipv6cp_tls(struct sppp *sp) 3952 { 3953 KASSERT(sppp_locked(sp)); 3954 /* indicate to LCP that it must stay alive */ 3955 sp->lcp.protos |= (1 << IDX_IPV6CP); 3956 } 3957 3958 static void 3959 sppp_ipv6cp_tlf(struct sppp *sp) 3960 { 3961 KASSERT(sppp_locked(sp)); 3962 /* we no longer need LCP */ 3963 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3964 } 3965 3966 static void 3967 sppp_ipv6cp_scr(struct sppp *sp) 3968 { 3969 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3970 struct in6_addr ouraddr; 3971 int i = 0; 3972 3973 KASSERT(sppp_locked(sp)); 3974 3975 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3976 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3977 opt[i++] = IPV6CP_OPT_IFID; 3978 opt[i++] = 10; 3979 memcpy(&opt[i], &ouraddr.s6_addr[8], 8); 3980 i += 8; 3981 } 3982 3983 #ifdef notyet 3984 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 3985 opt[i++] = IPV6CP_OPT_COMPRESSION; 3986 opt[i++] = 4; 3987 opt[i++] = 0; /* TBD */ 3988 opt[i++] = 0; /* TBD */ 3989 /* variable length data may follow */ 3990 } 3991 #endif 3992 3993 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 3994 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 3995 } 3996 #else /*INET6*/ 3997 static void 3998 sppp_ipv6cp_init(struct sppp *sp) 3999 { 4000 } 4001 4002 static void 4003 sppp_ipv6cp_up(struct sppp *sp) 4004 { 4005 } 4006 4007 static void 4008 sppp_ipv6cp_down(struct sppp *sp) 4009 { 4010 } 4011 4012 static void 4013 sppp_ipv6cp_open(struct sppp *sp) 4014 { 4015 } 4016 4017 static void 4018 sppp_ipv6cp_close(struct sppp *sp) 4019 { 4020 } 4021 4022 static void 4023 sppp_ipv6cp_TO(void *sp) 4024 { 4025 } 4026 4027 static int 4028 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, 4029 int len) 4030 { 4031 return 0; 4032 } 4033 4034 static void 4035 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, 4036 int len) 4037 { 4038 } 4039 4040 static void 4041 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, 4042 int len) 4043 { 4044 } 4045 4046 static void 4047 sppp_ipv6cp_tlu(struct sppp *sp) 4048 { 4049 } 4050 4051 static void 4052 sppp_ipv6cp_tld(struct sppp *sp) 4053 { 4054 } 4055 4056 static void 4057 sppp_ipv6cp_tls(struct sppp *sp) 4058 { 4059 } 4060 4061 static void 4062 sppp_ipv6cp_tlf(struct sppp *sp) 4063 { 4064 } 4065 4066 static void 4067 sppp_ipv6cp_scr(struct sppp *sp) 4068 { 4069 } 4070 #endif /*INET6*/ 4071 4072 4073 /* 4074 *--------------------------------------------------------------------------* 4075 * * 4076 * The CHAP implementation. * 4077 * * 4078 *--------------------------------------------------------------------------* 4079 */ 4080 4081 /* 4082 * The authentication protocols don't employ a full-fledged state machine as 4083 * the control protocols do, since they do have Open and Close events, but 4084 * not Up and Down, nor are they explicitly terminated. Also, use of the 4085 * authentication protocols may be different in both directions (this makes 4086 * sense, think of a machine that never accepts incoming calls but only 4087 * calls out, it doesn't require the called party to authenticate itself). 4088 * 4089 * Our state machine for the local authentication protocol (we are requesting 4090 * the peer to authenticate) looks like: 4091 * 4092 * RCA- 4093 * +--------------------------------------------+ 4094 * V scn,tld| 4095 * +--------+ Close +---------+ RCA+ 4096 * | |<----------------------------------| |------+ 4097 * +--->| Closed | TO* | Opened | sca | 4098 * | | |-----+ +-------| |<-----+ 4099 * | +--------+ irc | | +---------+ 4100 * | ^ | | ^ 4101 * | | | | | 4102 * | | | | | 4103 * | TO-| | | | 4104 * | |tld TO+ V | | 4105 * | | +------->+ | | 4106 * | | | | | | 4107 * | +--------+ V | | 4108 * | | |<----+<--------------------+ | 4109 * | | Req- | scr | 4110 * | | Sent | | 4111 * | | | | 4112 * | +--------+ | 4113 * | RCA- | | RCA+ | 4114 * +------+ +------------------------------------------+ 4115 * scn,tld sca,irc,ict,tlu 4116 * 4117 * 4118 * with: 4119 * 4120 * Open: LCP reached authentication phase 4121 * Close: LCP reached terminate phase 4122 * 4123 * RCA+: received reply (pap-req, chap-response), acceptable 4124 * RCN: received reply (pap-req, chap-response), not acceptable 4125 * TO+: timeout with restart counter >= 0 4126 * TO-: timeout with restart counter < 0 4127 * TO*: reschedule timeout for CHAP 4128 * 4129 * scr: send request packet (none for PAP, chap-challenge) 4130 * sca: send ack packet (pap-ack, chap-success) 4131 * scn: send nak packet (pap-nak, chap-failure) 4132 * ict: initialize re-challenge timer (CHAP only) 4133 * 4134 * tlu: this-layer-up, LCP reaches network phase 4135 * tld: this-layer-down, LCP enters terminate phase 4136 * 4137 * Note that in CHAP mode, after sending a new challenge, while the state 4138 * automaton falls back into Req-Sent state, it doesn't signal a tld 4139 * event to LCP, so LCP remains in network phase. Only after not getting 4140 * any response (or after getting an unacceptable response), CHAP closes, 4141 * causing LCP to enter terminate phase. 4142 * 4143 * With PAP, there is no initial request that can be sent. The peer is 4144 * expected to send one based on the successful negotiation of PAP as 4145 * the authentication protocol during the LCP option negotiation. 4146 * 4147 * Incoming authentication protocol requests (remote requests 4148 * authentication, we are peer) don't employ a state machine at all, 4149 * they are simply answered. Some peers [Ascend P50 firmware rev 4150 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 4151 * still in authentication phase (thereby violating the standard that 4152 * demands that these NCP packets are to be discarded), so we keep 4153 * track of the peer demanding us to authenticate, and only proceed to 4154 * phase network once we've seen a positive acknowledge for the 4155 * authentication. 4156 */ 4157 4158 /* 4159 * Handle incoming CHAP packets. 4160 */ 4161 void 4162 sppp_chap_input(struct sppp *sp, struct mbuf *m) 4163 { 4164 STDDCL; 4165 struct lcp_header *h; 4166 int len, x; 4167 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 4168 int value_len, name_len; 4169 MD5_CTX ctx; 4170 4171 KASSERT(!sppp_locked(sp)); 4172 4173 len = m->m_pkthdr.len; 4174 if (len < 4) { 4175 if (debug) 4176 log(LOG_DEBUG, 4177 "%s: chap invalid packet length: %d bytes\n", 4178 ifp->if_xname, len); 4179 return; 4180 } 4181 h = mtod(m, struct lcp_header *); 4182 if (len > ntohs(h->len)) 4183 len = ntohs(h->len); 4184 4185 switch (h->type) { 4186 /* challenge, failure and success are his authproto */ 4187 case CHAP_CHALLENGE: 4188 sppp_lock_enter(sp); 4189 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4190 /* can't do anything useful */ 4191 sp->pp_auth_failures++; 4192 printf("%s: chap input without my name and my secret being set\n", 4193 ifp->if_xname); 4194 sppp_lock_exit(sp); 4195 break; 4196 } 4197 value = 1 + (u_char *)(h + 1); 4198 value_len = value[-1]; 4199 name = value + value_len; 4200 name_len = len - value_len - 5; 4201 if (name_len < 0) { 4202 if (debug) { 4203 log(LOG_DEBUG, 4204 "%s: chap corrupted challenge " 4205 "<%s id=0x%x len=%d", 4206 ifp->if_xname, 4207 sppp_auth_type_name(PPP_CHAP, h->type), 4208 h->ident, ntohs(h->len)); 4209 if (len > 4) 4210 sppp_print_bytes((u_char *)(h + 1), 4211 len - 4); 4212 addlog(">\n"); 4213 } 4214 sppp_lock_exit(sp); 4215 break; 4216 } 4217 4218 if (debug) { 4219 log(LOG_DEBUG, 4220 "%s: chap input <%s id=0x%x len=%d name=", 4221 ifp->if_xname, 4222 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 4223 ntohs(h->len)); 4224 sppp_print_string((char *) name, name_len); 4225 addlog(" value-size=%d value=", value_len); 4226 sppp_print_bytes(value, value_len); 4227 addlog(">\n"); 4228 } 4229 4230 /* Compute reply value. */ 4231 MD5Init(&ctx); 4232 MD5Update(&ctx, &h->ident, 1); 4233 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 4234 MD5Update(&ctx, value, value_len); 4235 MD5Final(digest, &ctx); 4236 dsize = sizeof digest; 4237 4238 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 4239 sizeof dsize, (const char *)&dsize, 4240 sizeof digest, digest, 4241 sp->myauth.name_len, 4242 sp->myauth.name, 4243 0); 4244 sppp_lock_exit(sp); 4245 break; 4246 4247 case CHAP_SUCCESS: 4248 sppp_lock_enter(sp); 4249 if (debug) { 4250 log(LOG_DEBUG, "%s: chap success", 4251 ifp->if_xname); 4252 if (len > 4) { 4253 addlog(": "); 4254 sppp_print_string((char *)(h + 1), len - 4); 4255 } 4256 addlog("\n"); 4257 } 4258 x = splnet(); 4259 sp->pp_auth_failures = 0; 4260 sp->pp_flags &= ~PP_NEEDAUTH; 4261 if (sp->myauth.proto == PPP_CHAP && 4262 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4263 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 4264 /* 4265 * We are authenticator for CHAP but didn't 4266 * complete yet. Leave it to tlu to proceed 4267 * to network phase. 4268 */ 4269 splx(x); 4270 sppp_lock_exit(sp); 4271 break; 4272 } 4273 splx(x); 4274 sppp_phase_network(sp); 4275 sppp_lock_exit(sp); 4276 break; 4277 4278 case CHAP_FAILURE: 4279 x = splnet(); 4280 sppp_lock_enter(sp); 4281 sp->pp_auth_failures++; 4282 splx(x); 4283 if (debug) { 4284 log(LOG_INFO, "%s: chap failure", 4285 ifp->if_xname); 4286 if (len > 4) { 4287 addlog(": "); 4288 sppp_print_string((char *)(h + 1), len - 4); 4289 } 4290 addlog("\n"); 4291 } else 4292 log(LOG_INFO, "%s: chap failure\n", 4293 ifp->if_xname); 4294 sppp_lock_exit(sp); 4295 /* await LCP shutdown by authenticator */ 4296 break; 4297 4298 /* response is my authproto */ 4299 case CHAP_RESPONSE: 4300 sppp_lock_enter(sp); 4301 if (sp->hisauth.secret == NULL) { 4302 /* can't do anything useful */ 4303 printf("%s: chap input without his secret being set\n", 4304 ifp->if_xname); 4305 sppp_lock_exit(sp); 4306 break; 4307 } 4308 value = 1 + (u_char *)(h + 1); 4309 value_len = value[-1]; 4310 name = value + value_len; 4311 name_len = len - value_len - 5; 4312 if (name_len < 0) { 4313 if (debug) { 4314 log(LOG_DEBUG, 4315 "%s: chap corrupted response " 4316 "<%s id=0x%x len=%d", 4317 ifp->if_xname, 4318 sppp_auth_type_name(PPP_CHAP, h->type), 4319 h->ident, ntohs(h->len)); 4320 if (len > 4) 4321 sppp_print_bytes((u_char *)(h + 1), 4322 len - 4); 4323 addlog(">\n"); 4324 } 4325 sppp_lock_exit(sp); 4326 break; 4327 } 4328 if (h->ident != sp->confid[IDX_CHAP]) { 4329 if (debug) 4330 log(LOG_DEBUG, 4331 "%s: chap dropping response for old ID " 4332 "(got %d, expected %d)\n", 4333 ifp->if_xname, 4334 h->ident, sp->confid[IDX_CHAP]); 4335 sppp_lock_exit(sp); 4336 break; 4337 } 4338 if (sp->hisauth.name != NULL && 4339 (name_len != sp->hisauth.name_len 4340 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 4341 log(LOG_INFO, "%s: chap response, his name ", 4342 ifp->if_xname); 4343 sppp_print_string(name, name_len); 4344 addlog(" != expected "); 4345 sppp_print_string(sp->hisauth.name, 4346 sp->hisauth.name_len); 4347 addlog("\n"); 4348 goto chap_failure; 4349 } 4350 if (debug) { 4351 log(LOG_DEBUG, "%s: chap input(%s) " 4352 "<%s id=0x%x len=%d name=", 4353 ifp->if_xname, 4354 sppp_state_name(sp->state[IDX_CHAP]), 4355 sppp_auth_type_name(PPP_CHAP, h->type), 4356 h->ident, ntohs(h->len)); 4357 sppp_print_string((char *)name, name_len); 4358 addlog(" value-size=%d value=", value_len); 4359 sppp_print_bytes(value, value_len); 4360 addlog(">\n"); 4361 } 4362 if (value_len != sizeof(sp->myauth.challenge)) { 4363 if (debug) 4364 log(LOG_DEBUG, 4365 "%s: chap bad hash value length: " 4366 "%d bytes, should be %ld\n", 4367 ifp->if_xname, value_len, 4368 (long) sizeof(sp->myauth.challenge)); 4369 goto chap_failure; 4370 } 4371 4372 MD5Init(&ctx); 4373 MD5Update(&ctx, &h->ident, 1); 4374 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 4375 MD5Update(&ctx, sp->myauth.challenge, sizeof(sp->myauth.challenge)); 4376 MD5Final(digest, &ctx); 4377 4378 #define FAILMSG "Failed..." 4379 #define SUCCMSG "Welcome!" 4380 4381 if (value_len != sizeof digest || 4382 memcmp(digest, value, value_len) != 0) { 4383 chap_failure: 4384 KASSERT(sppp_locked(sp)); 4385 /* action scn, tld */ 4386 x = splnet(); 4387 sp->pp_auth_failures++; 4388 splx(x); 4389 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 4390 sizeof(FAILMSG) - 1, (const u_char *)FAILMSG, 4391 0); 4392 chap.tld(sp); 4393 sppp_lock_exit(sp); 4394 break; 4395 } 4396 sp->pp_auth_failures = 0; 4397 /* action sca, perhaps tlu */ 4398 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 4399 sp->state[IDX_CHAP] == STATE_OPENED) 4400 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 4401 sizeof(SUCCMSG) - 1, (const u_char *)SUCCMSG, 4402 0); 4403 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 4404 sppp_cp_change_state(&chap, sp, STATE_OPENED); 4405 chap.tlu(sp); 4406 } 4407 sppp_lock_exit(sp); 4408 break; 4409 4410 default: 4411 /* Unknown CHAP packet type -- ignore. */ 4412 sppp_lock_enter(sp); 4413 if (debug) { 4414 log(LOG_DEBUG, "%s: chap unknown input(%s) " 4415 "<0x%x id=0x%xh len=%d", 4416 ifp->if_xname, 4417 sppp_state_name(sp->state[IDX_CHAP]), 4418 h->type, h->ident, ntohs(h->len)); 4419 if (len > 4) 4420 sppp_print_bytes((u_char *)(h + 1), len - 4); 4421 addlog(">\n"); 4422 } 4423 sppp_lock_exit(sp); 4424 break; 4425 4426 } 4427 } 4428 4429 void 4430 sppp_lock_enter(struct sppp *sp) 4431 { 4432 if (sp->pp_lock) 4433 mutex_enter(sp->pp_lock); 4434 } 4435 4436 void 4437 sppp_lock_exit(struct sppp *sp) 4438 { 4439 if (sp->pp_lock) 4440 mutex_exit(sp->pp_lock); 4441 } 4442 4443 int 4444 sppp_locked(struct sppp *sp) 4445 { 4446 return (!(sp->pp_lock) || mutex_owned(sp->pp_lock)); 4447 } 4448 4449 static void 4450 sppp_chap_init(struct sppp *sp) 4451 { 4452 sppp_lock_enter(sp); 4453 /* Chap doesn't have STATE_INITIAL at all. */ 4454 sp->state[IDX_CHAP] = STATE_CLOSED; 4455 sp->fail_counter[IDX_CHAP] = 0; 4456 sp->pp_seq[IDX_CHAP] = 0; 4457 sp->pp_rseq[IDX_CHAP] = 0; 4458 callout_init(&sp->ch[IDX_CHAP], 0); 4459 sppp_lock_exit(sp); 4460 } 4461 4462 static void 4463 sppp_chap_open(struct sppp *sp) 4464 { 4465 KASSERT(sppp_locked(sp)); 4466 if (sp->hisauth.proto == PPP_CHAP && 4467 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4468 /* we are authenticator for CHAP, start it */ 4469 chap.scr(sp); 4470 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4471 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4472 } 4473 /* nothing to be done if we are peer, await a challenge */ 4474 } 4475 4476 static void 4477 sppp_chap_close(struct sppp *sp) 4478 { 4479 KASSERT(sppp_locked(sp)); 4480 4481 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4482 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4483 } 4484 4485 static void 4486 sppp_chap_TO(void *cookie) 4487 { 4488 struct sppp *sp = (struct sppp *)cookie; 4489 STDDCL; 4490 int s; 4491 4492 KASSERT(!sppp_locked(sp)); 4493 4494 s = splnet(); 4495 sppp_lock_enter(sp); 4496 4497 if (debug) 4498 log(LOG_DEBUG, "%s: chap TO(%s) rst_counter = %d\n", 4499 ifp->if_xname, 4500 sppp_state_name(sp->state[IDX_CHAP]), 4501 sp->rst_counter[IDX_CHAP]); 4502 4503 if (--sp->rst_counter[IDX_CHAP] < 0) 4504 /* TO- event */ 4505 switch (sp->state[IDX_CHAP]) { 4506 case STATE_REQ_SENT: 4507 chap.tld(sp); 4508 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4509 break; 4510 } 4511 else 4512 /* TO+ (or TO*) event */ 4513 switch (sp->state[IDX_CHAP]) { 4514 case STATE_OPENED: 4515 /* TO* event */ 4516 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4517 /* fall through */ 4518 case STATE_REQ_SENT: 4519 chap.scr(sp); 4520 /* sppp_cp_change_state() will restart the timer */ 4521 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4522 break; 4523 } 4524 4525 sppp_lock_exit(sp); 4526 splx(s); 4527 } 4528 4529 static void 4530 sppp_chap_tlu(struct sppp *sp) 4531 { 4532 STDDCL; 4533 int i, x; 4534 4535 KASSERT(sppp_locked(sp)); 4536 i = 0; 4537 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4538 4539 /* 4540 * Some broken CHAP implementations (Conware CoNet, firmware 4541 * 4.0.?) don't want to re-authenticate their CHAP once the 4542 * initial challenge-response exchange has taken place. 4543 * Provide for an option to avoid rechallenges. 4544 */ 4545 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4546 /* 4547 * Compute the re-challenge timeout. This will yield 4548 * a number between 300 and 810 seconds. 4549 */ 4550 i = 300 + ((unsigned)(cprng_fast32() & 0xff00) >> 7); 4551 4552 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4553 } 4554 4555 if (debug) { 4556 log(LOG_DEBUG, 4557 "%s: chap %s, ", 4558 ifp->if_xname, 4559 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu"); 4560 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) 4561 addlog("next re-challenge in %d seconds\n", i); 4562 else 4563 addlog("re-challenging supressed\n"); 4564 } 4565 4566 x = splnet(); 4567 sp->pp_auth_failures = 0; 4568 /* indicate to LCP that we need to be closed down */ 4569 sp->lcp.protos |= (1 << IDX_CHAP); 4570 4571 if (sp->pp_flags & PP_NEEDAUTH) { 4572 /* 4573 * Remote is authenticator, but his auth proto didn't 4574 * complete yet. Defer the transition to network 4575 * phase. 4576 */ 4577 splx(x); 4578 return; 4579 } 4580 splx(x); 4581 4582 /* 4583 * If we are already in phase network, we are done here. This 4584 * is the case if this is a dummy tlu event after a re-challenge. 4585 */ 4586 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4587 sppp_phase_network(sp); 4588 } 4589 4590 static void 4591 sppp_chap_tld(struct sppp *sp) 4592 { 4593 STDDCL; 4594 4595 KASSERT(sppp_locked(sp)); 4596 4597 if (debug) 4598 log(LOG_DEBUG, "%s: chap tld\n", ifp->if_xname); 4599 callout_stop(&sp->ch[IDX_CHAP]); 4600 sp->lcp.protos &= ~(1 << IDX_CHAP); 4601 4602 lcp.Close(sp); 4603 } 4604 4605 static void 4606 sppp_chap_scr(struct sppp *sp) 4607 { 4608 uint32_t *ch; 4609 u_char clen = 4 * sizeof(uint32_t); 4610 4611 KASSERT(sppp_locked(sp)); 4612 4613 if (sp->hisauth.name == NULL) { 4614 /* can't do anything useful */ 4615 printf("%s: chap starting without my name being set\n", 4616 sp->pp_if.if_xname); 4617 return; 4618 } 4619 4620 /* Compute random challenge. */ 4621 ch = (uint32_t *)sp->myauth.challenge; 4622 cprng_strong(kern_cprng, ch, clen, 0); 4623 4624 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4625 4626 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4627 sizeof clen, (const char *)&clen, 4628 sizeof(sp->myauth.challenge), sp->myauth.challenge, 4629 sp->myauth.name_len, 4630 sp->myauth.name, 4631 0); 4632 } 4633 4634 /* 4635 *--------------------------------------------------------------------------* 4636 * * 4637 * The PAP implementation. * 4638 * * 4639 *--------------------------------------------------------------------------* 4640 */ 4641 /* 4642 * For PAP, we need to keep a little state also if we are the peer, not the 4643 * authenticator. This is since we don't get a request to authenticate, but 4644 * have to repeatedly authenticate ourself until we got a response (or the 4645 * retry counter is expired). 4646 */ 4647 4648 /* 4649 * Handle incoming PAP packets. */ 4650 static void 4651 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4652 { 4653 STDDCL; 4654 struct lcp_header *h; 4655 int len, x; 4656 u_char mlen; 4657 char *name, *secret; 4658 int name_len, secret_len; 4659 4660 KASSERT(!sppp_locked(sp)); 4661 4662 /* 4663 * Malicious input might leave this uninitialized, so 4664 * init to an impossible value. 4665 */ 4666 secret_len = -1; 4667 4668 len = m->m_pkthdr.len; 4669 if (len < 5) { 4670 if (debug) 4671 log(LOG_DEBUG, 4672 "%s: pap invalid packet length: %d bytes\n", 4673 ifp->if_xname, len); 4674 return; 4675 } 4676 h = mtod(m, struct lcp_header *); 4677 if (len > ntohs(h->len)) 4678 len = ntohs(h->len); 4679 switch (h->type) { 4680 /* PAP request is my authproto */ 4681 case PAP_REQ: 4682 sppp_lock_enter(sp); 4683 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4684 /* can't do anything useful */ 4685 printf("%s: " 4686 "pap request without his name and his secret being set\n", 4687 ifp->if_xname); 4688 sppp_lock_exit(sp); 4689 break; 4690 } 4691 name = 1 + (u_char *)(h + 1); 4692 name_len = name[-1]; 4693 secret = name + name_len + 1; 4694 if (name_len > len - 6 || 4695 (secret_len = secret[-1]) > len - 6 - name_len) { 4696 if (debug) { 4697 log(LOG_DEBUG, "%s: pap corrupted input " 4698 "<%s id=0x%x len=%d", 4699 ifp->if_xname, 4700 sppp_auth_type_name(PPP_PAP, h->type), 4701 h->ident, ntohs(h->len)); 4702 if (len > 4) 4703 sppp_print_bytes((u_char *)(h + 1), 4704 len - 4); 4705 addlog(">\n"); 4706 } 4707 sppp_lock_exit(sp); 4708 break; 4709 } 4710 if (debug) { 4711 log(LOG_DEBUG, "%s: pap input(%s) " 4712 "<%s id=0x%x len=%d name=", 4713 ifp->if_xname, 4714 sppp_state_name(sp->state[IDX_PAP]), 4715 sppp_auth_type_name(PPP_PAP, h->type), 4716 h->ident, ntohs(h->len)); 4717 sppp_print_string((char *)name, name_len); 4718 addlog(" secret="); 4719 sppp_print_string((char *)secret, secret_len); 4720 addlog(">\n"); 4721 } 4722 if (name_len != sp->hisauth.name_len || 4723 secret_len != sp->hisauth.secret_len || 4724 memcmp(name, sp->hisauth.name, name_len) != 0 || 4725 memcmp(secret, sp->hisauth.secret, secret_len) != 0) { 4726 /* action scn, tld */ 4727 sp->pp_auth_failures++; 4728 mlen = sizeof(FAILMSG) - 1; 4729 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4730 sizeof mlen, (const char *)&mlen, 4731 sizeof(FAILMSG) - 1, (const u_char *)FAILMSG, 4732 0); 4733 pap.tld(sp); 4734 sppp_lock_exit(sp); 4735 break; 4736 } 4737 /* action sca, perhaps tlu */ 4738 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4739 sp->state[IDX_PAP] == STATE_OPENED) { 4740 mlen = sizeof(SUCCMSG) - 1; 4741 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4742 sizeof mlen, (const char *)&mlen, 4743 sizeof(SUCCMSG) - 1, (const u_char *)SUCCMSG, 4744 0); 4745 } 4746 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4747 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4748 pap.tlu(sp); 4749 } 4750 sppp_lock_exit(sp); 4751 break; 4752 4753 /* ack and nak are his authproto */ 4754 case PAP_ACK: 4755 sppp_lock_enter(sp); 4756 callout_stop(&sp->pap_my_to_ch); 4757 if (debug) { 4758 log(LOG_DEBUG, "%s: pap success", 4759 ifp->if_xname); 4760 name = 1 + (u_char *)(h + 1); 4761 name_len = name[-1]; 4762 if (len > 5 && name_len < len+4) { 4763 addlog(": "); 4764 sppp_print_string(name, name_len); 4765 } 4766 addlog("\n"); 4767 } 4768 x = splnet(); 4769 sp->pp_auth_failures = 0; 4770 sp->pp_flags &= ~PP_NEEDAUTH; 4771 if (sp->myauth.proto == PPP_PAP && 4772 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4773 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4774 /* 4775 * We are authenticator for PAP but didn't 4776 * complete yet. Leave it to tlu to proceed 4777 * to network phase. 4778 */ 4779 splx(x); 4780 sppp_lock_exit(sp); 4781 break; 4782 } 4783 splx(x); 4784 sppp_phase_network(sp); 4785 sppp_lock_exit(sp); 4786 break; 4787 4788 case PAP_NAK: 4789 sppp_lock_enter(sp); 4790 callout_stop(&sp->pap_my_to_ch); 4791 sp->pp_auth_failures++; 4792 if (debug) { 4793 log(LOG_INFO, "%s: pap failure", 4794 ifp->if_xname); 4795 name = 1 + (u_char *)(h + 1); 4796 name_len = name[-1]; 4797 if (len > 5 && name_len < len+4) { 4798 addlog(": "); 4799 sppp_print_string(name, name_len); 4800 } 4801 addlog("\n"); 4802 } else 4803 log(LOG_INFO, "%s: pap failure\n", 4804 ifp->if_xname); 4805 /* await LCP shutdown by authenticator */ 4806 sppp_lock_exit(sp); 4807 break; 4808 4809 default: 4810 /* Unknown PAP packet type -- ignore. */ 4811 sppp_lock_enter(sp); 4812 if (debug) { 4813 log(LOG_DEBUG, "%s: pap corrupted input " 4814 "<0x%x id=0x%x len=%d", 4815 ifp->if_xname, 4816 h->type, h->ident, ntohs(h->len)); 4817 if (len > 4) 4818 sppp_print_bytes((u_char *)(h + 1), len - 4); 4819 addlog(">\n"); 4820 } 4821 sppp_lock_exit(sp); 4822 break; 4823 4824 } 4825 } 4826 4827 static void 4828 sppp_pap_init(struct sppp *sp) 4829 { 4830 /* PAP doesn't have STATE_INITIAL at all. */ 4831 sppp_lock_enter(sp); 4832 sp->state[IDX_PAP] = STATE_CLOSED; 4833 sp->fail_counter[IDX_PAP] = 0; 4834 sp->pp_seq[IDX_PAP] = 0; 4835 sp->pp_rseq[IDX_PAP] = 0; 4836 callout_init(&sp->ch[IDX_PAP], 0); 4837 callout_init(&sp->pap_my_to_ch, 0); 4838 sppp_lock_exit(sp); 4839 } 4840 4841 static void 4842 sppp_pap_open(struct sppp *sp) 4843 { 4844 KASSERT(sppp_locked(sp)); 4845 4846 if (sp->hisauth.proto == PPP_PAP && 4847 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4848 /* we are authenticator for PAP, start our timer */ 4849 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4850 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4851 } 4852 if (sp->myauth.proto == PPP_PAP) { 4853 /* we are peer, send a request, and start a timer */ 4854 pap.scr(sp); 4855 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4856 sppp_pap_my_TO, sp); 4857 } 4858 } 4859 4860 static void 4861 sppp_pap_close(struct sppp *sp) 4862 { 4863 KASSERT(sppp_locked(sp)); 4864 if (sp->state[IDX_PAP] != STATE_CLOSED) 4865 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4866 } 4867 4868 /* 4869 * That's the timeout routine if we are authenticator. Since the 4870 * authenticator is basically passive in PAP, we can't do much here. 4871 */ 4872 static void 4873 sppp_pap_TO(void *cookie) 4874 { 4875 struct sppp *sp = (struct sppp *)cookie; 4876 STDDCL; 4877 int s; 4878 4879 KASSERT(!sppp_locked(sp)); 4880 4881 s = splnet(); 4882 sppp_lock_enter(sp); 4883 if (debug) 4884 log(LOG_DEBUG, "%s: pap TO(%s) rst_counter = %d\n", 4885 ifp->if_xname, 4886 sppp_state_name(sp->state[IDX_PAP]), 4887 sp->rst_counter[IDX_PAP]); 4888 4889 if (--sp->rst_counter[IDX_PAP] < 0) 4890 /* TO- event */ 4891 switch (sp->state[IDX_PAP]) { 4892 case STATE_REQ_SENT: 4893 pap.tld(sp); 4894 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4895 break; 4896 } 4897 else 4898 /* TO+ event, not very much we could do */ 4899 switch (sp->state[IDX_PAP]) { 4900 case STATE_REQ_SENT: 4901 /* sppp_cp_change_state() will restart the timer */ 4902 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4903 break; 4904 } 4905 4906 sppp_lock_exit(sp); 4907 splx(s); 4908 } 4909 4910 /* 4911 * That's the timeout handler if we are peer. Since the peer is active, 4912 * we need to retransmit our PAP request since it is apparently lost. 4913 * XXX We should impose a max counter. 4914 */ 4915 static void 4916 sppp_pap_my_TO(void *cookie) 4917 { 4918 struct sppp *sp = (struct sppp *)cookie; 4919 STDDCL; 4920 4921 KASSERT(!sppp_locked(sp)); 4922 4923 sppp_lock_enter(sp); 4924 if (debug) 4925 log(LOG_DEBUG, "%s: pap peer TO\n", 4926 ifp->if_xname); 4927 4928 pap.scr(sp); 4929 sppp_lock_exit(sp); 4930 } 4931 4932 static void 4933 sppp_pap_tlu(struct sppp *sp) 4934 { 4935 STDDCL; 4936 int x; 4937 4938 KASSERT(sppp_locked(sp)); 4939 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4940 4941 if (debug) 4942 log(LOG_DEBUG, "%s: %s tlu\n", 4943 ifp->if_xname, pap.name); 4944 4945 x = splnet(); 4946 sp->pp_auth_failures = 0; 4947 /* indicate to LCP that we need to be closed down */ 4948 sp->lcp.protos |= (1 << IDX_PAP); 4949 4950 if (sp->pp_flags & PP_NEEDAUTH) { 4951 /* 4952 * Remote is authenticator, but his auth proto didn't 4953 * complete yet. Defer the transition to network 4954 * phase. 4955 */ 4956 splx(x); 4957 return; 4958 } 4959 splx(x); 4960 sppp_phase_network(sp); 4961 } 4962 4963 static void 4964 sppp_pap_tld(struct sppp *sp) 4965 { 4966 STDDCL; 4967 4968 KASSERT(sppp_locked(sp)); 4969 4970 if (debug) 4971 log(LOG_DEBUG, "%s: pap tld\n", ifp->if_xname); 4972 callout_stop(&sp->ch[IDX_PAP]); 4973 callout_stop(&sp->pap_my_to_ch); 4974 sp->lcp.protos &= ~(1 << IDX_PAP); 4975 4976 lcp.Close(sp); 4977 } 4978 4979 static void 4980 sppp_pap_scr(struct sppp *sp) 4981 { 4982 u_char idlen, pwdlen; 4983 4984 KASSERT(sppp_locked(sp)); 4985 4986 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4987 /* can't do anything useful */ 4988 printf("%s: pap starting without my name and secret being set\n", 4989 sp->pp_if.if_xname); 4990 return; 4991 } 4992 4993 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4994 pwdlen = sp->myauth.secret_len; 4995 idlen = sp->myauth.name_len; 4996 4997 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 4998 sizeof idlen, (const char *)&idlen, 4999 idlen, sp->myauth.name, 5000 sizeof pwdlen, (const char *)&pwdlen, 5001 pwdlen, sp->myauth.secret, 5002 0); 5003 } 5004 5005 /* 5006 * Random miscellaneous functions. 5007 */ 5008 5009 /* 5010 * Send a PAP or CHAP proto packet. 5011 * 5012 * Varadic function, each of the elements for the ellipsis is of type 5013 * ``size_t mlen, const u_char *msg''. Processing will stop iff 5014 * mlen == 0. 5015 * NOTE: never declare variadic functions with types subject to type 5016 * promotion (i.e. u_char). This is asking for big trouble depending 5017 * on the architecture you are on... 5018 */ 5019 5020 static void 5021 sppp_auth_send(const struct cp *cp, struct sppp *sp, 5022 unsigned int type, unsigned int id, 5023 ...) 5024 { 5025 STDDCL; 5026 struct lcp_header *lh; 5027 struct mbuf *m; 5028 u_char *p; 5029 int len; 5030 size_t pkthdrlen; 5031 unsigned int mlen; 5032 const char *msg; 5033 va_list ap; 5034 5035 KASSERT(sppp_locked(sp)); 5036 5037 MGETHDR(m, M_DONTWAIT, MT_DATA); 5038 if (! m) 5039 return; 5040 m_reset_rcvif(m); 5041 5042 if (sp->pp_flags & PP_NOFRAMING) { 5043 *mtod(m, uint16_t *) = htons(cp->proto); 5044 pkthdrlen = 2; 5045 lh = (struct lcp_header *)(mtod(m, uint8_t *)+2); 5046 } else { 5047 struct ppp_header *h; 5048 h = mtod(m, struct ppp_header *); 5049 h->address = PPP_ALLSTATIONS; /* broadcast address */ 5050 h->control = PPP_UI; /* Unnumbered Info */ 5051 h->protocol = htons(cp->proto); 5052 pkthdrlen = PPP_HEADER_LEN; 5053 5054 lh = (struct lcp_header *)(h + 1); 5055 } 5056 5057 lh->type = type; 5058 lh->ident = id; 5059 p = (u_char *)(lh + 1); 5060 5061 va_start(ap, id); 5062 len = 0; 5063 5064 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 5065 msg = va_arg(ap, const char *); 5066 len += mlen; 5067 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 5068 va_end(ap); 5069 m_freem(m); 5070 return; 5071 } 5072 5073 memcpy(p, msg, mlen); 5074 p += mlen; 5075 } 5076 va_end(ap); 5077 5078 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 5079 lh->len = htons(LCP_HEADER_LEN + len); 5080 5081 if (debug) { 5082 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 5083 ifp->if_xname, cp->name, 5084 sppp_auth_type_name(cp->proto, lh->type), 5085 lh->ident, ntohs(lh->len)); 5086 if (len) 5087 sppp_print_bytes((u_char *)(lh + 1), len); 5088 addlog(">\n"); 5089 } 5090 if (IF_QFULL(&sp->pp_cpq)) { 5091 IF_DROP(&sp->pp_fastq); 5092 IF_DROP(&ifp->if_snd); 5093 m_freem(m); 5094 ++ifp->if_oerrors; 5095 return; 5096 } else 5097 IF_ENQUEUE(&sp->pp_cpq, m); 5098 if (! (ifp->if_flags & IFF_OACTIVE)) { 5099 sppp_lock_exit(sp); 5100 if_start_lock(ifp); 5101 sppp_lock_enter(sp); 5102 } 5103 ifp->if_obytes += m->m_pkthdr.len + 3; 5104 } 5105 5106 /* 5107 * Send keepalive packets, every 10 seconds. 5108 */ 5109 static void 5110 sppp_keepalive(void *dummy) 5111 { 5112 struct sppp *sp; 5113 int s; 5114 time_t now; 5115 5116 SPPPQ_LOCK(); 5117 5118 s = splnet(); 5119 now = time_uptime; 5120 for (sp=spppq; sp; sp=sp->pp_next) { 5121 struct ifnet *ifp = NULL; 5122 5123 sppp_lock_enter(sp); 5124 ifp = &sp->pp_if; 5125 5126 /* check idle timeout */ 5127 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 5128 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 5129 /* idle timeout is enabled for this interface */ 5130 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 5131 if (ifp->if_flags & IFF_DEBUG) 5132 printf("%s: no activity for %lu seconds\n", 5133 sp->pp_if.if_xname, 5134 (unsigned long)(now-sp->pp_last_activity)); 5135 lcp.Close(sp); 5136 sppp_lock_exit(sp); 5137 continue; 5138 } 5139 } 5140 5141 /* Keepalive mode disabled or channel down? */ 5142 if (! (sp->pp_flags & PP_KEEPALIVE) || 5143 ! (ifp->if_flags & IFF_RUNNING)) { 5144 sppp_lock_exit(sp); 5145 continue; 5146 } 5147 5148 5149 /* No keepalive in PPP mode if LCP not opened yet. */ 5150 if (! (sp->pp_flags & PP_CISCO) && 5151 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 5152 sppp_lock_exit(sp); 5153 continue; 5154 } 5155 5156 /* No echo reply, but maybe user data passed through? */ 5157 if ((now - sp->pp_last_receive) < sp->pp_max_noreceive) { 5158 sp->pp_alivecnt = 0; 5159 sppp_lock_exit(sp); 5160 continue; 5161 } 5162 5163 if (sp->pp_alivecnt >= sp->pp_maxalive) { 5164 /* No keepalive packets got. Stop the interface. */ 5165 sppp_lock_exit(sp); 5166 if_down (ifp); 5167 sppp_lock_enter(sp); 5168 IF_PURGE(&sp->pp_cpq); 5169 if (! (sp->pp_flags & PP_CISCO)) { 5170 printf("%s: LCP keepalive timed out, going to restart the connection\n", 5171 ifp->if_xname); 5172 sp->pp_alivecnt = 0; 5173 5174 /* we are down, close all open protocols */ 5175 lcp.Close(sp); 5176 5177 /* And now prepare LCP to reestablish the link, if configured to do so. */ 5178 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 5179 5180 /* Close connection immediately, completition of this 5181 * will summon the magic needed to reestablish it. */ 5182 if (sp->pp_tlf) 5183 sp->pp_tlf(sp); 5184 5185 sppp_lock_exit(sp); 5186 continue; 5187 } 5188 } 5189 if (sp->pp_alivecnt < sp->pp_maxalive) 5190 ++sp->pp_alivecnt; 5191 if (sp->pp_flags & PP_CISCO) 5192 sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ, 5193 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 5194 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 5195 int32_t nmagic = htonl(sp->lcp.magic); 5196 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 5197 sppp_cp_send(sp, PPP_LCP, ECHO_REQ, 5198 sp->lcp.echoid, 4, &nmagic); 5199 } 5200 5201 sppp_lock_exit(sp); 5202 } 5203 splx(s); 5204 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 5205 5206 SPPPQ_UNLOCK(); 5207 } 5208 5209 #ifdef INET 5210 /* 5211 * Get both IP addresses. 5212 */ 5213 static void 5214 sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, uint32_t *srcmask) 5215 { 5216 struct ifnet *ifp = &sp->pp_if; 5217 struct ifaddr *ifa; 5218 struct sockaddr_in *si, *sm; 5219 uint32_t ssrc, ddst; 5220 5221 sm = NULL; 5222 ssrc = ddst = 0; 5223 /* 5224 * Pick the first AF_INET address from the list, 5225 * aliases don't make any sense on a p2p link anyway. 5226 */ 5227 si = 0; 5228 IFADDR_READER_FOREACH(ifa, ifp) { 5229 if (ifa->ifa_addr->sa_family == AF_INET) { 5230 si = (struct sockaddr_in *)ifa->ifa_addr; 5231 sm = (struct sockaddr_in *)ifa->ifa_netmask; 5232 if (si) 5233 break; 5234 } 5235 } 5236 if (ifa) { 5237 if (si && si->sin_addr.s_addr) { 5238 ssrc = si->sin_addr.s_addr; 5239 if (srcmask) 5240 *srcmask = ntohl(sm->sin_addr.s_addr); 5241 } 5242 5243 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 5244 if (si && si->sin_addr.s_addr) 5245 ddst = si->sin_addr.s_addr; 5246 } 5247 5248 if (dst) *dst = ntohl(ddst); 5249 if (src) *src = ntohl(ssrc); 5250 } 5251 5252 /* 5253 * Set IP addresses. Must be called at splnet. 5254 * If an address is 0, leave it the way it is. 5255 */ 5256 static void 5257 sppp_set_ip_addrs_work(struct work *wk, struct sppp *sp) 5258 { 5259 STDDCL; 5260 struct ifaddr *ifa; 5261 struct sockaddr_in *si, *dest; 5262 uint32_t myaddr = 0, hisaddr = 0; 5263 int s; 5264 5265 /* 5266 * Pick the first AF_INET address from the list, 5267 * aliases don't make any sense on a p2p link anyway. 5268 */ 5269 si = dest = NULL; 5270 s = pserialize_read_enter(); 5271 IFADDR_READER_FOREACH(ifa, ifp) { 5272 if (ifa->ifa_addr->sa_family == AF_INET) { 5273 si = (struct sockaddr_in *)ifa->ifa_addr; 5274 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5275 break; 5276 } 5277 } 5278 pserialize_read_exit(s); 5279 5280 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 5281 myaddr = sp->ipcp.req_myaddr; 5282 else if (si != NULL) 5283 myaddr = ntohl(si->sin_addr.s_addr); 5284 5285 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 5286 hisaddr = sp->ipcp.req_hisaddr; 5287 else if (dest != NULL) 5288 hisaddr = ntohl(dest->sin_addr.s_addr); 5289 5290 if (si != NULL && dest != NULL) { 5291 int error; 5292 struct sockaddr_in new_sin = *si; 5293 struct sockaddr_in new_dst = *dest; 5294 5295 if (myaddr != 0) 5296 new_sin.sin_addr.s_addr = htonl(myaddr); 5297 if (hisaddr != 0) { 5298 new_dst.sin_addr.s_addr = htonl(hisaddr); 5299 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) 5300 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 5301 } 5302 5303 in_addrhash_remove(ifatoia(ifa)); 5304 5305 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5306 5307 in_addrhash_insert(ifatoia(ifa)); 5308 5309 if (debug && error) 5310 { 5311 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5312 ifp->if_xname, __func__, error); 5313 } 5314 if (!error) { 5315 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5316 } 5317 } 5318 5319 if (ifp->if_mtu > sp->lcp.their_mru) { 5320 sp->pp_saved_mtu = ifp->if_mtu; 5321 ifp->if_mtu = sp->lcp.their_mru; 5322 if (debug) 5323 log(LOG_DEBUG, 5324 "%s: setting MTU to %" PRIu64 " bytes\n", 5325 ifp->if_xname, ifp->if_mtu); 5326 } 5327 5328 if (sp->pp_con) 5329 sp->pp_con(sp); 5330 } 5331 5332 static void 5333 sppp_set_ip_addrs(struct sppp *sp) 5334 { 5335 struct ifnet *ifp = &sp->pp_if; 5336 5337 if (!pcq_put(sp->ipcp.update_addrs_q, (void *)IPCP_SET_ADDRS)) { 5338 log(LOG_WARNING, "%s: cannot enqueued, ignore sppp_clear_ip_addrs\n", 5339 ifp->if_xname); 5340 return; 5341 } 5342 5343 if (atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1) == 1) 5344 return; 5345 5346 workqueue_enqueue(sp->ipcp.update_addrs_wq, &sp->ipcp.update_addrs_wk, NULL); 5347 } 5348 5349 /* 5350 * Clear IP addresses. Must be called at splnet. 5351 */ 5352 static void 5353 sppp_clear_ip_addrs_work(struct work *wk, struct sppp *sp) 5354 { 5355 STDDCL; 5356 struct ifaddr *ifa; 5357 struct sockaddr_in *si, *dest; 5358 int s; 5359 5360 /* 5361 * Pick the first AF_INET address from the list, 5362 * aliases don't make any sense on a p2p link anyway. 5363 */ 5364 si = dest = NULL; 5365 s = pserialize_read_enter(); 5366 IFADDR_READER_FOREACH(ifa, ifp) { 5367 if (ifa->ifa_addr->sa_family == AF_INET) { 5368 si = (struct sockaddr_in *)ifa->ifa_addr; 5369 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5370 break; 5371 } 5372 } 5373 pserialize_read_exit(s); 5374 5375 if (si != NULL) { 5376 struct sockaddr_in new_sin = *si; 5377 struct sockaddr_in new_dst = *dest; 5378 int error; 5379 5380 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 5381 new_sin.sin_addr.s_addr = 0; 5382 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 5383 new_dst.sin_addr.s_addr = sp->ipcp.saved_hisaddr; 5384 5385 in_addrhash_remove(ifatoia(ifa)); 5386 5387 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5388 5389 in_addrhash_insert(ifatoia(ifa)); 5390 5391 if (debug && error) 5392 { 5393 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5394 ifp->if_xname, __func__, error); 5395 } 5396 if (!error) { 5397 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5398 } 5399 } 5400 5401 if (sp->pp_saved_mtu > 0) { 5402 ifp->if_mtu = sp->pp_saved_mtu; 5403 sp->pp_saved_mtu = 0; 5404 if (debug) 5405 log(LOG_DEBUG, 5406 "%s: resetting MTU to %" PRIu64 " bytes\n", 5407 ifp->if_xname, ifp->if_mtu); 5408 } 5409 } 5410 5411 static void 5412 sppp_clear_ip_addrs(struct sppp *sp) 5413 { 5414 struct ifnet *ifp = &sp->pp_if; 5415 5416 if (!pcq_put(sp->ipcp.update_addrs_q, (void *)IPCP_CLEAR_ADDRS)) { 5417 log(LOG_WARNING, "%s: cannot enqueued, ignore sppp_clear_ip_addrs\n", 5418 ifp->if_xname); 5419 return; 5420 } 5421 5422 if (atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1) == 1) 5423 return; 5424 5425 workqueue_enqueue(sp->ipcp.update_addrs_wq, &sp->ipcp.update_addrs_wk, NULL); 5426 } 5427 5428 static void 5429 sppp_update_ip_addrs_work(struct work *wk, void *arg) 5430 { 5431 struct sppp *sp = arg; 5432 void *work; 5433 5434 atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 0); 5435 5436 while ((work = pcq_get(sp->ipcp.update_addrs_q)) != NULL) { 5437 int update = (intptr_t)work; 5438 5439 if (update == IPCP_SET_ADDRS) 5440 sppp_set_ip_addrs_work(wk, sp); 5441 else if (update == IPCP_CLEAR_ADDRS) 5442 sppp_clear_ip_addrs_work(wk, sp); 5443 } 5444 } 5445 #endif 5446 5447 #ifdef INET6 5448 /* 5449 * Get both IPv6 addresses. 5450 */ 5451 static void 5452 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 5453 struct in6_addr *srcmask) 5454 { 5455 struct ifnet *ifp = &sp->pp_if; 5456 struct ifaddr *ifa; 5457 struct sockaddr_in6 *si, *sm; 5458 struct in6_addr ssrc, ddst; 5459 5460 sm = NULL; 5461 memset(&ssrc, 0, sizeof(ssrc)); 5462 memset(&ddst, 0, sizeof(ddst)); 5463 /* 5464 * Pick the first link-local AF_INET6 address from the list, 5465 * aliases don't make any sense on a p2p link anyway. 5466 */ 5467 si = 0; 5468 IFADDR_READER_FOREACH(ifa, ifp) 5469 if (ifa->ifa_addr->sa_family == AF_INET6) { 5470 si = (struct sockaddr_in6 *)ifa->ifa_addr; 5471 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 5472 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) 5473 break; 5474 } 5475 if (ifa) { 5476 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 5477 memcpy(&ssrc, &si->sin6_addr, sizeof(ssrc)); 5478 if (srcmask) { 5479 memcpy(srcmask, &sm->sin6_addr, 5480 sizeof(*srcmask)); 5481 } 5482 } 5483 5484 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 5485 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 5486 memcpy(&ddst, &si->sin6_addr, sizeof(ddst)); 5487 } 5488 5489 if (dst) 5490 memcpy(dst, &ddst, sizeof(*dst)); 5491 if (src) 5492 memcpy(src, &ssrc, sizeof(*src)); 5493 } 5494 5495 #ifdef IPV6CP_MYIFID_DYN 5496 /* 5497 * Generate random ifid. 5498 */ 5499 static void 5500 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 5501 { 5502 /* TBD */ 5503 } 5504 5505 /* 5506 * Set my IPv6 address. Must be called at splnet. 5507 */ 5508 static void 5509 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 5510 { 5511 STDDCL; 5512 struct ifaddr *ifa; 5513 struct sockaddr_in6 *sin6; 5514 5515 /* 5516 * Pick the first link-local AF_INET6 address from the list, 5517 * aliases don't make any sense on a p2p link anyway. 5518 */ 5519 5520 sin6 = NULL; 5521 IFADDR_READER_FOREACH(ifa, ifp) 5522 { 5523 if (ifa->ifa_addr->sa_family == AF_INET6) 5524 { 5525 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 5526 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 5527 break; 5528 } 5529 } 5530 5531 if (ifa && sin6) 5532 { 5533 int error; 5534 struct sockaddr_in6 new_sin6 = *sin6; 5535 5536 memcpy(&new_sin6.sin6_addr, src, sizeof(new_sin6.sin6_addr)); 5537 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 5538 if (debug && error) 5539 { 5540 log(LOG_DEBUG, "%s: %s: in6_ifinit failed, error=%d\n", 5541 ifp->if_xname, __func__, error); 5542 } 5543 if (!error) { 5544 pfil_run_addrhooks(if_pfil, SIOCAIFADDR_IN6, ifa); 5545 } 5546 } 5547 } 5548 #endif 5549 5550 /* 5551 * Suggest a candidate address to be used by peer. 5552 */ 5553 static void 5554 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 5555 { 5556 struct in6_addr myaddr; 5557 struct timeval tv; 5558 5559 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 5560 5561 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 5562 microtime(&tv); 5563 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 5564 myaddr.s6_addr[14] ^= 0xff; 5565 myaddr.s6_addr[15] ^= 0xff; 5566 } else { 5567 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 5568 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 5569 } 5570 if (suggest) 5571 memcpy(suggest, &myaddr, sizeof(myaddr)); 5572 } 5573 #endif /*INET6*/ 5574 5575 /* 5576 * Process ioctl requests specific to the PPP interface. 5577 * Permissions have already been checked. 5578 */ 5579 static int 5580 sppp_params(struct sppp *sp, u_long cmd, void *data) 5581 { 5582 switch (cmd) { 5583 case SPPPGETAUTHCFG: 5584 { 5585 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5586 int error; 5587 size_t len; 5588 5589 sppp_lock_enter(sp); 5590 5591 cfg->myauthflags = sp->myauth.flags; 5592 cfg->hisauthflags = sp->hisauth.flags; 5593 strlcpy(cfg->ifname, sp->pp_if.if_xname, sizeof(cfg->ifname)); 5594 cfg->hisauth = 0; 5595 if (sp->hisauth.proto) 5596 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5597 cfg->myauth = 0; 5598 if (sp->myauth.proto) 5599 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5600 if (cfg->myname_length == 0) { 5601 if (sp->myauth.name != NULL) 5602 cfg->myname_length = sp->myauth.name_len + 1; 5603 } else { 5604 if (sp->myauth.name == NULL) { 5605 cfg->myname_length = 0; 5606 } else { 5607 len = sp->myauth.name_len + 1; 5608 5609 sppp_lock_exit(sp); 5610 5611 if (cfg->myname_length < len) 5612 return (ENAMETOOLONG); 5613 error = copyout(sp->myauth.name, cfg->myname, len); 5614 if (error) return error; 5615 5616 sppp_lock_enter(sp); 5617 } 5618 } 5619 if (cfg->hisname_length == 0) { 5620 if (sp->hisauth.name != NULL) 5621 cfg->hisname_length = sp->hisauth.name_len + 1; 5622 } else { 5623 if (sp->hisauth.name == NULL) { 5624 cfg->hisname_length = 0; 5625 } else { 5626 len = sp->hisauth.name_len + 1; 5627 5628 sppp_lock_exit(sp); 5629 if (cfg->hisname_length < len) 5630 return (ENAMETOOLONG); 5631 error = copyout(sp->hisauth.name, cfg->hisname, len); 5632 if (error) return error; 5633 sppp_lock_enter(sp); 5634 } 5635 } 5636 sppp_lock_exit(sp); 5637 } 5638 break; 5639 case SPPPSETAUTHCFG: 5640 { 5641 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5642 int error; 5643 5644 sppp_lock_enter(sp); 5645 5646 if (sp->myauth.name) { 5647 free(sp->myauth.name, M_DEVBUF); 5648 sp->myauth.name = NULL; 5649 } 5650 if (sp->myauth.secret) { 5651 free(sp->myauth.secret, M_DEVBUF); 5652 sp->myauth.secret = NULL; 5653 } 5654 if (sp->hisauth.name) { 5655 free(sp->hisauth.name, M_DEVBUF); 5656 sp->hisauth.name = NULL; 5657 } 5658 if (sp->hisauth.secret) { 5659 free(sp->hisauth.secret, M_DEVBUF); 5660 sp->hisauth.secret = NULL; 5661 } 5662 5663 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5664 if (cfg->hisname_length >= MCLBYTES) { 5665 sppp_lock_exit(sp); 5666 return (ENAMETOOLONG); 5667 } 5668 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5669 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5670 if (error) { 5671 free(sp->hisauth.name, M_DEVBUF); 5672 sp->hisauth.name = NULL; 5673 sppp_lock_exit(sp); 5674 return error; 5675 } 5676 sp->hisauth.name_len = cfg->hisname_length - 1; 5677 sp->hisauth.name[sp->hisauth.name_len] = 0; 5678 } 5679 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5680 if (cfg->hissecret_length >= MCLBYTES) { 5681 sppp_lock_exit(sp); 5682 return (ENAMETOOLONG); 5683 } 5684 sp->hisauth.secret = malloc(cfg->hissecret_length, 5685 M_DEVBUF, M_WAITOK); 5686 error = copyin(cfg->hissecret, sp->hisauth.secret, 5687 cfg->hissecret_length); 5688 if (error) { 5689 free(sp->hisauth.secret, M_DEVBUF); 5690 sp->hisauth.secret = NULL; 5691 sppp_lock_exit(sp); 5692 return error; 5693 } 5694 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5695 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5696 } 5697 if (cfg->myname != NULL && cfg->myname_length > 0) { 5698 if (cfg->myname_length >= MCLBYTES) { 5699 sppp_lock_exit(sp); 5700 return (ENAMETOOLONG); 5701 } 5702 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5703 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5704 if (error) { 5705 free(sp->myauth.name, M_DEVBUF); 5706 sp->myauth.name = NULL; 5707 sppp_lock_exit(sp); 5708 return error; 5709 } 5710 sp->myauth.name_len = cfg->myname_length - 1; 5711 sp->myauth.name[sp->myauth.name_len] = 0; 5712 } 5713 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5714 if (cfg->mysecret_length >= MCLBYTES) { 5715 sppp_lock_exit(sp); 5716 return (ENAMETOOLONG); 5717 } 5718 sp->myauth.secret = malloc(cfg->mysecret_length, 5719 M_DEVBUF, M_WAITOK); 5720 error = copyin(cfg->mysecret, sp->myauth.secret, 5721 cfg->mysecret_length); 5722 if (error) { 5723 free(sp->myauth.secret, M_DEVBUF); 5724 sp->myauth.secret = NULL; 5725 sppp_lock_exit(sp); 5726 return error; 5727 } 5728 sp->myauth.secret_len = cfg->mysecret_length - 1; 5729 sp->myauth.secret[sp->myauth.secret_len] = 0; 5730 } 5731 sp->myauth.flags = cfg->myauthflags; 5732 if (cfg->myauth) 5733 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5734 sp->hisauth.flags = cfg->hisauthflags; 5735 if (cfg->hisauth) 5736 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5737 sp->pp_auth_failures = 0; 5738 if (sp->hisauth.proto != 0) 5739 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 5740 else 5741 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 5742 5743 sppp_lock_exit(sp); 5744 } 5745 break; 5746 case SPPPGETLCPCFG: 5747 { 5748 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5749 sppp_lock_enter(sp); 5750 lcpp->lcp_timeout = sp->lcp.timeout; 5751 sppp_lock_exit(sp); 5752 } 5753 break; 5754 case SPPPSETLCPCFG: 5755 { 5756 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5757 sppp_lock_enter(sp); 5758 sp->lcp.timeout = lcpp->lcp_timeout; 5759 sppp_lock_exit(sp); 5760 } 5761 break; 5762 case SPPPGETSTATUS: 5763 { 5764 struct spppstatus *status = (struct spppstatus *)data; 5765 sppp_lock_enter(sp); 5766 status->phase = sp->pp_phase; 5767 sppp_lock_exit(sp); 5768 } 5769 break; 5770 case SPPPGETSTATUSNCP: 5771 { 5772 struct spppstatusncp *status = (struct spppstatusncp *)data; 5773 sppp_lock_enter(sp); 5774 status->phase = sp->pp_phase; 5775 sppp_lock_exit(sp); 5776 status->ncpup = sppp_ncp_check(sp); 5777 } 5778 break; 5779 case SPPPGETIDLETO: 5780 { 5781 struct spppidletimeout *to = (struct spppidletimeout *)data; 5782 sppp_lock_enter(sp); 5783 to->idle_seconds = sp->pp_idle_timeout; 5784 sppp_lock_exit(sp); 5785 } 5786 break; 5787 case SPPPSETIDLETO: 5788 { 5789 struct spppidletimeout *to = (struct spppidletimeout *)data; 5790 sppp_lock_enter(sp); 5791 sp->pp_idle_timeout = to->idle_seconds; 5792 sppp_lock_exit(sp); 5793 } 5794 break; 5795 case SPPPSETAUTHFAILURE: 5796 { 5797 struct spppauthfailuresettings *afsettings = (struct spppauthfailuresettings *)data; 5798 sppp_lock_enter(sp); 5799 sp->pp_max_auth_fail = afsettings->max_failures; 5800 sp->pp_auth_failures = 0; 5801 sppp_lock_exit(sp); 5802 } 5803 break; 5804 case SPPPGETAUTHFAILURES: 5805 { 5806 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5807 sppp_lock_enter(sp); 5808 stats->auth_failures = sp->pp_auth_failures; 5809 stats->max_failures = sp->pp_max_auth_fail; 5810 sppp_lock_exit(sp); 5811 } 5812 break; 5813 case SPPPSETDNSOPTS: 5814 { 5815 struct spppdnssettings *req = (struct spppdnssettings *)data; 5816 sppp_lock_enter(sp); 5817 sp->query_dns = req->query_dns & 3; 5818 sppp_lock_exit(sp); 5819 } 5820 break; 5821 case SPPPGETDNSOPTS: 5822 { 5823 struct spppdnssettings *req = (struct spppdnssettings *)data; 5824 sppp_lock_enter(sp); 5825 req->query_dns = sp->query_dns; 5826 sppp_lock_exit(sp); 5827 } 5828 break; 5829 case SPPPGETDNSADDRS: 5830 { 5831 struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data; 5832 sppp_lock_enter(sp); 5833 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5834 sppp_lock_exit(sp); 5835 } 5836 break; 5837 case SPPPGETKEEPALIVE: 5838 { 5839 struct spppkeepalivesettings *settings = 5840 (struct spppkeepalivesettings*)data; 5841 sppp_lock_enter(sp); 5842 settings->maxalive = sp->pp_maxalive; 5843 settings->max_noreceive = sp->pp_max_noreceive; 5844 sppp_lock_exit(sp); 5845 } 5846 break; 5847 case SPPPSETKEEPALIVE: 5848 { 5849 struct spppkeepalivesettings *settings = 5850 (struct spppkeepalivesettings*)data; 5851 sppp_lock_enter(sp); 5852 sp->pp_maxalive = settings->maxalive; 5853 sp->pp_max_noreceive = settings->max_noreceive; 5854 sppp_lock_exit(sp); 5855 } 5856 break; 5857 #if defined(COMPAT_50) || defined(MODULAR) 5858 case __SPPPGETIDLETO50: 5859 { 5860 struct spppidletimeout50 *to = (struct spppidletimeout50 *)data; 5861 sppp_lock_enter(sp); 5862 to->idle_seconds = (uint32_t)sp->pp_idle_timeout; 5863 sppp_lock_exit(sp); 5864 } 5865 break; 5866 case __SPPPSETIDLETO50: 5867 { 5868 struct spppidletimeout50 *to = (struct spppidletimeout50 *)data; 5869 sppp_lock_enter(sp); 5870 sp->pp_idle_timeout = (time_t)to->idle_seconds; 5871 sppp_lock_exit(sp); 5872 } 5873 break; 5874 case __SPPPGETKEEPALIVE50: 5875 { 5876 struct spppkeepalivesettings50 *settings = 5877 (struct spppkeepalivesettings50*)data; 5878 sppp_lock_enter(sp); 5879 settings->maxalive = sp->pp_maxalive; 5880 settings->max_noreceive = (uint32_t)sp->pp_max_noreceive; 5881 sppp_lock_exit(sp); 5882 } 5883 break; 5884 case __SPPPSETKEEPALIVE50: 5885 { 5886 struct spppkeepalivesettings50 *settings = 5887 (struct spppkeepalivesettings50*)data; 5888 sppp_lock_enter(sp); 5889 sp->pp_maxalive = settings->maxalive; 5890 sp->pp_max_noreceive = (time_t)settings->max_noreceive; 5891 sppp_lock_exit(sp); 5892 } 5893 break; 5894 #endif /* COMPAT_50 || MODULAR */ 5895 default: 5896 return (EINVAL); 5897 } 5898 5899 return (0); 5900 } 5901 5902 static void 5903 sppp_phase_network(struct sppp *sp) 5904 { 5905 STDDCL; 5906 int i; 5907 uint32_t mask; 5908 5909 KASSERT(sppp_locked(sp)); 5910 5911 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 5912 5913 /* Notify NCPs now. */ 5914 for (i = 0; i < IDX_COUNT; i++) 5915 if ((cps[i])->flags & CP_NCP) 5916 (cps[i])->Open(sp); 5917 5918 /* Send Up events to all NCPs. */ 5919 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5920 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) { 5921 (cps[i])->Up(sp); 5922 } 5923 5924 /* if no NCP is starting, all this was in vain, close down */ 5925 sppp_lcp_check_and_close(sp); 5926 } 5927 5928 5929 static const char * 5930 sppp_cp_type_name(u_char type) 5931 { 5932 static char buf[12]; 5933 switch (type) { 5934 case CONF_REQ: return "conf-req"; 5935 case CONF_ACK: return "conf-ack"; 5936 case CONF_NAK: return "conf-nak"; 5937 case CONF_REJ: return "conf-rej"; 5938 case TERM_REQ: return "term-req"; 5939 case TERM_ACK: return "term-ack"; 5940 case CODE_REJ: return "code-rej"; 5941 case PROTO_REJ: return "proto-rej"; 5942 case ECHO_REQ: return "echo-req"; 5943 case ECHO_REPLY: return "echo-reply"; 5944 case DISC_REQ: return "discard-req"; 5945 } 5946 snprintf(buf, sizeof(buf), "0x%x", type); 5947 return buf; 5948 } 5949 5950 static const char * 5951 sppp_auth_type_name(u_short proto, u_char type) 5952 { 5953 static char buf[32]; 5954 const char *name; 5955 5956 switch (proto) { 5957 case PPP_CHAP: 5958 switch (type) { 5959 case CHAP_CHALLENGE: return "challenge"; 5960 case CHAP_RESPONSE: return "response"; 5961 case CHAP_SUCCESS: return "success"; 5962 case CHAP_FAILURE: return "failure"; 5963 default: name = "chap"; break; 5964 } 5965 break; 5966 5967 case PPP_PAP: 5968 switch (type) { 5969 case PAP_REQ: return "req"; 5970 case PAP_ACK: return "ack"; 5971 case PAP_NAK: return "nak"; 5972 default: name = "pap"; break; 5973 } 5974 break; 5975 5976 default: 5977 name = "bad"; 5978 break; 5979 } 5980 5981 snprintf(buf, sizeof(buf), "%s(%#x) %#x", name, proto, type); 5982 return buf; 5983 } 5984 5985 static const char * 5986 sppp_lcp_opt_name(u_char opt) 5987 { 5988 static char buf[12]; 5989 switch (opt) { 5990 case LCP_OPT_MRU: return "mru"; 5991 case LCP_OPT_ASYNC_MAP: return "async-map"; 5992 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 5993 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 5994 case LCP_OPT_MAGIC: return "magic"; 5995 case LCP_OPT_PROTO_COMP: return "proto-comp"; 5996 case LCP_OPT_ADDR_COMP: return "addr-comp"; 5997 } 5998 snprintf(buf, sizeof(buf), "0x%x", opt); 5999 return buf; 6000 } 6001 6002 static const char * 6003 sppp_ipcp_opt_name(u_char opt) 6004 { 6005 static char buf[12]; 6006 switch (opt) { 6007 case IPCP_OPT_ADDRESSES: return "addresses"; 6008 case IPCP_OPT_COMPRESSION: return "compression"; 6009 case IPCP_OPT_ADDRESS: return "address"; 6010 } 6011 snprintf(buf, sizeof(buf), "0x%x", opt); 6012 return buf; 6013 } 6014 6015 #ifdef INET6 6016 static const char * 6017 sppp_ipv6cp_opt_name(u_char opt) 6018 { 6019 static char buf[12]; 6020 switch (opt) { 6021 case IPV6CP_OPT_IFID: return "ifid"; 6022 case IPV6CP_OPT_COMPRESSION: return "compression"; 6023 } 6024 snprintf(buf, sizeof(buf), "0x%x", opt); 6025 return buf; 6026 } 6027 #endif 6028 6029 static const char * 6030 sppp_state_name(int state) 6031 { 6032 switch (state) { 6033 case STATE_INITIAL: return "initial"; 6034 case STATE_STARTING: return "starting"; 6035 case STATE_CLOSED: return "closed"; 6036 case STATE_STOPPED: return "stopped"; 6037 case STATE_CLOSING: return "closing"; 6038 case STATE_STOPPING: return "stopping"; 6039 case STATE_REQ_SENT: return "req-sent"; 6040 case STATE_ACK_RCVD: return "ack-rcvd"; 6041 case STATE_ACK_SENT: return "ack-sent"; 6042 case STATE_OPENED: return "opened"; 6043 } 6044 return "illegal"; 6045 } 6046 6047 static const char * 6048 sppp_phase_name(int phase) 6049 { 6050 switch (phase) { 6051 case SPPP_PHASE_DEAD: return "dead"; 6052 case SPPP_PHASE_ESTABLISH: return "establish"; 6053 case SPPP_PHASE_TERMINATE: return "terminate"; 6054 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 6055 case SPPP_PHASE_NETWORK: return "network"; 6056 } 6057 return "illegal"; 6058 } 6059 6060 static const char * 6061 sppp_proto_name(u_short proto) 6062 { 6063 static char buf[12]; 6064 switch (proto) { 6065 case PPP_LCP: return "lcp"; 6066 case PPP_IPCP: return "ipcp"; 6067 case PPP_PAP: return "pap"; 6068 case PPP_CHAP: return "chap"; 6069 case PPP_IPV6CP: return "ipv6cp"; 6070 } 6071 snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto); 6072 return buf; 6073 } 6074 6075 static void 6076 sppp_print_bytes(const u_char *p, u_short len) 6077 { 6078 addlog(" %02x", *p++); 6079 while (--len > 0) 6080 addlog("-%02x", *p++); 6081 } 6082 6083 static void 6084 sppp_print_string(const char *p, u_short len) 6085 { 6086 u_char c; 6087 6088 while (len-- > 0) { 6089 c = *p++; 6090 /* 6091 * Print only ASCII chars directly. RFC 1994 recommends 6092 * using only them, but we don't rely on it. */ 6093 if (c < ' ' || c > '~') 6094 addlog("\\x%x", c); 6095 else 6096 addlog("%c", c); 6097 } 6098 } 6099 6100 static const char * 6101 sppp_dotted_quad(uint32_t addr) 6102 { 6103 static char s[16]; 6104 snprintf(s, sizeof(s), "%d.%d.%d.%d", 6105 (int)((addr >> 24) & 0xff), 6106 (int)((addr >> 16) & 0xff), 6107 (int)((addr >> 8) & 0xff), 6108 (int)(addr & 0xff)); 6109 return s; 6110 } 6111 6112 /* a dummy, used to drop uninteresting events */ 6113 static void 6114 sppp_null(struct sppp *unused) 6115 { 6116 /* do just nothing */ 6117 } 6118 /* 6119 * This file is large. Tell emacs to highlight it nevertheless. 6120 * 6121 * Local Variables: 6122 * hilit-auto-highlight-maxout: 120000 6123 * End: 6124 */ 6125
Indexes created Tue Oct 14 21:09:58 GMT 2025