if_spppsubr.c revision 1.20.2.12
1 /* $NetBSD: if_spppsubr.c,v 1.20.2.12 2002/06/24 22:11:36 nathanw 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 1.20.2.12 2002/06/24 22:11:36 nathanw 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/lwp.h> 40 #include <sys/proc.h> 41 #include <sys/systm.h> 42 #include <sys/kernel.h> 43 #include <sys/sockio.h> 44 #include <sys/socket.h> 45 #include <sys/syslog.h> 46 #include <sys/malloc.h> 47 #include <sys/mbuf.h> 48 #include <sys/callout.h> 49 #include <sys/md5.h> 50 51 #include <net/if.h> 52 #include <net/netisr.h> 53 #include <net/if_types.h> 54 #include <net/route.h> 55 #include <net/ppp_defs.h> 56 57 #include <machine/stdarg.h> 58 59 #include <netinet/in.h> 60 #include <netinet/in_systm.h> 61 #include <netinet/in_var.h> 62 #ifdef INET 63 #include <netinet/ip.h> 64 #include <netinet/tcp.h> 65 #endif 66 #include <net/ethertypes.h> 67 68 #ifdef IPX 69 #include <netipx/ipx.h> 70 #include <netipx/ipx_if.h> 71 #endif 72 73 #ifdef NS 74 #include <netns/ns.h> 75 #include <netns/ns_if.h> 76 #endif 77 78 #ifdef ISO 79 #include <netiso/argo_debug.h> 80 #include <netiso/iso.h> 81 #include <netiso/iso_var.h> 82 #include <netiso/iso_snpac.h> 83 #endif 84 85 #include <net/if_sppp.h> 86 #include <net/if_spppvar.h> 87 88 #define MAXALIVECNT 3 /* max. alive packets */ 89 #define DEFAULT_MAX_AUTH_FAILURES 5 /* max. auth. failures */ 90 91 /* 92 * Interface flags that can be set in an ifconfig command. 93 * 94 * Setting link0 will make the link passive, i.e. it will be marked 95 * as being administrative openable, but won't be opened to begin 96 * with. Incoming calls will be answered, or subsequent calls with 97 * -link1 will cause the administrative open of the LCP layer. 98 * 99 * Setting link1 will cause the link to auto-dial only as packets 100 * arrive to be sent. 101 * 102 * Setting IFF_DEBUG will syslog the option negotiation and state 103 * transitions at level kern.debug. Note: all logs consistently look 104 * like 105 * 106 * <if-name><unit>: <proto-name> <additional info...> 107 * 108 * with <if-name><unit> being something like "bppp0", and <proto-name> 109 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc. 110 */ 111 112 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ 113 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */ 114 115 #define CONF_REQ 1 /* PPP configure request */ 116 #define CONF_ACK 2 /* PPP configure acknowledge */ 117 #define CONF_NAK 3 /* PPP configure negative ack */ 118 #define CONF_REJ 4 /* PPP configure reject */ 119 #define TERM_REQ 5 /* PPP terminate request */ 120 #define TERM_ACK 6 /* PPP terminate acknowledge */ 121 #define CODE_REJ 7 /* PPP code reject */ 122 #define PROTO_REJ 8 /* PPP protocol reject */ 123 #define ECHO_REQ 9 /* PPP echo request */ 124 #define ECHO_REPLY 10 /* PPP echo reply */ 125 #define DISC_REQ 11 /* PPP discard request */ 126 127 #define LCP_OPT_MRU 1 /* maximum receive unit */ 128 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */ 129 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ 130 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ 131 #define LCP_OPT_MAGIC 5 /* magic number */ 132 #define LCP_OPT_RESERVED 6 /* reserved */ 133 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ 134 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ 135 136 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ 137 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol */ 138 #define IPCP_OPT_ADDRESS 3 /* local IP address */ 139 #define IPCP_OPT_PRIMDNS 129 /* primary remote dns address */ 140 #define IPCP_OPT_SECDNS 131 /* secondary remote dns address */ 141 142 #define IPV6CP_OPT_IFID 1 /* interface identifier */ 143 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ 144 145 #define PAP_REQ 1 /* PAP name/password request */ 146 #define PAP_ACK 2 /* PAP acknowledge */ 147 #define PAP_NAK 3 /* PAP fail */ 148 149 #define CHAP_CHALLENGE 1 /* CHAP challenge request */ 150 #define CHAP_RESPONSE 2 /* CHAP challenge response */ 151 #define CHAP_SUCCESS 3 /* CHAP response ok */ 152 #define CHAP_FAILURE 4 /* CHAP response failed */ 153 154 #define CHAP_MD5 5 /* hash algorithm - MD5 */ 155 156 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */ 157 #define CISCO_UNICAST 0x0f /* Cisco unicast address */ 158 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ 159 #define CISCO_ADDR_REQ 0 /* Cisco address request */ 160 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */ 161 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ 162 163 /* states are named and numbered according to RFC 1661 */ 164 #define STATE_INITIAL 0 165 #define STATE_STARTING 1 166 #define STATE_CLOSED 2 167 #define STATE_STOPPED 3 168 #define STATE_CLOSING 4 169 #define STATE_STOPPING 5 170 #define STATE_REQ_SENT 6 171 #define STATE_ACK_RCVD 7 172 #define STATE_ACK_SENT 8 173 #define STATE_OPENED 9 174 175 struct ppp_header { 176 u_char address; 177 u_char control; 178 u_short protocol; 179 } __attribute__((__packed__)); 180 #define PPP_HEADER_LEN sizeof (struct ppp_header) 181 182 struct lcp_header { 183 u_char type; 184 u_char ident; 185 u_short len; 186 } __attribute__((__packed__)); 187 #define LCP_HEADER_LEN sizeof (struct lcp_header) 188 189 struct cisco_packet { 190 u_int32_t type; 191 u_int32_t par1; 192 u_int32_t par2; 193 u_short rel; 194 u_short time0; 195 u_short time1; 196 } __attribute__((__packed__)); 197 #define CISCO_PACKET_LEN 18 198 199 /* 200 * We follow the spelling and capitalization of RFC 1661 here, to make 201 * it easier comparing with the standard. Please refer to this RFC in 202 * case you can't make sense out of these abbreviation; it will also 203 * explain the semantics related to the various events and actions. 204 */ 205 struct cp { 206 u_short proto; /* PPP control protocol number */ 207 u_char protoidx; /* index into state table in struct sppp */ 208 u_char flags; 209 #define CP_LCP 0x01 /* this is the LCP */ 210 #define CP_AUTH 0x02 /* this is an authentication protocol */ 211 #define CP_NCP 0x04 /* this is a NCP */ 212 #define CP_QUAL 0x08 /* this is a quality reporting protocol */ 213 const char *name; /* name of this control protocol */ 214 /* event handlers */ 215 void (*Up)(struct sppp *sp); 216 void (*Down)(struct sppp *sp); 217 void (*Open)(struct sppp *sp); 218 void (*Close)(struct sppp *sp); 219 void (*TO)(void *sp); 220 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len); 221 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len); 222 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len); 223 /* actions */ 224 void (*tlu)(struct sppp *sp); 225 void (*tld)(struct sppp *sp); 226 void (*tls)(struct sppp *sp); 227 void (*tlf)(struct sppp *sp); 228 void (*scr)(struct sppp *sp); 229 }; 230 231 static struct sppp *spppq; 232 static struct callout keepalive_ch; 233 234 #ifdef __FreeBSD__ 235 #define SPP_FMT "%s%d: " 236 #define SPP_ARGS(ifp) (ifp)->if_name, (ifp)->if_unit 237 #else 238 #define SPP_FMT "%s: " 239 #define SPP_ARGS(ifp) (ifp)->if_xname 240 #endif 241 242 #ifdef INET 243 /* 244 * The following disgusting hack gets around the problem that IP TOS 245 * can't be set yet. We want to put "interactive" traffic on a high 246 * priority queue. To decide if traffic is interactive, we check that 247 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 248 * 249 * XXX is this really still necessary? - joerg - 250 */ 251 static u_short interactive_ports[8] = { 252 0, 513, 0, 0, 253 0, 21, 0, 23, 254 }; 255 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 256 #endif 257 258 /* almost every function needs these */ 259 #define STDDCL \ 260 struct ifnet *ifp = &sp->pp_if; \ 261 int debug = ifp->if_flags & IFF_DEBUG 262 263 static int sppp_output(struct ifnet *ifp, struct mbuf *m, 264 struct sockaddr *dst, struct rtentry *rt); 265 266 static void sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2); 267 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m); 268 269 static void sppp_cp_input(const struct cp *cp, struct sppp *sp, 270 struct mbuf *m); 271 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 272 u_char ident, u_short len, void *data); 273 /* static void sppp_cp_timeout(void *arg); */ 274 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp, 275 int newstate); 276 static void sppp_auth_send(const struct cp *cp, 277 struct sppp *sp, unsigned int type, unsigned int id, 278 ...); 279 280 static void sppp_up_event(const struct cp *cp, struct sppp *sp); 281 static void sppp_down_event(const struct cp *cp, struct sppp *sp); 282 static void sppp_open_event(const struct cp *cp, struct sppp *sp); 283 static void sppp_close_event(const struct cp *cp, struct sppp *sp); 284 static void sppp_to_event(const struct cp *cp, struct sppp *sp); 285 286 static void sppp_null(struct sppp *sp); 287 288 static void sppp_lcp_init(struct sppp *sp); 289 static void sppp_lcp_up(struct sppp *sp); 290 static void sppp_lcp_down(struct sppp *sp); 291 static void sppp_lcp_open(struct sppp *sp); 292 static void sppp_lcp_close(struct sppp *sp); 293 static void sppp_lcp_TO(void *sp); 294 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 295 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 296 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 297 static void sppp_lcp_tlu(struct sppp *sp); 298 static void sppp_lcp_tld(struct sppp *sp); 299 static void sppp_lcp_tls(struct sppp *sp); 300 static void sppp_lcp_tlf(struct sppp *sp); 301 static void sppp_lcp_scr(struct sppp *sp); 302 static void sppp_lcp_check_and_close(struct sppp *sp); 303 static int sppp_ncp_check(struct sppp *sp); 304 305 static void sppp_ipcp_init(struct sppp *sp); 306 static void sppp_ipcp_up(struct sppp *sp); 307 static void sppp_ipcp_down(struct sppp *sp); 308 static void sppp_ipcp_open(struct sppp *sp); 309 static void sppp_ipcp_close(struct sppp *sp); 310 static void sppp_ipcp_TO(void *sp); 311 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 312 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 313 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 314 static void sppp_ipcp_tlu(struct sppp *sp); 315 static void sppp_ipcp_tld(struct sppp *sp); 316 static void sppp_ipcp_tls(struct sppp *sp); 317 static void sppp_ipcp_tlf(struct sppp *sp); 318 static void sppp_ipcp_scr(struct sppp *sp); 319 320 static void sppp_ipv6cp_init(struct sppp *sp); 321 static void sppp_ipv6cp_up(struct sppp *sp); 322 static void sppp_ipv6cp_down(struct sppp *sp); 323 static void sppp_ipv6cp_open(struct sppp *sp); 324 static void sppp_ipv6cp_close(struct sppp *sp); 325 static void sppp_ipv6cp_TO(void *sp); 326 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len); 327 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 328 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 329 static void sppp_ipv6cp_tlu(struct sppp *sp); 330 static void sppp_ipv6cp_tld(struct sppp *sp); 331 static void sppp_ipv6cp_tls(struct sppp *sp); 332 static void sppp_ipv6cp_tlf(struct sppp *sp); 333 static void sppp_ipv6cp_scr(struct sppp *sp); 334 335 static void sppp_pap_input(struct sppp *sp, struct mbuf *m); 336 static void sppp_pap_init(struct sppp *sp); 337 static void sppp_pap_open(struct sppp *sp); 338 static void sppp_pap_close(struct sppp *sp); 339 static void sppp_pap_TO(void *sp); 340 static void sppp_pap_my_TO(void *sp); 341 static void sppp_pap_tlu(struct sppp *sp); 342 static void sppp_pap_tld(struct sppp *sp); 343 static void sppp_pap_scr(struct sppp *sp); 344 345 static void sppp_chap_input(struct sppp *sp, struct mbuf *m); 346 static void sppp_chap_init(struct sppp *sp); 347 static void sppp_chap_open(struct sppp *sp); 348 static void sppp_chap_close(struct sppp *sp); 349 static void sppp_chap_TO(void *sp); 350 static void sppp_chap_tlu(struct sppp *sp); 351 static void sppp_chap_tld(struct sppp *sp); 352 static void sppp_chap_scr(struct sppp *sp); 353 354 static const char *sppp_auth_type_name(u_short proto, u_char type); 355 static const char *sppp_cp_type_name(u_char type); 356 static const char *sppp_dotted_quad(u_int32_t addr); 357 static const char *sppp_ipcp_opt_name(u_char opt); 358 #ifdef INET6 359 static const char *sppp_ipv6cp_opt_name(u_char opt); 360 #endif 361 static const char *sppp_lcp_opt_name(u_char opt); 362 static const char *sppp_phase_name(int phase); 363 static const char *sppp_proto_name(u_short proto); 364 static const char *sppp_state_name(int state); 365 static int sppp_params(struct sppp *sp, int cmd, void *data); 366 static void sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, 367 u_int32_t *srcmask); 368 static void sppp_keepalive(void *dummy); 369 static void sppp_phase_network(struct sppp *sp); 370 static void sppp_print_bytes(const u_char *p, u_short len); 371 static void sppp_print_string(const char *p, u_short len); 372 static void sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr); 373 static void sppp_clear_ip_addrs(struct sppp *sp); 374 #ifdef INET6 375 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, 376 struct in6_addr *dst, struct in6_addr *srcmask); 377 #ifdef IPV6CP_MYIFID_DYN 378 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src); 379 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src); 380 #endif 381 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src); 382 #endif 383 384 /* our control protocol descriptors */ 385 static const struct cp lcp = { 386 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 387 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close, 388 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak, 389 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf, 390 sppp_lcp_scr 391 }; 392 393 static const struct cp ipcp = { 394 PPP_IPCP, IDX_IPCP, 395 #ifdef INET 396 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 397 #else 398 0, 399 #endif 400 "ipcp", 401 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close, 402 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak, 403 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf, 404 sppp_ipcp_scr 405 }; 406 407 static const struct cp ipv6cp = { 408 PPP_IPV6CP, IDX_IPV6CP, 409 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 410 CP_NCP, 411 #else 412 0, 413 #endif 414 "ipv6cp", 415 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close, 416 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak, 417 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf, 418 sppp_ipv6cp_scr 419 }; 420 421 static const struct cp pap = { 422 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 423 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close, 424 sppp_pap_TO, 0, 0, 0, 425 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null, 426 sppp_pap_scr 427 }; 428 429 static const struct cp chap = { 430 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 431 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close, 432 sppp_chap_TO, 0, 0, 0, 433 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null, 434 sppp_chap_scr 435 }; 436 437 static const struct cp *cps[IDX_COUNT] = { 438 &lcp, /* IDX_LCP */ 439 &ipcp, /* IDX_IPCP */ 440 &ipv6cp, /* IDX_IPV6CP */ 441 &pap, /* IDX_PAP */ 442 &chap, /* IDX_CHAP */ 443 }; 444 445 446 /* 447 * Exported functions, comprising our interface to the lower layer. 448 */ 449 450 /* 451 * Process the received packet. 452 */ 453 void 454 sppp_input(struct ifnet *ifp, struct mbuf *m) 455 { 456 struct ppp_header *h = NULL; 457 struct ifqueue *inq = 0; 458 u_int16_t protocol; 459 int s; 460 struct sppp *sp = (struct sppp *)ifp; 461 int debug = ifp->if_flags & IFF_DEBUG; 462 463 if (ifp->if_flags & IFF_UP) 464 /* Count received bytes, add hardware framing */ 465 ifp->if_ibytes += m->m_pkthdr.len + sp->pp_framebytes; 466 467 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 468 /* Too small packet, drop it. */ 469 if (debug) 470 log(LOG_DEBUG, 471 SPP_FMT "input packet is too small, %d bytes\n", 472 SPP_ARGS(ifp), m->m_pkthdr.len); 473 drop: 474 ++ifp->if_ierrors; 475 ++ifp->if_iqdrops; 476 m_freem (m); 477 return; 478 } 479 480 if (sp->pp_flags & PP_NOFRAMING) { 481 memcpy(&protocol, mtod(m, void *), 2); 482 protocol = ntohs(protocol); 483 m_adj(m, 2); 484 } else { 485 486 /* Get PPP header. */ 487 h = mtod (m, struct ppp_header*); 488 m_adj (m, PPP_HEADER_LEN); 489 490 switch (h->address) { 491 case PPP_ALLSTATIONS: 492 if (h->control != PPP_UI) 493 goto invalid; 494 if (sp->pp_flags & PP_CISCO) { 495 if (debug) 496 log(LOG_DEBUG, 497 SPP_FMT "PPP packet in Cisco mode " 498 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 499 SPP_ARGS(ifp), 500 h->address, h->control, ntohs(h->protocol)); 501 goto drop; 502 } 503 break; 504 case CISCO_MULTICAST: 505 case CISCO_UNICAST: 506 /* Don't check the control field here (RFC 1547). */ 507 if (! (sp->pp_flags & PP_CISCO)) { 508 if (debug) 509 log(LOG_DEBUG, 510 SPP_FMT "Cisco packet in PPP mode " 511 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 512 SPP_ARGS(ifp), 513 h->address, h->control, ntohs(h->protocol)); 514 goto drop; 515 } 516 switch (ntohs (h->protocol)) { 517 default: 518 ++ifp->if_noproto; 519 goto invalid; 520 case CISCO_KEEPALIVE: 521 sppp_cisco_input ((struct sppp*) ifp, m); 522 m_freem (m); 523 return; 524 #ifdef INET 525 case ETHERTYPE_IP: 526 schednetisr (NETISR_IP); 527 inq = &ipintrq; 528 break; 529 #endif 530 #ifdef INET6 531 case ETHERTYPE_IPV6: 532 schednetisr (NETISR_IPV6); 533 inq = &ip6intrq; 534 break; 535 #endif 536 #ifdef IPX 537 case ETHERTYPE_IPX: 538 schednetisr (NETISR_IPX); 539 inq = &ipxintrq; 540 break; 541 #endif 542 #ifdef NS 543 case ETHERTYPE_NS: 544 schednetisr (NETISR_NS); 545 inq = &nsintrq; 546 break; 547 #endif 548 } 549 goto queue_pkt; 550 default: /* Invalid PPP packet. */ 551 invalid: 552 if (debug) 553 log(LOG_DEBUG, 554 SPP_FMT "invalid input packet " 555 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 556 SPP_ARGS(ifp), 557 h->address, h->control, ntohs(h->protocol)); 558 goto drop; 559 } 560 protocol = ntohs (h->protocol); 561 } 562 563 switch (protocol) { 564 default: 565 if (sp->state[IDX_LCP] == STATE_OPENED) { 566 u_int16_t prot = htons(protocol); 567 sppp_cp_send (sp, PPP_LCP, PROTO_REJ, 568 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2, 569 &prot); 570 } 571 if (debug) 572 log(LOG_DEBUG, 573 SPP_FMT "invalid input protocol " 574 "<proto=0x%x>\n", SPP_ARGS(ifp), ntohs(protocol)); 575 ++ifp->if_noproto; 576 goto drop; 577 case PPP_LCP: 578 sppp_cp_input(&lcp, sp, m); 579 m_freem (m); 580 return; 581 case PPP_PAP: 582 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 583 sppp_pap_input(sp, m); 584 m_freem (m); 585 return; 586 case PPP_CHAP: 587 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 588 sppp_chap_input(sp, m); 589 m_freem (m); 590 return; 591 #ifdef INET 592 case PPP_IPCP: 593 if (sp->pp_phase == SPPP_PHASE_NETWORK) 594 sppp_cp_input(&ipcp, sp, m); 595 m_freem (m); 596 return; 597 case PPP_IP: 598 if (sp->state[IDX_IPCP] == STATE_OPENED) { 599 schednetisr (NETISR_IP); 600 inq = &ipintrq; 601 sp->pp_last_activity = time.tv_sec; 602 } 603 break; 604 #endif 605 #ifdef INET6 606 case PPP_IPV6CP: 607 if (sp->pp_phase == SPPP_PHASE_NETWORK) 608 sppp_cp_input(&ipv6cp, sp, m); 609 m_freem (m); 610 return; 611 612 case PPP_IPV6: 613 if (sp->state[IDX_IPV6CP] == STATE_OPENED) { 614 schednetisr (NETISR_IPV6); 615 inq = &ip6intrq; 616 sp->pp_last_activity = time.tv_sec; 617 } 618 break; 619 #endif 620 #ifdef IPX 621 case PPP_IPX: 622 /* IPX IPXCP not implemented yet */ 623 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 624 schednetisr (NETISR_IPX); 625 inq = &ipxintrq; 626 } 627 break; 628 #endif 629 #ifdef NS 630 case PPP_XNS: 631 /* XNS IDPCP not implemented yet */ 632 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 633 schednetisr (NETISR_NS); 634 inq = &nsintrq; 635 } 636 break; 637 #endif 638 #ifdef ISO 639 case PPP_ISO: 640 /* OSI NLCP not implemented yet */ 641 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 642 schednetisr (NETISR_ISO); 643 inq = &clnlintrq; 644 } 645 break; 646 #endif 647 } 648 649 queue_pkt: 650 if (! (ifp->if_flags & IFF_UP) || ! inq) 651 goto drop; 652 653 /* Check queue. */ 654 s = splnet(); 655 if (IF_QFULL (inq)) { 656 /* Queue overflow. */ 657 IF_DROP(inq); 658 splx(s); 659 if (debug) 660 log(LOG_DEBUG, SPP_FMT "protocol queue overflow\n", 661 SPP_ARGS(ifp)); 662 goto drop; 663 } 664 IF_ENQUEUE(inq, m); 665 splx(s); 666 } 667 668 /* 669 * Enqueue transmit packet. 670 */ 671 static int 672 sppp_output(struct ifnet *ifp, struct mbuf *m, 673 struct sockaddr *dst, struct rtentry *rt) 674 { 675 struct sppp *sp = (struct sppp*) ifp; 676 struct ppp_header *h = NULL; 677 struct ifqueue *ifq = NULL; /* XXX */ 678 int s, len, rv = 0; 679 u_int16_t protocol; 680 ALTQ_DECL(struct altq_pktattr pktattr;) 681 682 s = splnet(); 683 684 sp->pp_last_activity = time.tv_sec; 685 686 if ((ifp->if_flags & IFF_UP) == 0 || 687 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 688 m_freem (m); 689 splx (s); 690 return (ENETDOWN); 691 } 692 693 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 694 /* 695 * Interface is not yet running, but auto-dial. Need 696 * to start LCP for it. 697 */ 698 ifp->if_flags |= IFF_RUNNING; 699 splx(s); 700 lcp.Open(sp); 701 s = splnet(); 702 } 703 704 /* 705 * If the queueing discipline needs packet classification, 706 * do it before prepending link headers. 707 */ 708 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family, &pktattr); 709 710 #ifdef INET 711 if (dst->sa_family == AF_INET) 712 { 713 /* Check mbuf length here??? */ 714 struct ip *ip = mtod (m, struct ip*); 715 struct tcphdr *tcp = (struct tcphdr*) ((int32_t*)ip + ip->ip_hl); 716 717 /* 718 * When using dynamic local IP address assignment by using 719 * 0.0.0.0 as a local address, the first TCP session will 720 * not connect because the local TCP checksum is computed 721 * using 0.0.0.0 which will later become our real IP address 722 * so the TCP checksum computed at the remote end will 723 * become invalid. So we 724 * - don't let packets with src ip addr 0 thru 725 * - we flag TCP packets with src ip 0 as an error 726 */ 727 728 if(ip->ip_src.s_addr == INADDR_ANY) /* -hm */ 729 { 730 m_freem(m); 731 splx(s); 732 if(ip->ip_p == IPPROTO_TCP) 733 return(EADDRNOTAVAIL); 734 else 735 return(0); 736 } 737 738 /* 739 * Put low delay, telnet, rlogin and ftp control packets 740 * in front of the queue. 741 */ 742 743 if (! IF_QFULL (&sp->pp_fastq) && 744 ((ip->ip_tos & IPTOS_LOWDELAY) || 745 ((ip->ip_p == IPPROTO_TCP && 746 m->m_len >= sizeof (struct ip) + sizeof (struct tcphdr) && 747 (INTERACTIVE (ntohs (tcp->th_sport)))) || 748 INTERACTIVE (ntohs (tcp->th_dport))))) 749 ifq = &sp->pp_fastq; 750 } 751 #endif 752 753 #ifdef INET6 754 if (dst->sa_family == AF_INET6) { 755 /* XXX do something tricky here? */ 756 } 757 #endif 758 759 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 760 /* 761 * Prepend general data packet PPP header. For now, IP only. 762 */ 763 M_PREPEND (m, PPP_HEADER_LEN, M_DONTWAIT); 764 if (! m) { 765 if (ifp->if_flags & IFF_DEBUG) 766 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 767 SPP_ARGS(ifp)); 768 ++ifp->if_oerrors; 769 splx (s); 770 return (ENOBUFS); 771 } 772 /* 773 * May want to check size of packet 774 * (albeit due to the implementation it's always enough) 775 */ 776 h = mtod (m, struct ppp_header*); 777 if (sp->pp_flags & PP_CISCO) { 778 h->address = CISCO_UNICAST; /* unicast address */ 779 h->control = 0; 780 } else { 781 h->address = PPP_ALLSTATIONS; /* broadcast address */ 782 h->control = PPP_UI; /* Unnumbered Info */ 783 } 784 } 785 786 switch (dst->sa_family) { 787 #ifdef INET 788 case AF_INET: /* Internet Protocol */ 789 if (sp->pp_flags & PP_CISCO) 790 protocol = htons (ETHERTYPE_IP); 791 else { 792 /* 793 * Don't choke with an ENETDOWN early. It's 794 * possible that we just started dialing out, 795 * so don't drop the packet immediately. If 796 * we notice that we run out of buffer space 797 * below, we will however remember that we are 798 * not ready to carry IP packets, and return 799 * ENETDOWN, as opposed to ENOBUFS. 800 */ 801 protocol = htons(PPP_IP); 802 if (sp->state[IDX_IPCP] != STATE_OPENED) 803 rv = ENETDOWN; 804 } 805 break; 806 #endif 807 #ifdef INET6 808 case AF_INET6: /* Internet Protocol version 6 */ 809 if (sp->pp_flags & PP_CISCO) 810 protocol = htons (ETHERTYPE_IPV6); 811 else { 812 /* 813 * Don't choke with an ENETDOWN early. It's 814 * possible that we just started dialing out, 815 * so don't drop the packet immediately. If 816 * we notice that we run out of buffer space 817 * below, we will however remember that we are 818 * not ready to carry IP packets, and return 819 * ENETDOWN, as opposed to ENOBUFS. 820 */ 821 protocol = htons(PPP_IPV6); 822 if (sp->state[IDX_IPV6CP] != STATE_OPENED) 823 rv = ENETDOWN; 824 } 825 break; 826 #endif 827 #ifdef NS 828 case AF_NS: /* Xerox NS Protocol */ 829 protocol = htons ((sp->pp_flags & PP_CISCO) ? 830 ETHERTYPE_NS : PPP_XNS); 831 break; 832 #endif 833 #ifdef IPX 834 case AF_IPX: /* Novell IPX Protocol */ 835 protocol = htons ((sp->pp_flags & PP_CISCO) ? 836 ETHERTYPE_IPX : PPP_IPX); 837 break; 838 #endif 839 #ifdef ISO 840 case AF_ISO: /* ISO OSI Protocol */ 841 if (sp->pp_flags & PP_CISCO) 842 goto nosupport; 843 protocol = htons (PPP_ISO); 844 break; 845 nosupport: 846 #endif 847 default: 848 m_freem (m); 849 ++ifp->if_oerrors; 850 splx (s); 851 return (EAFNOSUPPORT); 852 } 853 854 if (sp->pp_flags & PP_NOFRAMING) { 855 M_PREPEND (m, 2, M_DONTWAIT); 856 if (m == NULL) { 857 if (ifp->if_flags & IFF_DEBUG) 858 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 859 SPP_ARGS(ifp)); 860 ++ifp->if_oerrors; 861 splx (s); 862 return (ENOBUFS); 863 } 864 *mtod(m, u_int16_t*) = protocol; 865 } else { 866 h->protocol = protocol; 867 } 868 869 /* 870 * Queue message on interface, and start output if interface 871 * not yet active. 872 */ 873 len = m->m_pkthdr.len; 874 if (ifq != NULL 875 #ifdef ALTQ 876 && ALTQ_IS_ENABLED(&ifp->if_snd) == 0 877 #endif 878 ) { 879 if (IF_QFULL (ifq)) { 880 IF_DROP (&ifp->if_snd); 881 m_freem (m); 882 if (rv == 0) 883 rv = ENOBUFS; 884 } 885 IF_ENQUEUE(ifq, m); 886 } else 887 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, rv); 888 if (rv != 0) { 889 ++ifp->if_oerrors; 890 splx(s); 891 return (rv); 892 } 893 894 if (! (ifp->if_flags & IFF_OACTIVE)) 895 (*ifp->if_start) (ifp); 896 897 /* 898 * Count output packets and bytes. 899 * The packet length includes header + additional hardware framing 900 * according to RFC 1333. 901 */ 902 ifp->if_obytes += len + sp->pp_framebytes; 903 splx (s); 904 return (0); 905 } 906 907 void 908 sppp_attach(struct ifnet *ifp) 909 { 910 struct sppp *sp = (struct sppp*) ifp; 911 912 /* Initialize keepalive handler. */ 913 if (! spppq) { 914 callout_init(&keepalive_ch); 915 callout_reset(&keepalive_ch, hz * 10, sppp_keepalive, NULL); 916 } 917 918 /* Insert new entry into the keepalive list. */ 919 sp->pp_next = spppq; 920 spppq = sp; 921 922 sp->pp_if.if_type = IFT_PPP; 923 sp->pp_if.if_output = sppp_output; 924 sp->pp_fastq.ifq_maxlen = 32; 925 sp->pp_cpq.ifq_maxlen = 20; 926 sp->pp_loopcnt = 0; 927 sp->pp_alivecnt = 0; 928 sp->pp_last_activity = 0; 929 sp->pp_idle_timeout = 0; 930 memset(&sp->pp_seq[0], 0, sizeof(sp->pp_seq)); 931 memset(&sp->pp_rseq[0], 0, sizeof(sp->pp_rseq)); 932 sp->pp_auth_failures = 0; 933 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 934 sp->pp_phase = SPPP_PHASE_DEAD; 935 sp->pp_up = lcp.Up; 936 sp->pp_down = lcp.Down; 937 938 if_alloc_sadl(ifp); 939 940 memset(&sp->myauth, 0, sizeof sp->myauth); 941 memset(&sp->hisauth, 0, sizeof sp->hisauth); 942 sppp_lcp_init(sp); 943 sppp_ipcp_init(sp); 944 sppp_ipv6cp_init(sp); 945 sppp_pap_init(sp); 946 sppp_chap_init(sp); 947 } 948 949 void 950 sppp_detach(struct ifnet *ifp) 951 { 952 struct sppp **q, *p, *sp = (struct sppp*) ifp; 953 int i; 954 955 /* Remove the entry from the keepalive list. */ 956 for (q = &spppq; (p = *q); q = &p->pp_next) 957 if (p == sp) { 958 *q = p->pp_next; 959 break; 960 } 961 962 /* Stop keepalive handler. */ 963 if (! spppq) { 964 callout_stop(&keepalive_ch); 965 } 966 967 for (i = 0; i < IDX_COUNT; i++) { 968 callout_stop(&sp->ch[i]); 969 } 970 callout_stop(&sp->pap_my_to_ch); 971 972 /* free authentication info */ 973 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 974 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 975 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 976 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 977 978 if_free_sadl(ifp); 979 } 980 981 /* 982 * Flush the interface output queue. 983 */ 984 void 985 sppp_flush(struct ifnet *ifp) 986 { 987 struct sppp *sp = (struct sppp*) ifp; 988 989 IFQ_PURGE (&sp->pp_if.if_snd); 990 IF_PURGE (&sp->pp_fastq); 991 IF_PURGE (&sp->pp_cpq); 992 } 993 994 /* 995 * Check if the output queue is empty. 996 */ 997 int 998 sppp_isempty(struct ifnet *ifp) 999 { 1000 struct sppp *sp = (struct sppp*) ifp; 1001 int empty, s; 1002 1003 s = splnet(); 1004 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1005 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1006 splx(s); 1007 return (empty); 1008 } 1009 1010 /* 1011 * Get next packet to send. 1012 */ 1013 struct mbuf * 1014 sppp_dequeue(struct ifnet *ifp) 1015 { 1016 struct sppp *sp = (struct sppp*) ifp; 1017 struct mbuf *m; 1018 int s; 1019 1020 s = splnet(); 1021 /* 1022 * Process only the control protocol queue until we have at 1023 * least one NCP open. 1024 * 1025 * Do always serve all three queues in Cisco mode. 1026 */ 1027 IF_DEQUEUE(&sp->pp_cpq, m); 1028 if (m == NULL && 1029 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { 1030 IF_DEQUEUE(&sp->pp_fastq, m); 1031 if (m == NULL) 1032 IF_DEQUEUE (&sp->pp_if.if_snd, m); 1033 } 1034 splx(s); 1035 return m; 1036 } 1037 1038 /* 1039 * Pick the next packet, do not remove it from the queue. 1040 */ 1041 struct mbuf * 1042 sppp_pick(struct ifnet *ifp) 1043 { 1044 struct sppp *sp = (struct sppp*)ifp; 1045 struct mbuf *m; 1046 int s; 1047 1048 s= splnet (); 1049 1050 m = sp->pp_cpq.ifq_head; 1051 if (m == NULL && 1052 (sp->pp_phase == SPPP_PHASE_NETWORK || 1053 (sp->pp_flags & PP_CISCO) != 0)) 1054 if ((m = sp->pp_fastq.ifq_head) == NULL) 1055 m = sp->pp_if.if_snd.ifq_head; 1056 splx (s); 1057 return (m); 1058 } 1059 1060 /* 1061 * Process an ioctl request. Called on low priority level. 1062 */ 1063 int 1064 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1065 { 1066 struct ifreq *ifr = (struct ifreq*) data; 1067 struct sppp *sp = (struct sppp*) ifp; 1068 int s, error=0, going_up, going_down, newmode; 1069 1070 s = splnet(); 1071 switch (cmd) { 1072 case SIOCAIFADDR: 1073 case SIOCSIFDSTADDR: 1074 break; 1075 1076 case SIOCSIFADDR: 1077 if_up(ifp); 1078 /* fall through... */ 1079 1080 case SIOCSIFFLAGS: 1081 going_up = ifp->if_flags & IFF_UP && 1082 (ifp->if_flags & IFF_RUNNING) == 0; 1083 going_down = (ifp->if_flags & IFF_UP) == 0 && 1084 ifp->if_flags & IFF_RUNNING; 1085 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1086 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1087 /* sanity */ 1088 newmode = IFF_PASSIVE; 1089 ifp->if_flags &= ~IFF_AUTO; 1090 } 1091 1092 if (going_up || going_down) 1093 lcp.Close(sp); 1094 if (going_up && newmode == 0) { 1095 /* neither auto-dial nor passive */ 1096 ifp->if_flags |= IFF_RUNNING; 1097 if (!(sp->pp_flags & PP_CISCO)) 1098 lcp.Open(sp); 1099 } else if (going_down) { 1100 sppp_flush(ifp); 1101 ifp->if_flags &= ~IFF_RUNNING; 1102 } 1103 1104 break; 1105 1106 #ifdef SIOCSIFMTU 1107 #ifndef ifr_mtu 1108 #define ifr_mtu ifr_metric 1109 #endif 1110 case SIOCSIFMTU: 1111 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru) 1112 return (EINVAL); 1113 ifp->if_mtu = ifr->ifr_mtu; 1114 break; 1115 #endif 1116 #ifdef SLIOCSETMTU 1117 case SLIOCSETMTU: 1118 if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru) 1119 return (EINVAL); 1120 ifp->if_mtu = *(short*)data; 1121 break; 1122 #endif 1123 #ifdef SIOCGIFMTU 1124 case SIOCGIFMTU: 1125 ifr->ifr_mtu = ifp->if_mtu; 1126 break; 1127 #endif 1128 #ifdef SLIOCGETMTU 1129 case SLIOCGETMTU: 1130 *(short*)data = ifp->if_mtu; 1131 break; 1132 #endif 1133 case SIOCADDMULTI: 1134 case SIOCDELMULTI: 1135 break; 1136 1137 case SPPPSETAUTHCFG: 1138 case SPPPSETLCPCFG: 1139 case SPPPSETIDLETO: 1140 case SPPPSETAUTHFAILURE: 1141 case SPPPSETDNSOPTS: 1142 { 1143 struct proc *p = curproc; /* XXX */ 1144 1145 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1146 break; 1147 } 1148 /* FALLTHROUGH */ 1149 case SPPPGETAUTHCFG: 1150 case SPPPGETLCPCFG: 1151 case SPPPGETSTATUS: 1152 case SPPPGETIDLETO: 1153 case SPPPGETAUTHFAILURES: 1154 case SPPPGETDNSOPTS: 1155 case SPPPGETDNSADDRS: 1156 error = sppp_params(sp, cmd, data); 1157 break; 1158 1159 default: 1160 error = ENOTTY; 1161 } 1162 splx(s); 1163 return (error); 1164 } 1165 1166 1167 /* 1168 * Cisco framing implementation. 1169 */ 1170 1171 /* 1172 * Handle incoming Cisco keepalive protocol packets. 1173 */ 1174 static void 1175 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1176 { 1177 STDDCL; 1178 struct cisco_packet *h; 1179 u_int32_t me, mymask; 1180 1181 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1182 if (debug) 1183 log(LOG_DEBUG, 1184 SPP_FMT "cisco invalid packet length: %d bytes\n", 1185 SPP_ARGS(ifp), m->m_pkthdr.len); 1186 return; 1187 } 1188 h = mtod (m, struct cisco_packet*); 1189 if (debug) 1190 log(LOG_DEBUG, 1191 SPP_FMT "cisco input: %d bytes " 1192 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1193 SPP_ARGS(ifp), m->m_pkthdr.len, 1194 ntohl (h->type), h->par1, h->par2, (u_int)h->rel, 1195 (u_int)h->time0, (u_int)h->time1); 1196 switch (ntohl (h->type)) { 1197 default: 1198 if (debug) 1199 addlog(SPP_FMT "cisco unknown packet type: 0x%x\n", 1200 SPP_ARGS(ifp), ntohl (h->type)); 1201 break; 1202 case CISCO_ADDR_REPLY: 1203 /* Reply on address request, ignore */ 1204 break; 1205 case CISCO_KEEPALIVE_REQ: 1206 sp->pp_alivecnt = 0; 1207 sp->pp_rseq[IDX_LCP] = ntohl (h->par1); 1208 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 1209 /* Local and remote sequence numbers are equal. 1210 * Probably, the line is in loopback mode. */ 1211 if (sp->pp_loopcnt >= MAXALIVECNT) { 1212 printf (SPP_FMT "loopback\n", 1213 SPP_ARGS(ifp)); 1214 sp->pp_loopcnt = 0; 1215 if (ifp->if_flags & IFF_UP) { 1216 if_down (ifp); 1217 IF_PURGE (&sp->pp_cpq); 1218 } 1219 } 1220 ++sp->pp_loopcnt; 1221 1222 /* Generate new local sequence number */ 1223 sp->pp_seq[IDX_LCP] = random(); 1224 break; 1225 } 1226 sp->pp_loopcnt = 0; 1227 if (! (ifp->if_flags & IFF_UP) && 1228 (ifp->if_flags & IFF_RUNNING)) { 1229 if_up(ifp); 1230 } 1231 break; 1232 case CISCO_ADDR_REQ: 1233 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1234 if (me != 0L) 1235 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1236 break; 1237 } 1238 } 1239 1240 /* 1241 * Send Cisco keepalive packet. 1242 */ 1243 static void 1244 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1245 { 1246 STDDCL; 1247 struct ppp_header *h; 1248 struct cisco_packet *ch; 1249 struct mbuf *m; 1250 u_int32_t t = (time.tv_sec - boottime.tv_sec) * 1000; 1251 1252 MGETHDR (m, M_DONTWAIT, MT_DATA); 1253 if (! m) 1254 return; 1255 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1256 m->m_pkthdr.rcvif = 0; 1257 1258 h = mtod (m, struct ppp_header*); 1259 h->address = CISCO_MULTICAST; 1260 h->control = 0; 1261 h->protocol = htons (CISCO_KEEPALIVE); 1262 1263 ch = (struct cisco_packet*) (h + 1); 1264 ch->type = htonl (type); 1265 ch->par1 = htonl (par1); 1266 ch->par2 = htonl (par2); 1267 ch->rel = -1; 1268 1269 ch->time0 = htons ((u_short) (t >> 16)); 1270 ch->time1 = htons ((u_short) t); 1271 1272 if (debug) 1273 log(LOG_DEBUG, 1274 SPP_FMT "cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1275 SPP_ARGS(ifp), ntohl (ch->type), ch->par1, 1276 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1277 (u_int)ch->time1); 1278 1279 if (IF_QFULL (&sp->pp_cpq)) { 1280 IF_DROP (&sp->pp_fastq); 1281 IF_DROP (&ifp->if_snd); 1282 m_freem (m); 1283 } else 1284 IF_ENQUEUE (&sp->pp_cpq, m); 1285 if (! (ifp->if_flags & IFF_OACTIVE)) 1286 (*ifp->if_start) (ifp); 1287 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1288 } 1289 1290 /* 1291 * PPP protocol implementation. 1292 */ 1293 1294 /* 1295 * Send PPP control protocol packet. 1296 */ 1297 static void 1298 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1299 u_char ident, u_short len, void *data) 1300 { 1301 STDDCL; 1302 struct lcp_header *lh; 1303 struct mbuf *m; 1304 size_t pkthdrlen; 1305 1306 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1307 1308 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1309 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1310 MGETHDR (m, M_DONTWAIT, MT_DATA); 1311 if (! m) 1312 return; 1313 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1314 m->m_pkthdr.rcvif = 0; 1315 1316 if (sp->pp_flags & PP_NOFRAMING) { 1317 *mtod(m, u_int16_t*) = htons(proto); 1318 lh = (struct lcp_header*)(mtod(m, u_int8_t*) + 2); 1319 } else { 1320 struct ppp_header *h; 1321 h = mtod (m, struct ppp_header*); 1322 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1323 h->control = PPP_UI; /* Unnumbered Info */ 1324 h->protocol = htons (proto); /* Link Control Protocol */ 1325 lh = (struct lcp_header*) (h + 1); 1326 } 1327 lh->type = type; 1328 lh->ident = ident; 1329 lh->len = htons (LCP_HEADER_LEN + len); 1330 if (len) 1331 bcopy (data, lh+1, len); 1332 1333 if (debug) { 1334 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 1335 SPP_ARGS(ifp), 1336 sppp_proto_name(proto), 1337 sppp_cp_type_name (lh->type), lh->ident, 1338 ntohs (lh->len)); 1339 if (len) 1340 sppp_print_bytes ((u_char*) (lh+1), len); 1341 addlog(">\n"); 1342 } 1343 if (IF_QFULL (&sp->pp_cpq)) { 1344 IF_DROP (&sp->pp_fastq); 1345 IF_DROP (&ifp->if_snd); 1346 m_freem (m); 1347 ++ifp->if_oerrors; 1348 } else 1349 IF_ENQUEUE (&sp->pp_cpq, m); 1350 if (! (ifp->if_flags & IFF_OACTIVE)) 1351 (*ifp->if_start) (ifp); 1352 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1353 } 1354 1355 /* 1356 * Handle incoming PPP control protocol packets. 1357 */ 1358 static void 1359 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1360 { 1361 STDDCL; 1362 struct lcp_header *h; 1363 int len = m->m_pkthdr.len; 1364 int rv; 1365 u_char *p; 1366 u_int32_t u32; 1367 1368 if (len < 4) { 1369 if (debug) 1370 log(LOG_DEBUG, 1371 SPP_FMT "%s invalid packet length: %d bytes\n", 1372 SPP_ARGS(ifp), cp->name, len); 1373 return; 1374 } 1375 h = mtod (m, struct lcp_header*); 1376 if (debug) { 1377 log(LOG_DEBUG, 1378 SPP_FMT "%s input(%s): <%s id=0x%x len=%d", 1379 SPP_ARGS(ifp), cp->name, 1380 sppp_state_name(sp->state[cp->protoidx]), 1381 sppp_cp_type_name (h->type), h->ident, ntohs (h->len)); 1382 if (len > 4) 1383 sppp_print_bytes ((u_char*) (h+1), len-4); 1384 addlog(">\n"); 1385 } 1386 if (len > ntohs (h->len)) 1387 len = ntohs (h->len); 1388 p = (u_char *)(h + 1); 1389 switch (h->type) { 1390 case CONF_REQ: 1391 if (len < 4) { 1392 if (debug) 1393 addlog(SPP_FMT "%s invalid conf-req length %d\n", 1394 SPP_ARGS(ifp), cp->name, 1395 len); 1396 ++ifp->if_ierrors; 1397 break; 1398 } 1399 /* handle states where RCR doesn't get a SCA/SCN */ 1400 switch (sp->state[cp->protoidx]) { 1401 case STATE_CLOSING: 1402 case STATE_STOPPING: 1403 return; 1404 case STATE_CLOSED: 1405 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1406 0, 0); 1407 return; 1408 } 1409 rv = (cp->RCR)(sp, h, len); 1410 switch (sp->state[cp->protoidx]) { 1411 case STATE_OPENED: 1412 (cp->tld)(sp); 1413 (cp->scr)(sp); 1414 /* fall through... */ 1415 case STATE_ACK_SENT: 1416 case STATE_REQ_SENT: 1417 sppp_cp_change_state(cp, sp, rv? 1418 STATE_ACK_SENT: STATE_REQ_SENT); 1419 break; 1420 case STATE_STOPPED: 1421 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1422 (cp->scr)(sp); 1423 sppp_cp_change_state(cp, sp, rv? 1424 STATE_ACK_SENT: STATE_REQ_SENT); 1425 break; 1426 case STATE_ACK_RCVD: 1427 if (rv) { 1428 sppp_cp_change_state(cp, sp, STATE_OPENED); 1429 if (debug) 1430 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1431 SPP_ARGS(ifp), 1432 cp->name); 1433 (cp->tlu)(sp); 1434 } else 1435 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1436 break; 1437 default: 1438 printf(SPP_FMT "%s illegal %s in state %s\n", 1439 SPP_ARGS(ifp), cp->name, 1440 sppp_cp_type_name(h->type), 1441 sppp_state_name(sp->state[cp->protoidx])); 1442 ++ifp->if_ierrors; 1443 } 1444 break; 1445 case CONF_ACK: 1446 if (h->ident != sp->confid[cp->protoidx]) { 1447 if (debug) 1448 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1449 SPP_ARGS(ifp), cp->name, 1450 h->ident, sp->confid[cp->protoidx]); 1451 ++ifp->if_ierrors; 1452 break; 1453 } 1454 switch (sp->state[cp->protoidx]) { 1455 case STATE_CLOSED: 1456 case STATE_STOPPED: 1457 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1458 break; 1459 case STATE_CLOSING: 1460 case STATE_STOPPING: 1461 break; 1462 case STATE_REQ_SENT: 1463 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1464 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1465 break; 1466 case STATE_OPENED: 1467 (cp->tld)(sp); 1468 /* fall through */ 1469 case STATE_ACK_RCVD: 1470 (cp->scr)(sp); 1471 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1472 break; 1473 case STATE_ACK_SENT: 1474 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1475 sppp_cp_change_state(cp, sp, STATE_OPENED); 1476 if (debug) 1477 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1478 SPP_ARGS(ifp), cp->name); 1479 (cp->tlu)(sp); 1480 break; 1481 default: 1482 printf(SPP_FMT "%s illegal %s in state %s\n", 1483 SPP_ARGS(ifp), cp->name, 1484 sppp_cp_type_name(h->type), 1485 sppp_state_name(sp->state[cp->protoidx])); 1486 ++ifp->if_ierrors; 1487 } 1488 break; 1489 case CONF_NAK: 1490 case CONF_REJ: 1491 if (h->ident != sp->confid[cp->protoidx]) { 1492 if (debug) 1493 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1494 SPP_ARGS(ifp), cp->name, 1495 h->ident, sp->confid[cp->protoidx]); 1496 ++ifp->if_ierrors; 1497 break; 1498 } 1499 if (h->type == CONF_NAK) 1500 (cp->RCN_nak)(sp, h, len); 1501 else /* CONF_REJ */ 1502 (cp->RCN_rej)(sp, h, len); 1503 1504 switch (sp->state[cp->protoidx]) { 1505 case STATE_CLOSED: 1506 case STATE_STOPPED: 1507 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1508 break; 1509 case STATE_REQ_SENT: 1510 case STATE_ACK_SENT: 1511 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1512 (cp->scr)(sp); 1513 break; 1514 case STATE_OPENED: 1515 (cp->tld)(sp); 1516 /* fall through */ 1517 case STATE_ACK_RCVD: 1518 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1519 (cp->scr)(sp); 1520 break; 1521 case STATE_CLOSING: 1522 case STATE_STOPPING: 1523 break; 1524 default: 1525 printf(SPP_FMT "%s illegal %s in state %s\n", 1526 SPP_ARGS(ifp), cp->name, 1527 sppp_cp_type_name(h->type), 1528 sppp_state_name(sp->state[cp->protoidx])); 1529 ++ifp->if_ierrors; 1530 } 1531 break; 1532 1533 case TERM_REQ: 1534 switch (sp->state[cp->protoidx]) { 1535 case STATE_ACK_RCVD: 1536 case STATE_ACK_SENT: 1537 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1538 /* fall through */ 1539 case STATE_CLOSED: 1540 case STATE_STOPPED: 1541 case STATE_CLOSING: 1542 case STATE_STOPPING: 1543 case STATE_REQ_SENT: 1544 sta: 1545 /* Send Terminate-Ack packet. */ 1546 if (debug) 1547 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n", 1548 SPP_ARGS(ifp), cp->name); 1549 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1550 break; 1551 case STATE_OPENED: 1552 (cp->tld)(sp); 1553 sp->rst_counter[cp->protoidx] = 0; 1554 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1555 goto sta; 1556 break; 1557 default: 1558 printf(SPP_FMT "%s illegal %s in state %s\n", 1559 SPP_ARGS(ifp), cp->name, 1560 sppp_cp_type_name(h->type), 1561 sppp_state_name(sp->state[cp->protoidx])); 1562 ++ifp->if_ierrors; 1563 } 1564 break; 1565 case TERM_ACK: 1566 switch (sp->state[cp->protoidx]) { 1567 case STATE_CLOSED: 1568 case STATE_STOPPED: 1569 case STATE_REQ_SENT: 1570 case STATE_ACK_SENT: 1571 break; 1572 case STATE_CLOSING: 1573 (cp->tlf)(sp); 1574 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1575 sppp_lcp_check_and_close(sp); 1576 break; 1577 case STATE_STOPPING: 1578 (cp->tlf)(sp); 1579 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1580 sppp_lcp_check_and_close(sp); 1581 break; 1582 case STATE_ACK_RCVD: 1583 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1584 break; 1585 case STATE_OPENED: 1586 (cp->tld)(sp); 1587 (cp->scr)(sp); 1588 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1589 break; 1590 default: 1591 printf(SPP_FMT "%s illegal %s in state %s\n", 1592 SPP_ARGS(ifp), cp->name, 1593 sppp_cp_type_name(h->type), 1594 sppp_state_name(sp->state[cp->protoidx])); 1595 ++ifp->if_ierrors; 1596 } 1597 break; 1598 case CODE_REJ: 1599 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1600 log(LOG_INFO, 1601 SPP_FMT "%s: ignoring RXJ (%s) for code ?, " 1602 "danger will robinson\n", 1603 SPP_ARGS(ifp), cp->name, 1604 sppp_cp_type_name(h->type)); 1605 switch (sp->state[cp->protoidx]) { 1606 case STATE_CLOSED: 1607 case STATE_STOPPED: 1608 case STATE_REQ_SENT: 1609 case STATE_ACK_SENT: 1610 case STATE_CLOSING: 1611 case STATE_STOPPING: 1612 case STATE_OPENED: 1613 break; 1614 case STATE_ACK_RCVD: 1615 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1616 break; 1617 default: 1618 printf(SPP_FMT "%s illegal %s in state %s\n", 1619 SPP_ARGS(ifp), cp->name, 1620 sppp_cp_type_name(h->type), 1621 sppp_state_name(sp->state[cp->protoidx])); 1622 ++ifp->if_ierrors; 1623 } 1624 break; 1625 case PROTO_REJ: 1626 { 1627 int catastrophic; 1628 const struct cp *upper; 1629 int i; 1630 u_int16_t proto; 1631 1632 catastrophic = 0; 1633 upper = NULL; 1634 proto = p[0] << 8 | p[1]; 1635 for (i = 0; i < IDX_COUNT; i++) { 1636 if (cps[i]->proto == proto) { 1637 upper = cps[i]; 1638 break; 1639 } 1640 } 1641 if (upper == NULL) 1642 catastrophic++; 1643 1644 if (debug) 1645 log(LOG_INFO, 1646 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1647 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+', 1648 sppp_cp_type_name(h->type), proto, 1649 upper ? upper->name : "unknown", 1650 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1651 1652 /* 1653 * if we got RXJ+ against conf-req, the peer does not implement 1654 * this particular protocol type. terminate the protocol. 1655 */ 1656 if (upper && !catastrophic) { 1657 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1658 upper->Close(sp); 1659 break; 1660 } 1661 } 1662 1663 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1664 switch (sp->state[cp->protoidx]) { 1665 case STATE_CLOSED: 1666 case STATE_STOPPED: 1667 case STATE_REQ_SENT: 1668 case STATE_ACK_SENT: 1669 case STATE_CLOSING: 1670 case STATE_STOPPING: 1671 case STATE_OPENED: 1672 break; 1673 case STATE_ACK_RCVD: 1674 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1675 break; 1676 default: 1677 printf(SPP_FMT "%s illegal %s in state %s\n", 1678 SPP_ARGS(ifp), cp->name, 1679 sppp_cp_type_name(h->type), 1680 sppp_state_name(sp->state[cp->protoidx])); 1681 ++ifp->if_ierrors; 1682 } 1683 break; 1684 } 1685 case DISC_REQ: 1686 if (cp->proto != PPP_LCP) 1687 goto illegal; 1688 /* Discard the packet. */ 1689 break; 1690 case ECHO_REQ: 1691 if (cp->proto != PPP_LCP) 1692 goto illegal; 1693 if (sp->state[cp->protoidx] != STATE_OPENED) { 1694 if (debug) 1695 addlog(SPP_FMT "lcp echo req but lcp closed\n", 1696 SPP_ARGS(ifp)); 1697 ++ifp->if_ierrors; 1698 break; 1699 } 1700 if (len < 8) { 1701 if (debug) 1702 addlog(SPP_FMT "invalid lcp echo request " 1703 "packet length: %d bytes\n", 1704 SPP_ARGS(ifp), len); 1705 break; 1706 } 1707 memcpy(&u32, h + 1, sizeof u32); 1708 if (ntohl(u32) == sp->lcp.magic) { 1709 /* Line loopback mode detected. */ 1710 printf(SPP_FMT "loopback\n", SPP_ARGS(ifp)); 1711 if_down (ifp); 1712 IF_PURGE (&sp->pp_cpq); 1713 1714 /* Shut down the PPP link. */ 1715 /* XXX */ 1716 lcp.Down(sp); 1717 lcp.Up(sp); 1718 break; 1719 } 1720 u32 = htonl(sp->lcp.magic); 1721 memcpy(h + 1, &u32, sizeof u32); 1722 if (debug) 1723 addlog(SPP_FMT "got lcp echo req, sending echo rep\n", 1724 SPP_ARGS(ifp)); 1725 sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1); 1726 break; 1727 case ECHO_REPLY: 1728 if (cp->proto != PPP_LCP) 1729 goto illegal; 1730 if (h->ident != sp->lcp.echoid) { 1731 ++ifp->if_ierrors; 1732 break; 1733 } 1734 if (len < 8) { 1735 if (debug) 1736 addlog(SPP_FMT "lcp invalid echo reply " 1737 "packet length: %d bytes\n", 1738 SPP_ARGS(ifp), len); 1739 break; 1740 } 1741 if (debug) 1742 addlog(SPP_FMT "lcp got echo rep\n", 1743 SPP_ARGS(ifp)); 1744 memcpy(&u32, h + 1, sizeof u32); 1745 if (ntohl(u32) != sp->lcp.magic) 1746 sp->pp_alivecnt = 0; 1747 break; 1748 default: 1749 /* Unknown packet type -- send Code-Reject packet. */ 1750 illegal: 1751 if (debug) 1752 addlog(SPP_FMT "%s send code-rej for 0x%x\n", 1753 SPP_ARGS(ifp), cp->name, h->type); 1754 sppp_cp_send(sp, cp->proto, CODE_REJ, 1755 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 1756 ++ifp->if_ierrors; 1757 } 1758 } 1759 1760 1761 /* 1762 * The generic part of all Up/Down/Open/Close/TO event handlers. 1763 * Basically, the state transition handling in the automaton. 1764 */ 1765 static void 1766 sppp_up_event(const struct cp *cp, struct sppp *sp) 1767 { 1768 STDDCL; 1769 1770 if (debug) 1771 log(LOG_DEBUG, SPP_FMT "%s up(%s)\n", 1772 SPP_ARGS(ifp), cp->name, 1773 sppp_state_name(sp->state[cp->protoidx])); 1774 1775 switch (sp->state[cp->protoidx]) { 1776 case STATE_INITIAL: 1777 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1778 break; 1779 case STATE_STARTING: 1780 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1781 (cp->scr)(sp); 1782 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1783 break; 1784 default: 1785 printf(SPP_FMT "%s illegal up in state %s\n", 1786 SPP_ARGS(ifp), cp->name, 1787 sppp_state_name(sp->state[cp->protoidx])); 1788 } 1789 } 1790 1791 static void 1792 sppp_down_event(const struct cp *cp, struct sppp *sp) 1793 { 1794 STDDCL; 1795 1796 if (debug) 1797 log(LOG_DEBUG, SPP_FMT "%s down(%s)\n", 1798 SPP_ARGS(ifp), cp->name, 1799 sppp_state_name(sp->state[cp->protoidx])); 1800 1801 switch (sp->state[cp->protoidx]) { 1802 case STATE_CLOSED: 1803 case STATE_CLOSING: 1804 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1805 break; 1806 case STATE_STOPPED: 1807 (cp->tls)(sp); 1808 /* fall through */ 1809 case STATE_STOPPING: 1810 case STATE_REQ_SENT: 1811 case STATE_ACK_RCVD: 1812 case STATE_ACK_SENT: 1813 sppp_cp_change_state(cp, sp, STATE_STARTING); 1814 break; 1815 case STATE_OPENED: 1816 (cp->tld)(sp); 1817 sppp_cp_change_state(cp, sp, STATE_STARTING); 1818 break; 1819 default: 1820 printf(SPP_FMT "%s illegal down in state %s\n", 1821 SPP_ARGS(ifp), cp->name, 1822 sppp_state_name(sp->state[cp->protoidx])); 1823 } 1824 } 1825 1826 1827 static void 1828 sppp_open_event(const struct cp *cp, struct sppp *sp) 1829 { 1830 STDDCL; 1831 1832 if (debug) 1833 log(LOG_DEBUG, SPP_FMT "%s open(%s)\n", 1834 SPP_ARGS(ifp), cp->name, 1835 sppp_state_name(sp->state[cp->protoidx])); 1836 1837 switch (sp->state[cp->protoidx]) { 1838 case STATE_INITIAL: 1839 (cp->tls)(sp); 1840 sppp_cp_change_state(cp, sp, STATE_STARTING); 1841 break; 1842 case STATE_STARTING: 1843 break; 1844 case STATE_CLOSED: 1845 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1846 (cp->scr)(sp); 1847 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1848 break; 1849 case STATE_STOPPED: 1850 case STATE_STOPPING: 1851 case STATE_REQ_SENT: 1852 case STATE_ACK_RCVD: 1853 case STATE_ACK_SENT: 1854 case STATE_OPENED: 1855 break; 1856 case STATE_CLOSING: 1857 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1858 break; 1859 } 1860 } 1861 1862 1863 static void 1864 sppp_close_event(const struct cp *cp, struct sppp *sp) 1865 { 1866 STDDCL; 1867 1868 if (debug) 1869 log(LOG_DEBUG, SPP_FMT "%s close(%s)\n", 1870 SPP_ARGS(ifp), cp->name, 1871 sppp_state_name(sp->state[cp->protoidx])); 1872 1873 switch (sp->state[cp->protoidx]) { 1874 case STATE_INITIAL: 1875 case STATE_CLOSED: 1876 case STATE_CLOSING: 1877 break; 1878 case STATE_STARTING: 1879 (cp->tlf)(sp); 1880 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1881 break; 1882 case STATE_STOPPED: 1883 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1884 break; 1885 case STATE_STOPPING: 1886 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1887 break; 1888 case STATE_OPENED: 1889 (cp->tld)(sp); 1890 /* fall through */ 1891 case STATE_REQ_SENT: 1892 case STATE_ACK_RCVD: 1893 case STATE_ACK_SENT: 1894 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 1895 sppp_cp_send(sp, cp->proto, TERM_REQ, 1896 ++sp->pp_seq[cp->protoidx], 0, 0); 1897 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1898 break; 1899 } 1900 } 1901 1902 static void 1903 sppp_to_event(const struct cp *cp, struct sppp *sp) 1904 { 1905 STDDCL; 1906 int s; 1907 1908 s = splnet(); 1909 if (debug) 1910 log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n", 1911 SPP_ARGS(ifp), cp->name, 1912 sppp_state_name(sp->state[cp->protoidx]), 1913 sp->rst_counter[cp->protoidx]); 1914 1915 if (--sp->rst_counter[cp->protoidx] < 0) 1916 /* TO- event */ 1917 switch (sp->state[cp->protoidx]) { 1918 case STATE_CLOSING: 1919 (cp->tlf)(sp); 1920 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1921 sppp_lcp_check_and_close(sp); 1922 break; 1923 case STATE_STOPPING: 1924 (cp->tlf)(sp); 1925 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1926 sppp_lcp_check_and_close(sp); 1927 break; 1928 case STATE_REQ_SENT: 1929 case STATE_ACK_RCVD: 1930 case STATE_ACK_SENT: 1931 (cp->tlf)(sp); 1932 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1933 sppp_lcp_check_and_close(sp); 1934 break; 1935 } 1936 else 1937 /* TO+ event */ 1938 switch (sp->state[cp->protoidx]) { 1939 case STATE_CLOSING: 1940 case STATE_STOPPING: 1941 sppp_cp_send(sp, cp->proto, TERM_REQ, 1942 ++sp->pp_seq[cp->protoidx], 0, 0); 1943 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1944 cp->TO, sp); 1945 break; 1946 case STATE_REQ_SENT: 1947 case STATE_ACK_RCVD: 1948 (cp->scr)(sp); 1949 /* sppp_cp_change_state() will restart the timer */ 1950 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1951 break; 1952 case STATE_ACK_SENT: 1953 (cp->scr)(sp); 1954 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1955 cp->TO, sp); 1956 break; 1957 } 1958 1959 splx(s); 1960 } 1961 1962 /* 1963 * Change the state of a control protocol in the state automaton. 1964 * Takes care of starting/stopping the restart timer. 1965 */ 1966 void 1967 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 1968 { 1969 sp->state[cp->protoidx] = newstate; 1970 callout_stop(&sp->ch[cp->protoidx]); 1971 switch (newstate) { 1972 case STATE_INITIAL: 1973 case STATE_STARTING: 1974 case STATE_CLOSED: 1975 case STATE_STOPPED: 1976 case STATE_OPENED: 1977 break; 1978 case STATE_CLOSING: 1979 case STATE_STOPPING: 1980 case STATE_REQ_SENT: 1981 case STATE_ACK_RCVD: 1982 case STATE_ACK_SENT: 1983 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1984 cp->TO, sp); 1985 break; 1986 } 1987 } 1988 1989 /* 1990 *--------------------------------------------------------------------------* 1991 * * 1992 * The LCP implementation. * 1993 * * 1994 *--------------------------------------------------------------------------* 1995 */ 1996 static void 1997 sppp_lcp_init(struct sppp *sp) 1998 { 1999 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 2000 sp->lcp.magic = 0; 2001 sp->state[IDX_LCP] = STATE_INITIAL; 2002 sp->fail_counter[IDX_LCP] = 0; 2003 sp->pp_seq[IDX_LCP] = 0; 2004 sp->pp_rseq[IDX_LCP] = 0; 2005 sp->lcp.protos = 0; 2006 sp->lcp.mru = sp->lcp.their_mru = PP_MTU; 2007 2008 /* 2009 * Initialize counters and timeout values. Note that we don't 2010 * use the 3 seconds suggested in RFC 1661 since we are likely 2011 * running on a fast link. XXX We should probably implement 2012 * the exponential backoff option. Note that these values are 2013 * relevant for all control protocols, not just LCP only. 2014 */ 2015 sp->lcp.timeout = 1 * hz; 2016 sp->lcp.max_terminate = 2; 2017 sp->lcp.max_configure = 10; 2018 sp->lcp.max_failure = 10; 2019 callout_init(&sp->ch[IDX_LCP]); 2020 } 2021 2022 static void 2023 sppp_lcp_up(struct sppp *sp) 2024 { 2025 STDDCL; 2026 2027 /* Initialize activity timestamp: opening a connection is an activity */ 2028 sp->pp_last_activity = time.tv_sec; 2029 2030 /* 2031 * If this interface is passive or dial-on-demand, and we are 2032 * still in Initial state, it means we've got an incoming 2033 * call. Activate the interface. 2034 */ 2035 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2036 if (debug) 2037 log(LOG_DEBUG, 2038 SPP_FMT "Up event", SPP_ARGS(ifp)); 2039 ifp->if_flags |= IFF_RUNNING; 2040 if (sp->state[IDX_LCP] == STATE_INITIAL) { 2041 if (debug) 2042 addlog("(incoming call)\n"); 2043 sp->pp_flags |= PP_CALLIN; 2044 lcp.Open(sp); 2045 } else if (debug) 2046 addlog("\n"); 2047 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 && 2048 (sp->state[IDX_LCP] == STATE_INITIAL)) { 2049 ifp->if_flags |= IFF_RUNNING; 2050 lcp.Open(sp); 2051 } 2052 2053 sppp_up_event(&lcp, sp); 2054 } 2055 2056 static void 2057 sppp_lcp_down(struct sppp *sp) 2058 { 2059 STDDCL; 2060 2061 sppp_down_event(&lcp, sp); 2062 2063 /* 2064 * If this is neither a dial-on-demand nor a passive 2065 * interface, simulate an ``ifconfig down'' action, so the 2066 * administrator can force a redial by another ``ifconfig 2067 * up''. XXX For leased line operation, should we immediately 2068 * try to reopen the connection here? 2069 */ 2070 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2071 if (debug) 2072 log(LOG_INFO, 2073 SPP_FMT "Down event (carrier loss), taking interface down.\n", 2074 SPP_ARGS(ifp)); 2075 if_down(ifp); 2076 } else { 2077 if (debug) 2078 log(LOG_DEBUG, 2079 SPP_FMT "Down event (carrier loss)\n", 2080 SPP_ARGS(ifp)); 2081 } 2082 sp->pp_flags &= ~PP_CALLIN; 2083 if (sp->state[IDX_LCP] != STATE_INITIAL) 2084 lcp.Close(sp); 2085 ifp->if_flags &= ~IFF_RUNNING; 2086 } 2087 2088 static void 2089 sppp_lcp_open(struct sppp *sp) 2090 { 2091 /* 2092 * If we are authenticator, negotiate LCP_AUTH 2093 */ 2094 if (sp->hisauth.proto != 0) 2095 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2096 else 2097 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2098 sp->pp_flags &= ~PP_NEEDAUTH; 2099 sppp_open_event(&lcp, sp); 2100 } 2101 2102 static void 2103 sppp_lcp_close(struct sppp *sp) 2104 { 2105 sppp_close_event(&lcp, sp); 2106 } 2107 2108 static void 2109 sppp_lcp_TO(void *cookie) 2110 { 2111 sppp_to_event(&lcp, (struct sppp *)cookie); 2112 } 2113 2114 /* 2115 * Analyze a configure request. Return true if it was agreeable, and 2116 * caused action sca, false if it has been rejected or nak'ed, and 2117 * caused action scn. (The return value is used to make the state 2118 * transition decision in the state automaton.) 2119 */ 2120 static int 2121 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2122 { 2123 STDDCL; 2124 u_char *buf, *r, *p; 2125 int origlen, rlen; 2126 u_int32_t nmagic; 2127 u_short authproto; 2128 2129 len -= 4; 2130 origlen = len; 2131 buf = r = malloc (len, M_TEMP, M_NOWAIT); 2132 if (! buf) 2133 return (0); 2134 2135 if (debug) 2136 log(LOG_DEBUG, SPP_FMT "lcp parse opts:", 2137 SPP_ARGS(ifp)); 2138 2139 /* pass 1: check for things that need to be rejected */ 2140 p = (void*) (h+1); 2141 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2142 if (debug) 2143 addlog(" %s", sppp_lcp_opt_name(*p)); 2144 switch (*p) { 2145 case LCP_OPT_MAGIC: 2146 /* Magic number. */ 2147 /* fall through, both are same length */ 2148 case LCP_OPT_ASYNC_MAP: 2149 /* Async control character map. */ 2150 if (len >= 6 || p[1] == 6) 2151 continue; 2152 if (debug) 2153 addlog(" [invalid]"); 2154 break; 2155 case LCP_OPT_MRU: 2156 /* Maximum receive unit. */ 2157 if (len >= 4 && p[1] == 4) 2158 continue; 2159 if (debug) 2160 addlog(" [invalid]"); 2161 break; 2162 case LCP_OPT_AUTH_PROTO: 2163 if (len < 4) { 2164 if (debug) 2165 addlog(" [invalid]"); 2166 break; 2167 } 2168 authproto = (p[2] << 8) + p[3]; 2169 if (authproto == PPP_CHAP && p[1] != 5) { 2170 if (debug) 2171 addlog(" [invalid chap len]"); 2172 break; 2173 } 2174 if (sp->myauth.proto == 0) { 2175 /* we are not configured to do auth */ 2176 if (debug) 2177 addlog(" [not configured]"); 2178 break; 2179 } 2180 /* 2181 * Remote want us to authenticate, remember this, 2182 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2183 * up. 2184 */ 2185 sp->pp_flags |= PP_NEEDAUTH; 2186 continue; 2187 default: 2188 /* Others not supported. */ 2189 if (debug) 2190 addlog(" [rej]"); 2191 break; 2192 } 2193 /* Add the option to rejected list. */ 2194 bcopy (p, r, p[1]); 2195 r += p[1]; 2196 rlen += p[1]; 2197 } 2198 if (rlen) { 2199 if (debug) 2200 addlog(" send conf-rej\n"); 2201 sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2202 goto end; 2203 } else if (debug) 2204 addlog("\n"); 2205 2206 /* 2207 * pass 2: check for option values that are unacceptable and 2208 * thus require to be nak'ed. 2209 */ 2210 if (debug) 2211 log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ", 2212 SPP_ARGS(ifp)); 2213 2214 p = (void*) (h+1); 2215 len = origlen; 2216 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2217 if (debug) 2218 addlog(" %s", sppp_lcp_opt_name(*p)); 2219 switch (*p) { 2220 case LCP_OPT_MAGIC: 2221 /* Magic number -- extract. */ 2222 nmagic = (u_int32_t)p[2] << 24 | 2223 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2224 if (nmagic != sp->lcp.magic) { 2225 if (debug) 2226 addlog(" 0x%x", nmagic); 2227 continue; 2228 } 2229 /* 2230 * Local and remote magics equal -- loopback? 2231 */ 2232 if (sp->pp_loopcnt >= MAXALIVECNT*5) { 2233 printf (SPP_FMT "loopback\n", 2234 SPP_ARGS(ifp)); 2235 sp->pp_loopcnt = 0; 2236 if (ifp->if_flags & IFF_UP) { 2237 if_down(ifp); 2238 IF_PURGE(&sp->pp_cpq); 2239 /* XXX ? */ 2240 lcp.Down(sp); 2241 lcp.Up(sp); 2242 } 2243 } else if (debug) 2244 addlog(" [glitch]"); 2245 ++sp->pp_loopcnt; 2246 /* 2247 * We negate our magic here, and NAK it. If 2248 * we see it later in an NAK packet, we 2249 * suggest a new one. 2250 */ 2251 nmagic = ~sp->lcp.magic; 2252 /* Gonna NAK it. */ 2253 p[2] = nmagic >> 24; 2254 p[3] = nmagic >> 16; 2255 p[4] = nmagic >> 8; 2256 p[5] = nmagic; 2257 break; 2258 2259 case LCP_OPT_ASYNC_MAP: 2260 /* Async control character map -- check to be zero. */ 2261 if (! p[2] && ! p[3] && ! p[4] && ! p[5]) { 2262 if (debug) 2263 addlog(" [empty]"); 2264 continue; 2265 } 2266 if (debug) 2267 addlog(" [non-empty]"); 2268 /* suggest a zero one */ 2269 p[2] = p[3] = p[4] = p[5] = 0; 2270 break; 2271 2272 case LCP_OPT_MRU: 2273 /* 2274 * Maximum receive unit. Always agreeable, 2275 * but ignored by now. 2276 */ 2277 sp->lcp.their_mru = p[2] * 256 + p[3]; 2278 if (debug) 2279 addlog(" %ld", sp->lcp.their_mru); 2280 continue; 2281 2282 case LCP_OPT_AUTH_PROTO: 2283 authproto = (p[2] << 8) + p[3]; 2284 if (sp->myauth.proto != authproto) { 2285 /* not agreed, nak */ 2286 if (debug) 2287 addlog(" [mine %s != his %s]", 2288 sppp_proto_name(sp->hisauth.proto), 2289 sppp_proto_name(authproto)); 2290 p[2] = sp->myauth.proto >> 8; 2291 p[3] = sp->myauth.proto; 2292 break; 2293 } 2294 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2295 if (debug) 2296 addlog(" [chap not MD5]"); 2297 p[4] = CHAP_MD5; 2298 break; 2299 } 2300 continue; 2301 } 2302 /* Add the option to nak'ed list. */ 2303 bcopy (p, r, p[1]); 2304 r += p[1]; 2305 rlen += p[1]; 2306 } 2307 if (rlen) { 2308 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2309 if (debug) 2310 addlog(" max_failure (%d) exceeded, " 2311 "send conf-rej\n", 2312 sp->lcp.max_failure); 2313 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2314 } else { 2315 if (debug) 2316 addlog(" send conf-nak\n"); 2317 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2318 } 2319 goto end; 2320 } else { 2321 if (debug) 2322 addlog(" send conf-ack\n"); 2323 sp->fail_counter[IDX_LCP] = 0; 2324 sp->pp_loopcnt = 0; 2325 sppp_cp_send (sp, PPP_LCP, CONF_ACK, 2326 h->ident, origlen, h+1); 2327 } 2328 2329 end: 2330 free (buf, M_TEMP); 2331 return (rlen == 0); 2332 } 2333 2334 /* 2335 * Analyze the LCP Configure-Reject option list, and adjust our 2336 * negotiation. 2337 */ 2338 static void 2339 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2340 { 2341 STDDCL; 2342 u_char *buf, *p; 2343 2344 len -= 4; 2345 buf = malloc (len, M_TEMP, M_NOWAIT); 2346 if (!buf) 2347 return; 2348 2349 if (debug) 2350 log(LOG_DEBUG, SPP_FMT "lcp rej opts:", 2351 SPP_ARGS(ifp)); 2352 2353 p = (void*) (h+1); 2354 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2355 if (debug) 2356 addlog(" %s", sppp_lcp_opt_name(*p)); 2357 switch (*p) { 2358 case LCP_OPT_MAGIC: 2359 /* Magic number -- can't use it, use 0 */ 2360 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2361 sp->lcp.magic = 0; 2362 break; 2363 case LCP_OPT_MRU: 2364 /* 2365 * Should not be rejected anyway, since we only 2366 * negotiate a MRU if explicitly requested by 2367 * peer. 2368 */ 2369 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2370 break; 2371 case LCP_OPT_AUTH_PROTO: 2372 /* 2373 * Peer doesn't want to authenticate himself, 2374 * deny unless this is a dialout call, and 2375 * SPPP_AUTHFLAG_NOCALLOUT is set. 2376 */ 2377 if ((sp->pp_flags & PP_CALLIN) == 0 && 2378 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2379 if (debug) 2380 addlog(" [don't insist on auth " 2381 "for callout]"); 2382 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2383 break; 2384 } 2385 if (debug) 2386 addlog("[access denied]\n"); 2387 lcp.Close(sp); 2388 break; 2389 } 2390 } 2391 if (debug) 2392 addlog("\n"); 2393 free (buf, M_TEMP); 2394 return; 2395 } 2396 2397 /* 2398 * Analyze the LCP Configure-NAK option list, and adjust our 2399 * negotiation. 2400 */ 2401 static void 2402 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2403 { 2404 STDDCL; 2405 u_char *buf, *p; 2406 u_int32_t magic; 2407 2408 len -= 4; 2409 buf = malloc (len, M_TEMP, M_NOWAIT); 2410 if (!buf) 2411 return; 2412 2413 if (debug) 2414 log(LOG_DEBUG, SPP_FMT "lcp nak opts:", 2415 SPP_ARGS(ifp)); 2416 2417 p = (void*) (h+1); 2418 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2419 if (debug) 2420 addlog(" %s", sppp_lcp_opt_name(*p)); 2421 switch (*p) { 2422 case LCP_OPT_MAGIC: 2423 /* Magic number -- renegotiate */ 2424 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2425 len >= 6 && p[1] == 6) { 2426 magic = (u_int32_t)p[2] << 24 | 2427 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2428 /* 2429 * If the remote magic is our negated one, 2430 * this looks like a loopback problem. 2431 * Suggest a new magic to make sure. 2432 */ 2433 if (magic == ~sp->lcp.magic) { 2434 if (debug) 2435 addlog(" magic glitch"); 2436 sp->lcp.magic = random(); 2437 } else { 2438 sp->lcp.magic = magic; 2439 if (debug) 2440 addlog(" %d", magic); 2441 } 2442 } 2443 break; 2444 case LCP_OPT_MRU: 2445 /* 2446 * Peer wants to advise us to negotiate an MRU. 2447 * Agree on it if it's reasonable, or use 2448 * default otherwise. 2449 */ 2450 if (len >= 4 && p[1] == 4) { 2451 u_int mru = p[2] * 256 + p[3]; 2452 if (debug) 2453 addlog(" %d", mru); 2454 if (mru < PP_MTU || mru > PP_MAX_MRU) 2455 mru = PP_MTU; 2456 sp->lcp.mru = mru; 2457 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2458 } 2459 break; 2460 case LCP_OPT_AUTH_PROTO: 2461 /* 2462 * Peer doesn't like our authentication method, 2463 * deny. 2464 */ 2465 if (debug) 2466 addlog("[access denied]\n"); 2467 lcp.Close(sp); 2468 break; 2469 } 2470 } 2471 if (debug) 2472 addlog("\n"); 2473 free (buf, M_TEMP); 2474 return; 2475 } 2476 2477 static void 2478 sppp_lcp_tlu(struct sppp *sp) 2479 { 2480 STDDCL; 2481 int i; 2482 u_int32_t mask; 2483 2484 /* XXX ? */ 2485 if (! (ifp->if_flags & IFF_UP) && 2486 (ifp->if_flags & IFF_RUNNING)) { 2487 /* Coming out of loopback mode. */ 2488 if_up(ifp); 2489 } 2490 2491 for (i = 0; i < IDX_COUNT; i++) 2492 if ((cps[i])->flags & CP_QUAL) 2493 (cps[i])->Open(sp); 2494 2495 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2496 (sp->pp_flags & PP_NEEDAUTH) != 0) 2497 sp->pp_phase = SPPP_PHASE_AUTHENTICATE; 2498 else 2499 sp->pp_phase = SPPP_PHASE_NETWORK; 2500 2501 if(debug) 2502 { 2503 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2504 sppp_phase_name(sp->pp_phase)); 2505 } 2506 2507 /* 2508 * Open all authentication protocols. This is even required 2509 * if we already proceeded to network phase, since it might be 2510 * that remote wants us to authenticate, so we might have to 2511 * send a PAP request. Undesired authentication protocols 2512 * don't do anything when they get an Open event. 2513 */ 2514 for (i = 0; i < IDX_COUNT; i++) 2515 if ((cps[i])->flags & CP_AUTH) 2516 (cps[i])->Open(sp); 2517 2518 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2519 /* Notify all NCPs. */ 2520 for (i = 0; i < IDX_COUNT; i++) 2521 if ((cps[i])->flags & CP_NCP) 2522 (cps[i])->Open(sp); 2523 } 2524 2525 /* Send Up events to all started protos. */ 2526 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2527 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) 2528 (cps[i])->Up(sp); 2529 2530 /* notify low-level driver of state change */ 2531 if (sp->pp_chg) 2532 sp->pp_chg(sp, (int)sp->pp_phase); 2533 2534 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2535 /* if no NCP is starting, close down */ 2536 sppp_lcp_check_and_close(sp); 2537 } 2538 2539 static void 2540 sppp_lcp_tld(struct sppp *sp) 2541 { 2542 STDDCL; 2543 int i; 2544 u_int32_t mask; 2545 2546 sp->pp_phase = SPPP_PHASE_TERMINATE; 2547 2548 if(debug) 2549 { 2550 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2551 sppp_phase_name(sp->pp_phase)); 2552 } 2553 2554 /* 2555 * Take upper layers down. We send the Down event first and 2556 * the Close second to prevent the upper layers from sending 2557 * ``a flurry of terminate-request packets'', as the RFC 2558 * describes it. 2559 */ 2560 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2561 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2562 (cps[i])->Down(sp); 2563 (cps[i])->Close(sp); 2564 } 2565 } 2566 2567 static void 2568 sppp_lcp_tls(struct sppp *sp) 2569 { 2570 STDDCL; 2571 2572 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2573 printf("%s: authentication failed %d times, not retrying again\n", 2574 sp->pp_if.if_xname, sp->pp_auth_failures); 2575 if_down(&sp->pp_if); 2576 return; 2577 } 2578 2579 sp->pp_phase = SPPP_PHASE_ESTABLISH; 2580 2581 if(debug) 2582 { 2583 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2584 sppp_phase_name(sp->pp_phase)); 2585 } 2586 2587 /* Notify lower layer if desired. */ 2588 if (sp->pp_tls) 2589 (sp->pp_tls)(sp); 2590 } 2591 2592 static void 2593 sppp_lcp_tlf(struct sppp *sp) 2594 { 2595 STDDCL; 2596 2597 sp->pp_phase = SPPP_PHASE_DEAD; 2598 2599 if(debug) 2600 { 2601 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2602 sppp_phase_name(sp->pp_phase)); 2603 } 2604 2605 /* Notify lower layer if desired. */ 2606 if (sp->pp_tlf) 2607 (sp->pp_tlf)(sp); 2608 } 2609 2610 static void 2611 sppp_lcp_scr(struct sppp *sp) 2612 { 2613 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2614 int i = 0; 2615 u_short authproto; 2616 2617 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2618 if (! sp->lcp.magic) 2619 sp->lcp.magic = random(); 2620 opt[i++] = LCP_OPT_MAGIC; 2621 opt[i++] = 6; 2622 opt[i++] = sp->lcp.magic >> 24; 2623 opt[i++] = sp->lcp.magic >> 16; 2624 opt[i++] = sp->lcp.magic >> 8; 2625 opt[i++] = sp->lcp.magic; 2626 } 2627 2628 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2629 opt[i++] = LCP_OPT_MRU; 2630 opt[i++] = 4; 2631 opt[i++] = sp->lcp.mru >> 8; 2632 opt[i++] = sp->lcp.mru; 2633 } 2634 2635 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2636 authproto = sp->hisauth.proto; 2637 opt[i++] = LCP_OPT_AUTH_PROTO; 2638 opt[i++] = authproto == PPP_CHAP? 5: 4; 2639 opt[i++] = authproto >> 8; 2640 opt[i++] = authproto; 2641 if (authproto == PPP_CHAP) 2642 opt[i++] = CHAP_MD5; 2643 } 2644 2645 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2646 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2647 } 2648 2649 /* 2650 * Check the open NCPs, return true if at least one NCP is open. 2651 */ 2652 static int 2653 sppp_ncp_check(struct sppp *sp) 2654 { 2655 int i, mask; 2656 2657 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2658 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2659 return 1; 2660 return 0; 2661 } 2662 2663 /* 2664 * Re-check the open NCPs and see if we should terminate the link. 2665 * Called by the NCPs during their tlf action handling. 2666 */ 2667 static void 2668 sppp_lcp_check_and_close(struct sppp *sp) 2669 { 2670 2671 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2672 /* don't bother, we are already going down */ 2673 return; 2674 2675 if (sppp_ncp_check(sp)) 2676 return; 2677 2678 lcp.Close(sp); 2679 } 2680 2681 2682 /* 2683 *--------------------------------------------------------------------------* 2684 * * 2685 * The IPCP implementation. * 2686 * * 2687 *--------------------------------------------------------------------------* 2688 */ 2689 2690 static void 2691 sppp_ipcp_init(struct sppp *sp) 2692 { 2693 sp->ipcp.opts = 0; 2694 sp->ipcp.flags = 0; 2695 sp->state[IDX_IPCP] = STATE_INITIAL; 2696 sp->fail_counter[IDX_IPCP] = 0; 2697 sp->pp_seq[IDX_IPCP] = 0; 2698 sp->pp_rseq[IDX_IPCP] = 0; 2699 callout_init(&sp->ch[IDX_IPCP]); 2700 } 2701 2702 static void 2703 sppp_ipcp_up(struct sppp *sp) 2704 { 2705 sppp_up_event(&ipcp, sp); 2706 } 2707 2708 static void 2709 sppp_ipcp_down(struct sppp *sp) 2710 { 2711 sppp_down_event(&ipcp, sp); 2712 } 2713 2714 static void 2715 sppp_ipcp_open(struct sppp *sp) 2716 { 2717 STDDCL; 2718 u_int32_t myaddr, hisaddr; 2719 2720 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 2721 sp->ipcp.req_myaddr = 0; 2722 sp->ipcp.req_hisaddr = 0; 2723 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 2724 2725 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 2726 /* 2727 * If we don't have his address, this probably means our 2728 * interface doesn't want to talk IP at all. (This could 2729 * be the case if somebody wants to speak only IPX, for 2730 * example.) Don't open IPCP in this case. 2731 */ 2732 if (hisaddr == 0L) { 2733 /* XXX this message should go away */ 2734 if (debug) 2735 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n", 2736 SPP_ARGS(ifp)); 2737 return; 2738 } 2739 2740 if (myaddr == 0) { 2741 /* 2742 * I don't have an assigned address, so i need to 2743 * negotiate my address. 2744 */ 2745 sp->ipcp.flags |= IPCP_MYADDR_DYN; 2746 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 2747 } 2748 if (hisaddr == 1) { 2749 /* 2750 * XXX - remove this hack! 2751 * remote has no valid adress, we need to get one assigned. 2752 */ 2753 sp->ipcp.flags |= IPCP_HISADDR_DYN; 2754 } 2755 sppp_open_event(&ipcp, sp); 2756 } 2757 2758 static void 2759 sppp_ipcp_close(struct sppp *sp) 2760 { 2761 sppp_close_event(&ipcp, sp); 2762 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 2763 /* 2764 * Some address was dynamic, clear it again. 2765 */ 2766 sppp_clear_ip_addrs(sp); 2767 } 2768 2769 static void 2770 sppp_ipcp_TO(void *cookie) 2771 { 2772 sppp_to_event(&ipcp, (struct sppp *)cookie); 2773 } 2774 2775 /* 2776 * Analyze a configure request. Return true if it was agreeable, and 2777 * caused action sca, false if it has been rejected or nak'ed, and 2778 * caused action scn. (The return value is used to make the state 2779 * transition decision in the state automaton.) 2780 */ 2781 static int 2782 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2783 { 2784 u_char *buf, *r, *p; 2785 struct ifnet *ifp = &sp->pp_if; 2786 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 2787 u_int32_t hisaddr, desiredaddr; 2788 2789 len -= 4; 2790 origlen = len; 2791 /* 2792 * Make sure to allocate a buf that can at least hold a 2793 * conf-nak with an `address' option. We might need it below. 2794 */ 2795 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 2796 if (! buf) 2797 return (0); 2798 2799 /* pass 1: see if we can recognize them */ 2800 if (debug) 2801 log(LOG_DEBUG, SPP_FMT "ipcp parse opts:", 2802 SPP_ARGS(ifp)); 2803 p = (void*) (h+1); 2804 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2805 if (debug) 2806 addlog(" %s", sppp_ipcp_opt_name(*p)); 2807 switch (*p) { 2808 #ifdef notyet 2809 case IPCP_OPT_COMPRESSION: 2810 if (len >= 6 && p[1] >= 6) { 2811 /* correctly formed compress option */ 2812 continue; 2813 } 2814 if (debug) 2815 addlog(" [invalid]"); 2816 break; 2817 #endif 2818 case IPCP_OPT_ADDRESS: 2819 if (len >= 6 && p[1] == 6) { 2820 /* correctly formed address option */ 2821 continue; 2822 } 2823 if (debug) 2824 addlog(" [invalid]"); 2825 break; 2826 default: 2827 /* Others not supported. */ 2828 if (debug) 2829 addlog(" [rej]"); 2830 break; 2831 } 2832 /* Add the option to rejected list. */ 2833 bcopy (p, r, p[1]); 2834 r += p[1]; 2835 rlen += p[1]; 2836 } 2837 if (rlen) { 2838 if (debug) 2839 addlog(" send conf-rej\n"); 2840 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 2841 goto end; 2842 } else if (debug) 2843 addlog("\n"); 2844 2845 /* pass 2: parse option values */ 2846 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 2847 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 2848 else 2849 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 2850 if (debug) 2851 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ", 2852 SPP_ARGS(ifp)); 2853 p = (void*) (h+1); 2854 len = origlen; 2855 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2856 if (debug) 2857 addlog(" %s", sppp_ipcp_opt_name(*p)); 2858 switch (*p) { 2859 #ifdef notyet 2860 case IPCP_OPT_COMPRESSION: 2861 continue; 2862 #endif 2863 case IPCP_OPT_ADDRESS: 2864 desiredaddr = p[2] << 24 | p[3] << 16 | 2865 p[4] << 8 | p[5]; 2866 if (desiredaddr == hisaddr || 2867 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 2868 /* 2869 * Peer's address is same as our value, 2870 * this is agreeable. Gonna conf-ack 2871 * it. 2872 */ 2873 if (debug) 2874 addlog(" %s [ack]", 2875 sppp_dotted_quad(hisaddr)); 2876 /* record that we've seen it already */ 2877 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 2878 sp->ipcp.req_hisaddr = desiredaddr; 2879 hisaddr = desiredaddr; 2880 continue; 2881 } 2882 /* 2883 * The address wasn't agreeable. This is either 2884 * he sent us 0.0.0.0, asking to assign him an 2885 * address, or he send us another address not 2886 * matching our value. Either case, we gonna 2887 * conf-nak it with our value. 2888 */ 2889 if (debug) { 2890 if (desiredaddr == 0) 2891 addlog(" [addr requested]"); 2892 else 2893 addlog(" %s [not agreed]", 2894 sppp_dotted_quad(desiredaddr)); 2895 } 2896 2897 p[2] = hisaddr >> 24; 2898 p[3] = hisaddr >> 16; 2899 p[4] = hisaddr >> 8; 2900 p[5] = hisaddr; 2901 break; 2902 } 2903 /* Add the option to nak'ed list. */ 2904 bcopy (p, r, p[1]); 2905 r += p[1]; 2906 rlen += p[1]; 2907 } 2908 2909 /* 2910 * If we are about to conf-ack the request, but haven't seen 2911 * his address so far, gonna conf-nak it instead, with the 2912 * `address' option present and our idea of his address being 2913 * filled in there, to request negotiation of both addresses. 2914 * 2915 * XXX This can result in an endless req - nak loop if peer 2916 * doesn't want to send us his address. Q: What should we do 2917 * about it? XXX A: implement the max-failure counter. 2918 */ 2919 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 2920 buf[0] = IPCP_OPT_ADDRESS; 2921 buf[1] = 6; 2922 buf[2] = hisaddr >> 24; 2923 buf[3] = hisaddr >> 16; 2924 buf[4] = hisaddr >> 8; 2925 buf[5] = hisaddr; 2926 rlen = 6; 2927 if (debug) 2928 addlog(" still need hisaddr"); 2929 } 2930 2931 if (rlen) { 2932 if (debug) 2933 addlog(" send conf-nak\n"); 2934 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 2935 } else { 2936 if (debug) 2937 addlog(" send conf-ack\n"); 2938 sppp_cp_send (sp, PPP_IPCP, CONF_ACK, 2939 h->ident, origlen, h+1); 2940 } 2941 2942 end: 2943 free (buf, M_TEMP); 2944 return (rlen == 0); 2945 } 2946 2947 /* 2948 * Analyze the IPCP Configure-Reject option list, and adjust our 2949 * negotiation. 2950 */ 2951 static void 2952 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2953 { 2954 u_char *buf, *p; 2955 struct ifnet *ifp = &sp->pp_if; 2956 int debug = ifp->if_flags & IFF_DEBUG; 2957 2958 len -= 4; 2959 buf = malloc (len, M_TEMP, M_NOWAIT); 2960 if (!buf) 2961 return; 2962 2963 if (debug) 2964 log(LOG_DEBUG, SPP_FMT "ipcp rej opts:", 2965 SPP_ARGS(ifp)); 2966 2967 p = (void*) (h+1); 2968 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2969 if (debug) 2970 addlog(" %s", sppp_ipcp_opt_name(*p)); 2971 switch (*p) { 2972 case IPCP_OPT_ADDRESS: 2973 /* 2974 * Peer doesn't grok address option. This is 2975 * bad. XXX Should we better give up here? 2976 */ 2977 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 2978 break; 2979 #ifdef notyet 2980 case IPCP_OPT_COMPRESS: 2981 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 2982 break; 2983 #endif 2984 } 2985 } 2986 if (debug) 2987 addlog("\n"); 2988 free (buf, M_TEMP); 2989 return; 2990 } 2991 2992 /* 2993 * Analyze the IPCP Configure-NAK option list, and adjust our 2994 * negotiation. 2995 */ 2996 static void 2997 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2998 { 2999 u_char *p; 3000 struct ifnet *ifp = &sp->pp_if; 3001 int debug = ifp->if_flags & IFF_DEBUG; 3002 u_int32_t wantaddr; 3003 3004 len -= 4; 3005 3006 if (debug) 3007 log(LOG_DEBUG, SPP_FMT "ipcp nak opts:", 3008 SPP_ARGS(ifp)); 3009 3010 p = (void*) (h+1); 3011 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3012 if (debug) 3013 addlog(" %s", sppp_ipcp_opt_name(*p)); 3014 switch (*p) { 3015 case IPCP_OPT_ADDRESS: 3016 /* 3017 * Peer doesn't like our local IP address. See 3018 * if we can do something for him. We'll drop 3019 * him our address then. 3020 */ 3021 if (len >= 6 && p[1] == 6) { 3022 wantaddr = p[2] << 24 | p[3] << 16 | 3023 p[4] << 8 | p[5]; 3024 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3025 if (debug) 3026 addlog(" [wantaddr %s]", 3027 sppp_dotted_quad(wantaddr)); 3028 /* 3029 * When doing dynamic address assignment, 3030 * we accept his offer. Otherwise, we 3031 * ignore it and thus continue to negotiate 3032 * our already existing value. 3033 */ 3034 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3035 if (debug) 3036 addlog(" [agree]"); 3037 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3038 sp->ipcp.req_myaddr = wantaddr; 3039 } 3040 } 3041 break; 3042 3043 case IPCP_OPT_PRIMDNS: 3044 if (len >= 6 && p[1] == 6) { 3045 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3046 p[4] << 8 | p[5]; 3047 } 3048 break; 3049 3050 case IPCP_OPT_SECDNS: 3051 if (len >= 6 && p[1] == 6) { 3052 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3053 p[4] << 8 | p[5]; 3054 } 3055 break; 3056 #ifdef notyet 3057 case IPCP_OPT_COMPRESS: 3058 /* 3059 * Peer wants different compression parameters. 3060 */ 3061 break; 3062 #endif 3063 } 3064 } 3065 if (debug) 3066 addlog("\n"); 3067 return; 3068 } 3069 3070 static void 3071 sppp_ipcp_tlu(struct sppp *sp) 3072 { 3073 /* we are up. Set addresses and notify anyone interested */ 3074 u_int32_t myaddr, hisaddr; 3075 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3076 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 3077 myaddr = sp->ipcp.req_myaddr; 3078 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 3079 hisaddr = sp->ipcp.req_hisaddr; 3080 sppp_set_ip_addrs(sp, myaddr, hisaddr); 3081 if (sp->pp_con) 3082 sp->pp_con(sp); 3083 } 3084 3085 static void 3086 sppp_ipcp_tld(struct sppp *sp) 3087 { 3088 } 3089 3090 static void 3091 sppp_ipcp_tls(struct sppp *sp) 3092 { 3093 /* indicate to LCP that it must stay alive */ 3094 sp->lcp.protos |= (1 << IDX_IPCP); 3095 } 3096 3097 static void 3098 sppp_ipcp_tlf(struct sppp *sp) 3099 { 3100 /* we no longer need LCP */ 3101 sp->lcp.protos &= ~(1 << IDX_IPCP); 3102 } 3103 3104 static void 3105 sppp_ipcp_scr(struct sppp *sp) 3106 { 3107 char opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3108 u_int32_t ouraddr; 3109 int i = 0; 3110 3111 #ifdef notyet 3112 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3113 opt[i++] = IPCP_OPT_COMPRESSION; 3114 opt[i++] = 6; 3115 opt[i++] = 0; /* VJ header compression */ 3116 opt[i++] = 0x2d; /* VJ header compression */ 3117 opt[i++] = max_slot_id; 3118 opt[i++] = comp_slot_id; 3119 } 3120 #endif 3121 3122 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3123 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3124 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3125 else 3126 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3127 opt[i++] = IPCP_OPT_ADDRESS; 3128 opt[i++] = 6; 3129 opt[i++] = ouraddr >> 24; 3130 opt[i++] = ouraddr >> 16; 3131 opt[i++] = ouraddr >> 8; 3132 opt[i++] = ouraddr; 3133 } 3134 3135 if (sp->query_dns & 1) { 3136 opt[i++] = IPCP_OPT_PRIMDNS; 3137 opt[i++] = 6; 3138 opt[i++] = sp->dns_addrs[0] >> 24; 3139 opt[i++] = sp->dns_addrs[0] >> 16; 3140 opt[i++] = sp->dns_addrs[0] >> 8; 3141 opt[i++] = sp->dns_addrs[0]; 3142 } 3143 if (sp->query_dns & 2) { 3144 opt[i++] = IPCP_OPT_SECDNS; 3145 opt[i++] = 6; 3146 opt[i++] = sp->dns_addrs[1] >> 24; 3147 opt[i++] = sp->dns_addrs[1] >> 16; 3148 opt[i++] = sp->dns_addrs[1] >> 8; 3149 opt[i++] = sp->dns_addrs[1]; 3150 } 3151 3152 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3153 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3154 } 3155 3156 3157 /* 3158 *--------------------------------------------------------------------------* 3159 * * 3160 * The IPv6CP implementation. * 3161 * * 3162 *--------------------------------------------------------------------------* 3163 */ 3164 3165 #ifdef INET6 3166 static void 3167 sppp_ipv6cp_init(struct sppp *sp) 3168 { 3169 sp->ipv6cp.opts = 0; 3170 sp->ipv6cp.flags = 0; 3171 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3172 sp->fail_counter[IDX_IPV6CP] = 0; 3173 sp->pp_seq[IDX_IPV6CP] = 0; 3174 sp->pp_rseq[IDX_IPV6CP] = 0; 3175 callout_init(&sp->ch[IDX_IPV6CP]); 3176 } 3177 3178 static void 3179 sppp_ipv6cp_up(struct sppp *sp) 3180 { 3181 sppp_up_event(&ipv6cp, sp); 3182 } 3183 3184 static void 3185 sppp_ipv6cp_down(struct sppp *sp) 3186 { 3187 sppp_down_event(&ipv6cp, sp); 3188 } 3189 3190 static void 3191 sppp_ipv6cp_open(struct sppp *sp) 3192 { 3193 STDDCL; 3194 struct in6_addr myaddr, hisaddr; 3195 3196 #ifdef IPV6CP_MYIFID_DYN 3197 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3198 #else 3199 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3200 #endif 3201 3202 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3203 /* 3204 * If we don't have our address, this probably means our 3205 * interface doesn't want to talk IPv6 at all. (This could 3206 * be the case if somebody wants to speak only IPX, for 3207 * example.) Don't open IPv6CP in this case. 3208 */ 3209 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3210 /* XXX this message should go away */ 3211 if (debug) 3212 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n", 3213 SPP_ARGS(ifp)); 3214 return; 3215 } 3216 3217 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3218 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3219 sppp_open_event(&ipv6cp, sp); 3220 } 3221 3222 static void 3223 sppp_ipv6cp_close(struct sppp *sp) 3224 { 3225 sppp_close_event(&ipv6cp, sp); 3226 } 3227 3228 static void 3229 sppp_ipv6cp_TO(void *cookie) 3230 { 3231 sppp_to_event(&ipv6cp, (struct sppp *)cookie); 3232 } 3233 3234 /* 3235 * Analyze a configure request. Return true if it was agreeable, and 3236 * caused action sca, false if it has been rejected or nak'ed, and 3237 * caused action scn. (The return value is used to make the state 3238 * transition decision in the state automaton.) 3239 */ 3240 static int 3241 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3242 { 3243 u_char *buf, *r, *p; 3244 struct ifnet *ifp = &sp->pp_if; 3245 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3246 struct in6_addr myaddr, desiredaddr, suggestaddr; 3247 int ifidcount; 3248 int type; 3249 int collision, nohisaddr; 3250 3251 len -= 4; 3252 origlen = len; 3253 /* 3254 * Make sure to allocate a buf that can at least hold a 3255 * conf-nak with an `address' option. We might need it below. 3256 */ 3257 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 3258 if (! buf) 3259 return (0); 3260 3261 /* pass 1: see if we can recognize them */ 3262 if (debug) 3263 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:", 3264 SPP_ARGS(ifp)); 3265 p = (void*) (h+1); 3266 ifidcount = 0; 3267 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3268 if (debug) 3269 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3270 switch (*p) { 3271 case IPV6CP_OPT_IFID: 3272 if (len >= 10 && p[1] == 10 && ifidcount == 0) { 3273 /* correctly formed address option */ 3274 ifidcount++; 3275 continue; 3276 } 3277 if (debug) 3278 addlog(" [invalid]"); 3279 break; 3280 #ifdef notyet 3281 case IPV6CP_OPT_COMPRESSION: 3282 if (len >= 4 && p[1] >= 4) { 3283 /* correctly formed compress option */ 3284 continue; 3285 } 3286 if (debug) 3287 addlog(" [invalid]"); 3288 break; 3289 #endif 3290 default: 3291 /* Others not supported. */ 3292 if (debug) 3293 addlog(" [rej]"); 3294 break; 3295 } 3296 /* Add the option to rejected list. */ 3297 bcopy (p, r, p[1]); 3298 r += p[1]; 3299 rlen += p[1]; 3300 } 3301 if (rlen) { 3302 if (debug) 3303 addlog(" send conf-rej\n"); 3304 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3305 goto end; 3306 } else if (debug) 3307 addlog("\n"); 3308 3309 /* pass 2: parse option values */ 3310 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3311 if (debug) 3312 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ", 3313 SPP_ARGS(ifp)); 3314 p = (void*) (h+1); 3315 len = origlen; 3316 type = CONF_ACK; 3317 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3318 if (debug) 3319 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3320 switch (*p) { 3321 #ifdef notyet 3322 case IPV6CP_OPT_COMPRESSION: 3323 continue; 3324 #endif 3325 case IPV6CP_OPT_IFID: 3326 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3327 bcopy(&p[2], &desiredaddr.s6_addr[8], 8); 3328 collision = (memcmp(&desiredaddr.s6_addr[8], 3329 &myaddr.s6_addr[8], 8) == 0); 3330 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3331 3332 desiredaddr.s6_addr16[0] = htons(0xfe80); 3333 desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3334 3335 if (!collision && !nohisaddr) { 3336 /* no collision, hisaddr known - Conf-Ack */ 3337 type = CONF_ACK; 3338 3339 if (debug) { 3340 addlog(" %s [%s]", 3341 ip6_sprintf(&desiredaddr), 3342 sppp_cp_type_name(type)); 3343 } 3344 continue; 3345 } 3346 3347 memset(&suggestaddr, 0, sizeof(&suggestaddr)); 3348 if (collision && nohisaddr) { 3349 /* collision, hisaddr unknown - Conf-Rej */ 3350 type = CONF_REJ; 3351 memset(&p[2], 0, 8); 3352 } else { 3353 /* 3354 * - no collision, hisaddr unknown, or 3355 * - collision, hisaddr known 3356 * Conf-Nak, suggest hisaddr 3357 */ 3358 type = CONF_NAK; 3359 sppp_suggest_ip6_addr(sp, &suggestaddr); 3360 bcopy(&suggestaddr.s6_addr[8], &p[2], 8); 3361 } 3362 if (debug) 3363 addlog(" %s [%s]", ip6_sprintf(&desiredaddr), 3364 sppp_cp_type_name(type)); 3365 break; 3366 } 3367 /* Add the option to nak'ed list. */ 3368 bcopy (p, r, p[1]); 3369 r += p[1]; 3370 rlen += p[1]; 3371 } 3372 3373 if (rlen == 0 && type == CONF_ACK) { 3374 if (debug) 3375 addlog(" send %s\n", sppp_cp_type_name(type)); 3376 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1); 3377 } else { 3378 #ifdef notdef 3379 if (type == CONF_ACK) 3380 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3381 #endif 3382 3383 if (debug) { 3384 addlog(" send %s suggest %s\n", 3385 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr)); 3386 } 3387 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3388 } 3389 3390 end: 3391 free (buf, M_TEMP); 3392 return (rlen == 0); 3393 } 3394 3395 /* 3396 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3397 * negotiation. 3398 */ 3399 static void 3400 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3401 { 3402 u_char *buf, *p; 3403 struct ifnet *ifp = &sp->pp_if; 3404 int debug = ifp->if_flags & IFF_DEBUG; 3405 3406 len -= 4; 3407 buf = malloc (len, M_TEMP, M_NOWAIT); 3408 if (!buf) 3409 return; 3410 3411 if (debug) 3412 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:", 3413 SPP_ARGS(ifp)); 3414 3415 p = (void*) (h+1); 3416 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3417 if (debug) 3418 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3419 switch (*p) { 3420 case IPV6CP_OPT_IFID: 3421 /* 3422 * Peer doesn't grok address option. This is 3423 * bad. XXX Should we better give up here? 3424 */ 3425 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3426 break; 3427 #ifdef notyet 3428 case IPV6CP_OPT_COMPRESS: 3429 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3430 break; 3431 #endif 3432 } 3433 } 3434 if (debug) 3435 addlog("\n"); 3436 free (buf, M_TEMP); 3437 return; 3438 } 3439 3440 /* 3441 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3442 * negotiation. 3443 */ 3444 static void 3445 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3446 { 3447 u_char *buf, *p; 3448 struct ifnet *ifp = &sp->pp_if; 3449 int debug = ifp->if_flags & IFF_DEBUG; 3450 struct in6_addr suggestaddr; 3451 3452 len -= 4; 3453 buf = malloc (len, M_TEMP, M_NOWAIT); 3454 if (!buf) 3455 return; 3456 3457 if (debug) 3458 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:", 3459 SPP_ARGS(ifp)); 3460 3461 p = (void*) (h+1); 3462 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3463 if (debug) 3464 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3465 switch (*p) { 3466 case IPV6CP_OPT_IFID: 3467 /* 3468 * Peer doesn't like our local ifid. See 3469 * if we can do something for him. We'll drop 3470 * him our address then. 3471 */ 3472 if (len < 10 || p[1] != 10) 3473 break; 3474 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3475 suggestaddr.s6_addr16[0] = htons(0xfe80); 3476 suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3477 bcopy(&p[2], &suggestaddr.s6_addr[8], 8); 3478 3479 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3480 if (debug) 3481 addlog(" [suggestaddr %s]", 3482 ip6_sprintf(&suggestaddr)); 3483 #ifdef IPV6CP_MYIFID_DYN 3484 /* 3485 * When doing dynamic address assignment, 3486 * we accept his offer. 3487 */ 3488 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3489 struct in6_addr lastsuggest; 3490 /* 3491 * If <suggested myaddr from peer> equals to 3492 * <hisaddr we have suggested last time>, 3493 * we have a collision. generate new random 3494 * ifid. 3495 */ 3496 sppp_suggest_ip6_addr(&lastsuggest); 3497 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3498 lastsuggest)) { 3499 if (debug) 3500 addlog(" [random]"); 3501 sppp_gen_ip6_addr(sp, &suggestaddr); 3502 } 3503 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3504 if (debug) 3505 addlog(" [agree]"); 3506 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3507 } 3508 #else 3509 /* 3510 * Since we do not do dynamic address assignment, 3511 * we ignore it and thus continue to negotiate 3512 * our already existing value. This can possibly 3513 * go into infinite request-reject loop. 3514 * 3515 * This is not likely because we normally use 3516 * ifid based on MAC-address. 3517 * If you have no ethernet card on the node, too bad. 3518 * XXX should we use fail_counter? 3519 */ 3520 #endif 3521 break; 3522 #ifdef notyet 3523 case IPV6CP_OPT_COMPRESS: 3524 /* 3525 * Peer wants different compression parameters. 3526 */ 3527 break; 3528 #endif 3529 } 3530 } 3531 if (debug) 3532 addlog("\n"); 3533 free (buf, M_TEMP); 3534 return; 3535 } 3536 3537 static void 3538 sppp_ipv6cp_tlu(struct sppp *sp) 3539 { 3540 /* we are up - notify isdn daemon */ 3541 if (sp->pp_con) 3542 sp->pp_con(sp); 3543 } 3544 3545 static void 3546 sppp_ipv6cp_tld(struct sppp *sp) 3547 { 3548 } 3549 3550 static void 3551 sppp_ipv6cp_tls(struct sppp *sp) 3552 { 3553 /* indicate to LCP that it must stay alive */ 3554 sp->lcp.protos |= (1 << IDX_IPV6CP); 3555 } 3556 3557 static void 3558 sppp_ipv6cp_tlf(struct sppp *sp) 3559 { 3560 /* we no longer need LCP */ 3561 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3562 } 3563 3564 static void 3565 sppp_ipv6cp_scr(struct sppp *sp) 3566 { 3567 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3568 struct in6_addr ouraddr; 3569 int i = 0; 3570 3571 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3572 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3573 opt[i++] = IPV6CP_OPT_IFID; 3574 opt[i++] = 10; 3575 bcopy(&ouraddr.s6_addr[8], &opt[i], 8); 3576 i += 8; 3577 } 3578 3579 #ifdef notyet 3580 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 3581 opt[i++] = IPV6CP_OPT_COMPRESSION; 3582 opt[i++] = 4; 3583 opt[i++] = 0; /* TBD */ 3584 opt[i++] = 0; /* TBD */ 3585 /* variable length data may follow */ 3586 } 3587 #endif 3588 3589 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 3590 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 3591 } 3592 #else /*INET6*/ 3593 static void sppp_ipv6cp_init(struct sppp *sp) 3594 { 3595 } 3596 3597 static void sppp_ipv6cp_up(struct sppp *sp) 3598 { 3599 } 3600 3601 static void sppp_ipv6cp_down(struct sppp *sp) 3602 { 3603 } 3604 3605 3606 static void sppp_ipv6cp_open(struct sppp *sp) 3607 { 3608 } 3609 3610 static void sppp_ipv6cp_close(struct sppp *sp) 3611 { 3612 } 3613 3614 static void sppp_ipv6cp_TO(void *sp) 3615 { 3616 } 3617 3618 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3619 { 3620 return 0; 3621 } 3622 3623 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3624 { 3625 } 3626 3627 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3628 { 3629 } 3630 3631 static void sppp_ipv6cp_tlu(struct sppp *sp) 3632 { 3633 } 3634 3635 static void sppp_ipv6cp_tld(struct sppp *sp) 3636 { 3637 } 3638 3639 static void sppp_ipv6cp_tls(struct sppp *sp) 3640 { 3641 } 3642 3643 static void sppp_ipv6cp_tlf(struct sppp *sp) 3644 { 3645 } 3646 3647 static void sppp_ipv6cp_scr(struct sppp *sp) 3648 { 3649 } 3650 #endif /*INET6*/ 3651 3652 3653 /* 3654 *--------------------------------------------------------------------------* 3655 * * 3656 * The CHAP implementation. * 3657 * * 3658 *--------------------------------------------------------------------------* 3659 */ 3660 3661 /* 3662 * The authentication protocols don't employ a full-fledged state machine as 3663 * the control protocols do, since they do have Open and Close events, but 3664 * not Up and Down, nor are they explicitly terminated. Also, use of the 3665 * authentication protocols may be different in both directions (this makes 3666 * sense, think of a machine that never accepts incoming calls but only 3667 * calls out, it doesn't require the called party to authenticate itself). 3668 * 3669 * Our state machine for the local authentication protocol (we are requesting 3670 * the peer to authenticate) looks like: 3671 * 3672 * RCA- 3673 * +--------------------------------------------+ 3674 * V scn,tld| 3675 * +--------+ Close +---------+ RCA+ 3676 * | |<----------------------------------| |------+ 3677 * +--->| Closed | TO* | Opened | sca | 3678 * | | |-----+ +-------| |<-----+ 3679 * | +--------+ irc | | +---------+ 3680 * | ^ | | ^ 3681 * | | | | | 3682 * | | | | | 3683 * | TO-| | | | 3684 * | |tld TO+ V | | 3685 * | | +------->+ | | 3686 * | | | | | | 3687 * | +--------+ V | | 3688 * | | |<----+<--------------------+ | 3689 * | | Req- | scr | 3690 * | | Sent | | 3691 * | | | | 3692 * | +--------+ | 3693 * | RCA- | | RCA+ | 3694 * +------+ +------------------------------------------+ 3695 * scn,tld sca,irc,ict,tlu 3696 * 3697 * 3698 * with: 3699 * 3700 * Open: LCP reached authentication phase 3701 * Close: LCP reached terminate phase 3702 * 3703 * RCA+: received reply (pap-req, chap-response), acceptable 3704 * RCN: received reply (pap-req, chap-response), not acceptable 3705 * TO+: timeout with restart counter >= 0 3706 * TO-: timeout with restart counter < 0 3707 * TO*: reschedule timeout for CHAP 3708 * 3709 * scr: send request packet (none for PAP, chap-challenge) 3710 * sca: send ack packet (pap-ack, chap-success) 3711 * scn: send nak packet (pap-nak, chap-failure) 3712 * ict: initialize re-challenge timer (CHAP only) 3713 * 3714 * tlu: this-layer-up, LCP reaches network phase 3715 * tld: this-layer-down, LCP enters terminate phase 3716 * 3717 * Note that in CHAP mode, after sending a new challenge, while the state 3718 * automaton falls back into Req-Sent state, it doesn't signal a tld 3719 * event to LCP, so LCP remains in network phase. Only after not getting 3720 * any response (or after getting an unacceptable response), CHAP closes, 3721 * causing LCP to enter terminate phase. 3722 * 3723 * With PAP, there is no initial request that can be sent. The peer is 3724 * expected to send one based on the successful negotiation of PAP as 3725 * the authentication protocol during the LCP option negotiation. 3726 * 3727 * Incoming authentication protocol requests (remote requests 3728 * authentication, we are peer) don't employ a state machine at all, 3729 * they are simply answered. Some peers [Ascend P50 firmware rev 3730 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 3731 * still in authentication phase (thereby violating the standard that 3732 * demands that these NCP packets are to be discarded), so we keep 3733 * track of the peer demanding us to authenticate, and only proceed to 3734 * phase network once we've seen a positive acknowledge for the 3735 * authentication. 3736 */ 3737 3738 /* 3739 * Handle incoming CHAP packets. 3740 */ 3741 void 3742 sppp_chap_input(struct sppp *sp, struct mbuf *m) 3743 { 3744 STDDCL; 3745 struct lcp_header *h; 3746 int len, x; 3747 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 3748 int value_len, name_len; 3749 MD5_CTX ctx; 3750 3751 len = m->m_pkthdr.len; 3752 if (len < 4) { 3753 if (debug) 3754 log(LOG_DEBUG, 3755 SPP_FMT "chap invalid packet length: %d bytes\n", 3756 SPP_ARGS(ifp), len); 3757 return; 3758 } 3759 h = mtod (m, struct lcp_header*); 3760 if (len > ntohs (h->len)) 3761 len = ntohs (h->len); 3762 3763 switch (h->type) { 3764 /* challenge, failure and success are his authproto */ 3765 case CHAP_CHALLENGE: 3766 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 3767 /* can't do anything usefull */ 3768 sp->pp_auth_failures++; 3769 printf(SPP_FMT "chap input without my name and my secret being set\n", 3770 SPP_ARGS(ifp)); 3771 break; 3772 } 3773 value = 1 + (u_char*)(h+1); 3774 value_len = value[-1]; 3775 name = value + value_len; 3776 name_len = len - value_len - 5; 3777 if (name_len < 0) { 3778 if (debug) { 3779 log(LOG_DEBUG, 3780 SPP_FMT "chap corrupted challenge " 3781 "<%s id=0x%x len=%d", 3782 SPP_ARGS(ifp), 3783 sppp_auth_type_name(PPP_CHAP, h->type), 3784 h->ident, ntohs(h->len)); 3785 if (len > 4) 3786 sppp_print_bytes((u_char*) (h+1), len-4); 3787 addlog(">\n"); 3788 } 3789 break; 3790 } 3791 3792 if (debug) { 3793 log(LOG_DEBUG, 3794 SPP_FMT "chap input <%s id=0x%x len=%d name=", 3795 SPP_ARGS(ifp), 3796 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 3797 ntohs(h->len)); 3798 sppp_print_string((char*) name, name_len); 3799 addlog(" value-size=%d value=", value_len); 3800 sppp_print_bytes(value, value_len); 3801 addlog(">\n"); 3802 } 3803 3804 /* Compute reply value. */ 3805 MD5Init(&ctx); 3806 MD5Update(&ctx, &h->ident, 1); 3807 MD5Update(&ctx, sp->myauth.secret, strlen(sp->myauth.secret)); 3808 MD5Update(&ctx, value, value_len); 3809 MD5Final(digest, &ctx); 3810 dsize = sizeof digest; 3811 3812 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 3813 sizeof dsize, (const char *)&dsize, 3814 sizeof digest, digest, 3815 strlen(sp->myauth.name), 3816 sp->myauth.name, 3817 0); 3818 break; 3819 3820 case CHAP_SUCCESS: 3821 if (debug) { 3822 log(LOG_DEBUG, SPP_FMT "chap success", 3823 SPP_ARGS(ifp)); 3824 if (len > 4) { 3825 addlog(": "); 3826 sppp_print_string((char*)(h + 1), len - 4); 3827 } 3828 addlog("\n"); 3829 } 3830 x = splnet(); 3831 sp->pp_auth_failures = 0; 3832 sp->pp_flags &= ~PP_NEEDAUTH; 3833 if (sp->myauth.proto == PPP_CHAP && 3834 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 3835 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 3836 /* 3837 * We are authenticator for CHAP but didn't 3838 * complete yet. Leave it to tlu to proceed 3839 * to network phase. 3840 */ 3841 splx(x); 3842 break; 3843 } 3844 splx(x); 3845 sppp_phase_network(sp); 3846 break; 3847 3848 case CHAP_FAILURE: 3849 x = splnet(); 3850 sp->pp_auth_failures++; 3851 splx(x); 3852 if (debug) { 3853 log(LOG_INFO, SPP_FMT "chap failure", 3854 SPP_ARGS(ifp)); 3855 if (len > 4) { 3856 addlog(": "); 3857 sppp_print_string((char*)(h + 1), len - 4); 3858 } 3859 addlog("\n"); 3860 } else 3861 log(LOG_INFO, SPP_FMT "chap failure\n", 3862 SPP_ARGS(ifp)); 3863 /* await LCP shutdown by authenticator */ 3864 break; 3865 3866 /* response is my authproto */ 3867 case CHAP_RESPONSE: 3868 if (sp->hisauth.secret == NULL) { 3869 /* can't do anything usefull */ 3870 printf(SPP_FMT "chap input without his secret being set\n", 3871 SPP_ARGS(ifp)); 3872 break; 3873 } 3874 value = 1 + (u_char*)(h+1); 3875 value_len = value[-1]; 3876 name = value + value_len; 3877 name_len = len - value_len - 5; 3878 if (name_len < 0) { 3879 if (debug) { 3880 log(LOG_DEBUG, 3881 SPP_FMT "chap corrupted response " 3882 "<%s id=0x%x len=%d", 3883 SPP_ARGS(ifp), 3884 sppp_auth_type_name(PPP_CHAP, h->type), 3885 h->ident, ntohs(h->len)); 3886 if (len > 4) 3887 sppp_print_bytes((u_char*)(h+1), len-4); 3888 addlog(">\n"); 3889 } 3890 break; 3891 } 3892 if (h->ident != sp->confid[IDX_CHAP]) { 3893 if (debug) 3894 log(LOG_DEBUG, 3895 SPP_FMT "chap dropping response for old ID " 3896 "(got %d, expected %d)\n", 3897 SPP_ARGS(ifp), 3898 h->ident, sp->confid[IDX_CHAP]); 3899 break; 3900 } 3901 if (sp->hisauth.name != NULL && 3902 (name_len != strlen(sp->hisauth.name) 3903 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 3904 log(LOG_INFO, SPP_FMT "chap response, his name ", 3905 SPP_ARGS(ifp)); 3906 sppp_print_string(name, name_len); 3907 addlog(" != expected "); 3908 sppp_print_string(sp->hisauth.name, 3909 strlen(sp->hisauth.name)); 3910 addlog("\n"); 3911 goto chap_failure; 3912 } 3913 if (debug) { 3914 log(LOG_DEBUG, SPP_FMT "chap input(%s) " 3915 "<%s id=0x%x len=%d name=", 3916 SPP_ARGS(ifp), 3917 sppp_state_name(sp->state[IDX_CHAP]), 3918 sppp_auth_type_name(PPP_CHAP, h->type), 3919 h->ident, ntohs (h->len)); 3920 sppp_print_string((char*)name, name_len); 3921 addlog(" value-size=%d value=", value_len); 3922 sppp_print_bytes(value, value_len); 3923 addlog(">\n"); 3924 } 3925 if (value_len != sizeof(sp->myauth.challenge)) { 3926 if (debug) 3927 log(LOG_DEBUG, 3928 SPP_FMT "chap bad hash value length: " 3929 "%d bytes, should be %ld\n", 3930 SPP_ARGS(ifp), value_len, 3931 (long) sizeof(sp->myauth.challenge)); 3932 goto chap_failure; 3933 } 3934 3935 MD5Init(&ctx); 3936 MD5Update(&ctx, &h->ident, 1); 3937 MD5Update(&ctx, sp->hisauth.secret, 3938 strlen(sp->hisauth.secret)); 3939 MD5Update(&ctx, sp->myauth.challenge, sizeof(sp->myauth.challenge)); 3940 MD5Final(digest, &ctx); 3941 3942 #define FAILMSG "Failed..." 3943 #define SUCCMSG "Welcome!" 3944 3945 if (value_len != sizeof digest || 3946 memcmp(digest, value, value_len) != 0) { 3947 chap_failure: 3948 /* action scn, tld */ 3949 x = splnet(); 3950 sp->pp_auth_failures++; 3951 splx(x); 3952 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 3953 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 3954 0); 3955 chap.tld(sp); 3956 break; 3957 } 3958 sp->pp_auth_failures = 0; 3959 /* action sca, perhaps tlu */ 3960 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 3961 sp->state[IDX_CHAP] == STATE_OPENED) 3962 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 3963 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 3964 0); 3965 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 3966 sppp_cp_change_state(&chap, sp, STATE_OPENED); 3967 chap.tlu(sp); 3968 } 3969 break; 3970 3971 default: 3972 /* Unknown CHAP packet type -- ignore. */ 3973 if (debug) { 3974 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) " 3975 "<0x%x id=0x%xh len=%d", 3976 SPP_ARGS(ifp), 3977 sppp_state_name(sp->state[IDX_CHAP]), 3978 h->type, h->ident, ntohs(h->len)); 3979 if (len > 4) 3980 sppp_print_bytes((u_char*)(h+1), len-4); 3981 addlog(">\n"); 3982 } 3983 break; 3984 3985 } 3986 } 3987 3988 static void 3989 sppp_chap_init(struct sppp *sp) 3990 { 3991 /* Chap doesn't have STATE_INITIAL at all. */ 3992 sp->state[IDX_CHAP] = STATE_CLOSED; 3993 sp->fail_counter[IDX_CHAP] = 0; 3994 sp->pp_seq[IDX_CHAP] = 0; 3995 sp->pp_rseq[IDX_CHAP] = 0; 3996 callout_init(&sp->ch[IDX_CHAP]); 3997 } 3998 3999 static void 4000 sppp_chap_open(struct sppp *sp) 4001 { 4002 if (sp->myauth.proto == PPP_CHAP && 4003 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4004 /* we are authenticator for CHAP, start it */ 4005 chap.scr(sp); 4006 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4007 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4008 } 4009 /* nothing to be done if we are peer, await a challenge */ 4010 } 4011 4012 static void 4013 sppp_chap_close(struct sppp *sp) 4014 { 4015 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4016 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4017 } 4018 4019 static void 4020 sppp_chap_TO(void *cookie) 4021 { 4022 struct sppp *sp = (struct sppp *)cookie; 4023 STDDCL; 4024 int s; 4025 4026 s = splnet(); 4027 if (debug) 4028 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n", 4029 SPP_ARGS(ifp), 4030 sppp_state_name(sp->state[IDX_CHAP]), 4031 sp->rst_counter[IDX_CHAP]); 4032 4033 if (--sp->rst_counter[IDX_CHAP] < 0) 4034 /* TO- event */ 4035 switch (sp->state[IDX_CHAP]) { 4036 case STATE_REQ_SENT: 4037 chap.tld(sp); 4038 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4039 break; 4040 } 4041 else 4042 /* TO+ (or TO*) event */ 4043 switch (sp->state[IDX_CHAP]) { 4044 case STATE_OPENED: 4045 /* TO* event */ 4046 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4047 /* fall through */ 4048 case STATE_REQ_SENT: 4049 chap.scr(sp); 4050 /* sppp_cp_change_state() will restart the timer */ 4051 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4052 break; 4053 } 4054 4055 splx(s); 4056 } 4057 4058 static void 4059 sppp_chap_tlu(struct sppp *sp) 4060 { 4061 STDDCL; 4062 int i, x; 4063 4064 i = 0; 4065 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4066 4067 /* 4068 * Some broken CHAP implementations (Conware CoNet, firmware 4069 * 4.0.?) don't want to re-authenticate their CHAP once the 4070 * initial challenge-response exchange has taken place. 4071 * Provide for an option to avoid rechallenges. 4072 */ 4073 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4074 /* 4075 * Compute the re-challenge timeout. This will yield 4076 * a number between 300 and 810 seconds. 4077 */ 4078 i = 300 + ((unsigned)(random() & 0xff00) >> 7); 4079 4080 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4081 } 4082 4083 if (debug) { 4084 log(LOG_DEBUG, 4085 SPP_FMT "chap %s, ", 4086 SPP_ARGS(ifp), 4087 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu"); 4088 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) 4089 addlog("next re-challenge in %d seconds\n", i); 4090 else 4091 addlog("re-challenging supressed\n"); 4092 } 4093 4094 x = splnet(); 4095 sp->pp_auth_failures = 0; 4096 /* indicate to LCP that we need to be closed down */ 4097 sp->lcp.protos |= (1 << IDX_CHAP); 4098 4099 if (sp->pp_flags & PP_NEEDAUTH) { 4100 /* 4101 * Remote is authenticator, but his auth proto didn't 4102 * complete yet. Defer the transition to network 4103 * phase. 4104 */ 4105 splx(x); 4106 return; 4107 } 4108 splx(x); 4109 4110 /* 4111 * If we are already in phase network, we are done here. This 4112 * is the case if this is a dummy tlu event after a re-challenge. 4113 */ 4114 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4115 sppp_phase_network(sp); 4116 } 4117 4118 static void 4119 sppp_chap_tld(struct sppp *sp) 4120 { 4121 STDDCL; 4122 4123 if (debug) 4124 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp)); 4125 callout_stop(&sp->ch[IDX_CHAP]); 4126 sp->lcp.protos &= ~(1 << IDX_CHAP); 4127 4128 lcp.Close(sp); 4129 } 4130 4131 static void 4132 sppp_chap_scr(struct sppp *sp) 4133 { 4134 struct timeval tv; 4135 u_int32_t *ch, seed; 4136 u_char clen; 4137 4138 if (sp->myauth.name == NULL) { 4139 /* can't do anything usefull */ 4140 printf(SPP_FMT "chap starting without my name being set\n", 4141 SPP_ARGS(&sp->pp_if)); 4142 return; 4143 } 4144 4145 /* Compute random challenge. */ 4146 ch = (u_int32_t *)sp->myauth.challenge; 4147 microtime(&tv); 4148 seed = tv.tv_sec ^ tv.tv_usec; 4149 ch[0] = seed ^ random(); 4150 ch[1] = seed ^ random(); 4151 ch[2] = seed ^ random(); 4152 ch[3] = seed ^ random(); 4153 clen = 16; /* 4 * sizeof(u_int32_t) */ 4154 4155 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4156 4157 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4158 sizeof clen, (const char *)&clen, 4159 sizeof(sp->myauth.challenge), sp->myauth.challenge, 4160 strlen(sp->myauth.name), 4161 sp->myauth.name, 4162 0); 4163 } 4164 4165 /* 4166 *--------------------------------------------------------------------------* 4167 * * 4168 * The PAP implementation. * 4169 * * 4170 *--------------------------------------------------------------------------* 4171 */ 4172 /* 4173 * For PAP, we need to keep a little state also if we are the peer, not the 4174 * authenticator. This is since we don't get a request to authenticate, but 4175 * have to repeatedly authenticate ourself until we got a response (or the 4176 * retry counter is expired). 4177 */ 4178 4179 /* 4180 * Handle incoming PAP packets. */ 4181 static void 4182 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4183 { 4184 STDDCL; 4185 struct lcp_header *h; 4186 int len, x; 4187 u_char mlen; 4188 char *name, *passwd; 4189 int name_len, passwd_len; 4190 4191 len = m->m_pkthdr.len; 4192 if (len < 5) { 4193 if (debug) 4194 log(LOG_DEBUG, 4195 SPP_FMT "pap invalid packet length: %d bytes\n", 4196 SPP_ARGS(ifp), len); 4197 return; 4198 } 4199 h = mtod (m, struct lcp_header*); 4200 if (len > ntohs (h->len)) 4201 len = ntohs (h->len); 4202 switch (h->type) { 4203 /* PAP request is my authproto */ 4204 case PAP_REQ: 4205 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4206 /* can't do anything usefull */ 4207 printf(SPP_FMT "pap request without his name and his secret being set\n", 4208 SPP_ARGS(ifp)); 4209 break; 4210 } 4211 name = 1 + (u_char*)(h+1); 4212 name_len = name[-1]; 4213 passwd = name + name_len + 1; 4214 if (name_len > len - 6 || 4215 (passwd_len = passwd[-1]) > len - 6 - name_len) { 4216 if (debug) { 4217 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4218 "<%s id=0x%x len=%d", 4219 SPP_ARGS(ifp), 4220 sppp_auth_type_name(PPP_PAP, h->type), 4221 h->ident, ntohs(h->len)); 4222 if (len > 4) 4223 sppp_print_bytes((u_char*)(h+1), len-4); 4224 addlog(">\n"); 4225 } 4226 break; 4227 } 4228 if (debug) { 4229 log(LOG_DEBUG, SPP_FMT "pap input(%s) " 4230 "<%s id=0x%x len=%d name=", 4231 SPP_ARGS(ifp), 4232 sppp_state_name(sp->state[IDX_PAP]), 4233 sppp_auth_type_name(PPP_PAP, h->type), 4234 h->ident, ntohs(h->len)); 4235 sppp_print_string((char*)name, name_len); 4236 addlog(" passwd="); 4237 sppp_print_string((char*)passwd, passwd_len); 4238 addlog(">\n"); 4239 } 4240 if (memcmp(name, sp->hisauth.name, name_len) != 0 || 4241 memcmp(passwd, sp->hisauth.secret, passwd_len) != 0) { 4242 /* action scn, tld */ 4243 sp->pp_auth_failures++; 4244 mlen = sizeof(FAILMSG) - 1; 4245 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4246 sizeof mlen, (const char *)&mlen, 4247 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 4248 0); 4249 pap.tld(sp); 4250 break; 4251 } 4252 /* action sca, perhaps tlu */ 4253 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4254 sp->state[IDX_PAP] == STATE_OPENED) { 4255 mlen = sizeof(SUCCMSG) - 1; 4256 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4257 sizeof mlen, (const char *)&mlen, 4258 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 4259 0); 4260 } 4261 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4262 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4263 pap.tlu(sp); 4264 } 4265 break; 4266 4267 /* ack and nak are his authproto */ 4268 case PAP_ACK: 4269 callout_stop(&sp->pap_my_to_ch); 4270 if (debug) { 4271 log(LOG_DEBUG, SPP_FMT "pap success", 4272 SPP_ARGS(ifp)); 4273 name_len = *(char *)h; 4274 if (len > 5 && name_len) { 4275 addlog(": "); 4276 sppp_print_string((char*)(h+1), name_len); 4277 } 4278 addlog("\n"); 4279 } 4280 x = splnet(); 4281 sp->pp_auth_failures = 0; 4282 sp->pp_flags &= ~PP_NEEDAUTH; 4283 if (sp->myauth.proto == PPP_PAP && 4284 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4285 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4286 /* 4287 * We are authenticator for PAP but didn't 4288 * complete yet. Leave it to tlu to proceed 4289 * to network phase. 4290 */ 4291 splx(x); 4292 break; 4293 } 4294 splx(x); 4295 sppp_phase_network(sp); 4296 break; 4297 4298 case PAP_NAK: 4299 callout_stop(&sp->pap_my_to_ch); 4300 sp->pp_auth_failures++; 4301 if (debug) { 4302 log(LOG_INFO, SPP_FMT "pap failure", 4303 SPP_ARGS(ifp)); 4304 name_len = *(char *)h; 4305 if (len > 5 && name_len) { 4306 addlog(": "); 4307 sppp_print_string((char*)(h+1), name_len); 4308 } 4309 addlog("\n"); 4310 } else 4311 log(LOG_INFO, SPP_FMT "pap failure\n", 4312 SPP_ARGS(ifp)); 4313 /* await LCP shutdown by authenticator */ 4314 break; 4315 4316 default: 4317 /* Unknown PAP packet type -- ignore. */ 4318 if (debug) { 4319 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4320 "<0x%x id=0x%x len=%d", 4321 SPP_ARGS(ifp), 4322 h->type, h->ident, ntohs(h->len)); 4323 if (len > 4) 4324 sppp_print_bytes((u_char*)(h+1), len-4); 4325 addlog(">\n"); 4326 } 4327 break; 4328 4329 } 4330 } 4331 4332 static void 4333 sppp_pap_init(struct sppp *sp) 4334 { 4335 /* PAP doesn't have STATE_INITIAL at all. */ 4336 sp->state[IDX_PAP] = STATE_CLOSED; 4337 sp->fail_counter[IDX_PAP] = 0; 4338 sp->pp_seq[IDX_PAP] = 0; 4339 sp->pp_rseq[IDX_PAP] = 0; 4340 callout_init(&sp->ch[IDX_PAP]); 4341 callout_init(&sp->pap_my_to_ch); 4342 } 4343 4344 static void 4345 sppp_pap_open(struct sppp *sp) 4346 { 4347 if (sp->hisauth.proto == PPP_PAP && 4348 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4349 /* we are authenticator for PAP, start our timer */ 4350 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4351 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4352 } 4353 if (sp->myauth.proto == PPP_PAP) { 4354 /* we are peer, send a request, and start a timer */ 4355 pap.scr(sp); 4356 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4357 sppp_pap_my_TO, sp); 4358 } 4359 } 4360 4361 static void 4362 sppp_pap_close(struct sppp *sp) 4363 { 4364 if (sp->state[IDX_PAP] != STATE_CLOSED) 4365 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4366 } 4367 4368 /* 4369 * That's the timeout routine if we are authenticator. Since the 4370 * authenticator is basically passive in PAP, we can't do much here. 4371 */ 4372 static void 4373 sppp_pap_TO(void *cookie) 4374 { 4375 struct sppp *sp = (struct sppp *)cookie; 4376 STDDCL; 4377 int s; 4378 4379 s = splnet(); 4380 if (debug) 4381 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n", 4382 SPP_ARGS(ifp), 4383 sppp_state_name(sp->state[IDX_PAP]), 4384 sp->rst_counter[IDX_PAP]); 4385 4386 if (--sp->rst_counter[IDX_PAP] < 0) 4387 /* TO- event */ 4388 switch (sp->state[IDX_PAP]) { 4389 case STATE_REQ_SENT: 4390 pap.tld(sp); 4391 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4392 break; 4393 } 4394 else 4395 /* TO+ event, not very much we could do */ 4396 switch (sp->state[IDX_PAP]) { 4397 case STATE_REQ_SENT: 4398 /* sppp_cp_change_state() will restart the timer */ 4399 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4400 break; 4401 } 4402 4403 splx(s); 4404 } 4405 4406 /* 4407 * That's the timeout handler if we are peer. Since the peer is active, 4408 * we need to retransmit our PAP request since it is apparently lost. 4409 * XXX We should impose a max counter. 4410 */ 4411 static void 4412 sppp_pap_my_TO(void *cookie) 4413 { 4414 struct sppp *sp = (struct sppp *)cookie; 4415 STDDCL; 4416 4417 if (debug) 4418 log(LOG_DEBUG, SPP_FMT "pap peer TO\n", 4419 SPP_ARGS(ifp)); 4420 4421 pap.scr(sp); 4422 } 4423 4424 static void 4425 sppp_pap_tlu(struct sppp *sp) 4426 { 4427 STDDCL; 4428 int x; 4429 4430 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4431 4432 if (debug) 4433 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 4434 SPP_ARGS(ifp), pap.name); 4435 4436 x = splnet(); 4437 sp->pp_auth_failures = 0; 4438 /* indicate to LCP that we need to be closed down */ 4439 sp->lcp.protos |= (1 << IDX_PAP); 4440 4441 if (sp->pp_flags & PP_NEEDAUTH) { 4442 /* 4443 * Remote is authenticator, but his auth proto didn't 4444 * complete yet. Defer the transition to network 4445 * phase. 4446 */ 4447 splx(x); 4448 return; 4449 } 4450 splx(x); 4451 sppp_phase_network(sp); 4452 } 4453 4454 static void 4455 sppp_pap_tld(struct sppp *sp) 4456 { 4457 STDDCL; 4458 4459 if (debug) 4460 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp)); 4461 callout_stop(&sp->ch[IDX_PAP]); 4462 callout_stop(&sp->pap_my_to_ch); 4463 sp->lcp.protos &= ~(1 << IDX_PAP); 4464 4465 lcp.Close(sp); 4466 } 4467 4468 static void 4469 sppp_pap_scr(struct sppp *sp) 4470 { 4471 u_char idlen, pwdlen; 4472 4473 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4474 /* can't do anything usefull */ 4475 printf(SPP_FMT "pap starting without my name and secret being set\n", 4476 SPP_ARGS(&sp->pp_if)); 4477 return; 4478 } 4479 4480 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4481 pwdlen = strlen(sp->myauth.secret); 4482 idlen = strlen(sp->myauth.name); 4483 4484 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 4485 sizeof idlen, (const char *)&idlen, 4486 idlen, sp->myauth.name, 4487 sizeof pwdlen, (const char *)&pwdlen, 4488 pwdlen, sp->myauth.secret, 4489 0); 4490 } 4491 4492 /* 4493 * Random miscellaneous functions. 4494 */ 4495 4496 /* 4497 * Send a PAP or CHAP proto packet. 4498 * 4499 * Varadic function, each of the elements for the ellipsis is of type 4500 * ``size_t mlen, const u_char *msg''. Processing will stop iff 4501 * mlen == 0. 4502 * NOTE: never declare variadic functions with types subject to type 4503 * promotion (i.e. u_char). This is asking for big trouble depending 4504 * on the architecture you are on... 4505 */ 4506 4507 static void 4508 sppp_auth_send(const struct cp *cp, struct sppp *sp, 4509 unsigned int type, unsigned int id, 4510 ...) 4511 { 4512 STDDCL; 4513 struct lcp_header *lh; 4514 struct mbuf *m; 4515 u_char *p; 4516 int len; 4517 size_t pkthdrlen; 4518 unsigned int mlen; 4519 const char *msg; 4520 va_list ap; 4521 4522 MGETHDR (m, M_DONTWAIT, MT_DATA); 4523 if (! m) 4524 return; 4525 m->m_pkthdr.rcvif = 0; 4526 4527 if (sp->pp_flags & PP_NOFRAMING) { 4528 *mtod(m, u_int16_t*) = htons(cp->proto); 4529 pkthdrlen = 2; 4530 lh = (struct lcp_header*)(mtod(m, u_int8_t*)+2); 4531 } else { 4532 struct ppp_header *h; 4533 h = mtod (m, struct ppp_header*); 4534 h->address = PPP_ALLSTATIONS; /* broadcast address */ 4535 h->control = PPP_UI; /* Unnumbered Info */ 4536 h->protocol = htons(cp->proto); 4537 pkthdrlen = PPP_HEADER_LEN; 4538 4539 lh = (struct lcp_header*)(h + 1); 4540 } 4541 4542 lh->type = type; 4543 lh->ident = id; 4544 p = (u_char*) (lh+1); 4545 4546 va_start(ap, id); 4547 len = 0; 4548 4549 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 4550 msg = va_arg(ap, const char *); 4551 len += mlen; 4552 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 4553 va_end(ap); 4554 m_freem(m); 4555 return; 4556 } 4557 4558 bcopy(msg, p, mlen); 4559 p += mlen; 4560 } 4561 va_end(ap); 4562 4563 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 4564 lh->len = htons (LCP_HEADER_LEN + len); 4565 4566 if (debug) { 4567 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 4568 SPP_ARGS(ifp), cp->name, 4569 sppp_auth_type_name(cp->proto, lh->type), 4570 lh->ident, ntohs(lh->len)); 4571 if (len) 4572 sppp_print_bytes((u_char*) (lh+1), len); 4573 addlog(">\n"); 4574 } 4575 if (IF_QFULL (&sp->pp_cpq)) { 4576 IF_DROP (&sp->pp_fastq); 4577 IF_DROP (&ifp->if_snd); 4578 m_freem (m); 4579 ++ifp->if_oerrors; 4580 } else 4581 IF_ENQUEUE (&sp->pp_cpq, m); 4582 if (! (ifp->if_flags & IFF_OACTIVE)) 4583 (*ifp->if_start) (ifp); 4584 ifp->if_obytes += m->m_pkthdr.len + 3; 4585 } 4586 4587 /* 4588 * Send keepalive packets, every 10 seconds. 4589 */ 4590 static void 4591 sppp_keepalive(void *dummy) 4592 { 4593 struct sppp *sp; 4594 int s; 4595 time_t now; 4596 4597 s = splnet(); 4598 now = time.tv_sec; 4599 for (sp=spppq; sp; sp=sp->pp_next) { 4600 struct ifnet *ifp = &sp->pp_if; 4601 4602 /* check idle timeout */ 4603 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 4604 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 4605 /* idle timeout is enabled for this interface */ 4606 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 4607 if (ifp->if_flags & IFF_DEBUG) 4608 printf("%s: no activitiy for %lu seconds\n", 4609 sp->pp_if.if_xname, 4610 (unsigned long)(now-sp->pp_last_activity)); 4611 lcp.Close(sp); 4612 continue; 4613 } 4614 } 4615 4616 /* Keepalive mode disabled or channel down? */ 4617 if (! (sp->pp_flags & PP_KEEPALIVE) || 4618 ! (ifp->if_flags & IFF_RUNNING)) 4619 continue; 4620 4621 /* No keepalive in PPP mode if LCP not opened yet. */ 4622 if (! (sp->pp_flags & PP_CISCO) && 4623 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) 4624 continue; 4625 4626 if (sp->pp_alivecnt == MAXALIVECNT) { 4627 /* No keepalive packets got. Stop the interface. */ 4628 if_down (ifp); 4629 IF_PURGE (&sp->pp_cpq); 4630 if (! (sp->pp_flags & PP_CISCO)) { 4631 printf("%s: LCP keepalive timed out, going to restart the connection\n", 4632 ifp->if_xname); 4633 sp->pp_alivecnt = 0; 4634 4635 /* we are down, close all open protocols */ 4636 lcp.Close(sp); 4637 4638 /* And now prepare LCP to reestablish the link, if configured to do so. */ 4639 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 4640 4641 /* Close connection imediatly, completition of this 4642 * will summon the magic needed to reestablish it. */ 4643 sp->pp_tlf(sp); 4644 continue; 4645 } 4646 } 4647 if (sp->pp_alivecnt <= MAXALIVECNT) 4648 ++sp->pp_alivecnt; 4649 if (sp->pp_flags & PP_CISCO) 4650 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ, 4651 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 4652 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 4653 int32_t nmagic = htonl (sp->lcp.magic); 4654 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 4655 sppp_cp_send (sp, PPP_LCP, ECHO_REQ, 4656 sp->lcp.echoid, 4, &nmagic); 4657 } 4658 } 4659 splx(s); 4660 callout_reset(&keepalive_ch, hz * 10, sppp_keepalive, NULL); 4661 } 4662 4663 /* 4664 * Get both IP addresses. 4665 */ 4666 static void 4667 sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, u_int32_t *srcmask) 4668 { 4669 struct ifnet *ifp = &sp->pp_if; 4670 struct ifaddr *ifa; 4671 struct sockaddr_in *si, *sm; 4672 u_int32_t ssrc, ddst; 4673 4674 sm = NULL; 4675 ssrc = ddst = 0; 4676 /* 4677 * Pick the first AF_INET address from the list, 4678 * aliases don't make any sense on a p2p link anyway. 4679 */ 4680 si = 0; 4681 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 4682 if (ifa->ifa_addr->sa_family == AF_INET) { 4683 si = (struct sockaddr_in *)ifa->ifa_addr; 4684 sm = (struct sockaddr_in *)ifa->ifa_netmask; 4685 if (si) 4686 break; 4687 } 4688 } 4689 if (ifa) { 4690 if (si && si->sin_addr.s_addr) { 4691 ssrc = si->sin_addr.s_addr; 4692 if (srcmask) 4693 *srcmask = ntohl(sm->sin_addr.s_addr); 4694 } 4695 4696 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 4697 if (si && si->sin_addr.s_addr) 4698 ddst = si->sin_addr.s_addr; 4699 } 4700 4701 if (dst) *dst = ntohl(ddst); 4702 if (src) *src = ntohl(ssrc); 4703 } 4704 4705 /* 4706 * Set IP addresses. Must be called at splnet. 4707 * If an address is 0, leave it the way it is. 4708 */ 4709 static void 4710 sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr) 4711 { 4712 STDDCL; 4713 struct ifaddr *ifa; 4714 struct sockaddr_in *si; 4715 struct sockaddr_in *dest; 4716 4717 /* 4718 * Pick the first AF_INET address from the list, 4719 * aliases don't make any sense on a p2p link anyway. 4720 */ 4721 4722 si = 0; 4723 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4724 { 4725 if (ifa->ifa_addr->sa_family == AF_INET) 4726 { 4727 si = (struct sockaddr_in *)ifa->ifa_addr; 4728 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4729 if (si) 4730 break; 4731 } 4732 } 4733 4734 if (ifa && si) 4735 { 4736 int error; 4737 struct sockaddr_in new_sin = *si; 4738 struct sockaddr_in new_dst = *dest; 4739 4740 /* 4741 * Scrub old routes now instead of calling in_ifinit with 4742 * scrub=1, because we may change the dstaddr 4743 * before the call to in_ifinit. 4744 */ 4745 in_ifscrub(ifp, ifatoia(ifa)); 4746 4747 if (myaddr != 0) 4748 new_sin.sin_addr.s_addr = htonl(myaddr); 4749 if (hisaddr != 0) { 4750 new_dst.sin_addr.s_addr = htonl(hisaddr); 4751 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) { 4752 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 4753 *dest = new_dst; /* fix dstaddr in place */ 4754 } 4755 } 4756 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4757 if(debug && error) 4758 { 4759 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addrs: in_ifinit " 4760 " failed, error=%d\n", SPP_ARGS(ifp), error); 4761 } 4762 } 4763 } 4764 4765 /* 4766 * Clear IP addresses. Must be called at splnet. 4767 */ 4768 static void 4769 sppp_clear_ip_addrs(struct sppp *sp) 4770 { 4771 struct ifnet *ifp = &sp->pp_if; 4772 struct ifaddr *ifa; 4773 struct sockaddr_in *si; 4774 struct sockaddr_in *dest; 4775 4776 u_int32_t remote; 4777 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4778 remote = sp->ipcp.saved_hisaddr; 4779 else 4780 sppp_get_ip_addrs(sp, 0, &remote, 0); 4781 4782 /* 4783 * Pick the first AF_INET address from the list, 4784 * aliases don't make any sense on a p2p link anyway. 4785 */ 4786 4787 si = 0; 4788 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4789 { 4790 if (ifa->ifa_addr->sa_family == AF_INET) 4791 { 4792 si = (struct sockaddr_in *)ifa->ifa_addr; 4793 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4794 if (si) 4795 break; 4796 } 4797 } 4798 4799 if (ifa && si) 4800 { 4801 struct sockaddr_in new_sin = *si; 4802 4803 in_ifscrub(ifp, ifatoia(ifa)); 4804 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 4805 new_sin.sin_addr.s_addr = 0; 4806 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4807 /* replace peer addr in place */ 4808 dest->sin_addr.s_addr = sp->ipcp.saved_hisaddr; 4809 in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4810 } 4811 } 4812 4813 #ifdef INET6 4814 /* 4815 * Get both IPv6 addresses. 4816 */ 4817 static void 4818 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 4819 struct in6_addr *srcmask) 4820 { 4821 struct ifnet *ifp = &sp->pp_if; 4822 struct ifaddr *ifa; 4823 struct sockaddr_in6 *si, *sm; 4824 struct in6_addr ssrc, ddst; 4825 4826 sm = NULL; 4827 memset(&ssrc, 0, sizeof(ssrc)); 4828 memset(&ddst, 0, sizeof(ddst)); 4829 /* 4830 * Pick the first link-local AF_INET6 address from the list, 4831 * aliases don't make any sense on a p2p link anyway. 4832 */ 4833 si = 0; 4834 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4835 if (ifa->ifa_addr->sa_family == AF_INET6) { 4836 si = (struct sockaddr_in6 *)ifa->ifa_addr; 4837 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 4838 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) 4839 break; 4840 } 4841 if (ifa) { 4842 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 4843 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc)); 4844 if (srcmask) { 4845 bcopy(&sm->sin6_addr, srcmask, 4846 sizeof(*srcmask)); 4847 } 4848 } 4849 4850 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 4851 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 4852 bcopy(&si->sin6_addr, &ddst, sizeof(ddst)); 4853 } 4854 4855 if (dst) 4856 bcopy(&ddst, dst, sizeof(*dst)); 4857 if (src) 4858 bcopy(&ssrc, src, sizeof(*src)); 4859 } 4860 4861 #ifdef IPV6CP_MYIFID_DYN 4862 /* 4863 * Generate random ifid. 4864 */ 4865 static void 4866 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 4867 { 4868 /* TBD */ 4869 } 4870 4871 /* 4872 * Set my IPv6 address. Must be called at splnet. 4873 */ 4874 static void 4875 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 4876 { 4877 STDDCL; 4878 struct ifaddr *ifa; 4879 struct sockaddr_in6 *sin6; 4880 4881 /* 4882 * Pick the first link-local AF_INET6 address from the list, 4883 * aliases don't make any sense on a p2p link anyway. 4884 */ 4885 4886 sin6 = NULL; 4887 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4888 { 4889 if (ifa->ifa_addr->sa_family == AF_INET6) 4890 { 4891 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 4892 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 4893 break; 4894 } 4895 } 4896 4897 if (ifa && sin6) 4898 { 4899 int error; 4900 struct sockaddr_in6 new_sin6 = *sin6; 4901 4902 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr)); 4903 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 4904 if (debug && error) 4905 { 4906 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit " 4907 " failed, error=%d\n", SPP_ARGS(ifp), error); 4908 } 4909 } 4910 } 4911 #endif 4912 4913 /* 4914 * Suggest a candidate address to be used by peer. 4915 */ 4916 static void 4917 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 4918 { 4919 struct in6_addr myaddr; 4920 struct timeval tv; 4921 4922 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4923 4924 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 4925 microtime(&tv); 4926 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 4927 myaddr.s6_addr[14] ^= 0xff; 4928 myaddr.s6_addr[15] ^= 0xff; 4929 } else { 4930 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 4931 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 4932 } 4933 if (suggest) 4934 bcopy(&myaddr, suggest, sizeof(myaddr)); 4935 } 4936 #endif /*INET6*/ 4937 4938 /* 4939 * Process ioctl requests specific to the PPP interface. 4940 * Permissions have already been checked. 4941 */ 4942 static int 4943 sppp_params(struct sppp *sp, int cmd, void *data) 4944 { 4945 switch (cmd) { 4946 case SPPPGETAUTHCFG: 4947 { 4948 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 4949 int error; 4950 size_t len; 4951 4952 cfg->myauthflags = sp->myauth.flags; 4953 cfg->hisauthflags = sp->hisauth.flags; 4954 strncpy(cfg->ifname, sp->pp_if.if_xname, IFNAMSIZ); 4955 cfg->hisauth = 0; 4956 if (sp->hisauth.proto) 4957 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4958 cfg->myauth = 0; 4959 if (sp->myauth.proto) 4960 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4961 if (cfg->myname_length == 0) { 4962 if (sp->myauth.name != NULL) 4963 cfg->myname_length = strlen(sp->myauth.name)+1; 4964 } else { 4965 if (sp->myauth.name == NULL) { 4966 cfg->myname_length = 0; 4967 } else { 4968 len = strlen(sp->myauth.name)+1; 4969 if (cfg->myname_length < len) 4970 return (ENAMETOOLONG); 4971 error = copyout(sp->myauth.name, cfg->myname, len); 4972 if (error) return error; 4973 } 4974 } 4975 if (cfg->hisname_length == 0) { 4976 if(sp->hisauth.name != NULL) 4977 cfg->hisname_length = strlen(sp->hisauth.name)+1; 4978 } else { 4979 if (sp->hisauth.name == NULL) { 4980 cfg->hisname_length = 0; 4981 } else { 4982 len = strlen(sp->hisauth.name)+1; 4983 if (cfg->hisname_length < len) 4984 return (ENAMETOOLONG); 4985 error = copyout(sp->hisauth.name, cfg->hisname, len); 4986 if (error) return error; 4987 } 4988 } 4989 } 4990 break; 4991 case SPPPSETAUTHCFG: 4992 { 4993 struct spppauthcfg *cfg = (struct spppauthcfg*)data; 4994 int error; 4995 4996 if (sp->myauth.name) { 4997 free(sp->myauth.name, M_DEVBUF); 4998 sp->myauth.name = NULL; 4999 } 5000 if (sp->myauth.secret) { 5001 free(sp->myauth.secret, M_DEVBUF); 5002 sp->myauth.secret = NULL; 5003 } 5004 if (sp->hisauth.name) { 5005 free(sp->hisauth.name, M_DEVBUF); 5006 sp->hisauth.name = NULL; 5007 } 5008 if (sp->hisauth.secret) { 5009 free(sp->hisauth.secret, M_DEVBUF); 5010 sp->hisauth.secret = NULL; 5011 } 5012 5013 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5014 if (cfg->hisname_length >= MCLBYTES) 5015 return (ENAMETOOLONG); 5016 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5017 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5018 if (error) { 5019 free(sp->hisauth.name, M_DEVBUF); 5020 sp->hisauth.name = NULL; 5021 return error; 5022 } 5023 sp->hisauth.name[cfg->hisname_length-1] = 0; 5024 } 5025 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5026 if (cfg->hissecret_length >= MCLBYTES) 5027 return (ENAMETOOLONG); 5028 sp->hisauth.secret = malloc(cfg->hissecret_length, M_DEVBUF, M_WAITOK); 5029 error = copyin(cfg->hissecret, sp->hisauth.secret, cfg->hissecret_length); 5030 if (error) { 5031 free(sp->hisauth.secret, M_DEVBUF); 5032 sp->hisauth.secret = NULL; 5033 return error; 5034 } 5035 sp->hisauth.secret[cfg->hissecret_length-1] = 0; 5036 } 5037 if (cfg->myname != NULL && cfg->myname_length > 0) { 5038 if (cfg->myname_length >= MCLBYTES) 5039 return (ENAMETOOLONG); 5040 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5041 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5042 if (error) { 5043 free(sp->myauth.name, M_DEVBUF); 5044 sp->myauth.name = NULL; 5045 return error; 5046 } 5047 sp->myauth.name[cfg->myname_length-1] = 0; 5048 } 5049 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5050 if (cfg->mysecret_length >= MCLBYTES) 5051 return (ENAMETOOLONG); 5052 sp->myauth.secret = malloc(cfg->mysecret_length, M_DEVBUF, M_WAITOK); 5053 error = copyin(cfg->mysecret, sp->myauth.secret, cfg->mysecret_length); 5054 if (error) { 5055 free(sp->myauth.secret, M_DEVBUF); 5056 sp->myauth.secret = NULL; 5057 return error; 5058 } 5059 sp->myauth.secret[cfg->mysecret_length-1] = 0; 5060 } 5061 sp->myauth.flags = cfg->myauthflags; 5062 if (cfg->myauth) 5063 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5064 sp->hisauth.flags = cfg->hisauthflags; 5065 if (cfg->hisauth) 5066 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5067 sp->pp_auth_failures = 0; 5068 } 5069 break; 5070 case SPPPGETLCPCFG: 5071 { 5072 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5073 lcp->lcp_timeout = sp->lcp.timeout; 5074 } 5075 break; 5076 case SPPPSETLCPCFG: 5077 { 5078 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5079 sp->lcp.timeout = lcp->lcp_timeout; 5080 } 5081 break; 5082 case SPPPGETSTATUS: 5083 { 5084 struct spppstatus *status = (struct spppstatus *)data; 5085 status->phase = sp->pp_phase; 5086 } 5087 break; 5088 case SPPPGETIDLETO: 5089 { 5090 struct spppidletimeout *to = (struct spppidletimeout *)data; 5091 to->idle_seconds = sp->pp_idle_timeout; 5092 } 5093 break; 5094 case SPPPSETIDLETO: 5095 { 5096 struct spppidletimeout *to = (struct spppidletimeout *)data; 5097 sp->pp_idle_timeout = to->idle_seconds; 5098 } 5099 break; 5100 case SPPPSETAUTHFAILURE: 5101 { 5102 struct spppauthfailuresettings *afsettings = (struct spppauthfailuresettings *)data; 5103 sp->pp_max_auth_fail = afsettings->max_failures; 5104 sp->pp_auth_failures = 0; 5105 } 5106 break; 5107 case SPPPGETAUTHFAILURES: 5108 { 5109 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5110 stats->auth_failures = sp->pp_auth_failures; 5111 stats->max_failures = sp->pp_max_auth_fail; 5112 } 5113 break; 5114 case SPPPSETDNSOPTS: 5115 { 5116 struct spppdnssettings *req = (struct spppdnssettings*)data; 5117 sp->query_dns = req->query_dns & 3; 5118 } 5119 break; 5120 case SPPPGETDNSOPTS: 5121 { 5122 struct spppdnssettings *req = (struct spppdnssettings*)data; 5123 req->query_dns = sp->query_dns; 5124 } 5125 break; 5126 case SPPPGETDNSADDRS: 5127 { 5128 struct spppdnsaddrs *addrs = (struct spppdnsaddrs*)data; 5129 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5130 } 5131 break; 5132 default: 5133 return (EINVAL); 5134 } 5135 5136 return (0); 5137 } 5138 5139 static void 5140 sppp_phase_network(struct sppp *sp) 5141 { 5142 STDDCL; 5143 int i; 5144 u_int32_t mask; 5145 5146 sp->pp_phase = SPPP_PHASE_NETWORK; 5147 5148 if(debug) 5149 { 5150 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 5151 sppp_phase_name(sp->pp_phase)); 5152 } 5153 5154 /* Notify NCPs now. */ 5155 for (i = 0; i < IDX_COUNT; i++) 5156 if ((cps[i])->flags & CP_NCP) 5157 (cps[i])->Open(sp); 5158 5159 /* Send Up events to all NCPs. */ 5160 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5161 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) 5162 (cps[i])->Up(sp); 5163 5164 /* if no NCP is starting, all this was in vain, close down */ 5165 sppp_lcp_check_and_close(sp); 5166 } 5167 5168 5169 static const char * 5170 sppp_cp_type_name(u_char type) 5171 { 5172 static char buf[12]; 5173 switch (type) { 5174 case CONF_REQ: return "conf-req"; 5175 case CONF_ACK: return "conf-ack"; 5176 case CONF_NAK: return "conf-nak"; 5177 case CONF_REJ: return "conf-rej"; 5178 case TERM_REQ: return "term-req"; 5179 case TERM_ACK: return "term-ack"; 5180 case CODE_REJ: return "code-rej"; 5181 case PROTO_REJ: return "proto-rej"; 5182 case ECHO_REQ: return "echo-req"; 5183 case ECHO_REPLY: return "echo-reply"; 5184 case DISC_REQ: return "discard-req"; 5185 } 5186 sprintf (buf, "0x%x", type); 5187 return buf; 5188 } 5189 5190 static const char * 5191 sppp_auth_type_name(u_short proto, u_char type) 5192 { 5193 static char buf[12]; 5194 switch (proto) { 5195 case PPP_CHAP: 5196 switch (type) { 5197 case CHAP_CHALLENGE: return "challenge"; 5198 case CHAP_RESPONSE: return "response"; 5199 case CHAP_SUCCESS: return "success"; 5200 case CHAP_FAILURE: return "failure"; 5201 } 5202 case PPP_PAP: 5203 switch (type) { 5204 case PAP_REQ: return "req"; 5205 case PAP_ACK: return "ack"; 5206 case PAP_NAK: return "nak"; 5207 } 5208 } 5209 sprintf (buf, "0x%x", type); 5210 return buf; 5211 } 5212 5213 static const char * 5214 sppp_lcp_opt_name(u_char opt) 5215 { 5216 static char buf[12]; 5217 switch (opt) { 5218 case LCP_OPT_MRU: return "mru"; 5219 case LCP_OPT_ASYNC_MAP: return "async-map"; 5220 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 5221 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 5222 case LCP_OPT_MAGIC: return "magic"; 5223 case LCP_OPT_PROTO_COMP: return "proto-comp"; 5224 case LCP_OPT_ADDR_COMP: return "addr-comp"; 5225 } 5226 sprintf (buf, "0x%x", opt); 5227 return buf; 5228 } 5229 5230 static const char * 5231 sppp_ipcp_opt_name(u_char opt) 5232 { 5233 static char buf[12]; 5234 switch (opt) { 5235 case IPCP_OPT_ADDRESSES: return "addresses"; 5236 case IPCP_OPT_COMPRESSION: return "compression"; 5237 case IPCP_OPT_ADDRESS: return "address"; 5238 } 5239 sprintf (buf, "0x%x", opt); 5240 return buf; 5241 } 5242 5243 #ifdef INET6 5244 static const char * 5245 sppp_ipv6cp_opt_name(u_char opt) 5246 { 5247 static char buf[12]; 5248 switch (opt) { 5249 case IPV6CP_OPT_IFID: return "ifid"; 5250 case IPV6CP_OPT_COMPRESSION: return "compression"; 5251 } 5252 sprintf (buf, "0x%x", opt); 5253 return buf; 5254 } 5255 #endif 5256 5257 static const char * 5258 sppp_state_name(int state) 5259 { 5260 switch (state) { 5261 case STATE_INITIAL: return "initial"; 5262 case STATE_STARTING: return "starting"; 5263 case STATE_CLOSED: return "closed"; 5264 case STATE_STOPPED: return "stopped"; 5265 case STATE_CLOSING: return "closing"; 5266 case STATE_STOPPING: return "stopping"; 5267 case STATE_REQ_SENT: return "req-sent"; 5268 case STATE_ACK_RCVD: return "ack-rcvd"; 5269 case STATE_ACK_SENT: return "ack-sent"; 5270 case STATE_OPENED: return "opened"; 5271 } 5272 return "illegal"; 5273 } 5274 5275 static const char * 5276 sppp_phase_name(int phase) 5277 { 5278 switch (phase) { 5279 case SPPP_PHASE_DEAD: return "dead"; 5280 case SPPP_PHASE_ESTABLISH: return "establish"; 5281 case SPPP_PHASE_TERMINATE: return "terminate"; 5282 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 5283 case SPPP_PHASE_NETWORK: return "network"; 5284 } 5285 return "illegal"; 5286 } 5287 5288 static const char * 5289 sppp_proto_name(u_short proto) 5290 { 5291 static char buf[12]; 5292 switch (proto) { 5293 case PPP_LCP: return "lcp"; 5294 case PPP_IPCP: return "ipcp"; 5295 case PPP_PAP: return "pap"; 5296 case PPP_CHAP: return "chap"; 5297 case PPP_IPV6CP: return "ipv6cp"; 5298 } 5299 sprintf(buf, "0x%x", (unsigned)proto); 5300 return buf; 5301 } 5302 5303 static void 5304 sppp_print_bytes(const u_char *p, u_short len) 5305 { 5306 addlog(" %02x", *p++); 5307 while (--len > 0) 5308 addlog("-%02x", *p++); 5309 } 5310 5311 static void 5312 sppp_print_string(const char *p, u_short len) 5313 { 5314 u_char c; 5315 5316 while (len-- > 0) { 5317 c = *p++; 5318 /* 5319 * Print only ASCII chars directly. RFC 1994 recommends 5320 * using only them, but we don't rely on it. */ 5321 if (c < ' ' || c > '~') 5322 addlog("\\x%x", c); 5323 else 5324 addlog("%c", c); 5325 } 5326 } 5327 5328 static const char * 5329 sppp_dotted_quad(u_int32_t addr) 5330 { 5331 static char s[16]; 5332 sprintf(s, "%d.%d.%d.%d", 5333 (int)((addr >> 24) & 0xff), 5334 (int)((addr >> 16) & 0xff), 5335 (int)((addr >> 8) & 0xff), 5336 (int)(addr & 0xff)); 5337 return s; 5338 } 5339 5340 /* a dummy, used to drop uninteresting events */ 5341 static void 5342 sppp_null(struct sppp *unused) 5343 { 5344 /* do just nothing */ 5345 } 5346 /* 5347 * This file is large. Tell emacs to highlight it nevertheless. 5348 * 5349 * Local Variables: 5350 * hilit-auto-highlight-maxout: 120000 5351 * End: 5352 */ 5353
Indexes created Tue Oct 14 15:09:51 GMT 2025