if_spppsubr.c revision 1.46
1 /* $NetBSD: if_spppsubr.c,v 1.46 2002/04/29 16:29:29 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 * This software is distributed with NO WARRANTIES, not even the implied 17 * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 18 * 19 * Authors grant any other persons or organisations permission to use 20 * or modify this software as long as this message is kept with the software, 21 * all derivative works or modified versions. 22 * 23 * From: Version 2.4, Thu Apr 30 17:17:21 MSD 1997 24 * 25 * From: if_spppsubr.c,v 1.39 1998/04/04 13:26:03 phk Exp 26 * 27 * From: Id: if_spppsubr.c,v 1.23 1999/02/23 14:47:50 hm Exp 28 */ 29 30 #include <sys/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: if_spppsubr.c,v 1.46 2002/04/29 16:29:29 martin Exp $"); 32 33 #include "opt_inet.h" 34 #include "opt_ipx.h" 35 #include "opt_iso.h" 36 #include "opt_ns.h" 37 38 #include <sys/param.h> 39 #include <sys/proc.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/sockio.h> 43 #include <sys/socket.h> 44 #include <sys/syslog.h> 45 #include <sys/malloc.h> 46 #include <sys/mbuf.h> 47 #include <sys/callout.h> 48 #include <sys/md5.h> 49 50 #include <net/if.h> 51 #include <net/netisr.h> 52 #include <net/if_types.h> 53 #include <net/route.h> 54 #include <net/ppp_defs.h> 55 56 #include <machine/stdarg.h> 57 58 #include <netinet/in.h> 59 #include <netinet/in_systm.h> 60 #include <netinet/in_var.h> 61 #ifdef INET 62 #include <netinet/ip.h> 63 #include <netinet/tcp.h> 64 #endif 65 #include <net/ethertypes.h> 66 67 #ifdef IPX 68 #include <netipx/ipx.h> 69 #include <netipx/ipx_if.h> 70 #endif 71 72 #ifdef NS 73 #include <netns/ns.h> 74 #include <netns/ns_if.h> 75 #endif 76 77 #ifdef ISO 78 #include <netiso/argo_debug.h> 79 #include <netiso/iso.h> 80 #include <netiso/iso_var.h> 81 #include <netiso/iso_snpac.h> 82 #endif 83 84 #include <net/if_sppp.h> 85 #include <net/if_spppvar.h> 86 87 #define MAXALIVECNT 3 /* max. alive packets */ 88 #define DEFAULT_MAX_AUTH_FAILURES 5 /* max. auth. failures */ 89 90 /* 91 * Interface flags that can be set in an ifconfig command. 92 * 93 * Setting link0 will make the link passive, i.e. it will be marked 94 * as being administrative openable, but won't be opened to begin 95 * with. Incoming calls will be answered, or subsequent calls with 96 * -link1 will cause the administrative open of the LCP layer. 97 * 98 * Setting link1 will cause the link to auto-dial only as packets 99 * arrive to be sent. 100 * 101 * Setting IFF_DEBUG will syslog the option negotiation and state 102 * transitions at level kern.debug. Note: all logs consistently look 103 * like 104 * 105 * <if-name><unit>: <proto-name> <additional info...> 106 * 107 * with <if-name><unit> being something like "bppp0", and <proto-name> 108 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc. 109 */ 110 111 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ 112 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */ 113 114 #define CONF_REQ 1 /* PPP configure request */ 115 #define CONF_ACK 2 /* PPP configure acknowledge */ 116 #define CONF_NAK 3 /* PPP configure negative ack */ 117 #define CONF_REJ 4 /* PPP configure reject */ 118 #define TERM_REQ 5 /* PPP terminate request */ 119 #define TERM_ACK 6 /* PPP terminate acknowledge */ 120 #define CODE_REJ 7 /* PPP code reject */ 121 #define PROTO_REJ 8 /* PPP protocol reject */ 122 #define ECHO_REQ 9 /* PPP echo request */ 123 #define ECHO_REPLY 10 /* PPP echo reply */ 124 #define DISC_REQ 11 /* PPP discard request */ 125 126 #define LCP_OPT_MRU 1 /* maximum receive unit */ 127 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */ 128 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ 129 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ 130 #define LCP_OPT_MAGIC 5 /* magic number */ 131 #define LCP_OPT_RESERVED 6 /* reserved */ 132 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ 133 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ 134 135 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ 136 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol */ 137 #define IPCP_OPT_ADDRESS 3 /* local IP address */ 138 #define IPCP_OPT_PRIMDNS 129 /* primary remote dns address */ 139 #define IPCP_OPT_SECDNS 131 /* secondary remote dns address */ 140 141 #define IPV6CP_OPT_IFID 1 /* interface identifier */ 142 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ 143 144 #define PAP_REQ 1 /* PAP name/password request */ 145 #define PAP_ACK 2 /* PAP acknowledge */ 146 #define PAP_NAK 3 /* PAP fail */ 147 148 #define CHAP_CHALLENGE 1 /* CHAP challenge request */ 149 #define CHAP_RESPONSE 2 /* CHAP challenge response */ 150 #define CHAP_SUCCESS 3 /* CHAP response ok */ 151 #define CHAP_FAILURE 4 /* CHAP response failed */ 152 153 #define CHAP_MD5 5 /* hash algorithm - MD5 */ 154 155 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */ 156 #define CISCO_UNICAST 0x0f /* Cisco unicast address */ 157 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ 158 #define CISCO_ADDR_REQ 0 /* Cisco address request */ 159 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */ 160 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ 161 162 /* states are named and numbered according to RFC 1661 */ 163 #define STATE_INITIAL 0 164 #define STATE_STARTING 1 165 #define STATE_CLOSED 2 166 #define STATE_STOPPED 3 167 #define STATE_CLOSING 4 168 #define STATE_STOPPING 5 169 #define STATE_REQ_SENT 6 170 #define STATE_ACK_RCVD 7 171 #define STATE_ACK_SENT 8 172 #define STATE_OPENED 9 173 174 struct ppp_header { 175 u_char address; 176 u_char control; 177 u_short protocol; 178 } __attribute__((__packed__)); 179 #define PPP_HEADER_LEN sizeof (struct ppp_header) 180 181 struct lcp_header { 182 u_char type; 183 u_char ident; 184 u_short len; 185 } __attribute__((__packed__)); 186 #define LCP_HEADER_LEN sizeof (struct lcp_header) 187 188 struct cisco_packet { 189 u_int32_t type; 190 u_int32_t par1; 191 u_int32_t par2; 192 u_short rel; 193 u_short time0; 194 u_short time1; 195 } __attribute__((__packed__)); 196 #define CISCO_PACKET_LEN 18 197 198 /* 199 * We follow the spelling and capitalization of RFC 1661 here, to make 200 * it easier comparing with the standard. Please refer to this RFC in 201 * case you can't make sense out of these abbreviation; it will also 202 * explain the semantics related to the various events and actions. 203 */ 204 struct cp { 205 u_short proto; /* PPP control protocol number */ 206 u_char protoidx; /* index into state table in struct sppp */ 207 u_char flags; 208 #define CP_LCP 0x01 /* this is the LCP */ 209 #define CP_AUTH 0x02 /* this is an authentication protocol */ 210 #define CP_NCP 0x04 /* this is a NCP */ 211 #define CP_QUAL 0x08 /* this is a quality reporting protocol */ 212 const char *name; /* name of this control protocol */ 213 /* event handlers */ 214 void (*Up)(struct sppp *sp); 215 void (*Down)(struct sppp *sp); 216 void (*Open)(struct sppp *sp); 217 void (*Close)(struct sppp *sp); 218 void (*TO)(void *sp); 219 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len); 220 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len); 221 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len); 222 /* actions */ 223 void (*tlu)(struct sppp *sp); 224 void (*tld)(struct sppp *sp); 225 void (*tls)(struct sppp *sp); 226 void (*tlf)(struct sppp *sp); 227 void (*scr)(struct sppp *sp); 228 }; 229 230 static struct sppp *spppq; 231 static struct callout keepalive_ch; 232 233 #ifdef __FreeBSD__ 234 #define SPP_FMT "%s%d: " 235 #define SPP_ARGS(ifp) (ifp)->if_name, (ifp)->if_unit 236 #else 237 #define SPP_FMT "%s: " 238 #define SPP_ARGS(ifp) (ifp)->if_xname 239 #endif 240 241 #ifdef INET 242 /* 243 * The following disgusting hack gets around the problem that IP TOS 244 * can't be set yet. We want to put "interactive" traffic on a high 245 * priority queue. To decide if traffic is interactive, we check that 246 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 247 * 248 * XXX is this really still necessary? - joerg - 249 */ 250 static u_short interactive_ports[8] = { 251 0, 513, 0, 0, 252 0, 21, 0, 23, 253 }; 254 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 255 #endif 256 257 /* almost every function needs these */ 258 #define STDDCL \ 259 struct ifnet *ifp = &sp->pp_if; \ 260 int debug = ifp->if_flags & IFF_DEBUG 261 262 static int sppp_output(struct ifnet *ifp, struct mbuf *m, 263 struct sockaddr *dst, struct rtentry *rt); 264 265 static void sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2); 266 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m); 267 268 static void sppp_cp_input(const struct cp *cp, struct sppp *sp, 269 struct mbuf *m); 270 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 271 u_char ident, u_short len, void *data); 272 /* static void sppp_cp_timeout(void *arg); */ 273 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp, 274 int newstate); 275 static void sppp_auth_send(const struct cp *cp, 276 struct sppp *sp, unsigned int type, unsigned int id, 277 ...); 278 279 static void sppp_up_event(const struct cp *cp, struct sppp *sp); 280 static void sppp_down_event(const struct cp *cp, struct sppp *sp); 281 static void sppp_open_event(const struct cp *cp, struct sppp *sp); 282 static void sppp_close_event(const struct cp *cp, struct sppp *sp); 283 static void sppp_to_event(const struct cp *cp, struct sppp *sp); 284 285 static void sppp_null(struct sppp *sp); 286 287 static void sppp_lcp_init(struct sppp *sp); 288 static void sppp_lcp_up(struct sppp *sp); 289 static void sppp_lcp_down(struct sppp *sp); 290 static void sppp_lcp_open(struct sppp *sp); 291 static void sppp_lcp_close(struct sppp *sp); 292 static void sppp_lcp_TO(void *sp); 293 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 294 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 295 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 296 static void sppp_lcp_tlu(struct sppp *sp); 297 static void sppp_lcp_tld(struct sppp *sp); 298 static void sppp_lcp_tls(struct sppp *sp); 299 static void sppp_lcp_tlf(struct sppp *sp); 300 static void sppp_lcp_scr(struct sppp *sp); 301 static void sppp_lcp_check_and_close(struct sppp *sp); 302 static int sppp_ncp_check(struct sppp *sp); 303 304 static void sppp_ipcp_init(struct sppp *sp); 305 static void sppp_ipcp_up(struct sppp *sp); 306 static void sppp_ipcp_down(struct sppp *sp); 307 static void sppp_ipcp_open(struct sppp *sp); 308 static void sppp_ipcp_close(struct sppp *sp); 309 static void sppp_ipcp_TO(void *sp); 310 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 311 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 312 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 313 static void sppp_ipcp_tlu(struct sppp *sp); 314 static void sppp_ipcp_tld(struct sppp *sp); 315 static void sppp_ipcp_tls(struct sppp *sp); 316 static void sppp_ipcp_tlf(struct sppp *sp); 317 static void sppp_ipcp_scr(struct sppp *sp); 318 319 static void sppp_ipv6cp_init(struct sppp *sp); 320 static void sppp_ipv6cp_up(struct sppp *sp); 321 static void sppp_ipv6cp_down(struct sppp *sp); 322 static void sppp_ipv6cp_open(struct sppp *sp); 323 static void sppp_ipv6cp_close(struct sppp *sp); 324 static void sppp_ipv6cp_TO(void *sp); 325 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len); 326 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 327 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 328 static void sppp_ipv6cp_tlu(struct sppp *sp); 329 static void sppp_ipv6cp_tld(struct sppp *sp); 330 static void sppp_ipv6cp_tls(struct sppp *sp); 331 static void sppp_ipv6cp_tlf(struct sppp *sp); 332 static void sppp_ipv6cp_scr(struct sppp *sp); 333 334 static void sppp_pap_input(struct sppp *sp, struct mbuf *m); 335 static void sppp_pap_init(struct sppp *sp); 336 static void sppp_pap_open(struct sppp *sp); 337 static void sppp_pap_close(struct sppp *sp); 338 static void sppp_pap_TO(void *sp); 339 static void sppp_pap_my_TO(void *sp); 340 static void sppp_pap_tlu(struct sppp *sp); 341 static void sppp_pap_tld(struct sppp *sp); 342 static void sppp_pap_scr(struct sppp *sp); 343 344 static void sppp_chap_input(struct sppp *sp, struct mbuf *m); 345 static void sppp_chap_init(struct sppp *sp); 346 static void sppp_chap_open(struct sppp *sp); 347 static void sppp_chap_close(struct sppp *sp); 348 static void sppp_chap_TO(void *sp); 349 static void sppp_chap_tlu(struct sppp *sp); 350 static void sppp_chap_tld(struct sppp *sp); 351 static void sppp_chap_scr(struct sppp *sp); 352 353 static const char *sppp_auth_type_name(u_short proto, u_char type); 354 static const char *sppp_cp_type_name(u_char type); 355 static const char *sppp_dotted_quad(u_int32_t addr); 356 static const char *sppp_ipcp_opt_name(u_char opt); 357 #ifdef INET6 358 static const char *sppp_ipv6cp_opt_name(u_char opt); 359 #endif 360 static const char *sppp_lcp_opt_name(u_char opt); 361 static const char *sppp_phase_name(int phase); 362 static const char *sppp_proto_name(u_short proto); 363 static const char *sppp_state_name(int state); 364 static int sppp_params(struct sppp *sp, int cmd, void *data); 365 static void sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, 366 u_int32_t *srcmask); 367 static void sppp_keepalive(void *dummy); 368 static void sppp_phase_network(struct sppp *sp); 369 static void sppp_print_bytes(const u_char *p, u_short len); 370 static void sppp_print_string(const char *p, u_short len); 371 static void sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr); 372 static void sppp_clear_ip_addrs(struct sppp *sp); 373 #ifdef INET6 374 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, 375 struct in6_addr *dst, struct in6_addr *srcmask); 376 #ifdef IPV6CP_MYIFID_DYN 377 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src); 378 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src); 379 #endif 380 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src); 381 #endif 382 383 /* our control protocol descriptors */ 384 static const struct cp lcp = { 385 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 386 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close, 387 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak, 388 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf, 389 sppp_lcp_scr 390 }; 391 392 static const struct cp ipcp = { 393 PPP_IPCP, IDX_IPCP, 394 #ifdef INET 395 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 396 #else 397 0, 398 #endif 399 "ipcp", 400 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close, 401 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak, 402 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf, 403 sppp_ipcp_scr 404 }; 405 406 static const struct cp ipv6cp = { 407 PPP_IPV6CP, IDX_IPV6CP, 408 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 409 CP_NCP, 410 #else 411 0, 412 #endif 413 "ipv6cp", 414 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close, 415 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak, 416 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf, 417 sppp_ipv6cp_scr 418 }; 419 420 static const struct cp pap = { 421 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 422 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close, 423 sppp_pap_TO, 0, 0, 0, 424 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null, 425 sppp_pap_scr 426 }; 427 428 static const struct cp chap = { 429 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 430 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close, 431 sppp_chap_TO, 0, 0, 0, 432 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null, 433 sppp_chap_scr 434 }; 435 436 static const struct cp *cps[IDX_COUNT] = { 437 &lcp, /* IDX_LCP */ 438 &ipcp, /* IDX_IPCP */ 439 &ipv6cp, /* IDX_IPV6CP */ 440 &pap, /* IDX_PAP */ 441 &chap, /* IDX_CHAP */ 442 }; 443 444 445 /* 446 * Exported functions, comprising our interface to the lower layer. 447 */ 448 449 /* 450 * Process the received packet. 451 */ 452 void 453 sppp_input(struct ifnet *ifp, struct mbuf *m) 454 { 455 struct ppp_header *h = NULL; 456 struct ifqueue *inq = 0; 457 u_int16_t protocol; 458 int s; 459 struct sppp *sp = (struct sppp *)ifp; 460 int debug = ifp->if_flags & IFF_DEBUG; 461 462 if (ifp->if_flags & IFF_UP) 463 /* Count received bytes, add hardware framing */ 464 ifp->if_ibytes += m->m_pkthdr.len + sp->pp_framebytes; 465 466 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 467 /* Too small packet, drop it. */ 468 if (debug) 469 log(LOG_DEBUG, 470 SPP_FMT "input packet is too small, %d bytes\n", 471 SPP_ARGS(ifp), m->m_pkthdr.len); 472 drop: 473 ++ifp->if_ierrors; 474 ++ifp->if_iqdrops; 475 m_freem (m); 476 return; 477 } 478 479 if (sp->pp_flags & PP_NOFRAMING) { 480 memcpy(&protocol, mtod(m, void *), 2); 481 protocol = ntohs(protocol); 482 m_adj(m, 2); 483 } else { 484 485 /* Get PPP header. */ 486 h = mtod (m, struct ppp_header*); 487 m_adj (m, PPP_HEADER_LEN); 488 489 switch (h->address) { 490 case PPP_ALLSTATIONS: 491 if (h->control != PPP_UI) 492 goto invalid; 493 if (sp->pp_flags & PP_CISCO) { 494 if (debug) 495 log(LOG_DEBUG, 496 SPP_FMT "PPP packet in Cisco mode " 497 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 498 SPP_ARGS(ifp), 499 h->address, h->control, ntohs(h->protocol)); 500 goto drop; 501 } 502 break; 503 case CISCO_MULTICAST: 504 case CISCO_UNICAST: 505 /* Don't check the control field here (RFC 1547). */ 506 if (! (sp->pp_flags & PP_CISCO)) { 507 if (debug) 508 log(LOG_DEBUG, 509 SPP_FMT "Cisco packet in PPP mode " 510 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 511 SPP_ARGS(ifp), 512 h->address, h->control, ntohs(h->protocol)); 513 goto drop; 514 } 515 switch (ntohs (h->protocol)) { 516 default: 517 ++ifp->if_noproto; 518 goto invalid; 519 case CISCO_KEEPALIVE: 520 sppp_cisco_input ((struct sppp*) ifp, m); 521 m_freem (m); 522 return; 523 #ifdef INET 524 case ETHERTYPE_IP: 525 schednetisr (NETISR_IP); 526 inq = &ipintrq; 527 break; 528 #endif 529 #ifdef INET6 530 case ETHERTYPE_IPV6: 531 schednetisr (NETISR_IPV6); 532 inq = &ip6intrq; 533 break; 534 #endif 535 #ifdef IPX 536 case ETHERTYPE_IPX: 537 schednetisr (NETISR_IPX); 538 inq = &ipxintrq; 539 break; 540 #endif 541 #ifdef NS 542 case ETHERTYPE_NS: 543 schednetisr (NETISR_NS); 544 inq = &nsintrq; 545 break; 546 #endif 547 } 548 goto queue_pkt; 549 default: /* Invalid PPP packet. */ 550 invalid: 551 if (debug) 552 log(LOG_DEBUG, 553 SPP_FMT "invalid input packet " 554 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 555 SPP_ARGS(ifp), 556 h->address, h->control, ntohs(h->protocol)); 557 goto drop; 558 } 559 protocol = ntohs (h->protocol); 560 } 561 562 switch (protocol) { 563 default: 564 if (sp->state[IDX_LCP] == STATE_OPENED) { 565 u_int16_t prot = htons(protocol); 566 sppp_cp_send (sp, PPP_LCP, PROTO_REJ, 567 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2, 568 &prot); 569 } 570 if (debug) 571 log(LOG_DEBUG, 572 SPP_FMT "invalid input protocol " 573 "<proto=0x%x>\n", SPP_ARGS(ifp), ntohs(protocol)); 574 ++ifp->if_noproto; 575 goto drop; 576 case PPP_LCP: 577 sppp_cp_input(&lcp, sp, m); 578 m_freem (m); 579 return; 580 case PPP_PAP: 581 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 582 sppp_pap_input(sp, m); 583 m_freem (m); 584 return; 585 case PPP_CHAP: 586 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 587 sppp_chap_input(sp, m); 588 m_freem (m); 589 return; 590 #ifdef INET 591 case PPP_IPCP: 592 if (sp->pp_phase == SPPP_PHASE_NETWORK) 593 sppp_cp_input(&ipcp, sp, m); 594 m_freem (m); 595 return; 596 case PPP_IP: 597 if (sp->state[IDX_IPCP] == STATE_OPENED) { 598 schednetisr (NETISR_IP); 599 inq = &ipintrq; 600 sp->pp_last_activity = time.tv_sec; 601 } 602 break; 603 #endif 604 #ifdef INET6 605 case PPP_IPV6CP: 606 if (sp->pp_phase == SPPP_PHASE_NETWORK) 607 sppp_cp_input(&ipv6cp, sp, m); 608 m_freem (m); 609 return; 610 611 case PPP_IPV6: 612 if (sp->state[IDX_IPV6CP] == STATE_OPENED) { 613 schednetisr (NETISR_IPV6); 614 inq = &ip6intrq; 615 sp->pp_last_activity = time.tv_sec; 616 } 617 break; 618 #endif 619 #ifdef IPX 620 case PPP_IPX: 621 /* IPX IPXCP not implemented yet */ 622 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 623 schednetisr (NETISR_IPX); 624 inq = &ipxintrq; 625 } 626 break; 627 #endif 628 #ifdef NS 629 case PPP_XNS: 630 /* XNS IDPCP not implemented yet */ 631 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 632 schednetisr (NETISR_NS); 633 inq = &nsintrq; 634 } 635 break; 636 #endif 637 #ifdef ISO 638 case PPP_ISO: 639 /* OSI NLCP not implemented yet */ 640 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 641 schednetisr (NETISR_ISO); 642 inq = &clnlintrq; 643 } 644 break; 645 #endif 646 } 647 648 queue_pkt: 649 if (! (ifp->if_flags & IFF_UP) || ! inq) 650 goto drop; 651 652 /* Check queue. */ 653 s = splnet(); 654 if (IF_QFULL (inq)) { 655 /* Queue overflow. */ 656 IF_DROP(inq); 657 splx(s); 658 if (debug) 659 log(LOG_DEBUG, SPP_FMT "protocol queue overflow\n", 660 SPP_ARGS(ifp)); 661 goto drop; 662 } 663 IF_ENQUEUE(inq, m); 664 splx(s); 665 } 666 667 /* 668 * Enqueue transmit packet. 669 */ 670 static int 671 sppp_output(struct ifnet *ifp, struct mbuf *m, 672 struct sockaddr *dst, struct rtentry *rt) 673 { 674 struct sppp *sp = (struct sppp*) ifp; 675 struct ppp_header *h = NULL; 676 struct ifqueue *ifq = NULL; /* XXX */ 677 int s, len, rv = 0; 678 u_int16_t protocol; 679 ALTQ_DECL(struct altq_pktattr pktattr;) 680 681 s = splnet(); 682 683 sp->pp_last_activity = time.tv_sec; 684 685 if ((ifp->if_flags & IFF_UP) == 0 || 686 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 687 m_freem (m); 688 splx (s); 689 return (ENETDOWN); 690 } 691 692 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 693 /* 694 * Interface is not yet running, but auto-dial. Need 695 * to start LCP for it. 696 */ 697 ifp->if_flags |= IFF_RUNNING; 698 splx(s); 699 lcp.Open(sp); 700 s = splnet(); 701 } 702 703 /* 704 * If the queueing discipline needs packet classification, 705 * do it before prepending link headers. 706 */ 707 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family, &pktattr); 708 709 #ifdef INET 710 if (dst->sa_family == AF_INET) 711 { 712 /* Check mbuf length here??? */ 713 struct ip *ip = mtod (m, struct ip*); 714 struct tcphdr *tcp = (struct tcphdr*) ((int32_t*)ip + ip->ip_hl); 715 716 /* 717 * When using dynamic local IP address assignment by using 718 * 0.0.0.0 as a local address, the first TCP session will 719 * not connect because the local TCP checksum is computed 720 * using 0.0.0.0 which will later become our real IP address 721 * so the TCP checksum computed at the remote end will 722 * become invalid. So we 723 * - don't let packets with src ip addr 0 thru 724 * - we flag TCP packets with src ip 0 as an error 725 */ 726 727 if(ip->ip_src.s_addr == INADDR_ANY) /* -hm */ 728 { 729 m_freem(m); 730 splx(s); 731 if(ip->ip_p == IPPROTO_TCP) 732 return(EADDRNOTAVAIL); 733 else 734 return(0); 735 } 736 737 /* 738 * Put low delay, telnet, rlogin and ftp control packets 739 * in front of the queue. 740 */ 741 742 if (! IF_QFULL (&sp->pp_fastq) && 743 ((ip->ip_tos & IPTOS_LOWDELAY) || 744 ((ip->ip_p == IPPROTO_TCP && 745 m->m_len >= sizeof (struct ip) + sizeof (struct tcphdr) && 746 (INTERACTIVE (ntohs (tcp->th_sport)))) || 747 INTERACTIVE (ntohs (tcp->th_dport))))) 748 ifq = &sp->pp_fastq; 749 } 750 #endif 751 752 #ifdef INET6 753 if (dst->sa_family == AF_INET6) { 754 /* XXX do something tricky here? */ 755 } 756 #endif 757 758 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 759 /* 760 * Prepend general data packet PPP header. For now, IP only. 761 */ 762 M_PREPEND (m, PPP_HEADER_LEN, M_DONTWAIT); 763 if (! m) { 764 if (ifp->if_flags & IFF_DEBUG) 765 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 766 SPP_ARGS(ifp)); 767 ++ifp->if_oerrors; 768 splx (s); 769 return (ENOBUFS); 770 } 771 /* 772 * May want to check size of packet 773 * (albeit due to the implementation it's always enough) 774 */ 775 h = mtod (m, struct ppp_header*); 776 if (sp->pp_flags & PP_CISCO) { 777 h->address = CISCO_UNICAST; /* unicast address */ 778 h->control = 0; 779 } else { 780 h->address = PPP_ALLSTATIONS; /* broadcast address */ 781 h->control = PPP_UI; /* Unnumbered Info */ 782 } 783 } 784 785 switch (dst->sa_family) { 786 #ifdef INET 787 case AF_INET: /* Internet Protocol */ 788 if (sp->pp_flags & PP_CISCO) 789 protocol = htons (ETHERTYPE_IP); 790 else { 791 /* 792 * Don't choke with an ENETDOWN early. It's 793 * possible that we just started dialing out, 794 * so don't drop the packet immediately. If 795 * we notice that we run out of buffer space 796 * below, we will however remember that we are 797 * not ready to carry IP packets, and return 798 * ENETDOWN, as opposed to ENOBUFS. 799 */ 800 protocol = htons(PPP_IP); 801 if (sp->state[IDX_IPCP] != STATE_OPENED) 802 rv = ENETDOWN; 803 } 804 break; 805 #endif 806 #ifdef INET6 807 case AF_INET6: /* Internet Protocol version 6 */ 808 if (sp->pp_flags & PP_CISCO) 809 protocol = htons (ETHERTYPE_IPV6); 810 else { 811 /* 812 * Don't choke with an ENETDOWN early. It's 813 * possible that we just started dialing out, 814 * so don't drop the packet immediately. If 815 * we notice that we run out of buffer space 816 * below, we will however remember that we are 817 * not ready to carry IP packets, and return 818 * ENETDOWN, as opposed to ENOBUFS. 819 */ 820 protocol = htons(PPP_IPV6); 821 if (sp->state[IDX_IPV6CP] != STATE_OPENED) 822 rv = ENETDOWN; 823 } 824 break; 825 #endif 826 #ifdef NS 827 case AF_NS: /* Xerox NS Protocol */ 828 protocol = htons ((sp->pp_flags & PP_CISCO) ? 829 ETHERTYPE_NS : PPP_XNS); 830 break; 831 #endif 832 #ifdef IPX 833 case AF_IPX: /* Novell IPX Protocol */ 834 protocol = htons ((sp->pp_flags & PP_CISCO) ? 835 ETHERTYPE_IPX : PPP_IPX); 836 break; 837 #endif 838 #ifdef ISO 839 case AF_ISO: /* ISO OSI Protocol */ 840 if (sp->pp_flags & PP_CISCO) 841 goto nosupport; 842 protocol = htons (PPP_ISO); 843 break; 844 nosupport: 845 #endif 846 default: 847 m_freem (m); 848 ++ifp->if_oerrors; 849 splx (s); 850 return (EAFNOSUPPORT); 851 } 852 853 if (sp->pp_flags & PP_NOFRAMING) { 854 M_PREPEND (m, 2, M_DONTWAIT); 855 if (m == NULL) { 856 if (ifp->if_flags & IFF_DEBUG) 857 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 858 SPP_ARGS(ifp)); 859 ++ifp->if_oerrors; 860 splx (s); 861 return (ENOBUFS); 862 } 863 *mtod(m, u_int16_t*) = protocol; 864 } else { 865 h->protocol = protocol; 866 } 867 868 /* 869 * Queue message on interface, and start output if interface 870 * not yet active. 871 */ 872 len = m->m_pkthdr.len; 873 if (ifq != NULL 874 #ifdef ALTQ 875 && ALTQ_IS_ENABLED(&ifp->if_snd) == 0 876 #endif 877 ) { 878 if (IF_QFULL (ifq)) { 879 IF_DROP (&ifp->if_snd); 880 m_freem (m); 881 if (rv == 0) 882 rv = ENOBUFS; 883 } 884 IF_ENQUEUE(ifq, m); 885 } else 886 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, rv); 887 if (rv != 0) { 888 ++ifp->if_oerrors; 889 splx(s); 890 return (rv); 891 } 892 893 if (! (ifp->if_flags & IFF_OACTIVE)) 894 (*ifp->if_start) (ifp); 895 896 /* 897 * Count output packets and bytes. 898 * The packet length includes header + additional hardware framing 899 * according to RFC 1333. 900 */ 901 ifp->if_obytes += len + sp->pp_framebytes; 902 splx (s); 903 return (0); 904 } 905 906 void 907 sppp_attach(struct ifnet *ifp) 908 { 909 struct sppp *sp = (struct sppp*) ifp; 910 911 /* Initialize keepalive handler. */ 912 if (! spppq) { 913 callout_init(&keepalive_ch); 914 callout_reset(&keepalive_ch, hz * 10, sppp_keepalive, NULL); 915 } 916 917 /* Insert new entry into the keepalive list. */ 918 sp->pp_next = spppq; 919 spppq = sp; 920 921 sp->pp_if.if_type = IFT_PPP; 922 sp->pp_if.if_output = sppp_output; 923 sp->pp_fastq.ifq_maxlen = 32; 924 sp->pp_cpq.ifq_maxlen = 20; 925 sp->pp_loopcnt = 0; 926 sp->pp_alivecnt = 0; 927 sp->pp_last_activity = 0; 928 sp->pp_idle_timeout = 0; 929 memset(&sp->pp_seq[0], 0, sizeof(sp->pp_seq)); 930 memset(&sp->pp_rseq[0], 0, sizeof(sp->pp_rseq)); 931 sp->pp_auth_failures = 0; 932 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 933 sp->pp_phase = SPPP_PHASE_DEAD; 934 sp->pp_up = lcp.Up; 935 sp->pp_down = lcp.Down; 936 937 if_alloc_sadl(ifp); 938 939 memset(&sp->myauth, 0, sizeof sp->myauth); 940 memset(&sp->hisauth, 0, sizeof sp->hisauth); 941 sppp_lcp_init(sp); 942 sppp_ipcp_init(sp); 943 sppp_ipv6cp_init(sp); 944 sppp_pap_init(sp); 945 sppp_chap_init(sp); 946 } 947 948 void 949 sppp_detach(struct ifnet *ifp) 950 { 951 struct sppp **q, *p, *sp = (struct sppp*) ifp; 952 int i; 953 954 /* Remove the entry from the keepalive list. */ 955 for (q = &spppq; (p = *q); q = &p->pp_next) 956 if (p == sp) { 957 *q = p->pp_next; 958 break; 959 } 960 961 /* Stop keepalive handler. */ 962 if (! spppq) { 963 callout_stop(&keepalive_ch); 964 } 965 966 for (i = 0; i < IDX_COUNT; i++) { 967 callout_stop(&sp->ch[i]); 968 } 969 callout_stop(&sp->pap_my_to_ch); 970 971 /* free authentication info */ 972 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 973 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 974 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 975 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 976 977 if_free_sadl(ifp); 978 } 979 980 /* 981 * Flush the interface output queue. 982 */ 983 void 984 sppp_flush(struct ifnet *ifp) 985 { 986 struct sppp *sp = (struct sppp*) ifp; 987 988 IFQ_PURGE (&sp->pp_if.if_snd); 989 IF_PURGE (&sp->pp_fastq); 990 IF_PURGE (&sp->pp_cpq); 991 } 992 993 /* 994 * Check if the output queue is empty. 995 */ 996 int 997 sppp_isempty(struct ifnet *ifp) 998 { 999 struct sppp *sp = (struct sppp*) ifp; 1000 int empty, s; 1001 1002 s = splnet(); 1003 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1004 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1005 splx(s); 1006 return (empty); 1007 } 1008 1009 /* 1010 * Get next packet to send. 1011 */ 1012 struct mbuf * 1013 sppp_dequeue(struct ifnet *ifp) 1014 { 1015 struct sppp *sp = (struct sppp*) ifp; 1016 struct mbuf *m; 1017 int s; 1018 1019 s = splnet(); 1020 /* 1021 * Process only the control protocol queue until we have at 1022 * least one NCP open. 1023 * 1024 * Do always serve all three queues in Cisco mode. 1025 */ 1026 IF_DEQUEUE(&sp->pp_cpq, m); 1027 if (m == NULL && 1028 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { 1029 IF_DEQUEUE(&sp->pp_fastq, m); 1030 if (m == NULL) 1031 IF_DEQUEUE (&sp->pp_if.if_snd, m); 1032 } 1033 splx(s); 1034 return m; 1035 } 1036 1037 /* 1038 * Pick the next packet, do not remove it from the queue. 1039 */ 1040 struct mbuf * 1041 sppp_pick(struct ifnet *ifp) 1042 { 1043 struct sppp *sp = (struct sppp*)ifp; 1044 struct mbuf *m; 1045 int s; 1046 1047 s= splnet (); 1048 1049 m = sp->pp_cpq.ifq_head; 1050 if (m == NULL && 1051 (sp->pp_phase == SPPP_PHASE_NETWORK || 1052 (sp->pp_flags & PP_CISCO) != 0)) 1053 if ((m = sp->pp_fastq.ifq_head) == NULL) 1054 m = sp->pp_if.if_snd.ifq_head; 1055 splx (s); 1056 return (m); 1057 } 1058 1059 /* 1060 * Process an ioctl request. Called on low priority level. 1061 */ 1062 int 1063 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1064 { 1065 struct ifreq *ifr = (struct ifreq*) data; 1066 struct sppp *sp = (struct sppp*) ifp; 1067 int s, error=0, going_up, going_down, newmode; 1068 1069 s = splnet(); 1070 switch (cmd) { 1071 case SIOCAIFADDR: 1072 case SIOCSIFDSTADDR: 1073 break; 1074 1075 case SIOCSIFADDR: 1076 if_up(ifp); 1077 /* fall through... */ 1078 1079 case SIOCSIFFLAGS: 1080 going_up = ifp->if_flags & IFF_UP && 1081 (ifp->if_flags & IFF_RUNNING) == 0; 1082 going_down = (ifp->if_flags & IFF_UP) == 0 && 1083 ifp->if_flags & IFF_RUNNING; 1084 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1085 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1086 /* sanity */ 1087 newmode = IFF_PASSIVE; 1088 ifp->if_flags &= ~IFF_AUTO; 1089 } 1090 1091 if (going_up || going_down) 1092 lcp.Close(sp); 1093 if (going_up && newmode == 0) { 1094 /* neither auto-dial nor passive */ 1095 ifp->if_flags |= IFF_RUNNING; 1096 if (!(sp->pp_flags & PP_CISCO)) 1097 lcp.Open(sp); 1098 } else if (going_down) { 1099 sppp_flush(ifp); 1100 ifp->if_flags &= ~IFF_RUNNING; 1101 } 1102 1103 break; 1104 1105 #ifdef SIOCSIFMTU 1106 #ifndef ifr_mtu 1107 #define ifr_mtu ifr_metric 1108 #endif 1109 case SIOCSIFMTU: 1110 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru) 1111 return (EINVAL); 1112 ifp->if_mtu = ifr->ifr_mtu; 1113 break; 1114 #endif 1115 #ifdef SLIOCSETMTU 1116 case SLIOCSETMTU: 1117 if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru) 1118 return (EINVAL); 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 SPPPSETLCPCFG: 1138 case SPPPSETIDLETO: 1139 case SPPPSETAUTHFAILURE: 1140 case SPPPSETDNSOPTS: 1141 { 1142 struct proc *p = curproc; /* XXX */ 1143 1144 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1145 break; 1146 } 1147 /* FALLTHROUGH */ 1148 case SPPPGETAUTHCFG: 1149 case SPPPGETLCPCFG: 1150 case SPPPGETSTATUS: 1151 case SPPPGETIDLETO: 1152 case SPPPGETAUTHFAILURES: 1153 case SPPPGETDNSOPTS: 1154 case SPPPGETDNSADDRS: 1155 error = sppp_params(sp, cmd, data); 1156 break; 1157 1158 default: 1159 error = ENOTTY; 1160 } 1161 splx(s); 1162 return (error); 1163 } 1164 1165 1166 /* 1167 * Cisco framing implementation. 1168 */ 1169 1170 /* 1171 * Handle incoming Cisco keepalive protocol packets. 1172 */ 1173 static void 1174 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1175 { 1176 STDDCL; 1177 struct cisco_packet *h; 1178 u_int32_t me, mymask; 1179 1180 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1181 if (debug) 1182 log(LOG_DEBUG, 1183 SPP_FMT "cisco invalid packet length: %d bytes\n", 1184 SPP_ARGS(ifp), m->m_pkthdr.len); 1185 return; 1186 } 1187 h = mtod (m, struct cisco_packet*); 1188 if (debug) 1189 log(LOG_DEBUG, 1190 SPP_FMT "cisco input: %d bytes " 1191 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1192 SPP_ARGS(ifp), m->m_pkthdr.len, 1193 ntohl (h->type), h->par1, h->par2, (u_int)h->rel, 1194 (u_int)h->time0, (u_int)h->time1); 1195 switch (ntohl (h->type)) { 1196 default: 1197 if (debug) 1198 addlog(SPP_FMT "cisco unknown packet type: 0x%x\n", 1199 SPP_ARGS(ifp), ntohl (h->type)); 1200 break; 1201 case CISCO_ADDR_REPLY: 1202 /* Reply on address request, ignore */ 1203 break; 1204 case CISCO_KEEPALIVE_REQ: 1205 sp->pp_alivecnt = 0; 1206 sp->pp_rseq[IDX_LCP] = ntohl (h->par1); 1207 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 1208 /* Local and remote sequence numbers are equal. 1209 * Probably, the line is in loopback mode. */ 1210 if (sp->pp_loopcnt >= MAXALIVECNT) { 1211 printf (SPP_FMT "loopback\n", 1212 SPP_ARGS(ifp)); 1213 sp->pp_loopcnt = 0; 1214 if (ifp->if_flags & IFF_UP) { 1215 if_down (ifp); 1216 IF_PURGE (&sp->pp_cpq); 1217 } 1218 } 1219 ++sp->pp_loopcnt; 1220 1221 /* Generate new local sequence number */ 1222 sp->pp_seq[IDX_LCP] = random(); 1223 break; 1224 } 1225 sp->pp_loopcnt = 0; 1226 if (! (ifp->if_flags & IFF_UP) && 1227 (ifp->if_flags & IFF_RUNNING)) { 1228 if_up(ifp); 1229 } 1230 break; 1231 case CISCO_ADDR_REQ: 1232 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1233 if (me != 0L) 1234 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1235 break; 1236 } 1237 } 1238 1239 /* 1240 * Send Cisco keepalive packet. 1241 */ 1242 static void 1243 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1244 { 1245 STDDCL; 1246 struct ppp_header *h; 1247 struct cisco_packet *ch; 1248 struct mbuf *m; 1249 u_int32_t t = (time.tv_sec - boottime.tv_sec) * 1000; 1250 1251 MGETHDR (m, M_DONTWAIT, MT_DATA); 1252 if (! m) 1253 return; 1254 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1255 m->m_pkthdr.rcvif = 0; 1256 1257 h = mtod (m, struct ppp_header*); 1258 h->address = CISCO_MULTICAST; 1259 h->control = 0; 1260 h->protocol = htons (CISCO_KEEPALIVE); 1261 1262 ch = (struct cisco_packet*) (h + 1); 1263 ch->type = htonl (type); 1264 ch->par1 = htonl (par1); 1265 ch->par2 = htonl (par2); 1266 ch->rel = -1; 1267 1268 ch->time0 = htons ((u_short) (t >> 16)); 1269 ch->time1 = htons ((u_short) t); 1270 1271 if (debug) 1272 log(LOG_DEBUG, 1273 SPP_FMT "cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1274 SPP_ARGS(ifp), ntohl (ch->type), ch->par1, 1275 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1276 (u_int)ch->time1); 1277 1278 if (IF_QFULL (&sp->pp_cpq)) { 1279 IF_DROP (&sp->pp_fastq); 1280 IF_DROP (&ifp->if_snd); 1281 m_freem (m); 1282 } else 1283 IF_ENQUEUE (&sp->pp_cpq, m); 1284 if (! (ifp->if_flags & IFF_OACTIVE)) 1285 (*ifp->if_start) (ifp); 1286 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1287 } 1288 1289 /* 1290 * PPP protocol implementation. 1291 */ 1292 1293 /* 1294 * Send PPP control protocol packet. 1295 */ 1296 static void 1297 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1298 u_char ident, u_short len, void *data) 1299 { 1300 STDDCL; 1301 struct lcp_header *lh; 1302 struct mbuf *m; 1303 size_t pkthdrlen; 1304 1305 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1306 1307 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1308 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1309 MGETHDR (m, M_DONTWAIT, MT_DATA); 1310 if (! m) 1311 return; 1312 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1313 m->m_pkthdr.rcvif = 0; 1314 1315 if (sp->pp_flags & PP_NOFRAMING) { 1316 *mtod(m, u_int16_t*) = htons(proto); 1317 lh = (struct lcp_header*)(mtod(m, u_int8_t*) + 2); 1318 } else { 1319 struct ppp_header *h; 1320 h = mtod (m, struct ppp_header*); 1321 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1322 h->control = PPP_UI; /* Unnumbered Info */ 1323 h->protocol = htons (proto); /* Link Control Protocol */ 1324 lh = (struct lcp_header*) (h + 1); 1325 } 1326 lh->type = type; 1327 lh->ident = ident; 1328 lh->len = htons (LCP_HEADER_LEN + len); 1329 if (len) 1330 bcopy (data, lh+1, len); 1331 1332 if (debug) { 1333 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 1334 SPP_ARGS(ifp), 1335 sppp_proto_name(proto), 1336 sppp_cp_type_name (lh->type), lh->ident, 1337 ntohs (lh->len)); 1338 if (len) 1339 sppp_print_bytes ((u_char*) (lh+1), len); 1340 addlog(">\n"); 1341 } 1342 if (IF_QFULL (&sp->pp_cpq)) { 1343 IF_DROP (&sp->pp_fastq); 1344 IF_DROP (&ifp->if_snd); 1345 m_freem (m); 1346 ++ifp->if_oerrors; 1347 } else 1348 IF_ENQUEUE (&sp->pp_cpq, m); 1349 if (! (ifp->if_flags & IFF_OACTIVE)) 1350 (*ifp->if_start) (ifp); 1351 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1352 } 1353 1354 /* 1355 * Handle incoming PPP control protocol packets. 1356 */ 1357 static void 1358 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1359 { 1360 STDDCL; 1361 struct lcp_header *h; 1362 int len = m->m_pkthdr.len; 1363 int rv; 1364 u_char *p; 1365 u_int32_t u32; 1366 1367 if (len < 4) { 1368 if (debug) 1369 log(LOG_DEBUG, 1370 SPP_FMT "%s invalid packet length: %d bytes\n", 1371 SPP_ARGS(ifp), cp->name, len); 1372 return; 1373 } 1374 h = mtod (m, struct lcp_header*); 1375 if (debug) { 1376 log(LOG_DEBUG, 1377 SPP_FMT "%s input(%s): <%s id=0x%x len=%d", 1378 SPP_ARGS(ifp), cp->name, 1379 sppp_state_name(sp->state[cp->protoidx]), 1380 sppp_cp_type_name (h->type), h->ident, ntohs (h->len)); 1381 if (len > 4) 1382 sppp_print_bytes ((u_char*) (h+1), len-4); 1383 addlog(">\n"); 1384 } 1385 if (len > ntohs (h->len)) 1386 len = ntohs (h->len); 1387 p = (u_char *)(h + 1); 1388 switch (h->type) { 1389 case CONF_REQ: 1390 if (len < 4) { 1391 if (debug) 1392 addlog(SPP_FMT "%s invalid conf-req length %d\n", 1393 SPP_ARGS(ifp), cp->name, 1394 len); 1395 ++ifp->if_ierrors; 1396 break; 1397 } 1398 /* handle states where RCR doesn't get a SCA/SCN */ 1399 switch (sp->state[cp->protoidx]) { 1400 case STATE_CLOSING: 1401 case STATE_STOPPING: 1402 return; 1403 case STATE_CLOSED: 1404 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1405 0, 0); 1406 return; 1407 } 1408 rv = (cp->RCR)(sp, h, len); 1409 switch (sp->state[cp->protoidx]) { 1410 case STATE_OPENED: 1411 (cp->tld)(sp); 1412 (cp->scr)(sp); 1413 /* fall through... */ 1414 case STATE_ACK_SENT: 1415 case STATE_REQ_SENT: 1416 sppp_cp_change_state(cp, sp, rv? 1417 STATE_ACK_SENT: STATE_REQ_SENT); 1418 break; 1419 case STATE_STOPPED: 1420 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1421 (cp->scr)(sp); 1422 sppp_cp_change_state(cp, sp, rv? 1423 STATE_ACK_SENT: STATE_REQ_SENT); 1424 break; 1425 case STATE_ACK_RCVD: 1426 if (rv) { 1427 sppp_cp_change_state(cp, sp, STATE_OPENED); 1428 if (debug) 1429 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1430 SPP_ARGS(ifp), 1431 cp->name); 1432 (cp->tlu)(sp); 1433 } else 1434 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1435 break; 1436 default: 1437 printf(SPP_FMT "%s illegal %s in state %s\n", 1438 SPP_ARGS(ifp), cp->name, 1439 sppp_cp_type_name(h->type), 1440 sppp_state_name(sp->state[cp->protoidx])); 1441 ++ifp->if_ierrors; 1442 } 1443 break; 1444 case CONF_ACK: 1445 if (h->ident != sp->confid[cp->protoidx]) { 1446 if (debug) 1447 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1448 SPP_ARGS(ifp), cp->name, 1449 h->ident, sp->confid[cp->protoidx]); 1450 ++ifp->if_ierrors; 1451 break; 1452 } 1453 switch (sp->state[cp->protoidx]) { 1454 case STATE_CLOSED: 1455 case STATE_STOPPED: 1456 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1457 break; 1458 case STATE_CLOSING: 1459 case STATE_STOPPING: 1460 break; 1461 case STATE_REQ_SENT: 1462 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1463 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1464 break; 1465 case STATE_OPENED: 1466 (cp->tld)(sp); 1467 /* fall through */ 1468 case STATE_ACK_RCVD: 1469 (cp->scr)(sp); 1470 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1471 break; 1472 case STATE_ACK_SENT: 1473 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1474 sppp_cp_change_state(cp, sp, STATE_OPENED); 1475 if (debug) 1476 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1477 SPP_ARGS(ifp), cp->name); 1478 (cp->tlu)(sp); 1479 break; 1480 default: 1481 printf(SPP_FMT "%s illegal %s in state %s\n", 1482 SPP_ARGS(ifp), cp->name, 1483 sppp_cp_type_name(h->type), 1484 sppp_state_name(sp->state[cp->protoidx])); 1485 ++ifp->if_ierrors; 1486 } 1487 break; 1488 case CONF_NAK: 1489 case CONF_REJ: 1490 if (h->ident != sp->confid[cp->protoidx]) { 1491 if (debug) 1492 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1493 SPP_ARGS(ifp), cp->name, 1494 h->ident, sp->confid[cp->protoidx]); 1495 ++ifp->if_ierrors; 1496 break; 1497 } 1498 if (h->type == CONF_NAK) 1499 (cp->RCN_nak)(sp, h, len); 1500 else /* CONF_REJ */ 1501 (cp->RCN_rej)(sp, h, len); 1502 1503 switch (sp->state[cp->protoidx]) { 1504 case STATE_CLOSED: 1505 case STATE_STOPPED: 1506 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1507 break; 1508 case STATE_REQ_SENT: 1509 case STATE_ACK_SENT: 1510 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1511 (cp->scr)(sp); 1512 break; 1513 case STATE_OPENED: 1514 (cp->tld)(sp); 1515 /* fall through */ 1516 case STATE_ACK_RCVD: 1517 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1518 (cp->scr)(sp); 1519 break; 1520 case STATE_CLOSING: 1521 case STATE_STOPPING: 1522 break; 1523 default: 1524 printf(SPP_FMT "%s illegal %s in state %s\n", 1525 SPP_ARGS(ifp), cp->name, 1526 sppp_cp_type_name(h->type), 1527 sppp_state_name(sp->state[cp->protoidx])); 1528 ++ifp->if_ierrors; 1529 } 1530 break; 1531 1532 case TERM_REQ: 1533 switch (sp->state[cp->protoidx]) { 1534 case STATE_ACK_RCVD: 1535 case STATE_ACK_SENT: 1536 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1537 /* fall through */ 1538 case STATE_CLOSED: 1539 case STATE_STOPPED: 1540 case STATE_CLOSING: 1541 case STATE_STOPPING: 1542 case STATE_REQ_SENT: 1543 sta: 1544 /* Send Terminate-Ack packet. */ 1545 if (debug) 1546 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n", 1547 SPP_ARGS(ifp), cp->name); 1548 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1549 break; 1550 case STATE_OPENED: 1551 (cp->tld)(sp); 1552 sp->rst_counter[cp->protoidx] = 0; 1553 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1554 goto sta; 1555 break; 1556 default: 1557 printf(SPP_FMT "%s illegal %s in state %s\n", 1558 SPP_ARGS(ifp), cp->name, 1559 sppp_cp_type_name(h->type), 1560 sppp_state_name(sp->state[cp->protoidx])); 1561 ++ifp->if_ierrors; 1562 } 1563 break; 1564 case TERM_ACK: 1565 switch (sp->state[cp->protoidx]) { 1566 case STATE_CLOSED: 1567 case STATE_STOPPED: 1568 case STATE_REQ_SENT: 1569 case STATE_ACK_SENT: 1570 break; 1571 case STATE_CLOSING: 1572 (cp->tlf)(sp); 1573 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1574 sppp_lcp_check_and_close(sp); 1575 break; 1576 case STATE_STOPPING: 1577 (cp->tlf)(sp); 1578 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1579 sppp_lcp_check_and_close(sp); 1580 break; 1581 case STATE_ACK_RCVD: 1582 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1583 break; 1584 case STATE_OPENED: 1585 (cp->tld)(sp); 1586 (cp->scr)(sp); 1587 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1588 break; 1589 default: 1590 printf(SPP_FMT "%s illegal %s in state %s\n", 1591 SPP_ARGS(ifp), cp->name, 1592 sppp_cp_type_name(h->type), 1593 sppp_state_name(sp->state[cp->protoidx])); 1594 ++ifp->if_ierrors; 1595 } 1596 break; 1597 case CODE_REJ: 1598 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1599 log(LOG_INFO, 1600 SPP_FMT "%s: ignoring RXJ (%s) for code ?, " 1601 "danger will robinson\n", 1602 SPP_ARGS(ifp), cp->name, 1603 sppp_cp_type_name(h->type)); 1604 switch (sp->state[cp->protoidx]) { 1605 case STATE_CLOSED: 1606 case STATE_STOPPED: 1607 case STATE_REQ_SENT: 1608 case STATE_ACK_SENT: 1609 case STATE_CLOSING: 1610 case STATE_STOPPING: 1611 case STATE_OPENED: 1612 break; 1613 case STATE_ACK_RCVD: 1614 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1615 break; 1616 default: 1617 printf(SPP_FMT "%s illegal %s in state %s\n", 1618 SPP_ARGS(ifp), cp->name, 1619 sppp_cp_type_name(h->type), 1620 sppp_state_name(sp->state[cp->protoidx])); 1621 ++ifp->if_ierrors; 1622 } 1623 break; 1624 case PROTO_REJ: 1625 { 1626 int catastrophic; 1627 const struct cp *upper; 1628 int i; 1629 u_int16_t proto; 1630 1631 catastrophic = 0; 1632 upper = NULL; 1633 proto = p[0] << 8 | p[1]; 1634 for (i = 0; i < IDX_COUNT; i++) { 1635 if (cps[i]->proto == proto) { 1636 upper = cps[i]; 1637 break; 1638 } 1639 } 1640 if (upper == NULL) 1641 catastrophic++; 1642 1643 if (debug) 1644 log(LOG_INFO, 1645 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1646 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+', 1647 sppp_cp_type_name(h->type), proto, 1648 upper ? upper->name : "unknown", 1649 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1650 1651 /* 1652 * if we got RXJ+ against conf-req, the peer does not implement 1653 * this particular protocol type. terminate the protocol. 1654 */ 1655 if (upper && !catastrophic) { 1656 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1657 upper->Close(sp); 1658 break; 1659 } 1660 } 1661 1662 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1663 switch (sp->state[cp->protoidx]) { 1664 case STATE_CLOSED: 1665 case STATE_STOPPED: 1666 case STATE_REQ_SENT: 1667 case STATE_ACK_SENT: 1668 case STATE_CLOSING: 1669 case STATE_STOPPING: 1670 case STATE_OPENED: 1671 break; 1672 case STATE_ACK_RCVD: 1673 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1674 break; 1675 default: 1676 printf(SPP_FMT "%s illegal %s in state %s\n", 1677 SPP_ARGS(ifp), cp->name, 1678 sppp_cp_type_name(h->type), 1679 sppp_state_name(sp->state[cp->protoidx])); 1680 ++ifp->if_ierrors; 1681 } 1682 break; 1683 } 1684 case DISC_REQ: 1685 if (cp->proto != PPP_LCP) 1686 goto illegal; 1687 /* Discard the packet. */ 1688 break; 1689 case ECHO_REQ: 1690 if (cp->proto != PPP_LCP) 1691 goto illegal; 1692 if (sp->state[cp->protoidx] != STATE_OPENED) { 1693 if (debug) 1694 addlog(SPP_FMT "lcp echo req but lcp closed\n", 1695 SPP_ARGS(ifp)); 1696 ++ifp->if_ierrors; 1697 break; 1698 } 1699 if (len < 8) { 1700 if (debug) 1701 addlog(SPP_FMT "invalid lcp echo request " 1702 "packet length: %d bytes\n", 1703 SPP_ARGS(ifp), len); 1704 break; 1705 } 1706 memcpy(&u32, h + 1, sizeof u32); 1707 if (ntohl(u32) == sp->lcp.magic) { 1708 /* Line loopback mode detected. */ 1709 printf(SPP_FMT "loopback\n", SPP_ARGS(ifp)); 1710 if_down (ifp); 1711 IF_PURGE (&sp->pp_cpq); 1712 1713 /* Shut down the PPP link. */ 1714 /* XXX */ 1715 lcp.Down(sp); 1716 lcp.Up(sp); 1717 break; 1718 } 1719 u32 = htonl(sp->lcp.magic); 1720 memcpy(h + 1, &u32, sizeof u32); 1721 if (debug) 1722 addlog(SPP_FMT "got lcp echo req, sending echo rep\n", 1723 SPP_ARGS(ifp)); 1724 sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1); 1725 break; 1726 case ECHO_REPLY: 1727 if (cp->proto != PPP_LCP) 1728 goto illegal; 1729 if (h->ident != sp->lcp.echoid) { 1730 ++ifp->if_ierrors; 1731 break; 1732 } 1733 if (len < 8) { 1734 if (debug) 1735 addlog(SPP_FMT "lcp invalid echo reply " 1736 "packet length: %d bytes\n", 1737 SPP_ARGS(ifp), len); 1738 break; 1739 } 1740 if (debug) 1741 addlog(SPP_FMT "lcp got echo rep\n", 1742 SPP_ARGS(ifp)); 1743 memcpy(&u32, h + 1, sizeof u32); 1744 if (ntohl(u32) != sp->lcp.magic) 1745 sp->pp_alivecnt = 0; 1746 break; 1747 default: 1748 /* Unknown packet type -- send Code-Reject packet. */ 1749 illegal: 1750 if (debug) 1751 addlog(SPP_FMT "%s send code-rej for 0x%x\n", 1752 SPP_ARGS(ifp), cp->name, h->type); 1753 sppp_cp_send(sp, cp->proto, CODE_REJ, 1754 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 1755 ++ifp->if_ierrors; 1756 } 1757 } 1758 1759 1760 /* 1761 * The generic part of all Up/Down/Open/Close/TO event handlers. 1762 * Basically, the state transition handling in the automaton. 1763 */ 1764 static void 1765 sppp_up_event(const struct cp *cp, struct sppp *sp) 1766 { 1767 STDDCL; 1768 1769 if (debug) 1770 log(LOG_DEBUG, SPP_FMT "%s up(%s)\n", 1771 SPP_ARGS(ifp), cp->name, 1772 sppp_state_name(sp->state[cp->protoidx])); 1773 1774 switch (sp->state[cp->protoidx]) { 1775 case STATE_INITIAL: 1776 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1777 break; 1778 case STATE_STARTING: 1779 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1780 (cp->scr)(sp); 1781 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1782 break; 1783 default: 1784 printf(SPP_FMT "%s illegal up in state %s\n", 1785 SPP_ARGS(ifp), cp->name, 1786 sppp_state_name(sp->state[cp->protoidx])); 1787 } 1788 } 1789 1790 static void 1791 sppp_down_event(const struct cp *cp, struct sppp *sp) 1792 { 1793 STDDCL; 1794 1795 if (debug) 1796 log(LOG_DEBUG, SPP_FMT "%s down(%s)\n", 1797 SPP_ARGS(ifp), cp->name, 1798 sppp_state_name(sp->state[cp->protoidx])); 1799 1800 switch (sp->state[cp->protoidx]) { 1801 case STATE_CLOSED: 1802 case STATE_CLOSING: 1803 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1804 break; 1805 case STATE_STOPPED: 1806 (cp->tls)(sp); 1807 /* fall through */ 1808 case STATE_STOPPING: 1809 case STATE_REQ_SENT: 1810 case STATE_ACK_RCVD: 1811 case STATE_ACK_SENT: 1812 sppp_cp_change_state(cp, sp, STATE_STARTING); 1813 break; 1814 case STATE_OPENED: 1815 (cp->tld)(sp); 1816 sppp_cp_change_state(cp, sp, STATE_STARTING); 1817 break; 1818 default: 1819 printf(SPP_FMT "%s illegal down in state %s\n", 1820 SPP_ARGS(ifp), cp->name, 1821 sppp_state_name(sp->state[cp->protoidx])); 1822 } 1823 } 1824 1825 1826 static void 1827 sppp_open_event(const struct cp *cp, struct sppp *sp) 1828 { 1829 STDDCL; 1830 1831 if (debug) 1832 log(LOG_DEBUG, SPP_FMT "%s open(%s)\n", 1833 SPP_ARGS(ifp), cp->name, 1834 sppp_state_name(sp->state[cp->protoidx])); 1835 1836 switch (sp->state[cp->protoidx]) { 1837 case STATE_INITIAL: 1838 (cp->tls)(sp); 1839 sppp_cp_change_state(cp, sp, STATE_STARTING); 1840 break; 1841 case STATE_STARTING: 1842 break; 1843 case STATE_CLOSED: 1844 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1845 (cp->scr)(sp); 1846 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1847 break; 1848 case STATE_STOPPED: 1849 case STATE_STOPPING: 1850 case STATE_REQ_SENT: 1851 case STATE_ACK_RCVD: 1852 case STATE_ACK_SENT: 1853 case STATE_OPENED: 1854 break; 1855 case STATE_CLOSING: 1856 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1857 break; 1858 } 1859 } 1860 1861 1862 static void 1863 sppp_close_event(const struct cp *cp, struct sppp *sp) 1864 { 1865 STDDCL; 1866 1867 if (debug) 1868 log(LOG_DEBUG, SPP_FMT "%s close(%s)\n", 1869 SPP_ARGS(ifp), cp->name, 1870 sppp_state_name(sp->state[cp->protoidx])); 1871 1872 switch (sp->state[cp->protoidx]) { 1873 case STATE_INITIAL: 1874 case STATE_CLOSED: 1875 case STATE_CLOSING: 1876 break; 1877 case STATE_STARTING: 1878 (cp->tlf)(sp); 1879 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1880 break; 1881 case STATE_STOPPED: 1882 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1883 break; 1884 case STATE_STOPPING: 1885 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1886 break; 1887 case STATE_OPENED: 1888 (cp->tld)(sp); 1889 /* fall through */ 1890 case STATE_REQ_SENT: 1891 case STATE_ACK_RCVD: 1892 case STATE_ACK_SENT: 1893 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 1894 sppp_cp_send(sp, cp->proto, TERM_REQ, 1895 ++sp->pp_seq[cp->protoidx], 0, 0); 1896 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1897 break; 1898 } 1899 } 1900 1901 static void 1902 sppp_to_event(const struct cp *cp, struct sppp *sp) 1903 { 1904 STDDCL; 1905 int s; 1906 1907 s = splnet(); 1908 if (debug) 1909 log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n", 1910 SPP_ARGS(ifp), cp->name, 1911 sppp_state_name(sp->state[cp->protoidx]), 1912 sp->rst_counter[cp->protoidx]); 1913 1914 if (--sp->rst_counter[cp->protoidx] < 0) 1915 /* TO- event */ 1916 switch (sp->state[cp->protoidx]) { 1917 case STATE_CLOSING: 1918 (cp->tlf)(sp); 1919 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1920 sppp_lcp_check_and_close(sp); 1921 break; 1922 case STATE_STOPPING: 1923 (cp->tlf)(sp); 1924 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1925 sppp_lcp_check_and_close(sp); 1926 break; 1927 case STATE_REQ_SENT: 1928 case STATE_ACK_RCVD: 1929 case STATE_ACK_SENT: 1930 (cp->tlf)(sp); 1931 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1932 sppp_lcp_check_and_close(sp); 1933 break; 1934 } 1935 else 1936 /* TO+ event */ 1937 switch (sp->state[cp->protoidx]) { 1938 case STATE_CLOSING: 1939 case STATE_STOPPING: 1940 sppp_cp_send(sp, cp->proto, TERM_REQ, 1941 ++sp->pp_seq[cp->protoidx], 0, 0); 1942 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1943 cp->TO, sp); 1944 break; 1945 case STATE_REQ_SENT: 1946 case STATE_ACK_RCVD: 1947 (cp->scr)(sp); 1948 /* sppp_cp_change_state() will restart the timer */ 1949 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1950 break; 1951 case STATE_ACK_SENT: 1952 (cp->scr)(sp); 1953 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1954 cp->TO, sp); 1955 break; 1956 } 1957 1958 splx(s); 1959 } 1960 1961 /* 1962 * Change the state of a control protocol in the state automaton. 1963 * Takes care of starting/stopping the restart timer. 1964 */ 1965 void 1966 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 1967 { 1968 sp->state[cp->protoidx] = newstate; 1969 callout_stop(&sp->ch[cp->protoidx]); 1970 switch (newstate) { 1971 case STATE_INITIAL: 1972 case STATE_STARTING: 1973 case STATE_CLOSED: 1974 case STATE_STOPPED: 1975 case STATE_OPENED: 1976 break; 1977 case STATE_CLOSING: 1978 case STATE_STOPPING: 1979 case STATE_REQ_SENT: 1980 case STATE_ACK_RCVD: 1981 case STATE_ACK_SENT: 1982 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1983 cp->TO, sp); 1984 break; 1985 } 1986 } 1987 1988 /* 1989 *--------------------------------------------------------------------------* 1990 * * 1991 * The LCP implementation. * 1992 * * 1993 *--------------------------------------------------------------------------* 1994 */ 1995 static void 1996 sppp_lcp_init(struct sppp *sp) 1997 { 1998 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 1999 sp->lcp.magic = 0; 2000 sp->state[IDX_LCP] = STATE_INITIAL; 2001 sp->fail_counter[IDX_LCP] = 0; 2002 sp->pp_seq[IDX_LCP] = 0; 2003 sp->pp_rseq[IDX_LCP] = 0; 2004 sp->lcp.protos = 0; 2005 sp->lcp.mru = sp->lcp.their_mru = PP_MTU; 2006 2007 /* 2008 * Initialize counters and timeout values. Note that we don't 2009 * use the 3 seconds suggested in RFC 1661 since we are likely 2010 * running on a fast link. XXX We should probably implement 2011 * the exponential backoff option. Note that these values are 2012 * relevant for all control protocols, not just LCP only. 2013 */ 2014 sp->lcp.timeout = 1 * hz; 2015 sp->lcp.max_terminate = 2; 2016 sp->lcp.max_configure = 10; 2017 sp->lcp.max_failure = 10; 2018 callout_init(&sp->ch[IDX_LCP]); 2019 } 2020 2021 static void 2022 sppp_lcp_up(struct sppp *sp) 2023 { 2024 STDDCL; 2025 2026 /* Initialize activity timestamp: opening a connection is an activity */ 2027 sp->pp_last_activity = time.tv_sec; 2028 2029 /* 2030 * If this interface is passive or dial-on-demand, and we are 2031 * still in Initial state, it means we've got an incoming 2032 * call. Activate the interface. 2033 */ 2034 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2035 if (debug) 2036 log(LOG_DEBUG, 2037 SPP_FMT "Up event", SPP_ARGS(ifp)); 2038 ifp->if_flags |= IFF_RUNNING; 2039 if (sp->state[IDX_LCP] == STATE_INITIAL) { 2040 if (debug) 2041 addlog("(incoming call)\n"); 2042 sp->pp_flags |= PP_CALLIN; 2043 lcp.Open(sp); 2044 } else if (debug) 2045 addlog("\n"); 2046 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 && 2047 (sp->state[IDX_LCP] == STATE_INITIAL)) { 2048 ifp->if_flags |= IFF_RUNNING; 2049 lcp.Open(sp); 2050 } 2051 2052 sppp_up_event(&lcp, sp); 2053 } 2054 2055 static void 2056 sppp_lcp_down(struct sppp *sp) 2057 { 2058 STDDCL; 2059 2060 sppp_down_event(&lcp, sp); 2061 2062 /* 2063 * If this is neither a dial-on-demand nor a passive 2064 * interface, simulate an ``ifconfig down'' action, so the 2065 * administrator can force a redial by another ``ifconfig 2066 * up''. XXX For leased line operation, should we immediately 2067 * try to reopen the connection here? 2068 */ 2069 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2070 if (debug) 2071 log(LOG_INFO, 2072 SPP_FMT "Down event (carrier loss), taking interface down.\n", 2073 SPP_ARGS(ifp)); 2074 if_down(ifp); 2075 } else { 2076 if (debug) 2077 log(LOG_DEBUG, 2078 SPP_FMT "Down event (carrier loss)\n", 2079 SPP_ARGS(ifp)); 2080 } 2081 sp->pp_flags &= ~PP_CALLIN; 2082 if (sp->state[IDX_LCP] != STATE_INITIAL) 2083 lcp.Close(sp); 2084 ifp->if_flags &= ~IFF_RUNNING; 2085 } 2086 2087 static void 2088 sppp_lcp_open(struct sppp *sp) 2089 { 2090 /* 2091 * If we are authenticator, negotiate LCP_AUTH 2092 */ 2093 if (sp->hisauth.proto != 0) 2094 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2095 else 2096 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2097 sp->pp_flags &= ~PP_NEEDAUTH; 2098 sppp_open_event(&lcp, sp); 2099 } 2100 2101 static void 2102 sppp_lcp_close(struct sppp *sp) 2103 { 2104 sppp_close_event(&lcp, sp); 2105 } 2106 2107 static void 2108 sppp_lcp_TO(void *cookie) 2109 { 2110 sppp_to_event(&lcp, (struct sppp *)cookie); 2111 } 2112 2113 /* 2114 * Analyze a configure request. Return true if it was agreeable, and 2115 * caused action sca, false if it has been rejected or nak'ed, and 2116 * caused action scn. (The return value is used to make the state 2117 * transition decision in the state automaton.) 2118 */ 2119 static int 2120 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2121 { 2122 STDDCL; 2123 u_char *buf, *r, *p; 2124 int origlen, rlen; 2125 u_int32_t nmagic; 2126 u_short authproto; 2127 2128 len -= 4; 2129 origlen = len; 2130 buf = r = malloc (len, M_TEMP, M_NOWAIT); 2131 if (! buf) 2132 return (0); 2133 2134 if (debug) 2135 log(LOG_DEBUG, SPP_FMT "lcp parse opts:", 2136 SPP_ARGS(ifp)); 2137 2138 /* pass 1: check for things that need to be rejected */ 2139 p = (void*) (h+1); 2140 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2141 if (debug) 2142 addlog(" %s", sppp_lcp_opt_name(*p)); 2143 switch (*p) { 2144 case LCP_OPT_MAGIC: 2145 /* Magic number. */ 2146 /* fall through, both are same length */ 2147 case LCP_OPT_ASYNC_MAP: 2148 /* Async control character map. */ 2149 if (len >= 6 || p[1] == 6) 2150 continue; 2151 if (debug) 2152 addlog(" [invalid]"); 2153 break; 2154 case LCP_OPT_MRU: 2155 /* Maximum receive unit. */ 2156 if (len >= 4 && p[1] == 4) 2157 continue; 2158 if (debug) 2159 addlog(" [invalid]"); 2160 break; 2161 case LCP_OPT_AUTH_PROTO: 2162 if (len < 4) { 2163 if (debug) 2164 addlog(" [invalid]"); 2165 break; 2166 } 2167 authproto = (p[2] << 8) + p[3]; 2168 if (authproto == PPP_CHAP && p[1] != 5) { 2169 if (debug) 2170 addlog(" [invalid chap len]"); 2171 break; 2172 } 2173 if (sp->myauth.proto == 0) { 2174 /* we are not configured to do auth */ 2175 if (debug) 2176 addlog(" [not configured]"); 2177 break; 2178 } 2179 /* 2180 * Remote want us to authenticate, remember this, 2181 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2182 * up. 2183 */ 2184 sp->pp_flags |= PP_NEEDAUTH; 2185 continue; 2186 default: 2187 /* Others not supported. */ 2188 if (debug) 2189 addlog(" [rej]"); 2190 break; 2191 } 2192 /* Add the option to rejected list. */ 2193 bcopy (p, r, p[1]); 2194 r += p[1]; 2195 rlen += p[1]; 2196 } 2197 if (rlen) { 2198 if (debug) 2199 addlog(" send conf-rej\n"); 2200 sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2201 goto end; 2202 } else if (debug) 2203 addlog("\n"); 2204 2205 /* 2206 * pass 2: check for option values that are unacceptable and 2207 * thus require to be nak'ed. 2208 */ 2209 if (debug) 2210 log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ", 2211 SPP_ARGS(ifp)); 2212 2213 p = (void*) (h+1); 2214 len = origlen; 2215 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2216 if (debug) 2217 addlog(" %s", sppp_lcp_opt_name(*p)); 2218 switch (*p) { 2219 case LCP_OPT_MAGIC: 2220 /* Magic number -- extract. */ 2221 nmagic = (u_int32_t)p[2] << 24 | 2222 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2223 if (nmagic != sp->lcp.magic) { 2224 if (debug) 2225 addlog(" 0x%x", nmagic); 2226 continue; 2227 } 2228 /* 2229 * Local and remote magics equal -- loopback? 2230 */ 2231 if (sp->pp_loopcnt >= MAXALIVECNT*5) { 2232 printf (SPP_FMT "loopback\n", 2233 SPP_ARGS(ifp)); 2234 sp->pp_loopcnt = 0; 2235 if (ifp->if_flags & IFF_UP) { 2236 if_down(ifp); 2237 IF_PURGE(&sp->pp_cpq); 2238 /* XXX ? */ 2239 lcp.Down(sp); 2240 lcp.Up(sp); 2241 } 2242 } else if (debug) 2243 addlog(" [glitch]"); 2244 ++sp->pp_loopcnt; 2245 /* 2246 * We negate our magic here, and NAK it. If 2247 * we see it later in an NAK packet, we 2248 * suggest a new one. 2249 */ 2250 nmagic = ~sp->lcp.magic; 2251 /* Gonna NAK it. */ 2252 p[2] = nmagic >> 24; 2253 p[3] = nmagic >> 16; 2254 p[4] = nmagic >> 8; 2255 p[5] = nmagic; 2256 break; 2257 2258 case LCP_OPT_ASYNC_MAP: 2259 /* Async control character map -- check to be zero. */ 2260 if (! p[2] && ! p[3] && ! p[4] && ! p[5]) { 2261 if (debug) 2262 addlog(" [empty]"); 2263 continue; 2264 } 2265 if (debug) 2266 addlog(" [non-empty]"); 2267 /* suggest a zero one */ 2268 p[2] = p[3] = p[4] = p[5] = 0; 2269 break; 2270 2271 case LCP_OPT_MRU: 2272 /* 2273 * Maximum receive unit. Always agreeable, 2274 * but ignored by now. 2275 */ 2276 sp->lcp.their_mru = p[2] * 256 + p[3]; 2277 if (debug) 2278 addlog(" %ld", sp->lcp.their_mru); 2279 continue; 2280 2281 case LCP_OPT_AUTH_PROTO: 2282 authproto = (p[2] << 8) + p[3]; 2283 if (sp->myauth.proto != authproto) { 2284 /* not agreed, nak */ 2285 if (debug) 2286 addlog(" [mine %s != his %s]", 2287 sppp_proto_name(sp->hisauth.proto), 2288 sppp_proto_name(authproto)); 2289 p[2] = sp->myauth.proto >> 8; 2290 p[3] = sp->myauth.proto; 2291 break; 2292 } 2293 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2294 if (debug) 2295 addlog(" [chap not MD5]"); 2296 p[4] = CHAP_MD5; 2297 break; 2298 } 2299 continue; 2300 } 2301 /* Add the option to nak'ed list. */ 2302 bcopy (p, r, p[1]); 2303 r += p[1]; 2304 rlen += p[1]; 2305 } 2306 if (rlen) { 2307 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2308 if (debug) 2309 addlog(" max_failure (%d) exceeded, " 2310 "send conf-rej\n", 2311 sp->lcp.max_failure); 2312 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2313 } else { 2314 if (debug) 2315 addlog(" send conf-nak\n"); 2316 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2317 } 2318 goto end; 2319 } else { 2320 if (debug) 2321 addlog(" send conf-ack\n"); 2322 sp->fail_counter[IDX_LCP] = 0; 2323 sp->pp_loopcnt = 0; 2324 sppp_cp_send (sp, PPP_LCP, CONF_ACK, 2325 h->ident, origlen, h+1); 2326 } 2327 2328 end: 2329 free (buf, M_TEMP); 2330 return (rlen == 0); 2331 } 2332 2333 /* 2334 * Analyze the LCP Configure-Reject option list, and adjust our 2335 * negotiation. 2336 */ 2337 static void 2338 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2339 { 2340 STDDCL; 2341 u_char *buf, *p; 2342 2343 len -= 4; 2344 buf = malloc (len, M_TEMP, M_NOWAIT); 2345 if (!buf) 2346 return; 2347 2348 if (debug) 2349 log(LOG_DEBUG, SPP_FMT "lcp rej opts:", 2350 SPP_ARGS(ifp)); 2351 2352 p = (void*) (h+1); 2353 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2354 if (debug) 2355 addlog(" %s", sppp_lcp_opt_name(*p)); 2356 switch (*p) { 2357 case LCP_OPT_MAGIC: 2358 /* Magic number -- can't use it, use 0 */ 2359 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2360 sp->lcp.magic = 0; 2361 break; 2362 case LCP_OPT_MRU: 2363 /* 2364 * Should not be rejected anyway, since we only 2365 * negotiate a MRU if explicitly requested by 2366 * peer. 2367 */ 2368 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2369 break; 2370 case LCP_OPT_AUTH_PROTO: 2371 /* 2372 * Peer doesn't want to authenticate himself, 2373 * deny unless this is a dialout call, and 2374 * SPPP_AUTHFLAG_NOCALLOUT is set. 2375 */ 2376 if ((sp->pp_flags & PP_CALLIN) == 0 && 2377 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2378 if (debug) 2379 addlog(" [don't insist on auth " 2380 "for callout]"); 2381 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2382 break; 2383 } 2384 if (debug) 2385 addlog("[access denied]\n"); 2386 lcp.Close(sp); 2387 break; 2388 } 2389 } 2390 if (debug) 2391 addlog("\n"); 2392 free (buf, M_TEMP); 2393 return; 2394 } 2395 2396 /* 2397 * Analyze the LCP Configure-NAK option list, and adjust our 2398 * negotiation. 2399 */ 2400 static void 2401 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2402 { 2403 STDDCL; 2404 u_char *buf, *p; 2405 u_int32_t magic; 2406 2407 len -= 4; 2408 buf = malloc (len, M_TEMP, M_NOWAIT); 2409 if (!buf) 2410 return; 2411 2412 if (debug) 2413 log(LOG_DEBUG, SPP_FMT "lcp nak opts:", 2414 SPP_ARGS(ifp)); 2415 2416 p = (void*) (h+1); 2417 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2418 if (debug) 2419 addlog(" %s", sppp_lcp_opt_name(*p)); 2420 switch (*p) { 2421 case LCP_OPT_MAGIC: 2422 /* Magic number -- renegotiate */ 2423 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2424 len >= 6 && p[1] == 6) { 2425 magic = (u_int32_t)p[2] << 24 | 2426 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2427 /* 2428 * If the remote magic is our negated one, 2429 * this looks like a loopback problem. 2430 * Suggest a new magic to make sure. 2431 */ 2432 if (magic == ~sp->lcp.magic) { 2433 if (debug) 2434 addlog(" magic glitch"); 2435 sp->lcp.magic = random(); 2436 } else { 2437 sp->lcp.magic = magic; 2438 if (debug) 2439 addlog(" %d", magic); 2440 } 2441 } 2442 break; 2443 case LCP_OPT_MRU: 2444 /* 2445 * Peer wants to advise us to negotiate an MRU. 2446 * Agree on it if it's reasonable, or use 2447 * default otherwise. 2448 */ 2449 if (len >= 4 && p[1] == 4) { 2450 u_int mru = p[2] * 256 + p[3]; 2451 if (debug) 2452 addlog(" %d", mru); 2453 if (mru < PP_MTU || mru > PP_MAX_MRU) 2454 mru = PP_MTU; 2455 sp->lcp.mru = mru; 2456 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2457 } 2458 break; 2459 case LCP_OPT_AUTH_PROTO: 2460 /* 2461 * Peer doesn't like our authentication method, 2462 * deny. 2463 */ 2464 if (debug) 2465 addlog("[access denied]\n"); 2466 lcp.Close(sp); 2467 break; 2468 } 2469 } 2470 if (debug) 2471 addlog("\n"); 2472 free (buf, M_TEMP); 2473 return; 2474 } 2475 2476 static void 2477 sppp_lcp_tlu(struct sppp *sp) 2478 { 2479 STDDCL; 2480 int i; 2481 u_int32_t mask; 2482 2483 /* XXX ? */ 2484 if (! (ifp->if_flags & IFF_UP) && 2485 (ifp->if_flags & IFF_RUNNING)) { 2486 /* Coming out of loopback mode. */ 2487 if_up(ifp); 2488 } 2489 2490 for (i = 0; i < IDX_COUNT; i++) 2491 if ((cps[i])->flags & CP_QUAL) 2492 (cps[i])->Open(sp); 2493 2494 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2495 (sp->pp_flags & PP_NEEDAUTH) != 0) 2496 sp->pp_phase = SPPP_PHASE_AUTHENTICATE; 2497 else 2498 sp->pp_phase = SPPP_PHASE_NETWORK; 2499 2500 if(debug) 2501 { 2502 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2503 sppp_phase_name(sp->pp_phase)); 2504 } 2505 2506 /* 2507 * Open all authentication protocols. This is even required 2508 * if we already proceeded to network phase, since it might be 2509 * that remote wants us to authenticate, so we might have to 2510 * send a PAP request. Undesired authentication protocols 2511 * don't do anything when they get an Open event. 2512 */ 2513 for (i = 0; i < IDX_COUNT; i++) 2514 if ((cps[i])->flags & CP_AUTH) 2515 (cps[i])->Open(sp); 2516 2517 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2518 /* Notify all NCPs. */ 2519 for (i = 0; i < IDX_COUNT; i++) 2520 if ((cps[i])->flags & CP_NCP) 2521 (cps[i])->Open(sp); 2522 } 2523 2524 /* Send Up events to all started protos. */ 2525 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2526 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) 2527 (cps[i])->Up(sp); 2528 2529 /* notify low-level driver of state change */ 2530 if (sp->pp_chg) 2531 sp->pp_chg(sp, (int)sp->pp_phase); 2532 2533 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2534 /* if no NCP is starting, close down */ 2535 sppp_lcp_check_and_close(sp); 2536 } 2537 2538 static void 2539 sppp_lcp_tld(struct sppp *sp) 2540 { 2541 STDDCL; 2542 int i; 2543 u_int32_t mask; 2544 2545 sp->pp_phase = SPPP_PHASE_TERMINATE; 2546 2547 if(debug) 2548 { 2549 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2550 sppp_phase_name(sp->pp_phase)); 2551 } 2552 2553 /* 2554 * Take upper layers down. We send the Down event first and 2555 * the Close second to prevent the upper layers from sending 2556 * ``a flurry of terminate-request packets'', as the RFC 2557 * describes it. 2558 */ 2559 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2560 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2561 (cps[i])->Down(sp); 2562 (cps[i])->Close(sp); 2563 } 2564 } 2565 2566 static void 2567 sppp_lcp_tls(struct sppp *sp) 2568 { 2569 STDDCL; 2570 2571 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2572 printf("%s: authentication failed %d times, not retrying again\n", 2573 sp->pp_if.if_xname, sp->pp_auth_failures); 2574 if_down(&sp->pp_if); 2575 return; 2576 } 2577 2578 sp->pp_phase = SPPP_PHASE_ESTABLISH; 2579 2580 if(debug) 2581 { 2582 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2583 sppp_phase_name(sp->pp_phase)); 2584 } 2585 2586 /* Notify lower layer if desired. */ 2587 if (sp->pp_tls) 2588 (sp->pp_tls)(sp); 2589 } 2590 2591 static void 2592 sppp_lcp_tlf(struct sppp *sp) 2593 { 2594 STDDCL; 2595 2596 sp->pp_phase = SPPP_PHASE_DEAD; 2597 2598 if(debug) 2599 { 2600 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2601 sppp_phase_name(sp->pp_phase)); 2602 } 2603 2604 /* Notify lower layer if desired. */ 2605 if (sp->pp_tlf) 2606 (sp->pp_tlf)(sp); 2607 } 2608 2609 static void 2610 sppp_lcp_scr(struct sppp *sp) 2611 { 2612 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2613 int i = 0; 2614 u_short authproto; 2615 2616 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2617 if (! sp->lcp.magic) 2618 sp->lcp.magic = random(); 2619 opt[i++] = LCP_OPT_MAGIC; 2620 opt[i++] = 6; 2621 opt[i++] = sp->lcp.magic >> 24; 2622 opt[i++] = sp->lcp.magic >> 16; 2623 opt[i++] = sp->lcp.magic >> 8; 2624 opt[i++] = sp->lcp.magic; 2625 } 2626 2627 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2628 opt[i++] = LCP_OPT_MRU; 2629 opt[i++] = 4; 2630 opt[i++] = sp->lcp.mru >> 8; 2631 opt[i++] = sp->lcp.mru; 2632 } 2633 2634 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2635 authproto = sp->hisauth.proto; 2636 opt[i++] = LCP_OPT_AUTH_PROTO; 2637 opt[i++] = authproto == PPP_CHAP? 5: 4; 2638 opt[i++] = authproto >> 8; 2639 opt[i++] = authproto; 2640 if (authproto == PPP_CHAP) 2641 opt[i++] = CHAP_MD5; 2642 } 2643 2644 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2645 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2646 } 2647 2648 /* 2649 * Check the open NCPs, return true if at least one NCP is open. 2650 */ 2651 static int 2652 sppp_ncp_check(struct sppp *sp) 2653 { 2654 int i, mask; 2655 2656 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2657 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2658 return 1; 2659 return 0; 2660 } 2661 2662 /* 2663 * Re-check the open NCPs and see if we should terminate the link. 2664 * Called by the NCPs during their tlf action handling. 2665 */ 2666 static void 2667 sppp_lcp_check_and_close(struct sppp *sp) 2668 { 2669 2670 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2671 /* don't bother, we are already going down */ 2672 return; 2673 2674 if (sppp_ncp_check(sp)) 2675 return; 2676 2677 lcp.Close(sp); 2678 } 2679 2680 2681 /* 2682 *--------------------------------------------------------------------------* 2683 * * 2684 * The IPCP implementation. * 2685 * * 2686 *--------------------------------------------------------------------------* 2687 */ 2688 2689 static void 2690 sppp_ipcp_init(struct sppp *sp) 2691 { 2692 sp->ipcp.opts = 0; 2693 sp->ipcp.flags = 0; 2694 sp->state[IDX_IPCP] = STATE_INITIAL; 2695 sp->fail_counter[IDX_IPCP] = 0; 2696 sp->pp_seq[IDX_IPCP] = 0; 2697 sp->pp_rseq[IDX_IPCP] = 0; 2698 callout_init(&sp->ch[IDX_IPCP]); 2699 } 2700 2701 static void 2702 sppp_ipcp_up(struct sppp *sp) 2703 { 2704 sppp_up_event(&ipcp, sp); 2705 } 2706 2707 static void 2708 sppp_ipcp_down(struct sppp *sp) 2709 { 2710 sppp_down_event(&ipcp, sp); 2711 } 2712 2713 static void 2714 sppp_ipcp_open(struct sppp *sp) 2715 { 2716 STDDCL; 2717 u_int32_t myaddr, hisaddr; 2718 2719 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 2720 sp->ipcp.req_myaddr = 0; 2721 sp->ipcp.req_hisaddr = 0; 2722 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 2723 2724 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 2725 /* 2726 * If we don't have his address, this probably means our 2727 * interface doesn't want to talk IP at all. (This could 2728 * be the case if somebody wants to speak only IPX, for 2729 * example.) Don't open IPCP in this case. 2730 */ 2731 if (hisaddr == 0L) { 2732 /* XXX this message should go away */ 2733 if (debug) 2734 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n", 2735 SPP_ARGS(ifp)); 2736 return; 2737 } 2738 2739 if (myaddr == 0) { 2740 /* 2741 * I don't have an assigned address, so i need to 2742 * negotiate my address. 2743 */ 2744 sp->ipcp.flags |= IPCP_MYADDR_DYN; 2745 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 2746 } 2747 if (hisaddr == 1) { 2748 /* 2749 * XXX - remove this hack! 2750 * remote has no valid adress, we need to get one assigned. 2751 */ 2752 sp->ipcp.flags |= IPCP_HISADDR_DYN; 2753 } 2754 sppp_open_event(&ipcp, sp); 2755 } 2756 2757 static void 2758 sppp_ipcp_close(struct sppp *sp) 2759 { 2760 sppp_close_event(&ipcp, sp); 2761 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 2762 /* 2763 * Some address was dynamic, clear it again. 2764 */ 2765 sppp_clear_ip_addrs(sp); 2766 } 2767 2768 static void 2769 sppp_ipcp_TO(void *cookie) 2770 { 2771 sppp_to_event(&ipcp, (struct sppp *)cookie); 2772 } 2773 2774 /* 2775 * Analyze a configure request. Return true if it was agreeable, and 2776 * caused action sca, false if it has been rejected or nak'ed, and 2777 * caused action scn. (The return value is used to make the state 2778 * transition decision in the state automaton.) 2779 */ 2780 static int 2781 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2782 { 2783 u_char *buf, *r, *p; 2784 struct ifnet *ifp = &sp->pp_if; 2785 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 2786 u_int32_t hisaddr, desiredaddr; 2787 2788 len -= 4; 2789 origlen = len; 2790 /* 2791 * Make sure to allocate a buf that can at least hold a 2792 * conf-nak with an `address' option. We might need it below. 2793 */ 2794 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 2795 if (! buf) 2796 return (0); 2797 2798 /* pass 1: see if we can recognize them */ 2799 if (debug) 2800 log(LOG_DEBUG, SPP_FMT "ipcp parse opts:", 2801 SPP_ARGS(ifp)); 2802 p = (void*) (h+1); 2803 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2804 if (debug) 2805 addlog(" %s", sppp_ipcp_opt_name(*p)); 2806 switch (*p) { 2807 #ifdef notyet 2808 case IPCP_OPT_COMPRESSION: 2809 if (len >= 6 && p[1] >= 6) { 2810 /* correctly formed compress option */ 2811 continue; 2812 } 2813 if (debug) 2814 addlog(" [invalid]"); 2815 break; 2816 #endif 2817 case IPCP_OPT_ADDRESS: 2818 if (len >= 6 && p[1] == 6) { 2819 /* correctly formed address option */ 2820 continue; 2821 } 2822 if (debug) 2823 addlog(" [invalid]"); 2824 break; 2825 default: 2826 /* Others not supported. */ 2827 if (debug) 2828 addlog(" [rej]"); 2829 break; 2830 } 2831 /* Add the option to rejected list. */ 2832 bcopy (p, r, p[1]); 2833 r += p[1]; 2834 rlen += p[1]; 2835 } 2836 if (rlen) { 2837 if (debug) 2838 addlog(" send conf-rej\n"); 2839 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 2840 goto end; 2841 } else if (debug) 2842 addlog("\n"); 2843 2844 /* pass 2: parse option values */ 2845 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 2846 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 2847 else 2848 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 2849 if (debug) 2850 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ", 2851 SPP_ARGS(ifp)); 2852 p = (void*) (h+1); 2853 len = origlen; 2854 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2855 if (debug) 2856 addlog(" %s", sppp_ipcp_opt_name(*p)); 2857 switch (*p) { 2858 #ifdef notyet 2859 case IPCP_OPT_COMPRESSION: 2860 continue; 2861 #endif 2862 case IPCP_OPT_ADDRESS: 2863 desiredaddr = p[2] << 24 | p[3] << 16 | 2864 p[4] << 8 | p[5]; 2865 if (desiredaddr == hisaddr || 2866 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 2867 /* 2868 * Peer's address is same as our value, 2869 * this is agreeable. Gonna conf-ack 2870 * it. 2871 */ 2872 if (debug) 2873 addlog(" %s [ack]", 2874 sppp_dotted_quad(hisaddr)); 2875 /* record that we've seen it already */ 2876 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 2877 sp->ipcp.req_hisaddr = desiredaddr; 2878 hisaddr = desiredaddr; 2879 continue; 2880 } 2881 /* 2882 * The address wasn't agreeable. This is either 2883 * he sent us 0.0.0.0, asking to assign him an 2884 * address, or he send us another address not 2885 * matching our value. Either case, we gonna 2886 * conf-nak it with our value. 2887 */ 2888 if (debug) { 2889 if (desiredaddr == 0) 2890 addlog(" [addr requested]"); 2891 else 2892 addlog(" %s [not agreed]", 2893 sppp_dotted_quad(desiredaddr)); 2894 } 2895 2896 p[2] = hisaddr >> 24; 2897 p[3] = hisaddr >> 16; 2898 p[4] = hisaddr >> 8; 2899 p[5] = hisaddr; 2900 break; 2901 } 2902 /* Add the option to nak'ed list. */ 2903 bcopy (p, r, p[1]); 2904 r += p[1]; 2905 rlen += p[1]; 2906 } 2907 2908 /* 2909 * If we are about to conf-ack the request, but haven't seen 2910 * his address so far, gonna conf-nak it instead, with the 2911 * `address' option present and our idea of his address being 2912 * filled in there, to request negotiation of both addresses. 2913 * 2914 * XXX This can result in an endless req - nak loop if peer 2915 * doesn't want to send us his address. Q: What should we do 2916 * about it? XXX A: implement the max-failure counter. 2917 */ 2918 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 2919 buf[0] = IPCP_OPT_ADDRESS; 2920 buf[1] = 6; 2921 buf[2] = hisaddr >> 24; 2922 buf[3] = hisaddr >> 16; 2923 buf[4] = hisaddr >> 8; 2924 buf[5] = hisaddr; 2925 rlen = 6; 2926 if (debug) 2927 addlog(" still need hisaddr"); 2928 } 2929 2930 if (rlen) { 2931 if (debug) 2932 addlog(" send conf-nak\n"); 2933 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 2934 } else { 2935 if (debug) 2936 addlog(" send conf-ack\n"); 2937 sppp_cp_send (sp, PPP_IPCP, CONF_ACK, 2938 h->ident, origlen, h+1); 2939 } 2940 2941 end: 2942 free (buf, M_TEMP); 2943 return (rlen == 0); 2944 } 2945 2946 /* 2947 * Analyze the IPCP Configure-Reject option list, and adjust our 2948 * negotiation. 2949 */ 2950 static void 2951 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2952 { 2953 u_char *buf, *p; 2954 struct ifnet *ifp = &sp->pp_if; 2955 int debug = ifp->if_flags & IFF_DEBUG; 2956 2957 len -= 4; 2958 buf = malloc (len, M_TEMP, M_NOWAIT); 2959 if (!buf) 2960 return; 2961 2962 if (debug) 2963 log(LOG_DEBUG, SPP_FMT "ipcp rej opts:", 2964 SPP_ARGS(ifp)); 2965 2966 p = (void*) (h+1); 2967 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2968 if (debug) 2969 addlog(" %s", sppp_ipcp_opt_name(*p)); 2970 switch (*p) { 2971 case IPCP_OPT_ADDRESS: 2972 /* 2973 * Peer doesn't grok address option. This is 2974 * bad. XXX Should we better give up here? 2975 */ 2976 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 2977 break; 2978 #ifdef notyet 2979 case IPCP_OPT_COMPRESS: 2980 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 2981 break; 2982 #endif 2983 } 2984 } 2985 if (debug) 2986 addlog("\n"); 2987 free (buf, M_TEMP); 2988 return; 2989 } 2990 2991 /* 2992 * Analyze the IPCP Configure-NAK option list, and adjust our 2993 * negotiation. 2994 */ 2995 static void 2996 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2997 { 2998 u_char *p; 2999 struct ifnet *ifp = &sp->pp_if; 3000 int debug = ifp->if_flags & IFF_DEBUG; 3001 u_int32_t wantaddr; 3002 3003 len -= 4; 3004 3005 if (debug) 3006 log(LOG_DEBUG, SPP_FMT "ipcp nak opts:", 3007 SPP_ARGS(ifp)); 3008 3009 p = (void*) (h+1); 3010 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3011 if (debug) 3012 addlog(" %s", sppp_ipcp_opt_name(*p)); 3013 switch (*p) { 3014 case IPCP_OPT_ADDRESS: 3015 /* 3016 * Peer doesn't like our local IP address. See 3017 * if we can do something for him. We'll drop 3018 * him our address then. 3019 */ 3020 if (len >= 6 && p[1] == 6) { 3021 wantaddr = p[2] << 24 | p[3] << 16 | 3022 p[4] << 8 | p[5]; 3023 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3024 if (debug) 3025 addlog(" [wantaddr %s]", 3026 sppp_dotted_quad(wantaddr)); 3027 /* 3028 * When doing dynamic address assignment, 3029 * we accept his offer. Otherwise, we 3030 * ignore it and thus continue to negotiate 3031 * our already existing value. 3032 */ 3033 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3034 if (debug) 3035 addlog(" [agree]"); 3036 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3037 sp->ipcp.req_myaddr = wantaddr; 3038 } 3039 } 3040 break; 3041 3042 case IPCP_OPT_PRIMDNS: 3043 if (len >= 6 && p[1] == 6) { 3044 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3045 p[4] << 8 | p[5]; 3046 } 3047 break; 3048 3049 case IPCP_OPT_SECDNS: 3050 if (len >= 6 && p[1] == 6) { 3051 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3052 p[4] << 8 | p[5]; 3053 } 3054 break; 3055 #ifdef notyet 3056 case IPCP_OPT_COMPRESS: 3057 /* 3058 * Peer wants different compression parameters. 3059 */ 3060 break; 3061 #endif 3062 } 3063 } 3064 if (debug) 3065 addlog("\n"); 3066 return; 3067 } 3068 3069 static void 3070 sppp_ipcp_tlu(struct sppp *sp) 3071 { 3072 /* we are up. Set addresses and notify anyone interested */ 3073 u_int32_t myaddr, hisaddr; 3074 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3075 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 3076 myaddr = sp->ipcp.req_myaddr; 3077 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 3078 hisaddr = sp->ipcp.req_hisaddr; 3079 sppp_set_ip_addrs(sp, myaddr, hisaddr); 3080 if (sp->pp_con) 3081 sp->pp_con(sp); 3082 } 3083 3084 static void 3085 sppp_ipcp_tld(struct sppp *sp) 3086 { 3087 } 3088 3089 static void 3090 sppp_ipcp_tls(struct sppp *sp) 3091 { 3092 /* indicate to LCP that it must stay alive */ 3093 sp->lcp.protos |= (1 << IDX_IPCP); 3094 } 3095 3096 static void 3097 sppp_ipcp_tlf(struct sppp *sp) 3098 { 3099 /* we no longer need LCP */ 3100 sp->lcp.protos &= ~(1 << IDX_IPCP); 3101 } 3102 3103 static void 3104 sppp_ipcp_scr(struct sppp *sp) 3105 { 3106 char opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3107 u_int32_t ouraddr; 3108 int i = 0; 3109 3110 #ifdef notyet 3111 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3112 opt[i++] = IPCP_OPT_COMPRESSION; 3113 opt[i++] = 6; 3114 opt[i++] = 0; /* VJ header compression */ 3115 opt[i++] = 0x2d; /* VJ header compression */ 3116 opt[i++] = max_slot_id; 3117 opt[i++] = comp_slot_id; 3118 } 3119 #endif 3120 3121 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3122 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3123 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3124 else 3125 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3126 opt[i++] = IPCP_OPT_ADDRESS; 3127 opt[i++] = 6; 3128 opt[i++] = ouraddr >> 24; 3129 opt[i++] = ouraddr >> 16; 3130 opt[i++] = ouraddr >> 8; 3131 opt[i++] = ouraddr; 3132 } 3133 3134 if (sp->query_dns & 1) { 3135 opt[i++] = IPCP_OPT_PRIMDNS; 3136 opt[i++] = 6; 3137 opt[i++] = sp->dns_addrs[0] >> 24; 3138 opt[i++] = sp->dns_addrs[0] >> 16; 3139 opt[i++] = sp->dns_addrs[0] >> 8; 3140 opt[i++] = sp->dns_addrs[0]; 3141 } 3142 if (sp->query_dns & 2) { 3143 opt[i++] = IPCP_OPT_SECDNS; 3144 opt[i++] = 6; 3145 opt[i++] = sp->dns_addrs[1] >> 24; 3146 opt[i++] = sp->dns_addrs[1] >> 16; 3147 opt[i++] = sp->dns_addrs[1] >> 8; 3148 opt[i++] = sp->dns_addrs[1]; 3149 } 3150 3151 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3152 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3153 } 3154 3155 3156 /* 3157 *--------------------------------------------------------------------------* 3158 * * 3159 * The IPv6CP implementation. * 3160 * * 3161 *--------------------------------------------------------------------------* 3162 */ 3163 3164 #ifdef INET6 3165 static void 3166 sppp_ipv6cp_init(struct sppp *sp) 3167 { 3168 sp->ipv6cp.opts = 0; 3169 sp->ipv6cp.flags = 0; 3170 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3171 sp->fail_counter[IDX_IPV6CP] = 0; 3172 sp->pp_seq[IDX_IPV6CP] = 0; 3173 sp->pp_rseq[IDX_IPV6CP] = 0; 3174 callout_init(&sp->ch[IDX_IPV6CP]); 3175 } 3176 3177 static void 3178 sppp_ipv6cp_up(struct sppp *sp) 3179 { 3180 sppp_up_event(&ipv6cp, sp); 3181 } 3182 3183 static void 3184 sppp_ipv6cp_down(struct sppp *sp) 3185 { 3186 sppp_down_event(&ipv6cp, sp); 3187 } 3188 3189 static void 3190 sppp_ipv6cp_open(struct sppp *sp) 3191 { 3192 STDDCL; 3193 struct in6_addr myaddr, hisaddr; 3194 3195 #ifdef IPV6CP_MYIFID_DYN 3196 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3197 #else 3198 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3199 #endif 3200 3201 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3202 /* 3203 * If we don't have our address, this probably means our 3204 * interface doesn't want to talk IPv6 at all. (This could 3205 * be the case if somebody wants to speak only IPX, for 3206 * example.) Don't open IPv6CP in this case. 3207 */ 3208 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3209 /* XXX this message should go away */ 3210 if (debug) 3211 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n", 3212 SPP_ARGS(ifp)); 3213 return; 3214 } 3215 3216 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3217 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3218 sppp_open_event(&ipv6cp, sp); 3219 } 3220 3221 static void 3222 sppp_ipv6cp_close(struct sppp *sp) 3223 { 3224 sppp_close_event(&ipv6cp, sp); 3225 } 3226 3227 static void 3228 sppp_ipv6cp_TO(void *cookie) 3229 { 3230 sppp_to_event(&ipv6cp, (struct sppp *)cookie); 3231 } 3232 3233 /* 3234 * Analyze a configure request. Return true if it was agreeable, and 3235 * caused action sca, false if it has been rejected or nak'ed, and 3236 * caused action scn. (The return value is used to make the state 3237 * transition decision in the state automaton.) 3238 */ 3239 static int 3240 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3241 { 3242 u_char *buf, *r, *p; 3243 struct ifnet *ifp = &sp->pp_if; 3244 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3245 struct in6_addr myaddr, desiredaddr, suggestaddr; 3246 int ifidcount; 3247 int type; 3248 int collision, nohisaddr; 3249 3250 len -= 4; 3251 origlen = len; 3252 /* 3253 * Make sure to allocate a buf that can at least hold a 3254 * conf-nak with an `address' option. We might need it below. 3255 */ 3256 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 3257 if (! buf) 3258 return (0); 3259 3260 /* pass 1: see if we can recognize them */ 3261 if (debug) 3262 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:", 3263 SPP_ARGS(ifp)); 3264 p = (void*) (h+1); 3265 ifidcount = 0; 3266 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3267 if (debug) 3268 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3269 switch (*p) { 3270 case IPV6CP_OPT_IFID: 3271 if (len >= 10 && p[1] == 10 && ifidcount == 0) { 3272 /* correctly formed address option */ 3273 ifidcount++; 3274 continue; 3275 } 3276 if (debug) 3277 addlog(" [invalid]"); 3278 break; 3279 #ifdef notyet 3280 case IPV6CP_OPT_COMPRESSION: 3281 if (len >= 4 && p[1] >= 4) { 3282 /* correctly formed compress option */ 3283 continue; 3284 } 3285 if (debug) 3286 addlog(" [invalid]"); 3287 break; 3288 #endif 3289 default: 3290 /* Others not supported. */ 3291 if (debug) 3292 addlog(" [rej]"); 3293 break; 3294 } 3295 /* Add the option to rejected list. */ 3296 bcopy (p, r, p[1]); 3297 r += p[1]; 3298 rlen += p[1]; 3299 } 3300 if (rlen) { 3301 if (debug) 3302 addlog(" send conf-rej\n"); 3303 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3304 goto end; 3305 } else if (debug) 3306 addlog("\n"); 3307 3308 /* pass 2: parse option values */ 3309 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3310 if (debug) 3311 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ", 3312 SPP_ARGS(ifp)); 3313 p = (void*) (h+1); 3314 len = origlen; 3315 type = CONF_ACK; 3316 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3317 if (debug) 3318 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3319 switch (*p) { 3320 #ifdef notyet 3321 case IPV6CP_OPT_COMPRESSION: 3322 continue; 3323 #endif 3324 case IPV6CP_OPT_IFID: 3325 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3326 bcopy(&p[2], &desiredaddr.s6_addr[8], 8); 3327 collision = (memcmp(&desiredaddr.s6_addr[8], 3328 &myaddr.s6_addr[8], 8) == 0); 3329 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3330 3331 desiredaddr.s6_addr16[0] = htons(0xfe80); 3332 desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3333 3334 if (!collision && !nohisaddr) { 3335 /* no collision, hisaddr known - Conf-Ack */ 3336 type = CONF_ACK; 3337 3338 if (debug) { 3339 addlog(" %s [%s]", 3340 ip6_sprintf(&desiredaddr), 3341 sppp_cp_type_name(type)); 3342 } 3343 continue; 3344 } 3345 3346 memset(&suggestaddr, 0, sizeof(&suggestaddr)); 3347 if (collision && nohisaddr) { 3348 /* collision, hisaddr unknown - Conf-Rej */ 3349 type = CONF_REJ; 3350 memset(&p[2], 0, 8); 3351 } else { 3352 /* 3353 * - no collision, hisaddr unknown, or 3354 * - collision, hisaddr known 3355 * Conf-Nak, suggest hisaddr 3356 */ 3357 type = CONF_NAK; 3358 sppp_suggest_ip6_addr(sp, &suggestaddr); 3359 bcopy(&suggestaddr.s6_addr[8], &p[2], 8); 3360 } 3361 if (debug) 3362 addlog(" %s [%s]", ip6_sprintf(&desiredaddr), 3363 sppp_cp_type_name(type)); 3364 break; 3365 } 3366 /* Add the option to nak'ed list. */ 3367 bcopy (p, r, p[1]); 3368 r += p[1]; 3369 rlen += p[1]; 3370 } 3371 3372 if (rlen == 0 && type == CONF_ACK) { 3373 if (debug) 3374 addlog(" send %s\n", sppp_cp_type_name(type)); 3375 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1); 3376 } else { 3377 #ifdef DIAGNOSTIC 3378 if (type == CONF_ACK) 3379 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3380 #endif 3381 3382 if (debug) { 3383 addlog(" send %s suggest %s\n", 3384 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr)); 3385 } 3386 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3387 } 3388 3389 end: 3390 free (buf, M_TEMP); 3391 return (rlen == 0); 3392 } 3393 3394 /* 3395 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3396 * negotiation. 3397 */ 3398 static void 3399 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3400 { 3401 u_char *buf, *p; 3402 struct ifnet *ifp = &sp->pp_if; 3403 int debug = ifp->if_flags & IFF_DEBUG; 3404 3405 len -= 4; 3406 buf = malloc (len, M_TEMP, M_NOWAIT); 3407 if (!buf) 3408 return; 3409 3410 if (debug) 3411 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:", 3412 SPP_ARGS(ifp)); 3413 3414 p = (void*) (h+1); 3415 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3416 if (debug) 3417 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3418 switch (*p) { 3419 case IPV6CP_OPT_IFID: 3420 /* 3421 * Peer doesn't grok address option. This is 3422 * bad. XXX Should we better give up here? 3423 */ 3424 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3425 break; 3426 #ifdef notyet 3427 case IPV6CP_OPT_COMPRESS: 3428 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3429 break; 3430 #endif 3431 } 3432 } 3433 if (debug) 3434 addlog("\n"); 3435 free (buf, M_TEMP); 3436 return; 3437 } 3438 3439 /* 3440 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3441 * negotiation. 3442 */ 3443 static void 3444 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3445 { 3446 u_char *buf, *p; 3447 struct ifnet *ifp = &sp->pp_if; 3448 int debug = ifp->if_flags & IFF_DEBUG; 3449 struct in6_addr suggestaddr; 3450 3451 len -= 4; 3452 buf = malloc (len, M_TEMP, M_NOWAIT); 3453 if (!buf) 3454 return; 3455 3456 if (debug) 3457 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:", 3458 SPP_ARGS(ifp)); 3459 3460 p = (void*) (h+1); 3461 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3462 if (debug) 3463 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3464 switch (*p) { 3465 case IPV6CP_OPT_IFID: 3466 /* 3467 * Peer doesn't like our local ifid. See 3468 * if we can do something for him. We'll drop 3469 * him our address then. 3470 */ 3471 if (len < 10 || p[1] != 10) 3472 break; 3473 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3474 suggestaddr.s6_addr16[0] = htons(0xfe80); 3475 suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3476 bcopy(&p[2], &suggestaddr.s6_addr[8], 8); 3477 3478 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3479 if (debug) 3480 addlog(" [suggestaddr %s]", 3481 ip6_sprintf(&suggestaddr)); 3482 #ifdef IPV6CP_MYIFID_DYN 3483 /* 3484 * When doing dynamic address assignment, 3485 * we accept his offer. 3486 */ 3487 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3488 struct in6_addr lastsuggest; 3489 /* 3490 * If <suggested myaddr from peer> equals to 3491 * <hisaddr we have suggested last time>, 3492 * we have a collision. generate new random 3493 * ifid. 3494 */ 3495 sppp_suggest_ip6_addr(&lastsuggest); 3496 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3497 lastsuggest)) { 3498 if (debug) 3499 addlog(" [random]"); 3500 sppp_gen_ip6_addr(sp, &suggestaddr); 3501 } 3502 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3503 if (debug) 3504 addlog(" [agree]"); 3505 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3506 } 3507 #else 3508 /* 3509 * Since we do not do dynamic address assignment, 3510 * we ignore it and thus continue to negotiate 3511 * our already existing value. This can possibly 3512 * go into infinite request-reject loop. 3513 * 3514 * This is not likely because we normally use 3515 * ifid based on MAC-address. 3516 * If you have no ethernet card on the node, too bad. 3517 * XXX should we use fail_counter? 3518 */ 3519 #endif 3520 break; 3521 #ifdef notyet 3522 case IPV6CP_OPT_COMPRESS: 3523 /* 3524 * Peer wants different compression parameters. 3525 */ 3526 break; 3527 #endif 3528 } 3529 } 3530 if (debug) 3531 addlog("\n"); 3532 free (buf, M_TEMP); 3533 return; 3534 } 3535 3536 static void 3537 sppp_ipv6cp_tlu(struct sppp *sp) 3538 { 3539 /* we are up - notify isdn daemon */ 3540 if (sp->pp_con) 3541 sp->pp_con(sp); 3542 } 3543 3544 static void 3545 sppp_ipv6cp_tld(struct sppp *sp) 3546 { 3547 } 3548 3549 static void 3550 sppp_ipv6cp_tls(struct sppp *sp) 3551 { 3552 /* indicate to LCP that it must stay alive */ 3553 sp->lcp.protos |= (1 << IDX_IPV6CP); 3554 } 3555 3556 static void 3557 sppp_ipv6cp_tlf(struct sppp *sp) 3558 { 3559 /* we no longer need LCP */ 3560 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3561 } 3562 3563 static void 3564 sppp_ipv6cp_scr(struct sppp *sp) 3565 { 3566 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3567 struct in6_addr ouraddr; 3568 int i = 0; 3569 3570 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3571 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3572 opt[i++] = IPV6CP_OPT_IFID; 3573 opt[i++] = 10; 3574 bcopy(&ouraddr.s6_addr[8], &opt[i], 8); 3575 i += 8; 3576 } 3577 3578 #ifdef notyet 3579 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 3580 opt[i++] = IPV6CP_OPT_COMPRESSION; 3581 opt[i++] = 4; 3582 opt[i++] = 0; /* TBD */ 3583 opt[i++] = 0; /* TBD */ 3584 /* variable length data may follow */ 3585 } 3586 #endif 3587 3588 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 3589 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 3590 } 3591 #else /*INET6*/ 3592 static void sppp_ipv6cp_init(struct sppp *sp) 3593 { 3594 } 3595 3596 static void sppp_ipv6cp_up(struct sppp *sp) 3597 { 3598 } 3599 3600 static void sppp_ipv6cp_down(struct sppp *sp) 3601 { 3602 } 3603 3604 3605 static void sppp_ipv6cp_open(struct sppp *sp) 3606 { 3607 } 3608 3609 static void sppp_ipv6cp_close(struct sppp *sp) 3610 { 3611 } 3612 3613 static void sppp_ipv6cp_TO(void *sp) 3614 { 3615 } 3616 3617 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3618 { 3619 return 0; 3620 } 3621 3622 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3623 { 3624 } 3625 3626 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3627 { 3628 } 3629 3630 static void sppp_ipv6cp_tlu(struct sppp *sp) 3631 { 3632 } 3633 3634 static void sppp_ipv6cp_tld(struct sppp *sp) 3635 { 3636 } 3637 3638 static void sppp_ipv6cp_tls(struct sppp *sp) 3639 { 3640 } 3641 3642 static void sppp_ipv6cp_tlf(struct sppp *sp) 3643 { 3644 } 3645 3646 static void sppp_ipv6cp_scr(struct sppp *sp) 3647 { 3648 } 3649 #endif /*INET6*/ 3650 3651 3652 /* 3653 *--------------------------------------------------------------------------* 3654 * * 3655 * The CHAP implementation. * 3656 * * 3657 *--------------------------------------------------------------------------* 3658 */ 3659 3660 /* 3661 * The authentication protocols don't employ a full-fledged state machine as 3662 * the control protocols do, since they do have Open and Close events, but 3663 * not Up and Down, nor are they explicitly terminated. Also, use of the 3664 * authentication protocols may be different in both directions (this makes 3665 * sense, think of a machine that never accepts incoming calls but only 3666 * calls out, it doesn't require the called party to authenticate itself). 3667 * 3668 * Our state machine for the local authentication protocol (we are requesting 3669 * the peer to authenticate) looks like: 3670 * 3671 * RCA- 3672 * +--------------------------------------------+ 3673 * V scn,tld| 3674 * +--------+ Close +---------+ RCA+ 3675 * | |<----------------------------------| |------+ 3676 * +--->| Closed | TO* | Opened | sca | 3677 * | | |-----+ +-------| |<-----+ 3678 * | +--------+ irc | | +---------+ 3679 * | ^ | | ^ 3680 * | | | | | 3681 * | | | | | 3682 * | TO-| | | | 3683 * | |tld TO+ V | | 3684 * | | +------->+ | | 3685 * | | | | | | 3686 * | +--------+ V | | 3687 * | | |<----+<--------------------+ | 3688 * | | Req- | scr | 3689 * | | Sent | | 3690 * | | | | 3691 * | +--------+ | 3692 * | RCA- | | RCA+ | 3693 * +------+ +------------------------------------------+ 3694 * scn,tld sca,irc,ict,tlu 3695 * 3696 * 3697 * with: 3698 * 3699 * Open: LCP reached authentication phase 3700 * Close: LCP reached terminate phase 3701 * 3702 * RCA+: received reply (pap-req, chap-response), acceptable 3703 * RCN: received reply (pap-req, chap-response), not acceptable 3704 * TO+: timeout with restart counter >= 0 3705 * TO-: timeout with restart counter < 0 3706 * TO*: reschedule timeout for CHAP 3707 * 3708 * scr: send request packet (none for PAP, chap-challenge) 3709 * sca: send ack packet (pap-ack, chap-success) 3710 * scn: send nak packet (pap-nak, chap-failure) 3711 * ict: initialize re-challenge timer (CHAP only) 3712 * 3713 * tlu: this-layer-up, LCP reaches network phase 3714 * tld: this-layer-down, LCP enters terminate phase 3715 * 3716 * Note that in CHAP mode, after sending a new challenge, while the state 3717 * automaton falls back into Req-Sent state, it doesn't signal a tld 3718 * event to LCP, so LCP remains in network phase. Only after not getting 3719 * any response (or after getting an unacceptable response), CHAP closes, 3720 * causing LCP to enter terminate phase. 3721 * 3722 * With PAP, there is no initial request that can be sent. The peer is 3723 * expected to send one based on the successful negotiation of PAP as 3724 * the authentication protocol during the LCP option negotiation. 3725 * 3726 * Incoming authentication protocol requests (remote requests 3727 * authentication, we are peer) don't employ a state machine at all, 3728 * they are simply answered. Some peers [Ascend P50 firmware rev 3729 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 3730 * still in authentication phase (thereby violating the standard that 3731 * demands that these NCP packets are to be discarded), so we keep 3732 * track of the peer demanding us to authenticate, and only proceed to 3733 * phase network once we've seen a positive acknowledge for the 3734 * authentication. 3735 */ 3736 3737 /* 3738 * Handle incoming CHAP packets. 3739 */ 3740 void 3741 sppp_chap_input(struct sppp *sp, struct mbuf *m) 3742 { 3743 STDDCL; 3744 struct lcp_header *h; 3745 int len, x; 3746 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 3747 int value_len, name_len; 3748 MD5_CTX ctx; 3749 3750 len = m->m_pkthdr.len; 3751 if (len < 4) { 3752 if (debug) 3753 log(LOG_DEBUG, 3754 SPP_FMT "chap invalid packet length: %d bytes\n", 3755 SPP_ARGS(ifp), len); 3756 return; 3757 } 3758 h = mtod (m, struct lcp_header*); 3759 if (len > ntohs (h->len)) 3760 len = ntohs (h->len); 3761 3762 switch (h->type) { 3763 /* challenge, failure and success are his authproto */ 3764 case CHAP_CHALLENGE: 3765 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 3766 /* can't do anything usefull */ 3767 sp->pp_auth_failures++; 3768 printf(SPP_FMT "chap input without my name and my secret being set\n", 3769 SPP_ARGS(ifp)); 3770 break; 3771 } 3772 value = 1 + (u_char*)(h+1); 3773 value_len = value[-1]; 3774 name = value + value_len; 3775 name_len = len - value_len - 5; 3776 if (name_len < 0) { 3777 if (debug) { 3778 log(LOG_DEBUG, 3779 SPP_FMT "chap corrupted challenge " 3780 "<%s id=0x%x len=%d", 3781 SPP_ARGS(ifp), 3782 sppp_auth_type_name(PPP_CHAP, h->type), 3783 h->ident, ntohs(h->len)); 3784 if (len > 4) 3785 sppp_print_bytes((u_char*) (h+1), len-4); 3786 addlog(">\n"); 3787 } 3788 break; 3789 } 3790 3791 if (debug) { 3792 log(LOG_DEBUG, 3793 SPP_FMT "chap input <%s id=0x%x len=%d name=", 3794 SPP_ARGS(ifp), 3795 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 3796 ntohs(h->len)); 3797 sppp_print_string((char*) name, name_len); 3798 addlog(" value-size=%d value=", value_len); 3799 sppp_print_bytes(value, value_len); 3800 addlog(">\n"); 3801 } 3802 3803 /* Compute reply value. */ 3804 MD5Init(&ctx); 3805 MD5Update(&ctx, &h->ident, 1); 3806 MD5Update(&ctx, sp->myauth.secret, strlen(sp->myauth.secret)); 3807 MD5Update(&ctx, value, value_len); 3808 MD5Final(digest, &ctx); 3809 dsize = sizeof digest; 3810 3811 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 3812 sizeof dsize, (const char *)&dsize, 3813 sizeof digest, digest, 3814 strlen(sp->myauth.name), 3815 sp->myauth.name, 3816 0); 3817 break; 3818 3819 case CHAP_SUCCESS: 3820 if (debug) { 3821 log(LOG_DEBUG, SPP_FMT "chap success", 3822 SPP_ARGS(ifp)); 3823 if (len > 4) { 3824 addlog(": "); 3825 sppp_print_string((char*)(h + 1), len - 4); 3826 } 3827 addlog("\n"); 3828 } 3829 x = splnet(); 3830 sp->pp_auth_failures = 0; 3831 sp->pp_flags &= ~PP_NEEDAUTH; 3832 if (sp->myauth.proto == PPP_CHAP && 3833 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 3834 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 3835 /* 3836 * We are authenticator for CHAP but didn't 3837 * complete yet. Leave it to tlu to proceed 3838 * to network phase. 3839 */ 3840 splx(x); 3841 break; 3842 } 3843 splx(x); 3844 sppp_phase_network(sp); 3845 break; 3846 3847 case CHAP_FAILURE: 3848 x = splnet(); 3849 sp->pp_auth_failures++; 3850 splx(x); 3851 if (debug) { 3852 log(LOG_INFO, SPP_FMT "chap failure", 3853 SPP_ARGS(ifp)); 3854 if (len > 4) { 3855 addlog(": "); 3856 sppp_print_string((char*)(h + 1), len - 4); 3857 } 3858 addlog("\n"); 3859 } else 3860 log(LOG_INFO, SPP_FMT "chap failure\n", 3861 SPP_ARGS(ifp)); 3862 /* await LCP shutdown by authenticator */ 3863 break; 3864 3865 /* response is my authproto */ 3866 case CHAP_RESPONSE: 3867 if (sp->hisauth.secret == NULL) { 3868 /* can't do anything usefull */ 3869 printf(SPP_FMT "chap input without his secret being set\n", 3870 SPP_ARGS(ifp)); 3871 break; 3872 } 3873 value = 1 + (u_char*)(h+1); 3874 value_len = value[-1]; 3875 name = value + value_len; 3876 name_len = len - value_len - 5; 3877 if (name_len < 0) { 3878 if (debug) { 3879 log(LOG_DEBUG, 3880 SPP_FMT "chap corrupted response " 3881 "<%s id=0x%x len=%d", 3882 SPP_ARGS(ifp), 3883 sppp_auth_type_name(PPP_CHAP, h->type), 3884 h->ident, ntohs(h->len)); 3885 if (len > 4) 3886 sppp_print_bytes((u_char*)(h+1), len-4); 3887 addlog(">\n"); 3888 } 3889 break; 3890 } 3891 if (h->ident != sp->confid[IDX_CHAP]) { 3892 if (debug) 3893 log(LOG_DEBUG, 3894 SPP_FMT "chap dropping response for old ID " 3895 "(got %d, expected %d)\n", 3896 SPP_ARGS(ifp), 3897 h->ident, sp->confid[IDX_CHAP]); 3898 break; 3899 } 3900 if (sp->hisauth.name != NULL && 3901 (name_len != strlen(sp->hisauth.name) 3902 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 3903 log(LOG_INFO, SPP_FMT "chap response, his name ", 3904 SPP_ARGS(ifp)); 3905 sppp_print_string(name, name_len); 3906 addlog(" != expected "); 3907 sppp_print_string(sp->hisauth.name, 3908 strlen(sp->hisauth.name)); 3909 addlog("\n"); 3910 goto chap_failure; 3911 } 3912 if (debug) { 3913 log(LOG_DEBUG, SPP_FMT "chap input(%s) " 3914 "<%s id=0x%x len=%d name=", 3915 SPP_ARGS(ifp), 3916 sppp_state_name(sp->state[IDX_CHAP]), 3917 sppp_auth_type_name(PPP_CHAP, h->type), 3918 h->ident, ntohs (h->len)); 3919 sppp_print_string((char*)name, name_len); 3920 addlog(" value-size=%d value=", value_len); 3921 sppp_print_bytes(value, value_len); 3922 addlog(">\n"); 3923 } 3924 if (value_len != sizeof(sp->myauth.challenge)) { 3925 if (debug) 3926 log(LOG_DEBUG, 3927 SPP_FMT "chap bad hash value length: " 3928 "%d bytes, should be %ld\n", 3929 SPP_ARGS(ifp), value_len, 3930 (long) sizeof(sp->myauth.challenge)); 3931 goto chap_failure; 3932 } 3933 3934 MD5Init(&ctx); 3935 MD5Update(&ctx, &h->ident, 1); 3936 MD5Update(&ctx, sp->hisauth.secret, 3937 strlen(sp->hisauth.secret)); 3938 MD5Update(&ctx, sp->myauth.challenge, sizeof(sp->myauth.challenge)); 3939 MD5Final(digest, &ctx); 3940 3941 #define FAILMSG "Failed..." 3942 #define SUCCMSG "Welcome!" 3943 3944 if (value_len != sizeof digest || 3945 memcmp(digest, value, value_len) != 0) { 3946 chap_failure: 3947 /* action scn, tld */ 3948 x = splnet(); 3949 sp->pp_auth_failures++; 3950 splx(x); 3951 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 3952 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 3953 0); 3954 chap.tld(sp); 3955 break; 3956 } 3957 sp->pp_auth_failures = 0; 3958 /* action sca, perhaps tlu */ 3959 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 3960 sp->state[IDX_CHAP] == STATE_OPENED) 3961 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 3962 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 3963 0); 3964 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 3965 sppp_cp_change_state(&chap, sp, STATE_OPENED); 3966 chap.tlu(sp); 3967 } 3968 break; 3969 3970 default: 3971 /* Unknown CHAP packet type -- ignore. */ 3972 if (debug) { 3973 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) " 3974 "<0x%x id=0x%xh len=%d", 3975 SPP_ARGS(ifp), 3976 sppp_state_name(sp->state[IDX_CHAP]), 3977 h->type, h->ident, ntohs(h->len)); 3978 if (len > 4) 3979 sppp_print_bytes((u_char*)(h+1), len-4); 3980 addlog(">\n"); 3981 } 3982 break; 3983 3984 } 3985 } 3986 3987 static void 3988 sppp_chap_init(struct sppp *sp) 3989 { 3990 /* Chap doesn't have STATE_INITIAL at all. */ 3991 sp->state[IDX_CHAP] = STATE_CLOSED; 3992 sp->fail_counter[IDX_CHAP] = 0; 3993 sp->pp_seq[IDX_CHAP] = 0; 3994 sp->pp_rseq[IDX_CHAP] = 0; 3995 callout_init(&sp->ch[IDX_CHAP]); 3996 } 3997 3998 static void 3999 sppp_chap_open(struct sppp *sp) 4000 { 4001 if (sp->myauth.proto == PPP_CHAP && 4002 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4003 /* we are authenticator for CHAP, start it */ 4004 chap.scr(sp); 4005 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4006 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4007 } 4008 /* nothing to be done if we are peer, await a challenge */ 4009 } 4010 4011 static void 4012 sppp_chap_close(struct sppp *sp) 4013 { 4014 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4015 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4016 } 4017 4018 static void 4019 sppp_chap_TO(void *cookie) 4020 { 4021 struct sppp *sp = (struct sppp *)cookie; 4022 STDDCL; 4023 int s; 4024 4025 s = splnet(); 4026 if (debug) 4027 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n", 4028 SPP_ARGS(ifp), 4029 sppp_state_name(sp->state[IDX_CHAP]), 4030 sp->rst_counter[IDX_CHAP]); 4031 4032 if (--sp->rst_counter[IDX_CHAP] < 0) 4033 /* TO- event */ 4034 switch (sp->state[IDX_CHAP]) { 4035 case STATE_REQ_SENT: 4036 chap.tld(sp); 4037 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4038 break; 4039 } 4040 else 4041 /* TO+ (or TO*) event */ 4042 switch (sp->state[IDX_CHAP]) { 4043 case STATE_OPENED: 4044 /* TO* event */ 4045 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4046 /* fall through */ 4047 case STATE_REQ_SENT: 4048 chap.scr(sp); 4049 /* sppp_cp_change_state() will restart the timer */ 4050 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4051 break; 4052 } 4053 4054 splx(s); 4055 } 4056 4057 static void 4058 sppp_chap_tlu(struct sppp *sp) 4059 { 4060 STDDCL; 4061 int i, x; 4062 4063 i = 0; 4064 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4065 4066 /* 4067 * Some broken CHAP implementations (Conware CoNet, firmware 4068 * 4.0.?) don't want to re-authenticate their CHAP once the 4069 * initial challenge-response exchange has taken place. 4070 * Provide for an option to avoid rechallenges. 4071 */ 4072 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4073 /* 4074 * Compute the re-challenge timeout. This will yield 4075 * a number between 300 and 810 seconds. 4076 */ 4077 i = 300 + ((unsigned)(random() & 0xff00) >> 7); 4078 4079 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4080 } 4081 4082 if (debug) { 4083 log(LOG_DEBUG, 4084 SPP_FMT "chap %s, ", 4085 SPP_ARGS(ifp), 4086 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu"); 4087 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) 4088 addlog("next re-challenge in %d seconds\n", i); 4089 else 4090 addlog("re-challenging supressed\n"); 4091 } 4092 4093 x = splnet(); 4094 sp->pp_auth_failures = 0; 4095 /* indicate to LCP that we need to be closed down */ 4096 sp->lcp.protos |= (1 << IDX_CHAP); 4097 4098 if (sp->pp_flags & PP_NEEDAUTH) { 4099 /* 4100 * Remote is authenticator, but his auth proto didn't 4101 * complete yet. Defer the transition to network 4102 * phase. 4103 */ 4104 splx(x); 4105 return; 4106 } 4107 splx(x); 4108 4109 /* 4110 * If we are already in phase network, we are done here. This 4111 * is the case if this is a dummy tlu event after a re-challenge. 4112 */ 4113 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4114 sppp_phase_network(sp); 4115 } 4116 4117 static void 4118 sppp_chap_tld(struct sppp *sp) 4119 { 4120 STDDCL; 4121 4122 if (debug) 4123 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp)); 4124 callout_stop(&sp->ch[IDX_CHAP]); 4125 sp->lcp.protos &= ~(1 << IDX_CHAP); 4126 4127 lcp.Close(sp); 4128 } 4129 4130 static void 4131 sppp_chap_scr(struct sppp *sp) 4132 { 4133 struct timeval tv; 4134 u_int32_t *ch, seed; 4135 u_char clen; 4136 4137 if (sp->myauth.name == NULL) { 4138 /* can't do anything usefull */ 4139 printf(SPP_FMT "chap starting without my name being set\n", 4140 SPP_ARGS(&sp->pp_if)); 4141 return; 4142 } 4143 4144 /* Compute random challenge. */ 4145 ch = (u_int32_t *)sp->myauth.challenge; 4146 microtime(&tv); 4147 seed = tv.tv_sec ^ tv.tv_usec; 4148 ch[0] = seed ^ random(); 4149 ch[1] = seed ^ random(); 4150 ch[2] = seed ^ random(); 4151 ch[3] = seed ^ random(); 4152 clen = 16; /* 4 * sizeof(u_int32_t) */ 4153 4154 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4155 4156 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4157 sizeof clen, (const char *)&clen, 4158 sizeof(sp->myauth.challenge), sp->myauth.challenge, 4159 strlen(sp->myauth.name), 4160 sp->myauth.name, 4161 0); 4162 } 4163 4164 /* 4165 *--------------------------------------------------------------------------* 4166 * * 4167 * The PAP implementation. * 4168 * * 4169 *--------------------------------------------------------------------------* 4170 */ 4171 /* 4172 * For PAP, we need to keep a little state also if we are the peer, not the 4173 * authenticator. This is since we don't get a request to authenticate, but 4174 * have to repeatedly authenticate ourself until we got a response (or the 4175 * retry counter is expired). 4176 */ 4177 4178 /* 4179 * Handle incoming PAP packets. */ 4180 static void 4181 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4182 { 4183 STDDCL; 4184 struct lcp_header *h; 4185 int len, x; 4186 u_char mlen; 4187 char *name, *passwd; 4188 int name_len, passwd_len; 4189 4190 len = m->m_pkthdr.len; 4191 if (len < 5) { 4192 if (debug) 4193 log(LOG_DEBUG, 4194 SPP_FMT "pap invalid packet length: %d bytes\n", 4195 SPP_ARGS(ifp), len); 4196 return; 4197 } 4198 h = mtod (m, struct lcp_header*); 4199 if (len > ntohs (h->len)) 4200 len = ntohs (h->len); 4201 switch (h->type) { 4202 /* PAP request is my authproto */ 4203 case PAP_REQ: 4204 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4205 /* can't do anything usefull */ 4206 printf(SPP_FMT "pap request without his name and his secret being set\n", 4207 SPP_ARGS(ifp)); 4208 break; 4209 } 4210 name = 1 + (u_char*)(h+1); 4211 name_len = name[-1]; 4212 passwd = name + name_len + 1; 4213 if (name_len > len - 6 || 4214 (passwd_len = passwd[-1]) > len - 6 - name_len) { 4215 if (debug) { 4216 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4217 "<%s id=0x%x len=%d", 4218 SPP_ARGS(ifp), 4219 sppp_auth_type_name(PPP_PAP, h->type), 4220 h->ident, ntohs(h->len)); 4221 if (len > 4) 4222 sppp_print_bytes((u_char*)(h+1), len-4); 4223 addlog(">\n"); 4224 } 4225 break; 4226 } 4227 if (debug) { 4228 log(LOG_DEBUG, SPP_FMT "pap input(%s) " 4229 "<%s id=0x%x len=%d name=", 4230 SPP_ARGS(ifp), 4231 sppp_state_name(sp->state[IDX_PAP]), 4232 sppp_auth_type_name(PPP_PAP, h->type), 4233 h->ident, ntohs(h->len)); 4234 sppp_print_string((char*)name, name_len); 4235 addlog(" passwd="); 4236 sppp_print_string((char*)passwd, passwd_len); 4237 addlog(">\n"); 4238 } 4239 if (memcmp(name, sp->hisauth.name, name_len) != 0 || 4240 memcmp(passwd, sp->hisauth.secret, passwd_len) != 0) { 4241 /* action scn, tld */ 4242 sp->pp_auth_failures++; 4243 mlen = sizeof(FAILMSG) - 1; 4244 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4245 sizeof mlen, (const char *)&mlen, 4246 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 4247 0); 4248 pap.tld(sp); 4249 break; 4250 } 4251 /* action sca, perhaps tlu */ 4252 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4253 sp->state[IDX_PAP] == STATE_OPENED) { 4254 mlen = sizeof(SUCCMSG) - 1; 4255 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4256 sizeof mlen, (const char *)&mlen, 4257 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 4258 0); 4259 } 4260 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4261 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4262 pap.tlu(sp); 4263 } 4264 break; 4265 4266 /* ack and nak are his authproto */ 4267 case PAP_ACK: 4268 callout_stop(&sp->pap_my_to_ch); 4269 if (debug) { 4270 log(LOG_DEBUG, SPP_FMT "pap success", 4271 SPP_ARGS(ifp)); 4272 name_len = *(char *)h; 4273 if (len > 5 && name_len) { 4274 addlog(": "); 4275 sppp_print_string((char*)(h+1), name_len); 4276 } 4277 addlog("\n"); 4278 } 4279 x = splnet(); 4280 sp->pp_auth_failures = 0; 4281 sp->pp_flags &= ~PP_NEEDAUTH; 4282 if (sp->myauth.proto == PPP_PAP && 4283 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4284 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4285 /* 4286 * We are authenticator for PAP but didn't 4287 * complete yet. Leave it to tlu to proceed 4288 * to network phase. 4289 */ 4290 splx(x); 4291 break; 4292 } 4293 splx(x); 4294 sppp_phase_network(sp); 4295 break; 4296 4297 case PAP_NAK: 4298 callout_stop(&sp->pap_my_to_ch); 4299 sp->pp_auth_failures++; 4300 if (debug) { 4301 log(LOG_INFO, SPP_FMT "pap failure", 4302 SPP_ARGS(ifp)); 4303 name_len = *(char *)h; 4304 if (len > 5 && name_len) { 4305 addlog(": "); 4306 sppp_print_string((char*)(h+1), name_len); 4307 } 4308 addlog("\n"); 4309 } else 4310 log(LOG_INFO, SPP_FMT "pap failure\n", 4311 SPP_ARGS(ifp)); 4312 /* await LCP shutdown by authenticator */ 4313 break; 4314 4315 default: 4316 /* Unknown PAP packet type -- ignore. */ 4317 if (debug) { 4318 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4319 "<0x%x id=0x%x len=%d", 4320 SPP_ARGS(ifp), 4321 h->type, h->ident, ntohs(h->len)); 4322 if (len > 4) 4323 sppp_print_bytes((u_char*)(h+1), len-4); 4324 addlog(">\n"); 4325 } 4326 break; 4327 4328 } 4329 } 4330 4331 static void 4332 sppp_pap_init(struct sppp *sp) 4333 { 4334 /* PAP doesn't have STATE_INITIAL at all. */ 4335 sp->state[IDX_PAP] = STATE_CLOSED; 4336 sp->fail_counter[IDX_PAP] = 0; 4337 sp->pp_seq[IDX_PAP] = 0; 4338 sp->pp_rseq[IDX_PAP] = 0; 4339 callout_init(&sp->ch[IDX_PAP]); 4340 callout_init(&sp->pap_my_to_ch); 4341 } 4342 4343 static void 4344 sppp_pap_open(struct sppp *sp) 4345 { 4346 if (sp->hisauth.proto == PPP_PAP && 4347 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4348 /* we are authenticator for PAP, start our timer */ 4349 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4350 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4351 } 4352 if (sp->myauth.proto == PPP_PAP) { 4353 /* we are peer, send a request, and start a timer */ 4354 pap.scr(sp); 4355 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4356 sppp_pap_my_TO, sp); 4357 } 4358 } 4359 4360 static void 4361 sppp_pap_close(struct sppp *sp) 4362 { 4363 if (sp->state[IDX_PAP] != STATE_CLOSED) 4364 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4365 } 4366 4367 /* 4368 * That's the timeout routine if we are authenticator. Since the 4369 * authenticator is basically passive in PAP, we can't do much here. 4370 */ 4371 static void 4372 sppp_pap_TO(void *cookie) 4373 { 4374 struct sppp *sp = (struct sppp *)cookie; 4375 STDDCL; 4376 int s; 4377 4378 s = splnet(); 4379 if (debug) 4380 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n", 4381 SPP_ARGS(ifp), 4382 sppp_state_name(sp->state[IDX_PAP]), 4383 sp->rst_counter[IDX_PAP]); 4384 4385 if (--sp->rst_counter[IDX_PAP] < 0) 4386 /* TO- event */ 4387 switch (sp->state[IDX_PAP]) { 4388 case STATE_REQ_SENT: 4389 pap.tld(sp); 4390 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4391 break; 4392 } 4393 else 4394 /* TO+ event, not very much we could do */ 4395 switch (sp->state[IDX_PAP]) { 4396 case STATE_REQ_SENT: 4397 /* sppp_cp_change_state() will restart the timer */ 4398 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4399 break; 4400 } 4401 4402 splx(s); 4403 } 4404 4405 /* 4406 * That's the timeout handler if we are peer. Since the peer is active, 4407 * we need to retransmit our PAP request since it is apparently lost. 4408 * XXX We should impose a max counter. 4409 */ 4410 static void 4411 sppp_pap_my_TO(void *cookie) 4412 { 4413 struct sppp *sp = (struct sppp *)cookie; 4414 STDDCL; 4415 4416 if (debug) 4417 log(LOG_DEBUG, SPP_FMT "pap peer TO\n", 4418 SPP_ARGS(ifp)); 4419 4420 pap.scr(sp); 4421 } 4422 4423 static void 4424 sppp_pap_tlu(struct sppp *sp) 4425 { 4426 STDDCL; 4427 int x; 4428 4429 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4430 4431 if (debug) 4432 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 4433 SPP_ARGS(ifp), pap.name); 4434 4435 x = splnet(); 4436 sp->pp_auth_failures = 0; 4437 /* indicate to LCP that we need to be closed down */ 4438 sp->lcp.protos |= (1 << IDX_PAP); 4439 4440 if (sp->pp_flags & PP_NEEDAUTH) { 4441 /* 4442 * Remote is authenticator, but his auth proto didn't 4443 * complete yet. Defer the transition to network 4444 * phase. 4445 */ 4446 splx(x); 4447 return; 4448 } 4449 splx(x); 4450 sppp_phase_network(sp); 4451 } 4452 4453 static void 4454 sppp_pap_tld(struct sppp *sp) 4455 { 4456 STDDCL; 4457 4458 if (debug) 4459 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp)); 4460 callout_stop(&sp->ch[IDX_PAP]); 4461 callout_stop(&sp->pap_my_to_ch); 4462 sp->lcp.protos &= ~(1 << IDX_PAP); 4463 4464 lcp.Close(sp); 4465 } 4466 4467 static void 4468 sppp_pap_scr(struct sppp *sp) 4469 { 4470 u_char idlen, pwdlen; 4471 4472 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4473 /* can't do anything usefull */ 4474 printf(SPP_FMT "pap starting without my name and secret being set\n", 4475 SPP_ARGS(&sp->pp_if)); 4476 return; 4477 } 4478 4479 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4480 pwdlen = strlen(sp->myauth.secret); 4481 idlen = strlen(sp->myauth.name); 4482 4483 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 4484 sizeof idlen, (const char *)&idlen, 4485 idlen, sp->myauth.name, 4486 sizeof pwdlen, (const char *)&pwdlen, 4487 pwdlen, sp->myauth.secret, 4488 0); 4489 } 4490 4491 /* 4492 * Random miscellaneous functions. 4493 */ 4494 4495 /* 4496 * Send a PAP or CHAP proto packet. 4497 * 4498 * Varadic function, each of the elements for the ellipsis is of type 4499 * ``size_t mlen, const u_char *msg''. Processing will stop iff 4500 * mlen == 0. 4501 * NOTE: never declare variadic functions with types subject to type 4502 * promotion (i.e. u_char). This is asking for big trouble depending 4503 * on the architecture you are on... 4504 */ 4505 4506 static void 4507 sppp_auth_send(const struct cp *cp, struct sppp *sp, 4508 unsigned int type, unsigned int id, 4509 ...) 4510 { 4511 STDDCL; 4512 struct lcp_header *lh; 4513 struct mbuf *m; 4514 u_char *p; 4515 int len; 4516 size_t pkthdrlen; 4517 unsigned int mlen; 4518 const char *msg; 4519 va_list ap; 4520 4521 MGETHDR (m, M_DONTWAIT, MT_DATA); 4522 if (! m) 4523 return; 4524 m->m_pkthdr.rcvif = 0; 4525 4526 if (sp->pp_flags & PP_NOFRAMING) { 4527 *mtod(m, u_int16_t*) = htons(cp->proto); 4528 pkthdrlen = 2; 4529 lh = (struct lcp_header*)(mtod(m, u_int8_t*)+2); 4530 } else { 4531 struct ppp_header *h; 4532 h = mtod (m, struct ppp_header*); 4533 h->address = PPP_ALLSTATIONS; /* broadcast address */ 4534 h->control = PPP_UI; /* Unnumbered Info */ 4535 h->protocol = htons(cp->proto); 4536 pkthdrlen = PPP_HEADER_LEN; 4537 4538 lh = (struct lcp_header*)(h + 1); 4539 } 4540 4541 lh->type = type; 4542 lh->ident = id; 4543 p = (u_char*) (lh+1); 4544 4545 va_start(ap, id); 4546 len = 0; 4547 4548 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 4549 msg = va_arg(ap, const char *); 4550 len += mlen; 4551 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 4552 va_end(ap); 4553 m_freem(m); 4554 return; 4555 } 4556 4557 bcopy(msg, p, mlen); 4558 p += mlen; 4559 } 4560 va_end(ap); 4561 4562 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 4563 lh->len = htons (LCP_HEADER_LEN + len); 4564 4565 if (debug) { 4566 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 4567 SPP_ARGS(ifp), cp->name, 4568 sppp_auth_type_name(cp->proto, lh->type), 4569 lh->ident, ntohs(lh->len)); 4570 if (len) 4571 sppp_print_bytes((u_char*) (lh+1), len); 4572 addlog(">\n"); 4573 } 4574 if (IF_QFULL (&sp->pp_cpq)) { 4575 IF_DROP (&sp->pp_fastq); 4576 IF_DROP (&ifp->if_snd); 4577 m_freem (m); 4578 ++ifp->if_oerrors; 4579 } else 4580 IF_ENQUEUE (&sp->pp_cpq, m); 4581 if (! (ifp->if_flags & IFF_OACTIVE)) 4582 (*ifp->if_start) (ifp); 4583 ifp->if_obytes += m->m_pkthdr.len + 3; 4584 } 4585 4586 /* 4587 * Send keepalive packets, every 10 seconds. 4588 */ 4589 static void 4590 sppp_keepalive(void *dummy) 4591 { 4592 struct sppp *sp; 4593 int s; 4594 time_t now; 4595 4596 s = splnet(); 4597 now = time.tv_sec; 4598 for (sp=spppq; sp; sp=sp->pp_next) { 4599 struct ifnet *ifp = &sp->pp_if; 4600 4601 /* check idle timeout */ 4602 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 4603 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 4604 /* idle timeout is enabled for this interface */ 4605 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 4606 if (ifp->if_flags & IFF_DEBUG) 4607 printf("%s: no activitiy for %lu seconds\n", 4608 sp->pp_if.if_xname, 4609 (unsigned long)(now-sp->pp_last_activity)); 4610 lcp.Close(sp); 4611 continue; 4612 } 4613 } 4614 4615 /* Keepalive mode disabled or channel down? */ 4616 if (! (sp->pp_flags & PP_KEEPALIVE) || 4617 ! (ifp->if_flags & IFF_RUNNING)) 4618 continue; 4619 4620 /* No keepalive in PPP mode if LCP not opened yet. */ 4621 if (! (sp->pp_flags & PP_CISCO) && 4622 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) 4623 continue; 4624 4625 if (sp->pp_alivecnt == MAXALIVECNT) { 4626 /* No keepalive packets got. Stop the interface. */ 4627 if_down (ifp); 4628 IF_PURGE (&sp->pp_cpq); 4629 if (! (sp->pp_flags & PP_CISCO)) { 4630 printf("%s: LCP keepalive timed out, going to restart the connection\n", 4631 ifp->if_xname); 4632 sp->pp_alivecnt = 0; 4633 4634 /* we are down, close all open protocols */ 4635 lcp.Close(sp); 4636 4637 /* And now prepare LCP to reestablish the link, if configured to do so. */ 4638 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 4639 4640 /* Close connection imediatly, completition of this 4641 * will summon the magic needed to reestablish it. */ 4642 sp->pp_tlf(sp); 4643 continue; 4644 } 4645 } 4646 if (sp->pp_alivecnt <= MAXALIVECNT) 4647 ++sp->pp_alivecnt; 4648 if (sp->pp_flags & PP_CISCO) 4649 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ, 4650 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 4651 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 4652 int32_t nmagic = htonl (sp->lcp.magic); 4653 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 4654 sppp_cp_send (sp, PPP_LCP, ECHO_REQ, 4655 sp->lcp.echoid, 4, &nmagic); 4656 } 4657 } 4658 splx(s); 4659 callout_reset(&keepalive_ch, hz * 10, sppp_keepalive, NULL); 4660 } 4661 4662 /* 4663 * Get both IP addresses. 4664 */ 4665 static void 4666 sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, u_int32_t *srcmask) 4667 { 4668 struct ifnet *ifp = &sp->pp_if; 4669 struct ifaddr *ifa; 4670 struct sockaddr_in *si, *sm; 4671 u_int32_t ssrc, ddst; 4672 4673 sm = NULL; 4674 ssrc = ddst = 0; 4675 /* 4676 * Pick the first AF_INET address from the list, 4677 * aliases don't make any sense on a p2p link anyway. 4678 */ 4679 si = 0; 4680 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 4681 if (ifa->ifa_addr->sa_family == AF_INET) { 4682 si = (struct sockaddr_in *)ifa->ifa_addr; 4683 sm = (struct sockaddr_in *)ifa->ifa_netmask; 4684 if (si) 4685 break; 4686 } 4687 } 4688 if (ifa) { 4689 if (si && si->sin_addr.s_addr) { 4690 ssrc = si->sin_addr.s_addr; 4691 if (srcmask) 4692 *srcmask = ntohl(sm->sin_addr.s_addr); 4693 } 4694 4695 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 4696 if (si && si->sin_addr.s_addr) 4697 ddst = si->sin_addr.s_addr; 4698 } 4699 4700 if (dst) *dst = ntohl(ddst); 4701 if (src) *src = ntohl(ssrc); 4702 } 4703 4704 /* 4705 * Set IP addresses. Must be called at splnet. 4706 * If an address is 0, leave it the way it is. 4707 */ 4708 static void 4709 sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr) 4710 { 4711 STDDCL; 4712 struct ifaddr *ifa; 4713 struct sockaddr_in *si; 4714 struct sockaddr_in *dest; 4715 4716 /* 4717 * Pick the first AF_INET address from the list, 4718 * aliases don't make any sense on a p2p link anyway. 4719 */ 4720 4721 si = 0; 4722 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4723 { 4724 if (ifa->ifa_addr->sa_family == AF_INET) 4725 { 4726 si = (struct sockaddr_in *)ifa->ifa_addr; 4727 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4728 if (si) 4729 break; 4730 } 4731 } 4732 4733 if (ifa && si) 4734 { 4735 int error; 4736 struct sockaddr_in new_sin = *si; 4737 struct sockaddr_in new_dst = *dest; 4738 4739 /* 4740 * Scrub old routes now instead of calling in_ifinit with 4741 * scrub=1, because we may change the dstaddr 4742 * before the call to in_ifinit. 4743 */ 4744 in_ifscrub(ifp, ifatoia(ifa)); 4745 4746 if (myaddr != 0) 4747 new_sin.sin_addr.s_addr = htonl(myaddr); 4748 if (hisaddr != 0) { 4749 new_dst.sin_addr.s_addr = htonl(hisaddr); 4750 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) { 4751 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 4752 *dest = new_dst; /* fix dstaddr in place */ 4753 } 4754 } 4755 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4756 if(debug && error) 4757 { 4758 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addrs: in_ifinit " 4759 " failed, error=%d\n", SPP_ARGS(ifp), error); 4760 } 4761 } 4762 } 4763 4764 /* 4765 * Clear IP addresses. Must be called at splnet. 4766 */ 4767 static void 4768 sppp_clear_ip_addrs(struct sppp *sp) 4769 { 4770 struct ifnet *ifp = &sp->pp_if; 4771 struct ifaddr *ifa; 4772 struct sockaddr_in *si; 4773 struct sockaddr_in *dest; 4774 4775 u_int32_t remote; 4776 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4777 remote = sp->ipcp.saved_hisaddr; 4778 else 4779 sppp_get_ip_addrs(sp, 0, &remote, 0); 4780 4781 /* 4782 * Pick the first AF_INET address from the list, 4783 * aliases don't make any sense on a p2p link anyway. 4784 */ 4785 4786 si = 0; 4787 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4788 { 4789 if (ifa->ifa_addr->sa_family == AF_INET) 4790 { 4791 si = (struct sockaddr_in *)ifa->ifa_addr; 4792 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4793 if (si) 4794 break; 4795 } 4796 } 4797 4798 if (ifa && si) 4799 { 4800 struct sockaddr_in new_sin = *si; 4801 4802 in_ifscrub(ifp, ifatoia(ifa)); 4803 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 4804 new_sin.sin_addr.s_addr = 0; 4805 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4806 /* replace peer addr in place */ 4807 dest->sin_addr.s_addr = sp->ipcp.saved_hisaddr; 4808 in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4809 } 4810 } 4811 4812 #ifdef INET6 4813 /* 4814 * Get both IPv6 addresses. 4815 */ 4816 static void 4817 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 4818 struct in6_addr *srcmask) 4819 { 4820 struct ifnet *ifp = &sp->pp_if; 4821 struct ifaddr *ifa; 4822 struct sockaddr_in6 *si, *sm; 4823 struct in6_addr ssrc, ddst; 4824 4825 sm = NULL; 4826 memset(&ssrc, 0, sizeof(ssrc)); 4827 memset(&ddst, 0, sizeof(ddst)); 4828 /* 4829 * Pick the first link-local AF_INET6 address from the list, 4830 * aliases don't make any sense on a p2p link anyway. 4831 */ 4832 si = 0; 4833 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4834 if (ifa->ifa_addr->sa_family == AF_INET6) { 4835 si = (struct sockaddr_in6 *)ifa->ifa_addr; 4836 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 4837 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) 4838 break; 4839 } 4840 if (ifa) { 4841 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 4842 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc)); 4843 if (srcmask) { 4844 bcopy(&sm->sin6_addr, srcmask, 4845 sizeof(*srcmask)); 4846 } 4847 } 4848 4849 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 4850 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 4851 bcopy(&si->sin6_addr, &ddst, sizeof(ddst)); 4852 } 4853 4854 if (dst) 4855 bcopy(&ddst, dst, sizeof(*dst)); 4856 if (src) 4857 bcopy(&ssrc, src, sizeof(*src)); 4858 } 4859 4860 #ifdef IPV6CP_MYIFID_DYN 4861 /* 4862 * Generate random ifid. 4863 */ 4864 static void 4865 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 4866 { 4867 /* TBD */ 4868 } 4869 4870 /* 4871 * Set my IPv6 address. Must be called at splnet. 4872 */ 4873 static void 4874 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 4875 { 4876 STDDCL; 4877 struct ifaddr *ifa; 4878 struct sockaddr_in6 *sin6; 4879 4880 /* 4881 * Pick the first link-local AF_INET6 address from the list, 4882 * aliases don't make any sense on a p2p link anyway. 4883 */ 4884 4885 sin6 = NULL; 4886 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4887 { 4888 if (ifa->ifa_addr->sa_family == AF_INET6) 4889 { 4890 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 4891 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 4892 break; 4893 } 4894 } 4895 4896 if (ifa && sin6) 4897 { 4898 int error; 4899 struct sockaddr_in6 new_sin6 = *sin6; 4900 4901 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr)); 4902 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 4903 if (debug && error) 4904 { 4905 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit " 4906 " failed, error=%d\n", SPP_ARGS(ifp), error); 4907 } 4908 } 4909 } 4910 #endif 4911 4912 /* 4913 * Suggest a candidate address to be used by peer. 4914 */ 4915 static void 4916 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 4917 { 4918 struct in6_addr myaddr; 4919 struct timeval tv; 4920 4921 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4922 4923 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 4924 microtime(&tv); 4925 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 4926 myaddr.s6_addr[14] ^= 0xff; 4927 myaddr.s6_addr[15] ^= 0xff; 4928 } else { 4929 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 4930 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 4931 } 4932 if (suggest) 4933 bcopy(&myaddr, suggest, sizeof(myaddr)); 4934 } 4935 #endif /*INET6*/ 4936 4937 /* 4938 * Process ioctl requests specific to the PPP interface. 4939 * Permissions have already been checked. 4940 */ 4941 static int 4942 sppp_params(struct sppp *sp, int cmd, void *data) 4943 { 4944 switch (cmd) { 4945 case SPPPGETAUTHCFG: 4946 { 4947 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 4948 int error; 4949 size_t len; 4950 4951 cfg->myauthflags = sp->myauth.flags; 4952 cfg->hisauthflags = sp->hisauth.flags; 4953 strncpy(cfg->ifname, sp->pp_if.if_xname, IFNAMSIZ); 4954 cfg->hisauth = 0; 4955 if (sp->hisauth.proto) 4956 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4957 cfg->myauth = 0; 4958 if (sp->myauth.proto) 4959 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4960 if (cfg->myname_length == 0) { 4961 if (sp->myauth.name != NULL) 4962 cfg->myname_length = strlen(sp->myauth.name)+1; 4963 } else { 4964 if (sp->myauth.name == NULL) { 4965 cfg->myname_length = 0; 4966 } else { 4967 len = strlen(sp->myauth.name)+1; 4968 if (cfg->myname_length < len) 4969 return (ENAMETOOLONG); 4970 error = copyout(sp->myauth.name, cfg->myname, len); 4971 if (error) return error; 4972 } 4973 } 4974 if (cfg->hisname_length == 0) { 4975 if(sp->hisauth.name != NULL) 4976 cfg->hisname_length = strlen(sp->hisauth.name)+1; 4977 } else { 4978 if (sp->hisauth.name == NULL) { 4979 cfg->hisname_length = 0; 4980 } else { 4981 len = strlen(sp->hisauth.name)+1; 4982 if (cfg->hisname_length < len) 4983 return (ENAMETOOLONG); 4984 error = copyout(sp->hisauth.name, cfg->hisname, len); 4985 if (error) return error; 4986 } 4987 } 4988 } 4989 break; 4990 case SPPPSETAUTHCFG: 4991 { 4992 struct spppauthcfg *cfg = (struct spppauthcfg*)data; 4993 int error; 4994 4995 if (sp->myauth.name) { 4996 free(sp->myauth.name, M_DEVBUF); 4997 sp->myauth.name = NULL; 4998 } 4999 if (sp->myauth.secret) { 5000 free(sp->myauth.secret, M_DEVBUF); 5001 sp->myauth.secret = NULL; 5002 } 5003 if (sp->hisauth.name) { 5004 free(sp->hisauth.name, M_DEVBUF); 5005 sp->hisauth.name = NULL; 5006 } 5007 if (sp->hisauth.secret) { 5008 free(sp->hisauth.secret, M_DEVBUF); 5009 sp->hisauth.secret = NULL; 5010 } 5011 5012 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5013 if (cfg->hisname_length >= MCLBYTES) 5014 return (ENAMETOOLONG); 5015 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5016 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5017 if (error) { 5018 free(sp->hisauth.name, M_DEVBUF); 5019 sp->hisauth.name = NULL; 5020 return error; 5021 } 5022 sp->hisauth.name[cfg->hisname_length-1] = 0; 5023 } 5024 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5025 if (cfg->hissecret_length >= MCLBYTES) 5026 return (ENAMETOOLONG); 5027 sp->hisauth.secret = malloc(cfg->hissecret_length, M_DEVBUF, M_WAITOK); 5028 error = copyin(cfg->hissecret, sp->hisauth.secret, cfg->hissecret_length); 5029 if (error) { 5030 free(sp->hisauth.secret, M_DEVBUF); 5031 sp->hisauth.secret = NULL; 5032 return error; 5033 } 5034 sp->hisauth.secret[cfg->hissecret_length-1] = 0; 5035 } 5036 if (cfg->myname != NULL && cfg->myname_length > 0) { 5037 if (cfg->myname_length >= MCLBYTES) 5038 return (ENAMETOOLONG); 5039 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5040 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5041 if (error) { 5042 free(sp->myauth.name, M_DEVBUF); 5043 sp->myauth.name = NULL; 5044 return error; 5045 } 5046 sp->myauth.name[cfg->myname_length-1] = 0; 5047 } 5048 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5049 if (cfg->mysecret_length >= MCLBYTES) 5050 return (ENAMETOOLONG); 5051 sp->myauth.secret = malloc(cfg->mysecret_length, M_DEVBUF, M_WAITOK); 5052 error = copyin(cfg->mysecret, sp->myauth.secret, cfg->mysecret_length); 5053 if (error) { 5054 free(sp->myauth.secret, M_DEVBUF); 5055 sp->myauth.secret = NULL; 5056 return error; 5057 } 5058 sp->myauth.secret[cfg->mysecret_length-1] = 0; 5059 } 5060 sp->myauth.flags = cfg->myauthflags; 5061 if (cfg->myauth) 5062 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5063 sp->hisauth.flags = cfg->hisauthflags; 5064 if (cfg->hisauth) 5065 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5066 sp->pp_auth_failures = 0; 5067 } 5068 break; 5069 case SPPPGETLCPCFG: 5070 { 5071 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5072 lcp->lcp_timeout = sp->lcp.timeout; 5073 } 5074 break; 5075 case SPPPSETLCPCFG: 5076 { 5077 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5078 sp->lcp.timeout = lcp->lcp_timeout; 5079 } 5080 break; 5081 case SPPPGETSTATUS: 5082 { 5083 struct spppstatus *status = (struct spppstatus *)data; 5084 status->phase = sp->pp_phase; 5085 } 5086 break; 5087 case SPPPGETIDLETO: 5088 { 5089 struct spppidletimeout *to = (struct spppidletimeout *)data; 5090 to->idle_seconds = sp->pp_idle_timeout; 5091 } 5092 break; 5093 case SPPPSETIDLETO: 5094 { 5095 struct spppidletimeout *to = (struct spppidletimeout *)data; 5096 sp->pp_idle_timeout = to->idle_seconds; 5097 } 5098 break; 5099 case SPPPSETAUTHFAILURE: 5100 { 5101 struct spppauthfailuresettings *afsettings = (struct spppauthfailuresettings *)data; 5102 sp->pp_max_auth_fail = afsettings->max_failures; 5103 sp->pp_auth_failures = 0; 5104 } 5105 break; 5106 case SPPPGETAUTHFAILURES: 5107 { 5108 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5109 stats->auth_failures = sp->pp_auth_failures; 5110 stats->max_failures = sp->pp_max_auth_fail; 5111 } 5112 break; 5113 case SPPPSETDNSOPTS: 5114 { 5115 struct spppdnssettings *req = (struct spppdnssettings*)data; 5116 sp->query_dns = req->query_dns & 3; 5117 } 5118 break; 5119 case SPPPGETDNSOPTS: 5120 { 5121 struct spppdnssettings *req = (struct spppdnssettings*)data; 5122 req->query_dns = sp->query_dns; 5123 } 5124 break; 5125 case SPPPGETDNSADDRS: 5126 { 5127 struct spppdnsaddrs *addrs = (struct spppdnsaddrs*)data; 5128 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5129 } 5130 break; 5131 default: 5132 return (EINVAL); 5133 } 5134 5135 return (0); 5136 } 5137 5138 static void 5139 sppp_phase_network(struct sppp *sp) 5140 { 5141 STDDCL; 5142 int i; 5143 u_int32_t mask; 5144 5145 sp->pp_phase = SPPP_PHASE_NETWORK; 5146 5147 if(debug) 5148 { 5149 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 5150 sppp_phase_name(sp->pp_phase)); 5151 } 5152 5153 /* Notify NCPs now. */ 5154 for (i = 0; i < IDX_COUNT; i++) 5155 if ((cps[i])->flags & CP_NCP) 5156 (cps[i])->Open(sp); 5157 5158 /* Send Up events to all NCPs. */ 5159 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5160 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) 5161 (cps[i])->Up(sp); 5162 5163 /* if no NCP is starting, all this was in vain, close down */ 5164 sppp_lcp_check_and_close(sp); 5165 } 5166 5167 5168 static const char * 5169 sppp_cp_type_name(u_char type) 5170 { 5171 static char buf[12]; 5172 switch (type) { 5173 case CONF_REQ: return "conf-req"; 5174 case CONF_ACK: return "conf-ack"; 5175 case CONF_NAK: return "conf-nak"; 5176 case CONF_REJ: return "conf-rej"; 5177 case TERM_REQ: return "term-req"; 5178 case TERM_ACK: return "term-ack"; 5179 case CODE_REJ: return "code-rej"; 5180 case PROTO_REJ: return "proto-rej"; 5181 case ECHO_REQ: return "echo-req"; 5182 case ECHO_REPLY: return "echo-reply"; 5183 case DISC_REQ: return "discard-req"; 5184 } 5185 sprintf (buf, "0x%x", type); 5186 return buf; 5187 } 5188 5189 static const char * 5190 sppp_auth_type_name(u_short proto, u_char type) 5191 { 5192 static char buf[12]; 5193 switch (proto) { 5194 case PPP_CHAP: 5195 switch (type) { 5196 case CHAP_CHALLENGE: return "challenge"; 5197 case CHAP_RESPONSE: return "response"; 5198 case CHAP_SUCCESS: return "success"; 5199 case CHAP_FAILURE: return "failure"; 5200 } 5201 case PPP_PAP: 5202 switch (type) { 5203 case PAP_REQ: return "req"; 5204 case PAP_ACK: return "ack"; 5205 case PAP_NAK: return "nak"; 5206 } 5207 } 5208 sprintf (buf, "0x%x", type); 5209 return buf; 5210 } 5211 5212 static const char * 5213 sppp_lcp_opt_name(u_char opt) 5214 { 5215 static char buf[12]; 5216 switch (opt) { 5217 case LCP_OPT_MRU: return "mru"; 5218 case LCP_OPT_ASYNC_MAP: return "async-map"; 5219 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 5220 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 5221 case LCP_OPT_MAGIC: return "magic"; 5222 case LCP_OPT_PROTO_COMP: return "proto-comp"; 5223 case LCP_OPT_ADDR_COMP: return "addr-comp"; 5224 } 5225 sprintf (buf, "0x%x", opt); 5226 return buf; 5227 } 5228 5229 static const char * 5230 sppp_ipcp_opt_name(u_char opt) 5231 { 5232 static char buf[12]; 5233 switch (opt) { 5234 case IPCP_OPT_ADDRESSES: return "addresses"; 5235 case IPCP_OPT_COMPRESSION: return "compression"; 5236 case IPCP_OPT_ADDRESS: return "address"; 5237 } 5238 sprintf (buf, "0x%x", opt); 5239 return buf; 5240 } 5241 5242 #ifdef INET6 5243 static const char * 5244 sppp_ipv6cp_opt_name(u_char opt) 5245 { 5246 static char buf[12]; 5247 switch (opt) { 5248 case IPV6CP_OPT_IFID: return "ifid"; 5249 case IPV6CP_OPT_COMPRESSION: return "compression"; 5250 } 5251 sprintf (buf, "0x%x", opt); 5252 return buf; 5253 } 5254 #endif 5255 5256 static const char * 5257 sppp_state_name(int state) 5258 { 5259 switch (state) { 5260 case STATE_INITIAL: return "initial"; 5261 case STATE_STARTING: return "starting"; 5262 case STATE_CLOSED: return "closed"; 5263 case STATE_STOPPED: return "stopped"; 5264 case STATE_CLOSING: return "closing"; 5265 case STATE_STOPPING: return "stopping"; 5266 case STATE_REQ_SENT: return "req-sent"; 5267 case STATE_ACK_RCVD: return "ack-rcvd"; 5268 case STATE_ACK_SENT: return "ack-sent"; 5269 case STATE_OPENED: return "opened"; 5270 } 5271 return "illegal"; 5272 } 5273 5274 static const char * 5275 sppp_phase_name(int phase) 5276 { 5277 switch (phase) { 5278 case SPPP_PHASE_DEAD: return "dead"; 5279 case SPPP_PHASE_ESTABLISH: return "establish"; 5280 case SPPP_PHASE_TERMINATE: return "terminate"; 5281 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 5282 case SPPP_PHASE_NETWORK: return "network"; 5283 } 5284 return "illegal"; 5285 } 5286 5287 static const char * 5288 sppp_proto_name(u_short proto) 5289 { 5290 static char buf[12]; 5291 switch (proto) { 5292 case PPP_LCP: return "lcp"; 5293 case PPP_IPCP: return "ipcp"; 5294 case PPP_PAP: return "pap"; 5295 case PPP_CHAP: return "chap"; 5296 case PPP_IPV6CP: return "ipv6cp"; 5297 } 5298 sprintf(buf, "0x%x", (unsigned)proto); 5299 return buf; 5300 } 5301 5302 static void 5303 sppp_print_bytes(const u_char *p, u_short len) 5304 { 5305 addlog(" %02x", *p++); 5306 while (--len > 0) 5307 addlog("-%02x", *p++); 5308 } 5309 5310 static void 5311 sppp_print_string(const char *p, u_short len) 5312 { 5313 u_char c; 5314 5315 while (len-- > 0) { 5316 c = *p++; 5317 /* 5318 * Print only ASCII chars directly. RFC 1994 recommends 5319 * using only them, but we don't rely on it. */ 5320 if (c < ' ' || c > '~') 5321 addlog("\\x%x", c); 5322 else 5323 addlog("%c", c); 5324 } 5325 } 5326 5327 static const char * 5328 sppp_dotted_quad(u_int32_t addr) 5329 { 5330 static char s[16]; 5331 sprintf(s, "%d.%d.%d.%d", 5332 (int)((addr >> 24) & 0xff), 5333 (int)((addr >> 16) & 0xff), 5334 (int)((addr >> 8) & 0xff), 5335 (int)(addr & 0xff)); 5336 return s; 5337 } 5338 5339 /* a dummy, used to drop uninteresting events */ 5340 static void 5341 sppp_null(struct sppp *unused) 5342 { 5343 /* do just nothing */ 5344 } 5345 /* 5346 * This file is large. Tell emacs to highlight it nevertheless. 5347 * 5348 * Local Variables: 5349 * hilit-auto-highlight-maxout: 120000 5350 * End: 5351 */ 5352
Indexes created Fri Sep 26 20:09:58 GMT 2025