if_spppsubr.c revision 1.146.2.4
1 /* $NetBSD: if_spppsubr.c,v 1.146.2.4 2017/04/26 02:53:29 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 1.146.2.4 2017/04/26 02:53:29 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 size_t pktlen; 720 721 s = splnet(); 722 723 sppp_lock_enter(sp); 724 sp->pp_last_activity = time_uptime; 725 726 if ((ifp->if_flags & IFF_UP) == 0 || 727 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 728 sppp_lock_exit(sp); 729 m_freem(m); 730 splx(s); 731 return (ENETDOWN); 732 } 733 734 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 735 /* 736 * Interface is not yet running, but auto-dial. Need 737 * to start LCP for it. 738 */ 739 ifp->if_flags |= IFF_RUNNING; 740 splx(s); 741 lcp.Open(sp); 742 s = splnet(); 743 } 744 745 /* 746 * If the queueing discipline needs packet classification, 747 * do it before prepending link headers. 748 */ 749 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family); 750 751 #ifdef INET 752 if (dst->sa_family == AF_INET) { 753 struct ip *ip = NULL; 754 #ifndef SPPPSUBR_MPSAFE 755 struct tcphdr *th = NULL; 756 #endif 757 758 if (m->m_len >= sizeof(struct ip)) { 759 ip = mtod(m, struct ip *); 760 #ifndef SPPPSUBR_MPSAFE 761 if (ip->ip_p == IPPROTO_TCP && 762 m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) + 763 sizeof(struct tcphdr)) { 764 th = (struct tcphdr *) 765 ((char *)ip + (ip->ip_hl << 2)); 766 } 767 #endif 768 } else 769 ip = NULL; 770 771 /* 772 * When using dynamic local IP address assignment by using 773 * 0.0.0.0 as a local address, the first TCP session will 774 * not connect because the local TCP checksum is computed 775 * using 0.0.0.0 which will later become our real IP address 776 * so the TCP checksum computed at the remote end will 777 * become invalid. So we 778 * - don't let packets with src ip addr 0 thru 779 * - we flag TCP packets with src ip 0 as an error 780 */ 781 if (ip && ip->ip_src.s_addr == INADDR_ANY) { 782 uint8_t proto = ip->ip_p; 783 784 sppp_lock_exit(sp); 785 m_freem(m); 786 splx(s); 787 if (proto == IPPROTO_TCP) 788 return (EADDRNOTAVAIL); 789 else 790 return (0); 791 } 792 793 #ifndef SPPPSUBR_MPSAFE 794 /* 795 * Put low delay, telnet, rlogin and ftp control packets 796 * in front of the queue. 797 */ 798 if (!IF_QFULL(&sp->pp_fastq) && 799 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || 800 (th && (INTERACTIVE(ntohs(th->th_sport)) || 801 INTERACTIVE(ntohs(th->th_dport)))))) 802 ifq = &sp->pp_fastq; 803 #endif /* !SPPPSUBR_MPSAFE */ 804 } 805 #endif 806 807 #ifdef INET6 808 if (dst->sa_family == AF_INET6) { 809 /* XXX do something tricky here? */ 810 } 811 #endif 812 813 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 814 /* 815 * Prepend general data packet PPP header. For now, IP only. 816 */ 817 M_PREPEND(m, PPP_HEADER_LEN, M_DONTWAIT); 818 if (! m) { 819 if (ifp->if_flags & IFF_DEBUG) 820 log(LOG_DEBUG, "%s: no memory for transmit header\n", 821 ifp->if_xname); 822 ++ifp->if_oerrors; 823 sppp_lock_exit(sp); 824 splx(s); 825 return (ENOBUFS); 826 } 827 /* 828 * May want to check size of packet 829 * (albeit due to the implementation it's always enough) 830 */ 831 h = mtod(m, struct ppp_header *); 832 if (sp->pp_flags & PP_CISCO) { 833 h->address = CISCO_UNICAST; /* unicast address */ 834 h->control = 0; 835 } else { 836 h->address = PPP_ALLSTATIONS; /* broadcast address */ 837 h->control = PPP_UI; /* Unnumbered Info */ 838 } 839 } 840 841 switch (dst->sa_family) { 842 #ifdef INET 843 case AF_INET: /* Internet Protocol */ 844 if (sp->pp_flags & PP_CISCO) 845 protocol = htons(ETHERTYPE_IP); 846 else { 847 /* 848 * Don't choke with an ENETDOWN early. It's 849 * possible that we just started dialing out, 850 * so don't drop the packet immediately. If 851 * we notice that we run out of buffer space 852 * below, we will however remember that we are 853 * not ready to carry IP packets, and return 854 * ENETDOWN, as opposed to ENOBUFS. 855 */ 856 protocol = htons(PPP_IP); 857 if (sp->state[IDX_IPCP] != STATE_OPENED) 858 error = ENETDOWN; 859 } 860 break; 861 #endif 862 #ifdef INET6 863 case AF_INET6: /* Internet Protocol version 6 */ 864 if (sp->pp_flags & PP_CISCO) 865 protocol = htons(ETHERTYPE_IPV6); 866 else { 867 /* 868 * Don't choke with an ENETDOWN early. It's 869 * possible that we just started dialing out, 870 * so don't drop the packet immediately. If 871 * we notice that we run out of buffer space 872 * below, we will however remember that we are 873 * not ready to carry IP packets, and return 874 * ENETDOWN, as opposed to ENOBUFS. 875 */ 876 protocol = htons(PPP_IPV6); 877 if (sp->state[IDX_IPV6CP] != STATE_OPENED) 878 error = ENETDOWN; 879 } 880 break; 881 #endif 882 default: 883 m_freem(m); 884 ++ifp->if_oerrors; 885 sppp_lock_exit(sp); 886 splx(s); 887 return (EAFNOSUPPORT); 888 } 889 890 if (sp->pp_flags & PP_NOFRAMING) { 891 M_PREPEND(m, 2, M_DONTWAIT); 892 if (m == NULL) { 893 if (ifp->if_flags & IFF_DEBUG) 894 log(LOG_DEBUG, "%s: no memory for transmit header\n", 895 ifp->if_xname); 896 ++ifp->if_oerrors; 897 sppp_lock_exit(sp); 898 splx(s); 899 return (ENOBUFS); 900 } 901 *mtod(m, uint16_t *) = protocol; 902 } else { 903 h->protocol = protocol; 904 } 905 906 pktlen = m->m_pkthdr.len; 907 #ifdef SPPPSUBR_MPSAFE 908 error = if_transmit_lock(ifp, m); 909 if (error == 0) 910 ifp->if_obytes += pktlen + sp->pp_framebytes; 911 #else /* !SPPPSUBR_MPSAFE */ 912 error = ifq_enqueue2(ifp, ifq, m); 913 914 if (error == 0) { 915 /* 916 * Count output packets and bytes. 917 * The packet length includes header + additional hardware 918 * framing according to RFC 1333. 919 */ 920 if (!(ifp->if_flags & IFF_OACTIVE)) { 921 sppp_lock_exit(sp); 922 if_start_lock(ifp); 923 sppp_lock_enter(sp); 924 } 925 ifp->if_obytes += pktlen + sp->pp_framebytes; 926 } 927 #endif /* !SPPPSUBR_MPSAFE */ 928 sppp_lock_exit(sp); 929 splx(s); 930 return error; 931 } 932 933 static int 934 sppp_mediachange(struct ifnet *ifp) 935 { 936 937 return (0); 938 } 939 940 static void 941 sppp_mediastatus(struct ifnet *ifp, struct ifmediareq *imr) 942 { 943 struct sppp *sp = (struct sppp *)ifp; 944 KASSERT(!sppp_locked(sp)); 945 946 sppp_lock_enter(sp); 947 switch (ifp->if_link_state) { 948 case LINK_STATE_UP: 949 imr->ifm_status = IFM_AVALID | IFM_ACTIVE; 950 break; 951 case LINK_STATE_DOWN: 952 imr->ifm_status = IFM_AVALID; 953 break; 954 default: 955 /* Should be impossible as we set link state down in attach. */ 956 imr->ifm_status = 0; 957 break; 958 } 959 sppp_lock_exit(sp); 960 } 961 962 void 963 sppp_attach(struct ifnet *ifp) 964 { 965 struct sppp *sp = (struct sppp *) ifp; 966 967 /* Initialize keepalive handler. */ 968 if (! spppq) { 969 callout_init(&keepalive_ch, 0); 970 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 971 } 972 973 if (! spppq_lock) 974 spppq_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_SOFTNET); 975 976 /* Insert new entry into the keepalive list. */ 977 sp->pp_next = spppq; 978 spppq = sp; 979 980 sp->pp_if.if_type = IFT_PPP; 981 sp->pp_if.if_output = sppp_output; 982 sp->pp_fastq.ifq_maxlen = 32; 983 sp->pp_cpq.ifq_maxlen = 20; 984 sp->pp_loopcnt = 0; 985 sp->pp_alivecnt = 0; 986 sp->pp_last_activity = 0; 987 sp->pp_last_receive = 0; 988 sp->pp_maxalive = DEFAULT_MAXALIVECNT; 989 sp->pp_max_noreceive = DEFAULT_NORECV_TIME; 990 sp->pp_idle_timeout = 0; 991 memset(&sp->pp_seq[0], 0, sizeof(sp->pp_seq)); 992 memset(&sp->pp_rseq[0], 0, sizeof(sp->pp_rseq)); 993 sp->pp_auth_failures = 0; 994 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 995 sp->pp_phase = SPPP_PHASE_DEAD; 996 sp->pp_up = lcp.Up; 997 sp->pp_down = lcp.Down; 998 sp->pp_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_SOFTNET); 999 1000 if_alloc_sadl(ifp); 1001 1002 /* Lets not beat about the bush, we know we're down. */ 1003 ifp->if_link_state = LINK_STATE_DOWN; 1004 /* There is no media for PPP, but it's needed to report link status. */ 1005 ifmedia_init(&sp->pp_im, 0, sppp_mediachange, sppp_mediastatus); 1006 1007 memset(&sp->myauth, 0, sizeof sp->myauth); 1008 memset(&sp->hisauth, 0, sizeof sp->hisauth); 1009 sppp_lcp_init(sp); 1010 sppp_ipcp_init(sp); 1011 sppp_ipv6cp_init(sp); 1012 sppp_pap_init(sp); 1013 sppp_chap_init(sp); 1014 } 1015 1016 void 1017 sppp_detach(struct ifnet *ifp) 1018 { 1019 struct sppp **q, *p, *sp = (struct sppp *) ifp; 1020 1021 sppp_lock_enter(sp); 1022 /* Remove the entry from the keepalive list. */ 1023 SPPPQ_LOCK(); 1024 for (q = &spppq; (p = *q); q = &p->pp_next) 1025 if (p == sp) { 1026 *q = p->pp_next; 1027 break; 1028 } 1029 1030 /* to avoid workqueue enqueued */ 1031 atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1); 1032 workqueue_destroy(sp->ipcp.update_addrs_wq); 1033 pcq_destroy(sp->ipcp.update_addrs_q); 1034 1035 /* Stop keepalive handler. */ 1036 if (! spppq) { 1037 callout_stop(&keepalive_ch); 1038 } 1039 SPPPQ_UNLOCK(); 1040 1041 callout_stop(&sp->ch[IDX_LCP]); 1042 callout_stop(&sp->ch[IDX_IPCP]); 1043 callout_stop(&sp->ch[IDX_PAP]); 1044 callout_stop(&sp->ch[IDX_CHAP]); 1045 #ifdef INET6 1046 callout_stop(&sp->ch[IDX_IPV6CP]); 1047 #endif 1048 callout_stop(&sp->pap_my_to_ch); 1049 1050 /* free authentication info */ 1051 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 1052 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 1053 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 1054 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 1055 1056 /* Safety - shouldn't be needed as there is no media to set. */ 1057 ifmedia_delete_instance(&sp->pp_im, IFM_INST_ANY); 1058 1059 sppp_lock_exit(sp); 1060 if (sp->pp_lock) 1061 mutex_obj_free(sp->pp_lock); 1062 1063 } 1064 1065 /* 1066 * Flush the interface output queue. 1067 */ 1068 void 1069 sppp_flush(struct ifnet *ifp) 1070 { 1071 struct sppp *sp = (struct sppp *) ifp; 1072 1073 IFQ_PURGE(&sp->pp_if.if_snd); 1074 IF_PURGE(&sp->pp_fastq); 1075 IF_PURGE(&sp->pp_cpq); 1076 } 1077 1078 /* 1079 * Check if the output queue is empty. 1080 */ 1081 int 1082 sppp_isempty(struct ifnet *ifp) 1083 { 1084 struct sppp *sp = (struct sppp *) ifp; 1085 int empty, s; 1086 1087 KASSERT(!sppp_locked(sp)); 1088 1089 s = splnet(); 1090 sppp_lock_enter(sp); 1091 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1092 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1093 sppp_lock_exit(sp); 1094 splx(s); 1095 return (empty); 1096 } 1097 1098 /* 1099 * Get next packet to send. 1100 */ 1101 struct mbuf * 1102 sppp_dequeue(struct ifnet *ifp) 1103 { 1104 struct sppp *sp = (struct sppp *) ifp; 1105 struct mbuf *m; 1106 int s; 1107 1108 s = splnet(); 1109 sppp_lock_enter(sp); 1110 /* 1111 * Process only the control protocol queue until we have at 1112 * least one NCP open. 1113 * 1114 * Do always serve all three queues in Cisco mode. 1115 */ 1116 IF_DEQUEUE(&sp->pp_cpq, m); 1117 if (m == NULL && 1118 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { 1119 IF_DEQUEUE(&sp->pp_fastq, m); 1120 if (m == NULL) 1121 IFQ_DEQUEUE(&sp->pp_if.if_snd, m); 1122 } 1123 sppp_lock_exit(sp); 1124 splx(s); 1125 return m; 1126 } 1127 1128 /* 1129 * Process an ioctl request. Called on low priority level. 1130 */ 1131 int 1132 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1133 { 1134 struct lwp *l = curlwp; /* XXX */ 1135 struct ifreq *ifr = (struct ifreq *) data; 1136 struct ifaddr *ifa = (struct ifaddr *) data; 1137 struct sppp *sp = (struct sppp *) ifp; 1138 int s, error=0, going_up, going_down, newmode; 1139 1140 s = splnet(); 1141 switch (cmd) { 1142 case SIOCINITIFADDR: 1143 ifa->ifa_rtrequest = p2p_rtrequest; 1144 break; 1145 1146 case SIOCSIFFLAGS: 1147 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1148 break; 1149 1150 sppp_lock_enter(sp); 1151 going_up = ifp->if_flags & IFF_UP && 1152 (ifp->if_flags & IFF_RUNNING) == 0; 1153 going_down = (ifp->if_flags & IFF_UP) == 0 && 1154 ifp->if_flags & IFF_RUNNING; 1155 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1156 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1157 /* sanity */ 1158 newmode = IFF_PASSIVE; 1159 ifp->if_flags &= ~IFF_AUTO; 1160 } 1161 1162 if (going_up || going_down) { 1163 lcp.Close(sp); 1164 } 1165 if (going_up && newmode == 0) { 1166 /* neither auto-dial nor passive */ 1167 ifp->if_flags |= IFF_RUNNING; 1168 if (!(sp->pp_flags & PP_CISCO)) 1169 lcp.Open(sp); 1170 } else if (going_down) { 1171 sppp_flush(ifp); 1172 ifp->if_flags &= ~IFF_RUNNING; 1173 } 1174 sppp_lock_exit(sp); 1175 break; 1176 1177 case SIOCSIFMTU: 1178 if (ifr->ifr_mtu < PPP_MINMRU || 1179 ifr->ifr_mtu > sp->lcp.their_mru) { 1180 error = EINVAL; 1181 break; 1182 } 1183 /*FALLTHROUGH*/ 1184 case SIOCGIFMTU: 1185 if ((error = ifioctl_common(ifp, cmd, data)) == ENETRESET) 1186 error = 0; 1187 break; 1188 case SIOCADDMULTI: 1189 case SIOCDELMULTI: 1190 break; 1191 1192 case SPPPSETAUTHCFG: 1193 case SPPPSETLCPCFG: 1194 case SPPPSETIDLETO: 1195 case SPPPSETAUTHFAILURE: 1196 case SPPPSETDNSOPTS: 1197 case SPPPSETKEEPALIVE: 1198 #if defined(COMPAT_50) || defined(MODULAR) 1199 case __SPPPSETIDLETO50: 1200 case __SPPPSETKEEPALIVE50: 1201 #endif /* COMPAT_50 || MODULAR */ 1202 error = kauth_authorize_network(l->l_cred, 1203 KAUTH_NETWORK_INTERFACE, 1204 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd, 1205 NULL); 1206 if (error) 1207 break; 1208 error = sppp_params(sp, cmd, data); 1209 break; 1210 1211 case SPPPGETAUTHCFG: 1212 case SPPPGETLCPCFG: 1213 case SPPPGETAUTHFAILURES: 1214 error = kauth_authorize_network(l->l_cred, 1215 KAUTH_NETWORK_INTERFACE, 1216 KAUTH_REQ_NETWORK_INTERFACE_GETPRIV, ifp, (void *)cmd, 1217 NULL); 1218 if (error) 1219 break; 1220 error = sppp_params(sp, cmd, data); 1221 break; 1222 1223 case SPPPGETSTATUS: 1224 case SPPPGETSTATUSNCP: 1225 case SPPPGETIDLETO: 1226 case SPPPGETDNSOPTS: 1227 case SPPPGETDNSADDRS: 1228 case SPPPGETKEEPALIVE: 1229 #if defined(COMPAT_50) || defined(MODULAR) 1230 case __SPPPGETIDLETO50: 1231 case __SPPPGETKEEPALIVE50: 1232 #endif /* COMPAT_50 || MODULAR */ 1233 error = sppp_params(sp, cmd, data); 1234 break; 1235 1236 case SIOCGIFMEDIA: 1237 error = ifmedia_ioctl(ifp, ifr, &sp->pp_im, cmd); 1238 break; 1239 1240 default: 1241 error = ifioctl_common(ifp, cmd, data); 1242 break; 1243 } 1244 splx(s); 1245 return (error); 1246 } 1247 1248 1249 /* 1250 * Cisco framing implementation. 1251 */ 1252 1253 /* 1254 * Handle incoming Cisco keepalive protocol packets. 1255 */ 1256 static void 1257 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1258 { 1259 STDDCL; 1260 struct cisco_packet *h; 1261 #ifdef INET 1262 uint32_t me, mymask = 0; /* XXX: GCC */ 1263 #endif 1264 1265 KASSERT(!sppp_locked(sp)); 1266 1267 sppp_lock_enter(sp); 1268 1269 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1270 if (debug) 1271 log(LOG_DEBUG, 1272 "%s: cisco invalid packet length: %d bytes\n", 1273 ifp->if_xname, m->m_pkthdr.len); 1274 sppp_lock_exit(sp); 1275 return; 1276 } 1277 h = mtod(m, struct cisco_packet *); 1278 if (debug) 1279 log(LOG_DEBUG, 1280 "%s: cisco input: %d bytes " 1281 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1282 ifp->if_xname, m->m_pkthdr.len, 1283 ntohl(h->type), h->par1, h->par2, (u_int)h->rel, 1284 (u_int)h->time0, (u_int)h->time1); 1285 switch (ntohl(h->type)) { 1286 default: 1287 if (debug) 1288 addlog("%s: cisco unknown packet type: 0x%x\n", 1289 ifp->if_xname, ntohl(h->type)); 1290 break; 1291 case CISCO_ADDR_REPLY: 1292 /* Reply on address request, ignore */ 1293 break; 1294 case CISCO_KEEPALIVE_REQ: 1295 sp->pp_alivecnt = 0; 1296 sp->pp_rseq[IDX_LCP] = ntohl(h->par1); 1297 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 1298 /* Local and remote sequence numbers are equal. 1299 * Probably, the line is in loopback mode. */ 1300 if (sp->pp_loopcnt >= LOOPALIVECNT) { 1301 printf ("%s: loopback\n", 1302 ifp->if_xname); 1303 sp->pp_loopcnt = 0; 1304 if (ifp->if_flags & IFF_UP) { 1305 sppp_lock_exit(sp); 1306 if_down(ifp); 1307 sppp_lock_enter(sp); 1308 IF_PURGE(&sp->pp_cpq); 1309 } 1310 } 1311 ++sp->pp_loopcnt; 1312 1313 /* Generate new local sequence number */ 1314 sp->pp_seq[IDX_LCP] = cprng_fast32(); 1315 break; 1316 } 1317 sp->pp_loopcnt = 0; 1318 if (! (ifp->if_flags & IFF_UP) && 1319 (ifp->if_flags & IFF_RUNNING)) { 1320 sppp_lock_exit(sp); 1321 if_up(ifp); 1322 sppp_lock_enter(sp); 1323 } 1324 break; 1325 case CISCO_ADDR_REQ: 1326 #ifdef INET 1327 sppp_lock_exit(sp); 1328 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1329 if (me != 0L) 1330 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1331 #endif 1332 sppp_lock_enter(sp); 1333 break; 1334 } 1335 sppp_lock_exit(sp); 1336 } 1337 1338 /* 1339 * Send Cisco keepalive packet. 1340 */ 1341 static void 1342 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1343 { 1344 STDDCL; 1345 struct ppp_header *h; 1346 struct cisco_packet *ch; 1347 struct mbuf *m; 1348 uint32_t t; 1349 1350 KASSERT(sppp_locked(sp)); 1351 1352 t = time_uptime * 1000; 1353 MGETHDR(m, M_DONTWAIT, MT_DATA); 1354 if (! m) 1355 return; 1356 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1357 m_reset_rcvif(m); 1358 1359 h = mtod(m, struct ppp_header *); 1360 h->address = CISCO_MULTICAST; 1361 h->control = 0; 1362 h->protocol = htons(CISCO_KEEPALIVE); 1363 1364 ch = (struct cisco_packet *)(h + 1); 1365 ch->type = htonl(type); 1366 ch->par1 = htonl(par1); 1367 ch->par2 = htonl(par2); 1368 ch->rel = -1; 1369 1370 ch->time0 = htons((u_short)(t >> 16)); 1371 ch->time1 = htons((u_short) t); 1372 1373 if (debug) 1374 log(LOG_DEBUG, 1375 "%s: cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1376 ifp->if_xname, ntohl(ch->type), ch->par1, 1377 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1378 (u_int)ch->time1); 1379 1380 if (IF_QFULL(&sp->pp_cpq)) { 1381 IF_DROP(&sp->pp_fastq); 1382 IF_DROP(&ifp->if_snd); 1383 m_freem(m); 1384 ++ifp->if_oerrors; 1385 return; 1386 } 1387 1388 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1389 IF_ENQUEUE(&sp->pp_cpq, m); 1390 1391 if (! (ifp->if_flags & IFF_OACTIVE)) { 1392 sppp_lock_exit(sp); 1393 if_start_lock(ifp); 1394 sppp_lock_enter(sp); 1395 } 1396 } 1397 1398 /* 1399 * PPP protocol implementation. 1400 */ 1401 1402 /* 1403 * Send PPP control protocol packet. 1404 */ 1405 static void 1406 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1407 u_char ident, u_short len, void *data) 1408 { 1409 STDDCL; 1410 struct lcp_header *lh; 1411 struct mbuf *m; 1412 size_t pkthdrlen; 1413 1414 KASSERT(sppp_locked(sp)); 1415 1416 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1417 1418 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1419 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1420 MGETHDR(m, M_DONTWAIT, MT_DATA); 1421 if (! m) 1422 return; 1423 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1424 m_reset_rcvif(m); 1425 1426 if (sp->pp_flags & PP_NOFRAMING) { 1427 *mtod(m, uint16_t *) = htons(proto); 1428 lh = (struct lcp_header *)(mtod(m, uint8_t *) + 2); 1429 } else { 1430 struct ppp_header *h; 1431 h = mtod(m, struct ppp_header *); 1432 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1433 h->control = PPP_UI; /* Unnumbered Info */ 1434 h->protocol = htons(proto); /* Link Control Protocol */ 1435 lh = (struct lcp_header *)(h + 1); 1436 } 1437 lh->type = type; 1438 lh->ident = ident; 1439 lh->len = htons(LCP_HEADER_LEN + len); 1440 if (len) 1441 memcpy(lh + 1, data, len); 1442 1443 if (debug) { 1444 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 1445 ifp->if_xname, 1446 sppp_proto_name(proto), 1447 sppp_cp_type_name(lh->type), lh->ident, ntohs(lh->len)); 1448 if (len) 1449 sppp_print_bytes((u_char *)(lh + 1), len); 1450 addlog(">\n"); 1451 } 1452 if (IF_QFULL(&sp->pp_cpq)) { 1453 IF_DROP(&sp->pp_fastq); 1454 IF_DROP(&ifp->if_snd); 1455 m_freem(m); 1456 ++ifp->if_oerrors; 1457 return; 1458 } 1459 1460 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1461 IF_ENQUEUE(&sp->pp_cpq, m); 1462 1463 if (! (ifp->if_flags & IFF_OACTIVE)) { 1464 sppp_lock_exit(sp); 1465 if_start_lock(ifp); 1466 sppp_lock_enter(sp); 1467 } 1468 } 1469 1470 /* 1471 * Handle incoming PPP control protocol packets. 1472 */ 1473 static void 1474 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1475 { 1476 STDDCL; 1477 struct lcp_header *h; 1478 int printlen, len = m->m_pkthdr.len; 1479 int rv; 1480 u_char *p; 1481 uint32_t u32; 1482 1483 KASSERT(!sppp_locked(sp)); 1484 if (len < 4) { 1485 if (debug) 1486 log(LOG_DEBUG, 1487 "%s: %s invalid packet length: %d bytes\n", 1488 ifp->if_xname, cp->name, len); 1489 return; 1490 } 1491 h = mtod(m, struct lcp_header *); 1492 if (debug) { 1493 printlen = ntohs(h->len); 1494 log(LOG_DEBUG, 1495 "%s: %s input(%s): <%s id=0x%x len=%d", 1496 ifp->if_xname, cp->name, 1497 sppp_state_name(sp->state[cp->protoidx]), 1498 sppp_cp_type_name(h->type), h->ident, printlen); 1499 if (len < printlen) 1500 printlen = len; 1501 if (printlen > 4) 1502 sppp_print_bytes((u_char *)(h + 1), printlen - 4); 1503 addlog(">\n"); 1504 } 1505 if (len > ntohs(h->len)) 1506 len = ntohs(h->len); 1507 p = (u_char *)(h + 1); 1508 switch (h->type) { 1509 case CONF_REQ: 1510 if (len < 4) { 1511 if (debug) 1512 addlog("%s: %s invalid conf-req length %d\n", 1513 ifp->if_xname, cp->name, 1514 len); 1515 sppp_lock_enter(sp); 1516 ++ifp->if_ierrors; 1517 sppp_lock_exit(sp); 1518 break; 1519 } 1520 /* handle states where RCR doesn't get a SCA/SCN */ 1521 sppp_lock_enter(sp); 1522 switch (sp->state[cp->protoidx]) { 1523 case STATE_CLOSING: 1524 case STATE_STOPPING: 1525 sppp_lock_exit(sp); 1526 return; 1527 case STATE_CLOSED: 1528 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1529 0, 0); 1530 sppp_lock_exit(sp); 1531 return; 1532 } 1533 rv = (cp->RCR)(sp, h, len); 1534 if (rv < 0) { 1535 /* fatal error, shut down */ 1536 (cp->tld)(sp); 1537 sppp_lcp_tlf(sp); 1538 sppp_lock_exit(sp); 1539 return; 1540 } 1541 switch (sp->state[cp->protoidx]) { 1542 case STATE_OPENED: 1543 (cp->tld)(sp); 1544 (cp->scr)(sp); 1545 /* fall through... */ 1546 case STATE_ACK_SENT: 1547 case STATE_REQ_SENT: 1548 sppp_cp_change_state(cp, sp, rv? 1549 STATE_ACK_SENT: STATE_REQ_SENT); 1550 break; 1551 case STATE_STOPPED: 1552 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1553 (cp->scr)(sp); 1554 sppp_cp_change_state(cp, sp, rv? 1555 STATE_ACK_SENT: STATE_REQ_SENT); 1556 break; 1557 case STATE_ACK_RCVD: 1558 if (rv) { 1559 sppp_cp_change_state(cp, sp, STATE_OPENED); 1560 if (debug) 1561 log(LOG_DEBUG, "%s: %s tlu\n", 1562 ifp->if_xname, 1563 cp->name); 1564 (cp->tlu)(sp); 1565 } else 1566 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1567 break; 1568 default: 1569 sppp_lock_enter(sp); 1570 printf("%s: %s illegal %s in state %s\n", 1571 ifp->if_xname, cp->name, 1572 sppp_cp_type_name(h->type), 1573 sppp_state_name(sp->state[cp->protoidx])); 1574 ++ifp->if_ierrors; 1575 } 1576 sppp_lock_exit(sp); 1577 break; 1578 case CONF_ACK: 1579 sppp_lock_enter(sp); 1580 if (h->ident != sp->confid[cp->protoidx]) { 1581 if (debug) 1582 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1583 ifp->if_xname, cp->name, 1584 h->ident, sp->confid[cp->protoidx]); 1585 ++ifp->if_ierrors; 1586 sppp_lock_exit(sp); 1587 break; 1588 } 1589 switch (sp->state[cp->protoidx]) { 1590 case STATE_CLOSED: 1591 case STATE_STOPPED: 1592 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1593 break; 1594 case STATE_CLOSING: 1595 case STATE_STOPPING: 1596 break; 1597 case STATE_REQ_SENT: 1598 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1599 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1600 break; 1601 case STATE_OPENED: 1602 (cp->tld)(sp); 1603 /* fall through */ 1604 case STATE_ACK_RCVD: 1605 (cp->scr)(sp); 1606 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1607 break; 1608 case STATE_ACK_SENT: 1609 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1610 sppp_cp_change_state(cp, sp, STATE_OPENED); 1611 if (debug) 1612 log(LOG_DEBUG, "%s: %s tlu\n", 1613 ifp->if_xname, cp->name); 1614 (cp->tlu)(sp); 1615 break; 1616 default: 1617 printf("%s: %s illegal %s in state %s\n", 1618 ifp->if_xname, cp->name, 1619 sppp_cp_type_name(h->type), 1620 sppp_state_name(sp->state[cp->protoidx])); 1621 ++ifp->if_ierrors; 1622 } 1623 sppp_lock_exit(sp); 1624 break; 1625 case CONF_NAK: 1626 case CONF_REJ: 1627 sppp_lock_enter(sp); 1628 if (h->ident != sp->confid[cp->protoidx]) { 1629 if (debug) 1630 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1631 ifp->if_xname, cp->name, 1632 h->ident, sp->confid[cp->protoidx]); 1633 ++ifp->if_ierrors; 1634 sppp_lock_exit(sp); 1635 break; 1636 } 1637 if (h->type == CONF_NAK) 1638 (cp->RCN_nak)(sp, h, len); 1639 else /* CONF_REJ */ 1640 (cp->RCN_rej)(sp, h, len); 1641 1642 switch (sp->state[cp->protoidx]) { 1643 case STATE_CLOSED: 1644 case STATE_STOPPED: 1645 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1646 break; 1647 case STATE_REQ_SENT: 1648 case STATE_ACK_SENT: 1649 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1650 (cp->scr)(sp); 1651 break; 1652 case STATE_OPENED: 1653 (cp->tld)(sp); 1654 /* fall through */ 1655 case STATE_ACK_RCVD: 1656 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1657 (cp->scr)(sp); 1658 break; 1659 case STATE_CLOSING: 1660 case STATE_STOPPING: 1661 break; 1662 default: 1663 printf("%s: %s illegal %s in state %s\n", 1664 ifp->if_xname, cp->name, 1665 sppp_cp_type_name(h->type), 1666 sppp_state_name(sp->state[cp->protoidx])); 1667 ++ifp->if_ierrors; 1668 } 1669 sppp_lock_exit(sp); 1670 break; 1671 1672 case TERM_REQ: 1673 sppp_lock_enter(sp); 1674 switch (sp->state[cp->protoidx]) { 1675 case STATE_ACK_RCVD: 1676 case STATE_ACK_SENT: 1677 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1678 /* fall through */ 1679 case STATE_CLOSED: 1680 case STATE_STOPPED: 1681 case STATE_CLOSING: 1682 case STATE_STOPPING: 1683 case STATE_REQ_SENT: 1684 sta: 1685 /* Send Terminate-Ack packet. */ 1686 if (debug) 1687 log(LOG_DEBUG, "%s: %s send terminate-ack\n", 1688 ifp->if_xname, cp->name); 1689 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1690 break; 1691 case STATE_OPENED: 1692 (cp->tld)(sp); 1693 sp->rst_counter[cp->protoidx] = 0; 1694 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1695 goto sta; 1696 default: 1697 printf("%s: %s illegal %s in state %s\n", 1698 ifp->if_xname, cp->name, 1699 sppp_cp_type_name(h->type), 1700 sppp_state_name(sp->state[cp->protoidx])); 1701 ++ifp->if_ierrors; 1702 } 1703 sppp_lock_exit(sp); 1704 break; 1705 case TERM_ACK: 1706 sppp_lock_enter(sp); 1707 switch (sp->state[cp->protoidx]) { 1708 case STATE_CLOSED: 1709 case STATE_STOPPED: 1710 case STATE_REQ_SENT: 1711 case STATE_ACK_SENT: 1712 break; 1713 case STATE_CLOSING: 1714 (cp->tlf)(sp); 1715 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1716 sppp_lcp_check_and_close(sp); 1717 break; 1718 case STATE_STOPPING: 1719 (cp->tlf)(sp); 1720 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1721 sppp_lcp_check_and_close(sp); 1722 break; 1723 case STATE_ACK_RCVD: 1724 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1725 break; 1726 case STATE_OPENED: 1727 (cp->tld)(sp); 1728 (cp->scr)(sp); 1729 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1730 break; 1731 default: 1732 printf("%s: %s illegal %s in state %s\n", 1733 ifp->if_xname, cp->name, 1734 sppp_cp_type_name(h->type), 1735 sppp_state_name(sp->state[cp->protoidx])); 1736 ++ifp->if_ierrors; 1737 } 1738 sppp_lock_exit(sp); 1739 break; 1740 case CODE_REJ: 1741 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1742 sppp_lock_enter(sp); 1743 log(LOG_INFO, 1744 "%s: %s: ignoring RXJ (%s) for code ?, " 1745 "danger will robinson\n", 1746 ifp->if_xname, cp->name, 1747 sppp_cp_type_name(h->type)); 1748 switch (sp->state[cp->protoidx]) { 1749 case STATE_CLOSED: 1750 case STATE_STOPPED: 1751 case STATE_REQ_SENT: 1752 case STATE_ACK_SENT: 1753 case STATE_CLOSING: 1754 case STATE_STOPPING: 1755 case STATE_OPENED: 1756 break; 1757 case STATE_ACK_RCVD: 1758 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1759 break; 1760 default: 1761 printf("%s: %s illegal %s in state %s\n", 1762 ifp->if_xname, cp->name, 1763 sppp_cp_type_name(h->type), 1764 sppp_state_name(sp->state[cp->protoidx])); 1765 ++ifp->if_ierrors; 1766 } 1767 sppp_lock_exit(sp); 1768 break; 1769 case PROTO_REJ: 1770 { 1771 int catastrophic; 1772 const struct cp *upper; 1773 int i; 1774 uint16_t proto; 1775 1776 catastrophic = 0; 1777 upper = NULL; 1778 proto = p[0] << 8 | p[1]; 1779 for (i = 0; i < IDX_COUNT; i++) { 1780 if (cps[i]->proto == proto) { 1781 upper = cps[i]; 1782 break; 1783 } 1784 } 1785 if (upper == NULL) 1786 catastrophic++; 1787 1788 sppp_lock_enter(sp); 1789 1790 if (debug) 1791 log(LOG_INFO, 1792 "%s: %s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1793 ifp->if_xname, cp->name, catastrophic ? '-' : '+', 1794 sppp_cp_type_name(h->type), proto, 1795 upper ? upper->name : "unknown", 1796 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1797 1798 /* 1799 * if we got RXJ+ against conf-req, the peer does not implement 1800 * this particular protocol type. terminate the protocol. 1801 */ 1802 if (upper && !catastrophic) { 1803 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1804 upper->Close(sp); 1805 sppp_lock_exit(sp); 1806 break; 1807 } 1808 } 1809 1810 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1811 switch (sp->state[cp->protoidx]) { 1812 case STATE_CLOSED: 1813 case STATE_STOPPED: 1814 case STATE_REQ_SENT: 1815 case STATE_ACK_SENT: 1816 case STATE_CLOSING: 1817 case STATE_STOPPING: 1818 case STATE_OPENED: 1819 break; 1820 case STATE_ACK_RCVD: 1821 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1822 break; 1823 default: 1824 printf("%s: %s illegal %s in state %s\n", 1825 ifp->if_xname, cp->name, 1826 sppp_cp_type_name(h->type), 1827 sppp_state_name(sp->state[cp->protoidx])); 1828 ++ifp->if_ierrors; 1829 } 1830 sppp_lock_exit(sp); 1831 break; 1832 } 1833 case DISC_REQ: 1834 if (cp->proto != PPP_LCP) 1835 goto illegal; 1836 /* Discard the packet. */ 1837 break; 1838 case ECHO_REQ: 1839 if (cp->proto != PPP_LCP) 1840 goto illegal; 1841 sppp_lock_enter(sp); 1842 if (sp->state[cp->protoidx] != STATE_OPENED) { 1843 if (debug) 1844 addlog("%s: lcp echo req but lcp closed\n", 1845 ifp->if_xname); 1846 ++ifp->if_ierrors; 1847 sppp_lock_exit(sp); 1848 break; 1849 } 1850 if (len < 8) { 1851 if (debug) 1852 addlog("%s: invalid lcp echo request " 1853 "packet length: %d bytes\n", 1854 ifp->if_xname, len); 1855 sppp_lock_exit(sp); 1856 break; 1857 } 1858 memcpy(&u32, h + 1, sizeof u32); 1859 if (ntohl(u32) == sp->lcp.magic) { 1860 /* Line loopback mode detected. */ 1861 printf("%s: loopback\n", ifp->if_xname); 1862 if_down(ifp); 1863 IF_PURGE(&sp->pp_cpq); 1864 1865 /* Shut down the PPP link. */ 1866 /* XXX */ 1867 lcp.Down(sp); 1868 lcp.Up(sp); 1869 sppp_lock_exit(sp); 1870 break; 1871 } 1872 u32 = htonl(sp->lcp.magic); 1873 memcpy(h + 1, &u32, sizeof u32); 1874 if (debug) 1875 addlog("%s: got lcp echo req, sending echo rep\n", 1876 ifp->if_xname); 1877 sppp_cp_send(sp, PPP_LCP, ECHO_REPLY, h->ident, len - 4, 1878 h + 1); 1879 sppp_lock_exit(sp); 1880 break; 1881 case ECHO_REPLY: 1882 if (cp->proto != PPP_LCP) 1883 goto illegal; 1884 sppp_lock_enter(sp); 1885 if (h->ident != sp->lcp.echoid) { 1886 ++ifp->if_ierrors; 1887 sppp_lock_exit(sp); 1888 break; 1889 } 1890 if (len < 8) { 1891 if (debug) 1892 addlog("%s: lcp invalid echo reply " 1893 "packet length: %d bytes\n", 1894 ifp->if_xname, len); 1895 sppp_lock_exit(sp); 1896 break; 1897 } 1898 if (debug) 1899 addlog("%s: lcp got echo rep\n", 1900 ifp->if_xname); 1901 memcpy(&u32, h + 1, sizeof u32); 1902 if (ntohl(u32) != sp->lcp.magic) 1903 sp->pp_alivecnt = 0; 1904 sppp_lock_exit(sp); 1905 break; 1906 default: 1907 /* Unknown packet type -- send Code-Reject packet. */ 1908 illegal: 1909 sppp_lock_enter(sp); 1910 if (debug) 1911 addlog("%s: %s send code-rej for 0x%x\n", 1912 ifp->if_xname, cp->name, h->type); 1913 sppp_cp_send(sp, cp->proto, CODE_REJ, 1914 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 1915 ++ifp->if_ierrors; 1916 sppp_lock_exit(sp); 1917 } 1918 } 1919 1920 1921 /* 1922 * The generic part of all Up/Down/Open/Close/TO event handlers. 1923 * Basically, the state transition handling in the automaton. 1924 */ 1925 static void 1926 sppp_up_event(const struct cp *cp, struct sppp *sp) 1927 { 1928 STDDCL; 1929 1930 KASSERT(sppp_locked(sp)); 1931 1932 if (debug) 1933 log(LOG_DEBUG, "%s: %s up(%s)\n", 1934 ifp->if_xname, cp->name, 1935 sppp_state_name(sp->state[cp->protoidx])); 1936 1937 switch (sp->state[cp->protoidx]) { 1938 case STATE_INITIAL: 1939 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1940 break; 1941 case STATE_STARTING: 1942 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1943 (cp->scr)(sp); 1944 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1945 break; 1946 default: 1947 printf("%s: %s illegal up in state %s\n", 1948 ifp->if_xname, cp->name, 1949 sppp_state_name(sp->state[cp->protoidx])); 1950 } 1951 } 1952 1953 static void 1954 sppp_down_event(const struct cp *cp, struct sppp *sp) 1955 { 1956 STDDCL; 1957 1958 KASSERT(sppp_locked(sp)); 1959 1960 if (debug) 1961 log(LOG_DEBUG, "%s: %s down(%s)\n", 1962 ifp->if_xname, cp->name, 1963 sppp_state_name(sp->state[cp->protoidx])); 1964 1965 switch (sp->state[cp->protoidx]) { 1966 case STATE_CLOSED: 1967 case STATE_CLOSING: 1968 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1969 break; 1970 case STATE_STOPPED: 1971 (cp->tls)(sp); 1972 /* fall through */ 1973 case STATE_STOPPING: 1974 case STATE_REQ_SENT: 1975 case STATE_ACK_RCVD: 1976 case STATE_ACK_SENT: 1977 sppp_cp_change_state(cp, sp, STATE_STARTING); 1978 break; 1979 case STATE_OPENED: 1980 (cp->tld)(sp); 1981 sppp_cp_change_state(cp, sp, STATE_STARTING); 1982 break; 1983 default: 1984 printf("%s: %s illegal down in state %s\n", 1985 ifp->if_xname, cp->name, 1986 sppp_state_name(sp->state[cp->protoidx])); 1987 } 1988 } 1989 1990 1991 static void 1992 sppp_open_event(const struct cp *cp, struct sppp *sp) 1993 { 1994 STDDCL; 1995 1996 KASSERT(sppp_locked(sp)); 1997 1998 if (debug) 1999 log(LOG_DEBUG, "%s: %s open(%s)\n", 2000 ifp->if_xname, cp->name, 2001 sppp_state_name(sp->state[cp->protoidx])); 2002 2003 switch (sp->state[cp->protoidx]) { 2004 case STATE_INITIAL: 2005 sppp_cp_change_state(cp, sp, STATE_STARTING); 2006 (cp->tls)(sp); 2007 break; 2008 case STATE_STARTING: 2009 break; 2010 case STATE_CLOSED: 2011 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 2012 (cp->scr)(sp); 2013 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2014 break; 2015 case STATE_STOPPED: 2016 case STATE_STOPPING: 2017 case STATE_REQ_SENT: 2018 case STATE_ACK_RCVD: 2019 case STATE_ACK_SENT: 2020 case STATE_OPENED: 2021 break; 2022 case STATE_CLOSING: 2023 sppp_cp_change_state(cp, sp, STATE_STOPPING); 2024 break; 2025 } 2026 } 2027 2028 2029 static void 2030 sppp_close_event(const struct cp *cp, struct sppp *sp) 2031 { 2032 STDDCL; 2033 2034 KASSERT(sppp_locked(sp)); 2035 2036 if (debug) 2037 log(LOG_DEBUG, "%s: %s close(%s)\n", 2038 ifp->if_xname, cp->name, 2039 sppp_state_name(sp->state[cp->protoidx])); 2040 2041 switch (sp->state[cp->protoidx]) { 2042 case STATE_INITIAL: 2043 case STATE_CLOSED: 2044 case STATE_CLOSING: 2045 break; 2046 case STATE_STARTING: 2047 sppp_cp_change_state(cp, sp, STATE_INITIAL); 2048 (cp->tlf)(sp); 2049 break; 2050 case STATE_STOPPED: 2051 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2052 break; 2053 case STATE_STOPPING: 2054 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2055 break; 2056 case STATE_OPENED: 2057 (cp->tld)(sp); 2058 /* fall through */ 2059 case STATE_REQ_SENT: 2060 case STATE_ACK_RCVD: 2061 case STATE_ACK_SENT: 2062 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 2063 sppp_cp_send(sp, cp->proto, TERM_REQ, 2064 ++sp->pp_seq[cp->protoidx], 0, 0); 2065 sppp_cp_change_state(cp, sp, STATE_CLOSING); 2066 break; 2067 } 2068 } 2069 2070 static void 2071 sppp_to_event(const struct cp *cp, struct sppp *sp) 2072 { 2073 STDDCL; 2074 int s; 2075 2076 KASSERT(sppp_locked(sp)); 2077 2078 s = splnet(); 2079 2080 if (debug) 2081 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 2082 ifp->if_xname, cp->name, 2083 sppp_state_name(sp->state[cp->protoidx]), 2084 sp->rst_counter[cp->protoidx]); 2085 2086 if (--sp->rst_counter[cp->protoidx] < 0) 2087 /* TO- event */ 2088 switch (sp->state[cp->protoidx]) { 2089 case STATE_CLOSING: 2090 (cp->tlf)(sp); 2091 sppp_cp_change_state(cp, sp, STATE_CLOSED); 2092 sppp_lcp_check_and_close(sp); 2093 break; 2094 case STATE_STOPPING: 2095 (cp->tlf)(sp); 2096 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2097 sppp_lcp_check_and_close(sp); 2098 break; 2099 case STATE_REQ_SENT: 2100 case STATE_ACK_RCVD: 2101 case STATE_ACK_SENT: 2102 (cp->tlf)(sp); 2103 sppp_cp_change_state(cp, sp, STATE_STOPPED); 2104 sppp_lcp_check_and_close(sp); 2105 break; 2106 } 2107 else 2108 /* TO+ event */ 2109 switch (sp->state[cp->protoidx]) { 2110 case STATE_CLOSING: 2111 case STATE_STOPPING: 2112 sppp_cp_send(sp, cp->proto, TERM_REQ, 2113 ++sp->pp_seq[cp->protoidx], 0, 0); 2114 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 2115 cp->TO, sp); 2116 break; 2117 case STATE_REQ_SENT: 2118 case STATE_ACK_RCVD: 2119 (cp->scr)(sp); 2120 /* sppp_cp_change_state() will restart the timer */ 2121 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 2122 break; 2123 case STATE_ACK_SENT: 2124 (cp->scr)(sp); 2125 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 2126 cp->TO, sp); 2127 break; 2128 } 2129 2130 splx(s); 2131 } 2132 2133 /* 2134 * Change the state of a control protocol in the state automaton. 2135 * Takes care of starting/stopping the restart timer. 2136 */ 2137 void 2138 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 2139 { 2140 KASSERT(sppp_locked(sp)); 2141 2142 sp->state[cp->protoidx] = newstate; 2143 callout_stop(&sp->ch[cp->protoidx]); 2144 switch (newstate) { 2145 case STATE_INITIAL: 2146 case STATE_STARTING: 2147 case STATE_CLOSED: 2148 case STATE_STOPPED: 2149 case STATE_OPENED: 2150 break; 2151 case STATE_CLOSING: 2152 case STATE_STOPPING: 2153 case STATE_REQ_SENT: 2154 case STATE_ACK_RCVD: 2155 case STATE_ACK_SENT: 2156 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 2157 cp->TO, sp); 2158 break; 2159 } 2160 } 2161 2162 /* 2163 *--------------------------------------------------------------------------* 2164 * * 2165 * The LCP implementation. * 2166 * * 2167 *--------------------------------------------------------------------------* 2168 */ 2169 static void 2170 sppp_lcp_init(struct sppp *sp) 2171 { 2172 sppp_lock_enter(sp); 2173 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 2174 sp->lcp.magic = 0; 2175 sp->state[IDX_LCP] = STATE_INITIAL; 2176 sp->fail_counter[IDX_LCP] = 0; 2177 sp->pp_seq[IDX_LCP] = 0; 2178 sp->pp_rseq[IDX_LCP] = 0; 2179 sp->lcp.protos = 0; 2180 2181 /* 2182 * Initialize counters and timeout values. Note that we don't 2183 * use the 3 seconds suggested in RFC 1661 since we are likely 2184 * running on a fast link. XXX We should probably implement 2185 * the exponential backoff option. Note that these values are 2186 * relevant for all control protocols, not just LCP only. 2187 */ 2188 sp->lcp.timeout = 1 * hz; 2189 sp->lcp.max_terminate = 2; 2190 sp->lcp.max_configure = 10; 2191 sp->lcp.max_failure = 10; 2192 callout_init(&sp->ch[IDX_LCP], 0); 2193 sppp_lock_exit(sp); 2194 } 2195 2196 static void 2197 sppp_lcp_up(struct sppp *sp) 2198 { 2199 STDDCL; 2200 2201 KASSERT(sppp_locked(sp)); 2202 2203 /* Initialize activity timestamp: opening a connection is an activity */ 2204 sp->pp_last_receive = sp->pp_last_activity = time_uptime; 2205 2206 /* 2207 * If this interface is passive or dial-on-demand, and we are 2208 * still in Initial state, it means we've got an incoming 2209 * call. Activate the interface. 2210 */ 2211 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2212 if (debug) 2213 log(LOG_DEBUG, 2214 "%s: Up event", ifp->if_xname); 2215 ifp->if_flags |= IFF_RUNNING; 2216 if (sp->state[IDX_LCP] == STATE_INITIAL) { 2217 if (debug) 2218 addlog("(incoming call)\n"); 2219 sp->pp_flags |= PP_CALLIN; 2220 lcp.Open(sp); 2221 } else if (debug) 2222 addlog("\n"); 2223 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 && 2224 (sp->state[IDX_LCP] == STATE_INITIAL)) { 2225 ifp->if_flags |= IFF_RUNNING; 2226 lcp.Open(sp); 2227 } 2228 2229 sppp_up_event(&lcp, sp); 2230 } 2231 2232 static void 2233 sppp_lcp_down(struct sppp *sp) 2234 { 2235 STDDCL; 2236 2237 KASSERT(sppp_locked(sp)); 2238 2239 sppp_down_event(&lcp, sp); 2240 2241 /* 2242 * If this is neither a dial-on-demand nor a passive 2243 * interface, simulate an ``ifconfig down'' action, so the 2244 * administrator can force a redial by another ``ifconfig 2245 * up''. XXX For leased line operation, should we immediately 2246 * try to reopen the connection here? 2247 */ 2248 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2249 if (debug) 2250 log(LOG_INFO, 2251 "%s: Down event (carrier loss), taking interface down.\n", 2252 ifp->if_xname); 2253 sppp_lock_exit(sp); 2254 if_down(ifp); 2255 sppp_lock_enter(sp); 2256 } else { 2257 if (debug) 2258 log(LOG_DEBUG, 2259 "%s: Down event (carrier loss)\n", 2260 ifp->if_xname); 2261 } 2262 sp->pp_flags &= ~PP_CALLIN; 2263 if (sp->state[IDX_LCP] != STATE_INITIAL) 2264 lcp.Close(sp); 2265 ifp->if_flags &= ~IFF_RUNNING; 2266 } 2267 2268 static void 2269 sppp_lcp_open(struct sppp *sp) 2270 { 2271 KASSERT(sppp_locked(sp)); 2272 2273 if (sp->pp_if.if_mtu < PP_MTU) { 2274 sp->lcp.mru = sp->pp_if.if_mtu; 2275 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2276 } else 2277 sp->lcp.mru = PP_MTU; 2278 sp->lcp.their_mru = PP_MTU; 2279 2280 /* 2281 * If we are authenticator, negotiate LCP_AUTH 2282 */ 2283 if (sp->hisauth.proto != 0) 2284 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2285 else 2286 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2287 sp->pp_flags &= ~PP_NEEDAUTH; 2288 sppp_open_event(&lcp, sp); 2289 } 2290 2291 static void 2292 sppp_lcp_close(struct sppp *sp) 2293 { 2294 KASSERT(sppp_locked(sp)); 2295 sppp_close_event(&lcp, sp); 2296 } 2297 2298 static void 2299 sppp_lcp_TO(void *cookie) 2300 { 2301 struct sppp *sp = (struct sppp*)cookie; 2302 KASSERT(!sppp_locked(sp)); 2303 2304 sppp_lock_enter(sp); 2305 sppp_to_event(&lcp, sp); 2306 sppp_lock_exit(sp); 2307 } 2308 2309 /* 2310 * Analyze a configure request. Return true if it was agreeable, and 2311 * caused action sca, false if it has been rejected or nak'ed, and 2312 * caused action scn. (The return value is used to make the state 2313 * transition decision in the state automaton.) 2314 */ 2315 static int 2316 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2317 { 2318 STDDCL; 2319 u_char *buf, *r, *p, l, blen; 2320 int origlen, rlen; 2321 uint32_t nmagic; 2322 u_short authproto; 2323 2324 KASSERT(sppp_locked(sp)); 2325 2326 len -= 4; 2327 origlen = len; 2328 buf = r = malloc (blen = len, M_TEMP, M_NOWAIT); 2329 if (! buf) 2330 return (0); 2331 2332 if (debug) 2333 log(LOG_DEBUG, "%s: lcp parse opts:", 2334 ifp->if_xname); 2335 2336 /* pass 1: check for things that need to be rejected */ 2337 p = (void *)(h + 1); 2338 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2339 /* Sanity check option length */ 2340 if (l > len) { 2341 /* 2342 * Malicious option - drop immediately. 2343 * XXX Maybe we should just RXJ it? 2344 */ 2345 addlog("%s: received malicious LCP option 0x%02x, " 2346 "length 0x%02x, (len: 0x%02x) dropping.\n", ifp->if_xname, 2347 p[0], l, len); 2348 goto drop; 2349 } 2350 if (debug) 2351 addlog(" %s", sppp_lcp_opt_name(*p)); 2352 switch (*p) { 2353 case LCP_OPT_MAGIC: 2354 /* Magic number. */ 2355 /* fall through, both are same length */ 2356 case LCP_OPT_ASYNC_MAP: 2357 /* Async control character map. */ 2358 if (len >= 6 || l == 6) 2359 continue; 2360 if (debug) 2361 addlog(" [invalid]"); 2362 break; 2363 case LCP_OPT_MRU: 2364 /* Maximum receive unit. */ 2365 if (len >= 4 && l == 4) 2366 continue; 2367 if (debug) 2368 addlog(" [invalid]"); 2369 break; 2370 case LCP_OPT_AUTH_PROTO: 2371 if (len < 4) { 2372 if (debug) 2373 addlog(" [invalid]"); 2374 break; 2375 } 2376 authproto = (p[2] << 8) + p[3]; 2377 if (authproto == PPP_CHAP && l != 5) { 2378 if (debug) 2379 addlog(" [invalid chap len]"); 2380 break; 2381 } 2382 if (sp->myauth.proto == 0) { 2383 /* we are not configured to do auth */ 2384 if (debug) 2385 addlog(" [not configured]"); 2386 break; 2387 } 2388 /* 2389 * Remote want us to authenticate, remember this, 2390 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2391 * up. 2392 */ 2393 sp->pp_flags |= PP_NEEDAUTH; 2394 continue; 2395 default: 2396 /* Others not supported. */ 2397 if (debug) 2398 addlog(" [rej]"); 2399 break; 2400 } 2401 if (rlen + l > blen) { 2402 if (debug) 2403 addlog(" [overflow]"); 2404 continue; 2405 } 2406 /* Add the option to rejected list. */ 2407 memcpy(r, p, l); 2408 r += l; 2409 rlen += l; 2410 } 2411 if (rlen) { 2412 if (debug) 2413 addlog(" send conf-rej\n"); 2414 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2415 goto end; 2416 } else if (debug) 2417 addlog("\n"); 2418 2419 /* 2420 * pass 2: check for option values that are unacceptable and 2421 * thus require to be nak'ed. 2422 */ 2423 if (debug) 2424 log(LOG_DEBUG, "%s: lcp parse opt values: ", 2425 ifp->if_xname); 2426 2427 p = (void *)(h + 1); 2428 len = origlen; 2429 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2430 if (debug) 2431 addlog(" %s", sppp_lcp_opt_name(*p)); 2432 switch (*p) { 2433 case LCP_OPT_MAGIC: 2434 /* Magic number -- extract. */ 2435 nmagic = (uint32_t)p[2] << 24 | 2436 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2437 if (nmagic != sp->lcp.magic) { 2438 if (debug) 2439 addlog(" 0x%x", nmagic); 2440 continue; 2441 } 2442 /* 2443 * Local and remote magics equal -- loopback? 2444 */ 2445 if (sp->pp_loopcnt >= LOOPALIVECNT*5) { 2446 printf ("%s: loopback\n", 2447 ifp->if_xname); 2448 sp->pp_loopcnt = 0; 2449 if (ifp->if_flags & IFF_UP) { 2450 sppp_lock_exit(sp); 2451 if_down(ifp); 2452 sppp_lock_enter(sp); 2453 IF_PURGE(&sp->pp_cpq); 2454 /* XXX ? */ 2455 lcp.Down(sp); 2456 lcp.Up(sp); 2457 } 2458 } else if (debug) 2459 addlog(" [glitch]"); 2460 ++sp->pp_loopcnt; 2461 /* 2462 * We negate our magic here, and NAK it. If 2463 * we see it later in an NAK packet, we 2464 * suggest a new one. 2465 */ 2466 nmagic = ~sp->lcp.magic; 2467 /* Gonna NAK it. */ 2468 p[2] = nmagic >> 24; 2469 p[3] = nmagic >> 16; 2470 p[4] = nmagic >> 8; 2471 p[5] = nmagic; 2472 break; 2473 2474 case LCP_OPT_ASYNC_MAP: 2475 /* 2476 * Async control character map -- just ignore it. 2477 * 2478 * Quote from RFC 1662, chapter 6: 2479 * To enable this functionality, synchronous PPP 2480 * implementations MUST always respond to the 2481 * Async-Control-Character-Map Configuration 2482 * Option with the LCP Configure-Ack. However, 2483 * acceptance of the Configuration Option does 2484 * not imply that the synchronous implementation 2485 * will do any ACCM mapping. Instead, all such 2486 * octet mapping will be performed by the 2487 * asynchronous-to-synchronous converter. 2488 */ 2489 continue; 2490 2491 case LCP_OPT_MRU: 2492 /* 2493 * Maximum receive unit. Always agreeable, 2494 * but ignored by now. 2495 */ 2496 sp->lcp.their_mru = p[2] * 256 + p[3]; 2497 if (debug) 2498 addlog(" %ld", sp->lcp.their_mru); 2499 continue; 2500 2501 case LCP_OPT_AUTH_PROTO: 2502 authproto = (p[2] << 8) + p[3]; 2503 if (sp->myauth.proto != authproto) { 2504 /* not agreed, nak */ 2505 if (debug) 2506 addlog(" [mine %s != his %s]", 2507 sppp_proto_name(sp->myauth.proto), 2508 sppp_proto_name(authproto)); 2509 p[2] = sp->myauth.proto >> 8; 2510 p[3] = sp->myauth.proto; 2511 break; 2512 } 2513 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2514 if (debug) 2515 addlog(" [chap not MD5]"); 2516 p[4] = CHAP_MD5; 2517 break; 2518 } 2519 continue; 2520 } 2521 if (rlen + l > blen) { 2522 if (debug) 2523 addlog(" [overflow]"); 2524 continue; 2525 } 2526 /* Add the option to nak'ed list. */ 2527 memcpy(r, p, l); 2528 r += l; 2529 rlen += l; 2530 } 2531 if (rlen) { 2532 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2533 if (debug) 2534 addlog(" max_failure (%d) exceeded, " 2535 "send conf-rej\n", 2536 sp->lcp.max_failure); 2537 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2538 } else { 2539 if (debug) 2540 addlog(" send conf-nak\n"); 2541 sppp_cp_send(sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2542 } 2543 goto end; 2544 } else { 2545 if (debug) 2546 addlog(" send conf-ack\n"); 2547 sp->fail_counter[IDX_LCP] = 0; 2548 sp->pp_loopcnt = 0; 2549 sppp_cp_send(sp, PPP_LCP, CONF_ACK, h->ident, origlen, h + 1); 2550 } 2551 2552 end: 2553 free(buf, M_TEMP); 2554 return (rlen == 0); 2555 2556 drop: 2557 free(buf, M_TEMP); 2558 return -1; 2559 } 2560 2561 /* 2562 * Analyze the LCP Configure-Reject option list, and adjust our 2563 * negotiation. 2564 */ 2565 static void 2566 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2567 { 2568 STDDCL; 2569 u_char *buf, *p, l; 2570 2571 KASSERT(sppp_locked(sp)); 2572 2573 len -= 4; 2574 buf = malloc (len, M_TEMP, M_NOWAIT); 2575 if (!buf) 2576 return; 2577 2578 if (debug) 2579 log(LOG_DEBUG, "%s: lcp rej opts:", 2580 ifp->if_xname); 2581 2582 p = (void *)(h + 1); 2583 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2584 /* Sanity check option length */ 2585 if (l > len) { 2586 /* 2587 * Malicious option - drop immediately. 2588 * XXX Maybe we should just RXJ it? 2589 */ 2590 addlog("%s: received malicious LCP option, " 2591 "dropping.\n", ifp->if_xname); 2592 goto drop; 2593 } 2594 if (debug) 2595 addlog(" %s", sppp_lcp_opt_name(*p)); 2596 switch (*p) { 2597 case LCP_OPT_MAGIC: 2598 /* Magic number -- can't use it, use 0 */ 2599 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2600 sp->lcp.magic = 0; 2601 break; 2602 case LCP_OPT_MRU: 2603 /* 2604 * We try to negotiate a lower MRU if the underlying 2605 * link's MTU is less than PP_MTU (e.g. PPPoE). If the 2606 * peer rejects this lower rate, fallback to the 2607 * default. 2608 */ 2609 if (debug) { 2610 addlog("%s: warning: peer rejected our MRU of " 2611 "%ld bytes. Defaulting to %d bytes\n", 2612 ifp->if_xname, sp->lcp.mru, PP_MTU); 2613 } 2614 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2615 sp->lcp.mru = PP_MTU; 2616 break; 2617 case LCP_OPT_AUTH_PROTO: 2618 /* 2619 * Peer doesn't want to authenticate himself, 2620 * deny unless this is a dialout call, and 2621 * SPPP_AUTHFLAG_NOCALLOUT is set. 2622 */ 2623 if ((sp->pp_flags & PP_CALLIN) == 0 && 2624 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2625 if (debug) 2626 addlog(" [don't insist on auth " 2627 "for callout]"); 2628 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2629 break; 2630 } 2631 if (debug) 2632 addlog("[access denied]\n"); 2633 lcp.Close(sp); 2634 break; 2635 } 2636 } 2637 if (debug) 2638 addlog("\n"); 2639 drop: 2640 free(buf, M_TEMP); 2641 return; 2642 } 2643 2644 /* 2645 * Analyze the LCP Configure-NAK option list, and adjust our 2646 * negotiation. 2647 */ 2648 static void 2649 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2650 { 2651 STDDCL; 2652 u_char *buf, *p, l, blen; 2653 uint32_t magic; 2654 2655 KASSERT(sppp_locked(sp)); 2656 2657 len -= 4; 2658 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 2659 if (!buf) 2660 return; 2661 2662 if (debug) 2663 log(LOG_DEBUG, "%s: lcp nak opts:", 2664 ifp->if_xname); 2665 2666 p = (void *)(h + 1); 2667 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 2668 /* Sanity check option length */ 2669 if (l > len) { 2670 /* 2671 * Malicious option - drop immediately. 2672 * XXX Maybe we should just RXJ it? 2673 */ 2674 addlog("%s: received malicious LCP option, " 2675 "dropping.\n", ifp->if_xname); 2676 goto drop; 2677 } 2678 if (debug) 2679 addlog(" %s", sppp_lcp_opt_name(*p)); 2680 switch (*p) { 2681 case LCP_OPT_MAGIC: 2682 /* Magic number -- renegotiate */ 2683 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2684 len >= 6 && l == 6) { 2685 magic = (uint32_t)p[2] << 24 | 2686 (uint32_t)p[3] << 16 | p[4] << 8 | p[5]; 2687 /* 2688 * If the remote magic is our negated one, 2689 * this looks like a loopback problem. 2690 * Suggest a new magic to make sure. 2691 */ 2692 if (magic == ~sp->lcp.magic) { 2693 if (debug) 2694 addlog(" magic glitch"); 2695 sp->lcp.magic = cprng_fast32(); 2696 } else { 2697 sp->lcp.magic = magic; 2698 if (debug) 2699 addlog(" %d", magic); 2700 } 2701 } 2702 break; 2703 case LCP_OPT_MRU: 2704 /* 2705 * Peer wants to advise us to negotiate an MRU. 2706 * Agree on it if it's reasonable, or use 2707 * default otherwise. 2708 */ 2709 if (len >= 4 && l == 4) { 2710 u_int mru = p[2] * 256 + p[3]; 2711 if (debug) 2712 addlog(" %d", mru); 2713 if (mru < PPP_MINMRU || mru > sp->pp_if.if_mtu) 2714 mru = sp->pp_if.if_mtu; 2715 sp->lcp.mru = mru; 2716 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2717 } 2718 break; 2719 case LCP_OPT_AUTH_PROTO: 2720 /* 2721 * Peer doesn't like our authentication method, 2722 * deny. 2723 */ 2724 if (debug) 2725 addlog("[access denied]\n"); 2726 lcp.Close(sp); 2727 break; 2728 } 2729 } 2730 if (debug) 2731 addlog("\n"); 2732 drop: 2733 free(buf, M_TEMP); 2734 return; 2735 } 2736 2737 static void 2738 sppp_lcp_tlu(struct sppp *sp) 2739 { 2740 STDDCL; 2741 int i; 2742 uint32_t mask; 2743 2744 KASSERT(sppp_locked(sp)); 2745 2746 /* XXX ? */ 2747 if (! (ifp->if_flags & IFF_UP) && 2748 (ifp->if_flags & IFF_RUNNING)) { 2749 /* Coming out of loopback mode. */ 2750 sppp_lock_exit(sp); 2751 if_up(ifp); 2752 sppp_lock_enter(sp); 2753 } 2754 2755 for (i = 0; i < IDX_COUNT; i++) 2756 if ((cps[i])->flags & CP_QUAL) 2757 (cps[i])->Open(sp); 2758 2759 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2760 (sp->pp_flags & PP_NEEDAUTH) != 0) 2761 sp->pp_phase = SPPP_PHASE_AUTHENTICATE; 2762 else 2763 sp->pp_phase = SPPP_PHASE_NETWORK; 2764 2765 if (debug) 2766 { 2767 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 2768 sppp_phase_name(sp->pp_phase)); 2769 } 2770 2771 /* 2772 * Open all authentication protocols. This is even required 2773 * if we already proceeded to network phase, since it might be 2774 * that remote wants us to authenticate, so we might have to 2775 * send a PAP request. Undesired authentication protocols 2776 * don't do anything when they get an Open event. 2777 */ 2778 for (i = 0; i < IDX_COUNT; i++) 2779 if ((cps[i])->flags & CP_AUTH) 2780 (cps[i])->Open(sp); 2781 2782 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2783 /* Notify all NCPs. */ 2784 for (i = 0; i < IDX_COUNT; i++) 2785 if ((cps[i])->flags & CP_NCP) 2786 (cps[i])->Open(sp); 2787 } 2788 2789 /* Send Up events to all started protos. */ 2790 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) { 2791 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2792 (cps[i])->Up(sp); 2793 } 2794 } 2795 2796 /* notify low-level driver of state change */ 2797 if (sp->pp_chg) 2798 sp->pp_chg(sp, (int)sp->pp_phase); 2799 2800 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2801 /* if no NCP is starting, close down */ 2802 sppp_lcp_check_and_close(sp); 2803 } 2804 2805 static void 2806 sppp_lcp_tld(struct sppp *sp) 2807 { 2808 STDDCL; 2809 int i; 2810 uint32_t mask; 2811 2812 KASSERT(sppp_locked(sp)); 2813 2814 sppp_change_phase(sp, SPPP_PHASE_TERMINATE); 2815 2816 /* 2817 * Take upper layers down. We send the Down event first and 2818 * the Close second to prevent the upper layers from sending 2819 * ``a flurry of terminate-request packets'', as the RFC 2820 * describes it. 2821 */ 2822 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) { 2823 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2824 (cps[i])->Down(sp); 2825 (cps[i])->Close(sp); 2826 } 2827 } 2828 } 2829 2830 static void 2831 sppp_lcp_tls(struct sppp *sp) 2832 { 2833 STDDCL; 2834 2835 KASSERT(sppp_locked(sp)); 2836 2837 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2838 printf("%s: authentication failed %d times, not retrying again\n", 2839 sp->pp_if.if_xname, sp->pp_auth_failures); 2840 sppp_lock_exit(sp); 2841 if_down(&sp->pp_if); 2842 sppp_lock_enter(sp); 2843 return; 2844 } 2845 2846 sp->pp_phase = SPPP_PHASE_ESTABLISH; 2847 2848 if (debug) 2849 { 2850 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 2851 sppp_phase_name(sp->pp_phase)); 2852 } 2853 2854 /* Notify lower layer if desired. */ 2855 if (sp->pp_tls) 2856 (sp->pp_tls)(sp); 2857 } 2858 2859 static void 2860 sppp_lcp_tlf(struct sppp *sp) 2861 { 2862 KASSERT(sppp_locked(sp)); 2863 2864 sp->pp_phase = SPPP_PHASE_DEAD; 2865 2866 if (debug) 2867 { 2868 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 2869 sppp_phase_name(sp->pp_phase)); 2870 } 2871 2872 /* Notify lower layer if desired. */ 2873 if (sp->pp_tlf) 2874 (sp->pp_tlf)(sp); 2875 } 2876 2877 static void 2878 sppp_lcp_scr(struct sppp *sp) 2879 { 2880 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2881 int i = 0; 2882 u_short authproto; 2883 2884 KASSERT(sppp_locked(sp)); 2885 2886 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2887 if (! sp->lcp.magic) 2888 sp->lcp.magic = cprng_fast32(); 2889 opt[i++] = LCP_OPT_MAGIC; 2890 opt[i++] = 6; 2891 opt[i++] = sp->lcp.magic >> 24; 2892 opt[i++] = sp->lcp.magic >> 16; 2893 opt[i++] = sp->lcp.magic >> 8; 2894 opt[i++] = sp->lcp.magic; 2895 } 2896 2897 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2898 opt[i++] = LCP_OPT_MRU; 2899 opt[i++] = 4; 2900 opt[i++] = sp->lcp.mru >> 8; 2901 opt[i++] = sp->lcp.mru; 2902 } 2903 2904 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2905 authproto = sp->hisauth.proto; 2906 opt[i++] = LCP_OPT_AUTH_PROTO; 2907 opt[i++] = authproto == PPP_CHAP? 5: 4; 2908 opt[i++] = authproto >> 8; 2909 opt[i++] = authproto; 2910 if (authproto == PPP_CHAP) 2911 opt[i++] = CHAP_MD5; 2912 } 2913 2914 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2915 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2916 } 2917 2918 /* 2919 * Check the open NCPs, return true if at least one NCP is open. 2920 */ 2921 static int 2922 sppp_ncp_check(struct sppp *sp) 2923 { 2924 int i, mask; 2925 2926 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2927 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2928 return 1; 2929 return 0; 2930 } 2931 2932 /* 2933 * Re-check the open NCPs and see if we should terminate the link. 2934 * Called by the NCPs during their tlf action handling. 2935 */ 2936 static void 2937 sppp_lcp_check_and_close(struct sppp *sp) 2938 { 2939 KASSERT(sppp_locked(sp)); 2940 2941 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2942 /* don't bother, we are already going down */ 2943 return; 2944 2945 if (sppp_ncp_check(sp)) 2946 return; 2947 lcp.Close(sp); 2948 } 2949 2950 2951 /* 2952 *--------------------------------------------------------------------------* 2953 * * 2954 * The IPCP implementation. * 2955 * * 2956 *--------------------------------------------------------------------------* 2957 */ 2958 2959 static void 2960 sppp_ipcp_init(struct sppp *sp) 2961 { 2962 int error; 2963 2964 sppp_lock_enter(sp); 2965 sp->ipcp.opts = 0; 2966 sp->ipcp.flags = 0; 2967 sp->state[IDX_IPCP] = STATE_INITIAL; 2968 sp->fail_counter[IDX_IPCP] = 0; 2969 sp->pp_seq[IDX_IPCP] = 0; 2970 sp->pp_rseq[IDX_IPCP] = 0; 2971 callout_init(&sp->ch[IDX_IPCP], 0); 2972 2973 error = workqueue_create(&sp->ipcp.update_addrs_wq, "ipcp_update_addrs", 2974 sppp_update_ip_addrs_work, sp, PRI_SOFTNET, IPL_NET, 0); 2975 if (error) 2976 panic("%s: update_addrs workqueue_create failed (%d)\n", 2977 __func__, error); 2978 sp->ipcp.update_addrs_q = pcq_create(IPCP_UPDATE_LIMIT, KM_SLEEP); 2979 2980 sp->ipcp.update_addrs_enqueued = 0; 2981 sppp_lock_exit(sp); 2982 } 2983 2984 static void 2985 sppp_ipcp_up(struct sppp *sp) 2986 { 2987 KASSERT(sppp_locked(sp)); 2988 sppp_up_event(&ipcp, sp); 2989 } 2990 2991 static void 2992 sppp_ipcp_down(struct sppp *sp) 2993 { 2994 KASSERT(sppp_locked(sp)); 2995 sppp_down_event(&ipcp, sp); 2996 } 2997 2998 static void 2999 sppp_ipcp_open(struct sppp *sp) 3000 { 3001 STDDCL; 3002 uint32_t myaddr, hisaddr; 3003 3004 KASSERT(sppp_locked(sp)); 3005 3006 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 3007 sp->ipcp.req_myaddr = 0; 3008 sp->ipcp.req_hisaddr = 0; 3009 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 3010 3011 #ifdef INET 3012 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3013 #else 3014 myaddr = hisaddr = 0; 3015 #endif 3016 /* 3017 * If we don't have his address, this probably means our 3018 * interface doesn't want to talk IP at all. (This could 3019 * be the case if somebody wants to speak only IPX, for 3020 * example.) Don't open IPCP in this case. 3021 */ 3022 if (hisaddr == 0) { 3023 /* XXX this message should go away */ 3024 if (debug) 3025 log(LOG_DEBUG, "%s: ipcp_open(): no IP interface\n", 3026 ifp->if_xname); 3027 return; 3028 } 3029 3030 if (myaddr == 0) { 3031 /* 3032 * I don't have an assigned address, so i need to 3033 * negotiate my address. 3034 */ 3035 sp->ipcp.flags |= IPCP_MYADDR_DYN; 3036 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3037 } 3038 if (hisaddr == 1) { 3039 /* 3040 * XXX - remove this hack! 3041 * remote has no valid address, we need to get one assigned. 3042 */ 3043 sp->ipcp.flags |= IPCP_HISADDR_DYN; 3044 } 3045 sppp_open_event(&ipcp, sp); 3046 } 3047 3048 static void 3049 sppp_ipcp_close(struct sppp *sp) 3050 { 3051 3052 KASSERT(sppp_locked(sp)); 3053 sppp_close_event(&ipcp, sp); 3054 3055 #ifdef INET 3056 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 3057 /* 3058 * Some address was dynamic, clear it again. 3059 */ 3060 sppp_clear_ip_addrs(sp); 3061 #endif 3062 } 3063 3064 static void 3065 sppp_ipcp_TO(void *cookie) 3066 { 3067 struct sppp *sp = cookie; 3068 3069 KASSERT(!sppp_locked(sp)); 3070 3071 sppp_lock_enter(sp); 3072 sppp_to_event(&ipcp, (struct sppp *)cookie); 3073 sppp_lock_exit(sp); 3074 } 3075 3076 /* 3077 * Analyze a configure request. Return true if it was agreeable, and 3078 * caused action sca, false if it has been rejected or nak'ed, and 3079 * caused action scn. (The return value is used to make the state 3080 * transition decision in the state automaton.) 3081 */ 3082 static int 3083 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3084 { 3085 u_char *buf, *r, *p, l, blen; 3086 struct ifnet *ifp = &sp->pp_if; 3087 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3088 uint32_t hisaddr, desiredaddr; 3089 3090 KASSERT(sppp_locked(sp)); 3091 len -= 4; 3092 origlen = len; 3093 /* 3094 * Make sure to allocate a buf that can at least hold a 3095 * conf-nak with an `address' option. We might need it below. 3096 */ 3097 blen = len < 6 ? 6 : len; 3098 buf = r = malloc (blen, M_TEMP, M_NOWAIT); 3099 if (! buf) 3100 return (0); 3101 3102 /* pass 1: see if we can recognize them */ 3103 if (debug) 3104 log(LOG_DEBUG, "%s: ipcp parse opts:", 3105 ifp->if_xname); 3106 p = (void *)(h + 1); 3107 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3108 /* Sanity check option length */ 3109 if (l > len) { 3110 /* XXX should we just RXJ? */ 3111 addlog("%s: malicious IPCP option received, dropping\n", 3112 ifp->if_xname); 3113 goto drop; 3114 } 3115 if (debug) 3116 addlog(" %s", sppp_ipcp_opt_name(*p)); 3117 switch (*p) { 3118 #ifdef notyet 3119 case IPCP_OPT_COMPRESSION: 3120 if (len >= 6 && l >= 6) { 3121 /* correctly formed compress option */ 3122 continue; 3123 } 3124 if (debug) 3125 addlog(" [invalid]"); 3126 break; 3127 #endif 3128 case IPCP_OPT_ADDRESS: 3129 if (len >= 6 && l == 6) { 3130 /* correctly formed address option */ 3131 continue; 3132 } 3133 if (debug) 3134 addlog(" [invalid]"); 3135 break; 3136 default: 3137 /* Others not supported. */ 3138 if (debug) 3139 addlog(" [rej]"); 3140 break; 3141 } 3142 /* Add the option to rejected list. */ 3143 if (rlen + l > blen) { 3144 if (debug) 3145 addlog(" [overflow]"); 3146 continue; 3147 } 3148 memcpy(r, p, l); 3149 r += l; 3150 rlen += l; 3151 } 3152 if (rlen) { 3153 if (debug) 3154 addlog(" send conf-rej\n"); 3155 sppp_cp_send(sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 3156 goto end; 3157 } else if (debug) 3158 addlog("\n"); 3159 3160 /* pass 2: parse option values */ 3161 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 3162 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 3163 else 3164 #ifdef INET 3165 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 3166 #else 3167 hisaddr = 0; 3168 #endif 3169 if (debug) 3170 log(LOG_DEBUG, "%s: ipcp parse opt values: ", 3171 ifp->if_xname); 3172 p = (void *)(h + 1); 3173 len = origlen; 3174 for (rlen=0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3175 if (debug) 3176 addlog(" %s", sppp_ipcp_opt_name(*p)); 3177 switch (*p) { 3178 #ifdef notyet 3179 case IPCP_OPT_COMPRESSION: 3180 continue; 3181 #endif 3182 case IPCP_OPT_ADDRESS: 3183 desiredaddr = p[2] << 24 | p[3] << 16 | 3184 p[4] << 8 | p[5]; 3185 if (desiredaddr == hisaddr || 3186 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 3187 /* 3188 * Peer's address is same as our value, 3189 * this is agreeable. Gonna conf-ack 3190 * it. 3191 */ 3192 if (debug) 3193 addlog(" %s [ack]", 3194 sppp_dotted_quad(hisaddr)); 3195 /* record that we've seen it already */ 3196 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 3197 sp->ipcp.req_hisaddr = desiredaddr; 3198 hisaddr = desiredaddr; 3199 continue; 3200 } 3201 /* 3202 * The address wasn't agreeable. This is either 3203 * he sent us 0.0.0.0, asking to assign him an 3204 * address, or he send us another address not 3205 * matching our value. Either case, we gonna 3206 * conf-nak it with our value. 3207 */ 3208 if (debug) { 3209 if (desiredaddr == 0) 3210 addlog(" [addr requested]"); 3211 else 3212 addlog(" %s [not agreed]", 3213 sppp_dotted_quad(desiredaddr)); 3214 } 3215 3216 p[2] = hisaddr >> 24; 3217 p[3] = hisaddr >> 16; 3218 p[4] = hisaddr >> 8; 3219 p[5] = hisaddr; 3220 break; 3221 } 3222 if (rlen + l > blen) { 3223 if (debug) 3224 addlog(" [overflow]"); 3225 continue; 3226 } 3227 /* Add the option to nak'ed list. */ 3228 memcpy(r, p, l); 3229 r += l; 3230 rlen += l; 3231 } 3232 3233 /* 3234 * If we are about to conf-ack the request, but haven't seen 3235 * his address so far, gonna conf-nak it instead, with the 3236 * `address' option present and our idea of his address being 3237 * filled in there, to request negotiation of both addresses. 3238 * 3239 * XXX This can result in an endless req - nak loop if peer 3240 * doesn't want to send us his address. Q: What should we do 3241 * about it? XXX A: implement the max-failure counter. 3242 */ 3243 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 3244 buf[0] = IPCP_OPT_ADDRESS; 3245 buf[1] = 6; 3246 buf[2] = hisaddr >> 24; 3247 buf[3] = hisaddr >> 16; 3248 buf[4] = hisaddr >> 8; 3249 buf[5] = hisaddr; 3250 rlen = 6; 3251 if (debug) 3252 addlog(" still need hisaddr"); 3253 } 3254 3255 if (rlen) { 3256 if (debug) 3257 addlog(" send conf-nak\n"); 3258 sppp_cp_send(sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 3259 } else { 3260 if (debug) 3261 addlog(" send conf-ack\n"); 3262 sppp_cp_send(sp, PPP_IPCP, CONF_ACK, h->ident, origlen, h + 1); 3263 } 3264 3265 end: 3266 free(buf, M_TEMP); 3267 return (rlen == 0); 3268 3269 drop: 3270 free(buf, M_TEMP); 3271 return -1; 3272 } 3273 3274 /* 3275 * Analyze the IPCP Configure-Reject option list, and adjust our 3276 * negotiation. 3277 */ 3278 static void 3279 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3280 { 3281 u_char *buf, *p, l, blen; 3282 struct ifnet *ifp = &sp->pp_if; 3283 int debug = ifp->if_flags & IFF_DEBUG; 3284 3285 KASSERT(sppp_locked(sp)); 3286 3287 len -= 4; 3288 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 3289 if (!buf) 3290 return; 3291 3292 if (debug) 3293 log(LOG_DEBUG, "%s: ipcp rej opts:", 3294 ifp->if_xname); 3295 3296 p = (void *)(h + 1); 3297 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3298 /* Sanity check option length */ 3299 if (l > len) { 3300 /* XXX should we just RXJ? */ 3301 addlog("%s: malicious IPCP option received, dropping\n", 3302 ifp->if_xname); 3303 goto drop; 3304 } 3305 if (debug) 3306 addlog(" %s", sppp_ipcp_opt_name(*p)); 3307 switch (*p) { 3308 case IPCP_OPT_ADDRESS: 3309 /* 3310 * Peer doesn't grok address option. This is 3311 * bad. XXX Should we better give up here? 3312 */ 3313 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 3314 break; 3315 #ifdef notyet 3316 case IPCP_OPT_COMPRESS: 3317 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 3318 break; 3319 #endif 3320 } 3321 } 3322 if (debug) 3323 addlog("\n"); 3324 drop: 3325 free(buf, M_TEMP); 3326 return; 3327 } 3328 3329 /* 3330 * Analyze the IPCP Configure-NAK option list, and adjust our 3331 * negotiation. 3332 */ 3333 static void 3334 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3335 { 3336 u_char *p, l; 3337 struct ifnet *ifp = &sp->pp_if; 3338 int debug = ifp->if_flags & IFF_DEBUG; 3339 uint32_t wantaddr; 3340 3341 KASSERT(sppp_locked(sp)); 3342 3343 len -= 4; 3344 3345 if (debug) 3346 log(LOG_DEBUG, "%s: ipcp nak opts:", 3347 ifp->if_xname); 3348 3349 p = (void *)(h + 1); 3350 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3351 /* Sanity check option length */ 3352 if (l > len) { 3353 /* XXX should we just RXJ? */ 3354 addlog("%s: malicious IPCP option received, dropping\n", 3355 ifp->if_xname); 3356 return; 3357 } 3358 if (debug) 3359 addlog(" %s", sppp_ipcp_opt_name(*p)); 3360 switch (*p) { 3361 case IPCP_OPT_ADDRESS: 3362 /* 3363 * Peer doesn't like our local IP address. See 3364 * if we can do something for him. We'll drop 3365 * him our address then. 3366 */ 3367 if (len >= 6 && l == 6) { 3368 wantaddr = p[2] << 24 | p[3] << 16 | 3369 p[4] << 8 | p[5]; 3370 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3371 if (debug) 3372 addlog(" [wantaddr %s]", 3373 sppp_dotted_quad(wantaddr)); 3374 /* 3375 * When doing dynamic address assignment, 3376 * we accept his offer. Otherwise, we 3377 * ignore it and thus continue to negotiate 3378 * our already existing value. 3379 */ 3380 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3381 if (debug) 3382 addlog(" [agree]"); 3383 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3384 sp->ipcp.req_myaddr = wantaddr; 3385 } 3386 } 3387 break; 3388 3389 case IPCP_OPT_PRIMDNS: 3390 if (len >= 6 && l == 6) { 3391 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3392 p[4] << 8 | p[5]; 3393 } 3394 break; 3395 3396 case IPCP_OPT_SECDNS: 3397 if (len >= 6 && l == 6) { 3398 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3399 p[4] << 8 | p[5]; 3400 } 3401 break; 3402 #ifdef notyet 3403 case IPCP_OPT_COMPRESS: 3404 /* 3405 * Peer wants different compression parameters. 3406 */ 3407 break; 3408 #endif 3409 } 3410 } 3411 if (debug) 3412 addlog("\n"); 3413 } 3414 3415 static void 3416 sppp_ipcp_tlu(struct sppp *sp) 3417 { 3418 #ifdef INET 3419 KASSERT(sppp_locked(sp)); 3420 /* we are up. Set addresses and notify anyone interested */ 3421 sppp_set_ip_addrs(sp); 3422 #endif 3423 } 3424 3425 static void 3426 sppp_ipcp_tld(struct sppp *sp) 3427 { 3428 } 3429 3430 static void 3431 sppp_ipcp_tls(struct sppp *sp) 3432 { 3433 KASSERT(sppp_locked(sp)); 3434 /* indicate to LCP that it must stay alive */ 3435 sp->lcp.protos |= (1 << IDX_IPCP); 3436 } 3437 3438 static void 3439 sppp_ipcp_tlf(struct sppp *sp) 3440 { 3441 KASSERT(sppp_locked(sp)); 3442 /* we no longer need LCP */ 3443 sp->lcp.protos &= ~(1 << IDX_IPCP); 3444 } 3445 3446 static void 3447 sppp_ipcp_scr(struct sppp *sp) 3448 { 3449 uint8_t opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3450 #ifdef INET 3451 uint32_t ouraddr; 3452 #endif 3453 int i = 0; 3454 3455 KASSERT(sppp_locked(sp)); 3456 3457 #ifdef notyet 3458 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3459 opt[i++] = IPCP_OPT_COMPRESSION; 3460 opt[i++] = 6; 3461 opt[i++] = 0; /* VJ header compression */ 3462 opt[i++] = 0x2d; /* VJ header compression */ 3463 opt[i++] = max_slot_id; 3464 opt[i++] = comp_slot_id; 3465 } 3466 #endif 3467 3468 #ifdef INET 3469 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3470 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3471 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3472 else 3473 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3474 opt[i++] = IPCP_OPT_ADDRESS; 3475 opt[i++] = 6; 3476 opt[i++] = ouraddr >> 24; 3477 opt[i++] = ouraddr >> 16; 3478 opt[i++] = ouraddr >> 8; 3479 opt[i++] = ouraddr; 3480 } 3481 #endif 3482 3483 if (sp->query_dns & 1) { 3484 opt[i++] = IPCP_OPT_PRIMDNS; 3485 opt[i++] = 6; 3486 opt[i++] = sp->dns_addrs[0] >> 24; 3487 opt[i++] = sp->dns_addrs[0] >> 16; 3488 opt[i++] = sp->dns_addrs[0] >> 8; 3489 opt[i++] = sp->dns_addrs[0]; 3490 } 3491 if (sp->query_dns & 2) { 3492 opt[i++] = IPCP_OPT_SECDNS; 3493 opt[i++] = 6; 3494 opt[i++] = sp->dns_addrs[1] >> 24; 3495 opt[i++] = sp->dns_addrs[1] >> 16; 3496 opt[i++] = sp->dns_addrs[1] >> 8; 3497 opt[i++] = sp->dns_addrs[1]; 3498 } 3499 3500 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3501 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3502 } 3503 3504 3505 /* 3506 *--------------------------------------------------------------------------* 3507 * * 3508 * The IPv6CP implementation. * 3509 * * 3510 *--------------------------------------------------------------------------* 3511 */ 3512 3513 #ifdef INET6 3514 static void 3515 sppp_ipv6cp_init(struct sppp *sp) 3516 { 3517 sppp_lock_enter(sp); 3518 sp->ipv6cp.opts = 0; 3519 sp->ipv6cp.flags = 0; 3520 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3521 sp->fail_counter[IDX_IPV6CP] = 0; 3522 sp->pp_seq[IDX_IPV6CP] = 0; 3523 sp->pp_rseq[IDX_IPV6CP] = 0; 3524 callout_init(&sp->ch[IDX_IPV6CP], 0); 3525 sppp_lock_exit(sp); 3526 } 3527 3528 static void 3529 sppp_ipv6cp_up(struct sppp *sp) 3530 { 3531 KASSERT(sppp_locked(sp)); 3532 sppp_up_event(&ipv6cp, sp); 3533 } 3534 3535 static void 3536 sppp_ipv6cp_down(struct sppp *sp) 3537 { 3538 KASSERT(sppp_locked(sp)); 3539 sppp_down_event(&ipv6cp, sp); 3540 } 3541 3542 static void 3543 sppp_ipv6cp_open(struct sppp *sp) 3544 { 3545 STDDCL; 3546 struct in6_addr myaddr, hisaddr; 3547 3548 KASSERT(sppp_locked(sp)); 3549 3550 #ifdef IPV6CP_MYIFID_DYN 3551 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3552 #else 3553 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3554 #endif 3555 3556 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3557 /* 3558 * If we don't have our address, this probably means our 3559 * interface doesn't want to talk IPv6 at all. (This could 3560 * be the case if somebody wants to speak only IPX, for 3561 * example.) Don't open IPv6CP in this case. 3562 */ 3563 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3564 /* XXX this message should go away */ 3565 if (debug) 3566 log(LOG_DEBUG, "%s: ipv6cp_open(): no IPv6 interface\n", 3567 ifp->if_xname); 3568 return; 3569 } 3570 3571 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3572 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3573 sppp_open_event(&ipv6cp, sp); 3574 } 3575 3576 static void 3577 sppp_ipv6cp_close(struct sppp *sp) 3578 { 3579 KASSERT(sppp_locked(sp)); 3580 sppp_close_event(&ipv6cp, sp); 3581 } 3582 3583 static void 3584 sppp_ipv6cp_TO(void *cookie) 3585 { 3586 struct sppp *sp = cookie; 3587 KASSERT(!sppp_locked(sp)); 3588 3589 sppp_lock_enter(sp); 3590 sppp_to_event(&ipv6cp, (struct sppp *)cookie); 3591 sppp_lock_exit(sp); 3592 } 3593 3594 /* 3595 * Analyze a configure request. Return true if it was agreeable, and 3596 * caused action sca, false if it has been rejected or nak'ed, and 3597 * caused action scn. (The return value is used to make the state 3598 * transition decision in the state automaton.) 3599 */ 3600 static int 3601 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3602 { 3603 u_char *buf, *r, *p, l, blen; 3604 struct ifnet *ifp = &sp->pp_if; 3605 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3606 struct in6_addr myaddr, desiredaddr, suggestaddr; 3607 int ifidcount; 3608 int type; 3609 int collision, nohisaddr; 3610 char ip6buf[INET6_ADDRSTRLEN]; 3611 3612 KASSERT(sppp_locked(sp)); 3613 3614 len -= 4; 3615 origlen = len; 3616 /* 3617 * Make sure to allocate a buf that can at least hold a 3618 * conf-nak with an `address' option. We might need it below. 3619 */ 3620 blen = len < 6 ? 6 : len; 3621 buf = r = malloc (blen, M_TEMP, M_NOWAIT); 3622 if (! buf) 3623 return (0); 3624 3625 /* pass 1: see if we can recognize them */ 3626 if (debug) 3627 log(LOG_DEBUG, "%s: ipv6cp parse opts:", 3628 ifp->if_xname); 3629 p = (void *)(h + 1); 3630 ifidcount = 0; 3631 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3632 /* Sanity check option length */ 3633 if (l > len) { 3634 /* XXX just RXJ? */ 3635 addlog("%s: received malicious IPCPv6 option, " 3636 "dropping\n", ifp->if_xname); 3637 goto drop; 3638 } 3639 if (debug) 3640 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3641 switch (*p) { 3642 case IPV6CP_OPT_IFID: 3643 if (len >= 10 && l == 10 && ifidcount == 0) { 3644 /* correctly formed address option */ 3645 ifidcount++; 3646 continue; 3647 } 3648 if (debug) 3649 addlog(" [invalid]"); 3650 break; 3651 #ifdef notyet 3652 case IPV6CP_OPT_COMPRESSION: 3653 if (len >= 4 && l >= 4) { 3654 /* correctly formed compress option */ 3655 continue; 3656 } 3657 if (debug) 3658 addlog(" [invalid]"); 3659 break; 3660 #endif 3661 default: 3662 /* Others not supported. */ 3663 if (debug) 3664 addlog(" [rej]"); 3665 break; 3666 } 3667 if (rlen + l > blen) { 3668 if (debug) 3669 addlog(" [overflow]"); 3670 continue; 3671 } 3672 /* Add the option to rejected list. */ 3673 memcpy(r, p, l); 3674 r += l; 3675 rlen += l; 3676 } 3677 if (rlen) { 3678 if (debug) 3679 addlog(" send conf-rej\n"); 3680 sppp_cp_send(sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3681 goto end; 3682 } else if (debug) 3683 addlog("\n"); 3684 3685 /* pass 2: parse option values */ 3686 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3687 if (debug) 3688 log(LOG_DEBUG, "%s: ipv6cp parse opt values: ", 3689 ifp->if_xname); 3690 p = (void *)(h + 1); 3691 len = origlen; 3692 type = CONF_ACK; 3693 for (rlen = 0; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3694 if (debug) 3695 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3696 switch (*p) { 3697 #ifdef notyet 3698 case IPV6CP_OPT_COMPRESSION: 3699 continue; 3700 #endif 3701 case IPV6CP_OPT_IFID: 3702 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3703 memcpy(&desiredaddr.s6_addr[8], &p[2], 8); 3704 collision = (memcmp(&desiredaddr.s6_addr[8], 3705 &myaddr.s6_addr[8], 8) == 0); 3706 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3707 3708 desiredaddr.s6_addr16[0] = htons(0xfe80); 3709 (void)in6_setscope(&desiredaddr, &sp->pp_if, NULL); 3710 3711 if (!collision && !nohisaddr) { 3712 /* no collision, hisaddr known - Conf-Ack */ 3713 type = CONF_ACK; 3714 3715 if (debug) { 3716 addlog(" %s [%s]", 3717 IN6_PRINT(ip6buf, &desiredaddr), 3718 sppp_cp_type_name(type)); 3719 } 3720 continue; 3721 } 3722 3723 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3724 if (collision && nohisaddr) { 3725 /* collision, hisaddr unknown - Conf-Rej */ 3726 type = CONF_REJ; 3727 memset(&p[2], 0, 8); 3728 } else { 3729 /* 3730 * - no collision, hisaddr unknown, or 3731 * - collision, hisaddr known 3732 * Conf-Nak, suggest hisaddr 3733 */ 3734 type = CONF_NAK; 3735 sppp_suggest_ip6_addr(sp, &suggestaddr); 3736 memcpy(&p[2], &suggestaddr.s6_addr[8], 8); 3737 } 3738 if (debug) 3739 addlog(" %s [%s]", IN6_PRINT(ip6buf, &desiredaddr), 3740 sppp_cp_type_name(type)); 3741 break; 3742 } 3743 if (rlen + l > blen) { 3744 if (debug) 3745 addlog(" [overflow]"); 3746 continue; 3747 } 3748 /* Add the option to nak'ed list. */ 3749 memcpy(r, p, l); 3750 r += l; 3751 rlen += l; 3752 } 3753 3754 if (rlen == 0 && type == CONF_ACK) { 3755 if (debug) 3756 addlog(" send %s\n", sppp_cp_type_name(type)); 3757 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, origlen, h + 1); 3758 } else { 3759 #ifdef notdef 3760 if (type == CONF_ACK) 3761 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3762 #endif 3763 3764 if (debug) { 3765 addlog(" send %s suggest %s\n", 3766 sppp_cp_type_name(type), IN6_PRINT(ip6buf, &suggestaddr)); 3767 } 3768 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3769 } 3770 3771 end: 3772 free(buf, M_TEMP); 3773 return (rlen == 0); 3774 3775 drop: 3776 free(buf, M_TEMP); 3777 return -1; 3778 } 3779 3780 /* 3781 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3782 * negotiation. 3783 */ 3784 static void 3785 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3786 { 3787 u_char *buf, *p, l, blen; 3788 struct ifnet *ifp = &sp->pp_if; 3789 int debug = ifp->if_flags & IFF_DEBUG; 3790 3791 KASSERT(sppp_locked(sp)); 3792 3793 len -= 4; 3794 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 3795 if (!buf) 3796 return; 3797 3798 if (debug) 3799 log(LOG_DEBUG, "%s: ipv6cp rej opts:", 3800 ifp->if_xname); 3801 3802 p = (void *)(h + 1); 3803 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3804 if (l > len) { 3805 /* XXX just RXJ? */ 3806 addlog("%s: received malicious IPCPv6 option, " 3807 "dropping\n", ifp->if_xname); 3808 goto drop; 3809 } 3810 if (debug) 3811 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3812 switch (*p) { 3813 case IPV6CP_OPT_IFID: 3814 /* 3815 * Peer doesn't grok address option. This is 3816 * bad. XXX Should we better give up here? 3817 */ 3818 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3819 break; 3820 #ifdef notyet 3821 case IPV6CP_OPT_COMPRESS: 3822 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3823 break; 3824 #endif 3825 } 3826 } 3827 if (debug) 3828 addlog("\n"); 3829 drop: 3830 free(buf, M_TEMP); 3831 return; 3832 } 3833 3834 /* 3835 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3836 * negotiation. 3837 */ 3838 static void 3839 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3840 { 3841 u_char *buf, *p, l, blen; 3842 struct ifnet *ifp = &sp->pp_if; 3843 int debug = ifp->if_flags & IFF_DEBUG; 3844 struct in6_addr suggestaddr; 3845 char ip6buf[INET6_ADDRSTRLEN]; 3846 3847 KASSERT(sppp_locked(sp)); 3848 3849 len -= 4; 3850 buf = malloc (blen = len, M_TEMP, M_NOWAIT); 3851 if (!buf) 3852 return; 3853 3854 if (debug) 3855 log(LOG_DEBUG, "%s: ipv6cp nak opts:", 3856 ifp->if_xname); 3857 3858 p = (void *)(h + 1); 3859 for (; len > 1 && (l = p[1]) != 0; len -= l, p += l) { 3860 if (l > len) { 3861 /* XXX just RXJ? */ 3862 addlog("%s: received malicious IPCPv6 option, " 3863 "dropping\n", ifp->if_xname); 3864 goto drop; 3865 } 3866 if (debug) 3867 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3868 switch (*p) { 3869 case IPV6CP_OPT_IFID: 3870 /* 3871 * Peer doesn't like our local ifid. See 3872 * if we can do something for him. We'll drop 3873 * him our address then. 3874 */ 3875 if (len < 10 || l != 10) 3876 break; 3877 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3878 suggestaddr.s6_addr16[0] = htons(0xfe80); 3879 (void)in6_setscope(&suggestaddr, &sp->pp_if, NULL); 3880 memcpy(&suggestaddr.s6_addr[8], &p[2], 8); 3881 3882 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3883 if (debug) 3884 addlog(" [suggestaddr %s]", 3885 IN6_PRINT(ip6buf, &suggestaddr)); 3886 #ifdef IPV6CP_MYIFID_DYN 3887 /* 3888 * When doing dynamic address assignment, 3889 * we accept his offer. 3890 */ 3891 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3892 struct in6_addr lastsuggest; 3893 /* 3894 * If <suggested myaddr from peer> equals to 3895 * <hisaddr we have suggested last time>, 3896 * we have a collision. generate new random 3897 * ifid. 3898 */ 3899 sppp_suggest_ip6_addr(&lastsuggest); 3900 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3901 lastsuggest)) { 3902 if (debug) 3903 addlog(" [random]"); 3904 sppp_gen_ip6_addr(sp, &suggestaddr); 3905 } 3906 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3907 if (debug) 3908 addlog(" [agree]"); 3909 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3910 } 3911 #else 3912 /* 3913 * Since we do not do dynamic address assignment, 3914 * we ignore it and thus continue to negotiate 3915 * our already existing value. This can possibly 3916 * go into infinite request-reject loop. 3917 * 3918 * This is not likely because we normally use 3919 * ifid based on MAC-address. 3920 * If you have no ethernet card on the node, too bad. 3921 * XXX should we use fail_counter? 3922 */ 3923 #endif 3924 break; 3925 #ifdef notyet 3926 case IPV6CP_OPT_COMPRESS: 3927 /* 3928 * Peer wants different compression parameters. 3929 */ 3930 break; 3931 #endif 3932 } 3933 } 3934 if (debug) 3935 addlog("\n"); 3936 drop: 3937 free(buf, M_TEMP); 3938 return; 3939 } 3940 3941 static void 3942 sppp_ipv6cp_tlu(struct sppp *sp) 3943 { 3944 KASSERT(sppp_locked(sp)); 3945 /* we are up - notify isdn daemon */ 3946 if (sp->pp_con) 3947 sp->pp_con(sp); 3948 } 3949 3950 static void 3951 sppp_ipv6cp_tld(struct sppp *sp) 3952 { 3953 } 3954 3955 static void 3956 sppp_ipv6cp_tls(struct sppp *sp) 3957 { 3958 KASSERT(sppp_locked(sp)); 3959 /* indicate to LCP that it must stay alive */ 3960 sp->lcp.protos |= (1 << IDX_IPV6CP); 3961 } 3962 3963 static void 3964 sppp_ipv6cp_tlf(struct sppp *sp) 3965 { 3966 KASSERT(sppp_locked(sp)); 3967 /* we no longer need LCP */ 3968 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3969 } 3970 3971 static void 3972 sppp_ipv6cp_scr(struct sppp *sp) 3973 { 3974 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3975 struct in6_addr ouraddr; 3976 int i = 0; 3977 3978 KASSERT(sppp_locked(sp)); 3979 3980 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3981 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3982 opt[i++] = IPV6CP_OPT_IFID; 3983 opt[i++] = 10; 3984 memcpy(&opt[i], &ouraddr.s6_addr[8], 8); 3985 i += 8; 3986 } 3987 3988 #ifdef notyet 3989 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 3990 opt[i++] = IPV6CP_OPT_COMPRESSION; 3991 opt[i++] = 4; 3992 opt[i++] = 0; /* TBD */ 3993 opt[i++] = 0; /* TBD */ 3994 /* variable length data may follow */ 3995 } 3996 #endif 3997 3998 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 3999 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 4000 } 4001 #else /*INET6*/ 4002 static void 4003 sppp_ipv6cp_init(struct sppp *sp) 4004 { 4005 } 4006 4007 static void 4008 sppp_ipv6cp_up(struct sppp *sp) 4009 { 4010 } 4011 4012 static void 4013 sppp_ipv6cp_down(struct sppp *sp) 4014 { 4015 } 4016 4017 static void 4018 sppp_ipv6cp_open(struct sppp *sp) 4019 { 4020 } 4021 4022 static void 4023 sppp_ipv6cp_close(struct sppp *sp) 4024 { 4025 } 4026 4027 static void 4028 sppp_ipv6cp_TO(void *sp) 4029 { 4030 } 4031 4032 static int 4033 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, 4034 int len) 4035 { 4036 return 0; 4037 } 4038 4039 static void 4040 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, 4041 int len) 4042 { 4043 } 4044 4045 static void 4046 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, 4047 int len) 4048 { 4049 } 4050 4051 static void 4052 sppp_ipv6cp_tlu(struct sppp *sp) 4053 { 4054 } 4055 4056 static void 4057 sppp_ipv6cp_tld(struct sppp *sp) 4058 { 4059 } 4060 4061 static void 4062 sppp_ipv6cp_tls(struct sppp *sp) 4063 { 4064 } 4065 4066 static void 4067 sppp_ipv6cp_tlf(struct sppp *sp) 4068 { 4069 } 4070 4071 static void 4072 sppp_ipv6cp_scr(struct sppp *sp) 4073 { 4074 } 4075 #endif /*INET6*/ 4076 4077 4078 /* 4079 *--------------------------------------------------------------------------* 4080 * * 4081 * The CHAP implementation. * 4082 * * 4083 *--------------------------------------------------------------------------* 4084 */ 4085 4086 /* 4087 * The authentication protocols don't employ a full-fledged state machine as 4088 * the control protocols do, since they do have Open and Close events, but 4089 * not Up and Down, nor are they explicitly terminated. Also, use of the 4090 * authentication protocols may be different in both directions (this makes 4091 * sense, think of a machine that never accepts incoming calls but only 4092 * calls out, it doesn't require the called party to authenticate itself). 4093 * 4094 * Our state machine for the local authentication protocol (we are requesting 4095 * the peer to authenticate) looks like: 4096 * 4097 * RCA- 4098 * +--------------------------------------------+ 4099 * V scn,tld| 4100 * +--------+ Close +---------+ RCA+ 4101 * | |<----------------------------------| |------+ 4102 * +--->| Closed | TO* | Opened | sca | 4103 * | | |-----+ +-------| |<-----+ 4104 * | +--------+ irc | | +---------+ 4105 * | ^ | | ^ 4106 * | | | | | 4107 * | | | | | 4108 * | TO-| | | | 4109 * | |tld TO+ V | | 4110 * | | +------->+ | | 4111 * | | | | | | 4112 * | +--------+ V | | 4113 * | | |<----+<--------------------+ | 4114 * | | Req- | scr | 4115 * | | Sent | | 4116 * | | | | 4117 * | +--------+ | 4118 * | RCA- | | RCA+ | 4119 * +------+ +------------------------------------------+ 4120 * scn,tld sca,irc,ict,tlu 4121 * 4122 * 4123 * with: 4124 * 4125 * Open: LCP reached authentication phase 4126 * Close: LCP reached terminate phase 4127 * 4128 * RCA+: received reply (pap-req, chap-response), acceptable 4129 * RCN: received reply (pap-req, chap-response), not acceptable 4130 * TO+: timeout with restart counter >= 0 4131 * TO-: timeout with restart counter < 0 4132 * TO*: reschedule timeout for CHAP 4133 * 4134 * scr: send request packet (none for PAP, chap-challenge) 4135 * sca: send ack packet (pap-ack, chap-success) 4136 * scn: send nak packet (pap-nak, chap-failure) 4137 * ict: initialize re-challenge timer (CHAP only) 4138 * 4139 * tlu: this-layer-up, LCP reaches network phase 4140 * tld: this-layer-down, LCP enters terminate phase 4141 * 4142 * Note that in CHAP mode, after sending a new challenge, while the state 4143 * automaton falls back into Req-Sent state, it doesn't signal a tld 4144 * event to LCP, so LCP remains in network phase. Only after not getting 4145 * any response (or after getting an unacceptable response), CHAP closes, 4146 * causing LCP to enter terminate phase. 4147 * 4148 * With PAP, there is no initial request that can be sent. The peer is 4149 * expected to send one based on the successful negotiation of PAP as 4150 * the authentication protocol during the LCP option negotiation. 4151 * 4152 * Incoming authentication protocol requests (remote requests 4153 * authentication, we are peer) don't employ a state machine at all, 4154 * they are simply answered. Some peers [Ascend P50 firmware rev 4155 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 4156 * still in authentication phase (thereby violating the standard that 4157 * demands that these NCP packets are to be discarded), so we keep 4158 * track of the peer demanding us to authenticate, and only proceed to 4159 * phase network once we've seen a positive acknowledge for the 4160 * authentication. 4161 */ 4162 4163 /* 4164 * Handle incoming CHAP packets. 4165 */ 4166 void 4167 sppp_chap_input(struct sppp *sp, struct mbuf *m) 4168 { 4169 STDDCL; 4170 struct lcp_header *h; 4171 int len, x; 4172 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 4173 int value_len, name_len; 4174 MD5_CTX ctx; 4175 4176 KASSERT(!sppp_locked(sp)); 4177 4178 len = m->m_pkthdr.len; 4179 if (len < 4) { 4180 if (debug) 4181 log(LOG_DEBUG, 4182 "%s: chap invalid packet length: %d bytes\n", 4183 ifp->if_xname, len); 4184 return; 4185 } 4186 h = mtod(m, struct lcp_header *); 4187 if (len > ntohs(h->len)) 4188 len = ntohs(h->len); 4189 4190 switch (h->type) { 4191 /* challenge, failure and success are his authproto */ 4192 case CHAP_CHALLENGE: 4193 sppp_lock_enter(sp); 4194 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4195 /* can't do anything useful */ 4196 sp->pp_auth_failures++; 4197 printf("%s: chap input without my name and my secret being set\n", 4198 ifp->if_xname); 4199 sppp_lock_exit(sp); 4200 break; 4201 } 4202 value = 1 + (u_char *)(h + 1); 4203 value_len = value[-1]; 4204 name = value + value_len; 4205 name_len = len - value_len - 5; 4206 if (name_len < 0) { 4207 if (debug) { 4208 log(LOG_DEBUG, 4209 "%s: chap corrupted challenge " 4210 "<%s id=0x%x len=%d", 4211 ifp->if_xname, 4212 sppp_auth_type_name(PPP_CHAP, h->type), 4213 h->ident, ntohs(h->len)); 4214 if (len > 4) 4215 sppp_print_bytes((u_char *)(h + 1), 4216 len - 4); 4217 addlog(">\n"); 4218 } 4219 sppp_lock_exit(sp); 4220 break; 4221 } 4222 4223 if (debug) { 4224 log(LOG_DEBUG, 4225 "%s: chap input <%s id=0x%x len=%d name=", 4226 ifp->if_xname, 4227 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 4228 ntohs(h->len)); 4229 sppp_print_string((char *) name, name_len); 4230 addlog(" value-size=%d value=", value_len); 4231 sppp_print_bytes(value, value_len); 4232 addlog(">\n"); 4233 } 4234 4235 /* Compute reply value. */ 4236 MD5Init(&ctx); 4237 MD5Update(&ctx, &h->ident, 1); 4238 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 4239 MD5Update(&ctx, value, value_len); 4240 MD5Final(digest, &ctx); 4241 dsize = sizeof digest; 4242 4243 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 4244 sizeof dsize, (const char *)&dsize, 4245 sizeof digest, digest, 4246 sp->myauth.name_len, 4247 sp->myauth.name, 4248 0); 4249 sppp_lock_exit(sp); 4250 break; 4251 4252 case CHAP_SUCCESS: 4253 sppp_lock_enter(sp); 4254 if (debug) { 4255 log(LOG_DEBUG, "%s: chap success", 4256 ifp->if_xname); 4257 if (len > 4) { 4258 addlog(": "); 4259 sppp_print_string((char *)(h + 1), len - 4); 4260 } 4261 addlog("\n"); 4262 } 4263 x = splnet(); 4264 sp->pp_auth_failures = 0; 4265 sp->pp_flags &= ~PP_NEEDAUTH; 4266 if (sp->myauth.proto == PPP_CHAP && 4267 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4268 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 4269 /* 4270 * We are authenticator for CHAP but didn't 4271 * complete yet. Leave it to tlu to proceed 4272 * to network phase. 4273 */ 4274 splx(x); 4275 sppp_lock_exit(sp); 4276 break; 4277 } 4278 splx(x); 4279 sppp_phase_network(sp); 4280 sppp_lock_exit(sp); 4281 break; 4282 4283 case CHAP_FAILURE: 4284 x = splnet(); 4285 sppp_lock_enter(sp); 4286 sp->pp_auth_failures++; 4287 splx(x); 4288 if (debug) { 4289 log(LOG_INFO, "%s: chap failure", 4290 ifp->if_xname); 4291 if (len > 4) { 4292 addlog(": "); 4293 sppp_print_string((char *)(h + 1), len - 4); 4294 } 4295 addlog("\n"); 4296 } else 4297 log(LOG_INFO, "%s: chap failure\n", 4298 ifp->if_xname); 4299 sppp_lock_exit(sp); 4300 /* await LCP shutdown by authenticator */ 4301 break; 4302 4303 /* response is my authproto */ 4304 case CHAP_RESPONSE: 4305 sppp_lock_enter(sp); 4306 if (sp->hisauth.secret == NULL) { 4307 /* can't do anything useful */ 4308 printf("%s: chap input without his secret being set\n", 4309 ifp->if_xname); 4310 sppp_lock_exit(sp); 4311 break; 4312 } 4313 value = 1 + (u_char *)(h + 1); 4314 value_len = value[-1]; 4315 name = value + value_len; 4316 name_len = len - value_len - 5; 4317 if (name_len < 0) { 4318 if (debug) { 4319 log(LOG_DEBUG, 4320 "%s: chap corrupted response " 4321 "<%s id=0x%x len=%d", 4322 ifp->if_xname, 4323 sppp_auth_type_name(PPP_CHAP, h->type), 4324 h->ident, ntohs(h->len)); 4325 if (len > 4) 4326 sppp_print_bytes((u_char *)(h + 1), 4327 len - 4); 4328 addlog(">\n"); 4329 } 4330 sppp_lock_exit(sp); 4331 break; 4332 } 4333 if (h->ident != sp->confid[IDX_CHAP]) { 4334 if (debug) 4335 log(LOG_DEBUG, 4336 "%s: chap dropping response for old ID " 4337 "(got %d, expected %d)\n", 4338 ifp->if_xname, 4339 h->ident, sp->confid[IDX_CHAP]); 4340 sppp_lock_exit(sp); 4341 break; 4342 } 4343 if (sp->hisauth.name != NULL && 4344 (name_len != sp->hisauth.name_len 4345 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 4346 log(LOG_INFO, "%s: chap response, his name ", 4347 ifp->if_xname); 4348 sppp_print_string(name, name_len); 4349 addlog(" != expected "); 4350 sppp_print_string(sp->hisauth.name, 4351 sp->hisauth.name_len); 4352 addlog("\n"); 4353 goto chap_failure; 4354 } 4355 if (debug) { 4356 log(LOG_DEBUG, "%s: chap input(%s) " 4357 "<%s id=0x%x len=%d name=", 4358 ifp->if_xname, 4359 sppp_state_name(sp->state[IDX_CHAP]), 4360 sppp_auth_type_name(PPP_CHAP, h->type), 4361 h->ident, ntohs(h->len)); 4362 sppp_print_string((char *)name, name_len); 4363 addlog(" value-size=%d value=", value_len); 4364 sppp_print_bytes(value, value_len); 4365 addlog(">\n"); 4366 } 4367 if (value_len != sizeof(sp->myauth.challenge)) { 4368 if (debug) 4369 log(LOG_DEBUG, 4370 "%s: chap bad hash value length: " 4371 "%d bytes, should be %ld\n", 4372 ifp->if_xname, value_len, 4373 (long) sizeof(sp->myauth.challenge)); 4374 goto chap_failure; 4375 } 4376 4377 MD5Init(&ctx); 4378 MD5Update(&ctx, &h->ident, 1); 4379 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 4380 MD5Update(&ctx, sp->myauth.challenge, sizeof(sp->myauth.challenge)); 4381 MD5Final(digest, &ctx); 4382 4383 #define FAILMSG "Failed..." 4384 #define SUCCMSG "Welcome!" 4385 4386 if (value_len != sizeof digest || 4387 memcmp(digest, value, value_len) != 0) { 4388 chap_failure: 4389 KASSERT(sppp_locked(sp)); 4390 /* action scn, tld */ 4391 x = splnet(); 4392 sp->pp_auth_failures++; 4393 splx(x); 4394 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 4395 sizeof(FAILMSG) - 1, (const u_char *)FAILMSG, 4396 0); 4397 chap.tld(sp); 4398 sppp_lock_exit(sp); 4399 break; 4400 } 4401 sp->pp_auth_failures = 0; 4402 /* action sca, perhaps tlu */ 4403 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 4404 sp->state[IDX_CHAP] == STATE_OPENED) 4405 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 4406 sizeof(SUCCMSG) - 1, (const u_char *)SUCCMSG, 4407 0); 4408 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 4409 sppp_cp_change_state(&chap, sp, STATE_OPENED); 4410 chap.tlu(sp); 4411 } 4412 sppp_lock_exit(sp); 4413 break; 4414 4415 default: 4416 /* Unknown CHAP packet type -- ignore. */ 4417 sppp_lock_enter(sp); 4418 if (debug) { 4419 log(LOG_DEBUG, "%s: chap unknown input(%s) " 4420 "<0x%x id=0x%xh len=%d", 4421 ifp->if_xname, 4422 sppp_state_name(sp->state[IDX_CHAP]), 4423 h->type, h->ident, ntohs(h->len)); 4424 if (len > 4) 4425 sppp_print_bytes((u_char *)(h + 1), len - 4); 4426 addlog(">\n"); 4427 } 4428 sppp_lock_exit(sp); 4429 break; 4430 4431 } 4432 } 4433 4434 void 4435 sppp_lock_enter(struct sppp *sp) 4436 { 4437 if (sp->pp_lock) 4438 mutex_enter(sp->pp_lock); 4439 } 4440 4441 void 4442 sppp_lock_exit(struct sppp *sp) 4443 { 4444 if (sp->pp_lock) 4445 mutex_exit(sp->pp_lock); 4446 } 4447 4448 int 4449 sppp_locked(struct sppp *sp) 4450 { 4451 return (!(sp->pp_lock) || mutex_owned(sp->pp_lock)); 4452 } 4453 4454 static void 4455 sppp_chap_init(struct sppp *sp) 4456 { 4457 sppp_lock_enter(sp); 4458 /* Chap doesn't have STATE_INITIAL at all. */ 4459 sp->state[IDX_CHAP] = STATE_CLOSED; 4460 sp->fail_counter[IDX_CHAP] = 0; 4461 sp->pp_seq[IDX_CHAP] = 0; 4462 sp->pp_rseq[IDX_CHAP] = 0; 4463 callout_init(&sp->ch[IDX_CHAP], 0); 4464 sppp_lock_exit(sp); 4465 } 4466 4467 static void 4468 sppp_chap_open(struct sppp *sp) 4469 { 4470 KASSERT(sppp_locked(sp)); 4471 if (sp->hisauth.proto == PPP_CHAP && 4472 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4473 /* we are authenticator for CHAP, start it */ 4474 chap.scr(sp); 4475 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4476 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4477 } 4478 /* nothing to be done if we are peer, await a challenge */ 4479 } 4480 4481 static void 4482 sppp_chap_close(struct sppp *sp) 4483 { 4484 KASSERT(sppp_locked(sp)); 4485 4486 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4487 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4488 } 4489 4490 static void 4491 sppp_chap_TO(void *cookie) 4492 { 4493 struct sppp *sp = (struct sppp *)cookie; 4494 STDDCL; 4495 int s; 4496 4497 KASSERT(!sppp_locked(sp)); 4498 4499 s = splnet(); 4500 sppp_lock_enter(sp); 4501 4502 if (debug) 4503 log(LOG_DEBUG, "%s: chap TO(%s) rst_counter = %d\n", 4504 ifp->if_xname, 4505 sppp_state_name(sp->state[IDX_CHAP]), 4506 sp->rst_counter[IDX_CHAP]); 4507 4508 if (--sp->rst_counter[IDX_CHAP] < 0) 4509 /* TO- event */ 4510 switch (sp->state[IDX_CHAP]) { 4511 case STATE_REQ_SENT: 4512 chap.tld(sp); 4513 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4514 break; 4515 } 4516 else 4517 /* TO+ (or TO*) event */ 4518 switch (sp->state[IDX_CHAP]) { 4519 case STATE_OPENED: 4520 /* TO* event */ 4521 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4522 /* fall through */ 4523 case STATE_REQ_SENT: 4524 chap.scr(sp); 4525 /* sppp_cp_change_state() will restart the timer */ 4526 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4527 break; 4528 } 4529 4530 sppp_lock_exit(sp); 4531 splx(s); 4532 } 4533 4534 static void 4535 sppp_chap_tlu(struct sppp *sp) 4536 { 4537 STDDCL; 4538 int i, x; 4539 4540 KASSERT(sppp_locked(sp)); 4541 i = 0; 4542 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4543 4544 /* 4545 * Some broken CHAP implementations (Conware CoNet, firmware 4546 * 4.0.?) don't want to re-authenticate their CHAP once the 4547 * initial challenge-response exchange has taken place. 4548 * Provide for an option to avoid rechallenges. 4549 */ 4550 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4551 /* 4552 * Compute the re-challenge timeout. This will yield 4553 * a number between 300 and 810 seconds. 4554 */ 4555 i = 300 + ((unsigned)(cprng_fast32() & 0xff00) >> 7); 4556 4557 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4558 } 4559 4560 if (debug) { 4561 log(LOG_DEBUG, 4562 "%s: chap %s, ", 4563 ifp->if_xname, 4564 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu"); 4565 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) 4566 addlog("next re-challenge in %d seconds\n", i); 4567 else 4568 addlog("re-challenging supressed\n"); 4569 } 4570 4571 x = splnet(); 4572 sp->pp_auth_failures = 0; 4573 /* indicate to LCP that we need to be closed down */ 4574 sp->lcp.protos |= (1 << IDX_CHAP); 4575 4576 if (sp->pp_flags & PP_NEEDAUTH) { 4577 /* 4578 * Remote is authenticator, but his auth proto didn't 4579 * complete yet. Defer the transition to network 4580 * phase. 4581 */ 4582 splx(x); 4583 return; 4584 } 4585 splx(x); 4586 4587 /* 4588 * If we are already in phase network, we are done here. This 4589 * is the case if this is a dummy tlu event after a re-challenge. 4590 */ 4591 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4592 sppp_phase_network(sp); 4593 } 4594 4595 static void 4596 sppp_chap_tld(struct sppp *sp) 4597 { 4598 STDDCL; 4599 4600 KASSERT(sppp_locked(sp)); 4601 4602 if (debug) 4603 log(LOG_DEBUG, "%s: chap tld\n", ifp->if_xname); 4604 callout_stop(&sp->ch[IDX_CHAP]); 4605 sp->lcp.protos &= ~(1 << IDX_CHAP); 4606 4607 lcp.Close(sp); 4608 } 4609 4610 static void 4611 sppp_chap_scr(struct sppp *sp) 4612 { 4613 uint32_t *ch; 4614 u_char clen = 4 * sizeof(uint32_t); 4615 4616 KASSERT(sppp_locked(sp)); 4617 4618 if (sp->hisauth.name == NULL) { 4619 /* can't do anything useful */ 4620 printf("%s: chap starting without my name being set\n", 4621 sp->pp_if.if_xname); 4622 return; 4623 } 4624 4625 /* Compute random challenge. */ 4626 ch = (uint32_t *)sp->myauth.challenge; 4627 cprng_strong(kern_cprng, ch, clen, 0); 4628 4629 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4630 4631 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4632 sizeof clen, (const char *)&clen, 4633 sizeof(sp->myauth.challenge), sp->myauth.challenge, 4634 sp->myauth.name_len, 4635 sp->myauth.name, 4636 0); 4637 } 4638 4639 /* 4640 *--------------------------------------------------------------------------* 4641 * * 4642 * The PAP implementation. * 4643 * * 4644 *--------------------------------------------------------------------------* 4645 */ 4646 /* 4647 * For PAP, we need to keep a little state also if we are the peer, not the 4648 * authenticator. This is since we don't get a request to authenticate, but 4649 * have to repeatedly authenticate ourself until we got a response (or the 4650 * retry counter is expired). 4651 */ 4652 4653 /* 4654 * Handle incoming PAP packets. */ 4655 static void 4656 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4657 { 4658 STDDCL; 4659 struct lcp_header *h; 4660 int len, x; 4661 u_char mlen; 4662 char *name, *secret; 4663 int name_len, secret_len; 4664 4665 KASSERT(!sppp_locked(sp)); 4666 4667 /* 4668 * Malicious input might leave this uninitialized, so 4669 * init to an impossible value. 4670 */ 4671 secret_len = -1; 4672 4673 len = m->m_pkthdr.len; 4674 if (len < 5) { 4675 if (debug) 4676 log(LOG_DEBUG, 4677 "%s: pap invalid packet length: %d bytes\n", 4678 ifp->if_xname, len); 4679 return; 4680 } 4681 h = mtod(m, struct lcp_header *); 4682 if (len > ntohs(h->len)) 4683 len = ntohs(h->len); 4684 switch (h->type) { 4685 /* PAP request is my authproto */ 4686 case PAP_REQ: 4687 sppp_lock_enter(sp); 4688 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4689 /* can't do anything useful */ 4690 printf("%s: " 4691 "pap request without his name and his secret being set\n", 4692 ifp->if_xname); 4693 sppp_lock_exit(sp); 4694 break; 4695 } 4696 name = 1 + (u_char *)(h + 1); 4697 name_len = name[-1]; 4698 secret = name + name_len + 1; 4699 if (name_len > len - 6 || 4700 (secret_len = secret[-1]) > len - 6 - name_len) { 4701 if (debug) { 4702 log(LOG_DEBUG, "%s: pap corrupted input " 4703 "<%s id=0x%x len=%d", 4704 ifp->if_xname, 4705 sppp_auth_type_name(PPP_PAP, h->type), 4706 h->ident, ntohs(h->len)); 4707 if (len > 4) 4708 sppp_print_bytes((u_char *)(h + 1), 4709 len - 4); 4710 addlog(">\n"); 4711 } 4712 sppp_lock_exit(sp); 4713 break; 4714 } 4715 if (debug) { 4716 log(LOG_DEBUG, "%s: pap input(%s) " 4717 "<%s id=0x%x len=%d name=", 4718 ifp->if_xname, 4719 sppp_state_name(sp->state[IDX_PAP]), 4720 sppp_auth_type_name(PPP_PAP, h->type), 4721 h->ident, ntohs(h->len)); 4722 sppp_print_string((char *)name, name_len); 4723 addlog(" secret="); 4724 sppp_print_string((char *)secret, secret_len); 4725 addlog(">\n"); 4726 } 4727 if (name_len != sp->hisauth.name_len || 4728 secret_len != sp->hisauth.secret_len || 4729 memcmp(name, sp->hisauth.name, name_len) != 0 || 4730 memcmp(secret, sp->hisauth.secret, secret_len) != 0) { 4731 /* action scn, tld */ 4732 sp->pp_auth_failures++; 4733 mlen = sizeof(FAILMSG) - 1; 4734 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4735 sizeof mlen, (const char *)&mlen, 4736 sizeof(FAILMSG) - 1, (const u_char *)FAILMSG, 4737 0); 4738 pap.tld(sp); 4739 sppp_lock_exit(sp); 4740 break; 4741 } 4742 /* action sca, perhaps tlu */ 4743 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4744 sp->state[IDX_PAP] == STATE_OPENED) { 4745 mlen = sizeof(SUCCMSG) - 1; 4746 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4747 sizeof mlen, (const char *)&mlen, 4748 sizeof(SUCCMSG) - 1, (const u_char *)SUCCMSG, 4749 0); 4750 } 4751 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4752 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4753 pap.tlu(sp); 4754 } 4755 sppp_lock_exit(sp); 4756 break; 4757 4758 /* ack and nak are his authproto */ 4759 case PAP_ACK: 4760 sppp_lock_enter(sp); 4761 callout_stop(&sp->pap_my_to_ch); 4762 if (debug) { 4763 log(LOG_DEBUG, "%s: pap success", 4764 ifp->if_xname); 4765 name = 1 + (u_char *)(h + 1); 4766 name_len = name[-1]; 4767 if (len > 5 && name_len < len+4) { 4768 addlog(": "); 4769 sppp_print_string(name, name_len); 4770 } 4771 addlog("\n"); 4772 } 4773 x = splnet(); 4774 sp->pp_auth_failures = 0; 4775 sp->pp_flags &= ~PP_NEEDAUTH; 4776 if (sp->myauth.proto == PPP_PAP && 4777 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4778 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4779 /* 4780 * We are authenticator for PAP but didn't 4781 * complete yet. Leave it to tlu to proceed 4782 * to network phase. 4783 */ 4784 splx(x); 4785 sppp_lock_exit(sp); 4786 break; 4787 } 4788 splx(x); 4789 sppp_phase_network(sp); 4790 sppp_lock_exit(sp); 4791 break; 4792 4793 case PAP_NAK: 4794 sppp_lock_enter(sp); 4795 callout_stop(&sp->pap_my_to_ch); 4796 sp->pp_auth_failures++; 4797 if (debug) { 4798 log(LOG_INFO, "%s: pap failure", 4799 ifp->if_xname); 4800 name = 1 + (u_char *)(h + 1); 4801 name_len = name[-1]; 4802 if (len > 5 && name_len < len+4) { 4803 addlog(": "); 4804 sppp_print_string(name, name_len); 4805 } 4806 addlog("\n"); 4807 } else 4808 log(LOG_INFO, "%s: pap failure\n", 4809 ifp->if_xname); 4810 /* await LCP shutdown by authenticator */ 4811 sppp_lock_exit(sp); 4812 break; 4813 4814 default: 4815 /* Unknown PAP packet type -- ignore. */ 4816 sppp_lock_enter(sp); 4817 if (debug) { 4818 log(LOG_DEBUG, "%s: pap corrupted input " 4819 "<0x%x id=0x%x len=%d", 4820 ifp->if_xname, 4821 h->type, h->ident, ntohs(h->len)); 4822 if (len > 4) 4823 sppp_print_bytes((u_char *)(h + 1), len - 4); 4824 addlog(">\n"); 4825 } 4826 sppp_lock_exit(sp); 4827 break; 4828 4829 } 4830 } 4831 4832 static void 4833 sppp_pap_init(struct sppp *sp) 4834 { 4835 /* PAP doesn't have STATE_INITIAL at all. */ 4836 sppp_lock_enter(sp); 4837 sp->state[IDX_PAP] = STATE_CLOSED; 4838 sp->fail_counter[IDX_PAP] = 0; 4839 sp->pp_seq[IDX_PAP] = 0; 4840 sp->pp_rseq[IDX_PAP] = 0; 4841 callout_init(&sp->ch[IDX_PAP], 0); 4842 callout_init(&sp->pap_my_to_ch, 0); 4843 sppp_lock_exit(sp); 4844 } 4845 4846 static void 4847 sppp_pap_open(struct sppp *sp) 4848 { 4849 KASSERT(sppp_locked(sp)); 4850 4851 if (sp->hisauth.proto == PPP_PAP && 4852 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4853 /* we are authenticator for PAP, start our timer */ 4854 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4855 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4856 } 4857 if (sp->myauth.proto == PPP_PAP) { 4858 /* we are peer, send a request, and start a timer */ 4859 pap.scr(sp); 4860 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4861 sppp_pap_my_TO, sp); 4862 } 4863 } 4864 4865 static void 4866 sppp_pap_close(struct sppp *sp) 4867 { 4868 KASSERT(sppp_locked(sp)); 4869 if (sp->state[IDX_PAP] != STATE_CLOSED) 4870 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4871 } 4872 4873 /* 4874 * That's the timeout routine if we are authenticator. Since the 4875 * authenticator is basically passive in PAP, we can't do much here. 4876 */ 4877 static void 4878 sppp_pap_TO(void *cookie) 4879 { 4880 struct sppp *sp = (struct sppp *)cookie; 4881 STDDCL; 4882 int s; 4883 4884 KASSERT(!sppp_locked(sp)); 4885 4886 s = splnet(); 4887 sppp_lock_enter(sp); 4888 if (debug) 4889 log(LOG_DEBUG, "%s: pap TO(%s) rst_counter = %d\n", 4890 ifp->if_xname, 4891 sppp_state_name(sp->state[IDX_PAP]), 4892 sp->rst_counter[IDX_PAP]); 4893 4894 if (--sp->rst_counter[IDX_PAP] < 0) 4895 /* TO- event */ 4896 switch (sp->state[IDX_PAP]) { 4897 case STATE_REQ_SENT: 4898 pap.tld(sp); 4899 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4900 break; 4901 } 4902 else 4903 /* TO+ event, not very much we could do */ 4904 switch (sp->state[IDX_PAP]) { 4905 case STATE_REQ_SENT: 4906 /* sppp_cp_change_state() will restart the timer */ 4907 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4908 break; 4909 } 4910 4911 sppp_lock_exit(sp); 4912 splx(s); 4913 } 4914 4915 /* 4916 * That's the timeout handler if we are peer. Since the peer is active, 4917 * we need to retransmit our PAP request since it is apparently lost. 4918 * XXX We should impose a max counter. 4919 */ 4920 static void 4921 sppp_pap_my_TO(void *cookie) 4922 { 4923 struct sppp *sp = (struct sppp *)cookie; 4924 STDDCL; 4925 4926 KASSERT(!sppp_locked(sp)); 4927 4928 sppp_lock_enter(sp); 4929 if (debug) 4930 log(LOG_DEBUG, "%s: pap peer TO\n", 4931 ifp->if_xname); 4932 4933 pap.scr(sp); 4934 sppp_lock_exit(sp); 4935 } 4936 4937 static void 4938 sppp_pap_tlu(struct sppp *sp) 4939 { 4940 STDDCL; 4941 int x; 4942 4943 KASSERT(sppp_locked(sp)); 4944 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4945 4946 if (debug) 4947 log(LOG_DEBUG, "%s: %s tlu\n", 4948 ifp->if_xname, pap.name); 4949 4950 x = splnet(); 4951 sp->pp_auth_failures = 0; 4952 /* indicate to LCP that we need to be closed down */ 4953 sp->lcp.protos |= (1 << IDX_PAP); 4954 4955 if (sp->pp_flags & PP_NEEDAUTH) { 4956 /* 4957 * Remote is authenticator, but his auth proto didn't 4958 * complete yet. Defer the transition to network 4959 * phase. 4960 */ 4961 splx(x); 4962 return; 4963 } 4964 splx(x); 4965 sppp_phase_network(sp); 4966 } 4967 4968 static void 4969 sppp_pap_tld(struct sppp *sp) 4970 { 4971 STDDCL; 4972 4973 KASSERT(sppp_locked(sp)); 4974 4975 if (debug) 4976 log(LOG_DEBUG, "%s: pap tld\n", ifp->if_xname); 4977 callout_stop(&sp->ch[IDX_PAP]); 4978 callout_stop(&sp->pap_my_to_ch); 4979 sp->lcp.protos &= ~(1 << IDX_PAP); 4980 4981 lcp.Close(sp); 4982 } 4983 4984 static void 4985 sppp_pap_scr(struct sppp *sp) 4986 { 4987 u_char idlen, pwdlen; 4988 4989 KASSERT(sppp_locked(sp)); 4990 4991 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4992 /* can't do anything useful */ 4993 printf("%s: pap starting without my name and secret being set\n", 4994 sp->pp_if.if_xname); 4995 return; 4996 } 4997 4998 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4999 pwdlen = sp->myauth.secret_len; 5000 idlen = sp->myauth.name_len; 5001 5002 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 5003 sizeof idlen, (const char *)&idlen, 5004 idlen, sp->myauth.name, 5005 sizeof pwdlen, (const char *)&pwdlen, 5006 pwdlen, sp->myauth.secret, 5007 0); 5008 } 5009 5010 /* 5011 * Random miscellaneous functions. 5012 */ 5013 5014 /* 5015 * Send a PAP or CHAP proto packet. 5016 * 5017 * Varadic function, each of the elements for the ellipsis is of type 5018 * ``size_t mlen, const u_char *msg''. Processing will stop iff 5019 * mlen == 0. 5020 * NOTE: never declare variadic functions with types subject to type 5021 * promotion (i.e. u_char). This is asking for big trouble depending 5022 * on the architecture you are on... 5023 */ 5024 5025 static void 5026 sppp_auth_send(const struct cp *cp, struct sppp *sp, 5027 unsigned int type, unsigned int id, 5028 ...) 5029 { 5030 STDDCL; 5031 struct lcp_header *lh; 5032 struct mbuf *m; 5033 u_char *p; 5034 int len; 5035 size_t pkthdrlen; 5036 unsigned int mlen; 5037 const char *msg; 5038 va_list ap; 5039 5040 KASSERT(sppp_locked(sp)); 5041 5042 MGETHDR(m, M_DONTWAIT, MT_DATA); 5043 if (! m) 5044 return; 5045 m_reset_rcvif(m); 5046 5047 if (sp->pp_flags & PP_NOFRAMING) { 5048 *mtod(m, uint16_t *) = htons(cp->proto); 5049 pkthdrlen = 2; 5050 lh = (struct lcp_header *)(mtod(m, uint8_t *)+2); 5051 } else { 5052 struct ppp_header *h; 5053 h = mtod(m, struct ppp_header *); 5054 h->address = PPP_ALLSTATIONS; /* broadcast address */ 5055 h->control = PPP_UI; /* Unnumbered Info */ 5056 h->protocol = htons(cp->proto); 5057 pkthdrlen = PPP_HEADER_LEN; 5058 5059 lh = (struct lcp_header *)(h + 1); 5060 } 5061 5062 lh->type = type; 5063 lh->ident = id; 5064 p = (u_char *)(lh + 1); 5065 5066 va_start(ap, id); 5067 len = 0; 5068 5069 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 5070 msg = va_arg(ap, const char *); 5071 len += mlen; 5072 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 5073 va_end(ap); 5074 m_freem(m); 5075 return; 5076 } 5077 5078 memcpy(p, msg, mlen); 5079 p += mlen; 5080 } 5081 va_end(ap); 5082 5083 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 5084 lh->len = htons(LCP_HEADER_LEN + len); 5085 5086 if (debug) { 5087 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 5088 ifp->if_xname, cp->name, 5089 sppp_auth_type_name(cp->proto, lh->type), 5090 lh->ident, ntohs(lh->len)); 5091 if (len) 5092 sppp_print_bytes((u_char *)(lh + 1), len); 5093 addlog(">\n"); 5094 } 5095 if (IF_QFULL(&sp->pp_cpq)) { 5096 IF_DROP(&sp->pp_fastq); 5097 IF_DROP(&ifp->if_snd); 5098 m_freem(m); 5099 ++ifp->if_oerrors; 5100 return; 5101 } 5102 5103 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 5104 IF_ENQUEUE(&sp->pp_cpq, m); 5105 5106 if (! (ifp->if_flags & IFF_OACTIVE)) { 5107 sppp_lock_exit(sp); 5108 if_start_lock(ifp); 5109 sppp_lock_enter(sp); 5110 } 5111 } 5112 5113 /* 5114 * Send keepalive packets, every 10 seconds. 5115 */ 5116 static void 5117 sppp_keepalive(void *dummy) 5118 { 5119 struct sppp *sp; 5120 int s; 5121 time_t now; 5122 5123 SPPPQ_LOCK(); 5124 5125 s = splnet(); 5126 now = time_uptime; 5127 for (sp=spppq; sp; sp=sp->pp_next) { 5128 struct ifnet *ifp = NULL; 5129 5130 sppp_lock_enter(sp); 5131 ifp = &sp->pp_if; 5132 5133 /* check idle timeout */ 5134 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 5135 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 5136 /* idle timeout is enabled for this interface */ 5137 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 5138 if (ifp->if_flags & IFF_DEBUG) 5139 printf("%s: no activity for %lu seconds\n", 5140 sp->pp_if.if_xname, 5141 (unsigned long)(now-sp->pp_last_activity)); 5142 lcp.Close(sp); 5143 sppp_lock_exit(sp); 5144 continue; 5145 } 5146 } 5147 5148 /* Keepalive mode disabled or channel down? */ 5149 if (! (sp->pp_flags & PP_KEEPALIVE) || 5150 ! (ifp->if_flags & IFF_RUNNING)) { 5151 sppp_lock_exit(sp); 5152 continue; 5153 } 5154 5155 5156 /* No keepalive in PPP mode if LCP not opened yet. */ 5157 if (! (sp->pp_flags & PP_CISCO) && 5158 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) { 5159 sppp_lock_exit(sp); 5160 continue; 5161 } 5162 5163 /* No echo reply, but maybe user data passed through? */ 5164 if ((now - sp->pp_last_receive) < sp->pp_max_noreceive) { 5165 sp->pp_alivecnt = 0; 5166 sppp_lock_exit(sp); 5167 continue; 5168 } 5169 5170 if (sp->pp_alivecnt >= sp->pp_maxalive) { 5171 /* No keepalive packets got. Stop the interface. */ 5172 sppp_lock_exit(sp); 5173 if_down (ifp); 5174 sppp_lock_enter(sp); 5175 IF_PURGE(&sp->pp_cpq); 5176 if (! (sp->pp_flags & PP_CISCO)) { 5177 printf("%s: LCP keepalive timed out, going to restart the connection\n", 5178 ifp->if_xname); 5179 sp->pp_alivecnt = 0; 5180 5181 /* we are down, close all open protocols */ 5182 lcp.Close(sp); 5183 5184 /* And now prepare LCP to reestablish the link, if configured to do so. */ 5185 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 5186 5187 /* Close connection immediately, completition of this 5188 * will summon the magic needed to reestablish it. */ 5189 if (sp->pp_tlf) 5190 sp->pp_tlf(sp); 5191 5192 sppp_lock_exit(sp); 5193 continue; 5194 } 5195 } 5196 if (sp->pp_alivecnt < sp->pp_maxalive) 5197 ++sp->pp_alivecnt; 5198 if (sp->pp_flags & PP_CISCO) 5199 sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ, 5200 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 5201 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 5202 int32_t nmagic = htonl(sp->lcp.magic); 5203 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 5204 sppp_cp_send(sp, PPP_LCP, ECHO_REQ, 5205 sp->lcp.echoid, 4, &nmagic); 5206 } 5207 5208 sppp_lock_exit(sp); 5209 } 5210 splx(s); 5211 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 5212 5213 SPPPQ_UNLOCK(); 5214 } 5215 5216 #ifdef INET 5217 /* 5218 * Get both IP addresses. 5219 */ 5220 static void 5221 sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, uint32_t *srcmask) 5222 { 5223 struct ifnet *ifp = &sp->pp_if; 5224 struct ifaddr *ifa; 5225 struct sockaddr_in *si, *sm; 5226 uint32_t ssrc, ddst; 5227 5228 sm = NULL; 5229 ssrc = ddst = 0; 5230 /* 5231 * Pick the first AF_INET address from the list, 5232 * aliases don't make any sense on a p2p link anyway. 5233 */ 5234 si = 0; 5235 IFADDR_READER_FOREACH(ifa, ifp) { 5236 if (ifa->ifa_addr->sa_family == AF_INET) { 5237 si = (struct sockaddr_in *)ifa->ifa_addr; 5238 sm = (struct sockaddr_in *)ifa->ifa_netmask; 5239 if (si) 5240 break; 5241 } 5242 } 5243 if (ifa) { 5244 if (si && si->sin_addr.s_addr) { 5245 ssrc = si->sin_addr.s_addr; 5246 if (srcmask) 5247 *srcmask = ntohl(sm->sin_addr.s_addr); 5248 } 5249 5250 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 5251 if (si && si->sin_addr.s_addr) 5252 ddst = si->sin_addr.s_addr; 5253 } 5254 5255 if (dst) *dst = ntohl(ddst); 5256 if (src) *src = ntohl(ssrc); 5257 } 5258 5259 /* 5260 * Set IP addresses. Must be called at splnet. 5261 * If an address is 0, leave it the way it is. 5262 */ 5263 static void 5264 sppp_set_ip_addrs_work(struct work *wk, struct sppp *sp) 5265 { 5266 STDDCL; 5267 struct ifaddr *ifa; 5268 struct sockaddr_in *si, *dest; 5269 uint32_t myaddr = 0, hisaddr = 0; 5270 int s; 5271 5272 /* 5273 * Pick the first AF_INET address from the list, 5274 * aliases don't make any sense on a p2p link anyway. 5275 */ 5276 si = dest = NULL; 5277 s = pserialize_read_enter(); 5278 IFADDR_READER_FOREACH(ifa, ifp) { 5279 if (ifa->ifa_addr->sa_family == AF_INET) { 5280 si = (struct sockaddr_in *)ifa->ifa_addr; 5281 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5282 break; 5283 } 5284 } 5285 pserialize_read_exit(s); 5286 5287 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 5288 myaddr = sp->ipcp.req_myaddr; 5289 else if (si != NULL) 5290 myaddr = ntohl(si->sin_addr.s_addr); 5291 5292 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 5293 hisaddr = sp->ipcp.req_hisaddr; 5294 else if (dest != NULL) 5295 hisaddr = ntohl(dest->sin_addr.s_addr); 5296 5297 if (si != NULL && dest != NULL) { 5298 int error; 5299 struct sockaddr_in new_sin = *si; 5300 struct sockaddr_in new_dst = *dest; 5301 5302 if (myaddr != 0) 5303 new_sin.sin_addr.s_addr = htonl(myaddr); 5304 if (hisaddr != 0) { 5305 new_dst.sin_addr.s_addr = htonl(hisaddr); 5306 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) 5307 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 5308 } 5309 5310 in_addrhash_remove(ifatoia(ifa)); 5311 5312 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5313 5314 in_addrhash_insert(ifatoia(ifa)); 5315 5316 if (debug && error) 5317 { 5318 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5319 ifp->if_xname, __func__, error); 5320 } 5321 if (!error) { 5322 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5323 } 5324 } 5325 5326 if (ifp->if_mtu > sp->lcp.their_mru) { 5327 sp->pp_saved_mtu = ifp->if_mtu; 5328 ifp->if_mtu = sp->lcp.their_mru; 5329 if (debug) 5330 log(LOG_DEBUG, 5331 "%s: setting MTU to %" PRIu64 " bytes\n", 5332 ifp->if_xname, ifp->if_mtu); 5333 } 5334 5335 if (sp->pp_con) 5336 sp->pp_con(sp); 5337 } 5338 5339 static void 5340 sppp_set_ip_addrs(struct sppp *sp) 5341 { 5342 struct ifnet *ifp = &sp->pp_if; 5343 5344 if (!pcq_put(sp->ipcp.update_addrs_q, (void *)IPCP_SET_ADDRS)) { 5345 log(LOG_WARNING, "%s: cannot enqueued, ignore sppp_clear_ip_addrs\n", 5346 ifp->if_xname); 5347 return; 5348 } 5349 5350 if (atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1) == 1) 5351 return; 5352 5353 workqueue_enqueue(sp->ipcp.update_addrs_wq, &sp->ipcp.update_addrs_wk, NULL); 5354 } 5355 5356 /* 5357 * Clear IP addresses. Must be called at splnet. 5358 */ 5359 static void 5360 sppp_clear_ip_addrs_work(struct work *wk, struct sppp *sp) 5361 { 5362 STDDCL; 5363 struct ifaddr *ifa; 5364 struct sockaddr_in *si, *dest; 5365 int s; 5366 5367 /* 5368 * Pick the first AF_INET address from the list, 5369 * aliases don't make any sense on a p2p link anyway. 5370 */ 5371 si = dest = NULL; 5372 s = pserialize_read_enter(); 5373 IFADDR_READER_FOREACH(ifa, ifp) { 5374 if (ifa->ifa_addr->sa_family == AF_INET) { 5375 si = (struct sockaddr_in *)ifa->ifa_addr; 5376 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 5377 break; 5378 } 5379 } 5380 pserialize_read_exit(s); 5381 5382 if (si != NULL) { 5383 struct sockaddr_in new_sin = *si; 5384 struct sockaddr_in new_dst = *dest; 5385 int error; 5386 5387 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 5388 new_sin.sin_addr.s_addr = 0; 5389 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 5390 new_dst.sin_addr.s_addr = sp->ipcp.saved_hisaddr; 5391 5392 in_addrhash_remove(ifatoia(ifa)); 5393 5394 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, &new_dst, 0); 5395 5396 in_addrhash_insert(ifatoia(ifa)); 5397 5398 if (debug && error) 5399 { 5400 log(LOG_DEBUG, "%s: %s: in_ifinit failed, error=%d\n", 5401 ifp->if_xname, __func__, error); 5402 } 5403 if (!error) { 5404 pfil_run_addrhooks(if_pfil, SIOCAIFADDR, ifa); 5405 } 5406 } 5407 5408 if (sp->pp_saved_mtu > 0) { 5409 ifp->if_mtu = sp->pp_saved_mtu; 5410 sp->pp_saved_mtu = 0; 5411 if (debug) 5412 log(LOG_DEBUG, 5413 "%s: resetting MTU to %" PRIu64 " bytes\n", 5414 ifp->if_xname, ifp->if_mtu); 5415 } 5416 } 5417 5418 static void 5419 sppp_clear_ip_addrs(struct sppp *sp) 5420 { 5421 struct ifnet *ifp = &sp->pp_if; 5422 5423 if (!pcq_put(sp->ipcp.update_addrs_q, (void *)IPCP_CLEAR_ADDRS)) { 5424 log(LOG_WARNING, "%s: cannot enqueued, ignore sppp_clear_ip_addrs\n", 5425 ifp->if_xname); 5426 return; 5427 } 5428 5429 if (atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 1) == 1) 5430 return; 5431 5432 workqueue_enqueue(sp->ipcp.update_addrs_wq, &sp->ipcp.update_addrs_wk, NULL); 5433 } 5434 5435 static void 5436 sppp_update_ip_addrs_work(struct work *wk, void *arg) 5437 { 5438 struct sppp *sp = arg; 5439 void *work; 5440 5441 atomic_swap_uint(&sp->ipcp.update_addrs_enqueued, 0); 5442 5443 while ((work = pcq_get(sp->ipcp.update_addrs_q)) != NULL) { 5444 int update = (intptr_t)work; 5445 5446 if (update == IPCP_SET_ADDRS) 5447 sppp_set_ip_addrs_work(wk, sp); 5448 else if (update == IPCP_CLEAR_ADDRS) 5449 sppp_clear_ip_addrs_work(wk, sp); 5450 } 5451 } 5452 #endif 5453 5454 #ifdef INET6 5455 /* 5456 * Get both IPv6 addresses. 5457 */ 5458 static void 5459 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 5460 struct in6_addr *srcmask) 5461 { 5462 struct ifnet *ifp = &sp->pp_if; 5463 struct ifaddr *ifa; 5464 struct sockaddr_in6 *si, *sm; 5465 struct in6_addr ssrc, ddst; 5466 5467 sm = NULL; 5468 memset(&ssrc, 0, sizeof(ssrc)); 5469 memset(&ddst, 0, sizeof(ddst)); 5470 /* 5471 * Pick the first link-local AF_INET6 address from the list, 5472 * aliases don't make any sense on a p2p link anyway. 5473 */ 5474 si = 0; 5475 IFADDR_READER_FOREACH(ifa, ifp) 5476 if (ifa->ifa_addr->sa_family == AF_INET6) { 5477 si = (struct sockaddr_in6 *)ifa->ifa_addr; 5478 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 5479 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) 5480 break; 5481 } 5482 if (ifa) { 5483 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 5484 memcpy(&ssrc, &si->sin6_addr, sizeof(ssrc)); 5485 if (srcmask) { 5486 memcpy(srcmask, &sm->sin6_addr, 5487 sizeof(*srcmask)); 5488 } 5489 } 5490 5491 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 5492 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 5493 memcpy(&ddst, &si->sin6_addr, sizeof(ddst)); 5494 } 5495 5496 if (dst) 5497 memcpy(dst, &ddst, sizeof(*dst)); 5498 if (src) 5499 memcpy(src, &ssrc, sizeof(*src)); 5500 } 5501 5502 #ifdef IPV6CP_MYIFID_DYN 5503 /* 5504 * Generate random ifid. 5505 */ 5506 static void 5507 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 5508 { 5509 /* TBD */ 5510 } 5511 5512 /* 5513 * Set my IPv6 address. Must be called at splnet. 5514 */ 5515 static void 5516 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 5517 { 5518 STDDCL; 5519 struct ifaddr *ifa; 5520 struct sockaddr_in6 *sin6; 5521 5522 /* 5523 * Pick the first link-local AF_INET6 address from the list, 5524 * aliases don't make any sense on a p2p link anyway. 5525 */ 5526 5527 sin6 = NULL; 5528 IFADDR_READER_FOREACH(ifa, ifp) 5529 { 5530 if (ifa->ifa_addr->sa_family == AF_INET6) 5531 { 5532 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 5533 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 5534 break; 5535 } 5536 } 5537 5538 if (ifa && sin6) 5539 { 5540 int error; 5541 struct sockaddr_in6 new_sin6 = *sin6; 5542 5543 memcpy(&new_sin6.sin6_addr, src, sizeof(new_sin6.sin6_addr)); 5544 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 5545 if (debug && error) 5546 { 5547 log(LOG_DEBUG, "%s: %s: in6_ifinit failed, error=%d\n", 5548 ifp->if_xname, __func__, error); 5549 } 5550 if (!error) { 5551 pfil_run_addrhooks(if_pfil, SIOCAIFADDR_IN6, ifa); 5552 } 5553 } 5554 } 5555 #endif 5556 5557 /* 5558 * Suggest a candidate address to be used by peer. 5559 */ 5560 static void 5561 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 5562 { 5563 struct in6_addr myaddr; 5564 struct timeval tv; 5565 5566 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 5567 5568 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 5569 microtime(&tv); 5570 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 5571 myaddr.s6_addr[14] ^= 0xff; 5572 myaddr.s6_addr[15] ^= 0xff; 5573 } else { 5574 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 5575 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 5576 } 5577 if (suggest) 5578 memcpy(suggest, &myaddr, sizeof(myaddr)); 5579 } 5580 #endif /*INET6*/ 5581 5582 /* 5583 * Process ioctl requests specific to the PPP interface. 5584 * Permissions have already been checked. 5585 */ 5586 static int 5587 sppp_params(struct sppp *sp, u_long cmd, void *data) 5588 { 5589 switch (cmd) { 5590 case SPPPGETAUTHCFG: 5591 { 5592 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5593 int error; 5594 size_t len; 5595 5596 sppp_lock_enter(sp); 5597 5598 cfg->myauthflags = sp->myauth.flags; 5599 cfg->hisauthflags = sp->hisauth.flags; 5600 strlcpy(cfg->ifname, sp->pp_if.if_xname, sizeof(cfg->ifname)); 5601 cfg->hisauth = 0; 5602 if (sp->hisauth.proto) 5603 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5604 cfg->myauth = 0; 5605 if (sp->myauth.proto) 5606 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5607 if (cfg->myname_length == 0) { 5608 if (sp->myauth.name != NULL) 5609 cfg->myname_length = sp->myauth.name_len + 1; 5610 } else { 5611 if (sp->myauth.name == NULL) { 5612 cfg->myname_length = 0; 5613 } else { 5614 len = sp->myauth.name_len + 1; 5615 5616 sppp_lock_exit(sp); 5617 5618 if (cfg->myname_length < len) 5619 return (ENAMETOOLONG); 5620 error = copyout(sp->myauth.name, cfg->myname, len); 5621 if (error) return error; 5622 5623 sppp_lock_enter(sp); 5624 } 5625 } 5626 if (cfg->hisname_length == 0) { 5627 if (sp->hisauth.name != NULL) 5628 cfg->hisname_length = sp->hisauth.name_len + 1; 5629 } else { 5630 if (sp->hisauth.name == NULL) { 5631 cfg->hisname_length = 0; 5632 } else { 5633 len = sp->hisauth.name_len + 1; 5634 5635 sppp_lock_exit(sp); 5636 if (cfg->hisname_length < len) 5637 return (ENAMETOOLONG); 5638 error = copyout(sp->hisauth.name, cfg->hisname, len); 5639 if (error) return error; 5640 sppp_lock_enter(sp); 5641 } 5642 } 5643 sppp_lock_exit(sp); 5644 } 5645 break; 5646 case SPPPSETAUTHCFG: 5647 { 5648 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5649 int error; 5650 5651 sppp_lock_enter(sp); 5652 5653 if (sp->myauth.name) { 5654 free(sp->myauth.name, M_DEVBUF); 5655 sp->myauth.name = NULL; 5656 } 5657 if (sp->myauth.secret) { 5658 free(sp->myauth.secret, M_DEVBUF); 5659 sp->myauth.secret = NULL; 5660 } 5661 if (sp->hisauth.name) { 5662 free(sp->hisauth.name, M_DEVBUF); 5663 sp->hisauth.name = NULL; 5664 } 5665 if (sp->hisauth.secret) { 5666 free(sp->hisauth.secret, M_DEVBUF); 5667 sp->hisauth.secret = NULL; 5668 } 5669 5670 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5671 if (cfg->hisname_length >= MCLBYTES) { 5672 sppp_lock_exit(sp); 5673 return (ENAMETOOLONG); 5674 } 5675 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5676 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5677 if (error) { 5678 free(sp->hisauth.name, M_DEVBUF); 5679 sp->hisauth.name = NULL; 5680 sppp_lock_exit(sp); 5681 return error; 5682 } 5683 sp->hisauth.name_len = cfg->hisname_length - 1; 5684 sp->hisauth.name[sp->hisauth.name_len] = 0; 5685 } 5686 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5687 if (cfg->hissecret_length >= MCLBYTES) { 5688 sppp_lock_exit(sp); 5689 return (ENAMETOOLONG); 5690 } 5691 sp->hisauth.secret = malloc(cfg->hissecret_length, 5692 M_DEVBUF, M_WAITOK); 5693 error = copyin(cfg->hissecret, sp->hisauth.secret, 5694 cfg->hissecret_length); 5695 if (error) { 5696 free(sp->hisauth.secret, M_DEVBUF); 5697 sp->hisauth.secret = NULL; 5698 sppp_lock_exit(sp); 5699 return error; 5700 } 5701 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5702 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5703 } 5704 if (cfg->myname != NULL && cfg->myname_length > 0) { 5705 if (cfg->myname_length >= MCLBYTES) { 5706 sppp_lock_exit(sp); 5707 return (ENAMETOOLONG); 5708 } 5709 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5710 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5711 if (error) { 5712 free(sp->myauth.name, M_DEVBUF); 5713 sp->myauth.name = NULL; 5714 sppp_lock_exit(sp); 5715 return error; 5716 } 5717 sp->myauth.name_len = cfg->myname_length - 1; 5718 sp->myauth.name[sp->myauth.name_len] = 0; 5719 } 5720 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5721 if (cfg->mysecret_length >= MCLBYTES) { 5722 sppp_lock_exit(sp); 5723 return (ENAMETOOLONG); 5724 } 5725 sp->myauth.secret = malloc(cfg->mysecret_length, 5726 M_DEVBUF, M_WAITOK); 5727 error = copyin(cfg->mysecret, sp->myauth.secret, 5728 cfg->mysecret_length); 5729 if (error) { 5730 free(sp->myauth.secret, M_DEVBUF); 5731 sp->myauth.secret = NULL; 5732 sppp_lock_exit(sp); 5733 return error; 5734 } 5735 sp->myauth.secret_len = cfg->mysecret_length - 1; 5736 sp->myauth.secret[sp->myauth.secret_len] = 0; 5737 } 5738 sp->myauth.flags = cfg->myauthflags; 5739 if (cfg->myauth) 5740 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5741 sp->hisauth.flags = cfg->hisauthflags; 5742 if (cfg->hisauth) 5743 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5744 sp->pp_auth_failures = 0; 5745 if (sp->hisauth.proto != 0) 5746 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 5747 else 5748 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 5749 5750 sppp_lock_exit(sp); 5751 } 5752 break; 5753 case SPPPGETLCPCFG: 5754 { 5755 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5756 sppp_lock_enter(sp); 5757 lcpp->lcp_timeout = sp->lcp.timeout; 5758 sppp_lock_exit(sp); 5759 } 5760 break; 5761 case SPPPSETLCPCFG: 5762 { 5763 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5764 sppp_lock_enter(sp); 5765 sp->lcp.timeout = lcpp->lcp_timeout; 5766 sppp_lock_exit(sp); 5767 } 5768 break; 5769 case SPPPGETSTATUS: 5770 { 5771 struct spppstatus *status = (struct spppstatus *)data; 5772 sppp_lock_enter(sp); 5773 status->phase = sp->pp_phase; 5774 sppp_lock_exit(sp); 5775 } 5776 break; 5777 case SPPPGETSTATUSNCP: 5778 { 5779 struct spppstatusncp *status = (struct spppstatusncp *)data; 5780 sppp_lock_enter(sp); 5781 status->phase = sp->pp_phase; 5782 sppp_lock_exit(sp); 5783 status->ncpup = sppp_ncp_check(sp); 5784 } 5785 break; 5786 case SPPPGETIDLETO: 5787 { 5788 struct spppidletimeout *to = (struct spppidletimeout *)data; 5789 sppp_lock_enter(sp); 5790 to->idle_seconds = sp->pp_idle_timeout; 5791 sppp_lock_exit(sp); 5792 } 5793 break; 5794 case SPPPSETIDLETO: 5795 { 5796 struct spppidletimeout *to = (struct spppidletimeout *)data; 5797 sppp_lock_enter(sp); 5798 sp->pp_idle_timeout = to->idle_seconds; 5799 sppp_lock_exit(sp); 5800 } 5801 break; 5802 case SPPPSETAUTHFAILURE: 5803 { 5804 struct spppauthfailuresettings *afsettings = (struct spppauthfailuresettings *)data; 5805 sppp_lock_enter(sp); 5806 sp->pp_max_auth_fail = afsettings->max_failures; 5807 sp->pp_auth_failures = 0; 5808 sppp_lock_exit(sp); 5809 } 5810 break; 5811 case SPPPGETAUTHFAILURES: 5812 { 5813 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5814 sppp_lock_enter(sp); 5815 stats->auth_failures = sp->pp_auth_failures; 5816 stats->max_failures = sp->pp_max_auth_fail; 5817 sppp_lock_exit(sp); 5818 } 5819 break; 5820 case SPPPSETDNSOPTS: 5821 { 5822 struct spppdnssettings *req = (struct spppdnssettings *)data; 5823 sppp_lock_enter(sp); 5824 sp->query_dns = req->query_dns & 3; 5825 sppp_lock_exit(sp); 5826 } 5827 break; 5828 case SPPPGETDNSOPTS: 5829 { 5830 struct spppdnssettings *req = (struct spppdnssettings *)data; 5831 sppp_lock_enter(sp); 5832 req->query_dns = sp->query_dns; 5833 sppp_lock_exit(sp); 5834 } 5835 break; 5836 case SPPPGETDNSADDRS: 5837 { 5838 struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data; 5839 sppp_lock_enter(sp); 5840 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5841 sppp_lock_exit(sp); 5842 } 5843 break; 5844 case SPPPGETKEEPALIVE: 5845 { 5846 struct spppkeepalivesettings *settings = 5847 (struct spppkeepalivesettings*)data; 5848 sppp_lock_enter(sp); 5849 settings->maxalive = sp->pp_maxalive; 5850 settings->max_noreceive = sp->pp_max_noreceive; 5851 sppp_lock_exit(sp); 5852 } 5853 break; 5854 case SPPPSETKEEPALIVE: 5855 { 5856 struct spppkeepalivesettings *settings = 5857 (struct spppkeepalivesettings*)data; 5858 sppp_lock_enter(sp); 5859 sp->pp_maxalive = settings->maxalive; 5860 sp->pp_max_noreceive = settings->max_noreceive; 5861 sppp_lock_exit(sp); 5862 } 5863 break; 5864 #if defined(COMPAT_50) || defined(MODULAR) 5865 case __SPPPGETIDLETO50: 5866 { 5867 struct spppidletimeout50 *to = (struct spppidletimeout50 *)data; 5868 sppp_lock_enter(sp); 5869 to->idle_seconds = (uint32_t)sp->pp_idle_timeout; 5870 sppp_lock_exit(sp); 5871 } 5872 break; 5873 case __SPPPSETIDLETO50: 5874 { 5875 struct spppidletimeout50 *to = (struct spppidletimeout50 *)data; 5876 sppp_lock_enter(sp); 5877 sp->pp_idle_timeout = (time_t)to->idle_seconds; 5878 sppp_lock_exit(sp); 5879 } 5880 break; 5881 case __SPPPGETKEEPALIVE50: 5882 { 5883 struct spppkeepalivesettings50 *settings = 5884 (struct spppkeepalivesettings50*)data; 5885 sppp_lock_enter(sp); 5886 settings->maxalive = sp->pp_maxalive; 5887 settings->max_noreceive = (uint32_t)sp->pp_max_noreceive; 5888 sppp_lock_exit(sp); 5889 } 5890 break; 5891 case __SPPPSETKEEPALIVE50: 5892 { 5893 struct spppkeepalivesettings50 *settings = 5894 (struct spppkeepalivesettings50*)data; 5895 sppp_lock_enter(sp); 5896 sp->pp_maxalive = settings->maxalive; 5897 sp->pp_max_noreceive = (time_t)settings->max_noreceive; 5898 sppp_lock_exit(sp); 5899 } 5900 break; 5901 #endif /* COMPAT_50 || MODULAR */ 5902 default: 5903 return (EINVAL); 5904 } 5905 5906 return (0); 5907 } 5908 5909 static void 5910 sppp_phase_network(struct sppp *sp) 5911 { 5912 STDDCL; 5913 int i; 5914 uint32_t mask; 5915 5916 KASSERT(sppp_locked(sp)); 5917 5918 sppp_change_phase(sp, SPPP_PHASE_NETWORK); 5919 5920 /* Notify NCPs now. */ 5921 for (i = 0; i < IDX_COUNT; i++) 5922 if ((cps[i])->flags & CP_NCP) 5923 (cps[i])->Open(sp); 5924 5925 /* Send Up events to all NCPs. */ 5926 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5927 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) { 5928 (cps[i])->Up(sp); 5929 } 5930 5931 /* if no NCP is starting, all this was in vain, close down */ 5932 sppp_lcp_check_and_close(sp); 5933 } 5934 5935 5936 static const char * 5937 sppp_cp_type_name(u_char type) 5938 { 5939 static char buf[12]; 5940 switch (type) { 5941 case CONF_REQ: return "conf-req"; 5942 case CONF_ACK: return "conf-ack"; 5943 case CONF_NAK: return "conf-nak"; 5944 case CONF_REJ: return "conf-rej"; 5945 case TERM_REQ: return "term-req"; 5946 case TERM_ACK: return "term-ack"; 5947 case CODE_REJ: return "code-rej"; 5948 case PROTO_REJ: return "proto-rej"; 5949 case ECHO_REQ: return "echo-req"; 5950 case ECHO_REPLY: return "echo-reply"; 5951 case DISC_REQ: return "discard-req"; 5952 } 5953 snprintf(buf, sizeof(buf), "0x%x", type); 5954 return buf; 5955 } 5956 5957 static const char * 5958 sppp_auth_type_name(u_short proto, u_char type) 5959 { 5960 static char buf[32]; 5961 const char *name; 5962 5963 switch (proto) { 5964 case PPP_CHAP: 5965 switch (type) { 5966 case CHAP_CHALLENGE: return "challenge"; 5967 case CHAP_RESPONSE: return "response"; 5968 case CHAP_SUCCESS: return "success"; 5969 case CHAP_FAILURE: return "failure"; 5970 default: name = "chap"; break; 5971 } 5972 break; 5973 5974 case PPP_PAP: 5975 switch (type) { 5976 case PAP_REQ: return "req"; 5977 case PAP_ACK: return "ack"; 5978 case PAP_NAK: return "nak"; 5979 default: name = "pap"; break; 5980 } 5981 break; 5982 5983 default: 5984 name = "bad"; 5985 break; 5986 } 5987 5988 snprintf(buf, sizeof(buf), "%s(%#x) %#x", name, proto, type); 5989 return buf; 5990 } 5991 5992 static const char * 5993 sppp_lcp_opt_name(u_char opt) 5994 { 5995 static char buf[12]; 5996 switch (opt) { 5997 case LCP_OPT_MRU: return "mru"; 5998 case LCP_OPT_ASYNC_MAP: return "async-map"; 5999 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 6000 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 6001 case LCP_OPT_MAGIC: return "magic"; 6002 case LCP_OPT_PROTO_COMP: return "proto-comp"; 6003 case LCP_OPT_ADDR_COMP: return "addr-comp"; 6004 } 6005 snprintf(buf, sizeof(buf), "0x%x", opt); 6006 return buf; 6007 } 6008 6009 static const char * 6010 sppp_ipcp_opt_name(u_char opt) 6011 { 6012 static char buf[12]; 6013 switch (opt) { 6014 case IPCP_OPT_ADDRESSES: return "addresses"; 6015 case IPCP_OPT_COMPRESSION: return "compression"; 6016 case IPCP_OPT_ADDRESS: return "address"; 6017 } 6018 snprintf(buf, sizeof(buf), "0x%x", opt); 6019 return buf; 6020 } 6021 6022 #ifdef INET6 6023 static const char * 6024 sppp_ipv6cp_opt_name(u_char opt) 6025 { 6026 static char buf[12]; 6027 switch (opt) { 6028 case IPV6CP_OPT_IFID: return "ifid"; 6029 case IPV6CP_OPT_COMPRESSION: return "compression"; 6030 } 6031 snprintf(buf, sizeof(buf), "0x%x", opt); 6032 return buf; 6033 } 6034 #endif 6035 6036 static const char * 6037 sppp_state_name(int state) 6038 { 6039 switch (state) { 6040 case STATE_INITIAL: return "initial"; 6041 case STATE_STARTING: return "starting"; 6042 case STATE_CLOSED: return "closed"; 6043 case STATE_STOPPED: return "stopped"; 6044 case STATE_CLOSING: return "closing"; 6045 case STATE_STOPPING: return "stopping"; 6046 case STATE_REQ_SENT: return "req-sent"; 6047 case STATE_ACK_RCVD: return "ack-rcvd"; 6048 case STATE_ACK_SENT: return "ack-sent"; 6049 case STATE_OPENED: return "opened"; 6050 } 6051 return "illegal"; 6052 } 6053 6054 static const char * 6055 sppp_phase_name(int phase) 6056 { 6057 switch (phase) { 6058 case SPPP_PHASE_DEAD: return "dead"; 6059 case SPPP_PHASE_ESTABLISH: return "establish"; 6060 case SPPP_PHASE_TERMINATE: return "terminate"; 6061 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 6062 case SPPP_PHASE_NETWORK: return "network"; 6063 } 6064 return "illegal"; 6065 } 6066 6067 static const char * 6068 sppp_proto_name(u_short proto) 6069 { 6070 static char buf[12]; 6071 switch (proto) { 6072 case PPP_LCP: return "lcp"; 6073 case PPP_IPCP: return "ipcp"; 6074 case PPP_PAP: return "pap"; 6075 case PPP_CHAP: return "chap"; 6076 case PPP_IPV6CP: return "ipv6cp"; 6077 } 6078 snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto); 6079 return buf; 6080 } 6081 6082 static void 6083 sppp_print_bytes(const u_char *p, u_short len) 6084 { 6085 addlog(" %02x", *p++); 6086 while (--len > 0) 6087 addlog("-%02x", *p++); 6088 } 6089 6090 static void 6091 sppp_print_string(const char *p, u_short len) 6092 { 6093 u_char c; 6094 6095 while (len-- > 0) { 6096 c = *p++; 6097 /* 6098 * Print only ASCII chars directly. RFC 1994 recommends 6099 * using only them, but we don't rely on it. */ 6100 if (c < ' ' || c > '~') 6101 addlog("\\x%x", c); 6102 else 6103 addlog("%c", c); 6104 } 6105 } 6106 6107 static const char * 6108 sppp_dotted_quad(uint32_t addr) 6109 { 6110 static char s[16]; 6111 snprintf(s, sizeof(s), "%d.%d.%d.%d", 6112 (int)((addr >> 24) & 0xff), 6113 (int)((addr >> 16) & 0xff), 6114 (int)((addr >> 8) & 0xff), 6115 (int)(addr & 0xff)); 6116 return s; 6117 } 6118 6119 /* a dummy, used to drop uninteresting events */ 6120 static void 6121 sppp_null(struct sppp *unused) 6122 { 6123 /* do just nothing */ 6124 } 6125 /* 6126 * This file is large. Tell emacs to highlight it nevertheless. 6127 * 6128 * Local Variables: 6129 * hilit-auto-highlight-maxout: 120000 6130 * End: 6131 */ 6132
Indexes created Tue Oct 14 15:09:51 GMT 2025