if_spppsubr.c revision 1.89
1 /* $NetBSD: if_spppsubr.c,v 1.89 2006/05/14 05:30:31 christos 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 1.89 2006/05/14 05:30:31 christos Exp $"); 45 46 #include "opt_inet.h" 47 #include "opt_ipx.h" 48 #include "opt_iso.h" 49 #include "opt_ns.h" 50 #include "opt_pfil_hooks.h" 51 52 #include <sys/param.h> 53 #include <sys/proc.h> 54 #include <sys/systm.h> 55 #include <sys/kernel.h> 56 #include <sys/sockio.h> 57 #include <sys/socket.h> 58 #include <sys/syslog.h> 59 #include <sys/malloc.h> 60 #include <sys/mbuf.h> 61 #include <sys/callout.h> 62 #include <sys/md5.h> 63 #include <sys/inttypes.h> 64 65 #include <net/if.h> 66 #include <net/netisr.h> 67 #include <net/if_types.h> 68 #include <net/route.h> 69 #include <net/ppp_defs.h> 70 71 #include <machine/stdarg.h> 72 73 #include <netinet/in.h> 74 #include <netinet/in_systm.h> 75 #include <netinet/in_var.h> 76 #ifdef INET 77 #include <netinet/ip.h> 78 #include <netinet/tcp.h> 79 #endif 80 #include <net/ethertypes.h> 81 82 #ifdef INET6 83 #include <netinet6/scope6_var.h> 84 #endif 85 86 #ifdef IPX 87 #include <netipx/ipx.h> 88 #include <netipx/ipx_if.h> 89 #endif 90 91 #ifdef NS 92 #include <netns/ns.h> 93 #include <netns/ns_if.h> 94 #endif 95 96 #ifdef ISO 97 #include <netiso/argo_debug.h> 98 #include <netiso/iso.h> 99 #include <netiso/iso_var.h> 100 #include <netiso/iso_snpac.h> 101 #endif 102 103 #include <net/if_sppp.h> 104 #include <net/if_spppvar.h> 105 106 #define LCP_KEEPALIVE_INTERVAL 10 /* seconds between checks */ 107 #define LOOPALIVECNT 3 /* loopback detection tries */ 108 #define DEFAULT_MAXALIVECNT 3 /* max. missed alive packets */ 109 #define DEFAULT_NORECV_TIME 15 /* before we get worried */ 110 #define DEFAULT_MAX_AUTH_FAILURES 5 /* max. auth. failures */ 111 112 /* 113 * Interface flags that can be set in an ifconfig command. 114 * 115 * Setting link0 will make the link passive, i.e. it will be marked 116 * as being administrative openable, but won't be opened to begin 117 * with. Incoming calls will be answered, or subsequent calls with 118 * -link1 will cause the administrative open of the LCP layer. 119 * 120 * Setting link1 will cause the link to auto-dial only as packets 121 * arrive to be sent. 122 * 123 * Setting IFF_DEBUG will syslog the option negotiation and state 124 * transitions at level kern.debug. Note: all logs consistently look 125 * like 126 * 127 * <if-name><unit>: <proto-name> <additional info...> 128 * 129 * with <if-name><unit> being something like "bppp0", and <proto-name> 130 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc. 131 */ 132 133 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ 134 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */ 135 136 #define CONF_REQ 1 /* PPP configure request */ 137 #define CONF_ACK 2 /* PPP configure acknowledge */ 138 #define CONF_NAK 3 /* PPP configure negative ack */ 139 #define CONF_REJ 4 /* PPP configure reject */ 140 #define TERM_REQ 5 /* PPP terminate request */ 141 #define TERM_ACK 6 /* PPP terminate acknowledge */ 142 #define CODE_REJ 7 /* PPP code reject */ 143 #define PROTO_REJ 8 /* PPP protocol reject */ 144 #define ECHO_REQ 9 /* PPP echo request */ 145 #define ECHO_REPLY 10 /* PPP echo reply */ 146 #define DISC_REQ 11 /* PPP discard request */ 147 148 #define LCP_OPT_MRU 1 /* maximum receive unit */ 149 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */ 150 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ 151 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ 152 #define LCP_OPT_MAGIC 5 /* magic number */ 153 #define LCP_OPT_RESERVED 6 /* reserved */ 154 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ 155 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ 156 157 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ 158 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol */ 159 #define IPCP_OPT_ADDRESS 3 /* local IP address */ 160 #define IPCP_OPT_PRIMDNS 129 /* primary remote dns address */ 161 #define IPCP_OPT_SECDNS 131 /* secondary remote dns address */ 162 163 #define IPV6CP_OPT_IFID 1 /* interface identifier */ 164 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ 165 166 #define PAP_REQ 1 /* PAP name/password request */ 167 #define PAP_ACK 2 /* PAP acknowledge */ 168 #define PAP_NAK 3 /* PAP fail */ 169 170 #define CHAP_CHALLENGE 1 /* CHAP challenge request */ 171 #define CHAP_RESPONSE 2 /* CHAP challenge response */ 172 #define CHAP_SUCCESS 3 /* CHAP response ok */ 173 #define CHAP_FAILURE 4 /* CHAP response failed */ 174 175 #define CHAP_MD5 5 /* hash algorithm - MD5 */ 176 177 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */ 178 #define CISCO_UNICAST 0x0f /* Cisco unicast address */ 179 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ 180 #define CISCO_ADDR_REQ 0 /* Cisco address request */ 181 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */ 182 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ 183 184 /* states are named and numbered according to RFC 1661 */ 185 #define STATE_INITIAL 0 186 #define STATE_STARTING 1 187 #define STATE_CLOSED 2 188 #define STATE_STOPPED 3 189 #define STATE_CLOSING 4 190 #define STATE_STOPPING 5 191 #define STATE_REQ_SENT 6 192 #define STATE_ACK_RCVD 7 193 #define STATE_ACK_SENT 8 194 #define STATE_OPENED 9 195 196 struct ppp_header { 197 u_int8_t address; 198 u_int8_t control; 199 u_int16_t protocol; 200 } __attribute__((__packed__)); 201 #define PPP_HEADER_LEN sizeof (struct ppp_header) 202 203 struct lcp_header { 204 u_int8_t type; 205 u_int8_t ident; 206 u_int16_t len; 207 } __attribute__((__packed__)); 208 #define LCP_HEADER_LEN sizeof (struct lcp_header) 209 210 struct cisco_packet { 211 u_int32_t type; 212 u_int32_t par1; 213 u_int32_t par2; 214 u_int16_t rel; 215 u_int16_t time0; 216 u_int16_t time1; 217 } __attribute__((__packed__)); 218 #define CISCO_PACKET_LEN 18 219 220 /* 221 * We follow the spelling and capitalization of RFC 1661 here, to make 222 * it easier comparing with the standard. Please refer to this RFC in 223 * case you can't make sense out of these abbreviation; it will also 224 * explain the semantics related to the various events and actions. 225 */ 226 struct cp { 227 u_short proto; /* PPP control protocol number */ 228 u_char protoidx; /* index into state table in struct sppp */ 229 u_char flags; 230 #define CP_LCP 0x01 /* this is the LCP */ 231 #define CP_AUTH 0x02 /* this is an authentication protocol */ 232 #define CP_NCP 0x04 /* this is a NCP */ 233 #define CP_QUAL 0x08 /* this is a quality reporting protocol */ 234 const char *name; /* name of this control protocol */ 235 /* event handlers */ 236 void (*Up)(struct sppp *sp); 237 void (*Down)(struct sppp *sp); 238 void (*Open)(struct sppp *sp); 239 void (*Close)(struct sppp *sp); 240 void (*TO)(void *sp); 241 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len); 242 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len); 243 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len); 244 /* actions */ 245 void (*tlu)(struct sppp *sp); 246 void (*tld)(struct sppp *sp); 247 void (*tls)(struct sppp *sp); 248 void (*tlf)(struct sppp *sp); 249 void (*scr)(struct sppp *sp); 250 }; 251 252 static struct sppp *spppq; 253 static struct callout keepalive_ch; 254 255 #ifdef INET 256 /* 257 * The following disgusting hack gets around the problem that IP TOS 258 * can't be set yet. We want to put "interactive" traffic on a high 259 * priority queue. To decide if traffic is interactive, we check that 260 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 261 * 262 * XXX is this really still necessary? - joerg - 263 */ 264 static u_short interactive_ports[8] = { 265 0, 513, 0, 0, 266 0, 21, 0, 23, 267 }; 268 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 269 #endif 270 271 /* almost every function needs these */ 272 #define STDDCL \ 273 struct ifnet *ifp = &sp->pp_if; \ 274 int debug = ifp->if_flags & IFF_DEBUG 275 276 static int sppp_output(struct ifnet *ifp, struct mbuf *m, 277 struct sockaddr *dst, struct rtentry *rt); 278 279 static void sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2); 280 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m); 281 282 static void sppp_cp_input(const struct cp *cp, struct sppp *sp, 283 struct mbuf *m); 284 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 285 u_char ident, u_short len, void *data); 286 /* static void sppp_cp_timeout(void *arg); */ 287 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp, 288 int newstate); 289 static void sppp_auth_send(const struct cp *cp, 290 struct sppp *sp, unsigned int type, unsigned int id, 291 ...); 292 293 static void sppp_up_event(const struct cp *cp, struct sppp *sp); 294 static void sppp_down_event(const struct cp *cp, struct sppp *sp); 295 static void sppp_open_event(const struct cp *cp, struct sppp *sp); 296 static void sppp_close_event(const struct cp *cp, struct sppp *sp); 297 static void sppp_to_event(const struct cp *cp, struct sppp *sp); 298 299 static void sppp_null(struct sppp *sp); 300 301 static void sppp_lcp_init(struct sppp *sp); 302 static void sppp_lcp_up(struct sppp *sp); 303 static void sppp_lcp_down(struct sppp *sp); 304 static void sppp_lcp_open(struct sppp *sp); 305 static void sppp_lcp_close(struct sppp *sp); 306 static void sppp_lcp_TO(void *sp); 307 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 308 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 309 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 310 static void sppp_lcp_tlu(struct sppp *sp); 311 static void sppp_lcp_tld(struct sppp *sp); 312 static void sppp_lcp_tls(struct sppp *sp); 313 static void sppp_lcp_tlf(struct sppp *sp); 314 static void sppp_lcp_scr(struct sppp *sp); 315 static void sppp_lcp_check_and_close(struct sppp *sp); 316 static int sppp_ncp_check(struct sppp *sp); 317 318 static void sppp_ipcp_init(struct sppp *sp); 319 static void sppp_ipcp_up(struct sppp *sp); 320 static void sppp_ipcp_down(struct sppp *sp); 321 static void sppp_ipcp_open(struct sppp *sp); 322 static void sppp_ipcp_close(struct sppp *sp); 323 static void sppp_ipcp_TO(void *sp); 324 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 325 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 326 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 327 static void sppp_ipcp_tlu(struct sppp *sp); 328 static void sppp_ipcp_tld(struct sppp *sp); 329 static void sppp_ipcp_tls(struct sppp *sp); 330 static void sppp_ipcp_tlf(struct sppp *sp); 331 static void sppp_ipcp_scr(struct sppp *sp); 332 333 static void sppp_ipv6cp_init(struct sppp *sp); 334 static void sppp_ipv6cp_up(struct sppp *sp); 335 static void sppp_ipv6cp_down(struct sppp *sp); 336 static void sppp_ipv6cp_open(struct sppp *sp); 337 static void sppp_ipv6cp_close(struct sppp *sp); 338 static void sppp_ipv6cp_TO(void *sp); 339 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len); 340 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 341 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 342 static void sppp_ipv6cp_tlu(struct sppp *sp); 343 static void sppp_ipv6cp_tld(struct sppp *sp); 344 static void sppp_ipv6cp_tls(struct sppp *sp); 345 static void sppp_ipv6cp_tlf(struct sppp *sp); 346 static void sppp_ipv6cp_scr(struct sppp *sp); 347 348 static void sppp_pap_input(struct sppp *sp, struct mbuf *m); 349 static void sppp_pap_init(struct sppp *sp); 350 static void sppp_pap_open(struct sppp *sp); 351 static void sppp_pap_close(struct sppp *sp); 352 static void sppp_pap_TO(void *sp); 353 static void sppp_pap_my_TO(void *sp); 354 static void sppp_pap_tlu(struct sppp *sp); 355 static void sppp_pap_tld(struct sppp *sp); 356 static void sppp_pap_scr(struct sppp *sp); 357 358 static void sppp_chap_input(struct sppp *sp, struct mbuf *m); 359 static void sppp_chap_init(struct sppp *sp); 360 static void sppp_chap_open(struct sppp *sp); 361 static void sppp_chap_close(struct sppp *sp); 362 static void sppp_chap_TO(void *sp); 363 static void sppp_chap_tlu(struct sppp *sp); 364 static void sppp_chap_tld(struct sppp *sp); 365 static void sppp_chap_scr(struct sppp *sp); 366 367 static const char *sppp_auth_type_name(u_short proto, u_char type); 368 static const char *sppp_cp_type_name(u_char type); 369 static const char *sppp_dotted_quad(u_int32_t addr); 370 static const char *sppp_ipcp_opt_name(u_char opt); 371 #ifdef INET6 372 static const char *sppp_ipv6cp_opt_name(u_char opt); 373 #endif 374 static const char *sppp_lcp_opt_name(u_char opt); 375 static const char *sppp_phase_name(int phase); 376 static const char *sppp_proto_name(u_short proto); 377 static const char *sppp_state_name(int state); 378 static int sppp_params(struct sppp *sp, int cmd, void *data); 379 #ifdef INET 380 static void sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, 381 u_int32_t *srcmask); 382 static void sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr); 383 static void sppp_clear_ip_addrs(struct sppp *sp); 384 #endif 385 static void sppp_keepalive(void *dummy); 386 static void sppp_phase_network(struct sppp *sp); 387 static void sppp_print_bytes(const u_char *p, u_short len); 388 static void sppp_print_string(const char *p, u_short len); 389 #ifdef INET6 390 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, 391 struct in6_addr *dst, struct in6_addr *srcmask); 392 #ifdef IPV6CP_MYIFID_DYN 393 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src); 394 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src); 395 #endif 396 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src); 397 #endif 398 399 /* our control protocol descriptors */ 400 static const struct cp lcp = { 401 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 402 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close, 403 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak, 404 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf, 405 sppp_lcp_scr 406 }; 407 408 static const struct cp ipcp = { 409 PPP_IPCP, IDX_IPCP, 410 #ifdef INET 411 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 412 #else 413 0, 414 #endif 415 "ipcp", 416 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close, 417 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak, 418 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf, 419 sppp_ipcp_scr 420 }; 421 422 static const struct cp ipv6cp = { 423 PPP_IPV6CP, IDX_IPV6CP, 424 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 425 CP_NCP, 426 #else 427 0, 428 #endif 429 "ipv6cp", 430 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close, 431 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak, 432 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf, 433 sppp_ipv6cp_scr 434 }; 435 436 static const struct cp pap = { 437 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 438 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close, 439 sppp_pap_TO, 0, 0, 0, 440 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null, 441 sppp_pap_scr 442 }; 443 444 static const struct cp chap = { 445 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 446 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close, 447 sppp_chap_TO, 0, 0, 0, 448 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null, 449 sppp_chap_scr 450 }; 451 452 static const struct cp *cps[IDX_COUNT] = { 453 &lcp, /* IDX_LCP */ 454 &ipcp, /* IDX_IPCP */ 455 &ipv6cp, /* IDX_IPV6CP */ 456 &pap, /* IDX_PAP */ 457 &chap, /* IDX_CHAP */ 458 }; 459 460 461 void spppattach(int); 462 void 463 /*ARGSUSED*/ 464 spppattach(int count) 465 { 466 } 467 468 /* 469 * Exported functions, comprising our interface to the lower layer. 470 */ 471 472 /* 473 * Process the received packet. 474 */ 475 void 476 sppp_input(struct ifnet *ifp, struct mbuf *m) 477 { 478 struct ppp_header *h = NULL; 479 struct ifqueue *inq = 0; 480 u_int16_t protocol; 481 int s; 482 struct sppp *sp = (struct sppp *)ifp; 483 int debug = ifp->if_flags & IFF_DEBUG; 484 485 if (ifp->if_flags & IFF_UP) { 486 /* Count received bytes, add hardware framing */ 487 ifp->if_ibytes += m->m_pkthdr.len + sp->pp_framebytes; 488 /* Note time of last receive */ 489 sp->pp_last_receive = mono_time.tv_sec; 490 } 491 492 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 493 /* Too small packet, drop it. */ 494 if (debug) 495 log(LOG_DEBUG, 496 "%s: input packet is too small, %d bytes\n", 497 ifp->if_xname, m->m_pkthdr.len); 498 drop: 499 ++ifp->if_ierrors; 500 ++ifp->if_iqdrops; 501 m_freem(m); 502 return; 503 } 504 505 if (sp->pp_flags & PP_NOFRAMING) { 506 memcpy(&protocol, mtod(m, void *), 2); 507 protocol = ntohs(protocol); 508 m_adj(m, 2); 509 } else { 510 511 /* Get PPP header. */ 512 h = mtod(m, struct ppp_header *); 513 m_adj(m, PPP_HEADER_LEN); 514 515 switch (h->address) { 516 case PPP_ALLSTATIONS: 517 if (h->control != PPP_UI) 518 goto invalid; 519 if (sp->pp_flags & PP_CISCO) { 520 if (debug) 521 log(LOG_DEBUG, 522 "%s: PPP packet in Cisco mode " 523 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 524 ifp->if_xname, 525 h->address, h->control, ntohs(h->protocol)); 526 goto drop; 527 } 528 break; 529 case CISCO_MULTICAST: 530 case CISCO_UNICAST: 531 /* Don't check the control field here (RFC 1547). */ 532 if (! (sp->pp_flags & PP_CISCO)) { 533 if (debug) 534 log(LOG_DEBUG, 535 "%s: Cisco packet in PPP mode " 536 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 537 ifp->if_xname, 538 h->address, h->control, ntohs(h->protocol)); 539 goto drop; 540 } 541 switch (ntohs(h->protocol)) { 542 default: 543 ++ifp->if_noproto; 544 goto invalid; 545 case CISCO_KEEPALIVE: 546 sppp_cisco_input((struct sppp *) ifp, m); 547 m_freem(m); 548 return; 549 #ifdef INET 550 case ETHERTYPE_IP: 551 schednetisr(NETISR_IP); 552 inq = &ipintrq; 553 break; 554 #endif 555 #ifdef INET6 556 case ETHERTYPE_IPV6: 557 schednetisr(NETISR_IPV6); 558 inq = &ip6intrq; 559 break; 560 #endif 561 #ifdef IPX 562 case ETHERTYPE_IPX: 563 schednetisr(NETISR_IPX); 564 inq = &ipxintrq; 565 break; 566 #endif 567 #ifdef NS 568 case ETHERTYPE_NS: 569 schednetisr(NETISR_NS); 570 inq = &nsintrq; 571 break; 572 #endif 573 } 574 goto queue_pkt; 575 default: /* Invalid PPP packet. */ 576 invalid: 577 if (debug) 578 log(LOG_DEBUG, 579 "%s: invalid input packet " 580 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 581 ifp->if_xname, 582 h->address, h->control, ntohs(h->protocol)); 583 goto drop; 584 } 585 protocol = ntohs(h->protocol); 586 } 587 588 switch (protocol) { 589 default: 590 if (sp->state[IDX_LCP] == STATE_OPENED) { 591 u_int16_t prot = htons(protocol); 592 sppp_cp_send(sp, PPP_LCP, PROTO_REJ, 593 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2, 594 &prot); 595 } 596 if (debug) 597 log(LOG_DEBUG, 598 "%s: invalid input protocol " 599 "<proto=0x%x>\n", ifp->if_xname, ntohs(protocol)); 600 ++ifp->if_noproto; 601 goto drop; 602 case PPP_LCP: 603 sppp_cp_input(&lcp, sp, m); 604 m_freem(m); 605 return; 606 case PPP_PAP: 607 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 608 sppp_pap_input(sp, m); 609 m_freem(m); 610 return; 611 case PPP_CHAP: 612 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 613 sppp_chap_input(sp, m); 614 m_freem(m); 615 return; 616 #ifdef INET 617 case PPP_IPCP: 618 if (sp->pp_phase == SPPP_PHASE_NETWORK) 619 sppp_cp_input(&ipcp, sp, m); 620 m_freem(m); 621 return; 622 case PPP_IP: 623 if (sp->state[IDX_IPCP] == STATE_OPENED) { 624 schednetisr(NETISR_IP); 625 inq = &ipintrq; 626 sp->pp_last_activity = mono_time.tv_sec; 627 } 628 break; 629 #endif 630 #ifdef INET6 631 case PPP_IPV6CP: 632 if (sp->pp_phase == SPPP_PHASE_NETWORK) 633 sppp_cp_input(&ipv6cp, sp, m); 634 m_freem(m); 635 return; 636 637 case PPP_IPV6: 638 if (sp->state[IDX_IPV6CP] == STATE_OPENED) { 639 schednetisr(NETISR_IPV6); 640 inq = &ip6intrq; 641 sp->pp_last_activity = mono_time.tv_sec; 642 } 643 break; 644 #endif 645 #ifdef IPX 646 case PPP_IPX: 647 /* IPX IPXCP not implemented yet */ 648 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 649 schednetisr(NETISR_IPX); 650 inq = &ipxintrq; 651 } 652 break; 653 #endif 654 #ifdef NS 655 case PPP_XNS: 656 /* XNS IDPCP not implemented yet */ 657 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 658 schednetisr(NETISR_NS); 659 inq = &nsintrq; 660 } 661 break; 662 #endif 663 #ifdef ISO 664 case PPP_ISO: 665 /* OSI NLCP not implemented yet */ 666 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 667 schednetisr(NETISR_ISO); 668 inq = &clnlintrq; 669 } 670 break; 671 #endif 672 } 673 674 queue_pkt: 675 if (! (ifp->if_flags & IFF_UP) || ! inq) 676 goto drop; 677 678 /* Check queue. */ 679 s = splnet(); 680 if (IF_QFULL(inq)) { 681 /* Queue overflow. */ 682 IF_DROP(inq); 683 splx(s); 684 if (debug) 685 log(LOG_DEBUG, "%s: protocol queue overflow\n", 686 ifp->if_xname); 687 goto drop; 688 } 689 IF_ENQUEUE(inq, m); 690 splx(s); 691 } 692 693 /* 694 * Enqueue transmit packet. 695 */ 696 static int 697 sppp_output(struct ifnet *ifp, struct mbuf *m, 698 struct sockaddr *dst, struct rtentry *rt) 699 { 700 struct sppp *sp = (struct sppp *) ifp; 701 struct ppp_header *h = NULL; 702 struct ifqueue *ifq = NULL; /* XXX */ 703 int s, error = 0; 704 u_int16_t protocol; 705 ALTQ_DECL(struct altq_pktattr pktattr;) 706 707 s = splnet(); 708 709 sp->pp_last_activity = mono_time.tv_sec; 710 711 if ((ifp->if_flags & IFF_UP) == 0 || 712 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 713 m_freem(m); 714 splx(s); 715 return (ENETDOWN); 716 } 717 718 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 719 /* 720 * Interface is not yet running, but auto-dial. Need 721 * to start LCP for it. 722 */ 723 ifp->if_flags |= IFF_RUNNING; 724 splx(s); 725 lcp.Open(sp); 726 s = splnet(); 727 } 728 729 /* 730 * If the queueing discipline needs packet classification, 731 * do it before prepending link headers. 732 */ 733 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family, &pktattr); 734 735 #ifdef INET 736 if (dst->sa_family == AF_INET) { 737 struct ip *ip = NULL; 738 struct tcphdr *th = NULL; 739 740 if (m->m_len >= sizeof(struct ip)) { 741 ip = mtod(m, struct ip *); 742 if (ip->ip_p == IPPROTO_TCP && 743 m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) + 744 sizeof(struct tcphdr)) { 745 th = (struct tcphdr *) 746 ((caddr_t)ip + (ip->ip_hl << 2)); 747 } 748 } else 749 ip = NULL; 750 751 /* 752 * When using dynamic local IP address assignment by using 753 * 0.0.0.0 as a local address, the first TCP session will 754 * not connect because the local TCP checksum is computed 755 * using 0.0.0.0 which will later become our real IP address 756 * so the TCP checksum computed at the remote end will 757 * become invalid. So we 758 * - don't let packets with src ip addr 0 thru 759 * - we flag TCP packets with src ip 0 as an error 760 */ 761 if (ip && ip->ip_src.s_addr == INADDR_ANY) { 762 u_int8_t proto = ip->ip_p; 763 764 m_freem(m); 765 splx(s); 766 if (proto == IPPROTO_TCP) 767 return (EADDRNOTAVAIL); 768 else 769 return (0); 770 } 771 772 /* 773 * Put low delay, telnet, rlogin and ftp control packets 774 * in front of the queue. 775 */ 776 777 if (!IF_QFULL(&sp->pp_fastq) && 778 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || 779 (th && (INTERACTIVE(ntohs(th->th_sport)) || 780 INTERACTIVE(ntohs(th->th_dport)))))) 781 ifq = &sp->pp_fastq; 782 } 783 #endif 784 785 #ifdef INET6 786 if (dst->sa_family == AF_INET6) { 787 /* XXX do something tricky here? */ 788 } 789 #endif 790 791 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 792 /* 793 * Prepend general data packet PPP header. For now, IP only. 794 */ 795 M_PREPEND(m, PPP_HEADER_LEN, M_DONTWAIT); 796 if (! m) { 797 if (ifp->if_flags & IFF_DEBUG) 798 log(LOG_DEBUG, "%s: no memory for transmit header\n", 799 ifp->if_xname); 800 ++ifp->if_oerrors; 801 splx(s); 802 return (ENOBUFS); 803 } 804 /* 805 * May want to check size of packet 806 * (albeit due to the implementation it's always enough) 807 */ 808 h = mtod(m, struct ppp_header *); 809 if (sp->pp_flags & PP_CISCO) { 810 h->address = CISCO_UNICAST; /* unicast address */ 811 h->control = 0; 812 } else { 813 h->address = PPP_ALLSTATIONS; /* broadcast address */ 814 h->control = PPP_UI; /* Unnumbered Info */ 815 } 816 } 817 818 switch (dst->sa_family) { 819 #ifdef INET 820 case AF_INET: /* Internet Protocol */ 821 if (sp->pp_flags & PP_CISCO) 822 protocol = htons(ETHERTYPE_IP); 823 else { 824 /* 825 * Don't choke with an ENETDOWN early. It's 826 * possible that we just started dialing out, 827 * so don't drop the packet immediately. If 828 * we notice that we run out of buffer space 829 * below, we will however remember that we are 830 * not ready to carry IP packets, and return 831 * ENETDOWN, as opposed to ENOBUFS. 832 */ 833 protocol = htons(PPP_IP); 834 if (sp->state[IDX_IPCP] != STATE_OPENED) 835 error = ENETDOWN; 836 } 837 break; 838 #endif 839 #ifdef INET6 840 case AF_INET6: /* Internet Protocol version 6 */ 841 if (sp->pp_flags & PP_CISCO) 842 protocol = htons(ETHERTYPE_IPV6); 843 else { 844 /* 845 * Don't choke with an ENETDOWN early. It's 846 * possible that we just started dialing out, 847 * so don't drop the packet immediately. If 848 * we notice that we run out of buffer space 849 * below, we will however remember that we are 850 * not ready to carry IP packets, and return 851 * ENETDOWN, as opposed to ENOBUFS. 852 */ 853 protocol = htons(PPP_IPV6); 854 if (sp->state[IDX_IPV6CP] != STATE_OPENED) 855 error = ENETDOWN; 856 } 857 break; 858 #endif 859 #ifdef NS 860 case AF_NS: /* Xerox NS Protocol */ 861 protocol = htons((sp->pp_flags & PP_CISCO) ? 862 ETHERTYPE_NS : PPP_XNS); 863 break; 864 #endif 865 #ifdef IPX 866 case AF_IPX: /* Novell IPX Protocol */ 867 protocol = htons((sp->pp_flags & PP_CISCO) ? 868 ETHERTYPE_IPX : PPP_IPX); 869 break; 870 #endif 871 #ifdef ISO 872 case AF_ISO: /* ISO OSI Protocol */ 873 if (sp->pp_flags & PP_CISCO) 874 goto nosupport; 875 protocol = htons(PPP_ISO); 876 break; 877 nosupport: 878 #endif 879 default: 880 m_freem(m); 881 ++ifp->if_oerrors; 882 splx(s); 883 return (EAFNOSUPPORT); 884 } 885 886 if (sp->pp_flags & PP_NOFRAMING) { 887 M_PREPEND(m, 2, M_DONTWAIT); 888 if (m == NULL) { 889 if (ifp->if_flags & IFF_DEBUG) 890 log(LOG_DEBUG, "%s: no memory for transmit header\n", 891 ifp->if_xname); 892 ++ifp->if_oerrors; 893 splx(s); 894 return (ENOBUFS); 895 } 896 *mtod(m, u_int16_t *) = protocol; 897 } else { 898 h->protocol = protocol; 899 } 900 901 902 error = ifq_enqueue2(ifp, ifq, m ALTQ_COMMA ALTQ_DECL(&pktattr)); 903 904 if (error == 0) { 905 /* 906 * Count output packets and bytes. 907 * The packet length includes header + additional hardware 908 * framing according to RFC 1333. 909 */ 910 if (!(ifp->if_flags & IFF_OACTIVE)) 911 (*ifp->if_start)(ifp); 912 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 913 } 914 splx(s); 915 return error; 916 } 917 918 void 919 sppp_attach(struct ifnet *ifp) 920 { 921 struct sppp *sp = (struct sppp *) ifp; 922 923 /* Initialize keepalive handler. */ 924 if (! spppq) { 925 callout_init(&keepalive_ch); 926 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 927 } 928 929 /* Insert new entry into the keepalive list. */ 930 sp->pp_next = spppq; 931 spppq = sp; 932 933 sp->pp_if.if_type = IFT_PPP; 934 sp->pp_if.if_output = sppp_output; 935 sp->pp_fastq.ifq_maxlen = 32; 936 sp->pp_cpq.ifq_maxlen = 20; 937 sp->pp_loopcnt = 0; 938 sp->pp_alivecnt = 0; 939 sp->pp_last_activity = 0; 940 sp->pp_last_receive = 0; 941 sp->pp_maxalive = DEFAULT_MAXALIVECNT; 942 sp->pp_max_noreceive = DEFAULT_NORECV_TIME; 943 sp->pp_idle_timeout = 0; 944 memset(&sp->pp_seq[0], 0, sizeof(sp->pp_seq)); 945 memset(&sp->pp_rseq[0], 0, sizeof(sp->pp_rseq)); 946 sp->pp_auth_failures = 0; 947 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 948 sp->pp_phase = SPPP_PHASE_DEAD; 949 sp->pp_up = lcp.Up; 950 sp->pp_down = lcp.Down; 951 952 if_alloc_sadl(ifp); 953 954 memset(&sp->myauth, 0, sizeof sp->myauth); 955 memset(&sp->hisauth, 0, sizeof sp->hisauth); 956 sppp_lcp_init(sp); 957 sppp_ipcp_init(sp); 958 sppp_ipv6cp_init(sp); 959 sppp_pap_init(sp); 960 sppp_chap_init(sp); 961 } 962 963 void 964 sppp_detach(struct ifnet *ifp) 965 { 966 struct sppp **q, *p, *sp = (struct sppp *) ifp; 967 int i; 968 969 /* Remove the entry from the keepalive list. */ 970 for (q = &spppq; (p = *q); q = &p->pp_next) 971 if (p == sp) { 972 *q = p->pp_next; 973 break; 974 } 975 976 /* Stop keepalive handler. */ 977 if (! spppq) { 978 callout_stop(&keepalive_ch); 979 } 980 981 for (i = 0; i < IDX_COUNT; i++) { 982 callout_stop(&sp->ch[i]); 983 } 984 callout_stop(&sp->pap_my_to_ch); 985 986 /* free authentication info */ 987 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 988 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 989 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 990 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 991 992 #if 0 /* done in if_detach() */ 993 if_free_sadl(ifp); 994 #endif 995 } 996 997 /* 998 * Flush the interface output queue. 999 */ 1000 void 1001 sppp_flush(struct ifnet *ifp) 1002 { 1003 struct sppp *sp = (struct sppp *) ifp; 1004 1005 IFQ_PURGE(&sp->pp_if.if_snd); 1006 IF_PURGE(&sp->pp_fastq); 1007 IF_PURGE(&sp->pp_cpq); 1008 } 1009 1010 /* 1011 * Check if the output queue is empty. 1012 */ 1013 int 1014 sppp_isempty(struct ifnet *ifp) 1015 { 1016 struct sppp *sp = (struct sppp *) ifp; 1017 int empty, s; 1018 1019 s = splnet(); 1020 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1021 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1022 splx(s); 1023 return (empty); 1024 } 1025 1026 /* 1027 * Get next packet to send. 1028 */ 1029 struct mbuf * 1030 sppp_dequeue(struct ifnet *ifp) 1031 { 1032 struct sppp *sp = (struct sppp *) ifp; 1033 struct mbuf *m; 1034 int s; 1035 1036 s = splnet(); 1037 /* 1038 * Process only the control protocol queue until we have at 1039 * least one NCP open. 1040 * 1041 * Do always serve all three queues in Cisco mode. 1042 */ 1043 IF_DEQUEUE(&sp->pp_cpq, m); 1044 if (m == NULL && 1045 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { 1046 IF_DEQUEUE(&sp->pp_fastq, m); 1047 if (m == NULL) 1048 IFQ_DEQUEUE(&sp->pp_if.if_snd, m); 1049 } 1050 splx(s); 1051 return m; 1052 } 1053 1054 /* 1055 * Process an ioctl request. Called on low priority level. 1056 */ 1057 int 1058 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1059 { 1060 struct ifreq *ifr = (struct ifreq *) data; 1061 struct sppp *sp = (struct sppp *) ifp; 1062 int s, error=0, going_up, going_down, newmode; 1063 1064 s = splnet(); 1065 switch (cmd) { 1066 case SIOCAIFADDR: 1067 case SIOCSIFDSTADDR: 1068 break; 1069 1070 case SIOCSIFADDR: 1071 if_up(ifp); 1072 /* fall through... */ 1073 1074 case SIOCSIFFLAGS: 1075 going_up = ifp->if_flags & IFF_UP && 1076 (ifp->if_flags & IFF_RUNNING) == 0; 1077 going_down = (ifp->if_flags & IFF_UP) == 0 && 1078 ifp->if_flags & IFF_RUNNING; 1079 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1080 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1081 /* sanity */ 1082 newmode = IFF_PASSIVE; 1083 ifp->if_flags &= ~IFF_AUTO; 1084 } 1085 1086 if (going_up || going_down) 1087 lcp.Close(sp); 1088 if (going_up && newmode == 0) { 1089 /* neither auto-dial nor passive */ 1090 ifp->if_flags |= IFF_RUNNING; 1091 if (!(sp->pp_flags & PP_CISCO)) 1092 lcp.Open(sp); 1093 } else if (going_down) { 1094 sppp_flush(ifp); 1095 ifp->if_flags &= ~IFF_RUNNING; 1096 } 1097 1098 break; 1099 1100 #ifdef SIOCSIFMTU 1101 #ifndef ifr_mtu 1102 #define ifr_mtu ifr_metric 1103 #endif 1104 case SIOCSIFMTU: 1105 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru) { 1106 error = EINVAL; 1107 break; 1108 } 1109 1110 ifp->if_mtu = ifr->ifr_mtu; 1111 break; 1112 #endif 1113 #ifdef SLIOCSETMTU 1114 case SLIOCSETMTU: 1115 if (*(short *)data < 128 || *(short *)data > sp->lcp.their_mru) 1116 { 1117 error = EINVAL; 1118 break; 1119 } 1120 1121 ifp->if_mtu = *(short *)data; 1122 break; 1123 #endif 1124 #ifdef SIOCGIFMTU 1125 case SIOCGIFMTU: 1126 ifr->ifr_mtu = ifp->if_mtu; 1127 break; 1128 #endif 1129 #ifdef SLIOCGETMTU 1130 case SLIOCGETMTU: 1131 *(short *)data = ifp->if_mtu; 1132 break; 1133 #endif 1134 case SIOCADDMULTI: 1135 case SIOCDELMULTI: 1136 break; 1137 1138 case SPPPSETAUTHCFG: 1139 case SPPPGETAUTHCFG: 1140 case SPPPSETLCPCFG: 1141 case SPPPGETLCPCFG: 1142 case SPPPSETIDLETO: 1143 case SPPPSETAUTHFAILURE: 1144 case SPPPGETAUTHFAILURES: 1145 case SPPPSETDNSOPTS: 1146 case SPPPSETKEEPALIVE: 1147 { 1148 struct proc *p = curproc; /* XXX */ 1149 1150 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1151 break; 1152 } 1153 /* FALLTHROUGH */ 1154 case SPPPGETSTATUS: 1155 case SPPPGETSTATUSNCP: 1156 case SPPPGETIDLETO: 1157 case SPPPGETDNSOPTS: 1158 case SPPPGETDNSADDRS: 1159 case SPPPGETKEEPALIVE: 1160 error = sppp_params(sp, cmd, data); 1161 break; 1162 1163 default: 1164 error = ENOTTY; 1165 } 1166 splx(s); 1167 return (error); 1168 } 1169 1170 1171 /* 1172 * Cisco framing implementation. 1173 */ 1174 1175 /* 1176 * Handle incoming Cisco keepalive protocol packets. 1177 */ 1178 static void 1179 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1180 { 1181 STDDCL; 1182 struct cisco_packet *h; 1183 #ifdef INET 1184 u_int32_t me, mymask = 0; /* XXX: GCC */ 1185 #endif 1186 1187 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1188 if (debug) 1189 log(LOG_DEBUG, 1190 "%s: cisco invalid packet length: %d bytes\n", 1191 ifp->if_xname, m->m_pkthdr.len); 1192 return; 1193 } 1194 h = mtod(m, struct cisco_packet *); 1195 if (debug) 1196 log(LOG_DEBUG, 1197 "%s: cisco input: %d bytes " 1198 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1199 ifp->if_xname, m->m_pkthdr.len, 1200 ntohl(h->type), h->par1, h->par2, (u_int)h->rel, 1201 (u_int)h->time0, (u_int)h->time1); 1202 switch (ntohl(h->type)) { 1203 default: 1204 if (debug) 1205 addlog("%s: cisco unknown packet type: 0x%x\n", 1206 ifp->if_xname, ntohl(h->type)); 1207 break; 1208 case CISCO_ADDR_REPLY: 1209 /* Reply on address request, ignore */ 1210 break; 1211 case CISCO_KEEPALIVE_REQ: 1212 sp->pp_alivecnt = 0; 1213 sp->pp_rseq[IDX_LCP] = ntohl(h->par1); 1214 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 1215 /* Local and remote sequence numbers are equal. 1216 * Probably, the line is in loopback mode. */ 1217 if (sp->pp_loopcnt >= LOOPALIVECNT) { 1218 printf ("%s: loopback\n", 1219 ifp->if_xname); 1220 sp->pp_loopcnt = 0; 1221 if (ifp->if_flags & IFF_UP) { 1222 if_down(ifp); 1223 IF_PURGE(&sp->pp_cpq); 1224 } 1225 } 1226 ++sp->pp_loopcnt; 1227 1228 /* Generate new local sequence number */ 1229 sp->pp_seq[IDX_LCP] = arc4random(); 1230 break; 1231 } 1232 sp->pp_loopcnt = 0; 1233 if (! (ifp->if_flags & IFF_UP) && 1234 (ifp->if_flags & IFF_RUNNING)) { 1235 if_up(ifp); 1236 } 1237 break; 1238 case CISCO_ADDR_REQ: 1239 #ifdef INET 1240 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1241 if (me != 0L) 1242 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1243 #endif 1244 break; 1245 } 1246 } 1247 1248 /* 1249 * Send Cisco keepalive packet. 1250 */ 1251 static void 1252 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1253 { 1254 STDDCL; 1255 struct ppp_header *h; 1256 struct cisco_packet *ch; 1257 struct mbuf *m; 1258 u_int32_t t = (time.tv_sec - boottime.tv_sec) * 1000; 1259 1260 MGETHDR(m, M_DONTWAIT, MT_DATA); 1261 if (! m) 1262 return; 1263 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1264 m->m_pkthdr.rcvif = 0; 1265 1266 h = mtod(m, struct ppp_header *); 1267 h->address = CISCO_MULTICAST; 1268 h->control = 0; 1269 h->protocol = htons(CISCO_KEEPALIVE); 1270 1271 ch = (struct cisco_packet *)(h + 1); 1272 ch->type = htonl(type); 1273 ch->par1 = htonl(par1); 1274 ch->par2 = htonl(par2); 1275 ch->rel = -1; 1276 1277 ch->time0 = htons((u_short)(t >> 16)); 1278 ch->time1 = htons((u_short) t); 1279 1280 if (debug) 1281 log(LOG_DEBUG, 1282 "%s: cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1283 ifp->if_xname, ntohl(ch->type), ch->par1, 1284 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1285 (u_int)ch->time1); 1286 1287 if (IF_QFULL(&sp->pp_cpq)) { 1288 IF_DROP(&sp->pp_fastq); 1289 IF_DROP(&ifp->if_snd); 1290 m_freem(m); 1291 ++ifp->if_oerrors; 1292 return; 1293 } else 1294 IF_ENQUEUE(&sp->pp_cpq, m); 1295 if (! (ifp->if_flags & IFF_OACTIVE)) 1296 (*ifp->if_start)(ifp); 1297 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1298 } 1299 1300 /* 1301 * PPP protocol implementation. 1302 */ 1303 1304 /* 1305 * Send PPP control protocol packet. 1306 */ 1307 static void 1308 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1309 u_char ident, u_short len, void *data) 1310 { 1311 STDDCL; 1312 struct lcp_header *lh; 1313 struct mbuf *m; 1314 size_t pkthdrlen; 1315 1316 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1317 1318 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1319 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1320 MGETHDR(m, M_DONTWAIT, MT_DATA); 1321 if (! m) 1322 return; 1323 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1324 m->m_pkthdr.rcvif = 0; 1325 1326 if (sp->pp_flags & PP_NOFRAMING) { 1327 *mtod(m, u_int16_t *) = htons(proto); 1328 lh = (struct lcp_header *)(mtod(m, u_int8_t *) + 2); 1329 } else { 1330 struct ppp_header *h; 1331 h = mtod(m, struct ppp_header *); 1332 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1333 h->control = PPP_UI; /* Unnumbered Info */ 1334 h->protocol = htons(proto); /* Link Control Protocol */ 1335 lh = (struct lcp_header *)(h + 1); 1336 } 1337 lh->type = type; 1338 lh->ident = ident; 1339 lh->len = htons(LCP_HEADER_LEN + len); 1340 if (len) 1341 bcopy (data, lh + 1, len); 1342 1343 if (debug) { 1344 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 1345 ifp->if_xname, 1346 sppp_proto_name(proto), 1347 sppp_cp_type_name(lh->type), lh->ident, ntohs(lh->len)); 1348 if (len) 1349 sppp_print_bytes((u_char *)(lh + 1), len); 1350 addlog(">\n"); 1351 } 1352 if (IF_QFULL(&sp->pp_cpq)) { 1353 IF_DROP(&sp->pp_fastq); 1354 IF_DROP(&ifp->if_snd); 1355 m_freem(m); 1356 ++ifp->if_oerrors; 1357 return; 1358 } else 1359 IF_ENQUEUE(&sp->pp_cpq, m); 1360 if (! (ifp->if_flags & IFF_OACTIVE)) 1361 (*ifp->if_start)(ifp); 1362 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1363 } 1364 1365 /* 1366 * Handle incoming PPP control protocol packets. 1367 */ 1368 static void 1369 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1370 { 1371 STDDCL; 1372 struct lcp_header *h; 1373 int len = m->m_pkthdr.len; 1374 int rv; 1375 u_char *p; 1376 u_int32_t u32; 1377 1378 if (len < 4) { 1379 if (debug) 1380 log(LOG_DEBUG, 1381 "%s: %s invalid packet length: %d bytes\n", 1382 ifp->if_xname, cp->name, len); 1383 return; 1384 } 1385 h = mtod(m, struct lcp_header *); 1386 if (debug) { 1387 log(LOG_DEBUG, 1388 "%s: %s input(%s): <%s id=0x%x len=%d", 1389 ifp->if_xname, cp->name, 1390 sppp_state_name(sp->state[cp->protoidx]), 1391 sppp_cp_type_name(h->type), h->ident, ntohs(h->len)); 1392 if (len > 4) 1393 sppp_print_bytes((u_char *)(h + 1), len - 4); 1394 addlog(">\n"); 1395 } 1396 if (len > ntohs(h->len)) 1397 len = ntohs(h->len); 1398 p = (u_char *)(h + 1); 1399 switch (h->type) { 1400 case CONF_REQ: 1401 if (len < 4) { 1402 if (debug) 1403 addlog("%s: %s invalid conf-req length %d\n", 1404 ifp->if_xname, cp->name, 1405 len); 1406 ++ifp->if_ierrors; 1407 break; 1408 } 1409 /* handle states where RCR doesn't get a SCA/SCN */ 1410 switch (sp->state[cp->protoidx]) { 1411 case STATE_CLOSING: 1412 case STATE_STOPPING: 1413 return; 1414 case STATE_CLOSED: 1415 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1416 0, 0); 1417 return; 1418 } 1419 rv = (cp->RCR)(sp, h, len); 1420 switch (sp->state[cp->protoidx]) { 1421 case STATE_OPENED: 1422 (cp->tld)(sp); 1423 (cp->scr)(sp); 1424 /* fall through... */ 1425 case STATE_ACK_SENT: 1426 case STATE_REQ_SENT: 1427 sppp_cp_change_state(cp, sp, rv? 1428 STATE_ACK_SENT: STATE_REQ_SENT); 1429 break; 1430 case STATE_STOPPED: 1431 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1432 (cp->scr)(sp); 1433 sppp_cp_change_state(cp, sp, rv? 1434 STATE_ACK_SENT: STATE_REQ_SENT); 1435 break; 1436 case STATE_ACK_RCVD: 1437 if (rv) { 1438 sppp_cp_change_state(cp, sp, STATE_OPENED); 1439 if (debug) 1440 log(LOG_DEBUG, "%s: %s tlu\n", 1441 ifp->if_xname, 1442 cp->name); 1443 (cp->tlu)(sp); 1444 } else 1445 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1446 break; 1447 default: 1448 printf("%s: %s illegal %s in state %s\n", 1449 ifp->if_xname, cp->name, 1450 sppp_cp_type_name(h->type), 1451 sppp_state_name(sp->state[cp->protoidx])); 1452 ++ifp->if_ierrors; 1453 } 1454 break; 1455 case CONF_ACK: 1456 if (h->ident != sp->confid[cp->protoidx]) { 1457 if (debug) 1458 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1459 ifp->if_xname, cp->name, 1460 h->ident, sp->confid[cp->protoidx]); 1461 ++ifp->if_ierrors; 1462 break; 1463 } 1464 switch (sp->state[cp->protoidx]) { 1465 case STATE_CLOSED: 1466 case STATE_STOPPED: 1467 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1468 break; 1469 case STATE_CLOSING: 1470 case STATE_STOPPING: 1471 break; 1472 case STATE_REQ_SENT: 1473 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1474 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1475 break; 1476 case STATE_OPENED: 1477 (cp->tld)(sp); 1478 /* fall through */ 1479 case STATE_ACK_RCVD: 1480 (cp->scr)(sp); 1481 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1482 break; 1483 case STATE_ACK_SENT: 1484 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1485 sppp_cp_change_state(cp, sp, STATE_OPENED); 1486 if (debug) 1487 log(LOG_DEBUG, "%s: %s tlu\n", 1488 ifp->if_xname, cp->name); 1489 (cp->tlu)(sp); 1490 break; 1491 default: 1492 printf("%s: %s illegal %s in state %s\n", 1493 ifp->if_xname, cp->name, 1494 sppp_cp_type_name(h->type), 1495 sppp_state_name(sp->state[cp->protoidx])); 1496 ++ifp->if_ierrors; 1497 } 1498 break; 1499 case CONF_NAK: 1500 case CONF_REJ: 1501 if (h->ident != sp->confid[cp->protoidx]) { 1502 if (debug) 1503 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1504 ifp->if_xname, cp->name, 1505 h->ident, sp->confid[cp->protoidx]); 1506 ++ifp->if_ierrors; 1507 break; 1508 } 1509 if (h->type == CONF_NAK) 1510 (cp->RCN_nak)(sp, h, len); 1511 else /* CONF_REJ */ 1512 (cp->RCN_rej)(sp, h, len); 1513 1514 switch (sp->state[cp->protoidx]) { 1515 case STATE_CLOSED: 1516 case STATE_STOPPED: 1517 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1518 break; 1519 case STATE_REQ_SENT: 1520 case STATE_ACK_SENT: 1521 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1522 (cp->scr)(sp); 1523 break; 1524 case STATE_OPENED: 1525 (cp->tld)(sp); 1526 /* fall through */ 1527 case STATE_ACK_RCVD: 1528 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1529 (cp->scr)(sp); 1530 break; 1531 case STATE_CLOSING: 1532 case STATE_STOPPING: 1533 break; 1534 default: 1535 printf("%s: %s illegal %s in state %s\n", 1536 ifp->if_xname, cp->name, 1537 sppp_cp_type_name(h->type), 1538 sppp_state_name(sp->state[cp->protoidx])); 1539 ++ifp->if_ierrors; 1540 } 1541 break; 1542 1543 case TERM_REQ: 1544 switch (sp->state[cp->protoidx]) { 1545 case STATE_ACK_RCVD: 1546 case STATE_ACK_SENT: 1547 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1548 /* fall through */ 1549 case STATE_CLOSED: 1550 case STATE_STOPPED: 1551 case STATE_CLOSING: 1552 case STATE_STOPPING: 1553 case STATE_REQ_SENT: 1554 sta: 1555 /* Send Terminate-Ack packet. */ 1556 if (debug) 1557 log(LOG_DEBUG, "%s: %s send terminate-ack\n", 1558 ifp->if_xname, cp->name); 1559 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1560 break; 1561 case STATE_OPENED: 1562 (cp->tld)(sp); 1563 sp->rst_counter[cp->protoidx] = 0; 1564 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1565 goto sta; 1566 default: 1567 printf("%s: %s illegal %s in state %s\n", 1568 ifp->if_xname, cp->name, 1569 sppp_cp_type_name(h->type), 1570 sppp_state_name(sp->state[cp->protoidx])); 1571 ++ifp->if_ierrors; 1572 } 1573 break; 1574 case TERM_ACK: 1575 switch (sp->state[cp->protoidx]) { 1576 case STATE_CLOSED: 1577 case STATE_STOPPED: 1578 case STATE_REQ_SENT: 1579 case STATE_ACK_SENT: 1580 break; 1581 case STATE_CLOSING: 1582 (cp->tlf)(sp); 1583 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1584 sppp_lcp_check_and_close(sp); 1585 break; 1586 case STATE_STOPPING: 1587 (cp->tlf)(sp); 1588 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1589 sppp_lcp_check_and_close(sp); 1590 break; 1591 case STATE_ACK_RCVD: 1592 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1593 break; 1594 case STATE_OPENED: 1595 (cp->tld)(sp); 1596 (cp->scr)(sp); 1597 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1598 break; 1599 default: 1600 printf("%s: %s illegal %s in state %s\n", 1601 ifp->if_xname, cp->name, 1602 sppp_cp_type_name(h->type), 1603 sppp_state_name(sp->state[cp->protoidx])); 1604 ++ifp->if_ierrors; 1605 } 1606 break; 1607 case CODE_REJ: 1608 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1609 log(LOG_INFO, 1610 "%s: %s: ignoring RXJ (%s) for code ?, " 1611 "danger will robinson\n", 1612 ifp->if_xname, cp->name, 1613 sppp_cp_type_name(h->type)); 1614 switch (sp->state[cp->protoidx]) { 1615 case STATE_CLOSED: 1616 case STATE_STOPPED: 1617 case STATE_REQ_SENT: 1618 case STATE_ACK_SENT: 1619 case STATE_CLOSING: 1620 case STATE_STOPPING: 1621 case STATE_OPENED: 1622 break; 1623 case STATE_ACK_RCVD: 1624 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1625 break; 1626 default: 1627 printf("%s: %s illegal %s in state %s\n", 1628 ifp->if_xname, cp->name, 1629 sppp_cp_type_name(h->type), 1630 sppp_state_name(sp->state[cp->protoidx])); 1631 ++ifp->if_ierrors; 1632 } 1633 break; 1634 case PROTO_REJ: 1635 { 1636 int catastrophic; 1637 const struct cp *upper; 1638 int i; 1639 u_int16_t proto; 1640 1641 catastrophic = 0; 1642 upper = NULL; 1643 proto = p[0] << 8 | p[1]; 1644 for (i = 0; i < IDX_COUNT; i++) { 1645 if (cps[i]->proto == proto) { 1646 upper = cps[i]; 1647 break; 1648 } 1649 } 1650 if (upper == NULL) 1651 catastrophic++; 1652 1653 if (debug) 1654 log(LOG_INFO, 1655 "%s: %s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1656 ifp->if_xname, cp->name, catastrophic ? '-' : '+', 1657 sppp_cp_type_name(h->type), proto, 1658 upper ? upper->name : "unknown", 1659 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1660 1661 /* 1662 * if we got RXJ+ against conf-req, the peer does not implement 1663 * this particular protocol type. terminate the protocol. 1664 */ 1665 if (upper && !catastrophic) { 1666 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1667 upper->Close(sp); 1668 break; 1669 } 1670 } 1671 1672 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1673 switch (sp->state[cp->protoidx]) { 1674 case STATE_CLOSED: 1675 case STATE_STOPPED: 1676 case STATE_REQ_SENT: 1677 case STATE_ACK_SENT: 1678 case STATE_CLOSING: 1679 case STATE_STOPPING: 1680 case STATE_OPENED: 1681 break; 1682 case STATE_ACK_RCVD: 1683 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1684 break; 1685 default: 1686 printf("%s: %s illegal %s in state %s\n", 1687 ifp->if_xname, cp->name, 1688 sppp_cp_type_name(h->type), 1689 sppp_state_name(sp->state[cp->protoidx])); 1690 ++ifp->if_ierrors; 1691 } 1692 break; 1693 } 1694 case DISC_REQ: 1695 if (cp->proto != PPP_LCP) 1696 goto illegal; 1697 /* Discard the packet. */ 1698 break; 1699 case ECHO_REQ: 1700 if (cp->proto != PPP_LCP) 1701 goto illegal; 1702 if (sp->state[cp->protoidx] != STATE_OPENED) { 1703 if (debug) 1704 addlog("%s: lcp echo req but lcp closed\n", 1705 ifp->if_xname); 1706 ++ifp->if_ierrors; 1707 break; 1708 } 1709 if (len < 8) { 1710 if (debug) 1711 addlog("%s: invalid lcp echo request " 1712 "packet length: %d bytes\n", 1713 ifp->if_xname, len); 1714 break; 1715 } 1716 memcpy(&u32, h + 1, sizeof u32); 1717 if (ntohl(u32) == sp->lcp.magic) { 1718 /* Line loopback mode detected. */ 1719 printf("%s: loopback\n", ifp->if_xname); 1720 if_down(ifp); 1721 IF_PURGE(&sp->pp_cpq); 1722 1723 /* Shut down the PPP link. */ 1724 /* XXX */ 1725 lcp.Down(sp); 1726 lcp.Up(sp); 1727 break; 1728 } 1729 u32 = htonl(sp->lcp.magic); 1730 memcpy(h + 1, &u32, sizeof u32); 1731 if (debug) 1732 addlog("%s: got lcp echo req, sending echo rep\n", 1733 ifp->if_xname); 1734 sppp_cp_send(sp, PPP_LCP, ECHO_REPLY, h->ident, len - 4, 1735 h + 1); 1736 break; 1737 case ECHO_REPLY: 1738 if (cp->proto != PPP_LCP) 1739 goto illegal; 1740 if (h->ident != sp->lcp.echoid) { 1741 ++ifp->if_ierrors; 1742 break; 1743 } 1744 if (len < 8) { 1745 if (debug) 1746 addlog("%s: lcp invalid echo reply " 1747 "packet length: %d bytes\n", 1748 ifp->if_xname, len); 1749 break; 1750 } 1751 if (debug) 1752 addlog("%s: lcp got echo rep\n", 1753 ifp->if_xname); 1754 memcpy(&u32, h + 1, sizeof u32); 1755 if (ntohl(u32) != sp->lcp.magic) 1756 sp->pp_alivecnt = 0; 1757 break; 1758 default: 1759 /* Unknown packet type -- send Code-Reject packet. */ 1760 illegal: 1761 if (debug) 1762 addlog("%s: %s send code-rej for 0x%x\n", 1763 ifp->if_xname, cp->name, h->type); 1764 sppp_cp_send(sp, cp->proto, CODE_REJ, 1765 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 1766 ++ifp->if_ierrors; 1767 } 1768 } 1769 1770 1771 /* 1772 * The generic part of all Up/Down/Open/Close/TO event handlers. 1773 * Basically, the state transition handling in the automaton. 1774 */ 1775 static void 1776 sppp_up_event(const struct cp *cp, struct sppp *sp) 1777 { 1778 STDDCL; 1779 1780 if (debug) 1781 log(LOG_DEBUG, "%s: %s up(%s)\n", 1782 ifp->if_xname, cp->name, 1783 sppp_state_name(sp->state[cp->protoidx])); 1784 1785 switch (sp->state[cp->protoidx]) { 1786 case STATE_INITIAL: 1787 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1788 break; 1789 case STATE_STARTING: 1790 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1791 (cp->scr)(sp); 1792 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1793 break; 1794 default: 1795 printf("%s: %s illegal up in state %s\n", 1796 ifp->if_xname, cp->name, 1797 sppp_state_name(sp->state[cp->protoidx])); 1798 } 1799 } 1800 1801 static void 1802 sppp_down_event(const struct cp *cp, struct sppp *sp) 1803 { 1804 STDDCL; 1805 1806 if (debug) 1807 log(LOG_DEBUG, "%s: %s down(%s)\n", 1808 ifp->if_xname, cp->name, 1809 sppp_state_name(sp->state[cp->protoidx])); 1810 1811 switch (sp->state[cp->protoidx]) { 1812 case STATE_CLOSED: 1813 case STATE_CLOSING: 1814 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1815 break; 1816 case STATE_STOPPED: 1817 (cp->tls)(sp); 1818 /* fall through */ 1819 case STATE_STOPPING: 1820 case STATE_REQ_SENT: 1821 case STATE_ACK_RCVD: 1822 case STATE_ACK_SENT: 1823 sppp_cp_change_state(cp, sp, STATE_STARTING); 1824 break; 1825 case STATE_OPENED: 1826 (cp->tld)(sp); 1827 sppp_cp_change_state(cp, sp, STATE_STARTING); 1828 break; 1829 default: 1830 printf("%s: %s illegal down in state %s\n", 1831 ifp->if_xname, cp->name, 1832 sppp_state_name(sp->state[cp->protoidx])); 1833 } 1834 } 1835 1836 1837 static void 1838 sppp_open_event(const struct cp *cp, struct sppp *sp) 1839 { 1840 STDDCL; 1841 1842 if (debug) 1843 log(LOG_DEBUG, "%s: %s open(%s)\n", 1844 ifp->if_xname, cp->name, 1845 sppp_state_name(sp->state[cp->protoidx])); 1846 1847 switch (sp->state[cp->protoidx]) { 1848 case STATE_INITIAL: 1849 (cp->tls)(sp); 1850 sppp_cp_change_state(cp, sp, STATE_STARTING); 1851 break; 1852 case STATE_STARTING: 1853 break; 1854 case STATE_CLOSED: 1855 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1856 (cp->scr)(sp); 1857 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1858 break; 1859 case STATE_STOPPED: 1860 case STATE_STOPPING: 1861 case STATE_REQ_SENT: 1862 case STATE_ACK_RCVD: 1863 case STATE_ACK_SENT: 1864 case STATE_OPENED: 1865 break; 1866 case STATE_CLOSING: 1867 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1868 break; 1869 } 1870 } 1871 1872 1873 static void 1874 sppp_close_event(const struct cp *cp, struct sppp *sp) 1875 { 1876 STDDCL; 1877 1878 if (debug) 1879 log(LOG_DEBUG, "%s: %s close(%s)\n", 1880 ifp->if_xname, cp->name, 1881 sppp_state_name(sp->state[cp->protoidx])); 1882 1883 switch (sp->state[cp->protoidx]) { 1884 case STATE_INITIAL: 1885 case STATE_CLOSED: 1886 case STATE_CLOSING: 1887 break; 1888 case STATE_STARTING: 1889 (cp->tlf)(sp); 1890 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1891 break; 1892 case STATE_STOPPED: 1893 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1894 break; 1895 case STATE_STOPPING: 1896 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1897 break; 1898 case STATE_OPENED: 1899 (cp->tld)(sp); 1900 /* fall through */ 1901 case STATE_REQ_SENT: 1902 case STATE_ACK_RCVD: 1903 case STATE_ACK_SENT: 1904 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 1905 sppp_cp_send(sp, cp->proto, TERM_REQ, 1906 ++sp->pp_seq[cp->protoidx], 0, 0); 1907 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1908 break; 1909 } 1910 } 1911 1912 static void 1913 sppp_to_event(const struct cp *cp, struct sppp *sp) 1914 { 1915 STDDCL; 1916 int s; 1917 1918 s = splnet(); 1919 if (debug) 1920 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 1921 ifp->if_xname, cp->name, 1922 sppp_state_name(sp->state[cp->protoidx]), 1923 sp->rst_counter[cp->protoidx]); 1924 1925 if (--sp->rst_counter[cp->protoidx] < 0) 1926 /* TO- event */ 1927 switch (sp->state[cp->protoidx]) { 1928 case STATE_CLOSING: 1929 (cp->tlf)(sp); 1930 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1931 sppp_lcp_check_and_close(sp); 1932 break; 1933 case STATE_STOPPING: 1934 (cp->tlf)(sp); 1935 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1936 sppp_lcp_check_and_close(sp); 1937 break; 1938 case STATE_REQ_SENT: 1939 case STATE_ACK_RCVD: 1940 case STATE_ACK_SENT: 1941 (cp->tlf)(sp); 1942 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1943 sppp_lcp_check_and_close(sp); 1944 break; 1945 } 1946 else 1947 /* TO+ event */ 1948 switch (sp->state[cp->protoidx]) { 1949 case STATE_CLOSING: 1950 case STATE_STOPPING: 1951 sppp_cp_send(sp, cp->proto, TERM_REQ, 1952 ++sp->pp_seq[cp->protoidx], 0, 0); 1953 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1954 cp->TO, sp); 1955 break; 1956 case STATE_REQ_SENT: 1957 case STATE_ACK_RCVD: 1958 (cp->scr)(sp); 1959 /* sppp_cp_change_state() will restart the timer */ 1960 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1961 break; 1962 case STATE_ACK_SENT: 1963 (cp->scr)(sp); 1964 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1965 cp->TO, sp); 1966 break; 1967 } 1968 1969 splx(s); 1970 } 1971 1972 /* 1973 * Change the state of a control protocol in the state automaton. 1974 * Takes care of starting/stopping the restart timer. 1975 */ 1976 void 1977 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 1978 { 1979 sp->state[cp->protoidx] = newstate; 1980 callout_stop(&sp->ch[cp->protoidx]); 1981 switch (newstate) { 1982 case STATE_INITIAL: 1983 case STATE_STARTING: 1984 case STATE_CLOSED: 1985 case STATE_STOPPED: 1986 case STATE_OPENED: 1987 break; 1988 case STATE_CLOSING: 1989 case STATE_STOPPING: 1990 case STATE_REQ_SENT: 1991 case STATE_ACK_RCVD: 1992 case STATE_ACK_SENT: 1993 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1994 cp->TO, sp); 1995 break; 1996 } 1997 } 1998 1999 /* 2000 *--------------------------------------------------------------------------* 2001 * * 2002 * The LCP implementation. * 2003 * * 2004 *--------------------------------------------------------------------------* 2005 */ 2006 static void 2007 sppp_lcp_init(struct sppp *sp) 2008 { 2009 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 2010 sp->lcp.magic = 0; 2011 sp->state[IDX_LCP] = STATE_INITIAL; 2012 sp->fail_counter[IDX_LCP] = 0; 2013 sp->pp_seq[IDX_LCP] = 0; 2014 sp->pp_rseq[IDX_LCP] = 0; 2015 sp->lcp.protos = 0; 2016 sp->lcp.mru = sp->lcp.their_mru = PP_MTU; 2017 2018 /* 2019 * Initialize counters and timeout values. Note that we don't 2020 * use the 3 seconds suggested in RFC 1661 since we are likely 2021 * running on a fast link. XXX We should probably implement 2022 * the exponential backoff option. Note that these values are 2023 * relevant for all control protocols, not just LCP only. 2024 */ 2025 sp->lcp.timeout = 1 * hz; 2026 sp->lcp.max_terminate = 2; 2027 sp->lcp.max_configure = 10; 2028 sp->lcp.max_failure = 10; 2029 callout_init(&sp->ch[IDX_LCP]); 2030 } 2031 2032 static void 2033 sppp_lcp_up(struct sppp *sp) 2034 { 2035 STDDCL; 2036 2037 /* Initialize activity timestamp: opening a connection is an activity */ 2038 sp->pp_last_receive = sp->pp_last_activity = mono_time.tv_sec; 2039 2040 /* 2041 * If this interface is passive or dial-on-demand, and we are 2042 * still in Initial state, it means we've got an incoming 2043 * call. Activate the interface. 2044 */ 2045 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2046 if (debug) 2047 log(LOG_DEBUG, 2048 "%s: Up event", ifp->if_xname); 2049 ifp->if_flags |= IFF_RUNNING; 2050 if (sp->state[IDX_LCP] == STATE_INITIAL) { 2051 if (debug) 2052 addlog("(incoming call)\n"); 2053 sp->pp_flags |= PP_CALLIN; 2054 lcp.Open(sp); 2055 } else if (debug) 2056 addlog("\n"); 2057 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 && 2058 (sp->state[IDX_LCP] == STATE_INITIAL)) { 2059 ifp->if_flags |= IFF_RUNNING; 2060 lcp.Open(sp); 2061 } 2062 2063 sppp_up_event(&lcp, sp); 2064 } 2065 2066 static void 2067 sppp_lcp_down(struct sppp *sp) 2068 { 2069 STDDCL; 2070 2071 sppp_down_event(&lcp, sp); 2072 2073 /* 2074 * If this is neither a dial-on-demand nor a passive 2075 * interface, simulate an ``ifconfig down'' action, so the 2076 * administrator can force a redial by another ``ifconfig 2077 * up''. XXX For leased line operation, should we immediately 2078 * try to reopen the connection here? 2079 */ 2080 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2081 if (debug) 2082 log(LOG_INFO, 2083 "%s: Down event (carrier loss), taking interface down.\n", 2084 ifp->if_xname); 2085 if_down(ifp); 2086 } else { 2087 if (debug) 2088 log(LOG_DEBUG, 2089 "%s: Down event (carrier loss)\n", 2090 ifp->if_xname); 2091 } 2092 sp->pp_flags &= ~PP_CALLIN; 2093 if (sp->state[IDX_LCP] != STATE_INITIAL) 2094 lcp.Close(sp); 2095 ifp->if_flags &= ~IFF_RUNNING; 2096 } 2097 2098 static void 2099 sppp_lcp_open(struct sppp *sp) 2100 { 2101 /* 2102 * If we are authenticator, negotiate LCP_AUTH 2103 */ 2104 if (sp->hisauth.proto != 0) 2105 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2106 else 2107 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2108 sp->pp_flags &= ~PP_NEEDAUTH; 2109 sppp_open_event(&lcp, sp); 2110 } 2111 2112 static void 2113 sppp_lcp_close(struct sppp *sp) 2114 { 2115 sppp_close_event(&lcp, sp); 2116 } 2117 2118 static void 2119 sppp_lcp_TO(void *cookie) 2120 { 2121 sppp_to_event(&lcp, (struct sppp *)cookie); 2122 } 2123 2124 /* 2125 * Analyze a configure request. Return true if it was agreeable, and 2126 * caused action sca, false if it has been rejected or nak'ed, and 2127 * caused action scn. (The return value is used to make the state 2128 * transition decision in the state automaton.) 2129 */ 2130 static int 2131 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2132 { 2133 STDDCL; 2134 u_char *buf, *r, *p; 2135 int origlen, rlen; 2136 u_int32_t nmagic; 2137 u_short authproto; 2138 2139 len -= 4; 2140 origlen = len; 2141 buf = r = malloc (len, M_TEMP, M_NOWAIT); 2142 if (! buf) 2143 return (0); 2144 2145 if (debug) 2146 log(LOG_DEBUG, "%s: lcp parse opts:", 2147 ifp->if_xname); 2148 2149 /* pass 1: check for things that need to be rejected */ 2150 p = (void *)(h + 1); 2151 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2152 if (debug) 2153 addlog(" %s", sppp_lcp_opt_name(*p)); 2154 switch (*p) { 2155 case LCP_OPT_MAGIC: 2156 /* Magic number. */ 2157 /* fall through, both are same length */ 2158 case LCP_OPT_ASYNC_MAP: 2159 /* Async control character map. */ 2160 if (len >= 6 || p[1] == 6) 2161 continue; 2162 if (debug) 2163 addlog(" [invalid]"); 2164 break; 2165 case LCP_OPT_MRU: 2166 /* Maximum receive unit. */ 2167 if (len >= 4 && p[1] == 4) 2168 continue; 2169 if (debug) 2170 addlog(" [invalid]"); 2171 break; 2172 case LCP_OPT_AUTH_PROTO: 2173 if (len < 4) { 2174 if (debug) 2175 addlog(" [invalid]"); 2176 break; 2177 } 2178 authproto = (p[2] << 8) + p[3]; 2179 if (authproto == PPP_CHAP && p[1] != 5) { 2180 if (debug) 2181 addlog(" [invalid chap len]"); 2182 break; 2183 } 2184 if (sp->myauth.proto == 0) { 2185 /* we are not configured to do auth */ 2186 if (debug) 2187 addlog(" [not configured]"); 2188 break; 2189 } 2190 /* 2191 * Remote want us to authenticate, remember this, 2192 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2193 * up. 2194 */ 2195 sp->pp_flags |= PP_NEEDAUTH; 2196 continue; 2197 default: 2198 /* Others not supported. */ 2199 if (debug) 2200 addlog(" [rej]"); 2201 break; 2202 } 2203 /* Add the option to rejected list. */ 2204 bcopy (p, r, p[1]); 2205 r += p[1]; 2206 rlen += p[1]; 2207 } 2208 if (rlen) { 2209 if (debug) 2210 addlog(" send conf-rej\n"); 2211 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2212 goto end; 2213 } else if (debug) 2214 addlog("\n"); 2215 2216 /* 2217 * pass 2: check for option values that are unacceptable and 2218 * thus require to be nak'ed. 2219 */ 2220 if (debug) 2221 log(LOG_DEBUG, "%s: lcp parse opt values: ", 2222 ifp->if_xname); 2223 2224 p = (void *)(h + 1); 2225 len = origlen; 2226 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2227 if (debug) 2228 addlog(" %s", sppp_lcp_opt_name(*p)); 2229 switch (*p) { 2230 case LCP_OPT_MAGIC: 2231 /* Magic number -- extract. */ 2232 nmagic = (u_int32_t)p[2] << 24 | 2233 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2234 if (nmagic != sp->lcp.magic) { 2235 if (debug) 2236 addlog(" 0x%x", nmagic); 2237 continue; 2238 } 2239 /* 2240 * Local and remote magics equal -- loopback? 2241 */ 2242 if (sp->pp_loopcnt >= LOOPALIVECNT*5) { 2243 printf ("%s: loopback\n", 2244 ifp->if_xname); 2245 sp->pp_loopcnt = 0; 2246 if (ifp->if_flags & IFF_UP) { 2247 if_down(ifp); 2248 IF_PURGE(&sp->pp_cpq); 2249 /* XXX ? */ 2250 lcp.Down(sp); 2251 lcp.Up(sp); 2252 } 2253 } else if (debug) 2254 addlog(" [glitch]"); 2255 ++sp->pp_loopcnt; 2256 /* 2257 * We negate our magic here, and NAK it. If 2258 * we see it later in an NAK packet, we 2259 * suggest a new one. 2260 */ 2261 nmagic = ~sp->lcp.magic; 2262 /* Gonna NAK it. */ 2263 p[2] = nmagic >> 24; 2264 p[3] = nmagic >> 16; 2265 p[4] = nmagic >> 8; 2266 p[5] = nmagic; 2267 break; 2268 2269 case LCP_OPT_ASYNC_MAP: 2270 /* 2271 * Async control character map -- just ignore it. 2272 * 2273 * Quote from RFC 1662, chapter 6: 2274 * To enable this functionality, synchronous PPP 2275 * implementations MUST always respond to the 2276 * Async-Control-Character-Map Configuration 2277 * Option with the LCP Configure-Ack. However, 2278 * acceptance of the Configuration Option does 2279 * not imply that the synchronous implementation 2280 * will do any ACCM mapping. Instead, all such 2281 * octet mapping will be performed by the 2282 * asynchronous-to-synchronous converter. 2283 */ 2284 continue; 2285 2286 case LCP_OPT_MRU: 2287 /* 2288 * Maximum receive unit. Always agreeable, 2289 * but ignored by now. 2290 */ 2291 sp->lcp.their_mru = p[2] * 256 + p[3]; 2292 if (debug) 2293 addlog(" %ld", sp->lcp.their_mru); 2294 continue; 2295 2296 case LCP_OPT_AUTH_PROTO: 2297 authproto = (p[2] << 8) + p[3]; 2298 if (sp->myauth.proto != authproto) { 2299 /* not agreed, nak */ 2300 if (debug) 2301 addlog(" [mine %s != his %s]", 2302 sppp_proto_name(sp->myauth.proto), 2303 sppp_proto_name(authproto)); 2304 p[2] = sp->myauth.proto >> 8; 2305 p[3] = sp->myauth.proto; 2306 break; 2307 } 2308 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2309 if (debug) 2310 addlog(" [chap not MD5]"); 2311 p[4] = CHAP_MD5; 2312 break; 2313 } 2314 continue; 2315 } 2316 /* Add the option to nak'ed list. */ 2317 bcopy (p, r, p[1]); 2318 r += p[1]; 2319 rlen += p[1]; 2320 } 2321 if (rlen) { 2322 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2323 if (debug) 2324 addlog(" max_failure (%d) exceeded, " 2325 "send conf-rej\n", 2326 sp->lcp.max_failure); 2327 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2328 } else { 2329 if (debug) 2330 addlog(" send conf-nak\n"); 2331 sppp_cp_send(sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2332 } 2333 goto end; 2334 } else { 2335 if (debug) 2336 addlog(" send conf-ack\n"); 2337 sp->fail_counter[IDX_LCP] = 0; 2338 sp->pp_loopcnt = 0; 2339 sppp_cp_send(sp, PPP_LCP, CONF_ACK, h->ident, origlen, h + 1); 2340 } 2341 2342 end: 2343 free(buf, M_TEMP); 2344 return (rlen == 0); 2345 } 2346 2347 /* 2348 * Analyze the LCP Configure-Reject option list, and adjust our 2349 * negotiation. 2350 */ 2351 static void 2352 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2353 { 2354 STDDCL; 2355 u_char *buf, *p; 2356 2357 len -= 4; 2358 buf = malloc (len, M_TEMP, M_NOWAIT); 2359 if (!buf) 2360 return; 2361 2362 if (debug) 2363 log(LOG_DEBUG, "%s: lcp rej opts:", 2364 ifp->if_xname); 2365 2366 p = (void *)(h + 1); 2367 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2368 if (debug) 2369 addlog(" %s", sppp_lcp_opt_name(*p)); 2370 switch (*p) { 2371 case LCP_OPT_MAGIC: 2372 /* Magic number -- can't use it, use 0 */ 2373 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2374 sp->lcp.magic = 0; 2375 break; 2376 case LCP_OPT_MRU: 2377 /* 2378 * Should not be rejected anyway, since we only 2379 * negotiate a MRU if explicitly requested by 2380 * peer. 2381 */ 2382 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2383 break; 2384 case LCP_OPT_AUTH_PROTO: 2385 /* 2386 * Peer doesn't want to authenticate himself, 2387 * deny unless this is a dialout call, and 2388 * SPPP_AUTHFLAG_NOCALLOUT is set. 2389 */ 2390 if ((sp->pp_flags & PP_CALLIN) == 0 && 2391 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2392 if (debug) 2393 addlog(" [don't insist on auth " 2394 "for callout]"); 2395 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2396 break; 2397 } 2398 if (debug) 2399 addlog("[access denied]\n"); 2400 lcp.Close(sp); 2401 break; 2402 } 2403 } 2404 if (debug) 2405 addlog("\n"); 2406 free(buf, M_TEMP); 2407 return; 2408 } 2409 2410 /* 2411 * Analyze the LCP Configure-NAK option list, and adjust our 2412 * negotiation. 2413 */ 2414 static void 2415 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2416 { 2417 STDDCL; 2418 u_char *buf, *p; 2419 u_int32_t magic; 2420 2421 len -= 4; 2422 buf = malloc (len, M_TEMP, M_NOWAIT); 2423 if (!buf) 2424 return; 2425 2426 if (debug) 2427 log(LOG_DEBUG, "%s: lcp nak opts:", 2428 ifp->if_xname); 2429 2430 p = (void *)(h + 1); 2431 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2432 if (debug) 2433 addlog(" %s", sppp_lcp_opt_name(*p)); 2434 switch (*p) { 2435 case LCP_OPT_MAGIC: 2436 /* Magic number -- renegotiate */ 2437 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2438 len >= 6 && p[1] == 6) { 2439 magic = (u_int32_t)p[2] << 24 | 2440 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2441 /* 2442 * If the remote magic is our negated one, 2443 * this looks like a loopback problem. 2444 * Suggest a new magic to make sure. 2445 */ 2446 if (magic == ~sp->lcp.magic) { 2447 if (debug) 2448 addlog(" magic glitch"); 2449 sp->lcp.magic = arc4random(); 2450 } else { 2451 sp->lcp.magic = magic; 2452 if (debug) 2453 addlog(" %d", magic); 2454 } 2455 } 2456 break; 2457 case LCP_OPT_MRU: 2458 /* 2459 * Peer wants to advise us to negotiate an MRU. 2460 * Agree on it if it's reasonable, or use 2461 * default otherwise. 2462 */ 2463 if (len >= 4 && p[1] == 4) { 2464 u_int mru = p[2] * 256 + p[3]; 2465 if (debug) 2466 addlog(" %d", mru); 2467 if (mru < PP_MTU || mru > PP_MAX_MRU) 2468 mru = PP_MTU; 2469 sp->lcp.mru = mru; 2470 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2471 } 2472 break; 2473 case LCP_OPT_AUTH_PROTO: 2474 /* 2475 * Peer doesn't like our authentication method, 2476 * deny. 2477 */ 2478 if (debug) 2479 addlog("[access denied]\n"); 2480 lcp.Close(sp); 2481 break; 2482 } 2483 } 2484 if (debug) 2485 addlog("\n"); 2486 free(buf, M_TEMP); 2487 return; 2488 } 2489 2490 static void 2491 sppp_lcp_tlu(struct sppp *sp) 2492 { 2493 STDDCL; 2494 int i; 2495 u_int32_t mask; 2496 2497 /* XXX ? */ 2498 if (! (ifp->if_flags & IFF_UP) && 2499 (ifp->if_flags & IFF_RUNNING)) { 2500 /* Coming out of loopback mode. */ 2501 if_up(ifp); 2502 } 2503 2504 for (i = 0; i < IDX_COUNT; i++) 2505 if ((cps[i])->flags & CP_QUAL) 2506 (cps[i])->Open(sp); 2507 2508 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2509 (sp->pp_flags & PP_NEEDAUTH) != 0) 2510 sp->pp_phase = SPPP_PHASE_AUTHENTICATE; 2511 else 2512 sp->pp_phase = SPPP_PHASE_NETWORK; 2513 2514 if (debug) 2515 { 2516 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 2517 sppp_phase_name(sp->pp_phase)); 2518 } 2519 2520 /* 2521 * Open all authentication protocols. This is even required 2522 * if we already proceeded to network phase, since it might be 2523 * that remote wants us to authenticate, so we might have to 2524 * send a PAP request. Undesired authentication protocols 2525 * don't do anything when they get an Open event. 2526 */ 2527 for (i = 0; i < IDX_COUNT; i++) 2528 if ((cps[i])->flags & CP_AUTH) 2529 (cps[i])->Open(sp); 2530 2531 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2532 /* Notify all NCPs. */ 2533 for (i = 0; i < IDX_COUNT; i++) 2534 if ((cps[i])->flags & CP_NCP) 2535 (cps[i])->Open(sp); 2536 } 2537 2538 /* Send Up events to all started protos. */ 2539 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2540 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) 2541 (cps[i])->Up(sp); 2542 2543 /* notify low-level driver of state change */ 2544 if (sp->pp_chg) 2545 sp->pp_chg(sp, (int)sp->pp_phase); 2546 2547 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2548 /* if no NCP is starting, close down */ 2549 sppp_lcp_check_and_close(sp); 2550 } 2551 2552 static void 2553 sppp_lcp_tld(struct sppp *sp) 2554 { 2555 STDDCL; 2556 int i; 2557 u_int32_t mask; 2558 2559 sp->pp_phase = SPPP_PHASE_TERMINATE; 2560 2561 if (debug) 2562 { 2563 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 2564 sppp_phase_name(sp->pp_phase)); 2565 } 2566 2567 /* 2568 * Take upper layers down. We send the Down event first and 2569 * the Close second to prevent the upper layers from sending 2570 * ``a flurry of terminate-request packets'', as the RFC 2571 * describes it. 2572 */ 2573 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2574 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2575 (cps[i])->Down(sp); 2576 (cps[i])->Close(sp); 2577 } 2578 } 2579 2580 static void 2581 sppp_lcp_tls(struct sppp *sp) 2582 { 2583 STDDCL; 2584 2585 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2586 printf("%s: authentication failed %d times, not retrying again\n", 2587 sp->pp_if.if_xname, sp->pp_auth_failures); 2588 if_down(&sp->pp_if); 2589 return; 2590 } 2591 2592 sp->pp_phase = SPPP_PHASE_ESTABLISH; 2593 2594 if (debug) 2595 { 2596 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 2597 sppp_phase_name(sp->pp_phase)); 2598 } 2599 2600 /* Notify lower layer if desired. */ 2601 if (sp->pp_tls) 2602 (sp->pp_tls)(sp); 2603 } 2604 2605 static void 2606 sppp_lcp_tlf(struct sppp *sp) 2607 { 2608 STDDCL; 2609 2610 sp->pp_phase = SPPP_PHASE_DEAD; 2611 2612 if (debug) 2613 { 2614 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 2615 sppp_phase_name(sp->pp_phase)); 2616 } 2617 2618 /* Notify lower layer if desired. */ 2619 if (sp->pp_tlf) 2620 (sp->pp_tlf)(sp); 2621 } 2622 2623 static void 2624 sppp_lcp_scr(struct sppp *sp) 2625 { 2626 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2627 int i = 0; 2628 u_short authproto; 2629 2630 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2631 if (! sp->lcp.magic) 2632 sp->lcp.magic = arc4random(); 2633 opt[i++] = LCP_OPT_MAGIC; 2634 opt[i++] = 6; 2635 opt[i++] = sp->lcp.magic >> 24; 2636 opt[i++] = sp->lcp.magic >> 16; 2637 opt[i++] = sp->lcp.magic >> 8; 2638 opt[i++] = sp->lcp.magic; 2639 } 2640 2641 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2642 opt[i++] = LCP_OPT_MRU; 2643 opt[i++] = 4; 2644 opt[i++] = sp->lcp.mru >> 8; 2645 opt[i++] = sp->lcp.mru; 2646 } 2647 2648 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2649 authproto = sp->hisauth.proto; 2650 opt[i++] = LCP_OPT_AUTH_PROTO; 2651 opt[i++] = authproto == PPP_CHAP? 5: 4; 2652 opt[i++] = authproto >> 8; 2653 opt[i++] = authproto; 2654 if (authproto == PPP_CHAP) 2655 opt[i++] = CHAP_MD5; 2656 } 2657 2658 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2659 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2660 } 2661 2662 /* 2663 * Check the open NCPs, return true if at least one NCP is open. 2664 */ 2665 static int 2666 sppp_ncp_check(struct sppp *sp) 2667 { 2668 int i, mask; 2669 2670 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2671 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2672 return 1; 2673 return 0; 2674 } 2675 2676 /* 2677 * Re-check the open NCPs and see if we should terminate the link. 2678 * Called by the NCPs during their tlf action handling. 2679 */ 2680 static void 2681 sppp_lcp_check_and_close(struct sppp *sp) 2682 { 2683 2684 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2685 /* don't bother, we are already going down */ 2686 return; 2687 2688 if (sppp_ncp_check(sp)) 2689 return; 2690 2691 lcp.Close(sp); 2692 } 2693 2694 2695 /* 2696 *--------------------------------------------------------------------------* 2697 * * 2698 * The IPCP implementation. * 2699 * * 2700 *--------------------------------------------------------------------------* 2701 */ 2702 2703 static void 2704 sppp_ipcp_init(struct sppp *sp) 2705 { 2706 sp->ipcp.opts = 0; 2707 sp->ipcp.flags = 0; 2708 sp->state[IDX_IPCP] = STATE_INITIAL; 2709 sp->fail_counter[IDX_IPCP] = 0; 2710 sp->pp_seq[IDX_IPCP] = 0; 2711 sp->pp_rseq[IDX_IPCP] = 0; 2712 callout_init(&sp->ch[IDX_IPCP]); 2713 } 2714 2715 static void 2716 sppp_ipcp_up(struct sppp *sp) 2717 { 2718 sppp_up_event(&ipcp, sp); 2719 } 2720 2721 static void 2722 sppp_ipcp_down(struct sppp *sp) 2723 { 2724 sppp_down_event(&ipcp, sp); 2725 } 2726 2727 static void 2728 sppp_ipcp_open(struct sppp *sp) 2729 { 2730 STDDCL; 2731 u_int32_t myaddr, hisaddr; 2732 2733 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 2734 sp->ipcp.req_myaddr = 0; 2735 sp->ipcp.req_hisaddr = 0; 2736 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 2737 2738 #ifdef INET 2739 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 2740 #else 2741 myaddr = hisaddr = 0; 2742 #endif 2743 /* 2744 * If we don't have his address, this probably means our 2745 * interface doesn't want to talk IP at all. (This could 2746 * be the case if somebody wants to speak only IPX, for 2747 * example.) Don't open IPCP in this case. 2748 */ 2749 if (hisaddr == 0) { 2750 /* XXX this message should go away */ 2751 if (debug) 2752 log(LOG_DEBUG, "%s: ipcp_open(): no IP interface\n", 2753 ifp->if_xname); 2754 return; 2755 } 2756 2757 if (myaddr == 0) { 2758 /* 2759 * I don't have an assigned address, so i need to 2760 * negotiate my address. 2761 */ 2762 sp->ipcp.flags |= IPCP_MYADDR_DYN; 2763 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 2764 } 2765 if (hisaddr == 1) { 2766 /* 2767 * XXX - remove this hack! 2768 * remote has no valid address, we need to get one assigned. 2769 */ 2770 sp->ipcp.flags |= IPCP_HISADDR_DYN; 2771 } 2772 sppp_open_event(&ipcp, sp); 2773 } 2774 2775 static void 2776 sppp_ipcp_close(struct sppp *sp) 2777 { 2778 STDDCL; 2779 2780 sppp_close_event(&ipcp, sp); 2781 #ifdef INET 2782 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 2783 /* 2784 * Some address was dynamic, clear it again. 2785 */ 2786 sppp_clear_ip_addrs(sp); 2787 #endif 2788 2789 if (sp->pp_saved_mtu > 0) { 2790 ifp->if_mtu = sp->pp_saved_mtu; 2791 sp->pp_saved_mtu = 0; 2792 if (debug) 2793 log(LOG_DEBUG, 2794 "%s: resetting MTU to %" PRIu64 " bytes\n", 2795 ifp->if_xname, ifp->if_mtu); 2796 } 2797 } 2798 2799 static void 2800 sppp_ipcp_TO(void *cookie) 2801 { 2802 sppp_to_event(&ipcp, (struct sppp *)cookie); 2803 } 2804 2805 /* 2806 * Analyze a configure request. Return true if it was agreeable, and 2807 * caused action sca, false if it has been rejected or nak'ed, and 2808 * caused action scn. (The return value is used to make the state 2809 * transition decision in the state automaton.) 2810 */ 2811 static int 2812 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2813 { 2814 u_char *buf, *r, *p; 2815 struct ifnet *ifp = &sp->pp_if; 2816 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 2817 u_int32_t hisaddr, desiredaddr; 2818 2819 len -= 4; 2820 origlen = len; 2821 /* 2822 * Make sure to allocate a buf that can at least hold a 2823 * conf-nak with an `address' option. We might need it below. 2824 */ 2825 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 2826 if (! buf) 2827 return (0); 2828 2829 /* pass 1: see if we can recognize them */ 2830 if (debug) 2831 log(LOG_DEBUG, "%s: ipcp parse opts:", 2832 ifp->if_xname); 2833 p = (void *)(h + 1); 2834 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2835 if (debug) 2836 addlog(" %s", sppp_ipcp_opt_name(*p)); 2837 switch (*p) { 2838 #ifdef notyet 2839 case IPCP_OPT_COMPRESSION: 2840 if (len >= 6 && p[1] >= 6) { 2841 /* correctly formed compress option */ 2842 continue; 2843 } 2844 if (debug) 2845 addlog(" [invalid]"); 2846 break; 2847 #endif 2848 case IPCP_OPT_ADDRESS: 2849 if (len >= 6 && p[1] == 6) { 2850 /* correctly formed address option */ 2851 continue; 2852 } 2853 if (debug) 2854 addlog(" [invalid]"); 2855 break; 2856 default: 2857 /* Others not supported. */ 2858 if (debug) 2859 addlog(" [rej]"); 2860 break; 2861 } 2862 /* Add the option to rejected list. */ 2863 bcopy (p, r, p[1]); 2864 r += p[1]; 2865 rlen += p[1]; 2866 } 2867 if (rlen) { 2868 if (debug) 2869 addlog(" send conf-rej\n"); 2870 sppp_cp_send(sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 2871 goto end; 2872 } else if (debug) 2873 addlog("\n"); 2874 2875 /* pass 2: parse option values */ 2876 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 2877 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 2878 else 2879 #ifdef INET 2880 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 2881 #else 2882 hisaddr = 0; 2883 #endif 2884 if (debug) 2885 log(LOG_DEBUG, "%s: ipcp parse opt values: ", 2886 ifp->if_xname); 2887 p = (void *)(h + 1); 2888 len = origlen; 2889 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2890 if (debug) 2891 addlog(" %s", sppp_ipcp_opt_name(*p)); 2892 switch (*p) { 2893 #ifdef notyet 2894 case IPCP_OPT_COMPRESSION: 2895 continue; 2896 #endif 2897 case IPCP_OPT_ADDRESS: 2898 desiredaddr = p[2] << 24 | p[3] << 16 | 2899 p[4] << 8 | p[5]; 2900 if (desiredaddr == hisaddr || 2901 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 2902 /* 2903 * Peer's address is same as our value, 2904 * this is agreeable. Gonna conf-ack 2905 * it. 2906 */ 2907 if (debug) 2908 addlog(" %s [ack]", 2909 sppp_dotted_quad(hisaddr)); 2910 /* record that we've seen it already */ 2911 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 2912 sp->ipcp.req_hisaddr = desiredaddr; 2913 hisaddr = desiredaddr; 2914 continue; 2915 } 2916 /* 2917 * The address wasn't agreeable. This is either 2918 * he sent us 0.0.0.0, asking to assign him an 2919 * address, or he send us another address not 2920 * matching our value. Either case, we gonna 2921 * conf-nak it with our value. 2922 */ 2923 if (debug) { 2924 if (desiredaddr == 0) 2925 addlog(" [addr requested]"); 2926 else 2927 addlog(" %s [not agreed]", 2928 sppp_dotted_quad(desiredaddr)); 2929 } 2930 2931 p[2] = hisaddr >> 24; 2932 p[3] = hisaddr >> 16; 2933 p[4] = hisaddr >> 8; 2934 p[5] = hisaddr; 2935 break; 2936 } 2937 /* Add the option to nak'ed list. */ 2938 bcopy (p, r, p[1]); 2939 r += p[1]; 2940 rlen += p[1]; 2941 } 2942 2943 /* 2944 * If we are about to conf-ack the request, but haven't seen 2945 * his address so far, gonna conf-nak it instead, with the 2946 * `address' option present and our idea of his address being 2947 * filled in there, to request negotiation of both addresses. 2948 * 2949 * XXX This can result in an endless req - nak loop if peer 2950 * doesn't want to send us his address. Q: What should we do 2951 * about it? XXX A: implement the max-failure counter. 2952 */ 2953 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 2954 buf[0] = IPCP_OPT_ADDRESS; 2955 buf[1] = 6; 2956 buf[2] = hisaddr >> 24; 2957 buf[3] = hisaddr >> 16; 2958 buf[4] = hisaddr >> 8; 2959 buf[5] = hisaddr; 2960 rlen = 6; 2961 if (debug) 2962 addlog(" still need hisaddr"); 2963 } 2964 2965 if (rlen) { 2966 if (debug) 2967 addlog(" send conf-nak\n"); 2968 sppp_cp_send(sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 2969 } else { 2970 if (debug) 2971 addlog(" send conf-ack\n"); 2972 sppp_cp_send(sp, PPP_IPCP, CONF_ACK, h->ident, origlen, h + 1); 2973 } 2974 2975 end: 2976 free(buf, M_TEMP); 2977 return (rlen == 0); 2978 } 2979 2980 /* 2981 * Analyze the IPCP Configure-Reject option list, and adjust our 2982 * negotiation. 2983 */ 2984 static void 2985 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2986 { 2987 u_char *buf, *p; 2988 struct ifnet *ifp = &sp->pp_if; 2989 int debug = ifp->if_flags & IFF_DEBUG; 2990 2991 len -= 4; 2992 buf = malloc (len, M_TEMP, M_NOWAIT); 2993 if (!buf) 2994 return; 2995 2996 if (debug) 2997 log(LOG_DEBUG, "%s: ipcp rej opts:", 2998 ifp->if_xname); 2999 3000 p = (void *)(h + 1); 3001 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3002 if (debug) 3003 addlog(" %s", sppp_ipcp_opt_name(*p)); 3004 switch (*p) { 3005 case IPCP_OPT_ADDRESS: 3006 /* 3007 * Peer doesn't grok address option. This is 3008 * bad. XXX Should we better give up here? 3009 */ 3010 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 3011 break; 3012 #ifdef notyet 3013 case IPCP_OPT_COMPRESS: 3014 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 3015 break; 3016 #endif 3017 } 3018 } 3019 if (debug) 3020 addlog("\n"); 3021 free(buf, M_TEMP); 3022 return; 3023 } 3024 3025 /* 3026 * Analyze the IPCP Configure-NAK option list, and adjust our 3027 * negotiation. 3028 */ 3029 static void 3030 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3031 { 3032 u_char *p; 3033 struct ifnet *ifp = &sp->pp_if; 3034 int debug = ifp->if_flags & IFF_DEBUG; 3035 u_int32_t wantaddr; 3036 3037 len -= 4; 3038 3039 if (debug) 3040 log(LOG_DEBUG, "%s: ipcp nak opts:", 3041 ifp->if_xname); 3042 3043 p = (void *)(h + 1); 3044 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3045 if (debug) 3046 addlog(" %s", sppp_ipcp_opt_name(*p)); 3047 switch (*p) { 3048 case IPCP_OPT_ADDRESS: 3049 /* 3050 * Peer doesn't like our local IP address. See 3051 * if we can do something for him. We'll drop 3052 * him our address then. 3053 */ 3054 if (len >= 6 && p[1] == 6) { 3055 wantaddr = p[2] << 24 | p[3] << 16 | 3056 p[4] << 8 | p[5]; 3057 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3058 if (debug) 3059 addlog(" [wantaddr %s]", 3060 sppp_dotted_quad(wantaddr)); 3061 /* 3062 * When doing dynamic address assignment, 3063 * we accept his offer. Otherwise, we 3064 * ignore it and thus continue to negotiate 3065 * our already existing value. 3066 */ 3067 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3068 if (debug) 3069 addlog(" [agree]"); 3070 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3071 sp->ipcp.req_myaddr = wantaddr; 3072 } 3073 } 3074 break; 3075 3076 case IPCP_OPT_PRIMDNS: 3077 if (len >= 6 && p[1] == 6) { 3078 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3079 p[4] << 8 | p[5]; 3080 } 3081 break; 3082 3083 case IPCP_OPT_SECDNS: 3084 if (len >= 6 && p[1] == 6) { 3085 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3086 p[4] << 8 | p[5]; 3087 } 3088 break; 3089 #ifdef notyet 3090 case IPCP_OPT_COMPRESS: 3091 /* 3092 * Peer wants different compression parameters. 3093 */ 3094 break; 3095 #endif 3096 } 3097 } 3098 if (debug) 3099 addlog("\n"); 3100 return; 3101 } 3102 3103 static void 3104 sppp_ipcp_tlu(struct sppp *sp) 3105 { 3106 #ifdef INET 3107 /* we are up. Set addresses and notify anyone interested */ 3108 STDDCL; 3109 u_int32_t myaddr, hisaddr; 3110 3111 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3112 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 3113 myaddr = sp->ipcp.req_myaddr; 3114 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 3115 hisaddr = sp->ipcp.req_hisaddr; 3116 sppp_set_ip_addrs(sp, myaddr, hisaddr); 3117 3118 if (ifp->if_mtu > sp->lcp.their_mru) { 3119 sp->pp_saved_mtu = ifp->if_mtu; 3120 ifp->if_mtu = sp->lcp.their_mru; 3121 if (debug) 3122 log(LOG_DEBUG, 3123 "%s: setting MTU to %" PRIu64 " bytes\n", 3124 ifp->if_xname, ifp->if_mtu); 3125 } 3126 3127 if (sp->pp_con) 3128 sp->pp_con(sp); 3129 #endif 3130 } 3131 3132 static void 3133 sppp_ipcp_tld(struct sppp *sp) 3134 { 3135 } 3136 3137 static void 3138 sppp_ipcp_tls(struct sppp *sp) 3139 { 3140 /* indicate to LCP that it must stay alive */ 3141 sp->lcp.protos |= (1 << IDX_IPCP); 3142 } 3143 3144 static void 3145 sppp_ipcp_tlf(struct sppp *sp) 3146 { 3147 /* we no longer need LCP */ 3148 sp->lcp.protos &= ~(1 << IDX_IPCP); 3149 } 3150 3151 static void 3152 sppp_ipcp_scr(struct sppp *sp) 3153 { 3154 char opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3155 #ifdef INET 3156 u_int32_t ouraddr; 3157 #endif 3158 int i = 0; 3159 3160 #ifdef notyet 3161 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3162 opt[i++] = IPCP_OPT_COMPRESSION; 3163 opt[i++] = 6; 3164 opt[i++] = 0; /* VJ header compression */ 3165 opt[i++] = 0x2d; /* VJ header compression */ 3166 opt[i++] = max_slot_id; 3167 opt[i++] = comp_slot_id; 3168 } 3169 #endif 3170 3171 #ifdef INET 3172 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3173 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3174 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3175 else 3176 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3177 opt[i++] = IPCP_OPT_ADDRESS; 3178 opt[i++] = 6; 3179 opt[i++] = ouraddr >> 24; 3180 opt[i++] = ouraddr >> 16; 3181 opt[i++] = ouraddr >> 8; 3182 opt[i++] = ouraddr; 3183 } 3184 #endif 3185 3186 if (sp->query_dns & 1) { 3187 opt[i++] = IPCP_OPT_PRIMDNS; 3188 opt[i++] = 6; 3189 opt[i++] = sp->dns_addrs[0] >> 24; 3190 opt[i++] = sp->dns_addrs[0] >> 16; 3191 opt[i++] = sp->dns_addrs[0] >> 8; 3192 opt[i++] = sp->dns_addrs[0]; 3193 } 3194 if (sp->query_dns & 2) { 3195 opt[i++] = IPCP_OPT_SECDNS; 3196 opt[i++] = 6; 3197 opt[i++] = sp->dns_addrs[1] >> 24; 3198 opt[i++] = sp->dns_addrs[1] >> 16; 3199 opt[i++] = sp->dns_addrs[1] >> 8; 3200 opt[i++] = sp->dns_addrs[1]; 3201 } 3202 3203 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3204 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3205 } 3206 3207 3208 /* 3209 *--------------------------------------------------------------------------* 3210 * * 3211 * The IPv6CP implementation. * 3212 * * 3213 *--------------------------------------------------------------------------* 3214 */ 3215 3216 #ifdef INET6 3217 static void 3218 sppp_ipv6cp_init(struct sppp *sp) 3219 { 3220 sp->ipv6cp.opts = 0; 3221 sp->ipv6cp.flags = 0; 3222 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3223 sp->fail_counter[IDX_IPV6CP] = 0; 3224 sp->pp_seq[IDX_IPV6CP] = 0; 3225 sp->pp_rseq[IDX_IPV6CP] = 0; 3226 callout_init(&sp->ch[IDX_IPV6CP]); 3227 } 3228 3229 static void 3230 sppp_ipv6cp_up(struct sppp *sp) 3231 { 3232 sppp_up_event(&ipv6cp, sp); 3233 } 3234 3235 static void 3236 sppp_ipv6cp_down(struct sppp *sp) 3237 { 3238 sppp_down_event(&ipv6cp, sp); 3239 } 3240 3241 static void 3242 sppp_ipv6cp_open(struct sppp *sp) 3243 { 3244 STDDCL; 3245 struct in6_addr myaddr, hisaddr; 3246 3247 #ifdef IPV6CP_MYIFID_DYN 3248 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3249 #else 3250 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3251 #endif 3252 3253 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3254 /* 3255 * If we don't have our address, this probably means our 3256 * interface doesn't want to talk IPv6 at all. (This could 3257 * be the case if somebody wants to speak only IPX, for 3258 * example.) Don't open IPv6CP in this case. 3259 */ 3260 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3261 /* XXX this message should go away */ 3262 if (debug) 3263 log(LOG_DEBUG, "%s: ipv6cp_open(): no IPv6 interface\n", 3264 ifp->if_xname); 3265 return; 3266 } 3267 3268 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3269 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3270 sppp_open_event(&ipv6cp, sp); 3271 } 3272 3273 static void 3274 sppp_ipv6cp_close(struct sppp *sp) 3275 { 3276 sppp_close_event(&ipv6cp, sp); 3277 } 3278 3279 static void 3280 sppp_ipv6cp_TO(void *cookie) 3281 { 3282 sppp_to_event(&ipv6cp, (struct sppp *)cookie); 3283 } 3284 3285 /* 3286 * Analyze a configure request. Return true if it was agreeable, and 3287 * caused action sca, false if it has been rejected or nak'ed, and 3288 * caused action scn. (The return value is used to make the state 3289 * transition decision in the state automaton.) 3290 */ 3291 static int 3292 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3293 { 3294 u_char *buf, *r, *p; 3295 struct ifnet *ifp = &sp->pp_if; 3296 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3297 struct in6_addr myaddr, desiredaddr, suggestaddr; 3298 int ifidcount; 3299 int type; 3300 int collision, nohisaddr; 3301 3302 len -= 4; 3303 origlen = len; 3304 /* 3305 * Make sure to allocate a buf that can at least hold a 3306 * conf-nak with an `address' option. We might need it below. 3307 */ 3308 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 3309 if (! buf) 3310 return (0); 3311 3312 /* pass 1: see if we can recognize them */ 3313 if (debug) 3314 log(LOG_DEBUG, "%s: ipv6cp parse opts:", 3315 ifp->if_xname); 3316 p = (void *)(h + 1); 3317 ifidcount = 0; 3318 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3319 if (debug) 3320 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3321 switch (*p) { 3322 case IPV6CP_OPT_IFID: 3323 if (len >= 10 && p[1] == 10 && ifidcount == 0) { 3324 /* correctly formed address option */ 3325 ifidcount++; 3326 continue; 3327 } 3328 if (debug) 3329 addlog(" [invalid]"); 3330 break; 3331 #ifdef notyet 3332 case IPV6CP_OPT_COMPRESSION: 3333 if (len >= 4 && p[1] >= 4) { 3334 /* correctly formed compress option */ 3335 continue; 3336 } 3337 if (debug) 3338 addlog(" [invalid]"); 3339 break; 3340 #endif 3341 default: 3342 /* Others not supported. */ 3343 if (debug) 3344 addlog(" [rej]"); 3345 break; 3346 } 3347 /* Add the option to rejected list. */ 3348 bcopy (p, r, p[1]); 3349 r += p[1]; 3350 rlen += p[1]; 3351 } 3352 if (rlen) { 3353 if (debug) 3354 addlog(" send conf-rej\n"); 3355 sppp_cp_send(sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3356 goto end; 3357 } else if (debug) 3358 addlog("\n"); 3359 3360 /* pass 2: parse option values */ 3361 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3362 if (debug) 3363 log(LOG_DEBUG, "%s: ipv6cp parse opt values: ", 3364 ifp->if_xname); 3365 p = (void *)(h + 1); 3366 len = origlen; 3367 type = CONF_ACK; 3368 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3369 if (debug) 3370 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3371 switch (*p) { 3372 #ifdef notyet 3373 case IPV6CP_OPT_COMPRESSION: 3374 continue; 3375 #endif 3376 case IPV6CP_OPT_IFID: 3377 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3378 bcopy(&p[2], &desiredaddr.s6_addr[8], 8); 3379 collision = (memcmp(&desiredaddr.s6_addr[8], 3380 &myaddr.s6_addr[8], 8) == 0); 3381 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3382 3383 desiredaddr.s6_addr16[0] = htons(0xfe80); 3384 (void)in6_setscope(&desiredaddr, &sp->pp_if, NULL); 3385 3386 if (!collision && !nohisaddr) { 3387 /* no collision, hisaddr known - Conf-Ack */ 3388 type = CONF_ACK; 3389 3390 if (debug) { 3391 addlog(" %s [%s]", 3392 ip6_sprintf(&desiredaddr), 3393 sppp_cp_type_name(type)); 3394 } 3395 continue; 3396 } 3397 3398 memset(&suggestaddr, 0, sizeof(&suggestaddr)); 3399 if (collision && nohisaddr) { 3400 /* collision, hisaddr unknown - Conf-Rej */ 3401 type = CONF_REJ; 3402 memset(&p[2], 0, 8); 3403 } else { 3404 /* 3405 * - no collision, hisaddr unknown, or 3406 * - collision, hisaddr known 3407 * Conf-Nak, suggest hisaddr 3408 */ 3409 type = CONF_NAK; 3410 sppp_suggest_ip6_addr(sp, &suggestaddr); 3411 bcopy(&suggestaddr.s6_addr[8], &p[2], 8); 3412 } 3413 if (debug) 3414 addlog(" %s [%s]", ip6_sprintf(&desiredaddr), 3415 sppp_cp_type_name(type)); 3416 break; 3417 } 3418 /* Add the option to nak'ed list. */ 3419 bcopy (p, r, p[1]); 3420 r += p[1]; 3421 rlen += p[1]; 3422 } 3423 3424 if (rlen == 0 && type == CONF_ACK) { 3425 if (debug) 3426 addlog(" send %s\n", sppp_cp_type_name(type)); 3427 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, origlen, h + 1); 3428 } else { 3429 #ifdef notdef 3430 if (type == CONF_ACK) 3431 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3432 #endif 3433 3434 if (debug) { 3435 addlog(" send %s suggest %s\n", 3436 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr)); 3437 } 3438 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3439 } 3440 3441 end: 3442 free(buf, M_TEMP); 3443 return (rlen == 0); 3444 } 3445 3446 /* 3447 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3448 * negotiation. 3449 */ 3450 static void 3451 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3452 { 3453 u_char *buf, *p; 3454 struct ifnet *ifp = &sp->pp_if; 3455 int debug = ifp->if_flags & IFF_DEBUG; 3456 3457 len -= 4; 3458 buf = malloc (len, M_TEMP, M_NOWAIT); 3459 if (!buf) 3460 return; 3461 3462 if (debug) 3463 log(LOG_DEBUG, "%s: ipv6cp rej opts:", 3464 ifp->if_xname); 3465 3466 p = (void *)(h + 1); 3467 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3468 if (debug) 3469 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3470 switch (*p) { 3471 case IPV6CP_OPT_IFID: 3472 /* 3473 * Peer doesn't grok address option. This is 3474 * bad. XXX Should we better give up here? 3475 */ 3476 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3477 break; 3478 #ifdef notyet 3479 case IPV6CP_OPT_COMPRESS: 3480 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3481 break; 3482 #endif 3483 } 3484 } 3485 if (debug) 3486 addlog("\n"); 3487 free(buf, M_TEMP); 3488 return; 3489 } 3490 3491 /* 3492 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3493 * negotiation. 3494 */ 3495 static void 3496 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3497 { 3498 u_char *buf, *p; 3499 struct ifnet *ifp = &sp->pp_if; 3500 int debug = ifp->if_flags & IFF_DEBUG; 3501 struct in6_addr suggestaddr; 3502 3503 len -= 4; 3504 buf = malloc (len, M_TEMP, M_NOWAIT); 3505 if (!buf) 3506 return; 3507 3508 if (debug) 3509 log(LOG_DEBUG, "%s: ipv6cp nak opts:", 3510 ifp->if_xname); 3511 3512 p = (void *)(h + 1); 3513 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3514 if (debug) 3515 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3516 switch (*p) { 3517 case IPV6CP_OPT_IFID: 3518 /* 3519 * Peer doesn't like our local ifid. See 3520 * if we can do something for him. We'll drop 3521 * him our address then. 3522 */ 3523 if (len < 10 || p[1] != 10) 3524 break; 3525 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3526 suggestaddr.s6_addr16[0] = htons(0xfe80); 3527 (void)in6_setscope(&suggestaddr, &sp->pp_if, NULL); 3528 bcopy(&p[2], &suggestaddr.s6_addr[8], 8); 3529 3530 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3531 if (debug) 3532 addlog(" [suggestaddr %s]", 3533 ip6_sprintf(&suggestaddr)); 3534 #ifdef IPV6CP_MYIFID_DYN 3535 /* 3536 * When doing dynamic address assignment, 3537 * we accept his offer. 3538 */ 3539 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3540 struct in6_addr lastsuggest; 3541 /* 3542 * If <suggested myaddr from peer> equals to 3543 * <hisaddr we have suggested last time>, 3544 * we have a collision. generate new random 3545 * ifid. 3546 */ 3547 sppp_suggest_ip6_addr(&lastsuggest); 3548 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3549 lastsuggest)) { 3550 if (debug) 3551 addlog(" [random]"); 3552 sppp_gen_ip6_addr(sp, &suggestaddr); 3553 } 3554 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3555 if (debug) 3556 addlog(" [agree]"); 3557 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3558 } 3559 #else 3560 /* 3561 * Since we do not do dynamic address assignment, 3562 * we ignore it and thus continue to negotiate 3563 * our already existing value. This can possibly 3564 * go into infinite request-reject loop. 3565 * 3566 * This is not likely because we normally use 3567 * ifid based on MAC-address. 3568 * If you have no ethernet card on the node, too bad. 3569 * XXX should we use fail_counter? 3570 */ 3571 #endif 3572 break; 3573 #ifdef notyet 3574 case IPV6CP_OPT_COMPRESS: 3575 /* 3576 * Peer wants different compression parameters. 3577 */ 3578 break; 3579 #endif 3580 } 3581 } 3582 if (debug) 3583 addlog("\n"); 3584 free(buf, M_TEMP); 3585 return; 3586 } 3587 3588 static void 3589 sppp_ipv6cp_tlu(struct sppp *sp) 3590 { 3591 /* we are up - notify isdn daemon */ 3592 if (sp->pp_con) 3593 sp->pp_con(sp); 3594 } 3595 3596 static void 3597 sppp_ipv6cp_tld(struct sppp *sp) 3598 { 3599 } 3600 3601 static void 3602 sppp_ipv6cp_tls(struct sppp *sp) 3603 { 3604 /* indicate to LCP that it must stay alive */ 3605 sp->lcp.protos |= (1 << IDX_IPV6CP); 3606 } 3607 3608 static void 3609 sppp_ipv6cp_tlf(struct sppp *sp) 3610 { 3611 /* we no longer need LCP */ 3612 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3613 } 3614 3615 static void 3616 sppp_ipv6cp_scr(struct sppp *sp) 3617 { 3618 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3619 struct in6_addr ouraddr; 3620 int i = 0; 3621 3622 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3623 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3624 opt[i++] = IPV6CP_OPT_IFID; 3625 opt[i++] = 10; 3626 bcopy(&ouraddr.s6_addr[8], &opt[i], 8); 3627 i += 8; 3628 } 3629 3630 #ifdef notyet 3631 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 3632 opt[i++] = IPV6CP_OPT_COMPRESSION; 3633 opt[i++] = 4; 3634 opt[i++] = 0; /* TBD */ 3635 opt[i++] = 0; /* TBD */ 3636 /* variable length data may follow */ 3637 } 3638 #endif 3639 3640 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 3641 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 3642 } 3643 #else /*INET6*/ 3644 static void sppp_ipv6cp_init(struct sppp *sp) 3645 { 3646 } 3647 3648 static void sppp_ipv6cp_up(struct sppp *sp) 3649 { 3650 } 3651 3652 static void sppp_ipv6cp_down(struct sppp *sp) 3653 { 3654 } 3655 3656 3657 static void sppp_ipv6cp_open(struct sppp *sp) 3658 { 3659 } 3660 3661 static void sppp_ipv6cp_close(struct sppp *sp) 3662 { 3663 } 3664 3665 static void sppp_ipv6cp_TO(void *sp) 3666 { 3667 } 3668 3669 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3670 { 3671 return 0; 3672 } 3673 3674 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3675 { 3676 } 3677 3678 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3679 { 3680 } 3681 3682 static void sppp_ipv6cp_tlu(struct sppp *sp) 3683 { 3684 } 3685 3686 static void sppp_ipv6cp_tld(struct sppp *sp) 3687 { 3688 } 3689 3690 static void sppp_ipv6cp_tls(struct sppp *sp) 3691 { 3692 } 3693 3694 static void sppp_ipv6cp_tlf(struct sppp *sp) 3695 { 3696 } 3697 3698 static void sppp_ipv6cp_scr(struct sppp *sp) 3699 { 3700 } 3701 #endif /*INET6*/ 3702 3703 3704 /* 3705 *--------------------------------------------------------------------------* 3706 * * 3707 * The CHAP implementation. * 3708 * * 3709 *--------------------------------------------------------------------------* 3710 */ 3711 3712 /* 3713 * The authentication protocols don't employ a full-fledged state machine as 3714 * the control protocols do, since they do have Open and Close events, but 3715 * not Up and Down, nor are they explicitly terminated. Also, use of the 3716 * authentication protocols may be different in both directions (this makes 3717 * sense, think of a machine that never accepts incoming calls but only 3718 * calls out, it doesn't require the called party to authenticate itself). 3719 * 3720 * Our state machine for the local authentication protocol (we are requesting 3721 * the peer to authenticate) looks like: 3722 * 3723 * RCA- 3724 * +--------------------------------------------+ 3725 * V scn,tld| 3726 * +--------+ Close +---------+ RCA+ 3727 * | |<----------------------------------| |------+ 3728 * +--->| Closed | TO* | Opened | sca | 3729 * | | |-----+ +-------| |<-----+ 3730 * | +--------+ irc | | +---------+ 3731 * | ^ | | ^ 3732 * | | | | | 3733 * | | | | | 3734 * | TO-| | | | 3735 * | |tld TO+ V | | 3736 * | | +------->+ | | 3737 * | | | | | | 3738 * | +--------+ V | | 3739 * | | |<----+<--------------------+ | 3740 * | | Req- | scr | 3741 * | | Sent | | 3742 * | | | | 3743 * | +--------+ | 3744 * | RCA- | | RCA+ | 3745 * +------+ +------------------------------------------+ 3746 * scn,tld sca,irc,ict,tlu 3747 * 3748 * 3749 * with: 3750 * 3751 * Open: LCP reached authentication phase 3752 * Close: LCP reached terminate phase 3753 * 3754 * RCA+: received reply (pap-req, chap-response), acceptable 3755 * RCN: received reply (pap-req, chap-response), not acceptable 3756 * TO+: timeout with restart counter >= 0 3757 * TO-: timeout with restart counter < 0 3758 * TO*: reschedule timeout for CHAP 3759 * 3760 * scr: send request packet (none for PAP, chap-challenge) 3761 * sca: send ack packet (pap-ack, chap-success) 3762 * scn: send nak packet (pap-nak, chap-failure) 3763 * ict: initialize re-challenge timer (CHAP only) 3764 * 3765 * tlu: this-layer-up, LCP reaches network phase 3766 * tld: this-layer-down, LCP enters terminate phase 3767 * 3768 * Note that in CHAP mode, after sending a new challenge, while the state 3769 * automaton falls back into Req-Sent state, it doesn't signal a tld 3770 * event to LCP, so LCP remains in network phase. Only after not getting 3771 * any response (or after getting an unacceptable response), CHAP closes, 3772 * causing LCP to enter terminate phase. 3773 * 3774 * With PAP, there is no initial request that can be sent. The peer is 3775 * expected to send one based on the successful negotiation of PAP as 3776 * the authentication protocol during the LCP option negotiation. 3777 * 3778 * Incoming authentication protocol requests (remote requests 3779 * authentication, we are peer) don't employ a state machine at all, 3780 * they are simply answered. Some peers [Ascend P50 firmware rev 3781 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 3782 * still in authentication phase (thereby violating the standard that 3783 * demands that these NCP packets are to be discarded), so we keep 3784 * track of the peer demanding us to authenticate, and only proceed to 3785 * phase network once we've seen a positive acknowledge for the 3786 * authentication. 3787 */ 3788 3789 /* 3790 * Handle incoming CHAP packets. 3791 */ 3792 void 3793 sppp_chap_input(struct sppp *sp, struct mbuf *m) 3794 { 3795 STDDCL; 3796 struct lcp_header *h; 3797 int len, x; 3798 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 3799 int value_len, name_len; 3800 MD5_CTX ctx; 3801 3802 len = m->m_pkthdr.len; 3803 if (len < 4) { 3804 if (debug) 3805 log(LOG_DEBUG, 3806 "%s: chap invalid packet length: %d bytes\n", 3807 ifp->if_xname, len); 3808 return; 3809 } 3810 h = mtod(m, struct lcp_header *); 3811 if (len > ntohs(h->len)) 3812 len = ntohs(h->len); 3813 3814 switch (h->type) { 3815 /* challenge, failure and success are his authproto */ 3816 case CHAP_CHALLENGE: 3817 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 3818 /* can't do anything usefull */ 3819 sp->pp_auth_failures++; 3820 printf("%s: chap input without my name and my secret being set\n", 3821 ifp->if_xname); 3822 break; 3823 } 3824 value = 1 + (u_char *)(h + 1); 3825 value_len = value[-1]; 3826 name = value + value_len; 3827 name_len = len - value_len - 5; 3828 if (name_len < 0) { 3829 if (debug) { 3830 log(LOG_DEBUG, 3831 "%s: chap corrupted challenge " 3832 "<%s id=0x%x len=%d", 3833 ifp->if_xname, 3834 sppp_auth_type_name(PPP_CHAP, h->type), 3835 h->ident, ntohs(h->len)); 3836 if (len > 4) 3837 sppp_print_bytes((u_char *)(h + 1), 3838 len - 4); 3839 addlog(">\n"); 3840 } 3841 break; 3842 } 3843 3844 if (debug) { 3845 log(LOG_DEBUG, 3846 "%s: chap input <%s id=0x%x len=%d name=", 3847 ifp->if_xname, 3848 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 3849 ntohs(h->len)); 3850 sppp_print_string((char *) name, name_len); 3851 addlog(" value-size=%d value=", value_len); 3852 sppp_print_bytes(value, value_len); 3853 addlog(">\n"); 3854 } 3855 3856 /* Compute reply value. */ 3857 MD5Init(&ctx); 3858 MD5Update(&ctx, &h->ident, 1); 3859 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 3860 MD5Update(&ctx, value, value_len); 3861 MD5Final(digest, &ctx); 3862 dsize = sizeof digest; 3863 3864 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 3865 sizeof dsize, (const char *)&dsize, 3866 sizeof digest, digest, 3867 sp->myauth.name_len, 3868 sp->myauth.name, 3869 0); 3870 break; 3871 3872 case CHAP_SUCCESS: 3873 if (debug) { 3874 log(LOG_DEBUG, "%s: chap success", 3875 ifp->if_xname); 3876 if (len > 4) { 3877 addlog(": "); 3878 sppp_print_string((char *)(h + 1), len - 4); 3879 } 3880 addlog("\n"); 3881 } 3882 x = splnet(); 3883 sp->pp_auth_failures = 0; 3884 sp->pp_flags &= ~PP_NEEDAUTH; 3885 if (sp->myauth.proto == PPP_CHAP && 3886 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 3887 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 3888 /* 3889 * We are authenticator for CHAP but didn't 3890 * complete yet. Leave it to tlu to proceed 3891 * to network phase. 3892 */ 3893 splx(x); 3894 break; 3895 } 3896 splx(x); 3897 sppp_phase_network(sp); 3898 break; 3899 3900 case CHAP_FAILURE: 3901 x = splnet(); 3902 sp->pp_auth_failures++; 3903 splx(x); 3904 if (debug) { 3905 log(LOG_INFO, "%s: chap failure", 3906 ifp->if_xname); 3907 if (len > 4) { 3908 addlog(": "); 3909 sppp_print_string((char *)(h + 1), len - 4); 3910 } 3911 addlog("\n"); 3912 } else 3913 log(LOG_INFO, "%s: chap failure\n", 3914 ifp->if_xname); 3915 /* await LCP shutdown by authenticator */ 3916 break; 3917 3918 /* response is my authproto */ 3919 case CHAP_RESPONSE: 3920 if (sp->hisauth.secret == NULL) { 3921 /* can't do anything usefull */ 3922 printf("%s: chap input without his secret being set\n", 3923 ifp->if_xname); 3924 break; 3925 } 3926 value = 1 + (u_char *)(h + 1); 3927 value_len = value[-1]; 3928 name = value + value_len; 3929 name_len = len - value_len - 5; 3930 if (name_len < 0) { 3931 if (debug) { 3932 log(LOG_DEBUG, 3933 "%s: chap corrupted response " 3934 "<%s id=0x%x len=%d", 3935 ifp->if_xname, 3936 sppp_auth_type_name(PPP_CHAP, h->type), 3937 h->ident, ntohs(h->len)); 3938 if (len > 4) 3939 sppp_print_bytes((u_char *)(h + 1), 3940 len - 4); 3941 addlog(">\n"); 3942 } 3943 break; 3944 } 3945 if (h->ident != sp->confid[IDX_CHAP]) { 3946 if (debug) 3947 log(LOG_DEBUG, 3948 "%s: chap dropping response for old ID " 3949 "(got %d, expected %d)\n", 3950 ifp->if_xname, 3951 h->ident, sp->confid[IDX_CHAP]); 3952 break; 3953 } 3954 if (sp->hisauth.name != NULL && 3955 (name_len != sp->hisauth.name_len 3956 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 3957 log(LOG_INFO, "%s: chap response, his name ", 3958 ifp->if_xname); 3959 sppp_print_string(name, name_len); 3960 addlog(" != expected "); 3961 sppp_print_string(sp->hisauth.name, 3962 sp->hisauth.name_len); 3963 addlog("\n"); 3964 goto chap_failure; 3965 } 3966 if (debug) { 3967 log(LOG_DEBUG, "%s: chap input(%s) " 3968 "<%s id=0x%x len=%d name=", 3969 ifp->if_xname, 3970 sppp_state_name(sp->state[IDX_CHAP]), 3971 sppp_auth_type_name(PPP_CHAP, h->type), 3972 h->ident, ntohs(h->len)); 3973 sppp_print_string((char *)name, name_len); 3974 addlog(" value-size=%d value=", value_len); 3975 sppp_print_bytes(value, value_len); 3976 addlog(">\n"); 3977 } 3978 if (value_len != sizeof(sp->myauth.challenge)) { 3979 if (debug) 3980 log(LOG_DEBUG, 3981 "%s: chap bad hash value length: " 3982 "%d bytes, should be %ld\n", 3983 ifp->if_xname, value_len, 3984 (long) sizeof(sp->myauth.challenge)); 3985 goto chap_failure; 3986 } 3987 3988 MD5Init(&ctx); 3989 MD5Update(&ctx, &h->ident, 1); 3990 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 3991 MD5Update(&ctx, sp->myauth.challenge, sizeof(sp->myauth.challenge)); 3992 MD5Final(digest, &ctx); 3993 3994 #define FAILMSG "Failed..." 3995 #define SUCCMSG "Welcome!" 3996 3997 if (value_len != sizeof digest || 3998 memcmp(digest, value, value_len) != 0) { 3999 chap_failure: 4000 /* action scn, tld */ 4001 x = splnet(); 4002 sp->pp_auth_failures++; 4003 splx(x); 4004 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 4005 sizeof(FAILMSG) - 1, (const u_char *)FAILMSG, 4006 0); 4007 chap.tld(sp); 4008 break; 4009 } 4010 sp->pp_auth_failures = 0; 4011 /* action sca, perhaps tlu */ 4012 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 4013 sp->state[IDX_CHAP] == STATE_OPENED) 4014 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 4015 sizeof(SUCCMSG) - 1, (const u_char *)SUCCMSG, 4016 0); 4017 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 4018 sppp_cp_change_state(&chap, sp, STATE_OPENED); 4019 chap.tlu(sp); 4020 } 4021 break; 4022 4023 default: 4024 /* Unknown CHAP packet type -- ignore. */ 4025 if (debug) { 4026 log(LOG_DEBUG, "%s: chap unknown input(%s) " 4027 "<0x%x id=0x%xh len=%d", 4028 ifp->if_xname, 4029 sppp_state_name(sp->state[IDX_CHAP]), 4030 h->type, h->ident, ntohs(h->len)); 4031 if (len > 4) 4032 sppp_print_bytes((u_char *)(h + 1), len - 4); 4033 addlog(">\n"); 4034 } 4035 break; 4036 4037 } 4038 } 4039 4040 static void 4041 sppp_chap_init(struct sppp *sp) 4042 { 4043 /* Chap doesn't have STATE_INITIAL at all. */ 4044 sp->state[IDX_CHAP] = STATE_CLOSED; 4045 sp->fail_counter[IDX_CHAP] = 0; 4046 sp->pp_seq[IDX_CHAP] = 0; 4047 sp->pp_rseq[IDX_CHAP] = 0; 4048 callout_init(&sp->ch[IDX_CHAP]); 4049 } 4050 4051 static void 4052 sppp_chap_open(struct sppp *sp) 4053 { 4054 if (sp->myauth.proto == PPP_CHAP && 4055 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4056 /* we are authenticator for CHAP, start it */ 4057 chap.scr(sp); 4058 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4059 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4060 } 4061 /* nothing to be done if we are peer, await a challenge */ 4062 } 4063 4064 static void 4065 sppp_chap_close(struct sppp *sp) 4066 { 4067 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4068 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4069 } 4070 4071 static void 4072 sppp_chap_TO(void *cookie) 4073 { 4074 struct sppp *sp = (struct sppp *)cookie; 4075 STDDCL; 4076 int s; 4077 4078 s = splnet(); 4079 if (debug) 4080 log(LOG_DEBUG, "%s: chap TO(%s) rst_counter = %d\n", 4081 ifp->if_xname, 4082 sppp_state_name(sp->state[IDX_CHAP]), 4083 sp->rst_counter[IDX_CHAP]); 4084 4085 if (--sp->rst_counter[IDX_CHAP] < 0) 4086 /* TO- event */ 4087 switch (sp->state[IDX_CHAP]) { 4088 case STATE_REQ_SENT: 4089 chap.tld(sp); 4090 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4091 break; 4092 } 4093 else 4094 /* TO+ (or TO*) event */ 4095 switch (sp->state[IDX_CHAP]) { 4096 case STATE_OPENED: 4097 /* TO* event */ 4098 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4099 /* fall through */ 4100 case STATE_REQ_SENT: 4101 chap.scr(sp); 4102 /* sppp_cp_change_state() will restart the timer */ 4103 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4104 break; 4105 } 4106 4107 splx(s); 4108 } 4109 4110 static void 4111 sppp_chap_tlu(struct sppp *sp) 4112 { 4113 STDDCL; 4114 int i, x; 4115 4116 i = 0; 4117 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4118 4119 /* 4120 * Some broken CHAP implementations (Conware CoNet, firmware 4121 * 4.0.?) don't want to re-authenticate their CHAP once the 4122 * initial challenge-response exchange has taken place. 4123 * Provide for an option to avoid rechallenges. 4124 */ 4125 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4126 /* 4127 * Compute the re-challenge timeout. This will yield 4128 * a number between 300 and 810 seconds. 4129 */ 4130 i = 300 + ((unsigned)(arc4random() & 0xff00) >> 7); 4131 4132 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4133 } 4134 4135 if (debug) { 4136 log(LOG_DEBUG, 4137 "%s: chap %s, ", 4138 ifp->if_xname, 4139 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu"); 4140 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) 4141 addlog("next re-challenge in %d seconds\n", i); 4142 else 4143 addlog("re-challenging supressed\n"); 4144 } 4145 4146 x = splnet(); 4147 sp->pp_auth_failures = 0; 4148 /* indicate to LCP that we need to be closed down */ 4149 sp->lcp.protos |= (1 << IDX_CHAP); 4150 4151 if (sp->pp_flags & PP_NEEDAUTH) { 4152 /* 4153 * Remote is authenticator, but his auth proto didn't 4154 * complete yet. Defer the transition to network 4155 * phase. 4156 */ 4157 splx(x); 4158 return; 4159 } 4160 splx(x); 4161 4162 /* 4163 * If we are already in phase network, we are done here. This 4164 * is the case if this is a dummy tlu event after a re-challenge. 4165 */ 4166 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4167 sppp_phase_network(sp); 4168 } 4169 4170 static void 4171 sppp_chap_tld(struct sppp *sp) 4172 { 4173 STDDCL; 4174 4175 if (debug) 4176 log(LOG_DEBUG, "%s: chap tld\n", ifp->if_xname); 4177 callout_stop(&sp->ch[IDX_CHAP]); 4178 sp->lcp.protos &= ~(1 << IDX_CHAP); 4179 4180 lcp.Close(sp); 4181 } 4182 4183 static void 4184 sppp_chap_scr(struct sppp *sp) 4185 { 4186 u_int32_t *ch; 4187 u_char clen; 4188 4189 if (sp->myauth.name == NULL) { 4190 /* can't do anything usefull */ 4191 printf("%s: chap starting without my name being set\n", 4192 sp->pp_if.if_xname); 4193 return; 4194 } 4195 4196 /* Compute random challenge. */ 4197 ch = (u_int32_t *)sp->myauth.challenge; 4198 ch[0] = arc4random(); 4199 ch[1] = arc4random(); 4200 ch[2] = arc4random(); 4201 ch[3] = arc4random(); 4202 clen = 16; /* 4 * sizeof(u_int32_t) */ 4203 4204 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4205 4206 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4207 sizeof clen, (const char *)&clen, 4208 sizeof(sp->myauth.challenge), sp->myauth.challenge, 4209 sp->myauth.name_len, 4210 sp->myauth.name, 4211 0); 4212 } 4213 4214 /* 4215 *--------------------------------------------------------------------------* 4216 * * 4217 * The PAP implementation. * 4218 * * 4219 *--------------------------------------------------------------------------* 4220 */ 4221 /* 4222 * For PAP, we need to keep a little state also if we are the peer, not the 4223 * authenticator. This is since we don't get a request to authenticate, but 4224 * have to repeatedly authenticate ourself until we got a response (or the 4225 * retry counter is expired). 4226 */ 4227 4228 /* 4229 * Handle incoming PAP packets. */ 4230 static void 4231 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4232 { 4233 STDDCL; 4234 struct lcp_header *h; 4235 int len, x; 4236 u_char mlen; 4237 char *name, *secret; 4238 int name_len, secret_len; 4239 4240 len = m->m_pkthdr.len; 4241 if (len < 5) { 4242 if (debug) 4243 log(LOG_DEBUG, 4244 "%s: pap invalid packet length: %d bytes\n", 4245 ifp->if_xname, len); 4246 return; 4247 } 4248 h = mtod(m, struct lcp_header *); 4249 if (len > ntohs(h->len)) 4250 len = ntohs(h->len); 4251 switch (h->type) { 4252 /* PAP request is my authproto */ 4253 case PAP_REQ: 4254 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4255 /* can't do anything usefull */ 4256 printf("%s: pap request without his name and his secret being set\n", 4257 ifp->if_xname); 4258 break; 4259 } 4260 name = 1 + (u_char *)(h + 1); 4261 name_len = name[-1]; 4262 secret = name + name_len + 1; 4263 if (name_len > len - 6 || 4264 (secret_len = secret[-1]) > len - 6 - name_len) { 4265 if (debug) { 4266 log(LOG_DEBUG, "%s: pap corrupted input " 4267 "<%s id=0x%x len=%d", 4268 ifp->if_xname, 4269 sppp_auth_type_name(PPP_PAP, h->type), 4270 h->ident, ntohs(h->len)); 4271 if (len > 4) 4272 sppp_print_bytes((u_char *)(h + 1), 4273 len - 4); 4274 addlog(">\n"); 4275 } 4276 break; 4277 } 4278 if (debug) { 4279 log(LOG_DEBUG, "%s: pap input(%s) " 4280 "<%s id=0x%x len=%d name=", 4281 ifp->if_xname, 4282 sppp_state_name(sp->state[IDX_PAP]), 4283 sppp_auth_type_name(PPP_PAP, h->type), 4284 h->ident, ntohs(h->len)); 4285 sppp_print_string((char *)name, name_len); 4286 addlog(" secret="); 4287 sppp_print_string((char *)secret, secret_len); 4288 addlog(">\n"); 4289 } 4290 if (name_len != sp->hisauth.name_len || 4291 secret_len != sp->hisauth.secret_len || 4292 memcmp(name, sp->hisauth.name, name_len) != 0 || 4293 memcmp(secret, sp->hisauth.secret, secret_len) != 0) { 4294 /* action scn, tld */ 4295 sp->pp_auth_failures++; 4296 mlen = sizeof(FAILMSG) - 1; 4297 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4298 sizeof mlen, (const char *)&mlen, 4299 sizeof(FAILMSG) - 1, (const u_char *)FAILMSG, 4300 0); 4301 pap.tld(sp); 4302 break; 4303 } 4304 /* action sca, perhaps tlu */ 4305 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4306 sp->state[IDX_PAP] == STATE_OPENED) { 4307 mlen = sizeof(SUCCMSG) - 1; 4308 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4309 sizeof mlen, (const char *)&mlen, 4310 sizeof(SUCCMSG) - 1, (const u_char *)SUCCMSG, 4311 0); 4312 } 4313 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4314 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4315 pap.tlu(sp); 4316 } 4317 break; 4318 4319 /* ack and nak are his authproto */ 4320 case PAP_ACK: 4321 callout_stop(&sp->pap_my_to_ch); 4322 if (debug) { 4323 log(LOG_DEBUG, "%s: pap success", 4324 ifp->if_xname); 4325 name_len = *(char *)h; 4326 if (len > 5 && name_len) { 4327 addlog(": "); 4328 sppp_print_string((char *)(h + 1), name_len); 4329 } 4330 addlog("\n"); 4331 } 4332 x = splnet(); 4333 sp->pp_auth_failures = 0; 4334 sp->pp_flags &= ~PP_NEEDAUTH; 4335 if (sp->myauth.proto == PPP_PAP && 4336 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4337 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4338 /* 4339 * We are authenticator for PAP but didn't 4340 * complete yet. Leave it to tlu to proceed 4341 * to network phase. 4342 */ 4343 splx(x); 4344 break; 4345 } 4346 splx(x); 4347 sppp_phase_network(sp); 4348 break; 4349 4350 case PAP_NAK: 4351 callout_stop(&sp->pap_my_to_ch); 4352 sp->pp_auth_failures++; 4353 if (debug) { 4354 log(LOG_INFO, "%s: pap failure", 4355 ifp->if_xname); 4356 name_len = *(char *)h; 4357 if (len > 5 && name_len) { 4358 addlog(": "); 4359 sppp_print_string((char *)(h + 1), name_len); 4360 } 4361 addlog("\n"); 4362 } else 4363 log(LOG_INFO, "%s: pap failure\n", 4364 ifp->if_xname); 4365 /* await LCP shutdown by authenticator */ 4366 break; 4367 4368 default: 4369 /* Unknown PAP packet type -- ignore. */ 4370 if (debug) { 4371 log(LOG_DEBUG, "%s: pap corrupted input " 4372 "<0x%x id=0x%x len=%d", 4373 ifp->if_xname, 4374 h->type, h->ident, ntohs(h->len)); 4375 if (len > 4) 4376 sppp_print_bytes((u_char *)(h + 1), len - 4); 4377 addlog(">\n"); 4378 } 4379 break; 4380 4381 } 4382 } 4383 4384 static void 4385 sppp_pap_init(struct sppp *sp) 4386 { 4387 /* PAP doesn't have STATE_INITIAL at all. */ 4388 sp->state[IDX_PAP] = STATE_CLOSED; 4389 sp->fail_counter[IDX_PAP] = 0; 4390 sp->pp_seq[IDX_PAP] = 0; 4391 sp->pp_rseq[IDX_PAP] = 0; 4392 callout_init(&sp->ch[IDX_PAP]); 4393 callout_init(&sp->pap_my_to_ch); 4394 } 4395 4396 static void 4397 sppp_pap_open(struct sppp *sp) 4398 { 4399 if (sp->hisauth.proto == PPP_PAP && 4400 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4401 /* we are authenticator for PAP, start our timer */ 4402 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4403 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4404 } 4405 if (sp->myauth.proto == PPP_PAP) { 4406 /* we are peer, send a request, and start a timer */ 4407 pap.scr(sp); 4408 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4409 sppp_pap_my_TO, sp); 4410 } 4411 } 4412 4413 static void 4414 sppp_pap_close(struct sppp *sp) 4415 { 4416 if (sp->state[IDX_PAP] != STATE_CLOSED) 4417 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4418 } 4419 4420 /* 4421 * That's the timeout routine if we are authenticator. Since the 4422 * authenticator is basically passive in PAP, we can't do much here. 4423 */ 4424 static void 4425 sppp_pap_TO(void *cookie) 4426 { 4427 struct sppp *sp = (struct sppp *)cookie; 4428 STDDCL; 4429 int s; 4430 4431 s = splnet(); 4432 if (debug) 4433 log(LOG_DEBUG, "%s: pap TO(%s) rst_counter = %d\n", 4434 ifp->if_xname, 4435 sppp_state_name(sp->state[IDX_PAP]), 4436 sp->rst_counter[IDX_PAP]); 4437 4438 if (--sp->rst_counter[IDX_PAP] < 0) 4439 /* TO- event */ 4440 switch (sp->state[IDX_PAP]) { 4441 case STATE_REQ_SENT: 4442 pap.tld(sp); 4443 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4444 break; 4445 } 4446 else 4447 /* TO+ event, not very much we could do */ 4448 switch (sp->state[IDX_PAP]) { 4449 case STATE_REQ_SENT: 4450 /* sppp_cp_change_state() will restart the timer */ 4451 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4452 break; 4453 } 4454 4455 splx(s); 4456 } 4457 4458 /* 4459 * That's the timeout handler if we are peer. Since the peer is active, 4460 * we need to retransmit our PAP request since it is apparently lost. 4461 * XXX We should impose a max counter. 4462 */ 4463 static void 4464 sppp_pap_my_TO(void *cookie) 4465 { 4466 struct sppp *sp = (struct sppp *)cookie; 4467 STDDCL; 4468 4469 if (debug) 4470 log(LOG_DEBUG, "%s: pap peer TO\n", 4471 ifp->if_xname); 4472 4473 pap.scr(sp); 4474 } 4475 4476 static void 4477 sppp_pap_tlu(struct sppp *sp) 4478 { 4479 STDDCL; 4480 int x; 4481 4482 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4483 4484 if (debug) 4485 log(LOG_DEBUG, "%s: %s tlu\n", 4486 ifp->if_xname, pap.name); 4487 4488 x = splnet(); 4489 sp->pp_auth_failures = 0; 4490 /* indicate to LCP that we need to be closed down */ 4491 sp->lcp.protos |= (1 << IDX_PAP); 4492 4493 if (sp->pp_flags & PP_NEEDAUTH) { 4494 /* 4495 * Remote is authenticator, but his auth proto didn't 4496 * complete yet. Defer the transition to network 4497 * phase. 4498 */ 4499 splx(x); 4500 return; 4501 } 4502 splx(x); 4503 sppp_phase_network(sp); 4504 } 4505 4506 static void 4507 sppp_pap_tld(struct sppp *sp) 4508 { 4509 STDDCL; 4510 4511 if (debug) 4512 log(LOG_DEBUG, "%s: pap tld\n", ifp->if_xname); 4513 callout_stop(&sp->ch[IDX_PAP]); 4514 callout_stop(&sp->pap_my_to_ch); 4515 sp->lcp.protos &= ~(1 << IDX_PAP); 4516 4517 lcp.Close(sp); 4518 } 4519 4520 static void 4521 sppp_pap_scr(struct sppp *sp) 4522 { 4523 u_char idlen, pwdlen; 4524 4525 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4526 /* can't do anything usefull */ 4527 printf("%s: pap starting without my name and secret being set\n", 4528 sp->pp_if.if_xname); 4529 return; 4530 } 4531 4532 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4533 pwdlen = sp->myauth.secret_len; 4534 idlen = sp->myauth.name_len; 4535 4536 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 4537 sizeof idlen, (const char *)&idlen, 4538 idlen, sp->myauth.name, 4539 sizeof pwdlen, (const char *)&pwdlen, 4540 pwdlen, sp->myauth.secret, 4541 0); 4542 } 4543 4544 /* 4545 * Random miscellaneous functions. 4546 */ 4547 4548 /* 4549 * Send a PAP or CHAP proto packet. 4550 * 4551 * Varadic function, each of the elements for the ellipsis is of type 4552 * ``size_t mlen, const u_char *msg''. Processing will stop iff 4553 * mlen == 0. 4554 * NOTE: never declare variadic functions with types subject to type 4555 * promotion (i.e. u_char). This is asking for big trouble depending 4556 * on the architecture you are on... 4557 */ 4558 4559 static void 4560 sppp_auth_send(const struct cp *cp, struct sppp *sp, 4561 unsigned int type, unsigned int id, 4562 ...) 4563 { 4564 STDDCL; 4565 struct lcp_header *lh; 4566 struct mbuf *m; 4567 u_char *p; 4568 int len; 4569 size_t pkthdrlen; 4570 unsigned int mlen; 4571 const char *msg; 4572 va_list ap; 4573 4574 MGETHDR(m, M_DONTWAIT, MT_DATA); 4575 if (! m) 4576 return; 4577 m->m_pkthdr.rcvif = 0; 4578 4579 if (sp->pp_flags & PP_NOFRAMING) { 4580 *mtod(m, u_int16_t *) = htons(cp->proto); 4581 pkthdrlen = 2; 4582 lh = (struct lcp_header *)(mtod(m, u_int8_t *)+2); 4583 } else { 4584 struct ppp_header *h; 4585 h = mtod(m, struct ppp_header *); 4586 h->address = PPP_ALLSTATIONS; /* broadcast address */ 4587 h->control = PPP_UI; /* Unnumbered Info */ 4588 h->protocol = htons(cp->proto); 4589 pkthdrlen = PPP_HEADER_LEN; 4590 4591 lh = (struct lcp_header *)(h + 1); 4592 } 4593 4594 lh->type = type; 4595 lh->ident = id; 4596 p = (u_char *)(lh + 1); 4597 4598 va_start(ap, id); 4599 len = 0; 4600 4601 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 4602 msg = va_arg(ap, const char *); 4603 len += mlen; 4604 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 4605 va_end(ap); 4606 m_freem(m); 4607 return; 4608 } 4609 4610 bcopy(msg, p, mlen); 4611 p += mlen; 4612 } 4613 va_end(ap); 4614 4615 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 4616 lh->len = htons(LCP_HEADER_LEN + len); 4617 4618 if (debug) { 4619 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 4620 ifp->if_xname, cp->name, 4621 sppp_auth_type_name(cp->proto, lh->type), 4622 lh->ident, ntohs(lh->len)); 4623 if (len) 4624 sppp_print_bytes((u_char *)(lh + 1), len); 4625 addlog(">\n"); 4626 } 4627 if (IF_QFULL(&sp->pp_cpq)) { 4628 IF_DROP(&sp->pp_fastq); 4629 IF_DROP(&ifp->if_snd); 4630 m_freem(m); 4631 ++ifp->if_oerrors; 4632 return; 4633 } else 4634 IF_ENQUEUE(&sp->pp_cpq, m); 4635 if (! (ifp->if_flags & IFF_OACTIVE)) 4636 (*ifp->if_start)(ifp); 4637 ifp->if_obytes += m->m_pkthdr.len + 3; 4638 } 4639 4640 /* 4641 * Send keepalive packets, every 10 seconds. 4642 */ 4643 static void 4644 sppp_keepalive(void *dummy) 4645 { 4646 struct sppp *sp; 4647 int s; 4648 time_t now; 4649 4650 s = splnet(); 4651 now = mono_time.tv_sec; 4652 for (sp=spppq; sp; sp=sp->pp_next) { 4653 struct ifnet *ifp = &sp->pp_if; 4654 4655 /* check idle timeout */ 4656 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 4657 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 4658 /* idle timeout is enabled for this interface */ 4659 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 4660 if (ifp->if_flags & IFF_DEBUG) 4661 printf("%s: no activity for %lu seconds\n", 4662 sp->pp_if.if_xname, 4663 (unsigned long)(now-sp->pp_last_activity)); 4664 lcp.Close(sp); 4665 continue; 4666 } 4667 } 4668 4669 /* Keepalive mode disabled or channel down? */ 4670 if (! (sp->pp_flags & PP_KEEPALIVE) || 4671 ! (ifp->if_flags & IFF_RUNNING)) 4672 continue; 4673 4674 /* No keepalive in PPP mode if LCP not opened yet. */ 4675 if (! (sp->pp_flags & PP_CISCO) && 4676 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) 4677 continue; 4678 4679 /* No echo reply, but maybe user data passed through? */ 4680 if ((now - sp->pp_last_receive) < sp->pp_max_noreceive) { 4681 sp->pp_alivecnt = 0; 4682 continue; 4683 } 4684 4685 if (sp->pp_alivecnt >= sp->pp_maxalive) { 4686 /* No keepalive packets got. Stop the interface. */ 4687 if_down (ifp); 4688 IF_PURGE(&sp->pp_cpq); 4689 if (! (sp->pp_flags & PP_CISCO)) { 4690 printf("%s: LCP keepalive timed out, going to restart the connection\n", 4691 ifp->if_xname); 4692 sp->pp_alivecnt = 0; 4693 4694 /* we are down, close all open protocols */ 4695 lcp.Close(sp); 4696 4697 /* And now prepare LCP to reestablish the link, if configured to do so. */ 4698 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 4699 4700 /* Close connection imediatly, completition of this 4701 * will summon the magic needed to reestablish it. */ 4702 sp->pp_tlf(sp); 4703 continue; 4704 } 4705 } 4706 if (sp->pp_alivecnt < sp->pp_maxalive) 4707 ++sp->pp_alivecnt; 4708 if (sp->pp_flags & PP_CISCO) 4709 sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ, 4710 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 4711 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 4712 int32_t nmagic = htonl(sp->lcp.magic); 4713 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 4714 sppp_cp_send(sp, PPP_LCP, ECHO_REQ, 4715 sp->lcp.echoid, 4, &nmagic); 4716 } 4717 } 4718 splx(s); 4719 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 4720 } 4721 4722 #ifdef INET 4723 /* 4724 * Get both IP addresses. 4725 */ 4726 static void 4727 sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, u_int32_t *srcmask) 4728 { 4729 struct ifnet *ifp = &sp->pp_if; 4730 struct ifaddr *ifa; 4731 struct sockaddr_in *si, *sm; 4732 u_int32_t ssrc, ddst; 4733 4734 sm = NULL; 4735 ssrc = ddst = 0; 4736 /* 4737 * Pick the first AF_INET address from the list, 4738 * aliases don't make any sense on a p2p link anyway. 4739 */ 4740 si = 0; 4741 IFADDR_FOREACH(ifa, ifp) { 4742 if (ifa->ifa_addr->sa_family == AF_INET) { 4743 si = (struct sockaddr_in *)ifa->ifa_addr; 4744 sm = (struct sockaddr_in *)ifa->ifa_netmask; 4745 if (si) 4746 break; 4747 } 4748 } 4749 if (ifa) { 4750 if (si && si->sin_addr.s_addr) { 4751 ssrc = si->sin_addr.s_addr; 4752 if (srcmask) 4753 *srcmask = ntohl(sm->sin_addr.s_addr); 4754 } 4755 4756 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 4757 if (si && si->sin_addr.s_addr) 4758 ddst = si->sin_addr.s_addr; 4759 } 4760 4761 if (dst) *dst = ntohl(ddst); 4762 if (src) *src = ntohl(ssrc); 4763 } 4764 4765 /* 4766 * Set IP addresses. Must be called at splnet. 4767 * If an address is 0, leave it the way it is. 4768 */ 4769 static void 4770 sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr) 4771 { 4772 STDDCL; 4773 struct ifaddr *ifa; 4774 struct sockaddr_in *si, *dest; 4775 4776 /* 4777 * Pick the first AF_INET address from the list, 4778 * aliases don't make any sense on a p2p link anyway. 4779 */ 4780 4781 IFADDR_FOREACH(ifa, ifp) { 4782 if (ifa->ifa_addr->sa_family == AF_INET) { 4783 si = (struct sockaddr_in *)ifa->ifa_addr; 4784 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4785 goto found; 4786 } 4787 } 4788 return; 4789 4790 found: 4791 { 4792 int error; 4793 struct sockaddr_in new_sin = *si; 4794 struct sockaddr_in new_dst = *dest; 4795 4796 /* 4797 * Scrub old routes now instead of calling in_ifinit with 4798 * scrub=1, because we may change the dstaddr 4799 * before the call to in_ifinit. 4800 */ 4801 in_ifscrub(ifp, ifatoia(ifa)); 4802 4803 if (myaddr != 0) 4804 new_sin.sin_addr.s_addr = htonl(myaddr); 4805 if (hisaddr != 0) { 4806 new_dst.sin_addr.s_addr = htonl(hisaddr); 4807 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) { 4808 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 4809 *dest = new_dst; /* fix dstaddr in place */ 4810 } 4811 } 4812 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4813 if (debug && error) 4814 { 4815 log(LOG_DEBUG, "%s: sppp_set_ip_addrs: in_ifinit " 4816 " failed, error=%d\n", ifp->if_xname, error); 4817 } 4818 #ifdef PFIL_HOOKS 4819 if (!error) 4820 (void)pfil_run_hooks(&if_pfil, 4821 (struct mbuf **)SIOCAIFADDR, ifp, PFIL_IFADDR); 4822 #endif 4823 } 4824 } 4825 4826 /* 4827 * Clear IP addresses. Must be called at splnet. 4828 */ 4829 static void 4830 sppp_clear_ip_addrs(struct sppp *sp) 4831 { 4832 struct ifnet *ifp = &sp->pp_if; 4833 struct ifaddr *ifa; 4834 struct sockaddr_in *si, *dest; 4835 4836 u_int32_t remote; 4837 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4838 remote = sp->ipcp.saved_hisaddr; 4839 else 4840 sppp_get_ip_addrs(sp, 0, &remote, 0); 4841 4842 /* 4843 * Pick the first AF_INET address from the list, 4844 * aliases don't make any sense on a p2p link anyway. 4845 */ 4846 4847 IFADDR_FOREACH(ifa, ifp) { 4848 if (ifa->ifa_addr->sa_family == AF_INET) { 4849 si = (struct sockaddr_in *)ifa->ifa_addr; 4850 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4851 goto found; 4852 } 4853 } 4854 return; 4855 4856 found: 4857 { 4858 struct sockaddr_in new_sin = *si; 4859 4860 in_ifscrub(ifp, ifatoia(ifa)); 4861 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 4862 new_sin.sin_addr.s_addr = 0; 4863 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4864 /* replace peer addr in place */ 4865 dest->sin_addr.s_addr = sp->ipcp.saved_hisaddr; 4866 in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4867 #ifdef PFIL_HOOKS 4868 (void)pfil_run_hooks(&if_pfil, 4869 (struct mbuf **)SIOCDIFADDR, ifp, PFIL_IFADDR); 4870 #endif 4871 } 4872 } 4873 #endif 4874 4875 #ifdef INET6 4876 /* 4877 * Get both IPv6 addresses. 4878 */ 4879 static void 4880 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 4881 struct in6_addr *srcmask) 4882 { 4883 struct ifnet *ifp = &sp->pp_if; 4884 struct ifaddr *ifa; 4885 struct sockaddr_in6 *si, *sm; 4886 struct in6_addr ssrc, ddst; 4887 4888 sm = NULL; 4889 memset(&ssrc, 0, sizeof(ssrc)); 4890 memset(&ddst, 0, sizeof(ddst)); 4891 /* 4892 * Pick the first link-local AF_INET6 address from the list, 4893 * aliases don't make any sense on a p2p link anyway. 4894 */ 4895 si = 0; 4896 IFADDR_FOREACH(ifa, ifp) 4897 if (ifa->ifa_addr->sa_family == AF_INET6) { 4898 si = (struct sockaddr_in6 *)ifa->ifa_addr; 4899 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 4900 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) 4901 break; 4902 } 4903 if (ifa) { 4904 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 4905 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc)); 4906 if (srcmask) { 4907 bcopy(&sm->sin6_addr, srcmask, 4908 sizeof(*srcmask)); 4909 } 4910 } 4911 4912 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 4913 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 4914 bcopy(&si->sin6_addr, &ddst, sizeof(ddst)); 4915 } 4916 4917 if (dst) 4918 bcopy(&ddst, dst, sizeof(*dst)); 4919 if (src) 4920 bcopy(&ssrc, src, sizeof(*src)); 4921 } 4922 4923 #ifdef IPV6CP_MYIFID_DYN 4924 /* 4925 * Generate random ifid. 4926 */ 4927 static void 4928 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 4929 { 4930 /* TBD */ 4931 } 4932 4933 /* 4934 * Set my IPv6 address. Must be called at splnet. 4935 */ 4936 static void 4937 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 4938 { 4939 STDDCL; 4940 struct ifaddr *ifa; 4941 struct sockaddr_in6 *sin6; 4942 4943 /* 4944 * Pick the first link-local AF_INET6 address from the list, 4945 * aliases don't make any sense on a p2p link anyway. 4946 */ 4947 4948 sin6 = NULL; 4949 IFADDR_FOREACH(ifa, ifp) 4950 { 4951 if (ifa->ifa_addr->sa_family == AF_INET6) 4952 { 4953 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 4954 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 4955 break; 4956 } 4957 } 4958 4959 if (ifa && sin6) 4960 { 4961 int error; 4962 struct sockaddr_in6 new_sin6 = *sin6; 4963 4964 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr)); 4965 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 4966 if (debug && error) 4967 { 4968 log(LOG_DEBUG, "%s: sppp_set_ip6_addr: in6_ifinit " 4969 " failed, error=%d\n", ifp->if_xname, error); 4970 } 4971 #ifdef PFIL_HOOKS 4972 if (!error) 4973 (void)pfil_run_hooks(&if_pfil, 4974 (struct mbuf **)SIOCAIFADDR_IN6, ifp, PFIL_IFADDR); 4975 #endif 4976 } 4977 } 4978 #endif 4979 4980 /* 4981 * Suggest a candidate address to be used by peer. 4982 */ 4983 static void 4984 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 4985 { 4986 struct in6_addr myaddr; 4987 struct timeval tv; 4988 4989 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4990 4991 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 4992 microtime(&tv); 4993 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 4994 myaddr.s6_addr[14] ^= 0xff; 4995 myaddr.s6_addr[15] ^= 0xff; 4996 } else { 4997 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 4998 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 4999 } 5000 if (suggest) 5001 bcopy(&myaddr, suggest, sizeof(myaddr)); 5002 } 5003 #endif /*INET6*/ 5004 5005 /* 5006 * Process ioctl requests specific to the PPP interface. 5007 * Permissions have already been checked. 5008 */ 5009 static int 5010 sppp_params(struct sppp *sp, int cmd, void *data) 5011 { 5012 switch (cmd) { 5013 case SPPPGETAUTHCFG: 5014 { 5015 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5016 int error; 5017 size_t len; 5018 5019 cfg->myauthflags = sp->myauth.flags; 5020 cfg->hisauthflags = sp->hisauth.flags; 5021 strncpy(cfg->ifname, sp->pp_if.if_xname, IFNAMSIZ); 5022 cfg->hisauth = 0; 5023 if (sp->hisauth.proto) 5024 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5025 cfg->myauth = 0; 5026 if (sp->myauth.proto) 5027 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5028 if (cfg->myname_length == 0) { 5029 if (sp->myauth.name != NULL) 5030 cfg->myname_length = sp->myauth.name_len + 1; 5031 } else { 5032 if (sp->myauth.name == NULL) { 5033 cfg->myname_length = 0; 5034 } else { 5035 len = sp->myauth.name_len + 1; 5036 if (cfg->myname_length < len) 5037 return (ENAMETOOLONG); 5038 error = copyout(sp->myauth.name, cfg->myname, len); 5039 if (error) return error; 5040 } 5041 } 5042 if (cfg->hisname_length == 0) { 5043 if (sp->hisauth.name != NULL) 5044 cfg->hisname_length = sp->hisauth.name_len + 1; 5045 } else { 5046 if (sp->hisauth.name == NULL) { 5047 cfg->hisname_length = 0; 5048 } else { 5049 len = sp->hisauth.name_len + 1; 5050 if (cfg->hisname_length < len) 5051 return (ENAMETOOLONG); 5052 error = copyout(sp->hisauth.name, cfg->hisname, len); 5053 if (error) return error; 5054 } 5055 } 5056 } 5057 break; 5058 case SPPPSETAUTHCFG: 5059 { 5060 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5061 int error; 5062 5063 if (sp->myauth.name) { 5064 free(sp->myauth.name, M_DEVBUF); 5065 sp->myauth.name = NULL; 5066 } 5067 if (sp->myauth.secret) { 5068 free(sp->myauth.secret, M_DEVBUF); 5069 sp->myauth.secret = NULL; 5070 } 5071 if (sp->hisauth.name) { 5072 free(sp->hisauth.name, M_DEVBUF); 5073 sp->hisauth.name = NULL; 5074 } 5075 if (sp->hisauth.secret) { 5076 free(sp->hisauth.secret, M_DEVBUF); 5077 sp->hisauth.secret = NULL; 5078 } 5079 5080 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5081 if (cfg->hisname_length >= MCLBYTES) 5082 return (ENAMETOOLONG); 5083 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5084 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5085 if (error) { 5086 free(sp->hisauth.name, M_DEVBUF); 5087 sp->hisauth.name = NULL; 5088 return error; 5089 } 5090 sp->hisauth.name_len = cfg->hisname_length - 1; 5091 sp->hisauth.name[sp->hisauth.name_len] = 0; 5092 } 5093 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5094 if (cfg->hissecret_length >= MCLBYTES) 5095 return (ENAMETOOLONG); 5096 sp->hisauth.secret = malloc(cfg->hissecret_length, M_DEVBUF, M_WAITOK); 5097 error = copyin(cfg->hissecret, sp->hisauth.secret, cfg->hissecret_length); 5098 if (error) { 5099 free(sp->hisauth.secret, M_DEVBUF); 5100 sp->hisauth.secret = NULL; 5101 return error; 5102 } 5103 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5104 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5105 } 5106 if (cfg->myname != NULL && cfg->myname_length > 0) { 5107 if (cfg->myname_length >= MCLBYTES) 5108 return (ENAMETOOLONG); 5109 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5110 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5111 if (error) { 5112 free(sp->myauth.name, M_DEVBUF); 5113 sp->myauth.name = NULL; 5114 return error; 5115 } 5116 sp->myauth.name_len = cfg->myname_length - 1; 5117 sp->myauth.name[sp->myauth.name_len] = 0; 5118 } 5119 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5120 if (cfg->mysecret_length >= MCLBYTES) 5121 return (ENAMETOOLONG); 5122 sp->myauth.secret = malloc(cfg->mysecret_length, M_DEVBUF, M_WAITOK); 5123 error = copyin(cfg->mysecret, sp->myauth.secret, cfg->mysecret_length); 5124 if (error) { 5125 free(sp->myauth.secret, M_DEVBUF); 5126 sp->myauth.secret = NULL; 5127 return error; 5128 } 5129 sp->myauth.secret_len = cfg->mysecret_length - 1; 5130 sp->myauth.secret[sp->myauth.secret_len] = 0; 5131 } 5132 sp->myauth.flags = cfg->myauthflags; 5133 if (cfg->myauth) 5134 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5135 sp->hisauth.flags = cfg->hisauthflags; 5136 if (cfg->hisauth) 5137 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5138 sp->pp_auth_failures = 0; 5139 if (sp->hisauth.proto != 0) 5140 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 5141 else 5142 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 5143 } 5144 break; 5145 case SPPPGETLCPCFG: 5146 { 5147 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5148 lcpp->lcp_timeout = sp->lcp.timeout; 5149 } 5150 break; 5151 case SPPPSETLCPCFG: 5152 { 5153 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data; 5154 sp->lcp.timeout = lcpp->lcp_timeout; 5155 } 5156 break; 5157 case SPPPGETSTATUS: 5158 { 5159 struct spppstatus *status = (struct spppstatus *)data; 5160 status->phase = sp->pp_phase; 5161 } 5162 break; 5163 case SPPPGETSTATUSNCP: 5164 { 5165 struct spppstatusncp *status = (struct spppstatusncp *)data; 5166 status->phase = sp->pp_phase; 5167 status->ncpup = sppp_ncp_check(sp); 5168 } 5169 break; 5170 case SPPPGETIDLETO: 5171 { 5172 struct spppidletimeout *to = (struct spppidletimeout *)data; 5173 to->idle_seconds = sp->pp_idle_timeout; 5174 } 5175 break; 5176 case SPPPSETIDLETO: 5177 { 5178 struct spppidletimeout *to = (struct spppidletimeout *)data; 5179 sp->pp_idle_timeout = to->idle_seconds; 5180 } 5181 break; 5182 case SPPPSETAUTHFAILURE: 5183 { 5184 struct spppauthfailuresettings *afsettings = (struct spppauthfailuresettings *)data; 5185 sp->pp_max_auth_fail = afsettings->max_failures; 5186 sp->pp_auth_failures = 0; 5187 } 5188 break; 5189 case SPPPGETAUTHFAILURES: 5190 { 5191 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5192 stats->auth_failures = sp->pp_auth_failures; 5193 stats->max_failures = sp->pp_max_auth_fail; 5194 } 5195 break; 5196 case SPPPSETDNSOPTS: 5197 { 5198 struct spppdnssettings *req = (struct spppdnssettings *)data; 5199 sp->query_dns = req->query_dns & 3; 5200 } 5201 break; 5202 case SPPPGETDNSOPTS: 5203 { 5204 struct spppdnssettings *req = (struct spppdnssettings *)data; 5205 req->query_dns = sp->query_dns; 5206 } 5207 break; 5208 case SPPPGETDNSADDRS: 5209 { 5210 struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data; 5211 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5212 } 5213 break; 5214 case SPPPGETKEEPALIVE: 5215 { 5216 struct spppkeepalivesettings *settings = 5217 (struct spppkeepalivesettings*)data; 5218 settings->maxalive = sp->pp_maxalive; 5219 settings->max_noreceive = sp->pp_max_noreceive; 5220 } 5221 break; 5222 case SPPPSETKEEPALIVE: 5223 { 5224 struct spppkeepalivesettings *settings = 5225 (struct spppkeepalivesettings*)data; 5226 sp->pp_maxalive = settings->maxalive; 5227 sp->pp_max_noreceive = settings->max_noreceive; 5228 } 5229 break; 5230 default: 5231 return (EINVAL); 5232 } 5233 5234 return (0); 5235 } 5236 5237 static void 5238 sppp_phase_network(struct sppp *sp) 5239 { 5240 STDDCL; 5241 int i; 5242 u_int32_t mask; 5243 5244 sp->pp_phase = SPPP_PHASE_NETWORK; 5245 5246 if (debug) 5247 { 5248 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 5249 sppp_phase_name(sp->pp_phase)); 5250 } 5251 5252 /* Notify NCPs now. */ 5253 for (i = 0; i < IDX_COUNT; i++) 5254 if ((cps[i])->flags & CP_NCP) 5255 (cps[i])->Open(sp); 5256 5257 /* Send Up events to all NCPs. */ 5258 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5259 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) 5260 (cps[i])->Up(sp); 5261 5262 /* if no NCP is starting, all this was in vain, close down */ 5263 sppp_lcp_check_and_close(sp); 5264 } 5265 5266 5267 static const char * 5268 sppp_cp_type_name(u_char type) 5269 { 5270 static char buf[12]; 5271 switch (type) { 5272 case CONF_REQ: return "conf-req"; 5273 case CONF_ACK: return "conf-ack"; 5274 case CONF_NAK: return "conf-nak"; 5275 case CONF_REJ: return "conf-rej"; 5276 case TERM_REQ: return "term-req"; 5277 case TERM_ACK: return "term-ack"; 5278 case CODE_REJ: return "code-rej"; 5279 case PROTO_REJ: return "proto-rej"; 5280 case ECHO_REQ: return "echo-req"; 5281 case ECHO_REPLY: return "echo-reply"; 5282 case DISC_REQ: return "discard-req"; 5283 } 5284 snprintf(buf, sizeof(buf), "0x%x", type); 5285 return buf; 5286 } 5287 5288 static const char * 5289 sppp_auth_type_name(u_short proto, u_char type) 5290 { 5291 static char buf[12]; 5292 switch (proto) { 5293 case PPP_CHAP: 5294 switch (type) { 5295 case CHAP_CHALLENGE: return "challenge"; 5296 case CHAP_RESPONSE: return "response"; 5297 case CHAP_SUCCESS: return "success"; 5298 case CHAP_FAILURE: return "failure"; 5299 } 5300 case PPP_PAP: 5301 switch (type) { 5302 case PAP_REQ: return "req"; 5303 case PAP_ACK: return "ack"; 5304 case PAP_NAK: return "nak"; 5305 } 5306 } 5307 snprintf(buf, sizeof(buf), "0x%x", type); 5308 return buf; 5309 } 5310 5311 static const char * 5312 sppp_lcp_opt_name(u_char opt) 5313 { 5314 static char buf[12]; 5315 switch (opt) { 5316 case LCP_OPT_MRU: return "mru"; 5317 case LCP_OPT_ASYNC_MAP: return "async-map"; 5318 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 5319 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 5320 case LCP_OPT_MAGIC: return "magic"; 5321 case LCP_OPT_PROTO_COMP: return "proto-comp"; 5322 case LCP_OPT_ADDR_COMP: return "addr-comp"; 5323 } 5324 snprintf(buf, sizeof(buf), "0x%x", opt); 5325 return buf; 5326 } 5327 5328 static const char * 5329 sppp_ipcp_opt_name(u_char opt) 5330 { 5331 static char buf[12]; 5332 switch (opt) { 5333 case IPCP_OPT_ADDRESSES: return "addresses"; 5334 case IPCP_OPT_COMPRESSION: return "compression"; 5335 case IPCP_OPT_ADDRESS: return "address"; 5336 } 5337 snprintf(buf, sizeof(buf), "0x%x", opt); 5338 return buf; 5339 } 5340 5341 #ifdef INET6 5342 static const char * 5343 sppp_ipv6cp_opt_name(u_char opt) 5344 { 5345 static char buf[12]; 5346 switch (opt) { 5347 case IPV6CP_OPT_IFID: return "ifid"; 5348 case IPV6CP_OPT_COMPRESSION: return "compression"; 5349 } 5350 snprintf(buf, sizeof(buf), "0x%x", opt); 5351 return buf; 5352 } 5353 #endif 5354 5355 static const char * 5356 sppp_state_name(int state) 5357 { 5358 switch (state) { 5359 case STATE_INITIAL: return "initial"; 5360 case STATE_STARTING: return "starting"; 5361 case STATE_CLOSED: return "closed"; 5362 case STATE_STOPPED: return "stopped"; 5363 case STATE_CLOSING: return "closing"; 5364 case STATE_STOPPING: return "stopping"; 5365 case STATE_REQ_SENT: return "req-sent"; 5366 case STATE_ACK_RCVD: return "ack-rcvd"; 5367 case STATE_ACK_SENT: return "ack-sent"; 5368 case STATE_OPENED: return "opened"; 5369 } 5370 return "illegal"; 5371 } 5372 5373 static const char * 5374 sppp_phase_name(int phase) 5375 { 5376 switch (phase) { 5377 case SPPP_PHASE_DEAD: return "dead"; 5378 case SPPP_PHASE_ESTABLISH: return "establish"; 5379 case SPPP_PHASE_TERMINATE: return "terminate"; 5380 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 5381 case SPPP_PHASE_NETWORK: return "network"; 5382 } 5383 return "illegal"; 5384 } 5385 5386 static const char * 5387 sppp_proto_name(u_short proto) 5388 { 5389 static char buf[12]; 5390 switch (proto) { 5391 case PPP_LCP: return "lcp"; 5392 case PPP_IPCP: return "ipcp"; 5393 case PPP_PAP: return "pap"; 5394 case PPP_CHAP: return "chap"; 5395 case PPP_IPV6CP: return "ipv6cp"; 5396 } 5397 snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto); 5398 return buf; 5399 } 5400 5401 static void 5402 sppp_print_bytes(const u_char *p, u_short len) 5403 { 5404 addlog(" %02x", *p++); 5405 while (--len > 0) 5406 addlog("-%02x", *p++); 5407 } 5408 5409 static void 5410 sppp_print_string(const char *p, u_short len) 5411 { 5412 u_char c; 5413 5414 while (len-- > 0) { 5415 c = *p++; 5416 /* 5417 * Print only ASCII chars directly. RFC 1994 recommends 5418 * using only them, but we don't rely on it. */ 5419 if (c < ' ' || c > '~') 5420 addlog("\\x%x", c); 5421 else 5422 addlog("%c", c); 5423 } 5424 } 5425 5426 static const char * 5427 sppp_dotted_quad(u_int32_t addr) 5428 { 5429 static char s[16]; 5430 snprintf(s, sizeof(s), "%d.%d.%d.%d", 5431 (int)((addr >> 24) & 0xff), 5432 (int)((addr >> 16) & 0xff), 5433 (int)((addr >> 8) & 0xff), 5434 (int)(addr & 0xff)); 5435 return s; 5436 } 5437 5438 /* a dummy, used to drop uninteresting events */ 5439 static void 5440 sppp_null(struct sppp *unused) 5441 { 5442 /* do just nothing */ 5443 } 5444 /* 5445 * This file is large. Tell emacs to highlight it nevertheless. 5446 * 5447 * Local Variables: 5448 * hilit-auto-highlight-maxout: 120000 5449 * End: 5450 */ 5451
Indexes created Fri Sep 26 08:10:20 GMT 2025