if_spppsubr.c revision 1.94
1 /* $NetBSD: if_spppsubr.c,v 1.94 2006/07/13 23:43:13 martin 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 1.94 2006/07/13 23:43:13 martin 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 #include <sys/kauth.h> 65 66 #include <net/if.h> 67 #include <net/netisr.h> 68 #include <net/if_types.h> 69 #include <net/route.h> 70 #include <net/ppp_defs.h> 71 72 #include <machine/stdarg.h> 73 74 #include <netinet/in.h> 75 #include <netinet/in_systm.h> 76 #include <netinet/in_var.h> 77 #ifdef INET 78 #include <netinet/ip.h> 79 #include <netinet/tcp.h> 80 #endif 81 #include <net/ethertypes.h> 82 83 #ifdef INET6 84 #include <netinet6/scope6_var.h> 85 #endif 86 87 #ifdef IPX 88 #include <netipx/ipx.h> 89 #include <netipx/ipx_if.h> 90 #endif 91 92 #ifdef NS 93 #include <netns/ns.h> 94 #include <netns/ns_if.h> 95 #endif 96 97 #ifdef ISO 98 #include <netiso/argo_debug.h> 99 #include <netiso/iso.h> 100 #include <netiso/iso_var.h> 101 #include <netiso/iso_snpac.h> 102 #endif 103 104 #include <net/if_sppp.h> 105 #include <net/if_spppvar.h> 106 107 #define LCP_KEEPALIVE_INTERVAL 10 /* seconds between checks */ 108 #define LOOPALIVECNT 3 /* loopback detection tries */ 109 #define DEFAULT_MAXALIVECNT 3 /* max. missed alive packets */ 110 #define DEFAULT_NORECV_TIME 15 /* before we get worried */ 111 #define DEFAULT_MAX_AUTH_FAILURES 5 /* max. auth. failures */ 112 113 /* 114 * Interface flags that can be set in an ifconfig command. 115 * 116 * Setting link0 will make the link passive, i.e. it will be marked 117 * as being administrative openable, but won't be opened to begin 118 * with. Incoming calls will be answered, or subsequent calls with 119 * -link1 will cause the administrative open of the LCP layer. 120 * 121 * Setting link1 will cause the link to auto-dial only as packets 122 * arrive to be sent. 123 * 124 * Setting IFF_DEBUG will syslog the option negotiation and state 125 * transitions at level kern.debug. Note: all logs consistently look 126 * like 127 * 128 * <if-name><unit>: <proto-name> <additional info...> 129 * 130 * with <if-name><unit> being something like "bppp0", and <proto-name> 131 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc. 132 */ 133 134 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ 135 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */ 136 137 #define CONF_REQ 1 /* PPP configure request */ 138 #define CONF_ACK 2 /* PPP configure acknowledge */ 139 #define CONF_NAK 3 /* PPP configure negative ack */ 140 #define CONF_REJ 4 /* PPP configure reject */ 141 #define TERM_REQ 5 /* PPP terminate request */ 142 #define TERM_ACK 6 /* PPP terminate acknowledge */ 143 #define CODE_REJ 7 /* PPP code reject */ 144 #define PROTO_REJ 8 /* PPP protocol reject */ 145 #define ECHO_REQ 9 /* PPP echo request */ 146 #define ECHO_REPLY 10 /* PPP echo reply */ 147 #define DISC_REQ 11 /* PPP discard request */ 148 149 #define LCP_OPT_MRU 1 /* maximum receive unit */ 150 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */ 151 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ 152 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ 153 #define LCP_OPT_MAGIC 5 /* magic number */ 154 #define LCP_OPT_RESERVED 6 /* reserved */ 155 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ 156 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ 157 158 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ 159 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol */ 160 #define IPCP_OPT_ADDRESS 3 /* local IP address */ 161 #define IPCP_OPT_PRIMDNS 129 /* primary remote dns address */ 162 #define IPCP_OPT_SECDNS 131 /* secondary remote dns address */ 163 164 #define IPV6CP_OPT_IFID 1 /* interface identifier */ 165 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ 166 167 #define PAP_REQ 1 /* PAP name/password request */ 168 #define PAP_ACK 2 /* PAP acknowledge */ 169 #define PAP_NAK 3 /* PAP fail */ 170 171 #define CHAP_CHALLENGE 1 /* CHAP challenge request */ 172 #define CHAP_RESPONSE 2 /* CHAP challenge response */ 173 #define CHAP_SUCCESS 3 /* CHAP response ok */ 174 #define CHAP_FAILURE 4 /* CHAP response failed */ 175 176 #define CHAP_MD5 5 /* hash algorithm - MD5 */ 177 178 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */ 179 #define CISCO_UNICAST 0x0f /* Cisco unicast address */ 180 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ 181 #define CISCO_ADDR_REQ 0 /* Cisco address request */ 182 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */ 183 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ 184 185 /* states are named and numbered according to RFC 1661 */ 186 #define STATE_INITIAL 0 187 #define STATE_STARTING 1 188 #define STATE_CLOSED 2 189 #define STATE_STOPPED 3 190 #define STATE_CLOSING 4 191 #define STATE_STOPPING 5 192 #define STATE_REQ_SENT 6 193 #define STATE_ACK_RCVD 7 194 #define STATE_ACK_SENT 8 195 #define STATE_OPENED 9 196 197 struct ppp_header { 198 u_int8_t address; 199 u_int8_t control; 200 u_int16_t protocol; 201 } __attribute__((__packed__)); 202 #define PPP_HEADER_LEN sizeof (struct ppp_header) 203 204 struct lcp_header { 205 u_int8_t type; 206 u_int8_t ident; 207 u_int16_t len; 208 } __attribute__((__packed__)); 209 #define LCP_HEADER_LEN sizeof (struct lcp_header) 210 211 struct cisco_packet { 212 u_int32_t type; 213 u_int32_t par1; 214 u_int32_t par2; 215 u_int16_t rel; 216 u_int16_t time0; 217 u_int16_t time1; 218 } __attribute__((__packed__)); 219 #define CISCO_PACKET_LEN 18 220 221 /* 222 * We follow the spelling and capitalization of RFC 1661 here, to make 223 * it easier comparing with the standard. Please refer to this RFC in 224 * case you can't make sense out of these abbreviation; it will also 225 * explain the semantics related to the various events and actions. 226 */ 227 struct cp { 228 u_short proto; /* PPP control protocol number */ 229 u_char protoidx; /* index into state table in struct sppp */ 230 u_char flags; 231 #define CP_LCP 0x01 /* this is the LCP */ 232 #define CP_AUTH 0x02 /* this is an authentication protocol */ 233 #define CP_NCP 0x04 /* this is a NCP */ 234 #define CP_QUAL 0x08 /* this is a quality reporting protocol */ 235 const char *name; /* name of this control protocol */ 236 /* event handlers */ 237 void (*Up)(struct sppp *sp); 238 void (*Down)(struct sppp *sp); 239 void (*Open)(struct sppp *sp); 240 void (*Close)(struct sppp *sp); 241 void (*TO)(void *sp); 242 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len); 243 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len); 244 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len); 245 /* actions */ 246 void (*tlu)(struct sppp *sp); 247 void (*tld)(struct sppp *sp); 248 void (*tls)(struct sppp *sp); 249 void (*tlf)(struct sppp *sp); 250 void (*scr)(struct sppp *sp); 251 }; 252 253 static struct sppp *spppq; 254 static struct callout keepalive_ch; 255 256 #ifdef INET 257 /* 258 * The following disgusting hack gets around the problem that IP TOS 259 * can't be set yet. We want to put "interactive" traffic on a high 260 * priority queue. To decide if traffic is interactive, we check that 261 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 262 * 263 * XXX is this really still necessary? - joerg - 264 */ 265 static u_short interactive_ports[8] = { 266 0, 513, 0, 0, 267 0, 21, 0, 23, 268 }; 269 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 270 #endif 271 272 /* almost every function needs these */ 273 #define STDDCL \ 274 struct ifnet *ifp = &sp->pp_if; \ 275 int debug = ifp->if_flags & IFF_DEBUG 276 277 static int sppp_output(struct ifnet *ifp, struct mbuf *m, 278 struct sockaddr *dst, struct rtentry *rt); 279 280 static void sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2); 281 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m); 282 283 static void sppp_cp_input(const struct cp *cp, struct sppp *sp, 284 struct mbuf *m); 285 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 286 u_char ident, u_short len, void *data); 287 /* static void sppp_cp_timeout(void *arg); */ 288 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp, 289 int newstate); 290 static void sppp_auth_send(const struct cp *cp, 291 struct sppp *sp, unsigned int type, unsigned int id, 292 ...); 293 294 static void sppp_up_event(const struct cp *cp, struct sppp *sp); 295 static void sppp_down_event(const struct cp *cp, struct sppp *sp); 296 static void sppp_open_event(const struct cp *cp, struct sppp *sp); 297 static void sppp_close_event(const struct cp *cp, struct sppp *sp); 298 static void sppp_to_event(const struct cp *cp, struct sppp *sp); 299 300 static void sppp_null(struct sppp *sp); 301 302 static void sppp_lcp_init(struct sppp *sp); 303 static void sppp_lcp_up(struct sppp *sp); 304 static void sppp_lcp_down(struct sppp *sp); 305 static void sppp_lcp_open(struct sppp *sp); 306 static void sppp_lcp_close(struct sppp *sp); 307 static void sppp_lcp_TO(void *sp); 308 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 309 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 310 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 311 static void sppp_lcp_tlu(struct sppp *sp); 312 static void sppp_lcp_tld(struct sppp *sp); 313 static void sppp_lcp_tls(struct sppp *sp); 314 static void sppp_lcp_tlf(struct sppp *sp); 315 static void sppp_lcp_scr(struct sppp *sp); 316 static void sppp_lcp_check_and_close(struct sppp *sp); 317 static int sppp_ncp_check(struct sppp *sp); 318 319 static void sppp_ipcp_init(struct sppp *sp); 320 static void sppp_ipcp_up(struct sppp *sp); 321 static void sppp_ipcp_down(struct sppp *sp); 322 static void sppp_ipcp_open(struct sppp *sp); 323 static void sppp_ipcp_close(struct sppp *sp); 324 static void sppp_ipcp_TO(void *sp); 325 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 326 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 327 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 328 static void sppp_ipcp_tlu(struct sppp *sp); 329 static void sppp_ipcp_tld(struct sppp *sp); 330 static void sppp_ipcp_tls(struct sppp *sp); 331 static void sppp_ipcp_tlf(struct sppp *sp); 332 static void sppp_ipcp_scr(struct sppp *sp); 333 334 static void sppp_ipv6cp_init(struct sppp *sp); 335 static void sppp_ipv6cp_up(struct sppp *sp); 336 static void sppp_ipv6cp_down(struct sppp *sp); 337 static void sppp_ipv6cp_open(struct sppp *sp); 338 static void sppp_ipv6cp_close(struct sppp *sp); 339 static void sppp_ipv6cp_TO(void *sp); 340 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len); 341 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 342 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 343 static void sppp_ipv6cp_tlu(struct sppp *sp); 344 static void sppp_ipv6cp_tld(struct sppp *sp); 345 static void sppp_ipv6cp_tls(struct sppp *sp); 346 static void sppp_ipv6cp_tlf(struct sppp *sp); 347 static void sppp_ipv6cp_scr(struct sppp *sp); 348 349 static void sppp_pap_input(struct sppp *sp, struct mbuf *m); 350 static void sppp_pap_init(struct sppp *sp); 351 static void sppp_pap_open(struct sppp *sp); 352 static void sppp_pap_close(struct sppp *sp); 353 static void sppp_pap_TO(void *sp); 354 static void sppp_pap_my_TO(void *sp); 355 static void sppp_pap_tlu(struct sppp *sp); 356 static void sppp_pap_tld(struct sppp *sp); 357 static void sppp_pap_scr(struct sppp *sp); 358 359 static void sppp_chap_input(struct sppp *sp, struct mbuf *m); 360 static void sppp_chap_init(struct sppp *sp); 361 static void sppp_chap_open(struct sppp *sp); 362 static void sppp_chap_close(struct sppp *sp); 363 static void sppp_chap_TO(void *sp); 364 static void sppp_chap_tlu(struct sppp *sp); 365 static void sppp_chap_tld(struct sppp *sp); 366 static void sppp_chap_scr(struct sppp *sp); 367 368 static const char *sppp_auth_type_name(u_short proto, u_char type); 369 static const char *sppp_cp_type_name(u_char type); 370 static const char *sppp_dotted_quad(u_int32_t addr); 371 static const char *sppp_ipcp_opt_name(u_char opt); 372 #ifdef INET6 373 static const char *sppp_ipv6cp_opt_name(u_char opt); 374 #endif 375 static const char *sppp_lcp_opt_name(u_char opt); 376 static const char *sppp_phase_name(int phase); 377 static const char *sppp_proto_name(u_short proto); 378 static const char *sppp_state_name(int state); 379 static int sppp_params(struct sppp *sp, int cmd, void *data); 380 #ifdef INET 381 static void sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, 382 u_int32_t *srcmask); 383 static void sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr); 384 static void sppp_clear_ip_addrs(struct sppp *sp); 385 #endif 386 static void sppp_keepalive(void *dummy); 387 static void sppp_phase_network(struct sppp *sp); 388 static void sppp_print_bytes(const u_char *p, u_short len); 389 static void sppp_print_string(const char *p, u_short len); 390 #ifdef INET6 391 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, 392 struct in6_addr *dst, struct in6_addr *srcmask); 393 #ifdef IPV6CP_MYIFID_DYN 394 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src); 395 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src); 396 #endif 397 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src); 398 #endif 399 400 /* our control protocol descriptors */ 401 static const struct cp lcp = { 402 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 403 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close, 404 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak, 405 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf, 406 sppp_lcp_scr 407 }; 408 409 static const struct cp ipcp = { 410 PPP_IPCP, IDX_IPCP, 411 #ifdef INET 412 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 413 #else 414 0, 415 #endif 416 "ipcp", 417 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close, 418 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak, 419 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf, 420 sppp_ipcp_scr 421 }; 422 423 static const struct cp ipv6cp = { 424 PPP_IPV6CP, IDX_IPV6CP, 425 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 426 CP_NCP, 427 #else 428 0, 429 #endif 430 "ipv6cp", 431 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close, 432 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak, 433 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf, 434 sppp_ipv6cp_scr 435 }; 436 437 static const struct cp pap = { 438 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 439 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close, 440 sppp_pap_TO, 0, 0, 0, 441 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null, 442 sppp_pap_scr 443 }; 444 445 static const struct cp chap = { 446 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 447 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close, 448 sppp_chap_TO, 0, 0, 0, 449 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null, 450 sppp_chap_scr 451 }; 452 453 static const struct cp *cps[IDX_COUNT] = { 454 &lcp, /* IDX_LCP */ 455 &ipcp, /* IDX_IPCP */ 456 &ipv6cp, /* IDX_IPV6CP */ 457 &pap, /* IDX_PAP */ 458 &chap, /* IDX_CHAP */ 459 }; 460 461 462 void spppattach(int); 463 void 464 /*ARGSUSED*/ 465 spppattach(int count) 466 { 467 } 468 469 /* 470 * Exported functions, comprising our interface to the lower layer. 471 */ 472 473 /* 474 * Process the received packet. 475 */ 476 void 477 sppp_input(struct ifnet *ifp, struct mbuf *m) 478 { 479 struct ppp_header *h = NULL; 480 struct ifqueue *inq = 0; 481 u_int16_t protocol; 482 int s; 483 struct sppp *sp = (struct sppp *)ifp; 484 int debug = ifp->if_flags & IFF_DEBUG; 485 486 if (ifp->if_flags & IFF_UP) { 487 /* Count received bytes, add hardware framing */ 488 ifp->if_ibytes += m->m_pkthdr.len + sp->pp_framebytes; 489 /* Note time of last receive */ 490 sp->pp_last_receive = time_uptime; 491 } 492 493 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 494 /* Too small packet, drop it. */ 495 if (debug) 496 log(LOG_DEBUG, 497 "%s: input packet is too small, %d bytes\n", 498 ifp->if_xname, m->m_pkthdr.len); 499 drop: 500 ++ifp->if_ierrors; 501 ++ifp->if_iqdrops; 502 m_freem(m); 503 return; 504 } 505 506 if (sp->pp_flags & PP_NOFRAMING) { 507 memcpy(&protocol, mtod(m, void *), 2); 508 protocol = ntohs(protocol); 509 m_adj(m, 2); 510 } else { 511 512 /* Get PPP header. */ 513 h = mtod(m, struct ppp_header *); 514 m_adj(m, PPP_HEADER_LEN); 515 516 switch (h->address) { 517 case PPP_ALLSTATIONS: 518 if (h->control != PPP_UI) 519 goto invalid; 520 if (sp->pp_flags & PP_CISCO) { 521 if (debug) 522 log(LOG_DEBUG, 523 "%s: PPP packet in Cisco mode " 524 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 525 ifp->if_xname, 526 h->address, h->control, ntohs(h->protocol)); 527 goto drop; 528 } 529 break; 530 case CISCO_MULTICAST: 531 case CISCO_UNICAST: 532 /* Don't check the control field here (RFC 1547). */ 533 if (! (sp->pp_flags & PP_CISCO)) { 534 if (debug) 535 log(LOG_DEBUG, 536 "%s: Cisco packet in PPP mode " 537 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 538 ifp->if_xname, 539 h->address, h->control, ntohs(h->protocol)); 540 goto drop; 541 } 542 switch (ntohs(h->protocol)) { 543 default: 544 ++ifp->if_noproto; 545 goto invalid; 546 case CISCO_KEEPALIVE: 547 sppp_cisco_input((struct sppp *) ifp, m); 548 m_freem(m); 549 return; 550 #ifdef INET 551 case ETHERTYPE_IP: 552 schednetisr(NETISR_IP); 553 inq = &ipintrq; 554 break; 555 #endif 556 #ifdef INET6 557 case ETHERTYPE_IPV6: 558 schednetisr(NETISR_IPV6); 559 inq = &ip6intrq; 560 break; 561 #endif 562 #ifdef IPX 563 case ETHERTYPE_IPX: 564 schednetisr(NETISR_IPX); 565 inq = &ipxintrq; 566 break; 567 #endif 568 #ifdef NS 569 case ETHERTYPE_NS: 570 schednetisr(NETISR_NS); 571 inq = &nsintrq; 572 break; 573 #endif 574 } 575 goto queue_pkt; 576 default: /* Invalid PPP packet. */ 577 invalid: 578 if (debug) 579 log(LOG_DEBUG, 580 "%s: invalid input packet " 581 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 582 ifp->if_xname, 583 h->address, h->control, ntohs(h->protocol)); 584 goto drop; 585 } 586 protocol = ntohs(h->protocol); 587 } 588 589 switch (protocol) { 590 default: 591 if (sp->state[IDX_LCP] == STATE_OPENED) { 592 u_int16_t prot = htons(protocol); 593 sppp_cp_send(sp, PPP_LCP, PROTO_REJ, 594 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2, 595 &prot); 596 } 597 if (debug) 598 log(LOG_DEBUG, 599 "%s: invalid input protocol " 600 "<proto=0x%x>\n", ifp->if_xname, ntohs(protocol)); 601 ++ifp->if_noproto; 602 goto drop; 603 case PPP_LCP: 604 sppp_cp_input(&lcp, sp, m); 605 m_freem(m); 606 return; 607 case PPP_PAP: 608 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 609 sppp_pap_input(sp, m); 610 m_freem(m); 611 return; 612 case PPP_CHAP: 613 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 614 sppp_chap_input(sp, m); 615 m_freem(m); 616 return; 617 #ifdef INET 618 case PPP_IPCP: 619 if (sp->pp_phase == SPPP_PHASE_NETWORK) 620 sppp_cp_input(&ipcp, sp, m); 621 m_freem(m); 622 return; 623 case PPP_IP: 624 if (sp->state[IDX_IPCP] == STATE_OPENED) { 625 schednetisr(NETISR_IP); 626 inq = &ipintrq; 627 sp->pp_last_activity = time_uptime; 628 } 629 break; 630 #endif 631 #ifdef INET6 632 case PPP_IPV6CP: 633 if (sp->pp_phase == SPPP_PHASE_NETWORK) 634 sppp_cp_input(&ipv6cp, sp, m); 635 m_freem(m); 636 return; 637 638 case PPP_IPV6: 639 if (sp->state[IDX_IPV6CP] == STATE_OPENED) { 640 schednetisr(NETISR_IPV6); 641 inq = &ip6intrq; 642 sp->pp_last_activity = time_uptime; 643 } 644 break; 645 #endif 646 #ifdef IPX 647 case PPP_IPX: 648 /* IPX IPXCP not implemented yet */ 649 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 650 schednetisr(NETISR_IPX); 651 inq = &ipxintrq; 652 } 653 break; 654 #endif 655 #ifdef NS 656 case PPP_XNS: 657 /* XNS IDPCP not implemented yet */ 658 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 659 schednetisr(NETISR_NS); 660 inq = &nsintrq; 661 } 662 break; 663 #endif 664 #ifdef ISO 665 case PPP_ISO: 666 /* OSI NLCP not implemented yet */ 667 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 668 schednetisr(NETISR_ISO); 669 inq = &clnlintrq; 670 } 671 break; 672 #endif 673 } 674 675 queue_pkt: 676 if (! (ifp->if_flags & IFF_UP) || ! inq) 677 goto drop; 678 679 /* Check queue. */ 680 s = splnet(); 681 if (IF_QFULL(inq)) { 682 /* Queue overflow. */ 683 IF_DROP(inq); 684 splx(s); 685 if (debug) 686 log(LOG_DEBUG, "%s: protocol queue overflow\n", 687 ifp->if_xname); 688 goto drop; 689 } 690 IF_ENQUEUE(inq, m); 691 splx(s); 692 } 693 694 /* 695 * Enqueue transmit packet. 696 */ 697 static int 698 sppp_output(struct ifnet *ifp, struct mbuf *m, 699 struct sockaddr *dst, struct rtentry *rt) 700 { 701 struct sppp *sp = (struct sppp *) ifp; 702 struct ppp_header *h = NULL; 703 struct ifqueue *ifq = NULL; /* XXX */ 704 int s, error = 0; 705 u_int16_t protocol; 706 ALTQ_DECL(struct altq_pktattr pktattr;) 707 708 s = splnet(); 709 710 sp->pp_last_activity = time_uptime; 711 712 if ((ifp->if_flags & IFF_UP) == 0 || 713 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 714 m_freem(m); 715 splx(s); 716 return (ENETDOWN); 717 } 718 719 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 720 /* 721 * Interface is not yet running, but auto-dial. Need 722 * to start LCP for it. 723 */ 724 ifp->if_flags |= IFF_RUNNING; 725 splx(s); 726 lcp.Open(sp); 727 s = splnet(); 728 } 729 730 /* 731 * If the queueing discipline needs packet classification, 732 * do it before prepending link headers. 733 */ 734 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family, &pktattr); 735 736 #ifdef INET 737 if (dst->sa_family == AF_INET) { 738 struct ip *ip = NULL; 739 struct tcphdr *th = NULL; 740 741 if (m->m_len >= sizeof(struct ip)) { 742 ip = mtod(m, struct ip *); 743 if (ip->ip_p == IPPROTO_TCP && 744 m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) + 745 sizeof(struct tcphdr)) { 746 th = (struct tcphdr *) 747 ((caddr_t)ip + (ip->ip_hl << 2)); 748 } 749 } else 750 ip = NULL; 751 752 /* 753 * When using dynamic local IP address assignment by using 754 * 0.0.0.0 as a local address, the first TCP session will 755 * not connect because the local TCP checksum is computed 756 * using 0.0.0.0 which will later become our real IP address 757 * so the TCP checksum computed at the remote end will 758 * become invalid. So we 759 * - don't let packets with src ip addr 0 thru 760 * - we flag TCP packets with src ip 0 as an error 761 */ 762 if (ip && ip->ip_src.s_addr == INADDR_ANY) { 763 u_int8_t proto = ip->ip_p; 764 765 m_freem(m); 766 splx(s); 767 if (proto == IPPROTO_TCP) 768 return (EADDRNOTAVAIL); 769 else 770 return (0); 771 } 772 773 /* 774 * Put low delay, telnet, rlogin and ftp control packets 775 * in front of the queue. 776 */ 777 778 if (!IF_QFULL(&sp->pp_fastq) && 779 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || 780 (th && (INTERACTIVE(ntohs(th->th_sport)) || 781 INTERACTIVE(ntohs(th->th_dport)))))) 782 ifq = &sp->pp_fastq; 783 } 784 #endif 785 786 #ifdef INET6 787 if (dst->sa_family == AF_INET6) { 788 /* XXX do something tricky here? */ 789 } 790 #endif 791 792 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 793 /* 794 * Prepend general data packet PPP header. For now, IP only. 795 */ 796 M_PREPEND(m, PPP_HEADER_LEN, M_DONTWAIT); 797 if (! m) { 798 if (ifp->if_flags & IFF_DEBUG) 799 log(LOG_DEBUG, "%s: no memory for transmit header\n", 800 ifp->if_xname); 801 ++ifp->if_oerrors; 802 splx(s); 803 return (ENOBUFS); 804 } 805 /* 806 * May want to check size of packet 807 * (albeit due to the implementation it's always enough) 808 */ 809 h = mtod(m, struct ppp_header *); 810 if (sp->pp_flags & PP_CISCO) { 811 h->address = CISCO_UNICAST; /* unicast address */ 812 h->control = 0; 813 } else { 814 h->address = PPP_ALLSTATIONS; /* broadcast address */ 815 h->control = PPP_UI; /* Unnumbered Info */ 816 } 817 } 818 819 switch (dst->sa_family) { 820 #ifdef INET 821 case AF_INET: /* Internet Protocol */ 822 if (sp->pp_flags & PP_CISCO) 823 protocol = htons(ETHERTYPE_IP); 824 else { 825 /* 826 * Don't choke with an ENETDOWN early. It's 827 * possible that we just started dialing out, 828 * so don't drop the packet immediately. If 829 * we notice that we run out of buffer space 830 * below, we will however remember that we are 831 * not ready to carry IP packets, and return 832 * ENETDOWN, as opposed to ENOBUFS. 833 */ 834 protocol = htons(PPP_IP); 835 if (sp->state[IDX_IPCP] != STATE_OPENED) 836 error = ENETDOWN; 837 } 838 break; 839 #endif 840 #ifdef INET6 841 case AF_INET6: /* Internet Protocol version 6 */ 842 if (sp->pp_flags & PP_CISCO) 843 protocol = htons(ETHERTYPE_IPV6); 844 else { 845 /* 846 * Don't choke with an ENETDOWN early. It's 847 * possible that we just started dialing out, 848 * so don't drop the packet immediately. If 849 * we notice that we run out of buffer space 850 * below, we will however remember that we are 851 * not ready to carry IP packets, and return 852 * ENETDOWN, as opposed to ENOBUFS. 853 */ 854 protocol = htons(PPP_IPV6); 855 if (sp->state[IDX_IPV6CP] != STATE_OPENED) 856 error = ENETDOWN; 857 } 858 break; 859 #endif 860 #ifdef NS 861 case AF_NS: /* Xerox NS Protocol */ 862 protocol = htons((sp->pp_flags & PP_CISCO) ? 863 ETHERTYPE_NS : PPP_XNS); 864 break; 865 #endif 866 #ifdef IPX 867 case AF_IPX: /* Novell IPX Protocol */ 868 protocol = htons((sp->pp_flags & PP_CISCO) ? 869 ETHERTYPE_IPX : PPP_IPX); 870 break; 871 #endif 872 #ifdef ISO 873 case AF_ISO: /* ISO OSI Protocol */ 874 if (sp->pp_flags & PP_CISCO) 875 goto nosupport; 876 protocol = htons(PPP_ISO); 877 break; 878 nosupport: 879 #endif 880 default: 881 m_freem(m); 882 ++ifp->if_oerrors; 883 splx(s); 884 return (EAFNOSUPPORT); 885 } 886 887 if (sp->pp_flags & PP_NOFRAMING) { 888 M_PREPEND(m, 2, M_DONTWAIT); 889 if (m == NULL) { 890 if (ifp->if_flags & IFF_DEBUG) 891 log(LOG_DEBUG, "%s: no memory for transmit header\n", 892 ifp->if_xname); 893 ++ifp->if_oerrors; 894 splx(s); 895 return (ENOBUFS); 896 } 897 *mtod(m, u_int16_t *) = protocol; 898 } else { 899 h->protocol = protocol; 900 } 901 902 903 error = ifq_enqueue2(ifp, ifq, m ALTQ_COMMA ALTQ_DECL(&pktattr)); 904 905 if (error == 0) { 906 /* 907 * Count output packets and bytes. 908 * The packet length includes header + additional hardware 909 * framing according to RFC 1333. 910 */ 911 if (!(ifp->if_flags & IFF_OACTIVE)) 912 (*ifp->if_start)(ifp); 913 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 914 } 915 splx(s); 916 return error; 917 } 918 919 void 920 sppp_attach(struct ifnet *ifp) 921 { 922 struct sppp *sp = (struct sppp *) ifp; 923 924 /* Initialize keepalive handler. */ 925 if (! spppq) { 926 callout_init(&keepalive_ch); 927 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 928 } 929 930 /* Insert new entry into the keepalive list. */ 931 sp->pp_next = spppq; 932 spppq = sp; 933 934 sp->pp_if.if_type = IFT_PPP; 935 sp->pp_if.if_output = sppp_output; 936 sp->pp_fastq.ifq_maxlen = 32; 937 sp->pp_cpq.ifq_maxlen = 20; 938 sp->pp_loopcnt = 0; 939 sp->pp_alivecnt = 0; 940 sp->pp_last_activity = 0; 941 sp->pp_last_receive = 0; 942 sp->pp_maxalive = DEFAULT_MAXALIVECNT; 943 sp->pp_max_noreceive = DEFAULT_NORECV_TIME; 944 sp->pp_idle_timeout = 0; 945 memset(&sp->pp_seq[0], 0, sizeof(sp->pp_seq)); 946 memset(&sp->pp_rseq[0], 0, sizeof(sp->pp_rseq)); 947 sp->pp_auth_failures = 0; 948 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 949 sp->pp_phase = SPPP_PHASE_DEAD; 950 sp->pp_up = lcp.Up; 951 sp->pp_down = lcp.Down; 952 953 if_alloc_sadl(ifp); 954 955 memset(&sp->myauth, 0, sizeof sp->myauth); 956 memset(&sp->hisauth, 0, sizeof sp->hisauth); 957 sppp_lcp_init(sp); 958 sppp_ipcp_init(sp); 959 sppp_ipv6cp_init(sp); 960 sppp_pap_init(sp); 961 sppp_chap_init(sp); 962 } 963 964 void 965 sppp_detach(struct ifnet *ifp) 966 { 967 struct sppp **q, *p, *sp = (struct sppp *) ifp; 968 int i; 969 970 /* Remove the entry from the keepalive list. */ 971 for (q = &spppq; (p = *q); q = &p->pp_next) 972 if (p == sp) { 973 *q = p->pp_next; 974 break; 975 } 976 977 /* Stop keepalive handler. */ 978 if (! spppq) { 979 callout_stop(&keepalive_ch); 980 } 981 982 for (i = 0; i < IDX_COUNT; i++) { 983 callout_stop(&sp->ch[i]); 984 } 985 callout_stop(&sp->pap_my_to_ch); 986 987 /* free authentication info */ 988 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 989 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 990 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 991 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 992 993 #if 0 /* done in if_detach() */ 994 if_free_sadl(ifp); 995 #endif 996 } 997 998 /* 999 * Flush the interface output queue. 1000 */ 1001 void 1002 sppp_flush(struct ifnet *ifp) 1003 { 1004 struct sppp *sp = (struct sppp *) ifp; 1005 1006 IFQ_PURGE(&sp->pp_if.if_snd); 1007 IF_PURGE(&sp->pp_fastq); 1008 IF_PURGE(&sp->pp_cpq); 1009 } 1010 1011 /* 1012 * Check if the output queue is empty. 1013 */ 1014 int 1015 sppp_isempty(struct ifnet *ifp) 1016 { 1017 struct sppp *sp = (struct sppp *) ifp; 1018 int empty, s; 1019 1020 s = splnet(); 1021 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1022 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1023 splx(s); 1024 return (empty); 1025 } 1026 1027 /* 1028 * Get next packet to send. 1029 */ 1030 struct mbuf * 1031 sppp_dequeue(struct ifnet *ifp) 1032 { 1033 struct sppp *sp = (struct sppp *) ifp; 1034 struct mbuf *m; 1035 int s; 1036 1037 s = splnet(); 1038 /* 1039 * Process only the control protocol queue until we have at 1040 * least one NCP open. 1041 * 1042 * Do always serve all three queues in Cisco mode. 1043 */ 1044 IF_DEQUEUE(&sp->pp_cpq, m); 1045 if (m == NULL && 1046 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { 1047 IF_DEQUEUE(&sp->pp_fastq, m); 1048 if (m == NULL) 1049 IFQ_DEQUEUE(&sp->pp_if.if_snd, m); 1050 } 1051 splx(s); 1052 return m; 1053 } 1054 1055 /* 1056 * Process an ioctl request. Called on low priority level. 1057 */ 1058 int 1059 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1060 { 1061 struct ifreq *ifr = (struct ifreq *) data; 1062 struct sppp *sp = (struct sppp *) ifp; 1063 int s, error=0, going_up, going_down, newmode; 1064 1065 s = splnet(); 1066 switch (cmd) { 1067 case SIOCAIFADDR: 1068 case SIOCSIFDSTADDR: 1069 case SIOCSIFADDR: 1070 break; 1071 1072 case SIOCSIFFLAGS: 1073 going_up = ifp->if_flags & IFF_UP && 1074 (ifp->if_flags & IFF_RUNNING) == 0; 1075 going_down = (ifp->if_flags & IFF_UP) == 0 && 1076 ifp->if_flags & IFF_RUNNING; 1077 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1078 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1079 /* sanity */ 1080 newmode = IFF_PASSIVE; 1081 ifp->if_flags &= ~IFF_AUTO; 1082 } 1083 1084 if (going_up || going_down) 1085 lcp.Close(sp); 1086 if (going_up && newmode == 0) { 1087 /* neither auto-dial nor passive */ 1088 ifp->if_flags |= IFF_RUNNING; 1089 if (!(sp->pp_flags & PP_CISCO)) 1090 lcp.Open(sp); 1091 } else if (going_down) { 1092 sppp_flush(ifp); 1093 ifp->if_flags &= ~IFF_RUNNING; 1094 } 1095 1096 break; 1097 1098 #ifdef SIOCSIFMTU 1099 #ifndef ifr_mtu 1100 #define ifr_mtu ifr_metric 1101 #endif 1102 case SIOCSIFMTU: 1103 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru) { 1104 error = EINVAL; 1105 break; 1106 } 1107 1108 ifp->if_mtu = ifr->ifr_mtu; 1109 break; 1110 #endif 1111 #ifdef SLIOCSETMTU 1112 case SLIOCSETMTU: 1113 if (*(short *)data < 128 || *(short *)data > sp->lcp.their_mru) 1114 { 1115 error = EINVAL; 1116 break; 1117 } 1118 1119 ifp->if_mtu = *(short *)data; 1120 break; 1121 #endif 1122 #ifdef SIOCGIFMTU 1123 case SIOCGIFMTU: 1124 ifr->ifr_mtu = ifp->if_mtu; 1125 break; 1126 #endif 1127 #ifdef SLIOCGETMTU 1128 case SLIOCGETMTU: 1129 *(short *)data = ifp->if_mtu; 1130 break; 1131 #endif 1132 case SIOCADDMULTI: 1133 case SIOCDELMULTI: 1134 break; 1135 1136 case SPPPSETAUTHCFG: 1137 case SPPPGETAUTHCFG: 1138 case SPPPSETLCPCFG: 1139 case SPPPGETLCPCFG: 1140 case SPPPSETIDLETO: 1141 case SPPPSETAUTHFAILURE: 1142 case SPPPGETAUTHFAILURES: 1143 case SPPPSETDNSOPTS: 1144 case SPPPSETKEEPALIVE: 1145 { 1146 struct proc *p = curproc; /* XXX */ 1147 1148 if ((error = kauth_authorize_generic(p->p_cred, KAUTH_GENERIC_ISSUSER, &p->p_acflag)) != 0) 1149 break; 1150 } 1151 /* FALLTHROUGH */ 1152 case SPPPGETSTATUS: 1153 case SPPPGETSTATUSNCP: 1154 case SPPPGETIDLETO: 1155 case SPPPGETDNSOPTS: 1156 case SPPPGETDNSADDRS: 1157 case SPPPGETKEEPALIVE: 1158 error = sppp_params(sp, cmd, data); 1159 break; 1160 1161 default: 1162 error = ENOTTY; 1163 } 1164 splx(s); 1165 return (error); 1166 } 1167 1168 1169 /* 1170 * Cisco framing implementation. 1171 */ 1172 1173 /* 1174 * Handle incoming Cisco keepalive protocol packets. 1175 */ 1176 static void 1177 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1178 { 1179 STDDCL; 1180 struct cisco_packet *h; 1181 #ifdef INET 1182 u_int32_t me, mymask = 0; /* XXX: GCC */ 1183 #endif 1184 1185 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1186 if (debug) 1187 log(LOG_DEBUG, 1188 "%s: cisco invalid packet length: %d bytes\n", 1189 ifp->if_xname, m->m_pkthdr.len); 1190 return; 1191 } 1192 h = mtod(m, struct cisco_packet *); 1193 if (debug) 1194 log(LOG_DEBUG, 1195 "%s: cisco input: %d bytes " 1196 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1197 ifp->if_xname, m->m_pkthdr.len, 1198 ntohl(h->type), h->par1, h->par2, (u_int)h->rel, 1199 (u_int)h->time0, (u_int)h->time1); 1200 switch (ntohl(h->type)) { 1201 default: 1202 if (debug) 1203 addlog("%s: cisco unknown packet type: 0x%x\n", 1204 ifp->if_xname, ntohl(h->type)); 1205 break; 1206 case CISCO_ADDR_REPLY: 1207 /* Reply on address request, ignore */ 1208 break; 1209 case CISCO_KEEPALIVE_REQ: 1210 sp->pp_alivecnt = 0; 1211 sp->pp_rseq[IDX_LCP] = ntohl(h->par1); 1212 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 1213 /* Local and remote sequence numbers are equal. 1214 * Probably, the line is in loopback mode. */ 1215 if (sp->pp_loopcnt >= LOOPALIVECNT) { 1216 printf ("%s: loopback\n", 1217 ifp->if_xname); 1218 sp->pp_loopcnt = 0; 1219 if (ifp->if_flags & IFF_UP) { 1220 if_down(ifp); 1221 IF_PURGE(&sp->pp_cpq); 1222 } 1223 } 1224 ++sp->pp_loopcnt; 1225 1226 /* Generate new local sequence number */ 1227 sp->pp_seq[IDX_LCP] = arc4random(); 1228 break; 1229 } 1230 sp->pp_loopcnt = 0; 1231 if (! (ifp->if_flags & IFF_UP) && 1232 (ifp->if_flags & IFF_RUNNING)) { 1233 if_up(ifp); 1234 } 1235 break; 1236 case CISCO_ADDR_REQ: 1237 #ifdef INET 1238 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1239 if (me != 0L) 1240 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1241 #endif 1242 break; 1243 } 1244 } 1245 1246 /* 1247 * Send Cisco keepalive packet. 1248 */ 1249 static void 1250 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1251 { 1252 STDDCL; 1253 struct ppp_header *h; 1254 struct cisco_packet *ch; 1255 struct mbuf *m; 1256 u_int32_t t; 1257 1258 t = time_uptime * 1000; 1259 MGETHDR(m, M_DONTWAIT, MT_DATA); 1260 if (! m) 1261 return; 1262 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1263 m->m_pkthdr.rcvif = 0; 1264 1265 h = mtod(m, struct ppp_header *); 1266 h->address = CISCO_MULTICAST; 1267 h->control = 0; 1268 h->protocol = htons(CISCO_KEEPALIVE); 1269 1270 ch = (struct cisco_packet *)(h + 1); 1271 ch->type = htonl(type); 1272 ch->par1 = htonl(par1); 1273 ch->par2 = htonl(par2); 1274 ch->rel = -1; 1275 1276 ch->time0 = htons((u_short)(t >> 16)); 1277 ch->time1 = htons((u_short) t); 1278 1279 if (debug) 1280 log(LOG_DEBUG, 1281 "%s: cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1282 ifp->if_xname, ntohl(ch->type), ch->par1, 1283 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1284 (u_int)ch->time1); 1285 1286 if (IF_QFULL(&sp->pp_cpq)) { 1287 IF_DROP(&sp->pp_fastq); 1288 IF_DROP(&ifp->if_snd); 1289 m_freem(m); 1290 ++ifp->if_oerrors; 1291 return; 1292 } else 1293 IF_ENQUEUE(&sp->pp_cpq, m); 1294 if (! (ifp->if_flags & IFF_OACTIVE)) 1295 (*ifp->if_start)(ifp); 1296 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1297 } 1298 1299 /* 1300 * PPP protocol implementation. 1301 */ 1302 1303 /* 1304 * Send PPP control protocol packet. 1305 */ 1306 static void 1307 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1308 u_char ident, u_short len, void *data) 1309 { 1310 STDDCL; 1311 struct lcp_header *lh; 1312 struct mbuf *m; 1313 size_t pkthdrlen; 1314 1315 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1316 1317 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1318 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1319 MGETHDR(m, M_DONTWAIT, MT_DATA); 1320 if (! m) 1321 return; 1322 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1323 m->m_pkthdr.rcvif = 0; 1324 1325 if (sp->pp_flags & PP_NOFRAMING) { 1326 *mtod(m, u_int16_t *) = htons(proto); 1327 lh = (struct lcp_header *)(mtod(m, u_int8_t *) + 2); 1328 } else { 1329 struct ppp_header *h; 1330 h = mtod(m, struct ppp_header *); 1331 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1332 h->control = PPP_UI; /* Unnumbered Info */ 1333 h->protocol = htons(proto); /* Link Control Protocol */ 1334 lh = (struct lcp_header *)(h + 1); 1335 } 1336 lh->type = type; 1337 lh->ident = ident; 1338 lh->len = htons(LCP_HEADER_LEN + len); 1339 if (len) 1340 bcopy (data, lh + 1, len); 1341 1342 if (debug) { 1343 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 1344 ifp->if_xname, 1345 sppp_proto_name(proto), 1346 sppp_cp_type_name(lh->type), lh->ident, ntohs(lh->len)); 1347 if (len) 1348 sppp_print_bytes((u_char *)(lh + 1), len); 1349 addlog(">\n"); 1350 } 1351 if (IF_QFULL(&sp->pp_cpq)) { 1352 IF_DROP(&sp->pp_fastq); 1353 IF_DROP(&ifp->if_snd); 1354 m_freem(m); 1355 ++ifp->if_oerrors; 1356 return; 1357 } else 1358 IF_ENQUEUE(&sp->pp_cpq, m); 1359 if (! (ifp->if_flags & IFF_OACTIVE)) 1360 (*ifp->if_start)(ifp); 1361 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1362 } 1363 1364 /* 1365 * Handle incoming PPP control protocol packets. 1366 */ 1367 static void 1368 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1369 { 1370 STDDCL; 1371 struct lcp_header *h; 1372 int len = m->m_pkthdr.len; 1373 int rv; 1374 u_char *p; 1375 u_int32_t u32; 1376 1377 if (len < 4) { 1378 if (debug) 1379 log(LOG_DEBUG, 1380 "%s: %s invalid packet length: %d bytes\n", 1381 ifp->if_xname, cp->name, len); 1382 return; 1383 } 1384 h = mtod(m, struct lcp_header *); 1385 if (debug) { 1386 log(LOG_DEBUG, 1387 "%s: %s input(%s): <%s id=0x%x len=%d", 1388 ifp->if_xname, cp->name, 1389 sppp_state_name(sp->state[cp->protoidx]), 1390 sppp_cp_type_name(h->type), h->ident, ntohs(h->len)); 1391 if (len > 4) 1392 sppp_print_bytes((u_char *)(h + 1), len - 4); 1393 addlog(">\n"); 1394 } 1395 if (len > ntohs(h->len)) 1396 len = ntohs(h->len); 1397 p = (u_char *)(h + 1); 1398 switch (h->type) { 1399 case CONF_REQ: 1400 if (len < 4) { 1401 if (debug) 1402 addlog("%s: %s invalid conf-req length %d\n", 1403 ifp->if_xname, cp->name, 1404 len); 1405 ++ifp->if_ierrors; 1406 break; 1407 } 1408 /* handle states where RCR doesn't get a SCA/SCN */ 1409 switch (sp->state[cp->protoidx]) { 1410 case STATE_CLOSING: 1411 case STATE_STOPPING: 1412 return; 1413 case STATE_CLOSED: 1414 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1415 0, 0); 1416 return; 1417 } 1418 rv = (cp->RCR)(sp, h, len); 1419 switch (sp->state[cp->protoidx]) { 1420 case STATE_OPENED: 1421 (cp->tld)(sp); 1422 (cp->scr)(sp); 1423 /* fall through... */ 1424 case STATE_ACK_SENT: 1425 case STATE_REQ_SENT: 1426 sppp_cp_change_state(cp, sp, rv? 1427 STATE_ACK_SENT: STATE_REQ_SENT); 1428 break; 1429 case STATE_STOPPED: 1430 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1431 (cp->scr)(sp); 1432 sppp_cp_change_state(cp, sp, rv? 1433 STATE_ACK_SENT: STATE_REQ_SENT); 1434 break; 1435 case STATE_ACK_RCVD: 1436 if (rv) { 1437 sppp_cp_change_state(cp, sp, STATE_OPENED); 1438 if (debug) 1439 log(LOG_DEBUG, "%s: %s tlu\n", 1440 ifp->if_xname, 1441 cp->name); 1442 (cp->tlu)(sp); 1443 } else 1444 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1445 break; 1446 default: 1447 printf("%s: %s illegal %s in state %s\n", 1448 ifp->if_xname, cp->name, 1449 sppp_cp_type_name(h->type), 1450 sppp_state_name(sp->state[cp->protoidx])); 1451 ++ifp->if_ierrors; 1452 } 1453 break; 1454 case CONF_ACK: 1455 if (h->ident != sp->confid[cp->protoidx]) { 1456 if (debug) 1457 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1458 ifp->if_xname, cp->name, 1459 h->ident, sp->confid[cp->protoidx]); 1460 ++ifp->if_ierrors; 1461 break; 1462 } 1463 switch (sp->state[cp->protoidx]) { 1464 case STATE_CLOSED: 1465 case STATE_STOPPED: 1466 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1467 break; 1468 case STATE_CLOSING: 1469 case STATE_STOPPING: 1470 break; 1471 case STATE_REQ_SENT: 1472 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1473 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1474 break; 1475 case STATE_OPENED: 1476 (cp->tld)(sp); 1477 /* fall through */ 1478 case STATE_ACK_RCVD: 1479 (cp->scr)(sp); 1480 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1481 break; 1482 case STATE_ACK_SENT: 1483 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1484 sppp_cp_change_state(cp, sp, STATE_OPENED); 1485 if (debug) 1486 log(LOG_DEBUG, "%s: %s tlu\n", 1487 ifp->if_xname, cp->name); 1488 (cp->tlu)(sp); 1489 break; 1490 default: 1491 printf("%s: %s illegal %s in state %s\n", 1492 ifp->if_xname, cp->name, 1493 sppp_cp_type_name(h->type), 1494 sppp_state_name(sp->state[cp->protoidx])); 1495 ++ifp->if_ierrors; 1496 } 1497 break; 1498 case CONF_NAK: 1499 case CONF_REJ: 1500 if (h->ident != sp->confid[cp->protoidx]) { 1501 if (debug) 1502 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1503 ifp->if_xname, cp->name, 1504 h->ident, sp->confid[cp->protoidx]); 1505 ++ifp->if_ierrors; 1506 break; 1507 } 1508 if (h->type == CONF_NAK) 1509 (cp->RCN_nak)(sp, h, len); 1510 else /* CONF_REJ */ 1511 (cp->RCN_rej)(sp, h, len); 1512 1513 switch (sp->state[cp->protoidx]) { 1514 case STATE_CLOSED: 1515 case STATE_STOPPED: 1516 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1517 break; 1518 case STATE_REQ_SENT: 1519 case STATE_ACK_SENT: 1520 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1521 (cp->scr)(sp); 1522 break; 1523 case STATE_OPENED: 1524 (cp->tld)(sp); 1525 /* fall through */ 1526 case STATE_ACK_RCVD: 1527 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1528 (cp->scr)(sp); 1529 break; 1530 case STATE_CLOSING: 1531 case STATE_STOPPING: 1532 break; 1533 default: 1534 printf("%s: %s illegal %s in state %s\n", 1535 ifp->if_xname, cp->name, 1536 sppp_cp_type_name(h->type), 1537 sppp_state_name(sp->state[cp->protoidx])); 1538 ++ifp->if_ierrors; 1539 } 1540 break; 1541 1542 case TERM_REQ: 1543 switch (sp->state[cp->protoidx]) { 1544 case STATE_ACK_RCVD: 1545 case STATE_ACK_SENT: 1546 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1547 /* fall through */ 1548 case STATE_CLOSED: 1549 case STATE_STOPPED: 1550 case STATE_CLOSING: 1551 case STATE_STOPPING: 1552 case STATE_REQ_SENT: 1553 sta: 1554 /* Send Terminate-Ack packet. */ 1555 if (debug) 1556 log(LOG_DEBUG, "%s: %s send terminate-ack\n", 1557 ifp->if_xname, cp->name); 1558 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1559 break; 1560 case STATE_OPENED: 1561 (cp->tld)(sp); 1562 sp->rst_counter[cp->protoidx] = 0; 1563 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1564 goto sta; 1565 default: 1566 printf("%s: %s illegal %s in state %s\n", 1567 ifp->if_xname, cp->name, 1568 sppp_cp_type_name(h->type), 1569 sppp_state_name(sp->state[cp->protoidx])); 1570 ++ifp->if_ierrors; 1571 } 1572 break; 1573 case TERM_ACK: 1574 switch (sp->state[cp->protoidx]) { 1575 case STATE_CLOSED: 1576 case STATE_STOPPED: 1577 case STATE_REQ_SENT: 1578 case STATE_ACK_SENT: 1579 break; 1580 case STATE_CLOSING: 1581 (cp->tlf)(sp); 1582 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1583 sppp_lcp_check_and_close(sp); 1584 break; 1585 case STATE_STOPPING: 1586 (cp->tlf)(sp); 1587 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1588 sppp_lcp_check_and_close(sp); 1589 break; 1590 case STATE_ACK_RCVD: 1591 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1592 break; 1593 case STATE_OPENED: 1594 (cp->tld)(sp); 1595 (cp->scr)(sp); 1596 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1597 break; 1598 default: 1599 printf("%s: %s illegal %s in state %s\n", 1600 ifp->if_xname, cp->name, 1601 sppp_cp_type_name(h->type), 1602 sppp_state_name(sp->state[cp->protoidx])); 1603 ++ifp->if_ierrors; 1604 } 1605 break; 1606 case CODE_REJ: 1607 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1608 log(LOG_INFO, 1609 "%s: %s: ignoring RXJ (%s) for code ?, " 1610 "danger will robinson\n", 1611 ifp->if_xname, cp->name, 1612 sppp_cp_type_name(h->type)); 1613 switch (sp->state[cp->protoidx]) { 1614 case STATE_CLOSED: 1615 case STATE_STOPPED: 1616 case STATE_REQ_SENT: 1617 case STATE_ACK_SENT: 1618 case STATE_CLOSING: 1619 case STATE_STOPPING: 1620 case STATE_OPENED: 1621 break; 1622 case STATE_ACK_RCVD: 1623 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1624 break; 1625 default: 1626 printf("%s: %s illegal %s in state %s\n", 1627 ifp->if_xname, cp->name, 1628 sppp_cp_type_name(h->type), 1629 sppp_state_name(sp->state[cp->protoidx])); 1630 ++ifp->if_ierrors; 1631 } 1632 break; 1633 case PROTO_REJ: 1634 { 1635 int catastrophic; 1636 const struct cp *upper; 1637 int i; 1638 u_int16_t proto; 1639 1640 catastrophic = 0; 1641 upper = NULL; 1642 proto = p[0] << 8 | p[1]; 1643 for (i = 0; i < IDX_COUNT; i++) { 1644 if (cps[i]->proto == proto) { 1645 upper = cps[i]; 1646 break; 1647 } 1648 } 1649 if (upper == NULL) 1650 catastrophic++; 1651 1652 if (debug) 1653 log(LOG_INFO, 1654 "%s: %s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1655 ifp->if_xname, cp->name, catastrophic ? '-' : '+', 1656 sppp_cp_type_name(h->type), proto, 1657 upper ? upper->name : "unknown", 1658 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1659 1660 /* 1661 * if we got RXJ+ against conf-req, the peer does not implement 1662 * this particular protocol type. terminate the protocol. 1663 */ 1664 if (upper && !catastrophic) { 1665 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1666 upper->Close(sp); 1667 break; 1668 } 1669 } 1670 1671 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1672 switch (sp->state[cp->protoidx]) { 1673 case STATE_CLOSED: 1674 case STATE_STOPPED: 1675 case STATE_REQ_SENT: 1676 case STATE_ACK_SENT: 1677 case STATE_CLOSING: 1678 case STATE_STOPPING: 1679 case STATE_OPENED: 1680 break; 1681 case STATE_ACK_RCVD: 1682 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1683 break; 1684 default: 1685 printf("%s: %s illegal %s in state %s\n", 1686 ifp->if_xname, cp->name, 1687 sppp_cp_type_name(h->type), 1688 sppp_state_name(sp->state[cp->protoidx])); 1689 ++ifp->if_ierrors; 1690 } 1691 break; 1692 } 1693 case DISC_REQ: 1694 if (cp->proto != PPP_LCP) 1695 goto illegal; 1696 /* Discard the packet. */ 1697 break; 1698 case ECHO_REQ: 1699 if (cp->proto != PPP_LCP) 1700 goto illegal; 1701 if (sp->state[cp->protoidx] != STATE_OPENED) { 1702 if (debug) 1703 addlog("%s: lcp echo req but lcp closed\n", 1704 ifp->if_xname); 1705 ++ifp->if_ierrors; 1706 break; 1707 } 1708 if (len < 8) { 1709 if (debug) 1710 addlog("%s: invalid lcp echo request " 1711 "packet length: %d bytes\n", 1712 ifp->if_xname, len); 1713 break; 1714 } 1715 memcpy(&u32, h + 1, sizeof u32); 1716 if (ntohl(u32) == sp->lcp.magic) { 1717 /* Line loopback mode detected. */ 1718 printf("%s: loopback\n", ifp->if_xname); 1719 if_down(ifp); 1720 IF_PURGE(&sp->pp_cpq); 1721 1722 /* Shut down the PPP link. */ 1723 /* XXX */ 1724 lcp.Down(sp); 1725 lcp.Up(sp); 1726 break; 1727 } 1728 u32 = htonl(sp->lcp.magic); 1729 memcpy(h + 1, &u32, sizeof u32); 1730 if (debug) 1731 addlog("%s: got lcp echo req, sending echo rep\n", 1732 ifp->if_xname); 1733 sppp_cp_send(sp, PPP_LCP, ECHO_REPLY, h->ident, len - 4, 1734 h + 1); 1735 break; 1736 case ECHO_REPLY: 1737 if (cp->proto != PPP_LCP) 1738 goto illegal; 1739 if (h->ident != sp->lcp.echoid) { 1740 ++ifp->if_ierrors; 1741 break; 1742 } 1743 if (len < 8) { 1744 if (debug) 1745 addlog("%s: lcp invalid echo reply " 1746 "packet length: %d bytes\n", 1747 ifp->if_xname, len); 1748 break; 1749 } 1750 if (debug) 1751 addlog("%s: lcp got echo rep\n", 1752 ifp->if_xname); 1753 memcpy(&u32, h + 1, sizeof u32); 1754 if (ntohl(u32) != sp->lcp.magic) 1755 sp->pp_alivecnt = 0; 1756 break; 1757 default: 1758 /* Unknown packet type -- send Code-Reject packet. */ 1759 illegal: 1760 if (debug) 1761 addlog("%s: %s send code-rej for 0x%x\n", 1762 ifp->if_xname, cp->name, h->type); 1763 sppp_cp_send(sp, cp->proto, CODE_REJ, 1764 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 1765 ++ifp->if_ierrors; 1766 } 1767 } 1768 1769 1770 /* 1771 * The generic part of all Up/Down/Open/Close/TO event handlers. 1772 * Basically, the state transition handling in the automaton. 1773 */ 1774 static void 1775 sppp_up_event(const struct cp *cp, struct sppp *sp) 1776 { 1777 STDDCL; 1778 1779 if (debug) 1780 log(LOG_DEBUG, "%s: %s up(%s)\n", 1781 ifp->if_xname, cp->name, 1782 sppp_state_name(sp->state[cp->protoidx])); 1783 1784 switch (sp->state[cp->protoidx]) { 1785 case STATE_INITIAL: 1786 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1787 break; 1788 case STATE_STARTING: 1789 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1790 (cp->scr)(sp); 1791 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1792 break; 1793 default: 1794 printf("%s: %s illegal up in state %s\n", 1795 ifp->if_xname, cp->name, 1796 sppp_state_name(sp->state[cp->protoidx])); 1797 } 1798 } 1799 1800 static void 1801 sppp_down_event(const struct cp *cp, struct sppp *sp) 1802 { 1803 STDDCL; 1804 1805 if (debug) 1806 log(LOG_DEBUG, "%s: %s down(%s)\n", 1807 ifp->if_xname, cp->name, 1808 sppp_state_name(sp->state[cp->protoidx])); 1809 1810 switch (sp->state[cp->protoidx]) { 1811 case STATE_CLOSED: 1812 case STATE_CLOSING: 1813 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1814 break; 1815 case STATE_STOPPED: 1816 (cp->tls)(sp); 1817 /* fall through */ 1818 case STATE_STOPPING: 1819 case STATE_REQ_SENT: 1820 case STATE_ACK_RCVD: 1821 case STATE_ACK_SENT: 1822 sppp_cp_change_state(cp, sp, STATE_STARTING); 1823 break; 1824 case STATE_OPENED: 1825 (cp->tld)(sp); 1826 sppp_cp_change_state(cp, sp, STATE_STARTING); 1827 break; 1828 default: 1829 printf("%s: %s illegal down in state %s\n", 1830 ifp->if_xname, cp->name, 1831 sppp_state_name(sp->state[cp->protoidx])); 1832 } 1833 } 1834 1835 1836 static void 1837 sppp_open_event(const struct cp *cp, struct sppp *sp) 1838 { 1839 STDDCL; 1840 1841 if (debug) 1842 log(LOG_DEBUG, "%s: %s open(%s)\n", 1843 ifp->if_xname, cp->name, 1844 sppp_state_name(sp->state[cp->protoidx])); 1845 1846 switch (sp->state[cp->protoidx]) { 1847 case STATE_INITIAL: 1848 sppp_cp_change_state(cp, sp, STATE_STARTING); 1849 (cp->tls)(sp); 1850 break; 1851 case STATE_STARTING: 1852 break; 1853 case STATE_CLOSED: 1854 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1855 (cp->scr)(sp); 1856 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1857 break; 1858 case STATE_STOPPED: 1859 case STATE_STOPPING: 1860 case STATE_REQ_SENT: 1861 case STATE_ACK_RCVD: 1862 case STATE_ACK_SENT: 1863 case STATE_OPENED: 1864 break; 1865 case STATE_CLOSING: 1866 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1867 break; 1868 } 1869 } 1870 1871 1872 static void 1873 sppp_close_event(const struct cp *cp, struct sppp *sp) 1874 { 1875 STDDCL; 1876 1877 if (debug) 1878 log(LOG_DEBUG, "%s: %s close(%s)\n", 1879 ifp->if_xname, cp->name, 1880 sppp_state_name(sp->state[cp->protoidx])); 1881 1882 switch (sp->state[cp->protoidx]) { 1883 case STATE_INITIAL: 1884 case STATE_CLOSED: 1885 case STATE_CLOSING: 1886 break; 1887 case STATE_STARTING: 1888 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1889 (cp->tlf)(sp); 1890 break; 1891 case STATE_STOPPED: 1892 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1893 break; 1894 case STATE_STOPPING: 1895 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1896 break; 1897 case STATE_OPENED: 1898 (cp->tld)(sp); 1899 /* fall through */ 1900 case STATE_REQ_SENT: 1901 case STATE_ACK_RCVD: 1902 case STATE_ACK_SENT: 1903 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 1904 sppp_cp_send(sp, cp->proto, TERM_REQ, 1905 ++sp->pp_seq[cp->protoidx], 0, 0); 1906 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1907 break; 1908 } 1909 } 1910 1911 static void 1912 sppp_to_event(const struct cp *cp, struct sppp *sp) 1913 { 1914 STDDCL; 1915 int s; 1916 1917 s = splnet(); 1918 if (debug) 1919 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 1920 ifp->if_xname, cp->name, 1921 sppp_state_name(sp->state[cp->protoidx]), 1922 sp->rst_counter[cp->protoidx]); 1923 1924 if (--sp->rst_counter[cp->protoidx] < 0) 1925 /* TO- event */ 1926 switch (sp->state[cp->protoidx]) { 1927 case STATE_CLOSING: 1928 (cp->tlf)(sp); 1929 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1930 sppp_lcp_check_and_close(sp); 1931 break; 1932 case STATE_STOPPING: 1933 (cp->tlf)(sp); 1934 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1935 sppp_lcp_check_and_close(sp); 1936 break; 1937 case STATE_REQ_SENT: 1938 case STATE_ACK_RCVD: 1939 case STATE_ACK_SENT: 1940 (cp->tlf)(sp); 1941 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1942 sppp_lcp_check_and_close(sp); 1943 break; 1944 } 1945 else 1946 /* TO+ event */ 1947 switch (sp->state[cp->protoidx]) { 1948 case STATE_CLOSING: 1949 case STATE_STOPPING: 1950 sppp_cp_send(sp, cp->proto, TERM_REQ, 1951 ++sp->pp_seq[cp->protoidx], 0, 0); 1952 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1953 cp->TO, sp); 1954 break; 1955 case STATE_REQ_SENT: 1956 case STATE_ACK_RCVD: 1957 (cp->scr)(sp); 1958 /* sppp_cp_change_state() will restart the timer */ 1959 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1960 break; 1961 case STATE_ACK_SENT: 1962 (cp->scr)(sp); 1963 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1964 cp->TO, sp); 1965 break; 1966 } 1967 1968 splx(s); 1969 } 1970 1971 /* 1972 * Change the state of a control protocol in the state automaton. 1973 * Takes care of starting/stopping the restart timer. 1974 */ 1975 void 1976 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 1977 { 1978 sp->state[cp->protoidx] = newstate; 1979 callout_stop(&sp->ch[cp->protoidx]); 1980 switch (newstate) { 1981 case STATE_INITIAL: 1982 case STATE_STARTING: 1983 case STATE_CLOSED: 1984 case STATE_STOPPED: 1985 case STATE_OPENED: 1986 break; 1987 case STATE_CLOSING: 1988 case STATE_STOPPING: 1989 case STATE_REQ_SENT: 1990 case STATE_ACK_RCVD: 1991 case STATE_ACK_SENT: 1992 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1993 cp->TO, sp); 1994 break; 1995 } 1996 } 1997 1998 /* 1999 *--------------------------------------------------------------------------* 2000 * * 2001 * The LCP implementation. * 2002 * * 2003 *--------------------------------------------------------------------------* 2004 */ 2005 static void 2006 sppp_lcp_init(struct sppp *sp) 2007 { 2008 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 2009 sp->lcp.magic = 0; 2010 sp->state[IDX_LCP] = STATE_INITIAL; 2011 sp->fail_counter[IDX_LCP] = 0; 2012 sp->pp_seq[IDX_LCP] = 0; 2013 sp->pp_rseq[IDX_LCP] = 0; 2014 sp->lcp.protos = 0; 2015 sp->lcp.mru = sp->lcp.their_mru = PP_MTU; 2016 2017 /* 2018 * Initialize counters and timeout values. Note that we don't 2019 * use the 3 seconds suggested in RFC 1661 since we are likely 2020 * running on a fast link. XXX We should probably implement 2021 * the exponential backoff option. Note that these values are 2022 * relevant for all control protocols, not just LCP only. 2023 */ 2024 sp->lcp.timeout = 1 * hz; 2025 sp->lcp.max_terminate = 2; 2026 sp->lcp.max_configure = 10; 2027 sp->lcp.max_failure = 10; 2028 callout_init(&sp->ch[IDX_LCP]); 2029 } 2030 2031 static void 2032 sppp_lcp_up(struct sppp *sp) 2033 { 2034 STDDCL; 2035 2036 /* Initialize activity timestamp: opening a connection is an activity */ 2037 sp->pp_last_receive = sp->pp_last_activity = time_uptime; 2038 2039 /* 2040 * If this interface is passive or dial-on-demand, and we are 2041 * still in Initial state, it means we've got an incoming 2042 * call. Activate the interface. 2043 */ 2044 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2045 if (debug) 2046 log(LOG_DEBUG, 2047 "%s: Up event", ifp->if_xname); 2048 ifp->if_flags |= IFF_RUNNING; 2049 if (sp->state[IDX_LCP] == STATE_INITIAL) { 2050 if (debug) 2051 addlog("(incoming call)\n"); 2052 sp->pp_flags |= PP_CALLIN; 2053 lcp.Open(sp); 2054 } else if (debug) 2055 addlog("\n"); 2056 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 && 2057 (sp->state[IDX_LCP] == STATE_INITIAL)) { 2058 ifp->if_flags |= IFF_RUNNING; 2059 lcp.Open(sp); 2060 } 2061 2062 sppp_up_event(&lcp, sp); 2063 } 2064 2065 static void 2066 sppp_lcp_down(struct sppp *sp) 2067 { 2068 STDDCL; 2069 2070 sppp_down_event(&lcp, sp); 2071 2072 /* 2073 * If this is neither a dial-on-demand nor a passive 2074 * interface, simulate an ``ifconfig down'' action, so the 2075 * administrator can force a redial by another ``ifconfig 2076 * up''. XXX For leased line operation, should we immediately 2077 * try to reopen the connection here? 2078 */ 2079 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2080 if (debug) 2081 log(LOG_INFO, 2082 "%s: Down event (carrier loss), taking interface down.\n", 2083 ifp->if_xname); 2084 if_down(ifp); 2085 } else { 2086 if (debug) 2087 log(LOG_DEBUG, 2088 "%s: Down event (carrier loss)\n", 2089 ifp->if_xname); 2090 } 2091 sp->pp_flags &= ~PP_CALLIN; 2092 if (sp->state[IDX_LCP] != STATE_INITIAL) 2093 lcp.Close(sp); 2094 ifp->if_flags &= ~IFF_RUNNING; 2095 } 2096 2097 static void 2098 sppp_lcp_open(struct sppp *sp) 2099 { 2100 /* 2101 * If we are authenticator, negotiate LCP_AUTH 2102 */ 2103 if (sp->hisauth.proto != 0) 2104 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2105 else 2106 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2107 sp->pp_flags &= ~PP_NEEDAUTH; 2108 sppp_open_event(&lcp, sp); 2109 } 2110 2111 static void 2112 sppp_lcp_close(struct sppp *sp) 2113 { 2114 sppp_close_event(&lcp, sp); 2115 } 2116 2117 static void 2118 sppp_lcp_TO(void *cookie) 2119 { 2120 sppp_to_event(&lcp, (struct sppp *)cookie); 2121 } 2122 2123 /* 2124 * Analyze a configure request. Return true if it was agreeable, and 2125 * caused action sca, false if it has been rejected or nak'ed, and 2126 * caused action scn. (The return value is used to make the state 2127 * transition decision in the state automaton.) 2128 */ 2129 static int 2130 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2131 { 2132 STDDCL; 2133 u_char *buf, *r, *p; 2134 int origlen, rlen; 2135 u_int32_t nmagic; 2136 u_short authproto; 2137 2138 len -= 4; 2139 origlen = len; 2140 buf = r = malloc (len, M_TEMP, M_NOWAIT); 2141 if (! buf) 2142 return (0); 2143 2144 if (debug) 2145 log(LOG_DEBUG, "%s: lcp parse opts:", 2146 ifp->if_xname); 2147 2148 /* pass 1: check for things that need to be rejected */ 2149 p = (void *)(h + 1); 2150 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2151 if (debug) 2152 addlog(" %s", sppp_lcp_opt_name(*p)); 2153 switch (*p) { 2154 case LCP_OPT_MAGIC: 2155 /* Magic number. */ 2156 /* fall through, both are same length */ 2157 case LCP_OPT_ASYNC_MAP: 2158 /* Async control character map. */ 2159 if (len >= 6 || p[1] == 6) 2160 continue; 2161 if (debug) 2162 addlog(" [invalid]"); 2163 break; 2164 case LCP_OPT_MRU: 2165 /* Maximum receive unit. */ 2166 if (len >= 4 && p[1] == 4) 2167 continue; 2168 if (debug) 2169 addlog(" [invalid]"); 2170 break; 2171 case LCP_OPT_AUTH_PROTO: 2172 if (len < 4) { 2173 if (debug) 2174 addlog(" [invalid]"); 2175 break; 2176 } 2177 authproto = (p[2] << 8) + p[3]; 2178 if (authproto == PPP_CHAP && p[1] != 5) { 2179 if (debug) 2180 addlog(" [invalid chap len]"); 2181 break; 2182 } 2183 if (sp->myauth.proto == 0) { 2184 /* we are not configured to do auth */ 2185 if (debug) 2186 addlog(" [not configured]"); 2187 break; 2188 } 2189 /* 2190 * Remote want us to authenticate, remember this, 2191 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2192 * up. 2193 */ 2194 sp->pp_flags |= PP_NEEDAUTH; 2195 continue; 2196 default: 2197 /* Others not supported. */ 2198 if (debug) 2199 addlog(" [rej]"); 2200 break; 2201 } 2202 /* Add the option to rejected list. */ 2203 bcopy (p, r, p[1]); 2204 r += p[1]; 2205 rlen += p[1]; 2206 } 2207 if (rlen) { 2208 if (debug) 2209 addlog(" send conf-rej\n"); 2210 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2211 goto end; 2212 } else if (debug) 2213 addlog("\n"); 2214 2215 /* 2216 * pass 2: check for option values that are unacceptable and 2217 * thus require to be nak'ed. 2218 */ 2219 if (debug) 2220 log(LOG_DEBUG, "%s: lcp parse opt values: ", 2221 ifp->if_xname); 2222 2223 p = (void *)(h + 1); 2224 len = origlen; 2225 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2226 if (debug) 2227 addlog(" %s", sppp_lcp_opt_name(*p)); 2228 switch (*p) { 2229 case LCP_OPT_MAGIC: 2230 /* Magic number -- extract. */ 2231 nmagic = (u_int32_t)p[2] << 24 | 2232 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2233 if (nmagic != sp->lcp.magic) { 2234 if (debug) 2235 addlog(" 0x%x", nmagic); 2236 continue; 2237 } 2238 /* 2239 * Local and remote magics equal -- loopback? 2240 */ 2241 if (sp->pp_loopcnt >= LOOPALIVECNT*5) { 2242 printf ("%s: loopback\n", 2243 ifp->if_xname); 2244 sp->pp_loopcnt = 0; 2245 if (ifp->if_flags & IFF_UP) { 2246 if_down(ifp); 2247 IF_PURGE(&sp->pp_cpq); 2248 /* XXX ? */ 2249 lcp.Down(sp); 2250 lcp.Up(sp); 2251 } 2252 } else if (debug) 2253 addlog(" [glitch]"); 2254 ++sp->pp_loopcnt; 2255 /* 2256 * We negate our magic here, and NAK it. If 2257 * we see it later in an NAK packet, we 2258 * suggest a new one. 2259 */ 2260 nmagic = ~sp->lcp.magic; 2261 /* Gonna NAK it. */ 2262 p[2] = nmagic >> 24; 2263 p[3] = nmagic >> 16; 2264 p[4] = nmagic >> 8; 2265 p[5] = nmagic; 2266 break; 2267 2268 case LCP_OPT_ASYNC_MAP: 2269 /* 2270 * Async control character map -- just ignore it. 2271 * 2272 * Quote from RFC 1662, chapter 6: 2273 * To enable this functionality, synchronous PPP 2274 * implementations MUST always respond to the 2275 * Async-Control-Character-Map Configuration 2276 * Option with the LCP Configure-Ack. However, 2277 * acceptance of the Configuration Option does 2278 * not imply that the synchronous implementation 2279 * will do any ACCM mapping. Instead, all such 2280 * octet mapping will be performed by the 2281 * asynchronous-to-synchronous converter. 2282 */ 2283 continue; 2284 2285 case LCP_OPT_MRU: 2286 /* 2287 * Maximum receive unit. Always agreeable, 2288 * but ignored by now. 2289 */ 2290 sp->lcp.their_mru = p[2] * 256 + p[3]; 2291 if (debug) 2292 addlog(" %ld", sp->lcp.their_mru); 2293 continue; 2294 2295 case LCP_OPT_AUTH_PROTO: 2296 authproto = (p[2] << 8) + p[3]; 2297 if (sp->myauth.proto != authproto) { 2298 /* not agreed, nak */ 2299 if (debug) 2300 addlog(" [mine %s != his %s]", 2301 sppp_proto_name(sp->myauth.proto), 2302 sppp_proto_name(authproto)); 2303 p[2] = sp->myauth.proto >> 8; 2304 p[3] = sp->myauth.proto; 2305 break; 2306 } 2307 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2308 if (debug) 2309 addlog(" [chap not MD5]"); 2310 p[4] = CHAP_MD5; 2311 break; 2312 } 2313 continue; 2314 } 2315 /* Add the option to nak'ed list. */ 2316 bcopy (p, r, p[1]); 2317 r += p[1]; 2318 rlen += p[1]; 2319 } 2320 if (rlen) { 2321 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2322 if (debug) 2323 addlog(" max_failure (%d) exceeded, " 2324 "send conf-rej\n", 2325 sp->lcp.max_failure); 2326 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2327 } else { 2328 if (debug) 2329 addlog(" send conf-nak\n"); 2330 sppp_cp_send(sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2331 } 2332 goto end; 2333 } else { 2334 if (debug) 2335 addlog(" send conf-ack\n"); 2336 sp->fail_counter[IDX_LCP] = 0; 2337 sp->pp_loopcnt = 0; 2338 sppp_cp_send(sp, PPP_LCP, CONF_ACK, h->ident, origlen, h + 1); 2339 } 2340 2341 end: 2342 free(buf, M_TEMP); 2343 return (rlen == 0); 2344 } 2345 2346 /* 2347 * Analyze the LCP Configure-Reject option list, and adjust our 2348 * negotiation. 2349 */ 2350 static void 2351 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2352 { 2353 STDDCL; 2354 u_char *buf, *p; 2355 2356 len -= 4; 2357 buf = malloc (len, M_TEMP, M_NOWAIT); 2358 if (!buf) 2359 return; 2360 2361 if (debug) 2362 log(LOG_DEBUG, "%s: lcp rej opts:", 2363 ifp->if_xname); 2364 2365 p = (void *)(h + 1); 2366 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2367 if (debug) 2368 addlog(" %s", sppp_lcp_opt_name(*p)); 2369 switch (*p) { 2370 case LCP_OPT_MAGIC: 2371 /* Magic number -- can't use it, use 0 */ 2372 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2373 sp->lcp.magic = 0; 2374 break; 2375 case LCP_OPT_MRU: 2376 /* 2377 * Should not be rejected anyway, since we only 2378 * negotiate a MRU if explicitly requested by 2379 * peer. 2380 */ 2381 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2382 break; 2383 case LCP_OPT_AUTH_PROTO: 2384 /* 2385 * Peer doesn't want to authenticate himself, 2386 * deny unless this is a dialout call, and 2387 * SPPP_AUTHFLAG_NOCALLOUT is set. 2388 */ 2389 if ((sp->pp_flags & PP_CALLIN) == 0 && 2390 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2391 if (debug) 2392 addlog(" [don't insist on auth " 2393 "for callout]"); 2394 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2395 break; 2396 } 2397 if (debug) 2398 addlog("[access denied]\n"); 2399 lcp.Close(sp); 2400 break; 2401 } 2402 } 2403 if (debug) 2404 addlog("\n"); 2405 free(buf, M_TEMP); 2406 return; 2407 } 2408 2409 /* 2410 * Analyze the LCP Configure-NAK option list, and adjust our 2411 * negotiation. 2412 */ 2413 static void 2414 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2415 { 2416 STDDCL; 2417 u_char *buf, *p; 2418 u_int32_t magic; 2419 2420 len -= 4; 2421 buf = malloc (len, M_TEMP, M_NOWAIT); 2422 if (!buf) 2423 return; 2424 2425 if (debug) 2426 log(LOG_DEBUG, "%s: lcp nak opts:", 2427 ifp->if_xname); 2428 2429 p = (void *)(h + 1); 2430 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2431 if (debug) 2432 addlog(" %s", sppp_lcp_opt_name(*p)); 2433 switch (*p) { 2434 case LCP_OPT_MAGIC: 2435 /* Magic number -- renegotiate */ 2436 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2437 len >= 6 && p[1] == 6) { 2438 magic = (u_int32_t)p[2] << 24 | 2439 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2440 /* 2441 * If the remote magic is our negated one, 2442 * this looks like a loopback problem. 2443 * Suggest a new magic to make sure. 2444 */ 2445 if (magic == ~sp->lcp.magic) { 2446 if (debug) 2447 addlog(" magic glitch"); 2448 sp->lcp.magic = arc4random(); 2449 } else { 2450 sp->lcp.magic = magic; 2451 if (debug) 2452 addlog(" %d", magic); 2453 } 2454 } 2455 break; 2456 case LCP_OPT_MRU: 2457 /* 2458 * Peer wants to advise us to negotiate an MRU. 2459 * Agree on it if it's reasonable, or use 2460 * default otherwise. 2461 */ 2462 if (len >= 4 && p[1] == 4) { 2463 u_int mru = p[2] * 256 + p[3]; 2464 if (debug) 2465 addlog(" %d", mru); 2466 if (mru < PP_MTU || mru > PP_MAX_MRU) 2467 mru = PP_MTU; 2468 sp->lcp.mru = mru; 2469 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2470 } 2471 break; 2472 case LCP_OPT_AUTH_PROTO: 2473 /* 2474 * Peer doesn't like our authentication method, 2475 * deny. 2476 */ 2477 if (debug) 2478 addlog("[access denied]\n"); 2479 lcp.Close(sp); 2480 break; 2481 } 2482 } 2483 if (debug) 2484 addlog("\n"); 2485 free(buf, M_TEMP); 2486 return; 2487 } 2488 2489 static void 2490 sppp_lcp_tlu(struct sppp *sp) 2491 { 2492 STDDCL; 2493 int i; 2494 u_int32_t mask; 2495 2496 /* XXX ? */ 2497 if (! (ifp->if_flags & IFF_UP) && 2498 (ifp->if_flags & IFF_RUNNING)) { 2499 /* Coming out of loopback mode. */ 2500 if_up(ifp); 2501 } 2502 2503 for (i = 0; i < IDX_COUNT; i++) 2504 if ((cps[i])->flags & CP_QUAL) 2505 (cps[i])->Open(sp); 2506 2507 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2508 (sp->pp_flags & PP_NEEDAUTH) != 0) 2509 sp->pp_phase = SPPP_PHASE_AUTHENTICATE; 2510 else 2511 sp->pp_phase = SPPP_PHASE_NETWORK; 2512 2513 if (debug) 2514 { 2515 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 2516 sppp_phase_name(sp->pp_phase)); 2517 } 2518 2519 /* 2520 * Open all authentication protocols. This is even required 2521 * if we already proceeded to network phase, since it might be 2522 * that remote wants us to authenticate, so we might have to 2523 * send a PAP request. Undesired authentication protocols 2524 * don't do anything when they get an Open event. 2525 */ 2526 for (i = 0; i < IDX_COUNT; i++) 2527 if ((cps[i])->flags & CP_AUTH) 2528 (cps[i])->Open(sp); 2529 2530 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2531 /* Notify all NCPs. */ 2532 for (i = 0; i < IDX_COUNT; i++) 2533 if ((cps[i])->flags & CP_NCP) 2534 (cps[i])->Open(sp); 2535 } 2536 2537 /* Send Up events to all started protos. */ 2538 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2539 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) 2540 (cps[i])->Up(sp); 2541 2542 /* notify low-level driver of state change */ 2543 if (sp->pp_chg) 2544 sp->pp_chg(sp, (int)sp->pp_phase); 2545 2546 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2547 /* if no NCP is starting, close down */ 2548 sppp_lcp_check_and_close(sp); 2549 } 2550 2551 static void 2552 sppp_lcp_tld(struct sppp *sp) 2553 { 2554 STDDCL; 2555 int i; 2556 u_int32_t mask; 2557 2558 sp->pp_phase = SPPP_PHASE_TERMINATE; 2559 2560 if (debug) 2561 { 2562 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 2563 sppp_phase_name(sp->pp_phase)); 2564 } 2565 2566 /* 2567 * Take upper layers down. We send the Down event first and 2568 * the Close second to prevent the upper layers from sending 2569 * ``a flurry of terminate-request packets'', as the RFC 2570 * describes it. 2571 */ 2572 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2573 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2574 (cps[i])->Down(sp); 2575 (cps[i])->Close(sp); 2576 } 2577 } 2578 2579 static void 2580 sppp_lcp_tls(struct sppp *sp) 2581 { 2582 STDDCL; 2583 2584 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2585 printf("%s: authentication failed %d times, not retrying again\n", 2586 sp->pp_if.if_xname, sp->pp_auth_failures); 2587 if_down(&sp->pp_if); 2588 return; 2589 } 2590 2591 sp->pp_phase = SPPP_PHASE_ESTABLISH; 2592 2593 if (debug) 2594 { 2595 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 2596 sppp_phase_name(sp->pp_phase)); 2597 } 2598 2599 /* Notify lower layer if desired. */ 2600 if (sp->pp_tls) 2601 (sp->pp_tls)(sp); 2602 } 2603 2604 static void 2605 sppp_lcp_tlf(struct sppp *sp) 2606 { 2607 STDDCL; 2608 2609 sp->pp_phase = SPPP_PHASE_DEAD; 2610 2611 if (debug) 2612 { 2613 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 2614 sppp_phase_name(sp->pp_phase)); 2615 } 2616 2617 /* Notify lower layer if desired. */ 2618 if (sp->pp_tlf) 2619 (sp->pp_tlf)(sp); 2620 } 2621 2622 static void 2623 sppp_lcp_scr(struct sppp *sp) 2624 { 2625 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2626 int i = 0; 2627 u_short authproto; 2628 2629 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2630 if (! sp->lcp.magic) 2631 sp->lcp.magic = arc4random(); 2632 opt[i++] = LCP_OPT_MAGIC; 2633 opt[i++] = 6; 2634 opt[i++] = sp->lcp.magic >> 24; 2635 opt[i++] = sp->lcp.magic >> 16; 2636 opt[i++] = sp->lcp.magic >> 8; 2637 opt[i++] = sp->lcp.magic; 2638 } 2639 2640 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2641 opt[i++] = LCP_OPT_MRU; 2642 opt[i++] = 4; 2643 opt[i++] = sp->lcp.mru >> 8; 2644 opt[i++] = sp->lcp.mru; 2645 } 2646 2647 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2648 authproto = sp->hisauth.proto; 2649 opt[i++] = LCP_OPT_AUTH_PROTO; 2650 opt[i++] = authproto == PPP_CHAP? 5: 4; 2651 opt[i++] = authproto >> 8; 2652 opt[i++] = authproto; 2653 if (authproto == PPP_CHAP) 2654 opt[i++] = CHAP_MD5; 2655 } 2656 2657 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2658 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2659 } 2660 2661 /* 2662 * Check the open NCPs, return true if at least one NCP is open. 2663 */ 2664 static int 2665 sppp_ncp_check(struct sppp *sp) 2666 { 2667 int i, mask; 2668 2669 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2670 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2671 return 1; 2672 return 0; 2673 } 2674 2675 /* 2676 * Re-check the open NCPs and see if we should terminate the link. 2677 * Called by the NCPs during their tlf action handling. 2678 */ 2679 static void 2680 sppp_lcp_check_and_close(struct sppp *sp) 2681 { 2682 2683 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2684 /* don't bother, we are already going down */ 2685 return; 2686 2687 if (sppp_ncp_check(sp)) 2688 return; 2689 2690 lcp.Close(sp); 2691 } 2692 2693 2694 /* 2695 *--------------------------------------------------------------------------* 2696 * * 2697 * The IPCP implementation. * 2698 * * 2699 *--------------------------------------------------------------------------* 2700 */ 2701 2702 static void 2703 sppp_ipcp_init(struct sppp *sp) 2704 { 2705 sp->ipcp.opts = 0; 2706 sp->ipcp.flags = 0; 2707 sp->state[IDX_IPCP] = STATE_INITIAL; 2708 sp->fail_counter[IDX_IPCP] = 0; 2709 sp->pp_seq[IDX_IPCP] = 0; 2710 sp->pp_rseq[IDX_IPCP] = 0; 2711 callout_init(&sp->ch[IDX_IPCP]); 2712 } 2713 2714 static void 2715 sppp_ipcp_up(struct sppp *sp) 2716 { 2717 sppp_up_event(&ipcp, sp); 2718 } 2719 2720 static void 2721 sppp_ipcp_down(struct sppp *sp) 2722 { 2723 sppp_down_event(&ipcp, sp); 2724 } 2725 2726 static void 2727 sppp_ipcp_open(struct sppp *sp) 2728 { 2729 STDDCL; 2730 u_int32_t myaddr, hisaddr; 2731 2732 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 2733 sp->ipcp.req_myaddr = 0; 2734 sp->ipcp.req_hisaddr = 0; 2735 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 2736 2737 #ifdef INET 2738 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 2739 #else 2740 myaddr = hisaddr = 0; 2741 #endif 2742 /* 2743 * If we don't have his address, this probably means our 2744 * interface doesn't want to talk IP at all. (This could 2745 * be the case if somebody wants to speak only IPX, for 2746 * example.) Don't open IPCP in this case. 2747 */ 2748 if (hisaddr == 0) { 2749 /* XXX this message should go away */ 2750 if (debug) 2751 log(LOG_DEBUG, "%s: ipcp_open(): no IP interface\n", 2752 ifp->if_xname); 2753 return; 2754 } 2755 2756 if (myaddr == 0) { 2757 /* 2758 * I don't have an assigned address, so i need to 2759 * negotiate my address. 2760 */ 2761 sp->ipcp.flags |= IPCP_MYADDR_DYN; 2762 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 2763 } 2764 if (hisaddr == 1) { 2765 /* 2766 * XXX - remove this hack! 2767 * remote has no valid address, we need to get one assigned. 2768 */ 2769 sp->ipcp.flags |= IPCP_HISADDR_DYN; 2770 } 2771 sppp_open_event(&ipcp, sp); 2772 } 2773 2774 static void 2775 sppp_ipcp_close(struct sppp *sp) 2776 { 2777 STDDCL; 2778 2779 sppp_close_event(&ipcp, sp); 2780 #ifdef INET 2781 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 2782 /* 2783 * Some address was dynamic, clear it again. 2784 */ 2785 sppp_clear_ip_addrs(sp); 2786 #endif 2787 2788 if (sp->pp_saved_mtu > 0) { 2789 ifp->if_mtu = sp->pp_saved_mtu; 2790 sp->pp_saved_mtu = 0; 2791 if (debug) 2792 log(LOG_DEBUG, 2793 "%s: resetting MTU to %" PRIu64 " bytes\n", 2794 ifp->if_xname, ifp->if_mtu); 2795 } 2796 } 2797 2798 static void 2799 sppp_ipcp_TO(void *cookie) 2800 { 2801 sppp_to_event(&ipcp, (struct sppp *)cookie); 2802 } 2803 2804 /* 2805 * Analyze a configure request. Return true if it was agreeable, and 2806 * caused action sca, false if it has been rejected or nak'ed, and 2807 * caused action scn. (The return value is used to make the state 2808 * transition decision in the state automaton.) 2809 */ 2810 static int 2811 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2812 { 2813 u_char *buf, *r, *p; 2814 struct ifnet *ifp = &sp->pp_if; 2815 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 2816 u_int32_t hisaddr, desiredaddr; 2817 2818 len -= 4; 2819 origlen = len; 2820 /* 2821 * Make sure to allocate a buf that can at least hold a 2822 * conf-nak with an `address' option. We might need it below. 2823 */ 2824 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 2825 if (! buf) 2826 return (0); 2827 2828 /* pass 1: see if we can recognize them */ 2829 if (debug) 2830 log(LOG_DEBUG, "%s: ipcp parse opts:", 2831 ifp->if_xname); 2832 p = (void *)(h + 1); 2833 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2834 if (debug) 2835 addlog(" %s", sppp_ipcp_opt_name(*p)); 2836 switch (*p) { 2837 #ifdef notyet 2838 case IPCP_OPT_COMPRESSION: 2839 if (len >= 6 && p[1] >= 6) { 2840 /* correctly formed compress option */ 2841 continue; 2842 } 2843 if (debug) 2844 addlog(" [invalid]"); 2845 break; 2846 #endif 2847 case IPCP_OPT_ADDRESS: 2848 if (len >= 6 && p[1] == 6) { 2849 /* correctly formed address option */ 2850 continue; 2851 } 2852 if (debug) 2853 addlog(" [invalid]"); 2854 break; 2855 default: 2856 /* Others not supported. */ 2857 if (debug) 2858 addlog(" [rej]"); 2859 break; 2860 } 2861 /* Add the option to rejected list. */ 2862 bcopy (p, r, p[1]); 2863 r += p[1]; 2864 rlen += p[1]; 2865 } 2866 if (rlen) { 2867 if (debug) 2868 addlog(" send conf-rej\n"); 2869 sppp_cp_send(sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 2870 goto end; 2871 } else if (debug) 2872 addlog("\n"); 2873 2874 /* pass 2: parse option values */ 2875 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 2876 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 2877 else 2878 #ifdef INET 2879 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 2880 #else 2881 hisaddr = 0; 2882 #endif 2883 if (debug) 2884 log(LOG_DEBUG, "%s: ipcp parse opt values: ", 2885 ifp->if_xname); 2886 p = (void *)(h + 1); 2887 len = origlen; 2888 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2889 if (debug) 2890 addlog(" %s", sppp_ipcp_opt_name(*p)); 2891 switch (*p) { 2892 #ifdef notyet 2893 case IPCP_OPT_COMPRESSION: 2894 continue; 2895 #endif 2896 case IPCP_OPT_ADDRESS: 2897 desiredaddr = p[2] << 24 | p[3] << 16 | 2898 p[4] << 8 | p[5]; 2899 if (desiredaddr == hisaddr || 2900 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 2901 /* 2902 * Peer's address is same as our value, 2903 * this is agreeable. Gonna conf-ack 2904 * it. 2905 */ 2906 if (debug) 2907 addlog(" %s [ack]", 2908 sppp_dotted_quad(hisaddr)); 2909 /* record that we've seen it already */ 2910 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 2911 sp->ipcp.req_hisaddr = desiredaddr; 2912 hisaddr = desiredaddr; 2913 continue; 2914 } 2915 /* 2916 * The address wasn't agreeable. This is either 2917 * he sent us 0.0.0.0, asking to assign him an 2918 * address, or he send us another address not 2919 * matching our value. Either case, we gonna 2920 * conf-nak it with our value. 2921 */ 2922 if (debug) { 2923 if (desiredaddr == 0) 2924 addlog(" [addr requested]"); 2925 else 2926 addlog(" %s [not agreed]", 2927 sppp_dotted_quad(desiredaddr)); 2928 } 2929 2930 p[2] = hisaddr >> 24; 2931 p[3] = hisaddr >> 16; 2932 p[4] = hisaddr >> 8; 2933 p[5] = hisaddr; 2934 break; 2935 } 2936 /* Add the option to nak'ed list. */ 2937 bcopy (p, r, p[1]); 2938 r += p[1]; 2939 rlen += p[1]; 2940 } 2941 2942 /* 2943 * If we are about to conf-ack the request, but haven't seen 2944 * his address so far, gonna conf-nak it instead, with the 2945 * `address' option present and our idea of his address being 2946 * filled in there, to request negotiation of both addresses. 2947 * 2948 * XXX This can result in an endless req - nak loop if peer 2949 * doesn't want to send us his address. Q: What should we do 2950 * about it? XXX A: implement the max-failure counter. 2951 */ 2952 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 2953 buf[0] = IPCP_OPT_ADDRESS; 2954 buf[1] = 6; 2955 buf[2] = hisaddr >> 24; 2956 buf[3] = hisaddr >> 16; 2957 buf[4] = hisaddr >> 8; 2958 buf[5] = hisaddr; 2959 rlen = 6; 2960 if (debug) 2961 addlog(" still need hisaddr"); 2962 } 2963 2964 if (rlen) { 2965 if (debug) 2966 addlog(" send conf-nak\n"); 2967 sppp_cp_send(sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 2968 } else { 2969 if (debug) 2970 addlog(" send conf-ack\n"); 2971 sppp_cp_send(sp, PPP_IPCP, CONF_ACK, h->ident, origlen, h + 1); 2972 } 2973 2974 end: 2975 free(buf, M_TEMP); 2976 return (rlen == 0); 2977 } 2978 2979 /* 2980 * Analyze the IPCP Configure-Reject option list, and adjust our 2981 * negotiation. 2982 */ 2983 static void 2984 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2985 { 2986 u_char *buf, *p; 2987 struct ifnet *ifp = &sp->pp_if; 2988 int debug = ifp->if_flags & IFF_DEBUG; 2989 2990 len -= 4; 2991 buf = malloc (len, M_TEMP, M_NOWAIT); 2992 if (!buf) 2993 return; 2994 2995 if (debug) 2996 log(LOG_DEBUG, "%s: ipcp rej opts:", 2997 ifp->if_xname); 2998 2999 p = (void *)(h + 1); 3000 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3001 if (debug) 3002 addlog(" %s", sppp_ipcp_opt_name(*p)); 3003 switch (*p) { 3004 case IPCP_OPT_ADDRESS: 3005 /* 3006 * Peer doesn't grok address option. This is 3007 * bad. XXX Should we better give up here? 3008 */ 3009 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 3010 break; 3011 #ifdef notyet 3012 case IPCP_OPT_COMPRESS: 3013 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 3014 break; 3015 #endif 3016 } 3017 } 3018 if (debug) 3019 addlog("\n"); 3020 free(buf, M_TEMP); 3021 return; 3022 } 3023 3024 /* 3025 * Analyze the IPCP Configure-NAK option list, and adjust our 3026 * negotiation. 3027 */ 3028 static void 3029 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3030 { 3031 u_char *p; 3032 struct ifnet *ifp = &sp->pp_if; 3033 int debug = ifp->if_flags & IFF_DEBUG; 3034 u_int32_t wantaddr; 3035 3036 len -= 4; 3037 3038 if (debug) 3039 log(LOG_DEBUG, "%s: ipcp nak opts:", 3040 ifp->if_xname); 3041 3042 p = (void *)(h + 1); 3043 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3044 if (debug) 3045 addlog(" %s", sppp_ipcp_opt_name(*p)); 3046 switch (*p) { 3047 case IPCP_OPT_ADDRESS: 3048 /* 3049 * Peer doesn't like our local IP address. See 3050 * if we can do something for him. We'll drop 3051 * him our address then. 3052 */ 3053 if (len >= 6 && p[1] == 6) { 3054 wantaddr = p[2] << 24 | p[3] << 16 | 3055 p[4] << 8 | p[5]; 3056 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3057 if (debug) 3058 addlog(" [wantaddr %s]", 3059 sppp_dotted_quad(wantaddr)); 3060 /* 3061 * When doing dynamic address assignment, 3062 * we accept his offer. Otherwise, we 3063 * ignore it and thus continue to negotiate 3064 * our already existing value. 3065 */ 3066 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3067 if (debug) 3068 addlog(" [agree]"); 3069 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3070 sp->ipcp.req_myaddr = wantaddr; 3071 } 3072 } 3073 break; 3074 3075 case IPCP_OPT_PRIMDNS: 3076 if (len >= 6 && p[1] == 6) { 3077 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3078 p[4] << 8 | p[5]; 3079 } 3080 break; 3081 3082 case IPCP_OPT_SECDNS: 3083 if (len >= 6 && p[1] == 6) { 3084 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3085 p[4] << 8 | p[5]; 3086 } 3087 break; 3088 #ifdef notyet 3089 case IPCP_OPT_COMPRESS: 3090 /* 3091 * Peer wants different compression parameters. 3092 */ 3093 break; 3094 #endif 3095 } 3096 } 3097 if (debug) 3098 addlog("\n"); 3099 return; 3100 } 3101 3102 static void 3103 sppp_ipcp_tlu(struct sppp *sp) 3104 { 3105 #ifdef INET 3106 /* we are up. Set addresses and notify anyone interested */ 3107 STDDCL; 3108 u_int32_t myaddr, hisaddr; 3109 3110 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3111 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 3112 myaddr = sp->ipcp.req_myaddr; 3113 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 3114 hisaddr = sp->ipcp.req_hisaddr; 3115 sppp_set_ip_addrs(sp, myaddr, hisaddr); 3116 3117 if (ifp->if_mtu > sp->lcp.their_mru) { 3118 sp->pp_saved_mtu = ifp->if_mtu; 3119 ifp->if_mtu = sp->lcp.their_mru; 3120 if (debug) 3121 log(LOG_DEBUG, 3122 "%s: setting MTU to %" PRIu64 " bytes\n", 3123 ifp->if_xname, ifp->if_mtu); 3124 } 3125 3126 if (sp->pp_con) 3127 sp->pp_con(sp); 3128 #endif 3129 } 3130 3131 static void 3132 sppp_ipcp_tld(struct sppp *sp) 3133 { 3134 } 3135 3136 static void 3137 sppp_ipcp_tls(struct sppp *sp) 3138 { 3139 /* indicate to LCP that it must stay alive */ 3140 sp->lcp.protos |= (1 << IDX_IPCP); 3141 } 3142 3143 static void 3144 sppp_ipcp_tlf(struct sppp *sp) 3145 { 3146 /* we no longer need LCP */ 3147 sp->lcp.protos &= ~(1 << IDX_IPCP); 3148 } 3149 3150 static void 3151 sppp_ipcp_scr(struct sppp *sp) 3152 { 3153 char opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3154 #ifdef INET 3155 u_int32_t ouraddr; 3156 #endif 3157 int i = 0; 3158 3159 #ifdef notyet 3160 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3161 opt[i++] = IPCP_OPT_COMPRESSION; 3162 opt[i++] = 6; 3163 opt[i++] = 0; /* VJ header compression */ 3164 opt[i++] = 0x2d; /* VJ header compression */ 3165 opt[i++] = max_slot_id; 3166 opt[i++] = comp_slot_id; 3167 } 3168 #endif 3169 3170 #ifdef INET 3171 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3172 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3173 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3174 else 3175 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3176 opt[i++] = IPCP_OPT_ADDRESS; 3177 opt[i++] = 6; 3178 opt[i++] = ouraddr >> 24; 3179 opt[i++] = ouraddr >> 16; 3180 opt[i++] = ouraddr >> 8; 3181 opt[i++] = ouraddr; 3182 } 3183 #endif 3184 3185 if (sp->query_dns & 1) { 3186 opt[i++] = IPCP_OPT_PRIMDNS; 3187 opt[i++] = 6; 3188 opt[i++] = sp->dns_addrs[0] >> 24; 3189 opt[i++] = sp->dns_addrs[0] >> 16; 3190 opt[i++] = sp->dns_addrs[0] >> 8; 3191 opt[i++] = sp->dns_addrs[0]; 3192 } 3193 if (sp->query_dns & 2) { 3194 opt[i++] = IPCP_OPT_SECDNS; 3195 opt[i++] = 6; 3196 opt[i++] = sp->dns_addrs[1] >> 24; 3197 opt[i++] = sp->dns_addrs[1] >> 16; 3198 opt[i++] = sp->dns_addrs[1] >> 8; 3199 opt[i++] = sp->dns_addrs[1]; 3200 } 3201 3202 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3203 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3204 } 3205 3206 3207 /* 3208 *--------------------------------------------------------------------------* 3209 * * 3210 * The IPv6CP implementation. * 3211 * * 3212 *--------------------------------------------------------------------------* 3213 */ 3214 3215 #ifdef INET6 3216 static void 3217 sppp_ipv6cp_init(struct sppp *sp) 3218 { 3219 sp->ipv6cp.opts = 0; 3220 sp->ipv6cp.flags = 0; 3221 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3222 sp->fail_counter[IDX_IPV6CP] = 0; 3223 sp->pp_seq[IDX_IPV6CP] = 0; 3224 sp->pp_rseq[IDX_IPV6CP] = 0; 3225 callout_init(&sp->ch[IDX_IPV6CP]); 3226 } 3227 3228 static void 3229 sppp_ipv6cp_up(struct sppp *sp) 3230 { 3231 sppp_up_event(&ipv6cp, sp); 3232 } 3233 3234 static void 3235 sppp_ipv6cp_down(struct sppp *sp) 3236 { 3237 sppp_down_event(&ipv6cp, sp); 3238 } 3239 3240 static void 3241 sppp_ipv6cp_open(struct sppp *sp) 3242 { 3243 STDDCL; 3244 struct in6_addr myaddr, hisaddr; 3245 3246 #ifdef IPV6CP_MYIFID_DYN 3247 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3248 #else 3249 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3250 #endif 3251 3252 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3253 /* 3254 * If we don't have our address, this probably means our 3255 * interface doesn't want to talk IPv6 at all. (This could 3256 * be the case if somebody wants to speak only IPX, for 3257 * example.) Don't open IPv6CP in this case. 3258 */ 3259 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3260 /* XXX this message should go away */ 3261 if (debug) 3262 log(LOG_DEBUG, "%s: ipv6cp_open(): no IPv6 interface\n", 3263 ifp->if_xname); 3264 return; 3265 } 3266 3267 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3268 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3269 sppp_open_event(&ipv6cp, sp); 3270 } 3271 3272 static void 3273 sppp_ipv6cp_close(struct sppp *sp) 3274 { 3275 sppp_close_event(&ipv6cp, sp); 3276 } 3277 3278 static void 3279 sppp_ipv6cp_TO(void *cookie) 3280 { 3281 sppp_to_event(&ipv6cp, (struct sppp *)cookie); 3282 } 3283 3284 /* 3285 * Analyze a configure request. Return true if it was agreeable, and 3286 * caused action sca, false if it has been rejected or nak'ed, and 3287 * caused action scn. (The return value is used to make the state 3288 * transition decision in the state automaton.) 3289 */ 3290 static int 3291 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3292 { 3293 u_char *buf, *r, *p; 3294 struct ifnet *ifp = &sp->pp_if; 3295 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3296 struct in6_addr myaddr, desiredaddr, suggestaddr; 3297 int ifidcount; 3298 int type; 3299 int collision, nohisaddr; 3300 3301 len -= 4; 3302 origlen = len; 3303 /* 3304 * Make sure to allocate a buf that can at least hold a 3305 * conf-nak with an `address' option. We might need it below. 3306 */ 3307 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 3308 if (! buf) 3309 return (0); 3310 3311 /* pass 1: see if we can recognize them */ 3312 if (debug) 3313 log(LOG_DEBUG, "%s: ipv6cp parse opts:", 3314 ifp->if_xname); 3315 p = (void *)(h + 1); 3316 ifidcount = 0; 3317 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3318 if (debug) 3319 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3320 switch (*p) { 3321 case IPV6CP_OPT_IFID: 3322 if (len >= 10 && p[1] == 10 && ifidcount == 0) { 3323 /* correctly formed address option */ 3324 ifidcount++; 3325 continue; 3326 } 3327 if (debug) 3328 addlog(" [invalid]"); 3329 break; 3330 #ifdef notyet 3331 case IPV6CP_OPT_COMPRESSION: 3332 if (len >= 4 && p[1] >= 4) { 3333 /* correctly formed compress option */ 3334 continue; 3335 } 3336 if (debug) 3337 addlog(" [invalid]"); 3338 break; 3339 #endif 3340 default: 3341 /* Others not supported. */ 3342 if (debug) 3343 addlog(" [rej]"); 3344 break; 3345 } 3346 /* Add the option to rejected list. */ 3347 bcopy (p, r, p[1]); 3348 r += p[1]; 3349 rlen += p[1]; 3350 } 3351 if (rlen) { 3352 if (debug) 3353 addlog(" send conf-rej\n"); 3354 sppp_cp_send(sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3355 goto end; 3356 } else if (debug) 3357 addlog("\n"); 3358 3359 /* pass 2: parse option values */ 3360 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3361 if (debug) 3362 log(LOG_DEBUG, "%s: ipv6cp parse opt values: ", 3363 ifp->if_xname); 3364 p = (void *)(h + 1); 3365 len = origlen; 3366 type = CONF_ACK; 3367 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3368 if (debug) 3369 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3370 switch (*p) { 3371 #ifdef notyet 3372 case IPV6CP_OPT_COMPRESSION: 3373 continue; 3374 #endif 3375 case IPV6CP_OPT_IFID: 3376 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3377 bcopy(&p[2], &desiredaddr.s6_addr[8], 8); 3378 collision = (memcmp(&desiredaddr.s6_addr[8], 3379 &myaddr.s6_addr[8], 8) == 0); 3380 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3381 3382 desiredaddr.s6_addr16[0] = htons(0xfe80); 3383 (void)in6_setscope(&desiredaddr, &sp->pp_if, NULL); 3384 3385 if (!collision && !nohisaddr) { 3386 /* no collision, hisaddr known - Conf-Ack */ 3387 type = CONF_ACK; 3388 3389 if (debug) { 3390 addlog(" %s [%s]", 3391 ip6_sprintf(&desiredaddr), 3392 sppp_cp_type_name(type)); 3393 } 3394 continue; 3395 } 3396 3397 memset(&suggestaddr, 0, sizeof(&suggestaddr)); 3398 if (collision && nohisaddr) { 3399 /* collision, hisaddr unknown - Conf-Rej */ 3400 type = CONF_REJ; 3401 memset(&p[2], 0, 8); 3402 } else { 3403 /* 3404 * - no collision, hisaddr unknown, or 3405 * - collision, hisaddr known 3406 * Conf-Nak, suggest hisaddr 3407 */ 3408 type = CONF_NAK; 3409 sppp_suggest_ip6_addr(sp, &suggestaddr); 3410 bcopy(&suggestaddr.s6_addr[8], &p[2], 8); 3411 } 3412 if (debug) 3413 addlog(" %s [%s]", ip6_sprintf(&desiredaddr), 3414 sppp_cp_type_name(type)); 3415 break; 3416 } 3417 /* Add the option to nak'ed list. */ 3418 bcopy (p, r, p[1]); 3419 r += p[1]; 3420 rlen += p[1]; 3421 } 3422 3423 if (rlen == 0 && type == CONF_ACK) { 3424 if (debug) 3425 addlog(" send %s\n", sppp_cp_type_name(type)); 3426 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, origlen, h + 1); 3427 } else { 3428 #ifdef notdef 3429 if (type == CONF_ACK) 3430 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3431 #endif 3432 3433 if (debug) { 3434 addlog(" send %s suggest %s\n", 3435 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr)); 3436 } 3437 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3438 } 3439 3440 end: 3441 free(buf, M_TEMP); 3442 return (rlen == 0); 3443 } 3444 3445 /* 3446 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3447 * negotiation. 3448 */ 3449 static void 3450 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3451 { 3452 u_char *buf, *p; 3453 struct ifnet *ifp = &sp->pp_if; 3454 int debug = ifp->if_flags & IFF_DEBUG; 3455 3456 len -= 4; 3457 buf = malloc (len, M_TEMP, M_NOWAIT); 3458 if (!buf) 3459 return; 3460 3461 if (debug) 3462 log(LOG_DEBUG, "%s: ipv6cp rej opts:", 3463 ifp->if_xname); 3464 3465 p = (void *)(h + 1); 3466 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3467 if (debug) 3468 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3469 switch (*p) { 3470 case IPV6CP_OPT_IFID: 3471 /* 3472 * Peer doesn't grok address option. This is 3473 * bad. XXX Should we better give up here? 3474 */ 3475 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3476 break; 3477 #ifdef notyet 3478 case IPV6CP_OPT_COMPRESS: 3479 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3480 break; 3481 #endif 3482 } 3483 } 3484 if (debug) 3485 addlog("\n"); 3486 free(buf, M_TEMP); 3487 return; 3488 } 3489 3490 /* 3491 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3492 * negotiation. 3493 */ 3494 static void 3495 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3496 { 3497 u_char *buf, *p; 3498 struct ifnet *ifp = &sp->pp_if; 3499 int debug = ifp->if_flags & IFF_DEBUG; 3500 struct in6_addr suggestaddr; 3501 3502 len -= 4; 3503 buf = malloc (len, M_TEMP, M_NOWAIT); 3504 if (!buf) 3505 return; 3506 3507 if (debug) 3508 log(LOG_DEBUG, "%s: ipv6cp nak opts:", 3509 ifp->if_xname); 3510 3511 p = (void *)(h + 1); 3512 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3513 if (debug) 3514 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3515 switch (*p) { 3516 case IPV6CP_OPT_IFID: 3517 /* 3518 * Peer doesn't like our local ifid. See 3519 * if we can do something for him. We'll drop 3520 * him our address then. 3521 */ 3522 if (len < 10 || p[1] != 10) 3523 break; 3524 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3525 suggestaddr.s6_addr16[0] = htons(0xfe80); 3526 (void)in6_setscope(&suggestaddr, &sp->pp_if, NULL); 3527 bcopy(&p[2], &suggestaddr.s6_addr[8], 8); 3528 3529 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3530 if (debug) 3531 addlog(" [suggestaddr %s]", 3532 ip6_sprintf(&suggestaddr)); 3533 #ifdef IPV6CP_MYIFID_DYN 3534 /* 3535 * When doing dynamic address assignment, 3536 * we accept his offer. 3537 */ 3538 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3539 struct in6_addr lastsuggest; 3540 /* 3541 * If <suggested myaddr from peer> equals to 3542 * <hisaddr we have suggested last time>, 3543 * we have a collision. generate new random 3544 * ifid. 3545 */ 3546 sppp_suggest_ip6_addr(&lastsuggest); 3547 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3548 lastsuggest)) { 3549 if (debug) 3550 addlog(" [random]"); 3551 sppp_gen_ip6_addr(sp, &suggestaddr); 3552 } 3553 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3554 if (debug) 3555 addlog(" [agree]"); 3556 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3557 } 3558 #else 3559 /* 3560 * Since we do not do dynamic address assignment, 3561 * we ignore it and thus continue to negotiate 3562 * our already existing value. This can possibly 3563 * go into infinite request-reject loop. 3564 * 3565 * This is not likely because we normally use 3566 * ifid based on MAC-address. 3567 * If you have no ethernet card on the node, too bad. 3568 * XXX should we use fail_counter? 3569 */ 3570 #endif 3571 break; 3572 #ifdef notyet 3573 case IPV6CP_OPT_COMPRESS: 3574 /* 3575 * Peer wants different compression parameters. 3576 */ 3577 break; 3578 #endif 3579 } 3580 } 3581 if (debug) 3582 addlog("\n"); 3583 free(buf, M_TEMP); 3584 return; 3585 } 3586 3587 static void 3588 sppp_ipv6cp_tlu(struct sppp *sp) 3589 { 3590 /* we are up - notify isdn daemon */ 3591 if (sp->pp_con) 3592 sp->pp_con(sp); 3593 } 3594 3595 static void 3596 sppp_ipv6cp_tld(struct sppp *sp) 3597 { 3598 } 3599 3600 static void 3601 sppp_ipv6cp_tls(struct sppp *sp) 3602 { 3603 /* indicate to LCP that it must stay alive */ 3604 sp->lcp.protos |= (1 << IDX_IPV6CP); 3605 } 3606 3607 static void 3608 sppp_ipv6cp_tlf(struct sppp *sp) 3609 { 3610 /* we no longer need LCP */ 3611 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3612 } 3613 3614 static void 3615 sppp_ipv6cp_scr(struct sppp *sp) 3616 { 3617 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3618 struct in6_addr ouraddr; 3619 int i = 0; 3620 3621 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3622 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3623 opt[i++] = IPV6CP_OPT_IFID; 3624 opt[i++] = 10; 3625 bcopy(&ouraddr.s6_addr[8], &opt[i], 8); 3626 i += 8; 3627 } 3628 3629 #ifdef notyet 3630 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 3631 opt[i++] = IPV6CP_OPT_COMPRESSION; 3632 opt[i++] = 4; 3633 opt[i++] = 0; /* TBD */ 3634 opt[i++] = 0; /* TBD */ 3635 /* variable length data may follow */ 3636 } 3637 #endif 3638 3639 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 3640 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 3641 } 3642 #else /*INET6*/ 3643 static void sppp_ipv6cp_init(struct sppp *sp) 3644 { 3645 } 3646 3647 static void sppp_ipv6cp_up(struct sppp *sp) 3648 { 3649 } 3650 3651 static void sppp_ipv6cp_down(struct sppp *sp) 3652 { 3653 } 3654 3655 3656 static void sppp_ipv6cp_open(struct sppp *sp) 3657 { 3658 } 3659 3660 static void sppp_ipv6cp_close(struct sppp *sp) 3661 { 3662 } 3663 3664 static void sppp_ipv6cp_TO(void *sp) 3665 { 3666 } 3667 3668 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3669 { 3670 return 0; 3671 } 3672 3673 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3674 { 3675 } 3676 3677 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3678 { 3679 } 3680 3681 static void sppp_ipv6cp_tlu(struct sppp *sp) 3682 { 3683 } 3684 3685 static void sppp_ipv6cp_tld(struct sppp *sp) 3686 { 3687 } 3688 3689 static void sppp_ipv6cp_tls(struct sppp *sp) 3690 { 3691 } 3692 3693 static void sppp_ipv6cp_tlf(struct sppp *sp) 3694 { 3695 } 3696 3697 static void sppp_ipv6cp_scr(struct sppp *sp) 3698 { 3699 } 3700 #endif /*INET6*/ 3701 3702 3703 /* 3704 *--------------------------------------------------------------------------* 3705 * * 3706 * The CHAP implementation. * 3707 * * 3708 *--------------------------------------------------------------------------* 3709 */ 3710 3711 /* 3712 * The authentication protocols don't employ a full-fledged state machine as 3713 * the control protocols do, since they do have Open and Close events, but 3714 * not Up and Down, nor are they explicitly terminated. Also, use of the 3715 * authentication protocols may be different in both directions (this makes 3716 * sense, think of a machine that never accepts incoming calls but only 3717 * calls out, it doesn't require the called party to authenticate itself). 3718 * 3719 * Our state machine for the local authentication protocol (we are requesting 3720 * the peer to authenticate) looks like: 3721 * 3722 * RCA- 3723 * +--------------------------------------------+ 3724 * V scn,tld| 3725 * +--------+ Close +---------+ RCA+ 3726 * | |<----------------------------------| |------+ 3727 * +--->| Closed | TO* | Opened | sca | 3728 * | | |-----+ +-------| |<-----+ 3729 * | +--------+ irc | | +---------+ 3730 * | ^ | | ^ 3731 * | | | | | 3732 * | | | | | 3733 * | TO-| | | | 3734 * | |tld TO+ V | | 3735 * | | +------->+ | | 3736 * | | | | | | 3737 * | +--------+ V | | 3738 * | | |<----+<--------------------+ | 3739 * | | Req- | scr | 3740 * | | Sent | | 3741 * | | | | 3742 * | +--------+ | 3743 * | RCA- | | RCA+ | 3744 * +------+ +------------------------------------------+ 3745 * scn,tld sca,irc,ict,tlu 3746 * 3747 * 3748 * with: 3749 * 3750 * Open: LCP reached authentication phase 3751 * Close: LCP reached terminate phase 3752 * 3753 * RCA+: received reply (pap-req, chap-response), acceptable 3754 * RCN: received reply (pap-req, chap-response), not acceptable 3755 * TO+: timeout with restart counter >= 0 3756 * TO-: timeout with restart counter < 0 3757 * TO*: reschedule timeout for CHAP 3758 * 3759 * scr: send request packet (none for PAP, chap-challenge) 3760 * sca: send ack packet (pap-ack, chap-success) 3761 * scn: send nak packet (pap-nak, chap-failure) 3762 * ict: initialize re-challenge timer (CHAP only) 3763 * 3764 * tlu: this-layer-up, LCP reaches network phase 3765 * tld: this-layer-down, LCP enters terminate phase 3766 * 3767 * Note that in CHAP mode, after sending a new challenge, while the state 3768 * automaton falls back into Req-Sent state, it doesn't signal a tld 3769 * event to LCP, so LCP remains in network phase. Only after not getting 3770 * any response (or after getting an unacceptable response), CHAP closes, 3771 * causing LCP to enter terminate phase. 3772 * 3773 * With PAP, there is no initial request that can be sent. The peer is 3774 * expected to send one based on the successful negotiation of PAP as 3775 * the authentication protocol during the LCP option negotiation. 3776 * 3777 * Incoming authentication protocol requests (remote requests 3778 * authentication, we are peer) don't employ a state machine at all, 3779 * they are simply answered. Some peers [Ascend P50 firmware rev 3780 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 3781 * still in authentication phase (thereby violating the standard that 3782 * demands that these NCP packets are to be discarded), so we keep 3783 * track of the peer demanding us to authenticate, and only proceed to 3784 * phase network once we've seen a positive acknowledge for the 3785 * authentication. 3786 */ 3787 3788 /* 3789 * Handle incoming CHAP packets. 3790 */ 3791 void 3792 sppp_chap_input(struct sppp *sp, struct mbuf *m) 3793 { 3794 STDDCL; 3795 struct lcp_header *h; 3796 int len, x; 3797 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 3798 int value_len, name_len; 3799 MD5_CTX ctx; 3800 3801 len = m->m_pkthdr.len; 3802 if (len < 4) { 3803 if (debug) 3804 log(LOG_DEBUG, 3805 "%s: chap invalid packet length: %d bytes\n", 3806 ifp->if_xname, len); 3807 return; 3808 } 3809 h = mtod(m, struct lcp_header *); 3810 if (len > ntohs(h->len)) 3811 len = ntohs(h->len); 3812 3813 switch (h->type) { 3814 /* challenge, failure and success are his authproto */ 3815 case CHAP_CHALLENGE: 3816 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 3817 /* can't do anything usefull */ 3818 sp->pp_auth_failures++; 3819 printf("%s: chap input without my name and my secret being set\n", 3820 ifp->if_xname); 3821 break; 3822 } 3823 value = 1 + (u_char *)(h + 1); 3824 value_len = value[-1]; 3825 name = value + value_len; 3826 name_len = len - value_len - 5; 3827 if (name_len < 0) { 3828 if (debug) { 3829 log(LOG_DEBUG, 3830 "%s: chap corrupted challenge " 3831 "<%s id=0x%x len=%d", 3832 ifp->if_xname, 3833 sppp_auth_type_name(PPP_CHAP, h->type), 3834 h->ident, ntohs(h->len)); 3835 if (len > 4) 3836 sppp_print_bytes((u_char *)(h + 1), 3837 len - 4); 3838 addlog(">\n"); 3839 } 3840 break; 3841 } 3842 3843 if (debug) { 3844 log(LOG_DEBUG, 3845 "%s: chap input <%s id=0x%x len=%d name=", 3846 ifp->if_xname, 3847 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 3848 ntohs(h->len)); 3849 sppp_print_string((char *) name, name_len); 3850 addlog(" value-size=%d value=", value_len); 3851 sppp_print_bytes(value, value_len); 3852 addlog(">\n"); 3853 } 3854 3855 /* Compute reply value. */ 3856 MD5Init(&ctx); 3857 MD5Update(&ctx, &h->ident, 1); 3858 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 3859 MD5Update(&ctx, value, value_len); 3860 MD5Final(digest, &ctx); 3861 dsize = sizeof digest; 3862 3863 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 3864 sizeof dsize, (const char *)&dsize, 3865 sizeof digest, digest, 3866 sp->myauth.name_len, 3867 sp->myauth.name, 3868 0); 3869 break; 3870 3871 case CHAP_SUCCESS: 3872 if (debug) { 3873 log(LOG_DEBUG, "%s: chap success", 3874 ifp->if_xname); 3875 if (len > 4) { 3876 addlog(": "); 3877 sppp_print_string((char *)(h + 1), len - 4); 3878 } 3879 addlog("\n"); 3880 } 3881 x = splnet(); 3882 sp->pp_auth_failures = 0; 3883 sp->pp_flags &= ~PP_NEEDAUTH; 3884 if (sp->myauth.proto == PPP_CHAP && 3885 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 3886 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 3887 /* 3888 * We are authenticator for CHAP but didn't 3889 * complete yet. Leave it to tlu to proceed 3890 * to network phase. 3891 */ 3892 splx(x); 3893 break; 3894 } 3895 splx(x); 3896 sppp_phase_network(sp); 3897 break; 3898 3899 case CHAP_FAILURE: 3900 x = splnet(); 3901 sp->pp_auth_failures++; 3902 splx(x); 3903 if (debug) { 3904 log(LOG_INFO, "%s: chap failure", 3905 ifp->if_xname); 3906 if (len > 4) { 3907 addlog(": "); 3908 sppp_print_string((char *)(h + 1), len - 4); 3909 } 3910 addlog("\n"); 3911 } else 3912 log(LOG_INFO, "%s: chap failure\n", 3913 ifp->if_xname); 3914 /* await LCP shutdown by authenticator */ 3915 break; 3916 3917 /* response is my authproto */ 3918 case CHAP_RESPONSE: 3919 if (sp->hisauth.secret == NULL) { 3920 /* can't do anything usefull */ 3921 printf("%s: chap input without his secret being set\n", 3922 ifp->if_xname); 3923 break; 3924 } 3925 value = 1 + (u_char *)(h + 1); 3926 value_len = value[-1]; 3927 name = value + value_len; 3928 name_len = len - value_len - 5; 3929 if (name_len < 0) { 3930 if (debug) { 3931 log(LOG_DEBUG, 3932 "%s: chap corrupted response " 3933 "<%s id=0x%x len=%d", 3934 ifp->if_xname, 3935 sppp_auth_type_name(PPP_CHAP, h->type), 3936 h->ident, ntohs(h->len)); 3937 if (len > 4) 3938 sppp_print_bytes((u_char *)(h + 1), 3939 len - 4); 3940 addlog(">\n"); 3941 } 3942 break; 3943 } 3944 if (h->ident != sp->confid[IDX_CHAP]) { 3945 if (debug) 3946 log(LOG_DEBUG, 3947 "%s: chap dropping response for old ID " 3948 "(got %d, expected %d)\n", 3949 ifp->if_xname, 3950 h->ident, sp->confid[IDX_CHAP]); 3951 break; 3952 } 3953 if (sp->hisauth.name != NULL && 3954 (name_len != sp->hisauth.name_len 3955 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 3956 log(LOG_INFO, "%s: chap response, his name ", 3957 ifp->if_xname); 3958 sppp_print_string(name, name_len); 3959 addlog(" != expected "); 3960 sppp_print_string(sp->hisauth.name, 3961 sp->hisauth.name_len); 3962 addlog("\n"); 3963 goto chap_failure; 3964 } 3965 if (debug) { 3966 log(LOG_DEBUG, "%s: chap input(%s) " 3967 "<%s id=0x%x len=%d name=", 3968 ifp->if_xname, 3969 sppp_state_name(sp->state[IDX_CHAP]), 3970 sppp_auth_type_name(PPP_CHAP, h->type), 3971 h->ident, ntohs(h->len)); 3972 sppp_print_string((char *)name, name_len); 3973 addlog(" value-size=%d value=", value_len); 3974 sppp_print_bytes(value, value_len); 3975 addlog(">\n"); 3976 } 3977 if (value_len != sizeof(sp->myauth.challenge)) { 3978 if (debug) 3979 log(LOG_DEBUG, 3980 "%s: chap bad hash value length: " 3981 "%d bytes, should be %ld\n", 3982 ifp->if_xname, value_len, 3983 (long) sizeof(sp->myauth.challenge)); 3984 goto chap_failure; 3985 } 3986 3987 MD5Init(&ctx); 3988 MD5Update(&ctx, &h->ident, 1); 3989 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 3990 MD5Update(&ctx, sp->myauth.challenge, sizeof(sp->myauth.challenge)); 3991 MD5Final(digest, &ctx); 3992 3993 #define FAILMSG "Failed..." 3994 #define SUCCMSG "Welcome!" 3995 3996 if (value_len != sizeof digest || 3997 memcmp(digest, value, value_len) != 0) { 3998 chap_failure: 3999 /* action scn, tld */ 4000 x = splnet(); 4001 sp->pp_auth_failures++; 4002 splx(x); 4003 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 4004 sizeof(FAILMSG) - 1, (const u_char *)FAILMSG, 4005 0); 4006 chap.tld(sp); 4007 break; 4008 } 4009 sp->pp_auth_failures = 0; 4010 /* action sca, perhaps tlu */ 4011 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 4012 sp->state[IDX_CHAP] == STATE_OPENED) 4013 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 4014 sizeof(SUCCMSG) - 1, (const u_char *)SUCCMSG, 4015 0); 4016 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 4017 sppp_cp_change_state(&chap, sp, STATE_OPENED); 4018 chap.tlu(sp); 4019 } 4020 break; 4021 4022 default: 4023 /* Unknown CHAP packet type -- ignore. */ 4024 if (debug) { 4025 log(LOG_DEBUG, "%s: chap unknown input(%s) " 4026 "<0x%x id=0x%xh len=%d", 4027 ifp->if_xname, 4028 sppp_state_name(sp->state[IDX_CHAP]), 4029 h->type, h->ident, ntohs(h->len)); 4030 if (len > 4) 4031 sppp_print_bytes((u_char *)(h + 1), len - 4); 4032 addlog(">\n"); 4033 } 4034 break; 4035 4036 } 4037 } 4038 4039 static void 4040 sppp_chap_init(struct sppp *sp) 4041 { 4042 /* Chap doesn't have STATE_INITIAL at all. */ 4043 sp->state[IDX_CHAP] = STATE_CLOSED; 4044 sp->fail_counter[IDX_CHAP] = 0; 4045 sp->pp_seq[IDX_CHAP] = 0; 4046 sp->pp_rseq[IDX_CHAP] = 0; 4047 callout_init(&sp->ch[IDX_CHAP]); 4048 } 4049 4050 static void 4051 sppp_chap_open(struct sppp *sp) 4052 { 4053 if (sp->myauth.proto == PPP_CHAP && 4054 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4055 /* we are authenticator for CHAP, start it */ 4056 chap.scr(sp); 4057 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4058 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4059 } 4060 /* nothing to be done if we are peer, await a challenge */ 4061 } 4062 4063 static void 4064 sppp_chap_close(struct sppp *sp) 4065 { 4066 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4067 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4068 } 4069 4070 static void 4071 sppp_chap_TO(void *cookie) 4072 { 4073 struct sppp *sp = (struct sppp *)cookie; 4074 STDDCL; 4075 int s; 4076 4077 s = splnet(); 4078 if (debug) 4079 log(LOG_DEBUG, "%s: chap TO(%s) rst_counter = %d\n", 4080 ifp->if_xname, 4081 sppp_state_name(sp->state[IDX_CHAP]), 4082 sp->rst_counter[IDX_CHAP]); 4083 4084 if (--sp->rst_counter[IDX_CHAP] < 0) 4085 /* TO- event */ 4086 switch (sp->state[IDX_CHAP]) { 4087 case STATE_REQ_SENT: 4088 chap.tld(sp); 4089 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4090 break; 4091 } 4092 else 4093 /* TO+ (or TO*) event */ 4094 switch (sp->state[IDX_CHAP]) { 4095 case STATE_OPENED: 4096 /* TO* event */ 4097 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4098 /* fall through */ 4099 case STATE_REQ_SENT: 4100 chap.scr(sp); 4101 /* sppp_cp_change_state() will restart the timer */ 4102 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4103 break; 4104 } 4105 4106 splx(s); 4107 } 4108 4109 static void 4110 sppp_chap_tlu(struct sppp *sp) 4111 { 4112 STDDCL; 4113 int i, x; 4114 4115 i = 0; 4116 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4117 4118 /* 4119 * Some broken CHAP implementations (Conware CoNet, firmware 4120 * 4.0.?) don't want to re-authenticate their CHAP once the 4121 * initial challenge-response exchange has taken place. 4122 * Provide for an option to avoid rechallenges. 4123 */ 4124 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4125 /* 4126 * Compute the re-challenge timeout. This will yield 4127 * a number between 300 and 810 seconds. 4128 */ 4129 i = 300 + ((unsigned)(arc4random() & 0xff00) >> 7); 4130 4131 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4132 } 4133 4134 if (debug) { 4135 log(LOG_DEBUG, 4136 "%s: chap %s, ", 4137 ifp->if_xname, 4138 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu"); 4139 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) 4140 addlog("next re-challenge in %d seconds\n", i); 4141 else 4142 addlog("re-challenging supressed\n"); 4143 } 4144 4145 x = splnet(); 4146 sp->pp_auth_failures = 0; 4147 /* indicate to LCP that we need to be closed down */ 4148 sp->lcp.protos |= (1 << IDX_CHAP); 4149 4150 if (sp->pp_flags & PP_NEEDAUTH) { 4151 /* 4152 * Remote is authenticator, but his auth proto didn't 4153 * complete yet. Defer the transition to network 4154 * phase. 4155 */ 4156 splx(x); 4157 return; 4158 } 4159 splx(x); 4160 4161 /* 4162 * If we are already in phase network, we are done here. This 4163 * is the case if this is a dummy tlu event after a re-challenge. 4164 */ 4165 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4166 sppp_phase_network(sp); 4167 } 4168 4169 static void 4170 sppp_chap_tld(struct sppp *sp) 4171 { 4172 STDDCL; 4173 4174 if (debug) 4175 log(LOG_DEBUG, "%s: chap tld\n", ifp->if_xname); 4176 callout_stop(&sp->ch[IDX_CHAP]); 4177 sp->lcp.protos &= ~(1 << IDX_CHAP); 4178 4179 lcp.Close(sp); 4180 } 4181 4182 static void 4183 sppp_chap_scr(struct sppp *sp) 4184 { 4185 u_int32_t *ch; 4186 u_char clen; 4187 4188 if (sp->myauth.name == NULL) { 4189 /* can't do anything usefull */ 4190 printf("%s: chap starting without my name being set\n", 4191 sp->pp_if.if_xname); 4192 return; 4193 } 4194 4195 /* Compute random challenge. */ 4196 ch = (u_int32_t *)sp->myauth.challenge; 4197 ch[0] = arc4random(); 4198 ch[1] = arc4random(); 4199 ch[2] = arc4random(); 4200 ch[3] = arc4random(); 4201 clen = 16; /* 4 * sizeof(u_int32_t) */ 4202 4203 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4204 4205 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4206 sizeof clen, (const char *)&clen, 4207 sizeof(sp->myauth.challenge), sp->myauth.challenge, 4208 sp->myauth.name_len, 4209 sp->myauth.name, 4210 0); 4211 } 4212 4213 /* 4214 *--------------------------------------------------------------------------* 4215 * * 4216 * The PAP implementation. * 4217 * * 4218 *--------------------------------------------------------------------------* 4219 */ 4220 /* 4221 * For PAP, we need to keep a little state also if we are the peer, not the 4222 * authenticator. This is since we don't get a request to authenticate, but 4223 * have to repeatedly authenticate ourself until we got a response (or the 4224 * retry counter is expired). 4225 */ 4226 4227 /* 4228 * Handle incoming PAP packets. */ 4229 static void 4230 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4231 { 4232 STDDCL; 4233 struct lcp_header *h; 4234 int len, x; 4235 u_char mlen; 4236 char *name, *secret; 4237 int name_len, secret_len; 4238 4239 len = m->m_pkthdr.len; 4240 if (len < 5) { 4241 if (debug) 4242 log(LOG_DEBUG, 4243 "%s: pap invalid packet length: %d bytes\n", 4244 ifp->if_xname, len); 4245 return; 4246 } 4247 h = mtod(m, struct lcp_header *); 4248 if (len > ntohs(h->len)) 4249 len = ntohs(h->len); 4250 switch (h->type) { 4251 /* PAP request is my authproto */ 4252 case PAP_REQ: 4253 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4254 /* can't do anything usefull */ 4255 printf("%s: pap request without his name and his secret being set\n", 4256 ifp->if_xname); 4257 break; 4258 } 4259 name = 1 + (u_char *)(h + 1); 4260 name_len = name[-1]; 4261 secret = name + name_len + 1; 4262 if (name_len > len - 6 || 4263 (secret_len = secret[-1]) > len - 6 - name_len) { 4264 if (debug) { 4265 log(LOG_DEBUG, "%s: pap corrupted input " 4266 "<%s id=0x%x len=%d", 4267 ifp->if_xname, 4268 sppp_auth_type_name(PPP_PAP, h->type), 4269 h->ident, ntohs(h->len)); 4270 if (len > 4) 4271 sppp_print_bytes((u_char *)(h + 1), 4272 len - 4); 4273 addlog(">\n"); 4274 } 4275 break; 4276 } 4277 if (debug) { 4278 log(LOG_DEBUG, "%s: pap input(%s) " 4279 "<%s id=0x%x len=%d name=", 4280 ifp->if_xname, 4281 sppp_state_name(sp->state[IDX_PAP]), 4282 sppp_auth_type_name(PPP_PAP, h->type), 4283 h->ident, ntohs(h->len)); 4284 sppp_print_string((char *)name, name_len); 4285 addlog(" secret="); 4286 sppp_print_string((char *)secret, secret_len); 4287 addlog(">\n"); 4288 } 4289 if (name_len != sp->hisauth.name_len || 4290 secret_len != sp->hisauth.secret_len || 4291 memcmp(name, sp->hisauth.name, name_len) != 0 || 4292 memcmp(secret, sp->hisauth.secret, secret_len) != 0) { 4293 /* action scn, tld */ 4294 sp->pp_auth_failures++; 4295 mlen = sizeof(FAILMSG) - 1; 4296 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4297 sizeof mlen, (const char *)&mlen, 4298 sizeof(FAILMSG) - 1, (const u_char *)FAILMSG, 4299 0); 4300 pap.tld(sp); 4301 break; 4302 } 4303 /* action sca, perhaps tlu */ 4304 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4305 sp->state[IDX_PAP] == STATE_OPENED) { 4306 mlen = sizeof(SUCCMSG) - 1; 4307 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4308 sizeof mlen, (const char *)&mlen, 4309 sizeof(SUCCMSG) - 1, (const u_char *)SUCCMSG, 4310 0); 4311 } 4312 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4313 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4314 pap.tlu(sp); 4315 } 4316 break; 4317 4318 /* ack and nak are his authproto */ 4319 case PAP_ACK: 4320 callout_stop(&sp->pap_my_to_ch); 4321 if (debug) { 4322 log(LOG_DEBUG, "%s: pap success", 4323 ifp->if_xname); 4324 name_len = *(char *)h; 4325 if (len > 5 && name_len) { 4326 addlog(": "); 4327 sppp_print_string((char *)(h + 1), name_len); 4328 } 4329 addlog("\n"); 4330 } 4331 x = splnet(); 4332 sp->pp_auth_failures = 0; 4333 sp->pp_flags &= ~PP_NEEDAUTH; 4334 if (sp->myauth.proto == PPP_PAP && 4335 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4336 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4337 /* 4338 * We are authenticator for PAP but didn't 4339 * complete yet. Leave it to tlu to proceed 4340 * to network phase. 4341 */ 4342 splx(x); 4343 break; 4344 } 4345 splx(x); 4346 sppp_phase_network(sp); 4347 break; 4348 4349 case PAP_NAK: 4350 callout_stop(&sp->pap_my_to_ch); 4351 sp->pp_auth_failures++; 4352 if (debug) { 4353 log(LOG_INFO, "%s: pap failure", 4354 ifp->if_xname); 4355 name_len = *(char *)h; 4356 if (len > 5 && name_len) { 4357 addlog(": "); 4358 sppp_print_string((char *)(h + 1), name_len); 4359 } 4360 addlog("\n"); 4361 } else 4362 log(LOG_INFO, "%s: pap failure\n", 4363 ifp->if_xname); 4364 /* await LCP shutdown by authenticator */ 4365 break; 4366 4367 default: 4368 /* Unknown PAP packet type -- ignore. */ 4369 if (debug) { 4370 log(LOG_DEBUG, "%s: pap corrupted input " 4371 "<0x%x id=0x%x len=%d", 4372 ifp->if_xname, 4373 h->type, h->ident, ntohs(h->len)); 4374 if (len > 4) 4375 sppp_print_bytes((u_char *)(h + 1), len - 4); 4376 addlog(">\n"); 4377 } 4378 break; 4379 4380 } 4381 } 4382 4383 static void 4384 sppp_pap_init(struct sppp *sp) 4385 { 4386 /* PAP doesn't have STATE_INITIAL at all. */ 4387 sp->state[IDX_PAP] = STATE_CLOSED; 4388 sp->fail_counter[IDX_PAP] = 0; 4389 sp->pp_seq[IDX_PAP] = 0; 4390 sp->pp_rseq[IDX_PAP] = 0; 4391 callout_init(&sp->ch[IDX_PAP]); 4392 callout_init(&sp->pap_my_to_ch); 4393 } 4394 4395 static void 4396 sppp_pap_open(struct sppp *sp) 4397 { 4398 if (sp->hisauth.proto == PPP_PAP && 4399 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4400 /* we are authenticator for PAP, start our timer */ 4401 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4402 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4403 } 4404 if (sp->myauth.proto == PPP_PAP) { 4405 /* we are peer, send a request, and start a timer */ 4406 pap.scr(sp); 4407 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4408 sppp_pap_my_TO, sp); 4409 } 4410 } 4411 4412 static void 4413 sppp_pap_close(struct sppp *sp) 4414 { 4415 if (sp->state[IDX_PAP] != STATE_CLOSED) 4416 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4417 } 4418 4419 /* 4420 * That's the timeout routine if we are authenticator. Since the 4421 * authenticator is basically passive in PAP, we can't do much here. 4422 */ 4423 static void 4424 sppp_pap_TO(void *cookie) 4425 { 4426 struct sppp *sp = (struct sppp *)cookie; 4427 STDDCL; 4428 int s; 4429 4430 s = splnet(); 4431 if (debug) 4432 log(LOG_DEBUG, "%s: pap TO(%s) rst_counter = %d\n", 4433 ifp->if_xname, 4434 sppp_state_name(sp->state[IDX_PAP]), 4435 sp->rst_counter[IDX_PAP]); 4436 4437 if (--sp->rst_counter[IDX_PAP] < 0) 4438 /* TO- event */ 4439 switch (sp->state[IDX_PAP]) { 4440 case STATE_REQ_SENT: 4441 pap.tld(sp); 4442 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4443 break; 4444 } 4445 else 4446 /* TO+ event, not very much we could do */ 4447 switch (sp->state[IDX_PAP]) { 4448 case STATE_REQ_SENT: 4449 /* sppp_cp_change_state() will restart the timer */ 4450 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4451 break; 4452 } 4453 4454 splx(s); 4455 } 4456 4457 /* 4458 * That's the timeout handler if we are peer. Since the peer is active, 4459 * we need to retransmit our PAP request since it is apparently lost. 4460 * XXX We should impose a max counter. 4461 */ 4462 static void 4463 sppp_pap_my_TO(void *cookie) 4464 { 4465 struct sppp *sp = (struct sppp *)cookie; 4466 STDDCL; 4467 4468 if (debug) 4469 log(LOG_DEBUG, "%s: pap peer TO\n", 4470 ifp->if_xname); 4471 4472 pap.scr(sp); 4473 } 4474 4475 static void 4476 sppp_pap_tlu(struct sppp *sp) 4477 { 4478 STDDCL; 4479 int x; 4480 4481 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4482 4483 if (debug) 4484 log(LOG_DEBUG, "%s: %s tlu\n", 4485 ifp->if_xname, pap.name); 4486 4487 x = splnet(); 4488 sp->pp_auth_failures = 0; 4489 /* indicate to LCP that we need to be closed down */ 4490 sp->lcp.protos |= (1 << IDX_PAP); 4491 4492 if (sp->pp_flags & PP_NEEDAUTH) { 4493 /* 4494 * Remote is authenticator, but his auth proto didn't 4495 * complete yet. Defer the transition to network 4496 * phase. 4497 */ 4498 splx(x); 4499 return; 4500 } 4501 splx(x); 4502 sppp_phase_network(sp); 4503 } 4504 4505 static void 4506 sppp_pap_tld(struct sppp *sp) 4507 { 4508 STDDCL; 4509 4510 if (debug) 4511 log(LOG_DEBUG, "%s: pap tld\n", ifp->if_xname); 4512 callout_stop(&sp->ch[IDX_PAP]); 4513 callout_stop(&sp->pap_my_to_ch); 4514 sp->lcp.protos &= ~(1 << IDX_PAP); 4515 4516 lcp.Close(sp); 4517 } 4518 4519 static void 4520 sppp_pap_scr(struct sppp *sp) 4521 { 4522 u_char idlen, pwdlen; 4523 4524 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4525 /* can't do anything usefull */ 4526 printf("%s: pap starting without my name and secret being set\n", 4527 sp->pp_if.if_xname); 4528 return; 4529 } 4530 4531 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4532 pwdlen = sp->myauth.secret_len; 4533 idlen = sp->myauth.name_len; 4534 4535 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 4536 sizeof idlen, (const char *)&idlen, 4537 idlen, sp->myauth.name, 4538 sizeof pwdlen, (const char *)&pwdlen, 4539 pwdlen, sp->myauth.secret, 4540 0); 4541 } 4542 4543 /* 4544 * Random miscellaneous functions. 4545 */ 4546 4547 /* 4548 * Send a PAP or CHAP proto packet. 4549 * 4550 * Varadic function, each of the elements for the ellipsis is of type 4551 * ``size_t mlen, const u_char *msg''. Processing will stop iff 4552 * mlen == 0. 4553 * NOTE: never declare variadic functions with types subject to type 4554 * promotion (i.e. u_char). This is asking for big trouble depending 4555 * on the architecture you are on... 4556 */ 4557 4558 static void 4559 sppp_auth_send(const struct cp *cp, struct sppp *sp, 4560 unsigned int type, unsigned int id, 4561 ...) 4562 { 4563 STDDCL; 4564 struct lcp_header *lh; 4565 struct mbuf *m; 4566 u_char *p; 4567 int len; 4568 size_t pkthdrlen; 4569 unsigned int mlen; 4570 const char *msg; 4571 va_list ap; 4572 4573 MGETHDR(m, M_DONTWAIT, MT_DATA); 4574 if (! m) 4575 return; 4576 m->m_pkthdr.rcvif = 0; 4577 4578 if (sp->pp_flags & PP_NOFRAMING) { 4579 *mtod(m, u_int16_t *) = htons(cp->proto); 4580 pkthdrlen = 2; 4581 lh = (struct lcp_header *)(mtod(m, u_int8_t *)+2); 4582 } else { 4583 struct ppp_header *h; 4584 h = mtod(m, struct ppp_header *); 4585 h->address = PPP_ALLSTATIONS; /* broadcast address */ 4586 h->control = PPP_UI; /* Unnumbered Info */ 4587 h->protocol = htons(cp->proto); 4588 pkthdrlen = PPP_HEADER_LEN; 4589 4590 lh = (struct lcp_header *)(h + 1); 4591 } 4592 4593 lh->type = type; 4594 lh->ident = id; 4595 p = (u_char *)(lh + 1); 4596 4597 va_start(ap, id); 4598 len = 0; 4599 4600 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 4601 msg = va_arg(ap, const char *); 4602 len += mlen; 4603 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 4604 va_end(ap); 4605 m_freem(m); 4606 return; 4607 } 4608 4609 bcopy(msg, p, mlen); 4610 p += mlen; 4611 } 4612 va_end(ap); 4613 4614 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 4615 lh->len = htons(LCP_HEADER_LEN + len); 4616 4617 if (debug) { 4618 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 4619 ifp->if_xname, cp->name, 4620 sppp_auth_type_name(cp->proto, lh->type), 4621 lh->ident, ntohs(lh->len)); 4622 if (len) 4623 sppp_print_bytes((u_char *)(lh + 1), len); 4624 addlog(">\n"); 4625 } 4626 if (IF_QFULL(&sp->pp_cpq)) { 4627 IF_DROP(&sp->pp_fastq); 4628 IF_DROP(&ifp->if_snd); 4629 m_freem(m); 4630 ++ifp->if_oerrors; 4631 return; 4632 } else 4633 IF_ENQUEUE(&sp->pp_cpq, m); 4634 if (! (ifp->if_flags & IFF_OACTIVE)) 4635 (*ifp->if_start)(ifp); 4636 ifp->if_obytes += m->m_pkthdr.len + 3; 4637 } 4638 4639 /* 4640 * Send keepalive packets, every 10 seconds. 4641 */ 4642 static void 4643 sppp_keepalive(void *dummy) 4644 { 4645 struct sppp *sp; 4646 int s; 4647 time_t now; 4648 4649 s = splnet(); 4650 now = time_uptime; 4651 for (sp=spppq; sp; sp=sp->pp_next) { 4652 struct ifnet *ifp = &sp->pp_if; 4653 4654 /* check idle timeout */ 4655 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 4656 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 4657 /* idle timeout is enabled for this interface */ 4658 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 4659 if (ifp->if_flags & IFF_DEBUG) 4660 printf("%s: no activity for %lu seconds\n", 4661 sp->pp_if.if_xname, 4662 (unsigned long)(now-sp->pp_last_activity)); 4663 lcp.Close(sp); 4664 continue; 4665 } 4666 } 4667 4668 /* Keepalive mode disabled or channel down? */ 4669 if (! (sp->pp_flags & PP_KEEPALIVE) || 4670 ! (ifp->if_flags & IFF_RUNNING)) 4671 continue; 4672 4673 /* No keepalive in PPP mode if LCP not opened yet. */ 4674 if (! (sp->pp_flags & PP_CISCO) && 4675 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) 4676 continue; 4677 4678 /* No echo reply, but maybe user data passed through? */ 4679 if ((now - sp->pp_last_receive) < sp->pp_max_noreceive) { 4680 sp->pp_alivecnt = 0; 4681 continue; 4682 } 4683 4684 if (sp->pp_alivecnt >= sp->pp_maxalive) { 4685 /* No keepalive packets got. Stop the interface. */ 4686 if_down (ifp); 4687 IF_PURGE(&sp->pp_cpq); 4688 if (! (sp->pp_flags & PP_CISCO)) { 4689 printf("%s: LCP keepalive timed out, going to restart the connection\n", 4690 ifp->if_xname); 4691 sp->pp_alivecnt = 0; 4692 4693 /* we are down, close all open protocols */ 4694 lcp.Close(sp); 4695 4696 /* And now prepare LCP to reestablish the link, if configured to do so. */ 4697 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 4698 4699 /* Close connection imediatly, completition of this 4700 * will summon the magic needed to reestablish it. */ 4701 if (sp->pp_tlf) 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 Mon Sep 29 03:10:08 GMT 2025