if_spppsubr.c revision 1.45
1 /* $NetBSD: if_spppsubr.c,v 1.45 2002/03/02 16:23:42 martin Exp $ */ 2 3 /* 4 * Synchronous PPP/Cisco link level subroutines. 5 * Keepalive protocol implemented in both Cisco and PPP modes. 6 * 7 * Copyright (C) 1994-1996 Cronyx Engineering Ltd. 8 * Author: Serge Vakulenko, <vak (at) cronyx.ru> 9 * 10 * Heavily revamped to conform to RFC 1661. 11 * Copyright (C) 1997, Joerg Wunsch. 12 * 13 * RFC2472 IPv6CP support. 14 * Copyright (C) 2000, Jun-ichiro itojun Hagino <itojun (at) iijlab.net>. 15 * 16 * This software is distributed with NO WARRANTIES, not even the implied 17 * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 18 * 19 * Authors grant any other persons or organisations permission to use 20 * or modify this software as long as this message is kept with the software, 21 * all derivative works or modified versions. 22 * 23 * From: Version 2.4, Thu Apr 30 17:17:21 MSD 1997 24 * 25 * From: if_spppsubr.c,v 1.39 1998/04/04 13:26:03 phk Exp 26 * 27 * From: Id: if_spppsubr.c,v 1.23 1999/02/23 14:47:50 hm Exp 28 */ 29 30 #include <sys/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: if_spppsubr.c,v 1.45 2002/03/02 16:23:42 martin Exp $"); 32 33 #include "opt_inet.h" 34 #include "opt_ipx.h" 35 #include "opt_iso.h" 36 #include "opt_ns.h" 37 38 #include <sys/param.h> 39 #include <sys/proc.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/sockio.h> 43 #include <sys/socket.h> 44 #include <sys/syslog.h> 45 #include <sys/malloc.h> 46 #include <sys/mbuf.h> 47 #include <sys/callout.h> 48 #include <sys/md5.h> 49 50 #include <net/if.h> 51 #include <net/netisr.h> 52 #include <net/if_types.h> 53 #include <net/route.h> 54 #include <net/ppp_defs.h> 55 56 #include <machine/stdarg.h> 57 58 #include <netinet/in.h> 59 #include <netinet/in_systm.h> 60 #include <netinet/in_var.h> 61 #ifdef INET 62 #include <netinet/ip.h> 63 #include <netinet/tcp.h> 64 #endif 65 #include <net/ethertypes.h> 66 67 #ifdef IPX 68 #include <netipx/ipx.h> 69 #include <netipx/ipx_if.h> 70 #endif 71 72 #ifdef NS 73 #include <netns/ns.h> 74 #include <netns/ns_if.h> 75 #endif 76 77 #ifdef ISO 78 #include <netiso/argo_debug.h> 79 #include <netiso/iso.h> 80 #include <netiso/iso_var.h> 81 #include <netiso/iso_snpac.h> 82 #endif 83 84 #include <net/if_sppp.h> 85 #include <net/if_spppvar.h> 86 87 #define MAXALIVECNT 3 /* max. alive packets */ 88 #define DEFAULT_MAX_AUTH_FAILURES 5 /* max. auth. failures */ 89 90 /* 91 * Interface flags that can be set in an ifconfig command. 92 * 93 * Setting link0 will make the link passive, i.e. it will be marked 94 * as being administrative openable, but won't be opened to begin 95 * with. Incoming calls will be answered, or subsequent calls with 96 * -link1 will cause the administrative open of the LCP layer. 97 * 98 * Setting link1 will cause the link to auto-dial only as packets 99 * arrive to be sent. 100 * 101 * Setting IFF_DEBUG will syslog the option negotiation and state 102 * transitions at level kern.debug. Note: all logs consistently look 103 * like 104 * 105 * <if-name><unit>: <proto-name> <additional info...> 106 * 107 * with <if-name><unit> being something like "bppp0", and <proto-name> 108 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc. 109 */ 110 111 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ 112 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */ 113 114 #define CONF_REQ 1 /* PPP configure request */ 115 #define CONF_ACK 2 /* PPP configure acknowledge */ 116 #define CONF_NAK 3 /* PPP configure negative ack */ 117 #define CONF_REJ 4 /* PPP configure reject */ 118 #define TERM_REQ 5 /* PPP terminate request */ 119 #define TERM_ACK 6 /* PPP terminate acknowledge */ 120 #define CODE_REJ 7 /* PPP code reject */ 121 #define PROTO_REJ 8 /* PPP protocol reject */ 122 #define ECHO_REQ 9 /* PPP echo request */ 123 #define ECHO_REPLY 10 /* PPP echo reply */ 124 #define DISC_REQ 11 /* PPP discard request */ 125 126 #define LCP_OPT_MRU 1 /* maximum receive unit */ 127 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */ 128 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ 129 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ 130 #define LCP_OPT_MAGIC 5 /* magic number */ 131 #define LCP_OPT_RESERVED 6 /* reserved */ 132 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ 133 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ 134 135 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ 136 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol */ 137 #define IPCP_OPT_ADDRESS 3 /* local IP address */ 138 #define IPCP_OPT_PRIMDNS 129 /* primary remote dns address */ 139 #define IPCP_OPT_SECDNS 131 /* secondary remote dns address */ 140 141 #define IPV6CP_OPT_IFID 1 /* interface identifier */ 142 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ 143 144 #define PAP_REQ 1 /* PAP name/password request */ 145 #define PAP_ACK 2 /* PAP acknowledge */ 146 #define PAP_NAK 3 /* PAP fail */ 147 148 #define CHAP_CHALLENGE 1 /* CHAP challenge request */ 149 #define CHAP_RESPONSE 2 /* CHAP challenge response */ 150 #define CHAP_SUCCESS 3 /* CHAP response ok */ 151 #define CHAP_FAILURE 4 /* CHAP response failed */ 152 153 #define CHAP_MD5 5 /* hash algorithm - MD5 */ 154 155 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */ 156 #define CISCO_UNICAST 0x0f /* Cisco unicast address */ 157 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ 158 #define CISCO_ADDR_REQ 0 /* Cisco address request */ 159 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */ 160 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ 161 162 /* states are named and numbered according to RFC 1661 */ 163 #define STATE_INITIAL 0 164 #define STATE_STARTING 1 165 #define STATE_CLOSED 2 166 #define STATE_STOPPED 3 167 #define STATE_CLOSING 4 168 #define STATE_STOPPING 5 169 #define STATE_REQ_SENT 6 170 #define STATE_ACK_RCVD 7 171 #define STATE_ACK_SENT 8 172 #define STATE_OPENED 9 173 174 struct ppp_header { 175 u_char address; 176 u_char control; 177 u_short protocol; 178 } __attribute__((__packed__)); 179 #define PPP_HEADER_LEN sizeof (struct ppp_header) 180 181 struct lcp_header { 182 u_char type; 183 u_char ident; 184 u_short len; 185 } __attribute__((__packed__)); 186 #define LCP_HEADER_LEN sizeof (struct lcp_header) 187 188 struct cisco_packet { 189 u_int32_t type; 190 u_int32_t par1; 191 u_int32_t par2; 192 u_short rel; 193 u_short time0; 194 u_short time1; 195 } __attribute__((__packed__)); 196 #define CISCO_PACKET_LEN 18 197 198 /* 199 * We follow the spelling and capitalization of RFC 1661 here, to make 200 * it easier comparing with the standard. Please refer to this RFC in 201 * case you can't make sense out of these abbreviation; it will also 202 * explain the semantics related to the various events and actions. 203 */ 204 struct cp { 205 u_short proto; /* PPP control protocol number */ 206 u_char protoidx; /* index into state table in struct sppp */ 207 u_char flags; 208 #define CP_LCP 0x01 /* this is the LCP */ 209 #define CP_AUTH 0x02 /* this is an authentication protocol */ 210 #define CP_NCP 0x04 /* this is a NCP */ 211 #define CP_QUAL 0x08 /* this is a quality reporting protocol */ 212 const char *name; /* name of this control protocol */ 213 /* event handlers */ 214 void (*Up)(struct sppp *sp); 215 void (*Down)(struct sppp *sp); 216 void (*Open)(struct sppp *sp); 217 void (*Close)(struct sppp *sp); 218 void (*TO)(void *sp); 219 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len); 220 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len); 221 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len); 222 /* actions */ 223 void (*tlu)(struct sppp *sp); 224 void (*tld)(struct sppp *sp); 225 void (*tls)(struct sppp *sp); 226 void (*tlf)(struct sppp *sp); 227 void (*scr)(struct sppp *sp); 228 }; 229 230 static struct sppp *spppq; 231 static struct callout keepalive_ch; 232 233 #ifdef __FreeBSD__ 234 #define SPP_FMT "%s%d: " 235 #define SPP_ARGS(ifp) (ifp)->if_name, (ifp)->if_unit 236 #else 237 #define SPP_FMT "%s: " 238 #define SPP_ARGS(ifp) (ifp)->if_xname 239 #endif 240 241 #ifdef INET 242 /* 243 * The following disgusting hack gets around the problem that IP TOS 244 * can't be set yet. We want to put "interactive" traffic on a high 245 * priority queue. To decide if traffic is interactive, we check that 246 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 247 * 248 * XXX is this really still necessary? - joerg - 249 */ 250 static u_short interactive_ports[8] = { 251 0, 513, 0, 0, 252 0, 21, 0, 23, 253 }; 254 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 255 #endif 256 257 /* almost every function needs these */ 258 #define STDDCL \ 259 struct ifnet *ifp = &sp->pp_if; \ 260 int debug = ifp->if_flags & IFF_DEBUG 261 262 static int sppp_output(struct ifnet *ifp, struct mbuf *m, 263 struct sockaddr *dst, struct rtentry *rt); 264 265 static void sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2); 266 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m); 267 268 static void sppp_cp_input(const struct cp *cp, struct sppp *sp, 269 struct mbuf *m); 270 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 271 u_char ident, u_short len, void *data); 272 /* static void sppp_cp_timeout(void *arg); */ 273 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp, 274 int newstate); 275 static void sppp_auth_send(const struct cp *cp, 276 struct sppp *sp, unsigned int type, unsigned int id, 277 ...); 278 279 static void sppp_up_event(const struct cp *cp, struct sppp *sp); 280 static void sppp_down_event(const struct cp *cp, struct sppp *sp); 281 static void sppp_open_event(const struct cp *cp, struct sppp *sp); 282 static void sppp_close_event(const struct cp *cp, struct sppp *sp); 283 static void sppp_to_event(const struct cp *cp, struct sppp *sp); 284 285 static void sppp_null(struct sppp *sp); 286 287 static void sppp_lcp_init(struct sppp *sp); 288 static void sppp_lcp_up(struct sppp *sp); 289 static void sppp_lcp_down(struct sppp *sp); 290 static void sppp_lcp_open(struct sppp *sp); 291 static void sppp_lcp_close(struct sppp *sp); 292 static void sppp_lcp_TO(void *sp); 293 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 294 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 295 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 296 static void sppp_lcp_tlu(struct sppp *sp); 297 static void sppp_lcp_tld(struct sppp *sp); 298 static void sppp_lcp_tls(struct sppp *sp); 299 static void sppp_lcp_tlf(struct sppp *sp); 300 static void sppp_lcp_scr(struct sppp *sp); 301 static void sppp_lcp_check_and_close(struct sppp *sp); 302 static int sppp_ncp_check(struct sppp *sp); 303 304 static void sppp_ipcp_init(struct sppp *sp); 305 static void sppp_ipcp_up(struct sppp *sp); 306 static void sppp_ipcp_down(struct sppp *sp); 307 static void sppp_ipcp_open(struct sppp *sp); 308 static void sppp_ipcp_close(struct sppp *sp); 309 static void sppp_ipcp_TO(void *sp); 310 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 311 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 312 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 313 static void sppp_ipcp_tlu(struct sppp *sp); 314 static void sppp_ipcp_tld(struct sppp *sp); 315 static void sppp_ipcp_tls(struct sppp *sp); 316 static void sppp_ipcp_tlf(struct sppp *sp); 317 static void sppp_ipcp_scr(struct sppp *sp); 318 319 static void sppp_ipv6cp_init(struct sppp *sp); 320 static void sppp_ipv6cp_up(struct sppp *sp); 321 static void sppp_ipv6cp_down(struct sppp *sp); 322 static void sppp_ipv6cp_open(struct sppp *sp); 323 static void sppp_ipv6cp_close(struct sppp *sp); 324 static void sppp_ipv6cp_TO(void *sp); 325 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len); 326 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 327 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 328 static void sppp_ipv6cp_tlu(struct sppp *sp); 329 static void sppp_ipv6cp_tld(struct sppp *sp); 330 static void sppp_ipv6cp_tls(struct sppp *sp); 331 static void sppp_ipv6cp_tlf(struct sppp *sp); 332 static void sppp_ipv6cp_scr(struct sppp *sp); 333 334 static void sppp_pap_input(struct sppp *sp, struct mbuf *m); 335 static void sppp_pap_init(struct sppp *sp); 336 static void sppp_pap_open(struct sppp *sp); 337 static void sppp_pap_close(struct sppp *sp); 338 static void sppp_pap_TO(void *sp); 339 static void sppp_pap_my_TO(void *sp); 340 static void sppp_pap_tlu(struct sppp *sp); 341 static void sppp_pap_tld(struct sppp *sp); 342 static void sppp_pap_scr(struct sppp *sp); 343 344 static void sppp_chap_input(struct sppp *sp, struct mbuf *m); 345 static void sppp_chap_init(struct sppp *sp); 346 static void sppp_chap_open(struct sppp *sp); 347 static void sppp_chap_close(struct sppp *sp); 348 static void sppp_chap_TO(void *sp); 349 static void sppp_chap_tlu(struct sppp *sp); 350 static void sppp_chap_tld(struct sppp *sp); 351 static void sppp_chap_scr(struct sppp *sp); 352 353 static const char *sppp_auth_type_name(u_short proto, u_char type); 354 static const char *sppp_cp_type_name(u_char type); 355 static const char *sppp_dotted_quad(u_int32_t addr); 356 static const char *sppp_ipcp_opt_name(u_char opt); 357 #ifdef INET6 358 static const char *sppp_ipv6cp_opt_name(u_char opt); 359 #endif 360 static const char *sppp_lcp_opt_name(u_char opt); 361 static const char *sppp_phase_name(int phase); 362 static const char *sppp_proto_name(u_short proto); 363 static const char *sppp_state_name(int state); 364 static int sppp_params(struct sppp *sp, int cmd, void *data); 365 static void sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, 366 u_int32_t *srcmask); 367 static void sppp_keepalive(void *dummy); 368 static void sppp_phase_network(struct sppp *sp); 369 static void sppp_print_bytes(const u_char *p, u_short len); 370 static void sppp_print_string(const char *p, u_short len); 371 static void sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr); 372 static void sppp_clear_ip_addrs(struct sppp *sp); 373 #ifdef INET6 374 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, 375 struct in6_addr *dst, struct in6_addr *srcmask); 376 #ifdef IPV6CP_MYIFID_DYN 377 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src); 378 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src); 379 #endif 380 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src); 381 #endif 382 383 /* our control protocol descriptors */ 384 static const struct cp lcp = { 385 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 386 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close, 387 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak, 388 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf, 389 sppp_lcp_scr 390 }; 391 392 static const struct cp ipcp = { 393 PPP_IPCP, IDX_IPCP, 394 #ifdef INET 395 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 396 #else 397 0, 398 #endif 399 "ipcp", 400 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close, 401 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak, 402 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf, 403 sppp_ipcp_scr 404 }; 405 406 static const struct cp ipv6cp = { 407 PPP_IPV6CP, IDX_IPV6CP, 408 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 409 CP_NCP, 410 #else 411 0, 412 #endif 413 "ipv6cp", 414 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close, 415 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak, 416 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf, 417 sppp_ipv6cp_scr 418 }; 419 420 static const struct cp pap = { 421 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 422 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close, 423 sppp_pap_TO, 0, 0, 0, 424 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null, 425 sppp_pap_scr 426 }; 427 428 static const struct cp chap = { 429 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 430 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close, 431 sppp_chap_TO, 0, 0, 0, 432 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null, 433 sppp_chap_scr 434 }; 435 436 static const struct cp *cps[IDX_COUNT] = { 437 &lcp, /* IDX_LCP */ 438 &ipcp, /* IDX_IPCP */ 439 &ipv6cp, /* IDX_IPV6CP */ 440 &pap, /* IDX_PAP */ 441 &chap, /* IDX_CHAP */ 442 }; 443 444 445 /* 446 * Exported functions, comprising our interface to the lower layer. 447 */ 448 449 /* 450 * Process the received packet. 451 */ 452 void 453 sppp_input(struct ifnet *ifp, struct mbuf *m) 454 { 455 struct ppp_header *h = NULL; 456 struct ifqueue *inq = 0; 457 u_int16_t protocol; 458 int s; 459 struct sppp *sp = (struct sppp *)ifp; 460 int debug = ifp->if_flags & IFF_DEBUG; 461 462 if (ifp->if_flags & IFF_UP) 463 /* Count received bytes, add hardware framing */ 464 ifp->if_ibytes += m->m_pkthdr.len + sp->pp_framebytes; 465 466 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 467 /* Too small packet, drop it. */ 468 if (debug) 469 log(LOG_DEBUG, 470 SPP_FMT "input packet is too small, %d bytes\n", 471 SPP_ARGS(ifp), m->m_pkthdr.len); 472 drop: 473 ++ifp->if_ierrors; 474 ++ifp->if_iqdrops; 475 m_freem (m); 476 return; 477 } 478 479 if (sp->pp_flags & PP_NOFRAMING) { 480 memcpy(&protocol, mtod(m, void *), 2); 481 protocol = ntohs(protocol); 482 m_adj(m, 2); 483 } else { 484 485 /* Get PPP header. */ 486 h = mtod (m, struct ppp_header*); 487 m_adj (m, PPP_HEADER_LEN); 488 489 switch (h->address) { 490 case PPP_ALLSTATIONS: 491 if (h->control != PPP_UI) 492 goto invalid; 493 if (sp->pp_flags & PP_CISCO) { 494 if (debug) 495 log(LOG_DEBUG, 496 SPP_FMT "PPP packet in Cisco mode " 497 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 498 SPP_ARGS(ifp), 499 h->address, h->control, ntohs(h->protocol)); 500 goto drop; 501 } 502 break; 503 case CISCO_MULTICAST: 504 case CISCO_UNICAST: 505 /* Don't check the control field here (RFC 1547). */ 506 if (! (sp->pp_flags & PP_CISCO)) { 507 if (debug) 508 log(LOG_DEBUG, 509 SPP_FMT "Cisco packet in PPP mode " 510 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 511 SPP_ARGS(ifp), 512 h->address, h->control, ntohs(h->protocol)); 513 goto drop; 514 } 515 switch (ntohs (h->protocol)) { 516 default: 517 ++ifp->if_noproto; 518 goto invalid; 519 case CISCO_KEEPALIVE: 520 sppp_cisco_input ((struct sppp*) ifp, m); 521 m_freem (m); 522 return; 523 #ifdef INET 524 case ETHERTYPE_IP: 525 schednetisr (NETISR_IP); 526 inq = &ipintrq; 527 break; 528 #endif 529 #ifdef INET6 530 case ETHERTYPE_IPV6: 531 schednetisr (NETISR_IPV6); 532 inq = &ip6intrq; 533 break; 534 #endif 535 #ifdef IPX 536 case ETHERTYPE_IPX: 537 schednetisr (NETISR_IPX); 538 inq = &ipxintrq; 539 break; 540 #endif 541 #ifdef NS 542 case ETHERTYPE_NS: 543 schednetisr (NETISR_NS); 544 inq = &nsintrq; 545 break; 546 #endif 547 } 548 goto queue_pkt; 549 default: /* Invalid PPP packet. */ 550 invalid: 551 if (debug) 552 log(LOG_DEBUG, 553 SPP_FMT "invalid input packet " 554 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 555 SPP_ARGS(ifp), 556 h->address, h->control, ntohs(h->protocol)); 557 goto drop; 558 } 559 protocol = ntohs (h->protocol); 560 } 561 562 switch (protocol) { 563 default: 564 if (sp->state[IDX_LCP] == STATE_OPENED) { 565 u_int16_t prot = htons(protocol); 566 sppp_cp_send (sp, PPP_LCP, PROTO_REJ, 567 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2, 568 &prot); 569 } 570 if (debug) 571 log(LOG_DEBUG, 572 SPP_FMT "invalid input protocol " 573 "<proto=0x%x>\n", SPP_ARGS(ifp), ntohs(protocol)); 574 ++ifp->if_noproto; 575 goto drop; 576 case PPP_LCP: 577 sppp_cp_input(&lcp, sp, m); 578 m_freem (m); 579 return; 580 case PPP_PAP: 581 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 582 sppp_pap_input(sp, m); 583 m_freem (m); 584 return; 585 case PPP_CHAP: 586 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 587 sppp_chap_input(sp, m); 588 m_freem (m); 589 return; 590 #ifdef INET 591 case PPP_IPCP: 592 if (sp->pp_phase == SPPP_PHASE_NETWORK) 593 sppp_cp_input(&ipcp, sp, m); 594 m_freem (m); 595 return; 596 case PPP_IP: 597 if (sp->state[IDX_IPCP] == STATE_OPENED) { 598 schednetisr (NETISR_IP); 599 inq = &ipintrq; 600 sp->pp_last_activity = time.tv_sec; 601 } 602 break; 603 #endif 604 #ifdef INET6 605 case PPP_IPV6CP: 606 if (sp->pp_phase == SPPP_PHASE_NETWORK) 607 sppp_cp_input(&ipv6cp, sp, m); 608 m_freem (m); 609 return; 610 611 case PPP_IPV6: 612 if (sp->state[IDX_IPV6CP] == STATE_OPENED) { 613 schednetisr (NETISR_IPV6); 614 inq = &ip6intrq; 615 sp->pp_last_activity = time.tv_sec; 616 } 617 break; 618 #endif 619 #ifdef IPX 620 case PPP_IPX: 621 /* IPX IPXCP not implemented yet */ 622 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 623 schednetisr (NETISR_IPX); 624 inq = &ipxintrq; 625 } 626 break; 627 #endif 628 #ifdef NS 629 case PPP_XNS: 630 /* XNS IDPCP not implemented yet */ 631 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 632 schednetisr (NETISR_NS); 633 inq = &nsintrq; 634 } 635 break; 636 #endif 637 #ifdef ISO 638 case PPP_ISO: 639 /* OSI NLCP not implemented yet */ 640 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 641 schednetisr (NETISR_ISO); 642 inq = &clnlintrq; 643 } 644 break; 645 #endif 646 } 647 648 queue_pkt: 649 if (! (ifp->if_flags & IFF_UP) || ! inq) 650 goto drop; 651 652 /* Check queue. */ 653 s = splnet(); 654 if (IF_QFULL (inq)) { 655 /* Queue overflow. */ 656 IF_DROP(inq); 657 splx(s); 658 if (debug) 659 log(LOG_DEBUG, SPP_FMT "protocol queue overflow\n", 660 SPP_ARGS(ifp)); 661 goto drop; 662 } 663 IF_ENQUEUE(inq, m); 664 splx(s); 665 } 666 667 /* 668 * Enqueue transmit packet. 669 */ 670 static int 671 sppp_output(struct ifnet *ifp, struct mbuf *m, 672 struct sockaddr *dst, struct rtentry *rt) 673 { 674 struct sppp *sp = (struct sppp*) ifp; 675 struct ppp_header *h = NULL; 676 struct ifqueue *ifq = NULL; /* XXX */ 677 int s, len, rv = 0; 678 u_int16_t protocol; 679 ALTQ_DECL(struct altq_pktattr pktattr;) 680 681 s = splnet(); 682 683 sp->pp_last_activity = time.tv_sec; 684 685 if ((ifp->if_flags & IFF_UP) == 0 || 686 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 687 m_freem (m); 688 splx (s); 689 return (ENETDOWN); 690 } 691 692 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 693 /* 694 * Interface is not yet running, but auto-dial. Need 695 * to start LCP for it. 696 */ 697 ifp->if_flags |= IFF_RUNNING; 698 splx(s); 699 lcp.Open(sp); 700 s = splnet(); 701 } 702 703 /* 704 * If the queueing discipline needs packet classification, 705 * do it before prepending link headers. 706 */ 707 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family, &pktattr); 708 709 #ifdef INET 710 if (dst->sa_family == AF_INET) 711 { 712 /* Check mbuf length here??? */ 713 struct ip *ip = mtod (m, struct ip*); 714 struct tcphdr *tcp = (struct tcphdr*) ((int32_t*)ip + ip->ip_hl); 715 716 /* 717 * When using dynamic local IP address assignment by using 718 * 0.0.0.0 as a local address, the first TCP session will 719 * not connect because the local TCP checksum is computed 720 * using 0.0.0.0 which will later become our real IP address 721 * so the TCP checksum computed at the remote end will 722 * become invalid. So we 723 * - don't let packets with src ip addr 0 thru 724 * - we flag TCP packets with src ip 0 as an error 725 */ 726 727 if(ip->ip_src.s_addr == INADDR_ANY) /* -hm */ 728 { 729 m_freem(m); 730 splx(s); 731 if(ip->ip_p == IPPROTO_TCP) 732 return(EADDRNOTAVAIL); 733 else 734 return(0); 735 } 736 737 /* 738 * Put low delay, telnet, rlogin and ftp control packets 739 * in front of the queue. 740 */ 741 742 if (! IF_QFULL (&sp->pp_fastq) && 743 ((ip->ip_tos & IPTOS_LOWDELAY) || 744 ((ip->ip_p == IPPROTO_TCP && 745 m->m_len >= sizeof (struct ip) + sizeof (struct tcphdr) && 746 (INTERACTIVE (ntohs (tcp->th_sport)))) || 747 INTERACTIVE (ntohs (tcp->th_dport))))) 748 ifq = &sp->pp_fastq; 749 } 750 #endif 751 752 #ifdef INET6 753 if (dst->sa_family == AF_INET6) { 754 /* XXX do something tricky here? */ 755 } 756 #endif 757 758 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 759 /* 760 * Prepend general data packet PPP header. For now, IP only. 761 */ 762 M_PREPEND (m, PPP_HEADER_LEN, M_DONTWAIT); 763 if (! m) { 764 if (ifp->if_flags & IFF_DEBUG) 765 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 766 SPP_ARGS(ifp)); 767 ++ifp->if_oerrors; 768 splx (s); 769 return (ENOBUFS); 770 } 771 /* 772 * May want to check size of packet 773 * (albeit due to the implementation it's always enough) 774 */ 775 h = mtod (m, struct ppp_header*); 776 if (sp->pp_flags & PP_CISCO) { 777 h->address = CISCO_UNICAST; /* unicast address */ 778 h->control = 0; 779 } else { 780 h->address = PPP_ALLSTATIONS; /* broadcast address */ 781 h->control = PPP_UI; /* Unnumbered Info */ 782 } 783 } 784 785 switch (dst->sa_family) { 786 #ifdef INET 787 case AF_INET: /* Internet Protocol */ 788 if (sp->pp_flags & PP_CISCO) 789 protocol = htons (ETHERTYPE_IP); 790 else { 791 /* 792 * Don't choke with an ENETDOWN early. It's 793 * possible that we just started dialing out, 794 * so don't drop the packet immediately. If 795 * we notice that we run out of buffer space 796 * below, we will however remember that we are 797 * not ready to carry IP packets, and return 798 * ENETDOWN, as opposed to ENOBUFS. 799 */ 800 protocol = htons(PPP_IP); 801 if (sp->state[IDX_IPCP] != STATE_OPENED) 802 rv = ENETDOWN; 803 } 804 break; 805 #endif 806 #ifdef INET6 807 case AF_INET6: /* Internet Protocol version 6 */ 808 if (sp->pp_flags & PP_CISCO) 809 protocol = htons (ETHERTYPE_IPV6); 810 else { 811 /* 812 * Don't choke with an ENETDOWN early. It's 813 * possible that we just started dialing out, 814 * so don't drop the packet immediately. If 815 * we notice that we run out of buffer space 816 * below, we will however remember that we are 817 * not ready to carry IP packets, and return 818 * ENETDOWN, as opposed to ENOBUFS. 819 */ 820 protocol = htons(PPP_IPV6); 821 if (sp->state[IDX_IPV6CP] != STATE_OPENED) 822 rv = ENETDOWN; 823 } 824 break; 825 #endif 826 #ifdef NS 827 case AF_NS: /* Xerox NS Protocol */ 828 protocol = htons ((sp->pp_flags & PP_CISCO) ? 829 ETHERTYPE_NS : PPP_XNS); 830 break; 831 #endif 832 #ifdef IPX 833 case AF_IPX: /* Novell IPX Protocol */ 834 protocol = htons ((sp->pp_flags & PP_CISCO) ? 835 ETHERTYPE_IPX : PPP_IPX); 836 break; 837 #endif 838 #ifdef ISO 839 case AF_ISO: /* ISO OSI Protocol */ 840 if (sp->pp_flags & PP_CISCO) 841 goto nosupport; 842 protocol = htons (PPP_ISO); 843 break; 844 nosupport: 845 #endif 846 default: 847 m_freem (m); 848 ++ifp->if_oerrors; 849 splx (s); 850 return (EAFNOSUPPORT); 851 } 852 853 if (sp->pp_flags & PP_NOFRAMING) { 854 M_PREPEND (m, 2, M_DONTWAIT); 855 if (m == NULL) { 856 if (ifp->if_flags & IFF_DEBUG) 857 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 858 SPP_ARGS(ifp)); 859 ++ifp->if_oerrors; 860 splx (s); 861 return (ENOBUFS); 862 } 863 *mtod(m, u_int16_t*) = protocol; 864 } else { 865 h->protocol = protocol; 866 } 867 868 /* 869 * Queue message on interface, and start output if interface 870 * not yet active. 871 */ 872 len = m->m_pkthdr.len; 873 if (ifq != NULL 874 #ifdef ALTQ 875 && ALTQ_IS_ENABLED(&ifp->if_snd) == 0 876 #endif 877 ) { 878 if (IF_QFULL (ifq)) { 879 IF_DROP (&ifp->if_snd); 880 m_freem (m); 881 if (rv == 0) 882 rv = ENOBUFS; 883 } 884 IF_ENQUEUE(ifq, m); 885 } else 886 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, rv); 887 if (rv != 0) { 888 ++ifp->if_oerrors; 889 splx(s); 890 return (rv); 891 } 892 893 if (! (ifp->if_flags & IFF_OACTIVE)) 894 (*ifp->if_start) (ifp); 895 896 /* 897 * Count output packets and bytes. 898 * The packet length includes header + additional hardware framing 899 * according to RFC 1333. 900 */ 901 ifp->if_obytes += len + sp->pp_framebytes; 902 splx (s); 903 return (0); 904 } 905 906 void 907 sppp_attach(struct ifnet *ifp) 908 { 909 struct sppp *sp = (struct sppp*) ifp; 910 911 /* Initialize keepalive handler. */ 912 if (! spppq) { 913 callout_init(&keepalive_ch); 914 callout_reset(&keepalive_ch, hz * 10, sppp_keepalive, NULL); 915 } 916 917 /* Insert new entry into the keepalive list. */ 918 sp->pp_next = spppq; 919 spppq = sp; 920 921 sp->pp_if.if_type = IFT_PPP; 922 sp->pp_if.if_output = sppp_output; 923 sp->pp_fastq.ifq_maxlen = 32; 924 sp->pp_cpq.ifq_maxlen = 20; 925 sp->pp_loopcnt = 0; 926 sp->pp_alivecnt = 0; 927 sp->pp_last_activity = 0; 928 sp->pp_idle_timeout = 0; 929 memset(&sp->pp_seq[0], 0, sizeof(sp->pp_seq)); 930 memset(&sp->pp_rseq[0], 0, sizeof(sp->pp_rseq)); 931 sp->pp_auth_failures = 0; 932 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 933 sp->pp_phase = SPPP_PHASE_DEAD; 934 sp->pp_up = lcp.Up; 935 sp->pp_down = lcp.Down; 936 937 if_alloc_sadl(ifp); 938 939 memset(&sp->myauth, 0, sizeof sp->myauth); 940 memset(&sp->hisauth, 0, sizeof sp->hisauth); 941 sppp_lcp_init(sp); 942 sppp_ipcp_init(sp); 943 sppp_ipv6cp_init(sp); 944 sppp_pap_init(sp); 945 sppp_chap_init(sp); 946 } 947 948 void 949 sppp_detach(struct ifnet *ifp) 950 { 951 struct sppp **q, *p, *sp = (struct sppp*) ifp; 952 int i; 953 954 /* Remove the entry from the keepalive list. */ 955 for (q = &spppq; (p = *q); q = &p->pp_next) 956 if (p == sp) { 957 *q = p->pp_next; 958 break; 959 } 960 961 /* Stop keepalive handler. */ 962 if (! spppq) { 963 callout_stop(&keepalive_ch); 964 } 965 966 for (i = 0; i < IDX_COUNT; i++) { 967 callout_stop(&sp->ch[i]); 968 } 969 callout_stop(&sp->pap_my_to_ch); 970 971 /* free authentication info */ 972 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 973 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 974 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 975 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 976 977 if_free_sadl(ifp); 978 } 979 980 /* 981 * Flush the interface output queue. 982 */ 983 void 984 sppp_flush(struct ifnet *ifp) 985 { 986 struct sppp *sp = (struct sppp*) ifp; 987 988 IFQ_PURGE (&sp->pp_if.if_snd); 989 IF_PURGE (&sp->pp_fastq); 990 IF_PURGE (&sp->pp_cpq); 991 } 992 993 /* 994 * Check if the output queue is empty. 995 */ 996 int 997 sppp_isempty(struct ifnet *ifp) 998 { 999 struct sppp *sp = (struct sppp*) ifp; 1000 int empty, s; 1001 1002 s = splnet(); 1003 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1004 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1005 splx(s); 1006 return (empty); 1007 } 1008 1009 /* 1010 * Get next packet to send. 1011 */ 1012 struct mbuf * 1013 sppp_dequeue(struct ifnet *ifp) 1014 { 1015 struct sppp *sp = (struct sppp*) ifp; 1016 struct mbuf *m; 1017 int s; 1018 1019 s = splnet(); 1020 /* 1021 * Process only the control protocol queue until we have at 1022 * least one NCP open. 1023 * 1024 * Do always serve all three queues in Cisco mode. 1025 */ 1026 IF_DEQUEUE(&sp->pp_cpq, m); 1027 if (m == NULL && 1028 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { 1029 IF_DEQUEUE(&sp->pp_fastq, m); 1030 if (m == NULL) 1031 IF_DEQUEUE (&sp->pp_if.if_snd, m); 1032 } 1033 splx(s); 1034 return m; 1035 } 1036 1037 /* 1038 * Pick the next packet, do not remove it from the queue. 1039 */ 1040 struct mbuf * 1041 sppp_pick(struct ifnet *ifp) 1042 { 1043 struct sppp *sp = (struct sppp*)ifp; 1044 struct mbuf *m; 1045 int s; 1046 1047 s= splnet (); 1048 1049 m = sp->pp_cpq.ifq_head; 1050 if (m == NULL && 1051 (sp->pp_phase == SPPP_PHASE_NETWORK || 1052 (sp->pp_flags & PP_CISCO) != 0)) 1053 if ((m = sp->pp_fastq.ifq_head) == NULL) 1054 m = sp->pp_if.if_snd.ifq_head; 1055 splx (s); 1056 return (m); 1057 } 1058 1059 /* 1060 * Process an ioctl request. Called on low priority level. 1061 */ 1062 int 1063 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1064 { 1065 struct ifreq *ifr = (struct ifreq*) data; 1066 struct sppp *sp = (struct sppp*) ifp; 1067 int s, error=0, going_up, going_down, newmode; 1068 1069 s = splnet(); 1070 switch (cmd) { 1071 case SIOCAIFADDR: 1072 case SIOCSIFDSTADDR: 1073 break; 1074 1075 case SIOCSIFADDR: 1076 if_up(ifp); 1077 /* fall through... */ 1078 1079 case SIOCSIFFLAGS: 1080 going_up = ifp->if_flags & IFF_UP && 1081 (ifp->if_flags & IFF_RUNNING) == 0; 1082 going_down = (ifp->if_flags & IFF_UP) == 0 && 1083 ifp->if_flags & IFF_RUNNING; 1084 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1085 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1086 /* sanity */ 1087 newmode = IFF_PASSIVE; 1088 ifp->if_flags &= ~IFF_AUTO; 1089 } 1090 1091 if (going_up || going_down) 1092 lcp.Close(sp); 1093 if (going_up && newmode == 0) { 1094 /* neither auto-dial nor passive */ 1095 ifp->if_flags |= IFF_RUNNING; 1096 if (!(sp->pp_flags & PP_CISCO)) 1097 lcp.Open(sp); 1098 } else if (going_down) { 1099 sppp_flush(ifp); 1100 ifp->if_flags &= ~IFF_RUNNING; 1101 } 1102 1103 break; 1104 1105 #ifdef SIOCSIFMTU 1106 #ifndef ifr_mtu 1107 #define ifr_mtu ifr_metric 1108 #endif 1109 case SIOCSIFMTU: 1110 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru) 1111 return (EINVAL); 1112 ifp->if_mtu = ifr->ifr_mtu; 1113 break; 1114 #endif 1115 #ifdef SLIOCSETMTU 1116 case SLIOCSETMTU: 1117 if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru) 1118 return (EINVAL); 1119 ifp->if_mtu = *(short*)data; 1120 break; 1121 #endif 1122 #ifdef SIOCGIFMTU 1123 case SIOCGIFMTU: 1124 ifr->ifr_mtu = ifp->if_mtu; 1125 break; 1126 #endif 1127 #ifdef SLIOCGETMTU 1128 case SLIOCGETMTU: 1129 *(short*)data = ifp->if_mtu; 1130 break; 1131 #endif 1132 case SIOCADDMULTI: 1133 case SIOCDELMULTI: 1134 break; 1135 1136 case SPPPSETAUTHCFG: 1137 case SPPPSETLCPCFG: 1138 case SPPPSETIDLETO: 1139 case SPPPSETAUTHFAILURE: 1140 case SPPPSETDNSOPTS: 1141 { 1142 struct proc *p = curproc; /* XXX */ 1143 1144 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1145 break; 1146 } 1147 /* FALLTHROUGH */ 1148 case SPPPGETAUTHCFG: 1149 case SPPPGETLCPCFG: 1150 case SPPPGETSTATUS: 1151 case SPPPGETIDLETO: 1152 case SPPPGETAUTHFAILURES: 1153 case SPPPGETDNSOPTS: 1154 case SPPPGETDNSADDRS: 1155 error = sppp_params(sp, cmd, data); 1156 break; 1157 1158 default: 1159 error = ENOTTY; 1160 } 1161 splx(s); 1162 return (error); 1163 } 1164 1165 1166 /* 1167 * Cisco framing implementation. 1168 */ 1169 1170 /* 1171 * Handle incoming Cisco keepalive protocol packets. 1172 */ 1173 static void 1174 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1175 { 1176 STDDCL; 1177 struct cisco_packet *h; 1178 u_int32_t me, mymask; 1179 1180 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1181 if (debug) 1182 log(LOG_DEBUG, 1183 SPP_FMT "cisco invalid packet length: %d bytes\n", 1184 SPP_ARGS(ifp), m->m_pkthdr.len); 1185 return; 1186 } 1187 h = mtod (m, struct cisco_packet*); 1188 if (debug) 1189 log(LOG_DEBUG, 1190 SPP_FMT "cisco input: %d bytes " 1191 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1192 SPP_ARGS(ifp), m->m_pkthdr.len, 1193 ntohl (h->type), h->par1, h->par2, (u_int)h->rel, 1194 (u_int)h->time0, (u_int)h->time1); 1195 switch (ntohl (h->type)) { 1196 default: 1197 if (debug) 1198 addlog(SPP_FMT "cisco unknown packet type: 0x%x\n", 1199 SPP_ARGS(ifp), ntohl (h->type)); 1200 break; 1201 case CISCO_ADDR_REPLY: 1202 /* Reply on address request, ignore */ 1203 break; 1204 case CISCO_KEEPALIVE_REQ: 1205 sp->pp_alivecnt = 0; 1206 sp->pp_rseq[IDX_LCP] = ntohl (h->par1); 1207 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 1208 /* Local and remote sequence numbers are equal. 1209 * Probably, the line is in loopback mode. */ 1210 if (sp->pp_loopcnt >= MAXALIVECNT) { 1211 printf (SPP_FMT "loopback\n", 1212 SPP_ARGS(ifp)); 1213 sp->pp_loopcnt = 0; 1214 if (ifp->if_flags & IFF_UP) { 1215 if_down (ifp); 1216 IF_PURGE (&sp->pp_cpq); 1217 } 1218 } 1219 ++sp->pp_loopcnt; 1220 1221 /* Generate new local sequence number */ 1222 sp->pp_seq[IDX_LCP] = random(); 1223 break; 1224 } 1225 sp->pp_loopcnt = 0; 1226 if (! (ifp->if_flags & IFF_UP) && 1227 (ifp->if_flags & IFF_RUNNING)) { 1228 if_up(ifp); 1229 } 1230 break; 1231 case CISCO_ADDR_REQ: 1232 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1233 if (me != 0L) 1234 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1235 break; 1236 } 1237 } 1238 1239 /* 1240 * Send Cisco keepalive packet. 1241 */ 1242 static void 1243 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1244 { 1245 STDDCL; 1246 struct ppp_header *h; 1247 struct cisco_packet *ch; 1248 struct mbuf *m; 1249 u_int32_t t = (time.tv_sec - boottime.tv_sec) * 1000; 1250 1251 MGETHDR (m, M_DONTWAIT, MT_DATA); 1252 if (! m) 1253 return; 1254 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1255 m->m_pkthdr.rcvif = 0; 1256 1257 h = mtod (m, struct ppp_header*); 1258 h->address = CISCO_MULTICAST; 1259 h->control = 0; 1260 h->protocol = htons (CISCO_KEEPALIVE); 1261 1262 ch = (struct cisco_packet*) (h + 1); 1263 ch->type = htonl (type); 1264 ch->par1 = htonl (par1); 1265 ch->par2 = htonl (par2); 1266 ch->rel = -1; 1267 1268 ch->time0 = htons ((u_short) (t >> 16)); 1269 ch->time1 = htons ((u_short) t); 1270 1271 if (debug) 1272 log(LOG_DEBUG, 1273 SPP_FMT "cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1274 SPP_ARGS(ifp), ntohl (ch->type), ch->par1, 1275 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1276 (u_int)ch->time1); 1277 1278 if (IF_QFULL (&sp->pp_cpq)) { 1279 IF_DROP (&sp->pp_fastq); 1280 IF_DROP (&ifp->if_snd); 1281 m_freem (m); 1282 } else 1283 IF_ENQUEUE (&sp->pp_cpq, m); 1284 if (! (ifp->if_flags & IFF_OACTIVE)) 1285 (*ifp->if_start) (ifp); 1286 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1287 } 1288 1289 /* 1290 * PPP protocol implementation. 1291 */ 1292 1293 /* 1294 * Send PPP control protocol packet. 1295 */ 1296 static void 1297 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1298 u_char ident, u_short len, void *data) 1299 { 1300 STDDCL; 1301 struct lcp_header *lh; 1302 struct mbuf *m; 1303 size_t pkthdrlen; 1304 1305 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1306 1307 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1308 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1309 MGETHDR (m, M_DONTWAIT, MT_DATA); 1310 if (! m) 1311 return; 1312 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1313 m->m_pkthdr.rcvif = 0; 1314 1315 if (sp->pp_flags & PP_NOFRAMING) { 1316 *mtod(m, u_int16_t*) = htons(proto); 1317 lh = (struct lcp_header*)(mtod(m, u_int8_t*) + 2); 1318 } else { 1319 struct ppp_header *h; 1320 h = mtod (m, struct ppp_header*); 1321 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1322 h->control = PPP_UI; /* Unnumbered Info */ 1323 h->protocol = htons (proto); /* Link Control Protocol */ 1324 lh = (struct lcp_header*) (h + 1); 1325 } 1326 lh->type = type; 1327 lh->ident = ident; 1328 lh->len = htons (LCP_HEADER_LEN + len); 1329 if (len) 1330 bcopy (data, lh+1, len); 1331 1332 if (debug) { 1333 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 1334 SPP_ARGS(ifp), 1335 sppp_proto_name(proto), 1336 sppp_cp_type_name (lh->type), lh->ident, 1337 ntohs (lh->len)); 1338 if (len) 1339 sppp_print_bytes ((u_char*) (lh+1), len); 1340 addlog(">\n"); 1341 } 1342 if (IF_QFULL (&sp->pp_cpq)) { 1343 IF_DROP (&sp->pp_fastq); 1344 IF_DROP (&ifp->if_snd); 1345 m_freem (m); 1346 ++ifp->if_oerrors; 1347 } else 1348 IF_ENQUEUE (&sp->pp_cpq, m); 1349 if (! (ifp->if_flags & IFF_OACTIVE)) 1350 (*ifp->if_start) (ifp); 1351 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1352 } 1353 1354 /* 1355 * Handle incoming PPP control protocol packets. 1356 */ 1357 static void 1358 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1359 { 1360 STDDCL; 1361 struct lcp_header *h; 1362 int len = m->m_pkthdr.len; 1363 int rv; 1364 u_char *p; 1365 u_int32_t u32; 1366 1367 if (len < 4) { 1368 if (debug) 1369 log(LOG_DEBUG, 1370 SPP_FMT "%s invalid packet length: %d bytes\n", 1371 SPP_ARGS(ifp), cp->name, len); 1372 return; 1373 } 1374 h = mtod (m, struct lcp_header*); 1375 if (debug) { 1376 log(LOG_DEBUG, 1377 SPP_FMT "%s input(%s): <%s id=0x%x len=%d", 1378 SPP_ARGS(ifp), cp->name, 1379 sppp_state_name(sp->state[cp->protoidx]), 1380 sppp_cp_type_name (h->type), h->ident, ntohs (h->len)); 1381 if (len > 4) 1382 sppp_print_bytes ((u_char*) (h+1), len-4); 1383 addlog(">\n"); 1384 } 1385 if (len > ntohs (h->len)) 1386 len = ntohs (h->len); 1387 p = (u_char *)(h + 1); 1388 switch (h->type) { 1389 case CONF_REQ: 1390 if (len < 4) { 1391 if (debug) 1392 addlog(SPP_FMT "%s invalid conf-req length %d\n", 1393 SPP_ARGS(ifp), cp->name, 1394 len); 1395 ++ifp->if_ierrors; 1396 break; 1397 } 1398 /* handle states where RCR doesn't get a SCA/SCN */ 1399 switch (sp->state[cp->protoidx]) { 1400 case STATE_CLOSING: 1401 case STATE_STOPPING: 1402 return; 1403 case STATE_CLOSED: 1404 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1405 0, 0); 1406 return; 1407 } 1408 rv = (cp->RCR)(sp, h, len); 1409 switch (sp->state[cp->protoidx]) { 1410 case STATE_OPENED: 1411 (cp->tld)(sp); 1412 (cp->scr)(sp); 1413 /* fall through... */ 1414 case STATE_ACK_SENT: 1415 case STATE_REQ_SENT: 1416 sppp_cp_change_state(cp, sp, rv? 1417 STATE_ACK_SENT: STATE_REQ_SENT); 1418 break; 1419 case STATE_STOPPED: 1420 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1421 (cp->scr)(sp); 1422 sppp_cp_change_state(cp, sp, rv? 1423 STATE_ACK_SENT: STATE_REQ_SENT); 1424 break; 1425 case STATE_ACK_RCVD: 1426 if (rv) { 1427 sppp_cp_change_state(cp, sp, STATE_OPENED); 1428 if (debug) 1429 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1430 SPP_ARGS(ifp), 1431 cp->name); 1432 (cp->tlu)(sp); 1433 } else 1434 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1435 break; 1436 default: 1437 printf(SPP_FMT "%s illegal %s in state %s\n", 1438 SPP_ARGS(ifp), cp->name, 1439 sppp_cp_type_name(h->type), 1440 sppp_state_name(sp->state[cp->protoidx])); 1441 ++ifp->if_ierrors; 1442 } 1443 break; 1444 case CONF_ACK: 1445 if (h->ident != sp->confid[cp->protoidx]) { 1446 if (debug) 1447 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1448 SPP_ARGS(ifp), cp->name, 1449 h->ident, sp->confid[cp->protoidx]); 1450 ++ifp->if_ierrors; 1451 break; 1452 } 1453 switch (sp->state[cp->protoidx]) { 1454 case STATE_CLOSED: 1455 case STATE_STOPPED: 1456 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1457 break; 1458 case STATE_CLOSING: 1459 case STATE_STOPPING: 1460 break; 1461 case STATE_REQ_SENT: 1462 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1463 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1464 break; 1465 case STATE_OPENED: 1466 (cp->tld)(sp); 1467 /* fall through */ 1468 case STATE_ACK_RCVD: 1469 (cp->scr)(sp); 1470 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1471 break; 1472 case STATE_ACK_SENT: 1473 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1474 sppp_cp_change_state(cp, sp, STATE_OPENED); 1475 if (debug) 1476 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1477 SPP_ARGS(ifp), cp->name); 1478 (cp->tlu)(sp); 1479 break; 1480 default: 1481 printf(SPP_FMT "%s illegal %s in state %s\n", 1482 SPP_ARGS(ifp), cp->name, 1483 sppp_cp_type_name(h->type), 1484 sppp_state_name(sp->state[cp->protoidx])); 1485 ++ifp->if_ierrors; 1486 } 1487 break; 1488 case CONF_NAK: 1489 case CONF_REJ: 1490 if (h->ident != sp->confid[cp->protoidx]) { 1491 if (debug) 1492 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1493 SPP_ARGS(ifp), cp->name, 1494 h->ident, sp->confid[cp->protoidx]); 1495 ++ifp->if_ierrors; 1496 break; 1497 } 1498 if (h->type == CONF_NAK) 1499 (cp->RCN_nak)(sp, h, len); 1500 else /* CONF_REJ */ 1501 (cp->RCN_rej)(sp, h, len); 1502 1503 switch (sp->state[cp->protoidx]) { 1504 case STATE_CLOSED: 1505 case STATE_STOPPED: 1506 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1507 break; 1508 case STATE_REQ_SENT: 1509 case STATE_ACK_SENT: 1510 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1511 (cp->scr)(sp); 1512 break; 1513 case STATE_OPENED: 1514 (cp->tld)(sp); 1515 /* fall through */ 1516 case STATE_ACK_RCVD: 1517 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1518 (cp->scr)(sp); 1519 break; 1520 case STATE_CLOSING: 1521 case STATE_STOPPING: 1522 break; 1523 default: 1524 printf(SPP_FMT "%s illegal %s in state %s\n", 1525 SPP_ARGS(ifp), cp->name, 1526 sppp_cp_type_name(h->type), 1527 sppp_state_name(sp->state[cp->protoidx])); 1528 ++ifp->if_ierrors; 1529 } 1530 break; 1531 1532 case TERM_REQ: 1533 switch (sp->state[cp->protoidx]) { 1534 case STATE_ACK_RCVD: 1535 case STATE_ACK_SENT: 1536 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1537 /* fall through */ 1538 case STATE_CLOSED: 1539 case STATE_STOPPED: 1540 case STATE_CLOSING: 1541 case STATE_STOPPING: 1542 case STATE_REQ_SENT: 1543 sta: 1544 /* Send Terminate-Ack packet. */ 1545 if (debug) 1546 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n", 1547 SPP_ARGS(ifp), cp->name); 1548 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1549 break; 1550 case STATE_OPENED: 1551 (cp->tld)(sp); 1552 sp->rst_counter[cp->protoidx] = 0; 1553 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1554 goto sta; 1555 break; 1556 default: 1557 printf(SPP_FMT "%s illegal %s in state %s\n", 1558 SPP_ARGS(ifp), cp->name, 1559 sppp_cp_type_name(h->type), 1560 sppp_state_name(sp->state[cp->protoidx])); 1561 ++ifp->if_ierrors; 1562 } 1563 break; 1564 case TERM_ACK: 1565 switch (sp->state[cp->protoidx]) { 1566 case STATE_CLOSED: 1567 case STATE_STOPPED: 1568 case STATE_REQ_SENT: 1569 case STATE_ACK_SENT: 1570 break; 1571 case STATE_CLOSING: 1572 (cp->tlf)(sp); 1573 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1574 sppp_lcp_check_and_close(sp); 1575 break; 1576 case STATE_STOPPING: 1577 (cp->tlf)(sp); 1578 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1579 sppp_lcp_check_and_close(sp); 1580 break; 1581 case STATE_ACK_RCVD: 1582 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1583 break; 1584 case STATE_OPENED: 1585 (cp->tld)(sp); 1586 (cp->scr)(sp); 1587 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1588 break; 1589 default: 1590 printf(SPP_FMT "%s illegal %s in state %s\n", 1591 SPP_ARGS(ifp), cp->name, 1592 sppp_cp_type_name(h->type), 1593 sppp_state_name(sp->state[cp->protoidx])); 1594 ++ifp->if_ierrors; 1595 } 1596 break; 1597 case CODE_REJ: 1598 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1599 log(LOG_INFO, 1600 SPP_FMT "%s: ignoring RXJ (%s) for code ?, " 1601 "danger will robinson\n", 1602 SPP_ARGS(ifp), cp->name, 1603 sppp_cp_type_name(h->type)); 1604 switch (sp->state[cp->protoidx]) { 1605 case STATE_CLOSED: 1606 case STATE_STOPPED: 1607 case STATE_REQ_SENT: 1608 case STATE_ACK_SENT: 1609 case STATE_CLOSING: 1610 case STATE_STOPPING: 1611 case STATE_OPENED: 1612 break; 1613 case STATE_ACK_RCVD: 1614 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1615 break; 1616 default: 1617 printf(SPP_FMT "%s illegal %s in state %s\n", 1618 SPP_ARGS(ifp), cp->name, 1619 sppp_cp_type_name(h->type), 1620 sppp_state_name(sp->state[cp->protoidx])); 1621 ++ifp->if_ierrors; 1622 } 1623 break; 1624 case PROTO_REJ: 1625 { 1626 int catastrophic; 1627 const struct cp *upper; 1628 int i; 1629 u_int16_t proto; 1630 1631 catastrophic = 0; 1632 upper = NULL; 1633 proto = p[0] << 8 | p[1]; 1634 for (i = 0; i < IDX_COUNT; i++) { 1635 if (cps[i]->proto == proto) { 1636 upper = cps[i]; 1637 break; 1638 } 1639 } 1640 if (upper == NULL) 1641 catastrophic++; 1642 1643 log(LOG_INFO, 1644 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1645 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+', 1646 sppp_cp_type_name(h->type), proto, 1647 upper ? upper->name : "unknown", 1648 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1649 1650 /* 1651 * if we got RXJ+ against conf-req, the peer does not implement 1652 * this particular protocol type. terminate the protocol. 1653 */ 1654 if (upper && !catastrophic) { 1655 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1656 upper->Close(sp); 1657 break; 1658 } 1659 } 1660 1661 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1662 switch (sp->state[cp->protoidx]) { 1663 case STATE_CLOSED: 1664 case STATE_STOPPED: 1665 case STATE_REQ_SENT: 1666 case STATE_ACK_SENT: 1667 case STATE_CLOSING: 1668 case STATE_STOPPING: 1669 case STATE_OPENED: 1670 break; 1671 case STATE_ACK_RCVD: 1672 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1673 break; 1674 default: 1675 printf(SPP_FMT "%s illegal %s in state %s\n", 1676 SPP_ARGS(ifp), cp->name, 1677 sppp_cp_type_name(h->type), 1678 sppp_state_name(sp->state[cp->protoidx])); 1679 ++ifp->if_ierrors; 1680 } 1681 break; 1682 } 1683 case DISC_REQ: 1684 if (cp->proto != PPP_LCP) 1685 goto illegal; 1686 /* Discard the packet. */ 1687 break; 1688 case ECHO_REQ: 1689 if (cp->proto != PPP_LCP) 1690 goto illegal; 1691 if (sp->state[cp->protoidx] != STATE_OPENED) { 1692 if (debug) 1693 addlog(SPP_FMT "lcp echo req but lcp closed\n", 1694 SPP_ARGS(ifp)); 1695 ++ifp->if_ierrors; 1696 break; 1697 } 1698 if (len < 8) { 1699 if (debug) 1700 addlog(SPP_FMT "invalid lcp echo request " 1701 "packet length: %d bytes\n", 1702 SPP_ARGS(ifp), len); 1703 break; 1704 } 1705 memcpy(&u32, h + 1, sizeof u32); 1706 if (ntohl(u32) == sp->lcp.magic) { 1707 /* Line loopback mode detected. */ 1708 printf(SPP_FMT "loopback\n", SPP_ARGS(ifp)); 1709 if_down (ifp); 1710 IF_PURGE (&sp->pp_cpq); 1711 1712 /* Shut down the PPP link. */ 1713 /* XXX */ 1714 lcp.Down(sp); 1715 lcp.Up(sp); 1716 break; 1717 } 1718 u32 = htonl(sp->lcp.magic); 1719 memcpy(h + 1, &u32, sizeof u32); 1720 if (debug) 1721 addlog(SPP_FMT "got lcp echo req, sending echo rep\n", 1722 SPP_ARGS(ifp)); 1723 sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1); 1724 break; 1725 case ECHO_REPLY: 1726 if (cp->proto != PPP_LCP) 1727 goto illegal; 1728 if (h->ident != sp->lcp.echoid) { 1729 ++ifp->if_ierrors; 1730 break; 1731 } 1732 if (len < 8) { 1733 if (debug) 1734 addlog(SPP_FMT "lcp invalid echo reply " 1735 "packet length: %d bytes\n", 1736 SPP_ARGS(ifp), len); 1737 break; 1738 } 1739 if (debug) 1740 addlog(SPP_FMT "lcp got echo rep\n", 1741 SPP_ARGS(ifp)); 1742 memcpy(&u32, h + 1, sizeof u32); 1743 if (ntohl(u32) != sp->lcp.magic) 1744 sp->pp_alivecnt = 0; 1745 break; 1746 default: 1747 /* Unknown packet type -- send Code-Reject packet. */ 1748 illegal: 1749 if (debug) 1750 addlog(SPP_FMT "%s send code-rej for 0x%x\n", 1751 SPP_ARGS(ifp), cp->name, h->type); 1752 sppp_cp_send(sp, cp->proto, CODE_REJ, 1753 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 1754 ++ifp->if_ierrors; 1755 } 1756 } 1757 1758 1759 /* 1760 * The generic part of all Up/Down/Open/Close/TO event handlers. 1761 * Basically, the state transition handling in the automaton. 1762 */ 1763 static void 1764 sppp_up_event(const struct cp *cp, struct sppp *sp) 1765 { 1766 STDDCL; 1767 1768 if (debug) 1769 log(LOG_DEBUG, SPP_FMT "%s up(%s)\n", 1770 SPP_ARGS(ifp), cp->name, 1771 sppp_state_name(sp->state[cp->protoidx])); 1772 1773 switch (sp->state[cp->protoidx]) { 1774 case STATE_INITIAL: 1775 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1776 break; 1777 case STATE_STARTING: 1778 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1779 (cp->scr)(sp); 1780 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1781 break; 1782 default: 1783 printf(SPP_FMT "%s illegal up in state %s\n", 1784 SPP_ARGS(ifp), cp->name, 1785 sppp_state_name(sp->state[cp->protoidx])); 1786 } 1787 } 1788 1789 static void 1790 sppp_down_event(const struct cp *cp, struct sppp *sp) 1791 { 1792 STDDCL; 1793 1794 if (debug) 1795 log(LOG_DEBUG, SPP_FMT "%s down(%s)\n", 1796 SPP_ARGS(ifp), cp->name, 1797 sppp_state_name(sp->state[cp->protoidx])); 1798 1799 switch (sp->state[cp->protoidx]) { 1800 case STATE_CLOSED: 1801 case STATE_CLOSING: 1802 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1803 break; 1804 case STATE_STOPPED: 1805 (cp->tls)(sp); 1806 /* fall through */ 1807 case STATE_STOPPING: 1808 case STATE_REQ_SENT: 1809 case STATE_ACK_RCVD: 1810 case STATE_ACK_SENT: 1811 sppp_cp_change_state(cp, sp, STATE_STARTING); 1812 break; 1813 case STATE_OPENED: 1814 (cp->tld)(sp); 1815 sppp_cp_change_state(cp, sp, STATE_STARTING); 1816 break; 1817 default: 1818 printf(SPP_FMT "%s illegal down in state %s\n", 1819 SPP_ARGS(ifp), cp->name, 1820 sppp_state_name(sp->state[cp->protoidx])); 1821 } 1822 } 1823 1824 1825 static void 1826 sppp_open_event(const struct cp *cp, struct sppp *sp) 1827 { 1828 STDDCL; 1829 1830 if (debug) 1831 log(LOG_DEBUG, SPP_FMT "%s open(%s)\n", 1832 SPP_ARGS(ifp), cp->name, 1833 sppp_state_name(sp->state[cp->protoidx])); 1834 1835 switch (sp->state[cp->protoidx]) { 1836 case STATE_INITIAL: 1837 (cp->tls)(sp); 1838 sppp_cp_change_state(cp, sp, STATE_STARTING); 1839 break; 1840 case STATE_STARTING: 1841 break; 1842 case STATE_CLOSED: 1843 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1844 (cp->scr)(sp); 1845 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1846 break; 1847 case STATE_STOPPED: 1848 case STATE_STOPPING: 1849 case STATE_REQ_SENT: 1850 case STATE_ACK_RCVD: 1851 case STATE_ACK_SENT: 1852 case STATE_OPENED: 1853 break; 1854 case STATE_CLOSING: 1855 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1856 break; 1857 } 1858 } 1859 1860 1861 static void 1862 sppp_close_event(const struct cp *cp, struct sppp *sp) 1863 { 1864 STDDCL; 1865 1866 if (debug) 1867 log(LOG_DEBUG, SPP_FMT "%s close(%s)\n", 1868 SPP_ARGS(ifp), cp->name, 1869 sppp_state_name(sp->state[cp->protoidx])); 1870 1871 switch (sp->state[cp->protoidx]) { 1872 case STATE_INITIAL: 1873 case STATE_CLOSED: 1874 case STATE_CLOSING: 1875 break; 1876 case STATE_STARTING: 1877 (cp->tlf)(sp); 1878 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1879 break; 1880 case STATE_STOPPED: 1881 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1882 break; 1883 case STATE_STOPPING: 1884 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1885 break; 1886 case STATE_OPENED: 1887 (cp->tld)(sp); 1888 /* fall through */ 1889 case STATE_REQ_SENT: 1890 case STATE_ACK_RCVD: 1891 case STATE_ACK_SENT: 1892 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 1893 sppp_cp_send(sp, cp->proto, TERM_REQ, 1894 ++sp->pp_seq[cp->protoidx], 0, 0); 1895 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1896 break; 1897 } 1898 } 1899 1900 static void 1901 sppp_to_event(const struct cp *cp, struct sppp *sp) 1902 { 1903 STDDCL; 1904 int s; 1905 1906 s = splnet(); 1907 if (debug) 1908 log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n", 1909 SPP_ARGS(ifp), cp->name, 1910 sppp_state_name(sp->state[cp->protoidx]), 1911 sp->rst_counter[cp->protoidx]); 1912 1913 if (--sp->rst_counter[cp->protoidx] < 0) 1914 /* TO- event */ 1915 switch (sp->state[cp->protoidx]) { 1916 case STATE_CLOSING: 1917 (cp->tlf)(sp); 1918 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1919 sppp_lcp_check_and_close(sp); 1920 break; 1921 case STATE_STOPPING: 1922 (cp->tlf)(sp); 1923 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1924 sppp_lcp_check_and_close(sp); 1925 break; 1926 case STATE_REQ_SENT: 1927 case STATE_ACK_RCVD: 1928 case STATE_ACK_SENT: 1929 (cp->tlf)(sp); 1930 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1931 sppp_lcp_check_and_close(sp); 1932 break; 1933 } 1934 else 1935 /* TO+ event */ 1936 switch (sp->state[cp->protoidx]) { 1937 case STATE_CLOSING: 1938 case STATE_STOPPING: 1939 sppp_cp_send(sp, cp->proto, TERM_REQ, 1940 ++sp->pp_seq[cp->protoidx], 0, 0); 1941 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1942 cp->TO, sp); 1943 break; 1944 case STATE_REQ_SENT: 1945 case STATE_ACK_RCVD: 1946 (cp->scr)(sp); 1947 /* sppp_cp_change_state() will restart the timer */ 1948 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1949 break; 1950 case STATE_ACK_SENT: 1951 (cp->scr)(sp); 1952 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1953 cp->TO, sp); 1954 break; 1955 } 1956 1957 splx(s); 1958 } 1959 1960 /* 1961 * Change the state of a control protocol in the state automaton. 1962 * Takes care of starting/stopping the restart timer. 1963 */ 1964 void 1965 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 1966 { 1967 sp->state[cp->protoidx] = newstate; 1968 callout_stop(&sp->ch[cp->protoidx]); 1969 switch (newstate) { 1970 case STATE_INITIAL: 1971 case STATE_STARTING: 1972 case STATE_CLOSED: 1973 case STATE_STOPPED: 1974 case STATE_OPENED: 1975 break; 1976 case STATE_CLOSING: 1977 case STATE_STOPPING: 1978 case STATE_REQ_SENT: 1979 case STATE_ACK_RCVD: 1980 case STATE_ACK_SENT: 1981 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1982 cp->TO, sp); 1983 break; 1984 } 1985 } 1986 1987 /* 1988 *--------------------------------------------------------------------------* 1989 * * 1990 * The LCP implementation. * 1991 * * 1992 *--------------------------------------------------------------------------* 1993 */ 1994 static void 1995 sppp_lcp_init(struct sppp *sp) 1996 { 1997 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 1998 sp->lcp.magic = 0; 1999 sp->state[IDX_LCP] = STATE_INITIAL; 2000 sp->fail_counter[IDX_LCP] = 0; 2001 sp->pp_seq[IDX_LCP] = 0; 2002 sp->pp_rseq[IDX_LCP] = 0; 2003 sp->lcp.protos = 0; 2004 sp->lcp.mru = sp->lcp.their_mru = PP_MTU; 2005 2006 /* 2007 * Initialize counters and timeout values. Note that we don't 2008 * use the 3 seconds suggested in RFC 1661 since we are likely 2009 * running on a fast link. XXX We should probably implement 2010 * the exponential backoff option. Note that these values are 2011 * relevant for all control protocols, not just LCP only. 2012 */ 2013 sp->lcp.timeout = 1 * hz; 2014 sp->lcp.max_terminate = 2; 2015 sp->lcp.max_configure = 10; 2016 sp->lcp.max_failure = 10; 2017 callout_init(&sp->ch[IDX_LCP]); 2018 } 2019 2020 static void 2021 sppp_lcp_up(struct sppp *sp) 2022 { 2023 STDDCL; 2024 2025 /* Initialize activity timestamp: opening a connection is an activity */ 2026 sp->pp_last_activity = time.tv_sec; 2027 2028 /* 2029 * If this interface is passive or dial-on-demand, and we are 2030 * still in Initial state, it means we've got an incoming 2031 * call. Activate the interface. 2032 */ 2033 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2034 if (debug) 2035 log(LOG_DEBUG, 2036 SPP_FMT "Up event", SPP_ARGS(ifp)); 2037 ifp->if_flags |= IFF_RUNNING; 2038 if (sp->state[IDX_LCP] == STATE_INITIAL) { 2039 if (debug) 2040 addlog("(incoming call)\n"); 2041 sp->pp_flags |= PP_CALLIN; 2042 lcp.Open(sp); 2043 } else if (debug) 2044 addlog("\n"); 2045 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 && 2046 (sp->state[IDX_LCP] == STATE_INITIAL)) { 2047 ifp->if_flags |= IFF_RUNNING; 2048 lcp.Open(sp); 2049 } 2050 2051 sppp_up_event(&lcp, sp); 2052 } 2053 2054 static void 2055 sppp_lcp_down(struct sppp *sp) 2056 { 2057 STDDCL; 2058 2059 sppp_down_event(&lcp, sp); 2060 2061 /* 2062 * If this is neither a dial-on-demand nor a passive 2063 * interface, simulate an ``ifconfig down'' action, so the 2064 * administrator can force a redial by another ``ifconfig 2065 * up''. XXX For leased line operation, should we immediately 2066 * try to reopen the connection here? 2067 */ 2068 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2069 log(LOG_INFO, 2070 SPP_FMT "Down event (carrier loss), taking interface down.\n", 2071 SPP_ARGS(ifp)); 2072 if_down(ifp); 2073 } else { 2074 if (debug) 2075 log(LOG_DEBUG, 2076 SPP_FMT "Down event (carrier loss)\n", 2077 SPP_ARGS(ifp)); 2078 } 2079 sp->pp_flags &= ~PP_CALLIN; 2080 if (sp->state[IDX_LCP] != STATE_INITIAL) 2081 lcp.Close(sp); 2082 ifp->if_flags &= ~IFF_RUNNING; 2083 } 2084 2085 static void 2086 sppp_lcp_open(struct sppp *sp) 2087 { 2088 /* 2089 * If we are authenticator, negotiate LCP_AUTH 2090 */ 2091 if (sp->hisauth.proto != 0) 2092 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2093 else 2094 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2095 sp->pp_flags &= ~PP_NEEDAUTH; 2096 sppp_open_event(&lcp, sp); 2097 } 2098 2099 static void 2100 sppp_lcp_close(struct sppp *sp) 2101 { 2102 sppp_close_event(&lcp, sp); 2103 } 2104 2105 static void 2106 sppp_lcp_TO(void *cookie) 2107 { 2108 sppp_to_event(&lcp, (struct sppp *)cookie); 2109 } 2110 2111 /* 2112 * Analyze a configure request. Return true if it was agreeable, and 2113 * caused action sca, false if it has been rejected or nak'ed, and 2114 * caused action scn. (The return value is used to make the state 2115 * transition decision in the state automaton.) 2116 */ 2117 static int 2118 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2119 { 2120 STDDCL; 2121 u_char *buf, *r, *p; 2122 int origlen, rlen; 2123 u_int32_t nmagic; 2124 u_short authproto; 2125 2126 len -= 4; 2127 origlen = len; 2128 buf = r = malloc (len, M_TEMP, M_NOWAIT); 2129 if (! buf) 2130 return (0); 2131 2132 if (debug) 2133 log(LOG_DEBUG, SPP_FMT "lcp parse opts:", 2134 SPP_ARGS(ifp)); 2135 2136 /* pass 1: check for things that need to be rejected */ 2137 p = (void*) (h+1); 2138 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2139 if (debug) 2140 addlog(" %s", sppp_lcp_opt_name(*p)); 2141 switch (*p) { 2142 case LCP_OPT_MAGIC: 2143 /* Magic number. */ 2144 /* fall through, both are same length */ 2145 case LCP_OPT_ASYNC_MAP: 2146 /* Async control character map. */ 2147 if (len >= 6 || p[1] == 6) 2148 continue; 2149 if (debug) 2150 addlog(" [invalid]"); 2151 break; 2152 case LCP_OPT_MRU: 2153 /* Maximum receive unit. */ 2154 if (len >= 4 && p[1] == 4) 2155 continue; 2156 if (debug) 2157 addlog(" [invalid]"); 2158 break; 2159 case LCP_OPT_AUTH_PROTO: 2160 if (len < 4) { 2161 if (debug) 2162 addlog(" [invalid]"); 2163 break; 2164 } 2165 authproto = (p[2] << 8) + p[3]; 2166 if (authproto == PPP_CHAP && p[1] != 5) { 2167 if (debug) 2168 addlog(" [invalid chap len]"); 2169 break; 2170 } 2171 if (sp->myauth.proto == 0) { 2172 /* we are not configured to do auth */ 2173 if (debug) 2174 addlog(" [not configured]"); 2175 break; 2176 } 2177 /* 2178 * Remote want us to authenticate, remember this, 2179 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2180 * up. 2181 */ 2182 sp->pp_flags |= PP_NEEDAUTH; 2183 continue; 2184 default: 2185 /* Others not supported. */ 2186 if (debug) 2187 addlog(" [rej]"); 2188 break; 2189 } 2190 /* Add the option to rejected list. */ 2191 bcopy (p, r, p[1]); 2192 r += p[1]; 2193 rlen += p[1]; 2194 } 2195 if (rlen) { 2196 if (debug) 2197 addlog(" send conf-rej\n"); 2198 sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2199 goto end; 2200 } else if (debug) 2201 addlog("\n"); 2202 2203 /* 2204 * pass 2: check for option values that are unacceptable and 2205 * thus require to be nak'ed. 2206 */ 2207 if (debug) 2208 log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ", 2209 SPP_ARGS(ifp)); 2210 2211 p = (void*) (h+1); 2212 len = origlen; 2213 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2214 if (debug) 2215 addlog(" %s", sppp_lcp_opt_name(*p)); 2216 switch (*p) { 2217 case LCP_OPT_MAGIC: 2218 /* Magic number -- extract. */ 2219 nmagic = (u_int32_t)p[2] << 24 | 2220 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2221 if (nmagic != sp->lcp.magic) { 2222 if (debug) 2223 addlog(" 0x%x", nmagic); 2224 continue; 2225 } 2226 /* 2227 * Local and remote magics equal -- loopback? 2228 */ 2229 if (sp->pp_loopcnt >= MAXALIVECNT*5) { 2230 printf (SPP_FMT "loopback\n", 2231 SPP_ARGS(ifp)); 2232 sp->pp_loopcnt = 0; 2233 if (ifp->if_flags & IFF_UP) { 2234 if_down(ifp); 2235 IF_PURGE(&sp->pp_cpq); 2236 /* XXX ? */ 2237 lcp.Down(sp); 2238 lcp.Up(sp); 2239 } 2240 } else if (debug) 2241 addlog(" [glitch]"); 2242 ++sp->pp_loopcnt; 2243 /* 2244 * We negate our magic here, and NAK it. If 2245 * we see it later in an NAK packet, we 2246 * suggest a new one. 2247 */ 2248 nmagic = ~sp->lcp.magic; 2249 /* Gonna NAK it. */ 2250 p[2] = nmagic >> 24; 2251 p[3] = nmagic >> 16; 2252 p[4] = nmagic >> 8; 2253 p[5] = nmagic; 2254 break; 2255 2256 case LCP_OPT_ASYNC_MAP: 2257 /* Async control character map -- check to be zero. */ 2258 if (! p[2] && ! p[3] && ! p[4] && ! p[5]) { 2259 if (debug) 2260 addlog(" [empty]"); 2261 continue; 2262 } 2263 if (debug) 2264 addlog(" [non-empty]"); 2265 /* suggest a zero one */ 2266 p[2] = p[3] = p[4] = p[5] = 0; 2267 break; 2268 2269 case LCP_OPT_MRU: 2270 /* 2271 * Maximum receive unit. Always agreeable, 2272 * but ignored by now. 2273 */ 2274 sp->lcp.their_mru = p[2] * 256 + p[3]; 2275 if (debug) 2276 addlog(" %ld", sp->lcp.their_mru); 2277 continue; 2278 2279 case LCP_OPT_AUTH_PROTO: 2280 authproto = (p[2] << 8) + p[3]; 2281 if (sp->myauth.proto != authproto) { 2282 /* not agreed, nak */ 2283 if (debug) 2284 addlog(" [mine %s != his %s]", 2285 sppp_proto_name(sp->hisauth.proto), 2286 sppp_proto_name(authproto)); 2287 p[2] = sp->myauth.proto >> 8; 2288 p[3] = sp->myauth.proto; 2289 break; 2290 } 2291 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2292 if (debug) 2293 addlog(" [chap not MD5]"); 2294 p[4] = CHAP_MD5; 2295 break; 2296 } 2297 continue; 2298 } 2299 /* Add the option to nak'ed list. */ 2300 bcopy (p, r, p[1]); 2301 r += p[1]; 2302 rlen += p[1]; 2303 } 2304 if (rlen) { 2305 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2306 if (debug) 2307 addlog(" max_failure (%d) exceeded, " 2308 "send conf-rej\n", 2309 sp->lcp.max_failure); 2310 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2311 } else { 2312 if (debug) 2313 addlog(" send conf-nak\n"); 2314 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2315 } 2316 goto end; 2317 } else { 2318 if (debug) 2319 addlog(" send conf-ack\n"); 2320 sp->fail_counter[IDX_LCP] = 0; 2321 sp->pp_loopcnt = 0; 2322 sppp_cp_send (sp, PPP_LCP, CONF_ACK, 2323 h->ident, origlen, h+1); 2324 } 2325 2326 end: 2327 free (buf, M_TEMP); 2328 return (rlen == 0); 2329 } 2330 2331 /* 2332 * Analyze the LCP Configure-Reject option list, and adjust our 2333 * negotiation. 2334 */ 2335 static void 2336 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2337 { 2338 STDDCL; 2339 u_char *buf, *p; 2340 2341 len -= 4; 2342 buf = malloc (len, M_TEMP, M_NOWAIT); 2343 if (!buf) 2344 return; 2345 2346 if (debug) 2347 log(LOG_DEBUG, SPP_FMT "lcp rej opts:", 2348 SPP_ARGS(ifp)); 2349 2350 p = (void*) (h+1); 2351 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2352 if (debug) 2353 addlog(" %s", sppp_lcp_opt_name(*p)); 2354 switch (*p) { 2355 case LCP_OPT_MAGIC: 2356 /* Magic number -- can't use it, use 0 */ 2357 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2358 sp->lcp.magic = 0; 2359 break; 2360 case LCP_OPT_MRU: 2361 /* 2362 * Should not be rejected anyway, since we only 2363 * negotiate a MRU if explicitly requested by 2364 * peer. 2365 */ 2366 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2367 break; 2368 case LCP_OPT_AUTH_PROTO: 2369 /* 2370 * Peer doesn't want to authenticate himself, 2371 * deny unless this is a dialout call, and 2372 * SPPP_AUTHFLAG_NOCALLOUT is set. 2373 */ 2374 if ((sp->pp_flags & PP_CALLIN) == 0 && 2375 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2376 if (debug) 2377 addlog(" [don't insist on auth " 2378 "for callout]"); 2379 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2380 break; 2381 } 2382 if (debug) 2383 addlog("[access denied]\n"); 2384 lcp.Close(sp); 2385 break; 2386 } 2387 } 2388 if (debug) 2389 addlog("\n"); 2390 free (buf, M_TEMP); 2391 return; 2392 } 2393 2394 /* 2395 * Analyze the LCP Configure-NAK option list, and adjust our 2396 * negotiation. 2397 */ 2398 static void 2399 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2400 { 2401 STDDCL; 2402 u_char *buf, *p; 2403 u_int32_t magic; 2404 2405 len -= 4; 2406 buf = malloc (len, M_TEMP, M_NOWAIT); 2407 if (!buf) 2408 return; 2409 2410 if (debug) 2411 log(LOG_DEBUG, SPP_FMT "lcp nak opts:", 2412 SPP_ARGS(ifp)); 2413 2414 p = (void*) (h+1); 2415 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2416 if (debug) 2417 addlog(" %s", sppp_lcp_opt_name(*p)); 2418 switch (*p) { 2419 case LCP_OPT_MAGIC: 2420 /* Magic number -- renegotiate */ 2421 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2422 len >= 6 && p[1] == 6) { 2423 magic = (u_int32_t)p[2] << 24 | 2424 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2425 /* 2426 * If the remote magic is our negated one, 2427 * this looks like a loopback problem. 2428 * Suggest a new magic to make sure. 2429 */ 2430 if (magic == ~sp->lcp.magic) { 2431 if (debug) 2432 addlog(" magic glitch"); 2433 sp->lcp.magic = random(); 2434 } else { 2435 sp->lcp.magic = magic; 2436 if (debug) 2437 addlog(" %d", magic); 2438 } 2439 } 2440 break; 2441 case LCP_OPT_MRU: 2442 /* 2443 * Peer wants to advise us to negotiate an MRU. 2444 * Agree on it if it's reasonable, or use 2445 * default otherwise. 2446 */ 2447 if (len >= 4 && p[1] == 4) { 2448 u_int mru = p[2] * 256 + p[3]; 2449 if (debug) 2450 addlog(" %d", mru); 2451 if (mru < PP_MTU || mru > PP_MAX_MRU) 2452 mru = PP_MTU; 2453 sp->lcp.mru = mru; 2454 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2455 } 2456 break; 2457 case LCP_OPT_AUTH_PROTO: 2458 /* 2459 * Peer doesn't like our authentication method, 2460 * deny. 2461 */ 2462 if (debug) 2463 addlog("[access denied]\n"); 2464 lcp.Close(sp); 2465 break; 2466 } 2467 } 2468 if (debug) 2469 addlog("\n"); 2470 free (buf, M_TEMP); 2471 return; 2472 } 2473 2474 static void 2475 sppp_lcp_tlu(struct sppp *sp) 2476 { 2477 STDDCL; 2478 int i; 2479 u_int32_t mask; 2480 2481 /* XXX ? */ 2482 if (! (ifp->if_flags & IFF_UP) && 2483 (ifp->if_flags & IFF_RUNNING)) { 2484 /* Coming out of loopback mode. */ 2485 if_up(ifp); 2486 } 2487 2488 for (i = 0; i < IDX_COUNT; i++) 2489 if ((cps[i])->flags & CP_QUAL) 2490 (cps[i])->Open(sp); 2491 2492 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2493 (sp->pp_flags & PP_NEEDAUTH) != 0) 2494 sp->pp_phase = SPPP_PHASE_AUTHENTICATE; 2495 else 2496 sp->pp_phase = SPPP_PHASE_NETWORK; 2497 2498 if(debug) 2499 { 2500 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2501 sppp_phase_name(sp->pp_phase)); 2502 } 2503 2504 /* 2505 * Open all authentication protocols. This is even required 2506 * if we already proceeded to network phase, since it might be 2507 * that remote wants us to authenticate, so we might have to 2508 * send a PAP request. Undesired authentication protocols 2509 * don't do anything when they get an Open event. 2510 */ 2511 for (i = 0; i < IDX_COUNT; i++) 2512 if ((cps[i])->flags & CP_AUTH) 2513 (cps[i])->Open(sp); 2514 2515 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2516 /* Notify all NCPs. */ 2517 for (i = 0; i < IDX_COUNT; i++) 2518 if ((cps[i])->flags & CP_NCP) 2519 (cps[i])->Open(sp); 2520 } 2521 2522 /* Send Up events to all started protos. */ 2523 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2524 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) 2525 (cps[i])->Up(sp); 2526 2527 /* notify low-level driver of state change */ 2528 if (sp->pp_chg) 2529 sp->pp_chg(sp, (int)sp->pp_phase); 2530 2531 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2532 /* if no NCP is starting, close down */ 2533 sppp_lcp_check_and_close(sp); 2534 } 2535 2536 static void 2537 sppp_lcp_tld(struct sppp *sp) 2538 { 2539 STDDCL; 2540 int i; 2541 u_int32_t mask; 2542 2543 sp->pp_phase = SPPP_PHASE_TERMINATE; 2544 2545 if(debug) 2546 { 2547 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2548 sppp_phase_name(sp->pp_phase)); 2549 } 2550 2551 /* 2552 * Take upper layers down. We send the Down event first and 2553 * the Close second to prevent the upper layers from sending 2554 * ``a flurry of terminate-request packets'', as the RFC 2555 * describes it. 2556 */ 2557 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2558 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2559 (cps[i])->Down(sp); 2560 (cps[i])->Close(sp); 2561 } 2562 } 2563 2564 static void 2565 sppp_lcp_tls(struct sppp *sp) 2566 { 2567 STDDCL; 2568 2569 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2570 printf("%s: authentication failed %d times, not retrying again\n", 2571 sp->pp_if.if_xname, sp->pp_auth_failures); 2572 if_down(&sp->pp_if); 2573 return; 2574 } 2575 2576 sp->pp_phase = SPPP_PHASE_ESTABLISH; 2577 2578 if(debug) 2579 { 2580 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2581 sppp_phase_name(sp->pp_phase)); 2582 } 2583 2584 /* Notify lower layer if desired. */ 2585 if (sp->pp_tls) 2586 (sp->pp_tls)(sp); 2587 } 2588 2589 static void 2590 sppp_lcp_tlf(struct sppp *sp) 2591 { 2592 STDDCL; 2593 2594 sp->pp_phase = SPPP_PHASE_DEAD; 2595 2596 if(debug) 2597 { 2598 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2599 sppp_phase_name(sp->pp_phase)); 2600 } 2601 2602 /* Notify lower layer if desired. */ 2603 if (sp->pp_tlf) 2604 (sp->pp_tlf)(sp); 2605 } 2606 2607 static void 2608 sppp_lcp_scr(struct sppp *sp) 2609 { 2610 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2611 int i = 0; 2612 u_short authproto; 2613 2614 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2615 if (! sp->lcp.magic) 2616 sp->lcp.magic = random(); 2617 opt[i++] = LCP_OPT_MAGIC; 2618 opt[i++] = 6; 2619 opt[i++] = sp->lcp.magic >> 24; 2620 opt[i++] = sp->lcp.magic >> 16; 2621 opt[i++] = sp->lcp.magic >> 8; 2622 opt[i++] = sp->lcp.magic; 2623 } 2624 2625 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2626 opt[i++] = LCP_OPT_MRU; 2627 opt[i++] = 4; 2628 opt[i++] = sp->lcp.mru >> 8; 2629 opt[i++] = sp->lcp.mru; 2630 } 2631 2632 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2633 authproto = sp->hisauth.proto; 2634 opt[i++] = LCP_OPT_AUTH_PROTO; 2635 opt[i++] = authproto == PPP_CHAP? 5: 4; 2636 opt[i++] = authproto >> 8; 2637 opt[i++] = authproto; 2638 if (authproto == PPP_CHAP) 2639 opt[i++] = CHAP_MD5; 2640 } 2641 2642 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2643 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2644 } 2645 2646 /* 2647 * Check the open NCPs, return true if at least one NCP is open. 2648 */ 2649 static int 2650 sppp_ncp_check(struct sppp *sp) 2651 { 2652 int i, mask; 2653 2654 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2655 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2656 return 1; 2657 return 0; 2658 } 2659 2660 /* 2661 * Re-check the open NCPs and see if we should terminate the link. 2662 * Called by the NCPs during their tlf action handling. 2663 */ 2664 static void 2665 sppp_lcp_check_and_close(struct sppp *sp) 2666 { 2667 2668 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2669 /* don't bother, we are already going down */ 2670 return; 2671 2672 if (sppp_ncp_check(sp)) 2673 return; 2674 2675 lcp.Close(sp); 2676 } 2677 2678 2679 /* 2680 *--------------------------------------------------------------------------* 2681 * * 2682 * The IPCP implementation. * 2683 * * 2684 *--------------------------------------------------------------------------* 2685 */ 2686 2687 static void 2688 sppp_ipcp_init(struct sppp *sp) 2689 { 2690 sp->ipcp.opts = 0; 2691 sp->ipcp.flags = 0; 2692 sp->state[IDX_IPCP] = STATE_INITIAL; 2693 sp->fail_counter[IDX_IPCP] = 0; 2694 sp->pp_seq[IDX_IPCP] = 0; 2695 sp->pp_rseq[IDX_IPCP] = 0; 2696 callout_init(&sp->ch[IDX_IPCP]); 2697 } 2698 2699 static void 2700 sppp_ipcp_up(struct sppp *sp) 2701 { 2702 sppp_up_event(&ipcp, sp); 2703 } 2704 2705 static void 2706 sppp_ipcp_down(struct sppp *sp) 2707 { 2708 sppp_down_event(&ipcp, sp); 2709 } 2710 2711 static void 2712 sppp_ipcp_open(struct sppp *sp) 2713 { 2714 STDDCL; 2715 u_int32_t myaddr, hisaddr; 2716 2717 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 2718 sp->ipcp.req_myaddr = 0; 2719 sp->ipcp.req_hisaddr = 0; 2720 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 2721 2722 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 2723 /* 2724 * If we don't have his address, this probably means our 2725 * interface doesn't want to talk IP at all. (This could 2726 * be the case if somebody wants to speak only IPX, for 2727 * example.) Don't open IPCP in this case. 2728 */ 2729 if (hisaddr == 0L) { 2730 /* XXX this message should go away */ 2731 if (debug) 2732 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n", 2733 SPP_ARGS(ifp)); 2734 return; 2735 } 2736 2737 if (myaddr == 0) { 2738 /* 2739 * I don't have an assigned address, so i need to 2740 * negotiate my address. 2741 */ 2742 sp->ipcp.flags |= IPCP_MYADDR_DYN; 2743 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 2744 } 2745 if (hisaddr == 1) { 2746 /* 2747 * XXX - remove this hack! 2748 * remote has no valid adress, we need to get one assigned. 2749 */ 2750 sp->ipcp.flags |= IPCP_HISADDR_DYN; 2751 } 2752 sppp_open_event(&ipcp, sp); 2753 } 2754 2755 static void 2756 sppp_ipcp_close(struct sppp *sp) 2757 { 2758 sppp_close_event(&ipcp, sp); 2759 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 2760 /* 2761 * Some address was dynamic, clear it again. 2762 */ 2763 sppp_clear_ip_addrs(sp); 2764 } 2765 2766 static void 2767 sppp_ipcp_TO(void *cookie) 2768 { 2769 sppp_to_event(&ipcp, (struct sppp *)cookie); 2770 } 2771 2772 /* 2773 * Analyze a configure request. Return true if it was agreeable, and 2774 * caused action sca, false if it has been rejected or nak'ed, and 2775 * caused action scn. (The return value is used to make the state 2776 * transition decision in the state automaton.) 2777 */ 2778 static int 2779 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2780 { 2781 u_char *buf, *r, *p; 2782 struct ifnet *ifp = &sp->pp_if; 2783 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 2784 u_int32_t hisaddr, desiredaddr; 2785 2786 len -= 4; 2787 origlen = len; 2788 /* 2789 * Make sure to allocate a buf that can at least hold a 2790 * conf-nak with an `address' option. We might need it below. 2791 */ 2792 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 2793 if (! buf) 2794 return (0); 2795 2796 /* pass 1: see if we can recognize them */ 2797 if (debug) 2798 log(LOG_DEBUG, SPP_FMT "ipcp parse opts:", 2799 SPP_ARGS(ifp)); 2800 p = (void*) (h+1); 2801 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2802 if (debug) 2803 addlog(" %s", sppp_ipcp_opt_name(*p)); 2804 switch (*p) { 2805 #ifdef notyet 2806 case IPCP_OPT_COMPRESSION: 2807 if (len >= 6 && p[1] >= 6) { 2808 /* correctly formed compress option */ 2809 continue; 2810 } 2811 if (debug) 2812 addlog(" [invalid]"); 2813 break; 2814 #endif 2815 case IPCP_OPT_ADDRESS: 2816 if (len >= 6 && p[1] == 6) { 2817 /* correctly formed address option */ 2818 continue; 2819 } 2820 if (debug) 2821 addlog(" [invalid]"); 2822 break; 2823 default: 2824 /* Others not supported. */ 2825 if (debug) 2826 addlog(" [rej]"); 2827 break; 2828 } 2829 /* Add the option to rejected list. */ 2830 bcopy (p, r, p[1]); 2831 r += p[1]; 2832 rlen += p[1]; 2833 } 2834 if (rlen) { 2835 if (debug) 2836 addlog(" send conf-rej\n"); 2837 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 2838 goto end; 2839 } else if (debug) 2840 addlog("\n"); 2841 2842 /* pass 2: parse option values */ 2843 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 2844 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 2845 else 2846 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 2847 if (debug) 2848 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ", 2849 SPP_ARGS(ifp)); 2850 p = (void*) (h+1); 2851 len = origlen; 2852 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2853 if (debug) 2854 addlog(" %s", sppp_ipcp_opt_name(*p)); 2855 switch (*p) { 2856 #ifdef notyet 2857 case IPCP_OPT_COMPRESSION: 2858 continue; 2859 #endif 2860 case IPCP_OPT_ADDRESS: 2861 desiredaddr = p[2] << 24 | p[3] << 16 | 2862 p[4] << 8 | p[5]; 2863 if (desiredaddr == hisaddr || 2864 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 2865 /* 2866 * Peer's address is same as our value, 2867 * this is agreeable. Gonna conf-ack 2868 * it. 2869 */ 2870 if (debug) 2871 addlog(" %s [ack]", 2872 sppp_dotted_quad(hisaddr)); 2873 /* record that we've seen it already */ 2874 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 2875 sp->ipcp.req_hisaddr = desiredaddr; 2876 hisaddr = desiredaddr; 2877 continue; 2878 } 2879 /* 2880 * The address wasn't agreeable. This is either 2881 * he sent us 0.0.0.0, asking to assign him an 2882 * address, or he send us another address not 2883 * matching our value. Either case, we gonna 2884 * conf-nak it with our value. 2885 */ 2886 if (debug) { 2887 if (desiredaddr == 0) 2888 addlog(" [addr requested]"); 2889 else 2890 addlog(" %s [not agreed]", 2891 sppp_dotted_quad(desiredaddr)); 2892 } 2893 2894 p[2] = hisaddr >> 24; 2895 p[3] = hisaddr >> 16; 2896 p[4] = hisaddr >> 8; 2897 p[5] = hisaddr; 2898 break; 2899 } 2900 /* Add the option to nak'ed list. */ 2901 bcopy (p, r, p[1]); 2902 r += p[1]; 2903 rlen += p[1]; 2904 } 2905 2906 /* 2907 * If we are about to conf-ack the request, but haven't seen 2908 * his address so far, gonna conf-nak it instead, with the 2909 * `address' option present and our idea of his address being 2910 * filled in there, to request negotiation of both addresses. 2911 * 2912 * XXX This can result in an endless req - nak loop if peer 2913 * doesn't want to send us his address. Q: What should we do 2914 * about it? XXX A: implement the max-failure counter. 2915 */ 2916 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 2917 buf[0] = IPCP_OPT_ADDRESS; 2918 buf[1] = 6; 2919 buf[2] = hisaddr >> 24; 2920 buf[3] = hisaddr >> 16; 2921 buf[4] = hisaddr >> 8; 2922 buf[5] = hisaddr; 2923 rlen = 6; 2924 if (debug) 2925 addlog(" still need hisaddr"); 2926 } 2927 2928 if (rlen) { 2929 if (debug) 2930 addlog(" send conf-nak\n"); 2931 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 2932 } else { 2933 if (debug) 2934 addlog(" send conf-ack\n"); 2935 sppp_cp_send (sp, PPP_IPCP, CONF_ACK, 2936 h->ident, origlen, h+1); 2937 } 2938 2939 end: 2940 free (buf, M_TEMP); 2941 return (rlen == 0); 2942 } 2943 2944 /* 2945 * Analyze the IPCP Configure-Reject option list, and adjust our 2946 * negotiation. 2947 */ 2948 static void 2949 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2950 { 2951 u_char *buf, *p; 2952 struct ifnet *ifp = &sp->pp_if; 2953 int debug = ifp->if_flags & IFF_DEBUG; 2954 2955 len -= 4; 2956 buf = malloc (len, M_TEMP, M_NOWAIT); 2957 if (!buf) 2958 return; 2959 2960 if (debug) 2961 log(LOG_DEBUG, SPP_FMT "ipcp rej opts:", 2962 SPP_ARGS(ifp)); 2963 2964 p = (void*) (h+1); 2965 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2966 if (debug) 2967 addlog(" %s", sppp_ipcp_opt_name(*p)); 2968 switch (*p) { 2969 case IPCP_OPT_ADDRESS: 2970 /* 2971 * Peer doesn't grok address option. This is 2972 * bad. XXX Should we better give up here? 2973 */ 2974 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 2975 break; 2976 #ifdef notyet 2977 case IPCP_OPT_COMPRESS: 2978 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 2979 break; 2980 #endif 2981 } 2982 } 2983 if (debug) 2984 addlog("\n"); 2985 free (buf, M_TEMP); 2986 return; 2987 } 2988 2989 /* 2990 * Analyze the IPCP Configure-NAK option list, and adjust our 2991 * negotiation. 2992 */ 2993 static void 2994 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2995 { 2996 u_char *p; 2997 struct ifnet *ifp = &sp->pp_if; 2998 int debug = ifp->if_flags & IFF_DEBUG; 2999 u_int32_t wantaddr; 3000 3001 len -= 4; 3002 3003 if (debug) 3004 log(LOG_DEBUG, SPP_FMT "ipcp nak opts:", 3005 SPP_ARGS(ifp)); 3006 3007 p = (void*) (h+1); 3008 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3009 if (debug) 3010 addlog(" %s", sppp_ipcp_opt_name(*p)); 3011 switch (*p) { 3012 case IPCP_OPT_ADDRESS: 3013 /* 3014 * Peer doesn't like our local IP address. See 3015 * if we can do something for him. We'll drop 3016 * him our address then. 3017 */ 3018 if (len >= 6 && p[1] == 6) { 3019 wantaddr = p[2] << 24 | p[3] << 16 | 3020 p[4] << 8 | p[5]; 3021 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3022 if (debug) 3023 addlog(" [wantaddr %s]", 3024 sppp_dotted_quad(wantaddr)); 3025 /* 3026 * When doing dynamic address assignment, 3027 * we accept his offer. Otherwise, we 3028 * ignore it and thus continue to negotiate 3029 * our already existing value. 3030 */ 3031 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3032 if (debug) 3033 addlog(" [agree]"); 3034 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3035 sp->ipcp.req_myaddr = wantaddr; 3036 } 3037 } 3038 break; 3039 3040 case IPCP_OPT_PRIMDNS: 3041 if (len >= 6 && p[1] == 6) { 3042 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3043 p[4] << 8 | p[5]; 3044 } 3045 break; 3046 3047 case IPCP_OPT_SECDNS: 3048 if (len >= 6 && p[1] == 6) { 3049 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3050 p[4] << 8 | p[5]; 3051 } 3052 break; 3053 #ifdef notyet 3054 case IPCP_OPT_COMPRESS: 3055 /* 3056 * Peer wants different compression parameters. 3057 */ 3058 break; 3059 #endif 3060 } 3061 } 3062 if (debug) 3063 addlog("\n"); 3064 return; 3065 } 3066 3067 static void 3068 sppp_ipcp_tlu(struct sppp *sp) 3069 { 3070 /* we are up. Set addresses and notify anyone interested */ 3071 u_int32_t myaddr, hisaddr; 3072 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3073 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 3074 myaddr = sp->ipcp.req_myaddr; 3075 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 3076 hisaddr = sp->ipcp.req_hisaddr; 3077 sppp_set_ip_addrs(sp, myaddr, hisaddr); 3078 if (sp->pp_con) 3079 sp->pp_con(sp); 3080 } 3081 3082 static void 3083 sppp_ipcp_tld(struct sppp *sp) 3084 { 3085 } 3086 3087 static void 3088 sppp_ipcp_tls(struct sppp *sp) 3089 { 3090 /* indicate to LCP that it must stay alive */ 3091 sp->lcp.protos |= (1 << IDX_IPCP); 3092 } 3093 3094 static void 3095 sppp_ipcp_tlf(struct sppp *sp) 3096 { 3097 /* we no longer need LCP */ 3098 sp->lcp.protos &= ~(1 << IDX_IPCP); 3099 } 3100 3101 static void 3102 sppp_ipcp_scr(struct sppp *sp) 3103 { 3104 char opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3105 u_int32_t ouraddr; 3106 int i = 0; 3107 3108 #ifdef notyet 3109 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3110 opt[i++] = IPCP_OPT_COMPRESSION; 3111 opt[i++] = 6; 3112 opt[i++] = 0; /* VJ header compression */ 3113 opt[i++] = 0x2d; /* VJ header compression */ 3114 opt[i++] = max_slot_id; 3115 opt[i++] = comp_slot_id; 3116 } 3117 #endif 3118 3119 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3120 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3121 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3122 else 3123 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3124 opt[i++] = IPCP_OPT_ADDRESS; 3125 opt[i++] = 6; 3126 opt[i++] = ouraddr >> 24; 3127 opt[i++] = ouraddr >> 16; 3128 opt[i++] = ouraddr >> 8; 3129 opt[i++] = ouraddr; 3130 } 3131 3132 if (sp->query_dns & 1) { 3133 opt[i++] = IPCP_OPT_PRIMDNS; 3134 opt[i++] = 6; 3135 opt[i++] = sp->dns_addrs[0] >> 24; 3136 opt[i++] = sp->dns_addrs[0] >> 16; 3137 opt[i++] = sp->dns_addrs[0] >> 8; 3138 opt[i++] = sp->dns_addrs[0]; 3139 } 3140 if (sp->query_dns & 2) { 3141 opt[i++] = IPCP_OPT_SECDNS; 3142 opt[i++] = 6; 3143 opt[i++] = sp->dns_addrs[1] >> 24; 3144 opt[i++] = sp->dns_addrs[1] >> 16; 3145 opt[i++] = sp->dns_addrs[1] >> 8; 3146 opt[i++] = sp->dns_addrs[1]; 3147 } 3148 3149 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3150 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3151 } 3152 3153 3154 /* 3155 *--------------------------------------------------------------------------* 3156 * * 3157 * The IPv6CP implementation. * 3158 * * 3159 *--------------------------------------------------------------------------* 3160 */ 3161 3162 #ifdef INET6 3163 static void 3164 sppp_ipv6cp_init(struct sppp *sp) 3165 { 3166 sp->ipv6cp.opts = 0; 3167 sp->ipv6cp.flags = 0; 3168 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3169 sp->fail_counter[IDX_IPV6CP] = 0; 3170 sp->pp_seq[IDX_IPV6CP] = 0; 3171 sp->pp_rseq[IDX_IPV6CP] = 0; 3172 callout_init(&sp->ch[IDX_IPV6CP]); 3173 } 3174 3175 static void 3176 sppp_ipv6cp_up(struct sppp *sp) 3177 { 3178 sppp_up_event(&ipv6cp, sp); 3179 } 3180 3181 static void 3182 sppp_ipv6cp_down(struct sppp *sp) 3183 { 3184 sppp_down_event(&ipv6cp, sp); 3185 } 3186 3187 static void 3188 sppp_ipv6cp_open(struct sppp *sp) 3189 { 3190 STDDCL; 3191 struct in6_addr myaddr, hisaddr; 3192 3193 #ifdef IPV6CP_MYIFID_DYN 3194 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3195 #else 3196 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3197 #endif 3198 3199 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3200 /* 3201 * If we don't have our address, this probably means our 3202 * interface doesn't want to talk IPv6 at all. (This could 3203 * be the case if somebody wants to speak only IPX, for 3204 * example.) Don't open IPv6CP in this case. 3205 */ 3206 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3207 /* XXX this message should go away */ 3208 if (debug) 3209 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n", 3210 SPP_ARGS(ifp)); 3211 return; 3212 } 3213 3214 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3215 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3216 sppp_open_event(&ipv6cp, sp); 3217 } 3218 3219 static void 3220 sppp_ipv6cp_close(struct sppp *sp) 3221 { 3222 sppp_close_event(&ipv6cp, sp); 3223 } 3224 3225 static void 3226 sppp_ipv6cp_TO(void *cookie) 3227 { 3228 sppp_to_event(&ipv6cp, (struct sppp *)cookie); 3229 } 3230 3231 /* 3232 * Analyze a configure request. Return true if it was agreeable, and 3233 * caused action sca, false if it has been rejected or nak'ed, and 3234 * caused action scn. (The return value is used to make the state 3235 * transition decision in the state automaton.) 3236 */ 3237 static int 3238 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3239 { 3240 u_char *buf, *r, *p; 3241 struct ifnet *ifp = &sp->pp_if; 3242 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3243 struct in6_addr myaddr, desiredaddr, suggestaddr; 3244 int ifidcount; 3245 int type; 3246 int collision, nohisaddr; 3247 3248 len -= 4; 3249 origlen = len; 3250 /* 3251 * Make sure to allocate a buf that can at least hold a 3252 * conf-nak with an `address' option. We might need it below. 3253 */ 3254 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 3255 if (! buf) 3256 return (0); 3257 3258 /* pass 1: see if we can recognize them */ 3259 if (debug) 3260 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:", 3261 SPP_ARGS(ifp)); 3262 p = (void*) (h+1); 3263 ifidcount = 0; 3264 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3265 if (debug) 3266 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3267 switch (*p) { 3268 case IPV6CP_OPT_IFID: 3269 if (len >= 10 && p[1] == 10 && ifidcount == 0) { 3270 /* correctly formed address option */ 3271 ifidcount++; 3272 continue; 3273 } 3274 if (debug) 3275 addlog(" [invalid]"); 3276 break; 3277 #ifdef notyet 3278 case IPV6CP_OPT_COMPRESSION: 3279 if (len >= 4 && p[1] >= 4) { 3280 /* correctly formed compress option */ 3281 continue; 3282 } 3283 if (debug) 3284 addlog(" [invalid]"); 3285 break; 3286 #endif 3287 default: 3288 /* Others not supported. */ 3289 if (debug) 3290 addlog(" [rej]"); 3291 break; 3292 } 3293 /* Add the option to rejected list. */ 3294 bcopy (p, r, p[1]); 3295 r += p[1]; 3296 rlen += p[1]; 3297 } 3298 if (rlen) { 3299 if (debug) 3300 addlog(" send conf-rej\n"); 3301 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3302 goto end; 3303 } else if (debug) 3304 addlog("\n"); 3305 3306 /* pass 2: parse option values */ 3307 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3308 if (debug) 3309 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ", 3310 SPP_ARGS(ifp)); 3311 p = (void*) (h+1); 3312 len = origlen; 3313 type = CONF_ACK; 3314 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3315 if (debug) 3316 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3317 switch (*p) { 3318 #ifdef notyet 3319 case IPV6CP_OPT_COMPRESSION: 3320 continue; 3321 #endif 3322 case IPV6CP_OPT_IFID: 3323 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3324 bcopy(&p[2], &desiredaddr.s6_addr[8], 8); 3325 collision = (memcmp(&desiredaddr.s6_addr[8], 3326 &myaddr.s6_addr[8], 8) == 0); 3327 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3328 3329 desiredaddr.s6_addr16[0] = htons(0xfe80); 3330 desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3331 3332 if (!collision && !nohisaddr) { 3333 /* no collision, hisaddr known - Conf-Ack */ 3334 type = CONF_ACK; 3335 3336 if (debug) { 3337 addlog(" %s [%s]", 3338 ip6_sprintf(&desiredaddr), 3339 sppp_cp_type_name(type)); 3340 } 3341 continue; 3342 } 3343 3344 memset(&suggestaddr, 0, sizeof(&suggestaddr)); 3345 if (collision && nohisaddr) { 3346 /* collision, hisaddr unknown - Conf-Rej */ 3347 type = CONF_REJ; 3348 memset(&p[2], 0, 8); 3349 } else { 3350 /* 3351 * - no collision, hisaddr unknown, or 3352 * - collision, hisaddr known 3353 * Conf-Nak, suggest hisaddr 3354 */ 3355 type = CONF_NAK; 3356 sppp_suggest_ip6_addr(sp, &suggestaddr); 3357 bcopy(&suggestaddr.s6_addr[8], &p[2], 8); 3358 } 3359 if (debug) 3360 addlog(" %s [%s]", ip6_sprintf(&desiredaddr), 3361 sppp_cp_type_name(type)); 3362 break; 3363 } 3364 /* Add the option to nak'ed list. */ 3365 bcopy (p, r, p[1]); 3366 r += p[1]; 3367 rlen += p[1]; 3368 } 3369 3370 if (rlen == 0 && type == CONF_ACK) { 3371 if (debug) 3372 addlog(" send %s\n", sppp_cp_type_name(type)); 3373 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1); 3374 } else { 3375 #ifdef DIAGNOSTIC 3376 if (type == CONF_ACK) 3377 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3378 #endif 3379 3380 if (debug) { 3381 addlog(" send %s suggest %s\n", 3382 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr)); 3383 } 3384 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3385 } 3386 3387 end: 3388 free (buf, M_TEMP); 3389 return (rlen == 0); 3390 } 3391 3392 /* 3393 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3394 * negotiation. 3395 */ 3396 static void 3397 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3398 { 3399 u_char *buf, *p; 3400 struct ifnet *ifp = &sp->pp_if; 3401 int debug = ifp->if_flags & IFF_DEBUG; 3402 3403 len -= 4; 3404 buf = malloc (len, M_TEMP, M_NOWAIT); 3405 if (!buf) 3406 return; 3407 3408 if (debug) 3409 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:", 3410 SPP_ARGS(ifp)); 3411 3412 p = (void*) (h+1); 3413 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3414 if (debug) 3415 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3416 switch (*p) { 3417 case IPV6CP_OPT_IFID: 3418 /* 3419 * Peer doesn't grok address option. This is 3420 * bad. XXX Should we better give up here? 3421 */ 3422 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3423 break; 3424 #ifdef notyet 3425 case IPV6CP_OPT_COMPRESS: 3426 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3427 break; 3428 #endif 3429 } 3430 } 3431 if (debug) 3432 addlog("\n"); 3433 free (buf, M_TEMP); 3434 return; 3435 } 3436 3437 /* 3438 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3439 * negotiation. 3440 */ 3441 static void 3442 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3443 { 3444 u_char *buf, *p; 3445 struct ifnet *ifp = &sp->pp_if; 3446 int debug = ifp->if_flags & IFF_DEBUG; 3447 struct in6_addr suggestaddr; 3448 3449 len -= 4; 3450 buf = malloc (len, M_TEMP, M_NOWAIT); 3451 if (!buf) 3452 return; 3453 3454 if (debug) 3455 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:", 3456 SPP_ARGS(ifp)); 3457 3458 p = (void*) (h+1); 3459 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3460 if (debug) 3461 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3462 switch (*p) { 3463 case IPV6CP_OPT_IFID: 3464 /* 3465 * Peer doesn't like our local ifid. See 3466 * if we can do something for him. We'll drop 3467 * him our address then. 3468 */ 3469 if (len < 10 || p[1] != 10) 3470 break; 3471 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3472 suggestaddr.s6_addr16[0] = htons(0xfe80); 3473 suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3474 bcopy(&p[2], &suggestaddr.s6_addr[8], 8); 3475 3476 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3477 if (debug) 3478 addlog(" [suggestaddr %s]", 3479 ip6_sprintf(&suggestaddr)); 3480 #ifdef IPV6CP_MYIFID_DYN 3481 /* 3482 * When doing dynamic address assignment, 3483 * we accept his offer. 3484 */ 3485 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3486 struct in6_addr lastsuggest; 3487 /* 3488 * If <suggested myaddr from peer> equals to 3489 * <hisaddr we have suggested last time>, 3490 * we have a collision. generate new random 3491 * ifid. 3492 */ 3493 sppp_suggest_ip6_addr(&lastsuggest); 3494 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3495 lastsuggest)) { 3496 if (debug) 3497 addlog(" [random]"); 3498 sppp_gen_ip6_addr(sp, &suggestaddr); 3499 } 3500 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3501 if (debug) 3502 addlog(" [agree]"); 3503 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3504 } 3505 #else 3506 /* 3507 * Since we do not do dynamic address assignment, 3508 * we ignore it and thus continue to negotiate 3509 * our already existing value. This can possibly 3510 * go into infinite request-reject loop. 3511 * 3512 * This is not likely because we normally use 3513 * ifid based on MAC-address. 3514 * If you have no ethernet card on the node, too bad. 3515 * XXX should we use fail_counter? 3516 */ 3517 #endif 3518 break; 3519 #ifdef notyet 3520 case IPV6CP_OPT_COMPRESS: 3521 /* 3522 * Peer wants different compression parameters. 3523 */ 3524 break; 3525 #endif 3526 } 3527 } 3528 if (debug) 3529 addlog("\n"); 3530 free (buf, M_TEMP); 3531 return; 3532 } 3533 3534 static void 3535 sppp_ipv6cp_tlu(struct sppp *sp) 3536 { 3537 /* we are up - notify isdn daemon */ 3538 if (sp->pp_con) 3539 sp->pp_con(sp); 3540 } 3541 3542 static void 3543 sppp_ipv6cp_tld(struct sppp *sp) 3544 { 3545 } 3546 3547 static void 3548 sppp_ipv6cp_tls(struct sppp *sp) 3549 { 3550 /* indicate to LCP that it must stay alive */ 3551 sp->lcp.protos |= (1 << IDX_IPV6CP); 3552 } 3553 3554 static void 3555 sppp_ipv6cp_tlf(struct sppp *sp) 3556 { 3557 /* we no longer need LCP */ 3558 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3559 } 3560 3561 static void 3562 sppp_ipv6cp_scr(struct sppp *sp) 3563 { 3564 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3565 struct in6_addr ouraddr; 3566 int i = 0; 3567 3568 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3569 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3570 opt[i++] = IPV6CP_OPT_IFID; 3571 opt[i++] = 10; 3572 bcopy(&ouraddr.s6_addr[8], &opt[i], 8); 3573 i += 8; 3574 } 3575 3576 #ifdef notyet 3577 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 3578 opt[i++] = IPV6CP_OPT_COMPRESSION; 3579 opt[i++] = 4; 3580 opt[i++] = 0; /* TBD */ 3581 opt[i++] = 0; /* TBD */ 3582 /* variable length data may follow */ 3583 } 3584 #endif 3585 3586 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 3587 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 3588 } 3589 #else /*INET6*/ 3590 static void sppp_ipv6cp_init(struct sppp *sp) 3591 { 3592 } 3593 3594 static void sppp_ipv6cp_up(struct sppp *sp) 3595 { 3596 } 3597 3598 static void sppp_ipv6cp_down(struct sppp *sp) 3599 { 3600 } 3601 3602 3603 static void sppp_ipv6cp_open(struct sppp *sp) 3604 { 3605 } 3606 3607 static void sppp_ipv6cp_close(struct sppp *sp) 3608 { 3609 } 3610 3611 static void sppp_ipv6cp_TO(void *sp) 3612 { 3613 } 3614 3615 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3616 { 3617 return 0; 3618 } 3619 3620 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3621 { 3622 } 3623 3624 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3625 { 3626 } 3627 3628 static void sppp_ipv6cp_tlu(struct sppp *sp) 3629 { 3630 } 3631 3632 static void sppp_ipv6cp_tld(struct sppp *sp) 3633 { 3634 } 3635 3636 static void sppp_ipv6cp_tls(struct sppp *sp) 3637 { 3638 } 3639 3640 static void sppp_ipv6cp_tlf(struct sppp *sp) 3641 { 3642 } 3643 3644 static void sppp_ipv6cp_scr(struct sppp *sp) 3645 { 3646 } 3647 #endif /*INET6*/ 3648 3649 3650 /* 3651 *--------------------------------------------------------------------------* 3652 * * 3653 * The CHAP implementation. * 3654 * * 3655 *--------------------------------------------------------------------------* 3656 */ 3657 3658 /* 3659 * The authentication protocols don't employ a full-fledged state machine as 3660 * the control protocols do, since they do have Open and Close events, but 3661 * not Up and Down, nor are they explicitly terminated. Also, use of the 3662 * authentication protocols may be different in both directions (this makes 3663 * sense, think of a machine that never accepts incoming calls but only 3664 * calls out, it doesn't require the called party to authenticate itself). 3665 * 3666 * Our state machine for the local authentication protocol (we are requesting 3667 * the peer to authenticate) looks like: 3668 * 3669 * RCA- 3670 * +--------------------------------------------+ 3671 * V scn,tld| 3672 * +--------+ Close +---------+ RCA+ 3673 * | |<----------------------------------| |------+ 3674 * +--->| Closed | TO* | Opened | sca | 3675 * | | |-----+ +-------| |<-----+ 3676 * | +--------+ irc | | +---------+ 3677 * | ^ | | ^ 3678 * | | | | | 3679 * | | | | | 3680 * | TO-| | | | 3681 * | |tld TO+ V | | 3682 * | | +------->+ | | 3683 * | | | | | | 3684 * | +--------+ V | | 3685 * | | |<----+<--------------------+ | 3686 * | | Req- | scr | 3687 * | | Sent | | 3688 * | | | | 3689 * | +--------+ | 3690 * | RCA- | | RCA+ | 3691 * +------+ +------------------------------------------+ 3692 * scn,tld sca,irc,ict,tlu 3693 * 3694 * 3695 * with: 3696 * 3697 * Open: LCP reached authentication phase 3698 * Close: LCP reached terminate phase 3699 * 3700 * RCA+: received reply (pap-req, chap-response), acceptable 3701 * RCN: received reply (pap-req, chap-response), not acceptable 3702 * TO+: timeout with restart counter >= 0 3703 * TO-: timeout with restart counter < 0 3704 * TO*: reschedule timeout for CHAP 3705 * 3706 * scr: send request packet (none for PAP, chap-challenge) 3707 * sca: send ack packet (pap-ack, chap-success) 3708 * scn: send nak packet (pap-nak, chap-failure) 3709 * ict: initialize re-challenge timer (CHAP only) 3710 * 3711 * tlu: this-layer-up, LCP reaches network phase 3712 * tld: this-layer-down, LCP enters terminate phase 3713 * 3714 * Note that in CHAP mode, after sending a new challenge, while the state 3715 * automaton falls back into Req-Sent state, it doesn't signal a tld 3716 * event to LCP, so LCP remains in network phase. Only after not getting 3717 * any response (or after getting an unacceptable response), CHAP closes, 3718 * causing LCP to enter terminate phase. 3719 * 3720 * With PAP, there is no initial request that can be sent. The peer is 3721 * expected to send one based on the successful negotiation of PAP as 3722 * the authentication protocol during the LCP option negotiation. 3723 * 3724 * Incoming authentication protocol requests (remote requests 3725 * authentication, we are peer) don't employ a state machine at all, 3726 * they are simply answered. Some peers [Ascend P50 firmware rev 3727 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 3728 * still in authentication phase (thereby violating the standard that 3729 * demands that these NCP packets are to be discarded), so we keep 3730 * track of the peer demanding us to authenticate, and only proceed to 3731 * phase network once we've seen a positive acknowledge for the 3732 * authentication. 3733 */ 3734 3735 /* 3736 * Handle incoming CHAP packets. 3737 */ 3738 void 3739 sppp_chap_input(struct sppp *sp, struct mbuf *m) 3740 { 3741 STDDCL; 3742 struct lcp_header *h; 3743 int len, x; 3744 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 3745 int value_len, name_len; 3746 MD5_CTX ctx; 3747 3748 len = m->m_pkthdr.len; 3749 if (len < 4) { 3750 if (debug) 3751 log(LOG_DEBUG, 3752 SPP_FMT "chap invalid packet length: %d bytes\n", 3753 SPP_ARGS(ifp), len); 3754 return; 3755 } 3756 h = mtod (m, struct lcp_header*); 3757 if (len > ntohs (h->len)) 3758 len = ntohs (h->len); 3759 3760 switch (h->type) { 3761 /* challenge, failure and success are his authproto */ 3762 case CHAP_CHALLENGE: 3763 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 3764 /* can't do anything usefull */ 3765 sp->pp_auth_failures++; 3766 printf(SPP_FMT "chap input without my name and my secret being set\n", 3767 SPP_ARGS(ifp)); 3768 break; 3769 } 3770 value = 1 + (u_char*)(h+1); 3771 value_len = value[-1]; 3772 name = value + value_len; 3773 name_len = len - value_len - 5; 3774 if (name_len < 0) { 3775 if (debug) { 3776 log(LOG_DEBUG, 3777 SPP_FMT "chap corrupted challenge " 3778 "<%s id=0x%x len=%d", 3779 SPP_ARGS(ifp), 3780 sppp_auth_type_name(PPP_CHAP, h->type), 3781 h->ident, ntohs(h->len)); 3782 if (len > 4) 3783 sppp_print_bytes((u_char*) (h+1), len-4); 3784 addlog(">\n"); 3785 } 3786 break; 3787 } 3788 3789 if (debug) { 3790 log(LOG_DEBUG, 3791 SPP_FMT "chap input <%s id=0x%x len=%d name=", 3792 SPP_ARGS(ifp), 3793 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 3794 ntohs(h->len)); 3795 sppp_print_string((char*) name, name_len); 3796 addlog(" value-size=%d value=", value_len); 3797 sppp_print_bytes(value, value_len); 3798 addlog(">\n"); 3799 } 3800 3801 /* Compute reply value. */ 3802 MD5Init(&ctx); 3803 MD5Update(&ctx, &h->ident, 1); 3804 MD5Update(&ctx, sp->myauth.secret, strlen(sp->myauth.secret)); 3805 MD5Update(&ctx, value, value_len); 3806 MD5Final(digest, &ctx); 3807 dsize = sizeof digest; 3808 3809 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 3810 sizeof dsize, (const char *)&dsize, 3811 sizeof digest, digest, 3812 strlen(sp->myauth.name), 3813 sp->myauth.name, 3814 0); 3815 break; 3816 3817 case CHAP_SUCCESS: 3818 if (debug) { 3819 log(LOG_DEBUG, SPP_FMT "chap success", 3820 SPP_ARGS(ifp)); 3821 if (len > 4) { 3822 addlog(": "); 3823 sppp_print_string((char*)(h + 1), len - 4); 3824 } 3825 addlog("\n"); 3826 } 3827 x = splnet(); 3828 sp->pp_auth_failures = 0; 3829 sp->pp_flags &= ~PP_NEEDAUTH; 3830 if (sp->myauth.proto == PPP_CHAP && 3831 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 3832 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 3833 /* 3834 * We are authenticator for CHAP but didn't 3835 * complete yet. Leave it to tlu to proceed 3836 * to network phase. 3837 */ 3838 splx(x); 3839 break; 3840 } 3841 splx(x); 3842 sppp_phase_network(sp); 3843 break; 3844 3845 case CHAP_FAILURE: 3846 x = splnet(); 3847 sp->pp_auth_failures++; 3848 splx(x); 3849 if (debug) { 3850 log(LOG_INFO, SPP_FMT "chap failure", 3851 SPP_ARGS(ifp)); 3852 if (len > 4) { 3853 addlog(": "); 3854 sppp_print_string((char*)(h + 1), len - 4); 3855 } 3856 addlog("\n"); 3857 } else 3858 log(LOG_INFO, SPP_FMT "chap failure\n", 3859 SPP_ARGS(ifp)); 3860 /* await LCP shutdown by authenticator */ 3861 break; 3862 3863 /* response is my authproto */ 3864 case CHAP_RESPONSE: 3865 if (sp->hisauth.secret == NULL) { 3866 /* can't do anything usefull */ 3867 printf(SPP_FMT "chap input without his secret being set\n", 3868 SPP_ARGS(ifp)); 3869 break; 3870 } 3871 value = 1 + (u_char*)(h+1); 3872 value_len = value[-1]; 3873 name = value + value_len; 3874 name_len = len - value_len - 5; 3875 if (name_len < 0) { 3876 if (debug) { 3877 log(LOG_DEBUG, 3878 SPP_FMT "chap corrupted response " 3879 "<%s id=0x%x len=%d", 3880 SPP_ARGS(ifp), 3881 sppp_auth_type_name(PPP_CHAP, h->type), 3882 h->ident, ntohs(h->len)); 3883 if (len > 4) 3884 sppp_print_bytes((u_char*)(h+1), len-4); 3885 addlog(">\n"); 3886 } 3887 break; 3888 } 3889 if (h->ident != sp->confid[IDX_CHAP]) { 3890 if (debug) 3891 log(LOG_DEBUG, 3892 SPP_FMT "chap dropping response for old ID " 3893 "(got %d, expected %d)\n", 3894 SPP_ARGS(ifp), 3895 h->ident, sp->confid[IDX_CHAP]); 3896 break; 3897 } 3898 if (sp->hisauth.name != NULL && 3899 (name_len != strlen(sp->hisauth.name) 3900 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 3901 log(LOG_INFO, SPP_FMT "chap response, his name ", 3902 SPP_ARGS(ifp)); 3903 sppp_print_string(name, name_len); 3904 addlog(" != expected "); 3905 sppp_print_string(sp->hisauth.name, 3906 strlen(sp->hisauth.name)); 3907 addlog("\n"); 3908 goto chap_failure; 3909 } 3910 if (debug) { 3911 log(LOG_DEBUG, SPP_FMT "chap input(%s) " 3912 "<%s id=0x%x len=%d name=", 3913 SPP_ARGS(ifp), 3914 sppp_state_name(sp->state[IDX_CHAP]), 3915 sppp_auth_type_name(PPP_CHAP, h->type), 3916 h->ident, ntohs (h->len)); 3917 sppp_print_string((char*)name, name_len); 3918 addlog(" value-size=%d value=", value_len); 3919 sppp_print_bytes(value, value_len); 3920 addlog(">\n"); 3921 } 3922 if (value_len != sizeof(sp->myauth.challenge)) { 3923 if (debug) 3924 log(LOG_DEBUG, 3925 SPP_FMT "chap bad hash value length: " 3926 "%d bytes, should be %ld\n", 3927 SPP_ARGS(ifp), value_len, 3928 (long) sizeof(sp->myauth.challenge)); 3929 goto chap_failure; 3930 } 3931 3932 MD5Init(&ctx); 3933 MD5Update(&ctx, &h->ident, 1); 3934 MD5Update(&ctx, sp->hisauth.secret, 3935 strlen(sp->hisauth.secret)); 3936 MD5Update(&ctx, sp->myauth.challenge, sizeof(sp->myauth.challenge)); 3937 MD5Final(digest, &ctx); 3938 3939 #define FAILMSG "Failed..." 3940 #define SUCCMSG "Welcome!" 3941 3942 if (value_len != sizeof digest || 3943 memcmp(digest, value, value_len) != 0) { 3944 chap_failure: 3945 /* action scn, tld */ 3946 x = splnet(); 3947 sp->pp_auth_failures++; 3948 splx(x); 3949 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 3950 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 3951 0); 3952 chap.tld(sp); 3953 break; 3954 } 3955 sp->pp_auth_failures = 0; 3956 /* action sca, perhaps tlu */ 3957 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 3958 sp->state[IDX_CHAP] == STATE_OPENED) 3959 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 3960 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 3961 0); 3962 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 3963 sppp_cp_change_state(&chap, sp, STATE_OPENED); 3964 chap.tlu(sp); 3965 } 3966 break; 3967 3968 default: 3969 /* Unknown CHAP packet type -- ignore. */ 3970 if (debug) { 3971 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) " 3972 "<0x%x id=0x%xh len=%d", 3973 SPP_ARGS(ifp), 3974 sppp_state_name(sp->state[IDX_CHAP]), 3975 h->type, h->ident, ntohs(h->len)); 3976 if (len > 4) 3977 sppp_print_bytes((u_char*)(h+1), len-4); 3978 addlog(">\n"); 3979 } 3980 break; 3981 3982 } 3983 } 3984 3985 static void 3986 sppp_chap_init(struct sppp *sp) 3987 { 3988 /* Chap doesn't have STATE_INITIAL at all. */ 3989 sp->state[IDX_CHAP] = STATE_CLOSED; 3990 sp->fail_counter[IDX_CHAP] = 0; 3991 sp->pp_seq[IDX_CHAP] = 0; 3992 sp->pp_rseq[IDX_CHAP] = 0; 3993 callout_init(&sp->ch[IDX_CHAP]); 3994 } 3995 3996 static void 3997 sppp_chap_open(struct sppp *sp) 3998 { 3999 if (sp->myauth.proto == PPP_CHAP && 4000 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4001 /* we are authenticator for CHAP, start it */ 4002 chap.scr(sp); 4003 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4004 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4005 } 4006 /* nothing to be done if we are peer, await a challenge */ 4007 } 4008 4009 static void 4010 sppp_chap_close(struct sppp *sp) 4011 { 4012 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4013 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4014 } 4015 4016 static void 4017 sppp_chap_TO(void *cookie) 4018 { 4019 struct sppp *sp = (struct sppp *)cookie; 4020 STDDCL; 4021 int s; 4022 4023 s = splnet(); 4024 if (debug) 4025 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n", 4026 SPP_ARGS(ifp), 4027 sppp_state_name(sp->state[IDX_CHAP]), 4028 sp->rst_counter[IDX_CHAP]); 4029 4030 if (--sp->rst_counter[IDX_CHAP] < 0) 4031 /* TO- event */ 4032 switch (sp->state[IDX_CHAP]) { 4033 case STATE_REQ_SENT: 4034 chap.tld(sp); 4035 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4036 break; 4037 } 4038 else 4039 /* TO+ (or TO*) event */ 4040 switch (sp->state[IDX_CHAP]) { 4041 case STATE_OPENED: 4042 /* TO* event */ 4043 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4044 /* fall through */ 4045 case STATE_REQ_SENT: 4046 chap.scr(sp); 4047 /* sppp_cp_change_state() will restart the timer */ 4048 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4049 break; 4050 } 4051 4052 splx(s); 4053 } 4054 4055 static void 4056 sppp_chap_tlu(struct sppp *sp) 4057 { 4058 STDDCL; 4059 int i, x; 4060 4061 i = 0; 4062 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4063 4064 /* 4065 * Some broken CHAP implementations (Conware CoNet, firmware 4066 * 4.0.?) don't want to re-authenticate their CHAP once the 4067 * initial challenge-response exchange has taken place. 4068 * Provide for an option to avoid rechallenges. 4069 */ 4070 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4071 /* 4072 * Compute the re-challenge timeout. This will yield 4073 * a number between 300 and 810 seconds. 4074 */ 4075 i = 300 + ((unsigned)(random() & 0xff00) >> 7); 4076 4077 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4078 } 4079 4080 if (debug) { 4081 log(LOG_DEBUG, 4082 SPP_FMT "chap %s, ", 4083 SPP_ARGS(ifp), 4084 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu"); 4085 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) 4086 addlog("next re-challenge in %d seconds\n", i); 4087 else 4088 addlog("re-challenging supressed\n"); 4089 } 4090 4091 x = splnet(); 4092 sp->pp_auth_failures = 0; 4093 /* indicate to LCP that we need to be closed down */ 4094 sp->lcp.protos |= (1 << IDX_CHAP); 4095 4096 if (sp->pp_flags & PP_NEEDAUTH) { 4097 /* 4098 * Remote is authenticator, but his auth proto didn't 4099 * complete yet. Defer the transition to network 4100 * phase. 4101 */ 4102 splx(x); 4103 return; 4104 } 4105 splx(x); 4106 4107 /* 4108 * If we are already in phase network, we are done here. This 4109 * is the case if this is a dummy tlu event after a re-challenge. 4110 */ 4111 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4112 sppp_phase_network(sp); 4113 } 4114 4115 static void 4116 sppp_chap_tld(struct sppp *sp) 4117 { 4118 STDDCL; 4119 4120 if (debug) 4121 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp)); 4122 callout_stop(&sp->ch[IDX_CHAP]); 4123 sp->lcp.protos &= ~(1 << IDX_CHAP); 4124 4125 lcp.Close(sp); 4126 } 4127 4128 static void 4129 sppp_chap_scr(struct sppp *sp) 4130 { 4131 struct timeval tv; 4132 u_int32_t *ch, seed; 4133 u_char clen; 4134 4135 if (sp->myauth.name == NULL) { 4136 /* can't do anything usefull */ 4137 printf(SPP_FMT "chap starting without my name being set\n", 4138 SPP_ARGS(&sp->pp_if)); 4139 return; 4140 } 4141 4142 /* Compute random challenge. */ 4143 ch = (u_int32_t *)sp->myauth.challenge; 4144 microtime(&tv); 4145 seed = tv.tv_sec ^ tv.tv_usec; 4146 ch[0] = seed ^ random(); 4147 ch[1] = seed ^ random(); 4148 ch[2] = seed ^ random(); 4149 ch[3] = seed ^ random(); 4150 clen = 16; /* 4 * sizeof(u_int32_t) */ 4151 4152 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4153 4154 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4155 sizeof clen, (const char *)&clen, 4156 sizeof(sp->myauth.challenge), sp->myauth.challenge, 4157 strlen(sp->myauth.name), 4158 sp->myauth.name, 4159 0); 4160 } 4161 4162 /* 4163 *--------------------------------------------------------------------------* 4164 * * 4165 * The PAP implementation. * 4166 * * 4167 *--------------------------------------------------------------------------* 4168 */ 4169 /* 4170 * For PAP, we need to keep a little state also if we are the peer, not the 4171 * authenticator. This is since we don't get a request to authenticate, but 4172 * have to repeatedly authenticate ourself until we got a response (or the 4173 * retry counter is expired). 4174 */ 4175 4176 /* 4177 * Handle incoming PAP packets. */ 4178 static void 4179 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4180 { 4181 STDDCL; 4182 struct lcp_header *h; 4183 int len, x; 4184 u_char mlen; 4185 char *name, *passwd; 4186 int name_len, passwd_len; 4187 4188 len = m->m_pkthdr.len; 4189 if (len < 5) { 4190 if (debug) 4191 log(LOG_DEBUG, 4192 SPP_FMT "pap invalid packet length: %d bytes\n", 4193 SPP_ARGS(ifp), len); 4194 return; 4195 } 4196 h = mtod (m, struct lcp_header*); 4197 if (len > ntohs (h->len)) 4198 len = ntohs (h->len); 4199 switch (h->type) { 4200 /* PAP request is my authproto */ 4201 case PAP_REQ: 4202 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4203 /* can't do anything usefull */ 4204 printf(SPP_FMT "pap request without his name and his secret being set\n", 4205 SPP_ARGS(ifp)); 4206 break; 4207 } 4208 name = 1 + (u_char*)(h+1); 4209 name_len = name[-1]; 4210 passwd = name + name_len + 1; 4211 if (name_len > len - 6 || 4212 (passwd_len = passwd[-1]) > len - 6 - name_len) { 4213 if (debug) { 4214 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4215 "<%s id=0x%x len=%d", 4216 SPP_ARGS(ifp), 4217 sppp_auth_type_name(PPP_PAP, h->type), 4218 h->ident, ntohs(h->len)); 4219 if (len > 4) 4220 sppp_print_bytes((u_char*)(h+1), len-4); 4221 addlog(">\n"); 4222 } 4223 break; 4224 } 4225 if (debug) { 4226 log(LOG_DEBUG, SPP_FMT "pap input(%s) " 4227 "<%s id=0x%x len=%d name=", 4228 SPP_ARGS(ifp), 4229 sppp_state_name(sp->state[IDX_PAP]), 4230 sppp_auth_type_name(PPP_PAP, h->type), 4231 h->ident, ntohs(h->len)); 4232 sppp_print_string((char*)name, name_len); 4233 addlog(" passwd="); 4234 sppp_print_string((char*)passwd, passwd_len); 4235 addlog(">\n"); 4236 } 4237 if (memcmp(name, sp->hisauth.name, name_len) != 0 || 4238 memcmp(passwd, sp->hisauth.secret, passwd_len) != 0) { 4239 /* action scn, tld */ 4240 sp->pp_auth_failures++; 4241 mlen = sizeof(FAILMSG) - 1; 4242 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4243 sizeof mlen, (const char *)&mlen, 4244 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 4245 0); 4246 pap.tld(sp); 4247 break; 4248 } 4249 /* action sca, perhaps tlu */ 4250 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4251 sp->state[IDX_PAP] == STATE_OPENED) { 4252 mlen = sizeof(SUCCMSG) - 1; 4253 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4254 sizeof mlen, (const char *)&mlen, 4255 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 4256 0); 4257 } 4258 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4259 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4260 pap.tlu(sp); 4261 } 4262 break; 4263 4264 /* ack and nak are his authproto */ 4265 case PAP_ACK: 4266 callout_stop(&sp->pap_my_to_ch); 4267 if (debug) { 4268 log(LOG_DEBUG, SPP_FMT "pap success", 4269 SPP_ARGS(ifp)); 4270 name_len = *(char *)h; 4271 if (len > 5 && name_len) { 4272 addlog(": "); 4273 sppp_print_string((char*)(h+1), name_len); 4274 } 4275 addlog("\n"); 4276 } 4277 x = splnet(); 4278 sp->pp_auth_failures = 0; 4279 sp->pp_flags &= ~PP_NEEDAUTH; 4280 if (sp->myauth.proto == PPP_PAP && 4281 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4282 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4283 /* 4284 * We are authenticator for PAP but didn't 4285 * complete yet. Leave it to tlu to proceed 4286 * to network phase. 4287 */ 4288 splx(x); 4289 break; 4290 } 4291 splx(x); 4292 sppp_phase_network(sp); 4293 break; 4294 4295 case PAP_NAK: 4296 callout_stop(&sp->pap_my_to_ch); 4297 sp->pp_auth_failures++; 4298 if (debug) { 4299 log(LOG_INFO, SPP_FMT "pap failure", 4300 SPP_ARGS(ifp)); 4301 name_len = *(char *)h; 4302 if (len > 5 && name_len) { 4303 addlog(": "); 4304 sppp_print_string((char*)(h+1), name_len); 4305 } 4306 addlog("\n"); 4307 } else 4308 log(LOG_INFO, SPP_FMT "pap failure\n", 4309 SPP_ARGS(ifp)); 4310 /* await LCP shutdown by authenticator */ 4311 break; 4312 4313 default: 4314 /* Unknown PAP packet type -- ignore. */ 4315 if (debug) { 4316 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4317 "<0x%x id=0x%x len=%d", 4318 SPP_ARGS(ifp), 4319 h->type, h->ident, ntohs(h->len)); 4320 if (len > 4) 4321 sppp_print_bytes((u_char*)(h+1), len-4); 4322 addlog(">\n"); 4323 } 4324 break; 4325 4326 } 4327 } 4328 4329 static void 4330 sppp_pap_init(struct sppp *sp) 4331 { 4332 /* PAP doesn't have STATE_INITIAL at all. */ 4333 sp->state[IDX_PAP] = STATE_CLOSED; 4334 sp->fail_counter[IDX_PAP] = 0; 4335 sp->pp_seq[IDX_PAP] = 0; 4336 sp->pp_rseq[IDX_PAP] = 0; 4337 callout_init(&sp->ch[IDX_PAP]); 4338 callout_init(&sp->pap_my_to_ch); 4339 } 4340 4341 static void 4342 sppp_pap_open(struct sppp *sp) 4343 { 4344 if (sp->hisauth.proto == PPP_PAP && 4345 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4346 /* we are authenticator for PAP, start our timer */ 4347 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4348 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4349 } 4350 if (sp->myauth.proto == PPP_PAP) { 4351 /* we are peer, send a request, and start a timer */ 4352 pap.scr(sp); 4353 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4354 sppp_pap_my_TO, sp); 4355 } 4356 } 4357 4358 static void 4359 sppp_pap_close(struct sppp *sp) 4360 { 4361 if (sp->state[IDX_PAP] != STATE_CLOSED) 4362 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4363 } 4364 4365 /* 4366 * That's the timeout routine if we are authenticator. Since the 4367 * authenticator is basically passive in PAP, we can't do much here. 4368 */ 4369 static void 4370 sppp_pap_TO(void *cookie) 4371 { 4372 struct sppp *sp = (struct sppp *)cookie; 4373 STDDCL; 4374 int s; 4375 4376 s = splnet(); 4377 if (debug) 4378 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n", 4379 SPP_ARGS(ifp), 4380 sppp_state_name(sp->state[IDX_PAP]), 4381 sp->rst_counter[IDX_PAP]); 4382 4383 if (--sp->rst_counter[IDX_PAP] < 0) 4384 /* TO- event */ 4385 switch (sp->state[IDX_PAP]) { 4386 case STATE_REQ_SENT: 4387 pap.tld(sp); 4388 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4389 break; 4390 } 4391 else 4392 /* TO+ event, not very much we could do */ 4393 switch (sp->state[IDX_PAP]) { 4394 case STATE_REQ_SENT: 4395 /* sppp_cp_change_state() will restart the timer */ 4396 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4397 break; 4398 } 4399 4400 splx(s); 4401 } 4402 4403 /* 4404 * That's the timeout handler if we are peer. Since the peer is active, 4405 * we need to retransmit our PAP request since it is apparently lost. 4406 * XXX We should impose a max counter. 4407 */ 4408 static void 4409 sppp_pap_my_TO(void *cookie) 4410 { 4411 struct sppp *sp = (struct sppp *)cookie; 4412 STDDCL; 4413 4414 if (debug) 4415 log(LOG_DEBUG, SPP_FMT "pap peer TO\n", 4416 SPP_ARGS(ifp)); 4417 4418 pap.scr(sp); 4419 } 4420 4421 static void 4422 sppp_pap_tlu(struct sppp *sp) 4423 { 4424 STDDCL; 4425 int x; 4426 4427 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4428 4429 if (debug) 4430 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 4431 SPP_ARGS(ifp), pap.name); 4432 4433 x = splnet(); 4434 sp->pp_auth_failures = 0; 4435 /* indicate to LCP that we need to be closed down */ 4436 sp->lcp.protos |= (1 << IDX_PAP); 4437 4438 if (sp->pp_flags & PP_NEEDAUTH) { 4439 /* 4440 * Remote is authenticator, but his auth proto didn't 4441 * complete yet. Defer the transition to network 4442 * phase. 4443 */ 4444 splx(x); 4445 return; 4446 } 4447 splx(x); 4448 sppp_phase_network(sp); 4449 } 4450 4451 static void 4452 sppp_pap_tld(struct sppp *sp) 4453 { 4454 STDDCL; 4455 4456 if (debug) 4457 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp)); 4458 callout_stop(&sp->ch[IDX_PAP]); 4459 callout_stop(&sp->pap_my_to_ch); 4460 sp->lcp.protos &= ~(1 << IDX_PAP); 4461 4462 lcp.Close(sp); 4463 } 4464 4465 static void 4466 sppp_pap_scr(struct sppp *sp) 4467 { 4468 u_char idlen, pwdlen; 4469 4470 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4471 /* can't do anything usefull */ 4472 printf(SPP_FMT "pap starting without my name and secret being set\n", 4473 SPP_ARGS(&sp->pp_if)); 4474 return; 4475 } 4476 4477 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4478 pwdlen = strlen(sp->myauth.secret); 4479 idlen = strlen(sp->myauth.name); 4480 4481 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 4482 sizeof idlen, (const char *)&idlen, 4483 idlen, sp->myauth.name, 4484 sizeof pwdlen, (const char *)&pwdlen, 4485 pwdlen, sp->myauth.secret, 4486 0); 4487 } 4488 4489 /* 4490 * Random miscellaneous functions. 4491 */ 4492 4493 /* 4494 * Send a PAP or CHAP proto packet. 4495 * 4496 * Varadic function, each of the elements for the ellipsis is of type 4497 * ``size_t mlen, const u_char *msg''. Processing will stop iff 4498 * mlen == 0. 4499 * NOTE: never declare variadic functions with types subject to type 4500 * promotion (i.e. u_char). This is asking for big trouble depending 4501 * on the architecture you are on... 4502 */ 4503 4504 static void 4505 sppp_auth_send(const struct cp *cp, struct sppp *sp, 4506 unsigned int type, unsigned int id, 4507 ...) 4508 { 4509 STDDCL; 4510 struct lcp_header *lh; 4511 struct mbuf *m; 4512 u_char *p; 4513 int len; 4514 size_t pkthdrlen; 4515 unsigned int mlen; 4516 const char *msg; 4517 va_list ap; 4518 4519 MGETHDR (m, M_DONTWAIT, MT_DATA); 4520 if (! m) 4521 return; 4522 m->m_pkthdr.rcvif = 0; 4523 4524 if (sp->pp_flags & PP_NOFRAMING) { 4525 *mtod(m, u_int16_t*) = htons(cp->proto); 4526 pkthdrlen = 2; 4527 lh = (struct lcp_header*)(mtod(m, u_int8_t*)+2); 4528 } else { 4529 struct ppp_header *h; 4530 h = mtod (m, struct ppp_header*); 4531 h->address = PPP_ALLSTATIONS; /* broadcast address */ 4532 h->control = PPP_UI; /* Unnumbered Info */ 4533 h->protocol = htons(cp->proto); 4534 pkthdrlen = PPP_HEADER_LEN; 4535 4536 lh = (struct lcp_header*)(h + 1); 4537 } 4538 4539 lh->type = type; 4540 lh->ident = id; 4541 p = (u_char*) (lh+1); 4542 4543 va_start(ap, id); 4544 len = 0; 4545 4546 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 4547 msg = va_arg(ap, const char *); 4548 len += mlen; 4549 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 4550 va_end(ap); 4551 m_freem(m); 4552 return; 4553 } 4554 4555 bcopy(msg, p, mlen); 4556 p += mlen; 4557 } 4558 va_end(ap); 4559 4560 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 4561 lh->len = htons (LCP_HEADER_LEN + len); 4562 4563 if (debug) { 4564 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 4565 SPP_ARGS(ifp), cp->name, 4566 sppp_auth_type_name(cp->proto, lh->type), 4567 lh->ident, ntohs(lh->len)); 4568 if (len) 4569 sppp_print_bytes((u_char*) (lh+1), len); 4570 addlog(">\n"); 4571 } 4572 if (IF_QFULL (&sp->pp_cpq)) { 4573 IF_DROP (&sp->pp_fastq); 4574 IF_DROP (&ifp->if_snd); 4575 m_freem (m); 4576 ++ifp->if_oerrors; 4577 } else 4578 IF_ENQUEUE (&sp->pp_cpq, m); 4579 if (! (ifp->if_flags & IFF_OACTIVE)) 4580 (*ifp->if_start) (ifp); 4581 ifp->if_obytes += m->m_pkthdr.len + 3; 4582 } 4583 4584 /* 4585 * Send keepalive packets, every 10 seconds. 4586 */ 4587 static void 4588 sppp_keepalive(void *dummy) 4589 { 4590 struct sppp *sp; 4591 int s; 4592 time_t now; 4593 4594 s = splnet(); 4595 now = time.tv_sec; 4596 for (sp=spppq; sp; sp=sp->pp_next) { 4597 struct ifnet *ifp = &sp->pp_if; 4598 4599 /* check idle timeout */ 4600 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 4601 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 4602 /* idle timeout is enabled for this interface */ 4603 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 4604 if (ifp->if_flags & IFF_DEBUG) 4605 printf("%s: no activitiy for %lu seconds\n", 4606 sp->pp_if.if_xname, 4607 (unsigned long)(now-sp->pp_last_activity)); 4608 lcp.Close(sp); 4609 continue; 4610 } 4611 } 4612 4613 /* Keepalive mode disabled or channel down? */ 4614 if (! (sp->pp_flags & PP_KEEPALIVE) || 4615 ! (ifp->if_flags & IFF_RUNNING)) 4616 continue; 4617 4618 /* No keepalive in PPP mode if LCP not opened yet. */ 4619 if (! (sp->pp_flags & PP_CISCO) && 4620 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) 4621 continue; 4622 4623 if (sp->pp_alivecnt == MAXALIVECNT) { 4624 /* No keepalive packets got. Stop the interface. */ 4625 if_down (ifp); 4626 IF_PURGE (&sp->pp_cpq); 4627 if (! (sp->pp_flags & PP_CISCO)) { 4628 printf("%s: LCP keepalive timed out, going to restart the connection\n", 4629 ifp->if_xname); 4630 sp->pp_alivecnt = 0; 4631 4632 /* we are down, close all open protocols */ 4633 lcp.Close(sp); 4634 4635 /* And now prepare LCP to reestablish the link, if configured to do so. */ 4636 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 4637 4638 /* Close connection imediatly, completition of this 4639 * will summon the magic needed to reestablish it. */ 4640 sp->pp_tlf(sp); 4641 continue; 4642 } 4643 } 4644 if (sp->pp_alivecnt <= MAXALIVECNT) 4645 ++sp->pp_alivecnt; 4646 if (sp->pp_flags & PP_CISCO) 4647 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ, 4648 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 4649 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 4650 int32_t nmagic = htonl (sp->lcp.magic); 4651 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 4652 sppp_cp_send (sp, PPP_LCP, ECHO_REQ, 4653 sp->lcp.echoid, 4, &nmagic); 4654 } 4655 } 4656 splx(s); 4657 callout_reset(&keepalive_ch, hz * 10, sppp_keepalive, NULL); 4658 } 4659 4660 /* 4661 * Get both IP addresses. 4662 */ 4663 static void 4664 sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, u_int32_t *srcmask) 4665 { 4666 struct ifnet *ifp = &sp->pp_if; 4667 struct ifaddr *ifa; 4668 struct sockaddr_in *si, *sm; 4669 u_int32_t ssrc, ddst; 4670 4671 sm = NULL; 4672 ssrc = ddst = 0; 4673 /* 4674 * Pick the first AF_INET address from the list, 4675 * aliases don't make any sense on a p2p link anyway. 4676 */ 4677 si = 0; 4678 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 4679 if (ifa->ifa_addr->sa_family == AF_INET) { 4680 si = (struct sockaddr_in *)ifa->ifa_addr; 4681 sm = (struct sockaddr_in *)ifa->ifa_netmask; 4682 if (si) 4683 break; 4684 } 4685 } 4686 if (ifa) { 4687 if (si && si->sin_addr.s_addr) { 4688 ssrc = si->sin_addr.s_addr; 4689 if (srcmask) 4690 *srcmask = ntohl(sm->sin_addr.s_addr); 4691 } 4692 4693 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 4694 if (si && si->sin_addr.s_addr) 4695 ddst = si->sin_addr.s_addr; 4696 } 4697 4698 if (dst) *dst = ntohl(ddst); 4699 if (src) *src = ntohl(ssrc); 4700 } 4701 4702 /* 4703 * Set IP addresses. Must be called at splnet. 4704 * If an address is 0, leave it the way it is. 4705 */ 4706 static void 4707 sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr) 4708 { 4709 STDDCL; 4710 struct ifaddr *ifa; 4711 struct sockaddr_in *si; 4712 struct sockaddr_in *dest; 4713 4714 /* 4715 * Pick the first AF_INET address from the list, 4716 * aliases don't make any sense on a p2p link anyway. 4717 */ 4718 4719 si = 0; 4720 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4721 { 4722 if (ifa->ifa_addr->sa_family == AF_INET) 4723 { 4724 si = (struct sockaddr_in *)ifa->ifa_addr; 4725 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4726 if (si) 4727 break; 4728 } 4729 } 4730 4731 if (ifa && si) 4732 { 4733 int error; 4734 struct sockaddr_in new_sin = *si; 4735 struct sockaddr_in new_dst = *dest; 4736 4737 /* 4738 * Scrub old routes now instead of calling in_ifinit with 4739 * scrub=1, because we may change the dstaddr 4740 * before the call to in_ifinit. 4741 */ 4742 in_ifscrub(ifp, ifatoia(ifa)); 4743 4744 if (myaddr != 0) 4745 new_sin.sin_addr.s_addr = htonl(myaddr); 4746 if (hisaddr != 0) { 4747 new_dst.sin_addr.s_addr = htonl(hisaddr); 4748 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) { 4749 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 4750 *dest = new_dst; /* fix dstaddr in place */ 4751 } 4752 } 4753 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4754 if(debug && error) 4755 { 4756 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addrs: in_ifinit " 4757 " failed, error=%d\n", SPP_ARGS(ifp), error); 4758 } 4759 } 4760 } 4761 4762 /* 4763 * Clear IP addresses. Must be called at splnet. 4764 */ 4765 static void 4766 sppp_clear_ip_addrs(struct sppp *sp) 4767 { 4768 struct ifnet *ifp = &sp->pp_if; 4769 struct ifaddr *ifa; 4770 struct sockaddr_in *si; 4771 struct sockaddr_in *dest; 4772 4773 u_int32_t remote; 4774 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4775 remote = sp->ipcp.saved_hisaddr; 4776 else 4777 sppp_get_ip_addrs(sp, 0, &remote, 0); 4778 4779 /* 4780 * Pick the first AF_INET address from the list, 4781 * aliases don't make any sense on a p2p link anyway. 4782 */ 4783 4784 si = 0; 4785 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4786 { 4787 if (ifa->ifa_addr->sa_family == AF_INET) 4788 { 4789 si = (struct sockaddr_in *)ifa->ifa_addr; 4790 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4791 if (si) 4792 break; 4793 } 4794 } 4795 4796 if (ifa && si) 4797 { 4798 struct sockaddr_in new_sin = *si; 4799 4800 in_ifscrub(ifp, ifatoia(ifa)); 4801 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 4802 new_sin.sin_addr.s_addr = 0; 4803 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4804 /* replace peer addr in place */ 4805 dest->sin_addr.s_addr = sp->ipcp.saved_hisaddr; 4806 in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4807 } 4808 } 4809 4810 #ifdef INET6 4811 /* 4812 * Get both IPv6 addresses. 4813 */ 4814 static void 4815 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 4816 struct in6_addr *srcmask) 4817 { 4818 struct ifnet *ifp = &sp->pp_if; 4819 struct ifaddr *ifa; 4820 struct sockaddr_in6 *si, *sm; 4821 struct in6_addr ssrc, ddst; 4822 4823 sm = NULL; 4824 memset(&ssrc, 0, sizeof(ssrc)); 4825 memset(&ddst, 0, sizeof(ddst)); 4826 /* 4827 * Pick the first link-local AF_INET6 address from the list, 4828 * aliases don't make any sense on a p2p link anyway. 4829 */ 4830 si = 0; 4831 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4832 if (ifa->ifa_addr->sa_family == AF_INET6) { 4833 si = (struct sockaddr_in6 *)ifa->ifa_addr; 4834 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 4835 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) 4836 break; 4837 } 4838 if (ifa) { 4839 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 4840 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc)); 4841 if (srcmask) { 4842 bcopy(&sm->sin6_addr, srcmask, 4843 sizeof(*srcmask)); 4844 } 4845 } 4846 4847 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 4848 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 4849 bcopy(&si->sin6_addr, &ddst, sizeof(ddst)); 4850 } 4851 4852 if (dst) 4853 bcopy(&ddst, dst, sizeof(*dst)); 4854 if (src) 4855 bcopy(&ssrc, src, sizeof(*src)); 4856 } 4857 4858 #ifdef IPV6CP_MYIFID_DYN 4859 /* 4860 * Generate random ifid. 4861 */ 4862 static void 4863 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 4864 { 4865 /* TBD */ 4866 } 4867 4868 /* 4869 * Set my IPv6 address. Must be called at splnet. 4870 */ 4871 static void 4872 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 4873 { 4874 STDDCL; 4875 struct ifaddr *ifa; 4876 struct sockaddr_in6 *sin6; 4877 4878 /* 4879 * Pick the first link-local AF_INET6 address from the list, 4880 * aliases don't make any sense on a p2p link anyway. 4881 */ 4882 4883 sin6 = NULL; 4884 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4885 { 4886 if (ifa->ifa_addr->sa_family == AF_INET6) 4887 { 4888 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 4889 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 4890 break; 4891 } 4892 } 4893 4894 if (ifa && sin6) 4895 { 4896 int error; 4897 struct sockaddr_in6 new_sin6 = *sin6; 4898 4899 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr)); 4900 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 4901 if (debug && error) 4902 { 4903 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit " 4904 " failed, error=%d\n", SPP_ARGS(ifp), error); 4905 } 4906 } 4907 } 4908 #endif 4909 4910 /* 4911 * Suggest a candidate address to be used by peer. 4912 */ 4913 static void 4914 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 4915 { 4916 struct in6_addr myaddr; 4917 struct timeval tv; 4918 4919 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4920 4921 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 4922 microtime(&tv); 4923 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 4924 myaddr.s6_addr[14] ^= 0xff; 4925 myaddr.s6_addr[15] ^= 0xff; 4926 } else { 4927 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 4928 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 4929 } 4930 if (suggest) 4931 bcopy(&myaddr, suggest, sizeof(myaddr)); 4932 } 4933 #endif /*INET6*/ 4934 4935 /* 4936 * Process ioctl requests specific to the PPP interface. 4937 * Permissions have already been checked. 4938 */ 4939 static int 4940 sppp_params(struct sppp *sp, int cmd, void *data) 4941 { 4942 switch (cmd) { 4943 case SPPPGETAUTHCFG: 4944 { 4945 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 4946 int error; 4947 size_t len; 4948 4949 cfg->myauthflags = sp->myauth.flags; 4950 cfg->hisauthflags = sp->hisauth.flags; 4951 strncpy(cfg->ifname, sp->pp_if.if_xname, IFNAMSIZ); 4952 cfg->hisauth = 0; 4953 if (sp->hisauth.proto) 4954 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4955 cfg->myauth = 0; 4956 if (sp->myauth.proto) 4957 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 4958 if (cfg->myname_length == 0) { 4959 if (sp->myauth.name != NULL) 4960 cfg->myname_length = strlen(sp->myauth.name)+1; 4961 } else { 4962 if (sp->myauth.name == NULL) { 4963 cfg->myname_length = 0; 4964 } else { 4965 len = strlen(sp->myauth.name)+1; 4966 if (cfg->myname_length < len) 4967 return (ENAMETOOLONG); 4968 error = copyout(sp->myauth.name, cfg->myname, len); 4969 if (error) return error; 4970 } 4971 } 4972 if (cfg->hisname_length == 0) { 4973 if(sp->hisauth.name != NULL) 4974 cfg->hisname_length = strlen(sp->hisauth.name)+1; 4975 } else { 4976 if (sp->hisauth.name == NULL) { 4977 cfg->hisname_length = 0; 4978 } else { 4979 len = strlen(sp->hisauth.name)+1; 4980 if (cfg->hisname_length < len) 4981 return (ENAMETOOLONG); 4982 error = copyout(sp->hisauth.name, cfg->hisname, len); 4983 if (error) return error; 4984 } 4985 } 4986 } 4987 break; 4988 case SPPPSETAUTHCFG: 4989 { 4990 struct spppauthcfg *cfg = (struct spppauthcfg*)data; 4991 int error; 4992 4993 if (sp->myauth.name) { 4994 free(sp->myauth.name, M_DEVBUF); 4995 sp->myauth.name = NULL; 4996 } 4997 if (sp->myauth.secret) { 4998 free(sp->myauth.secret, M_DEVBUF); 4999 sp->myauth.secret = NULL; 5000 } 5001 if (sp->hisauth.name) { 5002 free(sp->hisauth.name, M_DEVBUF); 5003 sp->hisauth.name = NULL; 5004 } 5005 if (sp->hisauth.secret) { 5006 free(sp->hisauth.secret, M_DEVBUF); 5007 sp->hisauth.secret = NULL; 5008 } 5009 5010 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5011 if (cfg->hisname_length >= MCLBYTES) 5012 return (ENAMETOOLONG); 5013 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5014 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5015 if (error) { 5016 free(sp->hisauth.name, M_DEVBUF); 5017 sp->hisauth.name = NULL; 5018 return error; 5019 } 5020 sp->hisauth.name[cfg->hisname_length-1] = 0; 5021 } 5022 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5023 if (cfg->hissecret_length >= MCLBYTES) 5024 return (ENAMETOOLONG); 5025 sp->hisauth.secret = malloc(cfg->hissecret_length, M_DEVBUF, M_WAITOK); 5026 error = copyin(cfg->hissecret, sp->hisauth.secret, cfg->hissecret_length); 5027 if (error) { 5028 free(sp->hisauth.secret, M_DEVBUF); 5029 sp->hisauth.secret = NULL; 5030 return error; 5031 } 5032 sp->hisauth.secret[cfg->hissecret_length-1] = 0; 5033 } 5034 if (cfg->myname != NULL && cfg->myname_length > 0) { 5035 if (cfg->myname_length >= MCLBYTES) 5036 return (ENAMETOOLONG); 5037 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5038 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5039 if (error) { 5040 free(sp->myauth.name, M_DEVBUF); 5041 sp->myauth.name = NULL; 5042 return error; 5043 } 5044 sp->myauth.name[cfg->myname_length-1] = 0; 5045 } 5046 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5047 if (cfg->mysecret_length >= MCLBYTES) 5048 return (ENAMETOOLONG); 5049 sp->myauth.secret = malloc(cfg->mysecret_length, M_DEVBUF, M_WAITOK); 5050 error = copyin(cfg->mysecret, sp->myauth.secret, cfg->mysecret_length); 5051 if (error) { 5052 free(sp->myauth.secret, M_DEVBUF); 5053 sp->myauth.secret = NULL; 5054 return error; 5055 } 5056 sp->myauth.secret[cfg->mysecret_length-1] = 0; 5057 } 5058 sp->myauth.flags = cfg->myauthflags; 5059 if (cfg->myauth) 5060 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5061 sp->hisauth.flags = cfg->hisauthflags; 5062 if (cfg->hisauth) 5063 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5064 sp->pp_auth_failures = 0; 5065 } 5066 break; 5067 case SPPPGETLCPCFG: 5068 { 5069 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5070 lcp->lcp_timeout = sp->lcp.timeout; 5071 } 5072 break; 5073 case SPPPSETLCPCFG: 5074 { 5075 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5076 sp->lcp.timeout = lcp->lcp_timeout; 5077 } 5078 break; 5079 case SPPPGETSTATUS: 5080 { 5081 struct spppstatus *status = (struct spppstatus *)data; 5082 status->phase = sp->pp_phase; 5083 } 5084 break; 5085 case SPPPGETIDLETO: 5086 { 5087 struct spppidletimeout *to = (struct spppidletimeout *)data; 5088 to->idle_seconds = sp->pp_idle_timeout; 5089 } 5090 break; 5091 case SPPPSETIDLETO: 5092 { 5093 struct spppidletimeout *to = (struct spppidletimeout *)data; 5094 sp->pp_idle_timeout = to->idle_seconds; 5095 } 5096 break; 5097 case SPPPSETAUTHFAILURE: 5098 { 5099 struct spppauthfailuresettings *afsettings = (struct spppauthfailuresettings *)data; 5100 sp->pp_max_auth_fail = afsettings->max_failures; 5101 sp->pp_auth_failures = 0; 5102 } 5103 break; 5104 case SPPPGETAUTHFAILURES: 5105 { 5106 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5107 stats->auth_failures = sp->pp_auth_failures; 5108 stats->max_failures = sp->pp_max_auth_fail; 5109 } 5110 break; 5111 case SPPPSETDNSOPTS: 5112 { 5113 struct spppdnssettings *req = (struct spppdnssettings*)data; 5114 sp->query_dns = req->query_dns & 3; 5115 } 5116 break; 5117 case SPPPGETDNSOPTS: 5118 { 5119 struct spppdnssettings *req = (struct spppdnssettings*)data; 5120 req->query_dns = sp->query_dns; 5121 } 5122 break; 5123 case SPPPGETDNSADDRS: 5124 { 5125 struct spppdnsaddrs *addrs = (struct spppdnsaddrs*)data; 5126 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5127 } 5128 break; 5129 default: 5130 return (EINVAL); 5131 } 5132 5133 return (0); 5134 } 5135 5136 static void 5137 sppp_phase_network(struct sppp *sp) 5138 { 5139 STDDCL; 5140 int i; 5141 u_int32_t mask; 5142 5143 sp->pp_phase = SPPP_PHASE_NETWORK; 5144 5145 if(debug) 5146 { 5147 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 5148 sppp_phase_name(sp->pp_phase)); 5149 } 5150 5151 /* Notify NCPs now. */ 5152 for (i = 0; i < IDX_COUNT; i++) 5153 if ((cps[i])->flags & CP_NCP) 5154 (cps[i])->Open(sp); 5155 5156 /* Send Up events to all NCPs. */ 5157 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5158 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) 5159 (cps[i])->Up(sp); 5160 5161 /* if no NCP is starting, all this was in vain, close down */ 5162 sppp_lcp_check_and_close(sp); 5163 } 5164 5165 5166 static const char * 5167 sppp_cp_type_name(u_char type) 5168 { 5169 static char buf[12]; 5170 switch (type) { 5171 case CONF_REQ: return "conf-req"; 5172 case CONF_ACK: return "conf-ack"; 5173 case CONF_NAK: return "conf-nak"; 5174 case CONF_REJ: return "conf-rej"; 5175 case TERM_REQ: return "term-req"; 5176 case TERM_ACK: return "term-ack"; 5177 case CODE_REJ: return "code-rej"; 5178 case PROTO_REJ: return "proto-rej"; 5179 case ECHO_REQ: return "echo-req"; 5180 case ECHO_REPLY: return "echo-reply"; 5181 case DISC_REQ: return "discard-req"; 5182 } 5183 sprintf (buf, "0x%x", type); 5184 return buf; 5185 } 5186 5187 static const char * 5188 sppp_auth_type_name(u_short proto, u_char type) 5189 { 5190 static char buf[12]; 5191 switch (proto) { 5192 case PPP_CHAP: 5193 switch (type) { 5194 case CHAP_CHALLENGE: return "challenge"; 5195 case CHAP_RESPONSE: return "response"; 5196 case CHAP_SUCCESS: return "success"; 5197 case CHAP_FAILURE: return "failure"; 5198 } 5199 case PPP_PAP: 5200 switch (type) { 5201 case PAP_REQ: return "req"; 5202 case PAP_ACK: return "ack"; 5203 case PAP_NAK: return "nak"; 5204 } 5205 } 5206 sprintf (buf, "0x%x", type); 5207 return buf; 5208 } 5209 5210 static const char * 5211 sppp_lcp_opt_name(u_char opt) 5212 { 5213 static char buf[12]; 5214 switch (opt) { 5215 case LCP_OPT_MRU: return "mru"; 5216 case LCP_OPT_ASYNC_MAP: return "async-map"; 5217 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 5218 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 5219 case LCP_OPT_MAGIC: return "magic"; 5220 case LCP_OPT_PROTO_COMP: return "proto-comp"; 5221 case LCP_OPT_ADDR_COMP: return "addr-comp"; 5222 } 5223 sprintf (buf, "0x%x", opt); 5224 return buf; 5225 } 5226 5227 static const char * 5228 sppp_ipcp_opt_name(u_char opt) 5229 { 5230 static char buf[12]; 5231 switch (opt) { 5232 case IPCP_OPT_ADDRESSES: return "addresses"; 5233 case IPCP_OPT_COMPRESSION: return "compression"; 5234 case IPCP_OPT_ADDRESS: return "address"; 5235 } 5236 sprintf (buf, "0x%x", opt); 5237 return buf; 5238 } 5239 5240 #ifdef INET6 5241 static const char * 5242 sppp_ipv6cp_opt_name(u_char opt) 5243 { 5244 static char buf[12]; 5245 switch (opt) { 5246 case IPV6CP_OPT_IFID: return "ifid"; 5247 case IPV6CP_OPT_COMPRESSION: return "compression"; 5248 } 5249 sprintf (buf, "0x%x", opt); 5250 return buf; 5251 } 5252 #endif 5253 5254 static const char * 5255 sppp_state_name(int state) 5256 { 5257 switch (state) { 5258 case STATE_INITIAL: return "initial"; 5259 case STATE_STARTING: return "starting"; 5260 case STATE_CLOSED: return "closed"; 5261 case STATE_STOPPED: return "stopped"; 5262 case STATE_CLOSING: return "closing"; 5263 case STATE_STOPPING: return "stopping"; 5264 case STATE_REQ_SENT: return "req-sent"; 5265 case STATE_ACK_RCVD: return "ack-rcvd"; 5266 case STATE_ACK_SENT: return "ack-sent"; 5267 case STATE_OPENED: return "opened"; 5268 } 5269 return "illegal"; 5270 } 5271 5272 static const char * 5273 sppp_phase_name(int phase) 5274 { 5275 switch (phase) { 5276 case SPPP_PHASE_DEAD: return "dead"; 5277 case SPPP_PHASE_ESTABLISH: return "establish"; 5278 case SPPP_PHASE_TERMINATE: return "terminate"; 5279 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 5280 case SPPP_PHASE_NETWORK: return "network"; 5281 } 5282 return "illegal"; 5283 } 5284 5285 static const char * 5286 sppp_proto_name(u_short proto) 5287 { 5288 static char buf[12]; 5289 switch (proto) { 5290 case PPP_LCP: return "lcp"; 5291 case PPP_IPCP: return "ipcp"; 5292 case PPP_PAP: return "pap"; 5293 case PPP_CHAP: return "chap"; 5294 case PPP_IPV6CP: return "ipv6cp"; 5295 } 5296 sprintf(buf, "0x%x", (unsigned)proto); 5297 return buf; 5298 } 5299 5300 static void 5301 sppp_print_bytes(const u_char *p, u_short len) 5302 { 5303 addlog(" %02x", *p++); 5304 while (--len > 0) 5305 addlog("-%02x", *p++); 5306 } 5307 5308 static void 5309 sppp_print_string(const char *p, u_short len) 5310 { 5311 u_char c; 5312 5313 while (len-- > 0) { 5314 c = *p++; 5315 /* 5316 * Print only ASCII chars directly. RFC 1994 recommends 5317 * using only them, but we don't rely on it. */ 5318 if (c < ' ' || c > '~') 5319 addlog("\\x%x", c); 5320 else 5321 addlog("%c", c); 5322 } 5323 } 5324 5325 static const char * 5326 sppp_dotted_quad(u_int32_t addr) 5327 { 5328 static char s[16]; 5329 sprintf(s, "%d.%d.%d.%d", 5330 (int)((addr >> 24) & 0xff), 5331 (int)((addr >> 16) & 0xff), 5332 (int)((addr >> 8) & 0xff), 5333 (int)(addr & 0xff)); 5334 return s; 5335 } 5336 5337 /* a dummy, used to drop uninteresting events */ 5338 static void 5339 sppp_null(struct sppp *unused) 5340 { 5341 /* do just nothing */ 5342 } 5343 /* 5344 * This file is large. Tell emacs to highlight it nevertheless. 5345 * 5346 * Local Variables: 5347 * hilit-auto-highlight-maxout: 120000 5348 * End: 5349 */ 5350
Indexes created Fri Sep 26 20:09:58 GMT 2025