if_spppsubr.c revision 1.46.4.12
1 /* $NetBSD: if_spppsubr.c,v 1.46.4.12 2003/02/07 18:28:51 tron Exp $ */ 2 3 /* 4 * Synchronous PPP/Cisco link level subroutines. 5 * Keepalive protocol implemented in both Cisco and PPP modes. 6 * 7 * Copyright (C) 1994-1996 Cronyx Engineering Ltd. 8 * Author: Serge Vakulenko, <vak (at) cronyx.ru> 9 * 10 * Heavily revamped to conform to RFC 1661. 11 * Copyright (C) 1997, Joerg Wunsch. 12 * 13 * RFC2472 IPv6CP support. 14 * Copyright (C) 2000, Jun-ichiro itojun Hagino <itojun (at) iijlab.net>. 15 * 16 * This software is distributed with NO WARRANTIES, not even the implied 17 * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 18 * 19 * Authors grant any other persons or organisations permission to use 20 * or modify this software as long as this message is kept with the software, 21 * all derivative works or modified versions. 22 * 23 * From: Version 2.4, Thu Apr 30 17:17:21 MSD 1997 24 * 25 * From: if_spppsubr.c,v 1.39 1998/04/04 13:26:03 phk Exp 26 * 27 * From: Id: if_spppsubr.c,v 1.23 1999/02/23 14:47:50 hm Exp 28 */ 29 30 #include <sys/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: if_spppsubr.c,v 1.46.4.12 2003/02/07 18:28:51 tron 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 #include <sys/inttypes.h> 50 51 #include <net/if.h> 52 #include <net/netisr.h> 53 #include <net/if_types.h> 54 #include <net/route.h> 55 #include <net/ppp_defs.h> 56 57 #include <machine/stdarg.h> 58 59 #include <netinet/in.h> 60 #include <netinet/in_systm.h> 61 #include <netinet/in_var.h> 62 #ifdef INET 63 #include <netinet/ip.h> 64 #include <netinet/tcp.h> 65 #endif 66 #include <net/ethertypes.h> 67 68 #ifdef IPX 69 #include <netipx/ipx.h> 70 #include <netipx/ipx_if.h> 71 #endif 72 73 #ifdef NS 74 #include <netns/ns.h> 75 #include <netns/ns_if.h> 76 #endif 77 78 #ifdef ISO 79 #include <netiso/argo_debug.h> 80 #include <netiso/iso.h> 81 #include <netiso/iso_var.h> 82 #include <netiso/iso_snpac.h> 83 #endif 84 85 #include <net/if_sppp.h> 86 #include <net/if_spppvar.h> 87 88 #define LCP_KEEPALIVE_INTERVAL 10 /* seconds */ 89 #define MAXALIVECNT 3 /* max. missed alive packets */ 90 #define DEFAULT_MAX_AUTH_FAILURES 5 /* max. auth. failures */ 91 92 /* 93 * Interface flags that can be set in an ifconfig command. 94 * 95 * Setting link0 will make the link passive, i.e. it will be marked 96 * as being administrative openable, but won't be opened to begin 97 * with. Incoming calls will be answered, or subsequent calls with 98 * -link1 will cause the administrative open of the LCP layer. 99 * 100 * Setting link1 will cause the link to auto-dial only as packets 101 * arrive to be sent. 102 * 103 * Setting IFF_DEBUG will syslog the option negotiation and state 104 * transitions at level kern.debug. Note: all logs consistently look 105 * like 106 * 107 * <if-name><unit>: <proto-name> <additional info...> 108 * 109 * with <if-name><unit> being something like "bppp0", and <proto-name> 110 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc. 111 */ 112 113 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ 114 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */ 115 116 #define CONF_REQ 1 /* PPP configure request */ 117 #define CONF_ACK 2 /* PPP configure acknowledge */ 118 #define CONF_NAK 3 /* PPP configure negative ack */ 119 #define CONF_REJ 4 /* PPP configure reject */ 120 #define TERM_REQ 5 /* PPP terminate request */ 121 #define TERM_ACK 6 /* PPP terminate acknowledge */ 122 #define CODE_REJ 7 /* PPP code reject */ 123 #define PROTO_REJ 8 /* PPP protocol reject */ 124 #define ECHO_REQ 9 /* PPP echo request */ 125 #define ECHO_REPLY 10 /* PPP echo reply */ 126 #define DISC_REQ 11 /* PPP discard request */ 127 128 #define LCP_OPT_MRU 1 /* maximum receive unit */ 129 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */ 130 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ 131 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ 132 #define LCP_OPT_MAGIC 5 /* magic number */ 133 #define LCP_OPT_RESERVED 6 /* reserved */ 134 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ 135 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ 136 137 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ 138 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol */ 139 #define IPCP_OPT_ADDRESS 3 /* local IP address */ 140 #define IPCP_OPT_PRIMDNS 129 /* primary remote dns address */ 141 #define IPCP_OPT_SECDNS 131 /* secondary remote dns address */ 142 143 #define IPV6CP_OPT_IFID 1 /* interface identifier */ 144 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ 145 146 #define PAP_REQ 1 /* PAP name/password request */ 147 #define PAP_ACK 2 /* PAP acknowledge */ 148 #define PAP_NAK 3 /* PAP fail */ 149 150 #define CHAP_CHALLENGE 1 /* CHAP challenge request */ 151 #define CHAP_RESPONSE 2 /* CHAP challenge response */ 152 #define CHAP_SUCCESS 3 /* CHAP response ok */ 153 #define CHAP_FAILURE 4 /* CHAP response failed */ 154 155 #define CHAP_MD5 5 /* hash algorithm - MD5 */ 156 157 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */ 158 #define CISCO_UNICAST 0x0f /* Cisco unicast address */ 159 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ 160 #define CISCO_ADDR_REQ 0 /* Cisco address request */ 161 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */ 162 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ 163 164 /* states are named and numbered according to RFC 1661 */ 165 #define STATE_INITIAL 0 166 #define STATE_STARTING 1 167 #define STATE_CLOSED 2 168 #define STATE_STOPPED 3 169 #define STATE_CLOSING 4 170 #define STATE_STOPPING 5 171 #define STATE_REQ_SENT 6 172 #define STATE_ACK_RCVD 7 173 #define STATE_ACK_SENT 8 174 #define STATE_OPENED 9 175 176 struct ppp_header { 177 u_char address; 178 u_char control; 179 u_short protocol; 180 } __attribute__((__packed__)); 181 #define PPP_HEADER_LEN sizeof (struct ppp_header) 182 183 struct lcp_header { 184 u_char type; 185 u_char ident; 186 u_short len; 187 } __attribute__((__packed__)); 188 #define LCP_HEADER_LEN sizeof (struct lcp_header) 189 190 struct cisco_packet { 191 u_int32_t type; 192 u_int32_t par1; 193 u_int32_t par2; 194 u_short rel; 195 u_short time0; 196 u_short time1; 197 } __attribute__((__packed__)); 198 #define CISCO_PACKET_LEN 18 199 200 /* 201 * We follow the spelling and capitalization of RFC 1661 here, to make 202 * it easier comparing with the standard. Please refer to this RFC in 203 * case you can't make sense out of these abbreviation; it will also 204 * explain the semantics related to the various events and actions. 205 */ 206 struct cp { 207 u_short proto; /* PPP control protocol number */ 208 u_char protoidx; /* index into state table in struct sppp */ 209 u_char flags; 210 #define CP_LCP 0x01 /* this is the LCP */ 211 #define CP_AUTH 0x02 /* this is an authentication protocol */ 212 #define CP_NCP 0x04 /* this is a NCP */ 213 #define CP_QUAL 0x08 /* this is a quality reporting protocol */ 214 const char *name; /* name of this control protocol */ 215 /* event handlers */ 216 void (*Up)(struct sppp *sp); 217 void (*Down)(struct sppp *sp); 218 void (*Open)(struct sppp *sp); 219 void (*Close)(struct sppp *sp); 220 void (*TO)(void *sp); 221 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len); 222 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len); 223 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len); 224 /* actions */ 225 void (*tlu)(struct sppp *sp); 226 void (*tld)(struct sppp *sp); 227 void (*tls)(struct sppp *sp); 228 void (*tlf)(struct sppp *sp); 229 void (*scr)(struct sppp *sp); 230 }; 231 232 static struct sppp *spppq; 233 static struct callout keepalive_ch; 234 235 #ifdef __FreeBSD__ 236 #define SPP_FMT "%s%d: " 237 #define SPP_ARGS(ifp) (ifp)->if_name, (ifp)->if_unit 238 #else 239 #define SPP_FMT "%s: " 240 #define SPP_ARGS(ifp) (ifp)->if_xname 241 #endif 242 243 #ifdef INET 244 /* 245 * The following disgusting hack gets around the problem that IP TOS 246 * can't be set yet. We want to put "interactive" traffic on a high 247 * priority queue. To decide if traffic is interactive, we check that 248 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 249 * 250 * XXX is this really still necessary? - joerg - 251 */ 252 static u_short interactive_ports[8] = { 253 0, 513, 0, 0, 254 0, 21, 0, 23, 255 }; 256 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 257 #endif 258 259 /* almost every function needs these */ 260 #define STDDCL \ 261 struct ifnet *ifp = &sp->pp_if; \ 262 int debug = ifp->if_flags & IFF_DEBUG 263 264 static int sppp_output(struct ifnet *ifp, struct mbuf *m, 265 struct sockaddr *dst, struct rtentry *rt); 266 267 static void sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2); 268 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m); 269 270 static void sppp_cp_input(const struct cp *cp, struct sppp *sp, 271 struct mbuf *m); 272 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 273 u_char ident, u_short len, void *data); 274 /* static void sppp_cp_timeout(void *arg); */ 275 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp, 276 int newstate); 277 static void sppp_auth_send(const struct cp *cp, 278 struct sppp *sp, unsigned int type, unsigned int id, 279 ...); 280 281 static void sppp_up_event(const struct cp *cp, struct sppp *sp); 282 static void sppp_down_event(const struct cp *cp, struct sppp *sp); 283 static void sppp_open_event(const struct cp *cp, struct sppp *sp); 284 static void sppp_close_event(const struct cp *cp, struct sppp *sp); 285 static void sppp_to_event(const struct cp *cp, struct sppp *sp); 286 287 static void sppp_null(struct sppp *sp); 288 289 static void sppp_lcp_init(struct sppp *sp); 290 static void sppp_lcp_up(struct sppp *sp); 291 static void sppp_lcp_down(struct sppp *sp); 292 static void sppp_lcp_open(struct sppp *sp); 293 static void sppp_lcp_close(struct sppp *sp); 294 static void sppp_lcp_TO(void *sp); 295 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 296 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 297 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 298 static void sppp_lcp_tlu(struct sppp *sp); 299 static void sppp_lcp_tld(struct sppp *sp); 300 static void sppp_lcp_tls(struct sppp *sp); 301 static void sppp_lcp_tlf(struct sppp *sp); 302 static void sppp_lcp_scr(struct sppp *sp); 303 static void sppp_lcp_check_and_close(struct sppp *sp); 304 static int sppp_ncp_check(struct sppp *sp); 305 306 static void sppp_ipcp_init(struct sppp *sp); 307 static void sppp_ipcp_up(struct sppp *sp); 308 static void sppp_ipcp_down(struct sppp *sp); 309 static void sppp_ipcp_open(struct sppp *sp); 310 static void sppp_ipcp_close(struct sppp *sp); 311 static void sppp_ipcp_TO(void *sp); 312 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 313 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 314 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 315 static void sppp_ipcp_tlu(struct sppp *sp); 316 static void sppp_ipcp_tld(struct sppp *sp); 317 static void sppp_ipcp_tls(struct sppp *sp); 318 static void sppp_ipcp_tlf(struct sppp *sp); 319 static void sppp_ipcp_scr(struct sppp *sp); 320 321 static void sppp_ipv6cp_init(struct sppp *sp); 322 static void sppp_ipv6cp_up(struct sppp *sp); 323 static void sppp_ipv6cp_down(struct sppp *sp); 324 static void sppp_ipv6cp_open(struct sppp *sp); 325 static void sppp_ipv6cp_close(struct sppp *sp); 326 static void sppp_ipv6cp_TO(void *sp); 327 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len); 328 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 329 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 330 static void sppp_ipv6cp_tlu(struct sppp *sp); 331 static void sppp_ipv6cp_tld(struct sppp *sp); 332 static void sppp_ipv6cp_tls(struct sppp *sp); 333 static void sppp_ipv6cp_tlf(struct sppp *sp); 334 static void sppp_ipv6cp_scr(struct sppp *sp); 335 336 static void sppp_pap_input(struct sppp *sp, struct mbuf *m); 337 static void sppp_pap_init(struct sppp *sp); 338 static void sppp_pap_open(struct sppp *sp); 339 static void sppp_pap_close(struct sppp *sp); 340 static void sppp_pap_TO(void *sp); 341 static void sppp_pap_my_TO(void *sp); 342 static void sppp_pap_tlu(struct sppp *sp); 343 static void sppp_pap_tld(struct sppp *sp); 344 static void sppp_pap_scr(struct sppp *sp); 345 346 static void sppp_chap_input(struct sppp *sp, struct mbuf *m); 347 static void sppp_chap_init(struct sppp *sp); 348 static void sppp_chap_open(struct sppp *sp); 349 static void sppp_chap_close(struct sppp *sp); 350 static void sppp_chap_TO(void *sp); 351 static void sppp_chap_tlu(struct sppp *sp); 352 static void sppp_chap_tld(struct sppp *sp); 353 static void sppp_chap_scr(struct sppp *sp); 354 355 static const char *sppp_auth_type_name(u_short proto, u_char type); 356 static const char *sppp_cp_type_name(u_char type); 357 static const char *sppp_dotted_quad(u_int32_t addr); 358 static const char *sppp_ipcp_opt_name(u_char opt); 359 #ifdef INET6 360 static const char *sppp_ipv6cp_opt_name(u_char opt); 361 #endif 362 static const char *sppp_lcp_opt_name(u_char opt); 363 static const char *sppp_phase_name(int phase); 364 static const char *sppp_proto_name(u_short proto); 365 static const char *sppp_state_name(int state); 366 static int sppp_params(struct sppp *sp, int cmd, void *data); 367 static void sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, 368 u_int32_t *srcmask); 369 static void sppp_keepalive(void *dummy); 370 static void sppp_phase_network(struct sppp *sp); 371 static void sppp_print_bytes(const u_char *p, u_short len); 372 static void sppp_print_string(const char *p, u_short len); 373 static void sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr); 374 static void sppp_clear_ip_addrs(struct sppp *sp); 375 #ifdef INET6 376 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, 377 struct in6_addr *dst, struct in6_addr *srcmask); 378 #ifdef IPV6CP_MYIFID_DYN 379 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src); 380 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src); 381 #endif 382 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src); 383 #endif 384 385 /* our control protocol descriptors */ 386 static const struct cp lcp = { 387 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 388 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close, 389 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak, 390 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf, 391 sppp_lcp_scr 392 }; 393 394 static const struct cp ipcp = { 395 PPP_IPCP, IDX_IPCP, 396 #ifdef INET 397 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 398 #else 399 0, 400 #endif 401 "ipcp", 402 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close, 403 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak, 404 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf, 405 sppp_ipcp_scr 406 }; 407 408 static const struct cp ipv6cp = { 409 PPP_IPV6CP, IDX_IPV6CP, 410 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 411 CP_NCP, 412 #else 413 0, 414 #endif 415 "ipv6cp", 416 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close, 417 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak, 418 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf, 419 sppp_ipv6cp_scr 420 }; 421 422 static const struct cp pap = { 423 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 424 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close, 425 sppp_pap_TO, 0, 0, 0, 426 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null, 427 sppp_pap_scr 428 }; 429 430 static const struct cp chap = { 431 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 432 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close, 433 sppp_chap_TO, 0, 0, 0, 434 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null, 435 sppp_chap_scr 436 }; 437 438 static const struct cp *cps[IDX_COUNT] = { 439 &lcp, /* IDX_LCP */ 440 &ipcp, /* IDX_IPCP */ 441 &ipv6cp, /* IDX_IPV6CP */ 442 &pap, /* IDX_PAP */ 443 &chap, /* IDX_CHAP */ 444 }; 445 446 447 /* 448 * Exported functions, comprising our interface to the lower layer. 449 */ 450 451 /* 452 * Process the received packet. 453 */ 454 void 455 sppp_input(struct ifnet *ifp, struct mbuf *m) 456 { 457 struct ppp_header *h = NULL; 458 struct ifqueue *inq = 0; 459 u_int16_t protocol; 460 int s; 461 struct sppp *sp = (struct sppp *)ifp; 462 int debug = ifp->if_flags & IFF_DEBUG; 463 464 if (ifp->if_flags & IFF_UP) 465 /* Count received bytes, add hardware framing */ 466 ifp->if_ibytes += m->m_pkthdr.len + sp->pp_framebytes; 467 468 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 469 /* Too small packet, drop it. */ 470 if (debug) 471 log(LOG_DEBUG, 472 SPP_FMT "input packet is too small, %d bytes\n", 473 SPP_ARGS(ifp), m->m_pkthdr.len); 474 drop: 475 ++ifp->if_ierrors; 476 ++ifp->if_iqdrops; 477 m_freem (m); 478 return; 479 } 480 481 if (sp->pp_flags & PP_NOFRAMING) { 482 memcpy(&protocol, mtod(m, void *), 2); 483 protocol = ntohs(protocol); 484 m_adj(m, 2); 485 } else { 486 487 /* Get PPP header. */ 488 h = mtod (m, struct ppp_header*); 489 m_adj (m, PPP_HEADER_LEN); 490 491 switch (h->address) { 492 case PPP_ALLSTATIONS: 493 if (h->control != PPP_UI) 494 goto invalid; 495 if (sp->pp_flags & PP_CISCO) { 496 if (debug) 497 log(LOG_DEBUG, 498 SPP_FMT "PPP packet in Cisco mode " 499 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 500 SPP_ARGS(ifp), 501 h->address, h->control, ntohs(h->protocol)); 502 goto drop; 503 } 504 break; 505 case CISCO_MULTICAST: 506 case CISCO_UNICAST: 507 /* Don't check the control field here (RFC 1547). */ 508 if (! (sp->pp_flags & PP_CISCO)) { 509 if (debug) 510 log(LOG_DEBUG, 511 SPP_FMT "Cisco packet in PPP mode " 512 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 513 SPP_ARGS(ifp), 514 h->address, h->control, ntohs(h->protocol)); 515 goto drop; 516 } 517 switch (ntohs (h->protocol)) { 518 default: 519 ++ifp->if_noproto; 520 goto invalid; 521 case CISCO_KEEPALIVE: 522 sppp_cisco_input ((struct sppp*) ifp, m); 523 m_freem (m); 524 return; 525 #ifdef INET 526 case ETHERTYPE_IP: 527 schednetisr (NETISR_IP); 528 inq = &ipintrq; 529 break; 530 #endif 531 #ifdef INET6 532 case ETHERTYPE_IPV6: 533 schednetisr (NETISR_IPV6); 534 inq = &ip6intrq; 535 break; 536 #endif 537 #ifdef IPX 538 case ETHERTYPE_IPX: 539 schednetisr (NETISR_IPX); 540 inq = &ipxintrq; 541 break; 542 #endif 543 #ifdef NS 544 case ETHERTYPE_NS: 545 schednetisr (NETISR_NS); 546 inq = &nsintrq; 547 break; 548 #endif 549 } 550 goto queue_pkt; 551 default: /* Invalid PPP packet. */ 552 invalid: 553 if (debug) 554 log(LOG_DEBUG, 555 SPP_FMT "invalid input packet " 556 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 557 SPP_ARGS(ifp), 558 h->address, h->control, ntohs(h->protocol)); 559 goto drop; 560 } 561 protocol = ntohs (h->protocol); 562 } 563 564 switch (protocol) { 565 default: 566 if (sp->state[IDX_LCP] == STATE_OPENED) { 567 u_int16_t prot = htons(protocol); 568 sppp_cp_send (sp, PPP_LCP, PROTO_REJ, 569 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2, 570 &prot); 571 } 572 if (debug) 573 log(LOG_DEBUG, 574 SPP_FMT "invalid input protocol " 575 "<proto=0x%x>\n", SPP_ARGS(ifp), ntohs(protocol)); 576 ++ifp->if_noproto; 577 goto drop; 578 case PPP_LCP: 579 sppp_cp_input(&lcp, sp, m); 580 m_freem (m); 581 return; 582 case PPP_PAP: 583 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 584 sppp_pap_input(sp, m); 585 m_freem (m); 586 return; 587 case PPP_CHAP: 588 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 589 sppp_chap_input(sp, m); 590 m_freem (m); 591 return; 592 #ifdef INET 593 case PPP_IPCP: 594 if (sp->pp_phase == SPPP_PHASE_NETWORK) 595 sppp_cp_input(&ipcp, sp, m); 596 m_freem (m); 597 return; 598 case PPP_IP: 599 if (sp->state[IDX_IPCP] == STATE_OPENED) { 600 schednetisr (NETISR_IP); 601 inq = &ipintrq; 602 sp->pp_last_activity = mono_time.tv_sec; 603 } 604 break; 605 #endif 606 #ifdef INET6 607 case PPP_IPV6CP: 608 if (sp->pp_phase == SPPP_PHASE_NETWORK) 609 sppp_cp_input(&ipv6cp, sp, m); 610 m_freem (m); 611 return; 612 613 case PPP_IPV6: 614 if (sp->state[IDX_IPV6CP] == STATE_OPENED) { 615 schednetisr (NETISR_IPV6); 616 inq = &ip6intrq; 617 sp->pp_last_activity = mono_time.tv_sec; 618 } 619 break; 620 #endif 621 #ifdef IPX 622 case PPP_IPX: 623 /* IPX IPXCP not implemented yet */ 624 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 625 schednetisr (NETISR_IPX); 626 inq = &ipxintrq; 627 } 628 break; 629 #endif 630 #ifdef NS 631 case PPP_XNS: 632 /* XNS IDPCP not implemented yet */ 633 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 634 schednetisr (NETISR_NS); 635 inq = &nsintrq; 636 } 637 break; 638 #endif 639 #ifdef ISO 640 case PPP_ISO: 641 /* OSI NLCP not implemented yet */ 642 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 643 schednetisr (NETISR_ISO); 644 inq = &clnlintrq; 645 } 646 break; 647 #endif 648 } 649 650 queue_pkt: 651 if (! (ifp->if_flags & IFF_UP) || ! inq) 652 goto drop; 653 654 /* Check queue. */ 655 s = splnet(); 656 if (IF_QFULL (inq)) { 657 /* Queue overflow. */ 658 IF_DROP(inq); 659 splx(s); 660 if (debug) 661 log(LOG_DEBUG, SPP_FMT "protocol queue overflow\n", 662 SPP_ARGS(ifp)); 663 goto drop; 664 } 665 IF_ENQUEUE(inq, m); 666 splx(s); 667 } 668 669 /* 670 * Enqueue transmit packet. 671 */ 672 static int 673 sppp_output(struct ifnet *ifp, struct mbuf *m, 674 struct sockaddr *dst, struct rtentry *rt) 675 { 676 struct sppp *sp = (struct sppp*) ifp; 677 struct ppp_header *h = NULL; 678 struct ifqueue *ifq = NULL; /* XXX */ 679 int s, len, rv = 0; 680 u_int16_t protocol; 681 ALTQ_DECL(struct altq_pktattr pktattr;) 682 683 s = splnet(); 684 685 sp->pp_last_activity = mono_time.tv_sec; 686 687 if ((ifp->if_flags & IFF_UP) == 0 || 688 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 689 m_freem (m); 690 splx (s); 691 return (ENETDOWN); 692 } 693 694 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 695 /* 696 * Interface is not yet running, but auto-dial. Need 697 * to start LCP for it. 698 */ 699 ifp->if_flags |= IFF_RUNNING; 700 splx(s); 701 lcp.Open(sp); 702 s = splnet(); 703 } 704 705 /* 706 * If the queueing discipline needs packet classification, 707 * do it before prepending link headers. 708 */ 709 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family, &pktattr); 710 711 #ifdef INET 712 if (dst->sa_family == AF_INET) { 713 struct ip *ip = NULL; 714 struct tcphdr *th = NULL; 715 716 if (m->m_len >= sizeof(struct ip)) { 717 ip = mtod (m, struct ip*); 718 if (ip->ip_p == IPPROTO_TCP && 719 m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) + 720 sizeof(struct tcphdr)) { 721 th = (struct tcphdr *) 722 ((caddr_t)ip + (ip->ip_hl << 2)); 723 } 724 } else 725 ip = NULL; 726 727 /* 728 * When using dynamic local IP address assignment by using 729 * 0.0.0.0 as a local address, the first TCP session will 730 * not connect because the local TCP checksum is computed 731 * using 0.0.0.0 which will later become our real IP address 732 * so the TCP checksum computed at the remote end will 733 * become invalid. So we 734 * - don't let packets with src ip addr 0 thru 735 * - we flag TCP packets with src ip 0 as an error 736 */ 737 if (ip && ip->ip_src.s_addr == INADDR_ANY) { 738 u_int8_t proto = ip->ip_p; 739 740 m_freem(m); 741 splx(s); 742 if (proto == IPPROTO_TCP) 743 return(EADDRNOTAVAIL); 744 else 745 return(0); 746 } 747 748 /* 749 * Put low delay, telnet, rlogin and ftp control packets 750 * in front of the queue. 751 */ 752 753 if (!IF_QFULL(&sp->pp_fastq) && 754 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || 755 (th && (INTERACTIVE(ntohs(th->th_sport)) || 756 INTERACTIVE(ntohs(th->th_dport)))))) 757 ifq = &sp->pp_fastq; 758 } 759 #endif 760 761 #ifdef INET6 762 if (dst->sa_family == AF_INET6) { 763 /* XXX do something tricky here? */ 764 } 765 #endif 766 767 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 768 /* 769 * Prepend general data packet PPP header. For now, IP only. 770 */ 771 M_PREPEND (m, PPP_HEADER_LEN, M_DONTWAIT); 772 if (! m) { 773 if (ifp->if_flags & IFF_DEBUG) 774 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 775 SPP_ARGS(ifp)); 776 ++ifp->if_oerrors; 777 splx (s); 778 return (ENOBUFS); 779 } 780 /* 781 * May want to check size of packet 782 * (albeit due to the implementation it's always enough) 783 */ 784 h = mtod (m, struct ppp_header*); 785 if (sp->pp_flags & PP_CISCO) { 786 h->address = CISCO_UNICAST; /* unicast address */ 787 h->control = 0; 788 } else { 789 h->address = PPP_ALLSTATIONS; /* broadcast address */ 790 h->control = PPP_UI; /* Unnumbered Info */ 791 } 792 } 793 794 switch (dst->sa_family) { 795 #ifdef INET 796 case AF_INET: /* Internet Protocol */ 797 if (sp->pp_flags & PP_CISCO) 798 protocol = htons (ETHERTYPE_IP); 799 else { 800 /* 801 * Don't choke with an ENETDOWN early. It's 802 * possible that we just started dialing out, 803 * so don't drop the packet immediately. If 804 * we notice that we run out of buffer space 805 * below, we will however remember that we are 806 * not ready to carry IP packets, and return 807 * ENETDOWN, as opposed to ENOBUFS. 808 */ 809 protocol = htons(PPP_IP); 810 if (sp->state[IDX_IPCP] != STATE_OPENED) 811 rv = ENETDOWN; 812 } 813 break; 814 #endif 815 #ifdef INET6 816 case AF_INET6: /* Internet Protocol version 6 */ 817 if (sp->pp_flags & PP_CISCO) 818 protocol = htons (ETHERTYPE_IPV6); 819 else { 820 /* 821 * Don't choke with an ENETDOWN early. It's 822 * possible that we just started dialing out, 823 * so don't drop the packet immediately. If 824 * we notice that we run out of buffer space 825 * below, we will however remember that we are 826 * not ready to carry IP packets, and return 827 * ENETDOWN, as opposed to ENOBUFS. 828 */ 829 protocol = htons(PPP_IPV6); 830 if (sp->state[IDX_IPV6CP] != STATE_OPENED) 831 rv = ENETDOWN; 832 } 833 break; 834 #endif 835 #ifdef NS 836 case AF_NS: /* Xerox NS Protocol */ 837 protocol = htons ((sp->pp_flags & PP_CISCO) ? 838 ETHERTYPE_NS : PPP_XNS); 839 break; 840 #endif 841 #ifdef IPX 842 case AF_IPX: /* Novell IPX Protocol */ 843 protocol = htons ((sp->pp_flags & PP_CISCO) ? 844 ETHERTYPE_IPX : PPP_IPX); 845 break; 846 #endif 847 #ifdef ISO 848 case AF_ISO: /* ISO OSI Protocol */ 849 if (sp->pp_flags & PP_CISCO) 850 goto nosupport; 851 protocol = htons (PPP_ISO); 852 break; 853 nosupport: 854 #endif 855 default: 856 m_freem (m); 857 ++ifp->if_oerrors; 858 splx (s); 859 return (EAFNOSUPPORT); 860 } 861 862 if (sp->pp_flags & PP_NOFRAMING) { 863 M_PREPEND (m, 2, M_DONTWAIT); 864 if (m == NULL) { 865 if (ifp->if_flags & IFF_DEBUG) 866 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 867 SPP_ARGS(ifp)); 868 ++ifp->if_oerrors; 869 splx (s); 870 return (ENOBUFS); 871 } 872 *mtod(m, u_int16_t*) = protocol; 873 } else { 874 h->protocol = protocol; 875 } 876 877 /* 878 * Queue message on interface, and start output if interface 879 * not yet active. 880 */ 881 len = m->m_pkthdr.len; 882 if (ifq != NULL 883 #ifdef ALTQ 884 && ALTQ_IS_ENABLED(&ifp->if_snd) == 0 885 #endif 886 ) { 887 if (IF_QFULL (ifq)) { 888 IF_DROP (&ifp->if_snd); 889 m_freem (m); 890 if (rv == 0) 891 rv = ENOBUFS; 892 } 893 else 894 IF_ENQUEUE(ifq, m); 895 } else 896 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, rv); 897 if (rv != 0) { 898 ++ifp->if_oerrors; 899 splx(s); 900 return (rv); 901 } 902 903 if (! (ifp->if_flags & IFF_OACTIVE)) 904 (*ifp->if_start) (ifp); 905 906 /* 907 * Count output packets and bytes. 908 * The packet length includes header + additional hardware framing 909 * according to RFC 1333. 910 */ 911 ifp->if_obytes += len + sp->pp_framebytes; 912 splx (s); 913 return (0); 914 } 915 916 void 917 sppp_attach(struct ifnet *ifp) 918 { 919 struct sppp *sp = (struct sppp*) ifp; 920 921 /* Initialize keepalive handler. */ 922 if (! spppq) { 923 callout_init(&keepalive_ch); 924 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 925 } 926 927 /* Insert new entry into the keepalive list. */ 928 sp->pp_next = spppq; 929 spppq = sp; 930 931 sp->pp_if.if_type = IFT_PPP; 932 sp->pp_if.if_output = sppp_output; 933 sp->pp_fastq.ifq_maxlen = 32; 934 sp->pp_cpq.ifq_maxlen = 20; 935 sp->pp_loopcnt = 0; 936 sp->pp_alivecnt = 0; 937 sp->pp_last_activity = 0; 938 sp->pp_idle_timeout = 0; 939 memset(&sp->pp_seq[0], 0, sizeof(sp->pp_seq)); 940 memset(&sp->pp_rseq[0], 0, sizeof(sp->pp_rseq)); 941 sp->pp_auth_failures = 0; 942 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 943 sp->pp_phase = SPPP_PHASE_DEAD; 944 sp->pp_up = lcp.Up; 945 sp->pp_down = lcp.Down; 946 947 if_alloc_sadl(ifp); 948 949 memset(&sp->myauth, 0, sizeof sp->myauth); 950 memset(&sp->hisauth, 0, sizeof sp->hisauth); 951 sppp_lcp_init(sp); 952 sppp_ipcp_init(sp); 953 sppp_ipv6cp_init(sp); 954 sppp_pap_init(sp); 955 sppp_chap_init(sp); 956 } 957 958 void 959 sppp_detach(struct ifnet *ifp) 960 { 961 struct sppp **q, *p, *sp = (struct sppp*) ifp; 962 int i; 963 964 /* Remove the entry from the keepalive list. */ 965 for (q = &spppq; (p = *q); q = &p->pp_next) 966 if (p == sp) { 967 *q = p->pp_next; 968 break; 969 } 970 971 /* Stop keepalive handler. */ 972 if (! spppq) { 973 callout_stop(&keepalive_ch); 974 } 975 976 for (i = 0; i < IDX_COUNT; i++) { 977 callout_stop(&sp->ch[i]); 978 } 979 callout_stop(&sp->pap_my_to_ch); 980 981 /* free authentication info */ 982 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 983 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 984 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 985 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 986 987 if_free_sadl(ifp); 988 } 989 990 /* 991 * Flush the interface output queue. 992 */ 993 void 994 sppp_flush(struct ifnet *ifp) 995 { 996 struct sppp *sp = (struct sppp*) ifp; 997 998 IFQ_PURGE (&sp->pp_if.if_snd); 999 IF_PURGE (&sp->pp_fastq); 1000 IF_PURGE (&sp->pp_cpq); 1001 } 1002 1003 /* 1004 * Check if the output queue is empty. 1005 */ 1006 int 1007 sppp_isempty(struct ifnet *ifp) 1008 { 1009 struct sppp *sp = (struct sppp*) ifp; 1010 int empty, s; 1011 1012 s = splnet(); 1013 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1014 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1015 splx(s); 1016 return (empty); 1017 } 1018 1019 /* 1020 * Get next packet to send. 1021 */ 1022 struct mbuf * 1023 sppp_dequeue(struct ifnet *ifp) 1024 { 1025 struct sppp *sp = (struct sppp*) ifp; 1026 struct mbuf *m; 1027 int s; 1028 1029 s = splnet(); 1030 /* 1031 * Process only the control protocol queue until we have at 1032 * least one NCP open. 1033 * 1034 * Do always serve all three queues in Cisco mode. 1035 */ 1036 IF_DEQUEUE(&sp->pp_cpq, m); 1037 if (m == NULL && 1038 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { 1039 IF_DEQUEUE(&sp->pp_fastq, m); 1040 if (m == NULL) 1041 IF_DEQUEUE (&sp->pp_if.if_snd, m); 1042 } 1043 splx(s); 1044 return m; 1045 } 1046 1047 /* 1048 * Pick the next packet, do not remove it from the queue. 1049 */ 1050 struct mbuf * 1051 sppp_pick(struct ifnet *ifp) 1052 { 1053 struct sppp *sp = (struct sppp*)ifp; 1054 struct mbuf *m; 1055 int s; 1056 1057 s= splnet (); 1058 1059 m = sp->pp_cpq.ifq_head; 1060 if (m == NULL && 1061 (sp->pp_phase == SPPP_PHASE_NETWORK || 1062 (sp->pp_flags & PP_CISCO) != 0)) 1063 if ((m = sp->pp_fastq.ifq_head) == NULL) 1064 m = sp->pp_if.if_snd.ifq_head; 1065 splx (s); 1066 return (m); 1067 } 1068 1069 /* 1070 * Process an ioctl request. Called on low priority level. 1071 */ 1072 int 1073 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1074 { 1075 struct ifreq *ifr = (struct ifreq*) data; 1076 struct sppp *sp = (struct sppp*) ifp; 1077 int s, error=0, going_up, going_down, newmode; 1078 1079 s = splnet(); 1080 switch (cmd) { 1081 case SIOCAIFADDR: 1082 case SIOCSIFDSTADDR: 1083 break; 1084 1085 case SIOCSIFADDR: 1086 if_up(ifp); 1087 /* fall through... */ 1088 1089 case SIOCSIFFLAGS: 1090 going_up = ifp->if_flags & IFF_UP && 1091 (ifp->if_flags & IFF_RUNNING) == 0; 1092 going_down = (ifp->if_flags & IFF_UP) == 0 && 1093 ifp->if_flags & IFF_RUNNING; 1094 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1095 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1096 /* sanity */ 1097 newmode = IFF_PASSIVE; 1098 ifp->if_flags &= ~IFF_AUTO; 1099 } 1100 1101 if (going_up || going_down) 1102 lcp.Close(sp); 1103 if (going_up && newmode == 0) { 1104 /* neither auto-dial nor passive */ 1105 ifp->if_flags |= IFF_RUNNING; 1106 if (!(sp->pp_flags & PP_CISCO)) 1107 lcp.Open(sp); 1108 } else if (going_down) { 1109 sppp_flush(ifp); 1110 ifp->if_flags &= ~IFF_RUNNING; 1111 } 1112 1113 break; 1114 1115 #ifdef SIOCSIFMTU 1116 #ifndef ifr_mtu 1117 #define ifr_mtu ifr_metric 1118 #endif 1119 case SIOCSIFMTU: 1120 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru) 1121 return (EINVAL); 1122 ifp->if_mtu = ifr->ifr_mtu; 1123 break; 1124 #endif 1125 #ifdef SLIOCSETMTU 1126 case SLIOCSETMTU: 1127 if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru) 1128 return (EINVAL); 1129 ifp->if_mtu = *(short*)data; 1130 break; 1131 #endif 1132 #ifdef SIOCGIFMTU 1133 case SIOCGIFMTU: 1134 ifr->ifr_mtu = ifp->if_mtu; 1135 break; 1136 #endif 1137 #ifdef SLIOCGETMTU 1138 case SLIOCGETMTU: 1139 *(short*)data = ifp->if_mtu; 1140 break; 1141 #endif 1142 case SIOCADDMULTI: 1143 case SIOCDELMULTI: 1144 break; 1145 1146 case SPPPSETAUTHCFG: 1147 case SPPPSETLCPCFG: 1148 case SPPPSETIDLETO: 1149 case SPPPSETAUTHFAILURE: 1150 case SPPPSETDNSOPTS: 1151 { 1152 struct proc *p = curproc; /* XXX */ 1153 1154 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1155 break; 1156 } 1157 /* FALLTHROUGH */ 1158 case SPPPGETAUTHCFG: 1159 case SPPPGETLCPCFG: 1160 case SPPPGETSTATUS: 1161 case SPPPGETIDLETO: 1162 case SPPPGETAUTHFAILURES: 1163 case SPPPGETDNSOPTS: 1164 case SPPPGETDNSADDRS: 1165 error = sppp_params(sp, cmd, data); 1166 break; 1167 1168 default: 1169 error = ENOTTY; 1170 } 1171 splx(s); 1172 return (error); 1173 } 1174 1175 1176 /* 1177 * Cisco framing implementation. 1178 */ 1179 1180 /* 1181 * Handle incoming Cisco keepalive protocol packets. 1182 */ 1183 static void 1184 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1185 { 1186 STDDCL; 1187 struct cisco_packet *h; 1188 u_int32_t me, mymask; 1189 1190 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1191 if (debug) 1192 log(LOG_DEBUG, 1193 SPP_FMT "cisco invalid packet length: %d bytes\n", 1194 SPP_ARGS(ifp), m->m_pkthdr.len); 1195 return; 1196 } 1197 h = mtod (m, struct cisco_packet*); 1198 if (debug) 1199 log(LOG_DEBUG, 1200 SPP_FMT "cisco input: %d bytes " 1201 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1202 SPP_ARGS(ifp), m->m_pkthdr.len, 1203 ntohl (h->type), h->par1, h->par2, (u_int)h->rel, 1204 (u_int)h->time0, (u_int)h->time1); 1205 switch (ntohl (h->type)) { 1206 default: 1207 if (debug) 1208 addlog(SPP_FMT "cisco unknown packet type: 0x%x\n", 1209 SPP_ARGS(ifp), ntohl (h->type)); 1210 break; 1211 case CISCO_ADDR_REPLY: 1212 /* Reply on address request, ignore */ 1213 break; 1214 case CISCO_KEEPALIVE_REQ: 1215 sp->pp_alivecnt = 0; 1216 sp->pp_rseq[IDX_LCP] = ntohl (h->par1); 1217 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 1218 /* Local and remote sequence numbers are equal. 1219 * Probably, the line is in loopback mode. */ 1220 if (sp->pp_loopcnt >= MAXALIVECNT) { 1221 printf (SPP_FMT "loopback\n", 1222 SPP_ARGS(ifp)); 1223 sp->pp_loopcnt = 0; 1224 if (ifp->if_flags & IFF_UP) { 1225 if_down (ifp); 1226 IF_PURGE (&sp->pp_cpq); 1227 } 1228 } 1229 ++sp->pp_loopcnt; 1230 1231 /* Generate new local sequence number */ 1232 sp->pp_seq[IDX_LCP] = random(); 1233 break; 1234 } 1235 sp->pp_loopcnt = 0; 1236 if (! (ifp->if_flags & IFF_UP) && 1237 (ifp->if_flags & IFF_RUNNING)) { 1238 if_up(ifp); 1239 } 1240 break; 1241 case CISCO_ADDR_REQ: 1242 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1243 if (me != 0L) 1244 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1245 break; 1246 } 1247 } 1248 1249 /* 1250 * Send Cisco keepalive packet. 1251 */ 1252 static void 1253 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1254 { 1255 STDDCL; 1256 struct ppp_header *h; 1257 struct cisco_packet *ch; 1258 struct mbuf *m; 1259 u_int32_t t = (time.tv_sec - boottime.tv_sec) * 1000; 1260 1261 MGETHDR (m, M_DONTWAIT, MT_DATA); 1262 if (! m) 1263 return; 1264 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1265 m->m_pkthdr.rcvif = 0; 1266 1267 h = mtod (m, struct ppp_header*); 1268 h->address = CISCO_MULTICAST; 1269 h->control = 0; 1270 h->protocol = htons (CISCO_KEEPALIVE); 1271 1272 ch = (struct cisco_packet*) (h + 1); 1273 ch->type = htonl (type); 1274 ch->par1 = htonl (par1); 1275 ch->par2 = htonl (par2); 1276 ch->rel = -1; 1277 1278 ch->time0 = htons ((u_short) (t >> 16)); 1279 ch->time1 = htons ((u_short) t); 1280 1281 if (debug) 1282 log(LOG_DEBUG, 1283 SPP_FMT "cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1284 SPP_ARGS(ifp), ntohl (ch->type), ch->par1, 1285 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1286 (u_int)ch->time1); 1287 1288 if (IF_QFULL (&sp->pp_cpq)) { 1289 IF_DROP (&sp->pp_fastq); 1290 IF_DROP (&ifp->if_snd); 1291 m_freem (m); 1292 ++ifp->if_oerrors; 1293 return; 1294 } else 1295 IF_ENQUEUE (&sp->pp_cpq, m); 1296 if (! (ifp->if_flags & IFF_OACTIVE)) 1297 (*ifp->if_start) (ifp); 1298 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1299 } 1300 1301 /* 1302 * PPP protocol implementation. 1303 */ 1304 1305 /* 1306 * Send PPP control protocol packet. 1307 */ 1308 static void 1309 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1310 u_char ident, u_short len, void *data) 1311 { 1312 STDDCL; 1313 struct lcp_header *lh; 1314 struct mbuf *m; 1315 size_t pkthdrlen; 1316 1317 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1318 1319 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1320 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1321 MGETHDR (m, M_DONTWAIT, MT_DATA); 1322 if (! m) 1323 return; 1324 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1325 m->m_pkthdr.rcvif = 0; 1326 1327 if (sp->pp_flags & PP_NOFRAMING) { 1328 *mtod(m, u_int16_t*) = htons(proto); 1329 lh = (struct lcp_header*)(mtod(m, u_int8_t*) + 2); 1330 } else { 1331 struct ppp_header *h; 1332 h = mtod (m, struct ppp_header*); 1333 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1334 h->control = PPP_UI; /* Unnumbered Info */ 1335 h->protocol = htons (proto); /* Link Control Protocol */ 1336 lh = (struct lcp_header*) (h + 1); 1337 } 1338 lh->type = type; 1339 lh->ident = ident; 1340 lh->len = htons (LCP_HEADER_LEN + len); 1341 if (len) 1342 bcopy (data, lh+1, len); 1343 1344 if (debug) { 1345 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 1346 SPP_ARGS(ifp), 1347 sppp_proto_name(proto), 1348 sppp_cp_type_name (lh->type), lh->ident, 1349 ntohs (lh->len)); 1350 if (len) 1351 sppp_print_bytes ((u_char*) (lh+1), len); 1352 addlog(">\n"); 1353 } 1354 if (IF_QFULL (&sp->pp_cpq)) { 1355 IF_DROP (&sp->pp_fastq); 1356 IF_DROP (&ifp->if_snd); 1357 m_freem (m); 1358 ++ifp->if_oerrors; 1359 return; 1360 } else 1361 IF_ENQUEUE (&sp->pp_cpq, m); 1362 if (! (ifp->if_flags & IFF_OACTIVE)) 1363 (*ifp->if_start) (ifp); 1364 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1365 } 1366 1367 /* 1368 * Handle incoming PPP control protocol packets. 1369 */ 1370 static void 1371 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1372 { 1373 STDDCL; 1374 struct lcp_header *h; 1375 int len = m->m_pkthdr.len; 1376 int rv; 1377 u_char *p; 1378 u_int32_t u32; 1379 1380 if (len < 4) { 1381 if (debug) 1382 log(LOG_DEBUG, 1383 SPP_FMT "%s invalid packet length: %d bytes\n", 1384 SPP_ARGS(ifp), cp->name, len); 1385 return; 1386 } 1387 h = mtod (m, struct lcp_header*); 1388 if (debug) { 1389 log(LOG_DEBUG, 1390 SPP_FMT "%s input(%s): <%s id=0x%x len=%d", 1391 SPP_ARGS(ifp), cp->name, 1392 sppp_state_name(sp->state[cp->protoidx]), 1393 sppp_cp_type_name (h->type), h->ident, ntohs (h->len)); 1394 if (len > 4) 1395 sppp_print_bytes ((u_char*) (h+1), len-4); 1396 addlog(">\n"); 1397 } 1398 if (len > ntohs (h->len)) 1399 len = ntohs (h->len); 1400 p = (u_char *)(h + 1); 1401 switch (h->type) { 1402 case CONF_REQ: 1403 if (len < 4) { 1404 if (debug) 1405 addlog(SPP_FMT "%s invalid conf-req length %d\n", 1406 SPP_ARGS(ifp), cp->name, 1407 len); 1408 ++ifp->if_ierrors; 1409 break; 1410 } 1411 /* handle states where RCR doesn't get a SCA/SCN */ 1412 switch (sp->state[cp->protoidx]) { 1413 case STATE_CLOSING: 1414 case STATE_STOPPING: 1415 return; 1416 case STATE_CLOSED: 1417 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1418 0, 0); 1419 return; 1420 } 1421 rv = (cp->RCR)(sp, h, len); 1422 switch (sp->state[cp->protoidx]) { 1423 case STATE_OPENED: 1424 (cp->tld)(sp); 1425 (cp->scr)(sp); 1426 /* fall through... */ 1427 case STATE_ACK_SENT: 1428 case STATE_REQ_SENT: 1429 sppp_cp_change_state(cp, sp, rv? 1430 STATE_ACK_SENT: STATE_REQ_SENT); 1431 break; 1432 case STATE_STOPPED: 1433 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1434 (cp->scr)(sp); 1435 sppp_cp_change_state(cp, sp, rv? 1436 STATE_ACK_SENT: STATE_REQ_SENT); 1437 break; 1438 case STATE_ACK_RCVD: 1439 if (rv) { 1440 sppp_cp_change_state(cp, sp, STATE_OPENED); 1441 if (debug) 1442 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1443 SPP_ARGS(ifp), 1444 cp->name); 1445 (cp->tlu)(sp); 1446 } else 1447 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1448 break; 1449 default: 1450 printf(SPP_FMT "%s illegal %s in state %s\n", 1451 SPP_ARGS(ifp), cp->name, 1452 sppp_cp_type_name(h->type), 1453 sppp_state_name(sp->state[cp->protoidx])); 1454 ++ifp->if_ierrors; 1455 } 1456 break; 1457 case CONF_ACK: 1458 if (h->ident != sp->confid[cp->protoidx]) { 1459 if (debug) 1460 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1461 SPP_ARGS(ifp), cp->name, 1462 h->ident, sp->confid[cp->protoidx]); 1463 ++ifp->if_ierrors; 1464 break; 1465 } 1466 switch (sp->state[cp->protoidx]) { 1467 case STATE_CLOSED: 1468 case STATE_STOPPED: 1469 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1470 break; 1471 case STATE_CLOSING: 1472 case STATE_STOPPING: 1473 break; 1474 case STATE_REQ_SENT: 1475 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1476 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1477 break; 1478 case STATE_OPENED: 1479 (cp->tld)(sp); 1480 /* fall through */ 1481 case STATE_ACK_RCVD: 1482 (cp->scr)(sp); 1483 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1484 break; 1485 case STATE_ACK_SENT: 1486 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1487 sppp_cp_change_state(cp, sp, STATE_OPENED); 1488 if (debug) 1489 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1490 SPP_ARGS(ifp), cp->name); 1491 (cp->tlu)(sp); 1492 break; 1493 default: 1494 printf(SPP_FMT "%s illegal %s in state %s\n", 1495 SPP_ARGS(ifp), cp->name, 1496 sppp_cp_type_name(h->type), 1497 sppp_state_name(sp->state[cp->protoidx])); 1498 ++ifp->if_ierrors; 1499 } 1500 break; 1501 case CONF_NAK: 1502 case CONF_REJ: 1503 if (h->ident != sp->confid[cp->protoidx]) { 1504 if (debug) 1505 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1506 SPP_ARGS(ifp), cp->name, 1507 h->ident, sp->confid[cp->protoidx]); 1508 ++ifp->if_ierrors; 1509 break; 1510 } 1511 if (h->type == CONF_NAK) 1512 (cp->RCN_nak)(sp, h, len); 1513 else /* CONF_REJ */ 1514 (cp->RCN_rej)(sp, h, len); 1515 1516 switch (sp->state[cp->protoidx]) { 1517 case STATE_CLOSED: 1518 case STATE_STOPPED: 1519 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1520 break; 1521 case STATE_REQ_SENT: 1522 case STATE_ACK_SENT: 1523 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1524 (cp->scr)(sp); 1525 break; 1526 case STATE_OPENED: 1527 (cp->tld)(sp); 1528 /* fall through */ 1529 case STATE_ACK_RCVD: 1530 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1531 (cp->scr)(sp); 1532 break; 1533 case STATE_CLOSING: 1534 case STATE_STOPPING: 1535 break; 1536 default: 1537 printf(SPP_FMT "%s illegal %s in state %s\n", 1538 SPP_ARGS(ifp), cp->name, 1539 sppp_cp_type_name(h->type), 1540 sppp_state_name(sp->state[cp->protoidx])); 1541 ++ifp->if_ierrors; 1542 } 1543 break; 1544 1545 case TERM_REQ: 1546 switch (sp->state[cp->protoidx]) { 1547 case STATE_ACK_RCVD: 1548 case STATE_ACK_SENT: 1549 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1550 /* fall through */ 1551 case STATE_CLOSED: 1552 case STATE_STOPPED: 1553 case STATE_CLOSING: 1554 case STATE_STOPPING: 1555 case STATE_REQ_SENT: 1556 sta: 1557 /* Send Terminate-Ack packet. */ 1558 if (debug) 1559 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n", 1560 SPP_ARGS(ifp), cp->name); 1561 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1562 break; 1563 case STATE_OPENED: 1564 (cp->tld)(sp); 1565 sp->rst_counter[cp->protoidx] = 0; 1566 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1567 goto sta; 1568 break; 1569 default: 1570 printf(SPP_FMT "%s illegal %s in state %s\n", 1571 SPP_ARGS(ifp), cp->name, 1572 sppp_cp_type_name(h->type), 1573 sppp_state_name(sp->state[cp->protoidx])); 1574 ++ifp->if_ierrors; 1575 } 1576 break; 1577 case TERM_ACK: 1578 switch (sp->state[cp->protoidx]) { 1579 case STATE_CLOSED: 1580 case STATE_STOPPED: 1581 case STATE_REQ_SENT: 1582 case STATE_ACK_SENT: 1583 break; 1584 case STATE_CLOSING: 1585 (cp->tlf)(sp); 1586 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1587 sppp_lcp_check_and_close(sp); 1588 break; 1589 case STATE_STOPPING: 1590 (cp->tlf)(sp); 1591 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1592 sppp_lcp_check_and_close(sp); 1593 break; 1594 case STATE_ACK_RCVD: 1595 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1596 break; 1597 case STATE_OPENED: 1598 (cp->tld)(sp); 1599 (cp->scr)(sp); 1600 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1601 break; 1602 default: 1603 printf(SPP_FMT "%s illegal %s in state %s\n", 1604 SPP_ARGS(ifp), cp->name, 1605 sppp_cp_type_name(h->type), 1606 sppp_state_name(sp->state[cp->protoidx])); 1607 ++ifp->if_ierrors; 1608 } 1609 break; 1610 case CODE_REJ: 1611 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1612 log(LOG_INFO, 1613 SPP_FMT "%s: ignoring RXJ (%s) for code ?, " 1614 "danger will robinson\n", 1615 SPP_ARGS(ifp), cp->name, 1616 sppp_cp_type_name(h->type)); 1617 switch (sp->state[cp->protoidx]) { 1618 case STATE_CLOSED: 1619 case STATE_STOPPED: 1620 case STATE_REQ_SENT: 1621 case STATE_ACK_SENT: 1622 case STATE_CLOSING: 1623 case STATE_STOPPING: 1624 case STATE_OPENED: 1625 break; 1626 case STATE_ACK_RCVD: 1627 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1628 break; 1629 default: 1630 printf(SPP_FMT "%s illegal %s in state %s\n", 1631 SPP_ARGS(ifp), cp->name, 1632 sppp_cp_type_name(h->type), 1633 sppp_state_name(sp->state[cp->protoidx])); 1634 ++ifp->if_ierrors; 1635 } 1636 break; 1637 case PROTO_REJ: 1638 { 1639 int catastrophic; 1640 const struct cp *upper; 1641 int i; 1642 u_int16_t proto; 1643 1644 catastrophic = 0; 1645 upper = NULL; 1646 proto = p[0] << 8 | p[1]; 1647 for (i = 0; i < IDX_COUNT; i++) { 1648 if (cps[i]->proto == proto) { 1649 upper = cps[i]; 1650 break; 1651 } 1652 } 1653 if (upper == NULL) 1654 catastrophic++; 1655 1656 if (debug) 1657 log(LOG_INFO, 1658 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1659 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+', 1660 sppp_cp_type_name(h->type), proto, 1661 upper ? upper->name : "unknown", 1662 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1663 1664 /* 1665 * if we got RXJ+ against conf-req, the peer does not implement 1666 * this particular protocol type. terminate the protocol. 1667 */ 1668 if (upper && !catastrophic) { 1669 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1670 upper->Close(sp); 1671 break; 1672 } 1673 } 1674 1675 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1676 switch (sp->state[cp->protoidx]) { 1677 case STATE_CLOSED: 1678 case STATE_STOPPED: 1679 case STATE_REQ_SENT: 1680 case STATE_ACK_SENT: 1681 case STATE_CLOSING: 1682 case STATE_STOPPING: 1683 case STATE_OPENED: 1684 break; 1685 case STATE_ACK_RCVD: 1686 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1687 break; 1688 default: 1689 printf(SPP_FMT "%s illegal %s in state %s\n", 1690 SPP_ARGS(ifp), cp->name, 1691 sppp_cp_type_name(h->type), 1692 sppp_state_name(sp->state[cp->protoidx])); 1693 ++ifp->if_ierrors; 1694 } 1695 break; 1696 } 1697 case DISC_REQ: 1698 if (cp->proto != PPP_LCP) 1699 goto illegal; 1700 /* Discard the packet. */ 1701 break; 1702 case ECHO_REQ: 1703 if (cp->proto != PPP_LCP) 1704 goto illegal; 1705 if (sp->state[cp->protoidx] != STATE_OPENED) { 1706 if (debug) 1707 addlog(SPP_FMT "lcp echo req but lcp closed\n", 1708 SPP_ARGS(ifp)); 1709 ++ifp->if_ierrors; 1710 break; 1711 } 1712 if (len < 8) { 1713 if (debug) 1714 addlog(SPP_FMT "invalid lcp echo request " 1715 "packet length: %d bytes\n", 1716 SPP_ARGS(ifp), len); 1717 break; 1718 } 1719 memcpy(&u32, h + 1, sizeof u32); 1720 if (ntohl(u32) == sp->lcp.magic) { 1721 /* Line loopback mode detected. */ 1722 printf(SPP_FMT "loopback\n", SPP_ARGS(ifp)); 1723 if_down (ifp); 1724 IF_PURGE (&sp->pp_cpq); 1725 1726 /* Shut down the PPP link. */ 1727 /* XXX */ 1728 lcp.Down(sp); 1729 lcp.Up(sp); 1730 break; 1731 } 1732 u32 = htonl(sp->lcp.magic); 1733 memcpy(h + 1, &u32, sizeof u32); 1734 if (debug) 1735 addlog(SPP_FMT "got lcp echo req, sending echo rep\n", 1736 SPP_ARGS(ifp)); 1737 sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1); 1738 break; 1739 case ECHO_REPLY: 1740 if (cp->proto != PPP_LCP) 1741 goto illegal; 1742 if (h->ident != sp->lcp.echoid) { 1743 ++ifp->if_ierrors; 1744 break; 1745 } 1746 if (len < 8) { 1747 if (debug) 1748 addlog(SPP_FMT "lcp invalid echo reply " 1749 "packet length: %d bytes\n", 1750 SPP_ARGS(ifp), len); 1751 break; 1752 } 1753 if (debug) 1754 addlog(SPP_FMT "lcp got echo rep\n", 1755 SPP_ARGS(ifp)); 1756 memcpy(&u32, h + 1, sizeof u32); 1757 if (ntohl(u32) != sp->lcp.magic) 1758 sp->pp_alivecnt = 0; 1759 break; 1760 default: 1761 /* Unknown packet type -- send Code-Reject packet. */ 1762 illegal: 1763 if (debug) 1764 addlog(SPP_FMT "%s send code-rej for 0x%x\n", 1765 SPP_ARGS(ifp), cp->name, h->type); 1766 sppp_cp_send(sp, cp->proto, CODE_REJ, 1767 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 1768 ++ifp->if_ierrors; 1769 } 1770 } 1771 1772 1773 /* 1774 * The generic part of all Up/Down/Open/Close/TO event handlers. 1775 * Basically, the state transition handling in the automaton. 1776 */ 1777 static void 1778 sppp_up_event(const struct cp *cp, struct sppp *sp) 1779 { 1780 STDDCL; 1781 1782 if (debug) 1783 log(LOG_DEBUG, SPP_FMT "%s up(%s)\n", 1784 SPP_ARGS(ifp), cp->name, 1785 sppp_state_name(sp->state[cp->protoidx])); 1786 1787 switch (sp->state[cp->protoidx]) { 1788 case STATE_INITIAL: 1789 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1790 break; 1791 case STATE_STARTING: 1792 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1793 (cp->scr)(sp); 1794 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1795 break; 1796 default: 1797 printf(SPP_FMT "%s illegal up in state %s\n", 1798 SPP_ARGS(ifp), cp->name, 1799 sppp_state_name(sp->state[cp->protoidx])); 1800 } 1801 } 1802 1803 static void 1804 sppp_down_event(const struct cp *cp, struct sppp *sp) 1805 { 1806 STDDCL; 1807 1808 if (debug) 1809 log(LOG_DEBUG, SPP_FMT "%s down(%s)\n", 1810 SPP_ARGS(ifp), cp->name, 1811 sppp_state_name(sp->state[cp->protoidx])); 1812 1813 switch (sp->state[cp->protoidx]) { 1814 case STATE_CLOSED: 1815 case STATE_CLOSING: 1816 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1817 break; 1818 case STATE_STOPPED: 1819 (cp->tls)(sp); 1820 /* fall through */ 1821 case STATE_STOPPING: 1822 case STATE_REQ_SENT: 1823 case STATE_ACK_RCVD: 1824 case STATE_ACK_SENT: 1825 sppp_cp_change_state(cp, sp, STATE_STARTING); 1826 break; 1827 case STATE_OPENED: 1828 (cp->tld)(sp); 1829 sppp_cp_change_state(cp, sp, STATE_STARTING); 1830 break; 1831 default: 1832 printf(SPP_FMT "%s illegal down in state %s\n", 1833 SPP_ARGS(ifp), cp->name, 1834 sppp_state_name(sp->state[cp->protoidx])); 1835 } 1836 } 1837 1838 1839 static void 1840 sppp_open_event(const struct cp *cp, struct sppp *sp) 1841 { 1842 STDDCL; 1843 1844 if (debug) 1845 log(LOG_DEBUG, SPP_FMT "%s open(%s)\n", 1846 SPP_ARGS(ifp), cp->name, 1847 sppp_state_name(sp->state[cp->protoidx])); 1848 1849 switch (sp->state[cp->protoidx]) { 1850 case STATE_INITIAL: 1851 (cp->tls)(sp); 1852 sppp_cp_change_state(cp, sp, STATE_STARTING); 1853 break; 1854 case STATE_STARTING: 1855 break; 1856 case STATE_CLOSED: 1857 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1858 (cp->scr)(sp); 1859 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1860 break; 1861 case STATE_STOPPED: 1862 case STATE_STOPPING: 1863 case STATE_REQ_SENT: 1864 case STATE_ACK_RCVD: 1865 case STATE_ACK_SENT: 1866 case STATE_OPENED: 1867 break; 1868 case STATE_CLOSING: 1869 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1870 break; 1871 } 1872 } 1873 1874 1875 static void 1876 sppp_close_event(const struct cp *cp, struct sppp *sp) 1877 { 1878 STDDCL; 1879 1880 if (debug) 1881 log(LOG_DEBUG, SPP_FMT "%s close(%s)\n", 1882 SPP_ARGS(ifp), cp->name, 1883 sppp_state_name(sp->state[cp->protoidx])); 1884 1885 switch (sp->state[cp->protoidx]) { 1886 case STATE_INITIAL: 1887 case STATE_CLOSED: 1888 case STATE_CLOSING: 1889 break; 1890 case STATE_STARTING: 1891 (cp->tlf)(sp); 1892 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1893 break; 1894 case STATE_STOPPED: 1895 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1896 break; 1897 case STATE_STOPPING: 1898 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1899 break; 1900 case STATE_OPENED: 1901 (cp->tld)(sp); 1902 /* fall through */ 1903 case STATE_REQ_SENT: 1904 case STATE_ACK_RCVD: 1905 case STATE_ACK_SENT: 1906 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 1907 sppp_cp_send(sp, cp->proto, TERM_REQ, 1908 ++sp->pp_seq[cp->protoidx], 0, 0); 1909 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1910 break; 1911 } 1912 } 1913 1914 static void 1915 sppp_to_event(const struct cp *cp, struct sppp *sp) 1916 { 1917 STDDCL; 1918 int s; 1919 1920 s = splnet(); 1921 if (debug) 1922 log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n", 1923 SPP_ARGS(ifp), cp->name, 1924 sppp_state_name(sp->state[cp->protoidx]), 1925 sp->rst_counter[cp->protoidx]); 1926 1927 if (--sp->rst_counter[cp->protoidx] < 0) 1928 /* TO- event */ 1929 switch (sp->state[cp->protoidx]) { 1930 case STATE_CLOSING: 1931 (cp->tlf)(sp); 1932 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1933 sppp_lcp_check_and_close(sp); 1934 break; 1935 case STATE_STOPPING: 1936 (cp->tlf)(sp); 1937 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1938 sppp_lcp_check_and_close(sp); 1939 break; 1940 case STATE_REQ_SENT: 1941 case STATE_ACK_RCVD: 1942 case STATE_ACK_SENT: 1943 (cp->tlf)(sp); 1944 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1945 sppp_lcp_check_and_close(sp); 1946 break; 1947 } 1948 else 1949 /* TO+ event */ 1950 switch (sp->state[cp->protoidx]) { 1951 case STATE_CLOSING: 1952 case STATE_STOPPING: 1953 sppp_cp_send(sp, cp->proto, TERM_REQ, 1954 ++sp->pp_seq[cp->protoidx], 0, 0); 1955 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1956 cp->TO, sp); 1957 break; 1958 case STATE_REQ_SENT: 1959 case STATE_ACK_RCVD: 1960 (cp->scr)(sp); 1961 /* sppp_cp_change_state() will restart the timer */ 1962 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1963 break; 1964 case STATE_ACK_SENT: 1965 (cp->scr)(sp); 1966 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1967 cp->TO, sp); 1968 break; 1969 } 1970 1971 splx(s); 1972 } 1973 1974 /* 1975 * Change the state of a control protocol in the state automaton. 1976 * Takes care of starting/stopping the restart timer. 1977 */ 1978 void 1979 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 1980 { 1981 sp->state[cp->protoidx] = newstate; 1982 callout_stop(&sp->ch[cp->protoidx]); 1983 switch (newstate) { 1984 case STATE_INITIAL: 1985 case STATE_STARTING: 1986 case STATE_CLOSED: 1987 case STATE_STOPPED: 1988 case STATE_OPENED: 1989 break; 1990 case STATE_CLOSING: 1991 case STATE_STOPPING: 1992 case STATE_REQ_SENT: 1993 case STATE_ACK_RCVD: 1994 case STATE_ACK_SENT: 1995 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1996 cp->TO, sp); 1997 break; 1998 } 1999 } 2000 2001 /* 2002 *--------------------------------------------------------------------------* 2003 * * 2004 * The LCP implementation. * 2005 * * 2006 *--------------------------------------------------------------------------* 2007 */ 2008 static void 2009 sppp_lcp_init(struct sppp *sp) 2010 { 2011 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 2012 sp->lcp.magic = 0; 2013 sp->state[IDX_LCP] = STATE_INITIAL; 2014 sp->fail_counter[IDX_LCP] = 0; 2015 sp->pp_seq[IDX_LCP] = 0; 2016 sp->pp_rseq[IDX_LCP] = 0; 2017 sp->lcp.protos = 0; 2018 sp->lcp.mru = sp->lcp.their_mru = PP_MTU; 2019 2020 /* 2021 * Initialize counters and timeout values. Note that we don't 2022 * use the 3 seconds suggested in RFC 1661 since we are likely 2023 * running on a fast link. XXX We should probably implement 2024 * the exponential backoff option. Note that these values are 2025 * relevant for all control protocols, not just LCP only. 2026 */ 2027 sp->lcp.timeout = 1 * hz; 2028 sp->lcp.max_terminate = 2; 2029 sp->lcp.max_configure = 10; 2030 sp->lcp.max_failure = 10; 2031 callout_init(&sp->ch[IDX_LCP]); 2032 } 2033 2034 static void 2035 sppp_lcp_up(struct sppp *sp) 2036 { 2037 STDDCL; 2038 2039 /* Initialize activity timestamp: opening a connection is an activity */ 2040 sp->pp_last_activity = mono_time.tv_sec; 2041 2042 /* 2043 * If this interface is passive or dial-on-demand, and we are 2044 * still in Initial state, it means we've got an incoming 2045 * call. Activate the interface. 2046 */ 2047 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2048 if (debug) 2049 log(LOG_DEBUG, 2050 SPP_FMT "Up event", SPP_ARGS(ifp)); 2051 ifp->if_flags |= IFF_RUNNING; 2052 if (sp->state[IDX_LCP] == STATE_INITIAL) { 2053 if (debug) 2054 addlog("(incoming call)\n"); 2055 sp->pp_flags |= PP_CALLIN; 2056 lcp.Open(sp); 2057 } else if (debug) 2058 addlog("\n"); 2059 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 && 2060 (sp->state[IDX_LCP] == STATE_INITIAL)) { 2061 ifp->if_flags |= IFF_RUNNING; 2062 lcp.Open(sp); 2063 } 2064 2065 sppp_up_event(&lcp, sp); 2066 } 2067 2068 static void 2069 sppp_lcp_down(struct sppp *sp) 2070 { 2071 STDDCL; 2072 2073 sppp_down_event(&lcp, sp); 2074 2075 /* 2076 * If this is neither a dial-on-demand nor a passive 2077 * interface, simulate an ``ifconfig down'' action, so the 2078 * administrator can force a redial by another ``ifconfig 2079 * up''. XXX For leased line operation, should we immediately 2080 * try to reopen the connection here? 2081 */ 2082 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2083 if (debug) 2084 log(LOG_INFO, 2085 SPP_FMT "Down event (carrier loss), taking interface down.\n", 2086 SPP_ARGS(ifp)); 2087 if_down(ifp); 2088 } else { 2089 if (debug) 2090 log(LOG_DEBUG, 2091 SPP_FMT "Down event (carrier loss)\n", 2092 SPP_ARGS(ifp)); 2093 } 2094 sp->pp_flags &= ~PP_CALLIN; 2095 if (sp->state[IDX_LCP] != STATE_INITIAL) 2096 lcp.Close(sp); 2097 ifp->if_flags &= ~IFF_RUNNING; 2098 } 2099 2100 static void 2101 sppp_lcp_open(struct sppp *sp) 2102 { 2103 /* 2104 * If we are authenticator, negotiate LCP_AUTH 2105 */ 2106 if (sp->hisauth.proto != 0) 2107 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2108 else 2109 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2110 sp->pp_flags &= ~PP_NEEDAUTH; 2111 sppp_open_event(&lcp, sp); 2112 } 2113 2114 static void 2115 sppp_lcp_close(struct sppp *sp) 2116 { 2117 sppp_close_event(&lcp, sp); 2118 } 2119 2120 static void 2121 sppp_lcp_TO(void *cookie) 2122 { 2123 sppp_to_event(&lcp, (struct sppp *)cookie); 2124 } 2125 2126 /* 2127 * Analyze a configure request. Return true if it was agreeable, and 2128 * caused action sca, false if it has been rejected or nak'ed, and 2129 * caused action scn. (The return value is used to make the state 2130 * transition decision in the state automaton.) 2131 */ 2132 static int 2133 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2134 { 2135 STDDCL; 2136 u_char *buf, *r, *p; 2137 int origlen, rlen; 2138 u_int32_t nmagic; 2139 u_short authproto; 2140 2141 len -= 4; 2142 origlen = len; 2143 buf = r = malloc (len, M_TEMP, M_NOWAIT); 2144 if (! buf) 2145 return (0); 2146 2147 if (debug) 2148 log(LOG_DEBUG, SPP_FMT "lcp parse opts:", 2149 SPP_ARGS(ifp)); 2150 2151 /* pass 1: check for things that need to be rejected */ 2152 p = (void*) (h+1); 2153 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2154 if (debug) 2155 addlog(" %s", sppp_lcp_opt_name(*p)); 2156 switch (*p) { 2157 case LCP_OPT_MAGIC: 2158 /* Magic number. */ 2159 /* fall through, both are same length */ 2160 case LCP_OPT_ASYNC_MAP: 2161 /* Async control character map. */ 2162 if (len >= 6 || p[1] == 6) 2163 continue; 2164 if (debug) 2165 addlog(" [invalid]"); 2166 break; 2167 case LCP_OPT_MRU: 2168 /* Maximum receive unit. */ 2169 if (len >= 4 && p[1] == 4) 2170 continue; 2171 if (debug) 2172 addlog(" [invalid]"); 2173 break; 2174 case LCP_OPT_AUTH_PROTO: 2175 if (len < 4) { 2176 if (debug) 2177 addlog(" [invalid]"); 2178 break; 2179 } 2180 authproto = (p[2] << 8) + p[3]; 2181 if (authproto == PPP_CHAP && p[1] != 5) { 2182 if (debug) 2183 addlog(" [invalid chap len]"); 2184 break; 2185 } 2186 if (sp->myauth.proto == 0) { 2187 /* we are not configured to do auth */ 2188 if (debug) 2189 addlog(" [not configured]"); 2190 break; 2191 } 2192 /* 2193 * Remote want us to authenticate, remember this, 2194 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2195 * up. 2196 */ 2197 sp->pp_flags |= PP_NEEDAUTH; 2198 continue; 2199 default: 2200 /* Others not supported. */ 2201 if (debug) 2202 addlog(" [rej]"); 2203 break; 2204 } 2205 /* Add the option to rejected list. */ 2206 bcopy (p, r, p[1]); 2207 r += p[1]; 2208 rlen += p[1]; 2209 } 2210 if (rlen) { 2211 if (debug) 2212 addlog(" send conf-rej\n"); 2213 sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2214 goto end; 2215 } else if (debug) 2216 addlog("\n"); 2217 2218 /* 2219 * pass 2: check for option values that are unacceptable and 2220 * thus require to be nak'ed. 2221 */ 2222 if (debug) 2223 log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ", 2224 SPP_ARGS(ifp)); 2225 2226 p = (void*) (h+1); 2227 len = origlen; 2228 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2229 if (debug) 2230 addlog(" %s", sppp_lcp_opt_name(*p)); 2231 switch (*p) { 2232 case LCP_OPT_MAGIC: 2233 /* Magic number -- extract. */ 2234 nmagic = (u_int32_t)p[2] << 24 | 2235 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2236 if (nmagic != sp->lcp.magic) { 2237 if (debug) 2238 addlog(" 0x%x", nmagic); 2239 continue; 2240 } 2241 /* 2242 * Local and remote magics equal -- loopback? 2243 */ 2244 if (sp->pp_loopcnt >= MAXALIVECNT*5) { 2245 printf (SPP_FMT "loopback\n", 2246 SPP_ARGS(ifp)); 2247 sp->pp_loopcnt = 0; 2248 if (ifp->if_flags & IFF_UP) { 2249 if_down(ifp); 2250 IF_PURGE(&sp->pp_cpq); 2251 /* XXX ? */ 2252 lcp.Down(sp); 2253 lcp.Up(sp); 2254 } 2255 } else if (debug) 2256 addlog(" [glitch]"); 2257 ++sp->pp_loopcnt; 2258 /* 2259 * We negate our magic here, and NAK it. If 2260 * we see it later in an NAK packet, we 2261 * suggest a new one. 2262 */ 2263 nmagic = ~sp->lcp.magic; 2264 /* Gonna NAK it. */ 2265 p[2] = nmagic >> 24; 2266 p[3] = nmagic >> 16; 2267 p[4] = nmagic >> 8; 2268 p[5] = nmagic; 2269 break; 2270 2271 case LCP_OPT_ASYNC_MAP: 2272 /* 2273 * Async control character map -- just ignore it. 2274 * 2275 * Quote from RFC 1662, chapter 6: 2276 * To enable this functionality, synchronous PPP 2277 * implementations MUST always respond to the 2278 * Async-Control-Character-Map Configuration 2279 * Option with the LCP Configure-Ack. However, 2280 * acceptance of the Configuration Option does 2281 * not imply that the synchronous implementation 2282 * will do any ACCM mapping. Instead, all such 2283 * octet mapping will be performed by the 2284 * asynchronous-to-synchronous converter. 2285 */ 2286 continue; 2287 2288 case LCP_OPT_MRU: 2289 /* 2290 * Maximum receive unit. Always agreeable, 2291 * but ignored by now. 2292 */ 2293 sp->lcp.their_mru = p[2] * 256 + p[3]; 2294 if (debug) 2295 addlog(" %ld", sp->lcp.their_mru); 2296 continue; 2297 2298 case LCP_OPT_AUTH_PROTO: 2299 authproto = (p[2] << 8) + p[3]; 2300 if (sp->myauth.proto != authproto) { 2301 /* not agreed, nak */ 2302 if (debug) 2303 addlog(" [mine %s != his %s]", 2304 sppp_proto_name(sp->hisauth.proto), 2305 sppp_proto_name(authproto)); 2306 p[2] = sp->myauth.proto >> 8; 2307 p[3] = sp->myauth.proto; 2308 break; 2309 } 2310 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2311 if (debug) 2312 addlog(" [chap not MD5]"); 2313 p[4] = CHAP_MD5; 2314 break; 2315 } 2316 continue; 2317 } 2318 /* Add the option to nak'ed list. */ 2319 bcopy (p, r, p[1]); 2320 r += p[1]; 2321 rlen += p[1]; 2322 } 2323 if (rlen) { 2324 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2325 if (debug) 2326 addlog(" max_failure (%d) exceeded, " 2327 "send conf-rej\n", 2328 sp->lcp.max_failure); 2329 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2330 } else { 2331 if (debug) 2332 addlog(" send conf-nak\n"); 2333 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2334 } 2335 goto end; 2336 } else { 2337 if (debug) 2338 addlog(" send conf-ack\n"); 2339 sp->fail_counter[IDX_LCP] = 0; 2340 sp->pp_loopcnt = 0; 2341 sppp_cp_send (sp, PPP_LCP, CONF_ACK, 2342 h->ident, origlen, h+1); 2343 } 2344 2345 end: 2346 free (buf, M_TEMP); 2347 return (rlen == 0); 2348 } 2349 2350 /* 2351 * Analyze the LCP Configure-Reject option list, and adjust our 2352 * negotiation. 2353 */ 2354 static void 2355 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2356 { 2357 STDDCL; 2358 u_char *buf, *p; 2359 2360 len -= 4; 2361 buf = malloc (len, M_TEMP, M_NOWAIT); 2362 if (!buf) 2363 return; 2364 2365 if (debug) 2366 log(LOG_DEBUG, SPP_FMT "lcp rej opts:", 2367 SPP_ARGS(ifp)); 2368 2369 p = (void*) (h+1); 2370 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2371 if (debug) 2372 addlog(" %s", sppp_lcp_opt_name(*p)); 2373 switch (*p) { 2374 case LCP_OPT_MAGIC: 2375 /* Magic number -- can't use it, use 0 */ 2376 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2377 sp->lcp.magic = 0; 2378 break; 2379 case LCP_OPT_MRU: 2380 /* 2381 * Should not be rejected anyway, since we only 2382 * negotiate a MRU if explicitly requested by 2383 * peer. 2384 */ 2385 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2386 break; 2387 case LCP_OPT_AUTH_PROTO: 2388 /* 2389 * Peer doesn't want to authenticate himself, 2390 * deny unless this is a dialout call, and 2391 * SPPP_AUTHFLAG_NOCALLOUT is set. 2392 */ 2393 if ((sp->pp_flags & PP_CALLIN) == 0 && 2394 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2395 if (debug) 2396 addlog(" [don't insist on auth " 2397 "for callout]"); 2398 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2399 break; 2400 } 2401 if (debug) 2402 addlog("[access denied]\n"); 2403 lcp.Close(sp); 2404 break; 2405 } 2406 } 2407 if (debug) 2408 addlog("\n"); 2409 free (buf, M_TEMP); 2410 return; 2411 } 2412 2413 /* 2414 * Analyze the LCP Configure-NAK option list, and adjust our 2415 * negotiation. 2416 */ 2417 static void 2418 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2419 { 2420 STDDCL; 2421 u_char *buf, *p; 2422 u_int32_t magic; 2423 2424 len -= 4; 2425 buf = malloc (len, M_TEMP, M_NOWAIT); 2426 if (!buf) 2427 return; 2428 2429 if (debug) 2430 log(LOG_DEBUG, SPP_FMT "lcp nak opts:", 2431 SPP_ARGS(ifp)); 2432 2433 p = (void*) (h+1); 2434 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2435 if (debug) 2436 addlog(" %s", sppp_lcp_opt_name(*p)); 2437 switch (*p) { 2438 case LCP_OPT_MAGIC: 2439 /* Magic number -- renegotiate */ 2440 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2441 len >= 6 && p[1] == 6) { 2442 magic = (u_int32_t)p[2] << 24 | 2443 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2444 /* 2445 * If the remote magic is our negated one, 2446 * this looks like a loopback problem. 2447 * Suggest a new magic to make sure. 2448 */ 2449 if (magic == ~sp->lcp.magic) { 2450 if (debug) 2451 addlog(" magic glitch"); 2452 sp->lcp.magic = random(); 2453 } else { 2454 sp->lcp.magic = magic; 2455 if (debug) 2456 addlog(" %d", magic); 2457 } 2458 } 2459 break; 2460 case LCP_OPT_MRU: 2461 /* 2462 * Peer wants to advise us to negotiate an MRU. 2463 * Agree on it if it's reasonable, or use 2464 * default otherwise. 2465 */ 2466 if (len >= 4 && p[1] == 4) { 2467 u_int mru = p[2] * 256 + p[3]; 2468 if (debug) 2469 addlog(" %d", mru); 2470 if (mru < PP_MTU || mru > PP_MAX_MRU) 2471 mru = PP_MTU; 2472 sp->lcp.mru = mru; 2473 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2474 } 2475 break; 2476 case LCP_OPT_AUTH_PROTO: 2477 /* 2478 * Peer doesn't like our authentication method, 2479 * deny. 2480 */ 2481 if (debug) 2482 addlog("[access denied]\n"); 2483 lcp.Close(sp); 2484 break; 2485 } 2486 } 2487 if (debug) 2488 addlog("\n"); 2489 free (buf, M_TEMP); 2490 return; 2491 } 2492 2493 static void 2494 sppp_lcp_tlu(struct sppp *sp) 2495 { 2496 STDDCL; 2497 int i; 2498 u_int32_t mask; 2499 2500 /* XXX ? */ 2501 if (! (ifp->if_flags & IFF_UP) && 2502 (ifp->if_flags & IFF_RUNNING)) { 2503 /* Coming out of loopback mode. */ 2504 if_up(ifp); 2505 } 2506 2507 for (i = 0; i < IDX_COUNT; i++) 2508 if ((cps[i])->flags & CP_QUAL) 2509 (cps[i])->Open(sp); 2510 2511 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2512 (sp->pp_flags & PP_NEEDAUTH) != 0) 2513 sp->pp_phase = SPPP_PHASE_AUTHENTICATE; 2514 else 2515 sp->pp_phase = SPPP_PHASE_NETWORK; 2516 2517 if(debug) 2518 { 2519 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2520 sppp_phase_name(sp->pp_phase)); 2521 } 2522 2523 /* 2524 * Open all authentication protocols. This is even required 2525 * if we already proceeded to network phase, since it might be 2526 * that remote wants us to authenticate, so we might have to 2527 * send a PAP request. Undesired authentication protocols 2528 * don't do anything when they get an Open event. 2529 */ 2530 for (i = 0; i < IDX_COUNT; i++) 2531 if ((cps[i])->flags & CP_AUTH) 2532 (cps[i])->Open(sp); 2533 2534 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2535 /* Notify all NCPs. */ 2536 for (i = 0; i < IDX_COUNT; i++) 2537 if ((cps[i])->flags & CP_NCP) 2538 (cps[i])->Open(sp); 2539 } 2540 2541 /* Send Up events to all started protos. */ 2542 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2543 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) 2544 (cps[i])->Up(sp); 2545 2546 /* notify low-level driver of state change */ 2547 if (sp->pp_chg) 2548 sp->pp_chg(sp, (int)sp->pp_phase); 2549 2550 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2551 /* if no NCP is starting, close down */ 2552 sppp_lcp_check_and_close(sp); 2553 } 2554 2555 static void 2556 sppp_lcp_tld(struct sppp *sp) 2557 { 2558 STDDCL; 2559 int i; 2560 u_int32_t mask; 2561 2562 sp->pp_phase = SPPP_PHASE_TERMINATE; 2563 2564 if(debug) 2565 { 2566 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2567 sppp_phase_name(sp->pp_phase)); 2568 } 2569 2570 /* 2571 * Take upper layers down. We send the Down event first and 2572 * the Close second to prevent the upper layers from sending 2573 * ``a flurry of terminate-request packets'', as the RFC 2574 * describes it. 2575 */ 2576 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2577 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2578 (cps[i])->Down(sp); 2579 (cps[i])->Close(sp); 2580 } 2581 } 2582 2583 static void 2584 sppp_lcp_tls(struct sppp *sp) 2585 { 2586 STDDCL; 2587 2588 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2589 printf("%s: authentication failed %d times, not retrying again\n", 2590 sp->pp_if.if_xname, sp->pp_auth_failures); 2591 if_down(&sp->pp_if); 2592 return; 2593 } 2594 2595 sp->pp_phase = SPPP_PHASE_ESTABLISH; 2596 2597 if(debug) 2598 { 2599 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2600 sppp_phase_name(sp->pp_phase)); 2601 } 2602 2603 /* Notify lower layer if desired. */ 2604 if (sp->pp_tls) 2605 (sp->pp_tls)(sp); 2606 } 2607 2608 static void 2609 sppp_lcp_tlf(struct sppp *sp) 2610 { 2611 STDDCL; 2612 2613 sp->pp_phase = SPPP_PHASE_DEAD; 2614 2615 if(debug) 2616 { 2617 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2618 sppp_phase_name(sp->pp_phase)); 2619 } 2620 2621 /* Notify lower layer if desired. */ 2622 if (sp->pp_tlf) 2623 (sp->pp_tlf)(sp); 2624 } 2625 2626 static void 2627 sppp_lcp_scr(struct sppp *sp) 2628 { 2629 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2630 int i = 0; 2631 u_short authproto; 2632 2633 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2634 if (! sp->lcp.magic) 2635 sp->lcp.magic = random(); 2636 opt[i++] = LCP_OPT_MAGIC; 2637 opt[i++] = 6; 2638 opt[i++] = sp->lcp.magic >> 24; 2639 opt[i++] = sp->lcp.magic >> 16; 2640 opt[i++] = sp->lcp.magic >> 8; 2641 opt[i++] = sp->lcp.magic; 2642 } 2643 2644 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2645 opt[i++] = LCP_OPT_MRU; 2646 opt[i++] = 4; 2647 opt[i++] = sp->lcp.mru >> 8; 2648 opt[i++] = sp->lcp.mru; 2649 } 2650 2651 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2652 authproto = sp->hisauth.proto; 2653 opt[i++] = LCP_OPT_AUTH_PROTO; 2654 opt[i++] = authproto == PPP_CHAP? 5: 4; 2655 opt[i++] = authproto >> 8; 2656 opt[i++] = authproto; 2657 if (authproto == PPP_CHAP) 2658 opt[i++] = CHAP_MD5; 2659 } 2660 2661 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2662 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2663 } 2664 2665 /* 2666 * Check the open NCPs, return true if at least one NCP is open. 2667 */ 2668 static int 2669 sppp_ncp_check(struct sppp *sp) 2670 { 2671 int i, mask; 2672 2673 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2674 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2675 return 1; 2676 return 0; 2677 } 2678 2679 /* 2680 * Re-check the open NCPs and see if we should terminate the link. 2681 * Called by the NCPs during their tlf action handling. 2682 */ 2683 static void 2684 sppp_lcp_check_and_close(struct sppp *sp) 2685 { 2686 2687 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2688 /* don't bother, we are already going down */ 2689 return; 2690 2691 if (sppp_ncp_check(sp)) 2692 return; 2693 2694 lcp.Close(sp); 2695 } 2696 2697 2698 /* 2699 *--------------------------------------------------------------------------* 2700 * * 2701 * The IPCP implementation. * 2702 * * 2703 *--------------------------------------------------------------------------* 2704 */ 2705 2706 static void 2707 sppp_ipcp_init(struct sppp *sp) 2708 { 2709 sp->ipcp.opts = 0; 2710 sp->ipcp.flags = 0; 2711 sp->state[IDX_IPCP] = STATE_INITIAL; 2712 sp->fail_counter[IDX_IPCP] = 0; 2713 sp->pp_seq[IDX_IPCP] = 0; 2714 sp->pp_rseq[IDX_IPCP] = 0; 2715 callout_init(&sp->ch[IDX_IPCP]); 2716 } 2717 2718 static void 2719 sppp_ipcp_up(struct sppp *sp) 2720 { 2721 sppp_up_event(&ipcp, sp); 2722 } 2723 2724 static void 2725 sppp_ipcp_down(struct sppp *sp) 2726 { 2727 sppp_down_event(&ipcp, sp); 2728 } 2729 2730 static void 2731 sppp_ipcp_open(struct sppp *sp) 2732 { 2733 STDDCL; 2734 u_int32_t myaddr, hisaddr; 2735 2736 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 2737 sp->ipcp.req_myaddr = 0; 2738 sp->ipcp.req_hisaddr = 0; 2739 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 2740 2741 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 2742 /* 2743 * If we don't have his address, this probably means our 2744 * interface doesn't want to talk IP at all. (This could 2745 * be the case if somebody wants to speak only IPX, for 2746 * example.) Don't open IPCP in this case. 2747 */ 2748 if (hisaddr == 0L) { 2749 /* XXX this message should go away */ 2750 if (debug) 2751 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n", 2752 SPP_ARGS(ifp)); 2753 return; 2754 } 2755 2756 if (myaddr == 0) { 2757 /* 2758 * I don't have an assigned address, so i need to 2759 * negotiate my address. 2760 */ 2761 sp->ipcp.flags |= IPCP_MYADDR_DYN; 2762 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 2763 } 2764 if (hisaddr == 1) { 2765 /* 2766 * XXX - remove this hack! 2767 * remote has no valid adress, we need to get one assigned. 2768 */ 2769 sp->ipcp.flags |= IPCP_HISADDR_DYN; 2770 } 2771 sppp_open_event(&ipcp, sp); 2772 } 2773 2774 static void 2775 sppp_ipcp_close(struct sppp *sp) 2776 { 2777 STDDCL; 2778 2779 sppp_close_event(&ipcp, sp); 2780 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 2781 /* 2782 * Some address was dynamic, clear it again. 2783 */ 2784 sppp_clear_ip_addrs(sp); 2785 2786 if (sp->pp_saved_mtu > 0) { 2787 ifp->if_mtu = sp->pp_saved_mtu; 2788 sp->pp_saved_mtu = 0; 2789 if (debug) 2790 log(LOG_DEBUG, 2791 SPP_FMT "resetting MTU to %" PRIu64 " bytes\n", 2792 SPP_ARGS(ifp), ifp->if_mtu); 2793 } 2794 } 2795 2796 static void 2797 sppp_ipcp_TO(void *cookie) 2798 { 2799 sppp_to_event(&ipcp, (struct sppp *)cookie); 2800 } 2801 2802 /* 2803 * Analyze a configure request. Return true if it was agreeable, and 2804 * caused action sca, false if it has been rejected or nak'ed, and 2805 * caused action scn. (The return value is used to make the state 2806 * transition decision in the state automaton.) 2807 */ 2808 static int 2809 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2810 { 2811 u_char *buf, *r, *p; 2812 struct ifnet *ifp = &sp->pp_if; 2813 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 2814 u_int32_t hisaddr, desiredaddr; 2815 2816 len -= 4; 2817 origlen = len; 2818 /* 2819 * Make sure to allocate a buf that can at least hold a 2820 * conf-nak with an `address' option. We might need it below. 2821 */ 2822 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 2823 if (! buf) 2824 return (0); 2825 2826 /* pass 1: see if we can recognize them */ 2827 if (debug) 2828 log(LOG_DEBUG, SPP_FMT "ipcp parse opts:", 2829 SPP_ARGS(ifp)); 2830 p = (void*) (h+1); 2831 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2832 if (debug) 2833 addlog(" %s", sppp_ipcp_opt_name(*p)); 2834 switch (*p) { 2835 #ifdef notyet 2836 case IPCP_OPT_COMPRESSION: 2837 if (len >= 6 && p[1] >= 6) { 2838 /* correctly formed compress option */ 2839 continue; 2840 } 2841 if (debug) 2842 addlog(" [invalid]"); 2843 break; 2844 #endif 2845 case IPCP_OPT_ADDRESS: 2846 if (len >= 6 && p[1] == 6) { 2847 /* correctly formed address option */ 2848 continue; 2849 } 2850 if (debug) 2851 addlog(" [invalid]"); 2852 break; 2853 default: 2854 /* Others not supported. */ 2855 if (debug) 2856 addlog(" [rej]"); 2857 break; 2858 } 2859 /* Add the option to rejected list. */ 2860 bcopy (p, r, p[1]); 2861 r += p[1]; 2862 rlen += p[1]; 2863 } 2864 if (rlen) { 2865 if (debug) 2866 addlog(" send conf-rej\n"); 2867 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 2868 goto end; 2869 } else if (debug) 2870 addlog("\n"); 2871 2872 /* pass 2: parse option values */ 2873 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 2874 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 2875 else 2876 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 2877 if (debug) 2878 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ", 2879 SPP_ARGS(ifp)); 2880 p = (void*) (h+1); 2881 len = origlen; 2882 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2883 if (debug) 2884 addlog(" %s", sppp_ipcp_opt_name(*p)); 2885 switch (*p) { 2886 #ifdef notyet 2887 case IPCP_OPT_COMPRESSION: 2888 continue; 2889 #endif 2890 case IPCP_OPT_ADDRESS: 2891 desiredaddr = p[2] << 24 | p[3] << 16 | 2892 p[4] << 8 | p[5]; 2893 if (desiredaddr == hisaddr || 2894 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 2895 /* 2896 * Peer's address is same as our value, 2897 * this is agreeable. Gonna conf-ack 2898 * it. 2899 */ 2900 if (debug) 2901 addlog(" %s [ack]", 2902 sppp_dotted_quad(hisaddr)); 2903 /* record that we've seen it already */ 2904 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 2905 sp->ipcp.req_hisaddr = desiredaddr; 2906 hisaddr = desiredaddr; 2907 continue; 2908 } 2909 /* 2910 * The address wasn't agreeable. This is either 2911 * he sent us 0.0.0.0, asking to assign him an 2912 * address, or he send us another address not 2913 * matching our value. Either case, we gonna 2914 * conf-nak it with our value. 2915 */ 2916 if (debug) { 2917 if (desiredaddr == 0) 2918 addlog(" [addr requested]"); 2919 else 2920 addlog(" %s [not agreed]", 2921 sppp_dotted_quad(desiredaddr)); 2922 } 2923 2924 p[2] = hisaddr >> 24; 2925 p[3] = hisaddr >> 16; 2926 p[4] = hisaddr >> 8; 2927 p[5] = hisaddr; 2928 break; 2929 } 2930 /* Add the option to nak'ed list. */ 2931 bcopy (p, r, p[1]); 2932 r += p[1]; 2933 rlen += p[1]; 2934 } 2935 2936 /* 2937 * If we are about to conf-ack the request, but haven't seen 2938 * his address so far, gonna conf-nak it instead, with the 2939 * `address' option present and our idea of his address being 2940 * filled in there, to request negotiation of both addresses. 2941 * 2942 * XXX This can result in an endless req - nak loop if peer 2943 * doesn't want to send us his address. Q: What should we do 2944 * about it? XXX A: implement the max-failure counter. 2945 */ 2946 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 2947 buf[0] = IPCP_OPT_ADDRESS; 2948 buf[1] = 6; 2949 buf[2] = hisaddr >> 24; 2950 buf[3] = hisaddr >> 16; 2951 buf[4] = hisaddr >> 8; 2952 buf[5] = hisaddr; 2953 rlen = 6; 2954 if (debug) 2955 addlog(" still need hisaddr"); 2956 } 2957 2958 if (rlen) { 2959 if (debug) 2960 addlog(" send conf-nak\n"); 2961 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 2962 } else { 2963 if (debug) 2964 addlog(" send conf-ack\n"); 2965 sppp_cp_send (sp, PPP_IPCP, CONF_ACK, 2966 h->ident, origlen, h+1); 2967 } 2968 2969 end: 2970 free (buf, M_TEMP); 2971 return (rlen == 0); 2972 } 2973 2974 /* 2975 * Analyze the IPCP Configure-Reject option list, and adjust our 2976 * negotiation. 2977 */ 2978 static void 2979 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2980 { 2981 u_char *buf, *p; 2982 struct ifnet *ifp = &sp->pp_if; 2983 int debug = ifp->if_flags & IFF_DEBUG; 2984 2985 len -= 4; 2986 buf = malloc (len, M_TEMP, M_NOWAIT); 2987 if (!buf) 2988 return; 2989 2990 if (debug) 2991 log(LOG_DEBUG, SPP_FMT "ipcp rej opts:", 2992 SPP_ARGS(ifp)); 2993 2994 p = (void*) (h+1); 2995 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2996 if (debug) 2997 addlog(" %s", sppp_ipcp_opt_name(*p)); 2998 switch (*p) { 2999 case IPCP_OPT_ADDRESS: 3000 /* 3001 * Peer doesn't grok address option. This is 3002 * bad. XXX Should we better give up here? 3003 */ 3004 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 3005 break; 3006 #ifdef notyet 3007 case IPCP_OPT_COMPRESS: 3008 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 3009 break; 3010 #endif 3011 } 3012 } 3013 if (debug) 3014 addlog("\n"); 3015 free (buf, M_TEMP); 3016 return; 3017 } 3018 3019 /* 3020 * Analyze the IPCP Configure-NAK option list, and adjust our 3021 * negotiation. 3022 */ 3023 static void 3024 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3025 { 3026 u_char *p; 3027 struct ifnet *ifp = &sp->pp_if; 3028 int debug = ifp->if_flags & IFF_DEBUG; 3029 u_int32_t wantaddr; 3030 3031 len -= 4; 3032 3033 if (debug) 3034 log(LOG_DEBUG, SPP_FMT "ipcp nak opts:", 3035 SPP_ARGS(ifp)); 3036 3037 p = (void*) (h+1); 3038 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3039 if (debug) 3040 addlog(" %s", sppp_ipcp_opt_name(*p)); 3041 switch (*p) { 3042 case IPCP_OPT_ADDRESS: 3043 /* 3044 * Peer doesn't like our local IP address. See 3045 * if we can do something for him. We'll drop 3046 * him our address then. 3047 */ 3048 if (len >= 6 && p[1] == 6) { 3049 wantaddr = p[2] << 24 | p[3] << 16 | 3050 p[4] << 8 | p[5]; 3051 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3052 if (debug) 3053 addlog(" [wantaddr %s]", 3054 sppp_dotted_quad(wantaddr)); 3055 /* 3056 * When doing dynamic address assignment, 3057 * we accept his offer. Otherwise, we 3058 * ignore it and thus continue to negotiate 3059 * our already existing value. 3060 */ 3061 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3062 if (debug) 3063 addlog(" [agree]"); 3064 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3065 sp->ipcp.req_myaddr = wantaddr; 3066 } 3067 } 3068 break; 3069 3070 case IPCP_OPT_PRIMDNS: 3071 if (len >= 6 && p[1] == 6) { 3072 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3073 p[4] << 8 | p[5]; 3074 } 3075 break; 3076 3077 case IPCP_OPT_SECDNS: 3078 if (len >= 6 && p[1] == 6) { 3079 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3080 p[4] << 8 | p[5]; 3081 } 3082 break; 3083 #ifdef notyet 3084 case IPCP_OPT_COMPRESS: 3085 /* 3086 * Peer wants different compression parameters. 3087 */ 3088 break; 3089 #endif 3090 } 3091 } 3092 if (debug) 3093 addlog("\n"); 3094 return; 3095 } 3096 3097 static void 3098 sppp_ipcp_tlu(struct sppp *sp) 3099 { 3100 /* we are up. Set addresses and notify anyone interested */ 3101 STDDCL; 3102 u_int32_t myaddr, hisaddr; 3103 3104 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3105 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 3106 myaddr = sp->ipcp.req_myaddr; 3107 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 3108 hisaddr = sp->ipcp.req_hisaddr; 3109 sppp_set_ip_addrs(sp, myaddr, hisaddr); 3110 3111 if (ifp->if_mtu > sp->lcp.their_mru) { 3112 sp->pp_saved_mtu = ifp->if_mtu; 3113 ifp->if_mtu = sp->lcp.their_mru; 3114 if (debug) 3115 log(LOG_DEBUG, 3116 SPP_FMT "setting MTU to %" PRIu64 " bytes\n", 3117 SPP_ARGS(ifp), ifp->if_mtu); 3118 } 3119 3120 if (sp->pp_con) 3121 sp->pp_con(sp); 3122 } 3123 3124 static void 3125 sppp_ipcp_tld(struct sppp *sp) 3126 { 3127 } 3128 3129 static void 3130 sppp_ipcp_tls(struct sppp *sp) 3131 { 3132 /* indicate to LCP that it must stay alive */ 3133 sp->lcp.protos |= (1 << IDX_IPCP); 3134 } 3135 3136 static void 3137 sppp_ipcp_tlf(struct sppp *sp) 3138 { 3139 /* we no longer need LCP */ 3140 sp->lcp.protos &= ~(1 << IDX_IPCP); 3141 } 3142 3143 static void 3144 sppp_ipcp_scr(struct sppp *sp) 3145 { 3146 char opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3147 u_int32_t ouraddr; 3148 int i = 0; 3149 3150 #ifdef notyet 3151 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3152 opt[i++] = IPCP_OPT_COMPRESSION; 3153 opt[i++] = 6; 3154 opt[i++] = 0; /* VJ header compression */ 3155 opt[i++] = 0x2d; /* VJ header compression */ 3156 opt[i++] = max_slot_id; 3157 opt[i++] = comp_slot_id; 3158 } 3159 #endif 3160 3161 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3162 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3163 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3164 else 3165 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3166 opt[i++] = IPCP_OPT_ADDRESS; 3167 opt[i++] = 6; 3168 opt[i++] = ouraddr >> 24; 3169 opt[i++] = ouraddr >> 16; 3170 opt[i++] = ouraddr >> 8; 3171 opt[i++] = ouraddr; 3172 } 3173 3174 if (sp->query_dns & 1) { 3175 opt[i++] = IPCP_OPT_PRIMDNS; 3176 opt[i++] = 6; 3177 opt[i++] = sp->dns_addrs[0] >> 24; 3178 opt[i++] = sp->dns_addrs[0] >> 16; 3179 opt[i++] = sp->dns_addrs[0] >> 8; 3180 opt[i++] = sp->dns_addrs[0]; 3181 } 3182 if (sp->query_dns & 2) { 3183 opt[i++] = IPCP_OPT_SECDNS; 3184 opt[i++] = 6; 3185 opt[i++] = sp->dns_addrs[1] >> 24; 3186 opt[i++] = sp->dns_addrs[1] >> 16; 3187 opt[i++] = sp->dns_addrs[1] >> 8; 3188 opt[i++] = sp->dns_addrs[1]; 3189 } 3190 3191 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3192 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3193 } 3194 3195 3196 /* 3197 *--------------------------------------------------------------------------* 3198 * * 3199 * The IPv6CP implementation. * 3200 * * 3201 *--------------------------------------------------------------------------* 3202 */ 3203 3204 #ifdef INET6 3205 static void 3206 sppp_ipv6cp_init(struct sppp *sp) 3207 { 3208 sp->ipv6cp.opts = 0; 3209 sp->ipv6cp.flags = 0; 3210 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3211 sp->fail_counter[IDX_IPV6CP] = 0; 3212 sp->pp_seq[IDX_IPV6CP] = 0; 3213 sp->pp_rseq[IDX_IPV6CP] = 0; 3214 callout_init(&sp->ch[IDX_IPV6CP]); 3215 } 3216 3217 static void 3218 sppp_ipv6cp_up(struct sppp *sp) 3219 { 3220 sppp_up_event(&ipv6cp, sp); 3221 } 3222 3223 static void 3224 sppp_ipv6cp_down(struct sppp *sp) 3225 { 3226 sppp_down_event(&ipv6cp, sp); 3227 } 3228 3229 static void 3230 sppp_ipv6cp_open(struct sppp *sp) 3231 { 3232 STDDCL; 3233 struct in6_addr myaddr, hisaddr; 3234 3235 #ifdef IPV6CP_MYIFID_DYN 3236 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3237 #else 3238 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3239 #endif 3240 3241 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3242 /* 3243 * If we don't have our address, this probably means our 3244 * interface doesn't want to talk IPv6 at all. (This could 3245 * be the case if somebody wants to speak only IPX, for 3246 * example.) Don't open IPv6CP in this case. 3247 */ 3248 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3249 /* XXX this message should go away */ 3250 if (debug) 3251 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n", 3252 SPP_ARGS(ifp)); 3253 return; 3254 } 3255 3256 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3257 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3258 sppp_open_event(&ipv6cp, sp); 3259 } 3260 3261 static void 3262 sppp_ipv6cp_close(struct sppp *sp) 3263 { 3264 sppp_close_event(&ipv6cp, sp); 3265 } 3266 3267 static void 3268 sppp_ipv6cp_TO(void *cookie) 3269 { 3270 sppp_to_event(&ipv6cp, (struct sppp *)cookie); 3271 } 3272 3273 /* 3274 * Analyze a configure request. Return true if it was agreeable, and 3275 * caused action sca, false if it has been rejected or nak'ed, and 3276 * caused action scn. (The return value is used to make the state 3277 * transition decision in the state automaton.) 3278 */ 3279 static int 3280 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3281 { 3282 u_char *buf, *r, *p; 3283 struct ifnet *ifp = &sp->pp_if; 3284 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3285 struct in6_addr myaddr, desiredaddr, suggestaddr; 3286 int ifidcount; 3287 int type; 3288 int collision, nohisaddr; 3289 3290 len -= 4; 3291 origlen = len; 3292 /* 3293 * Make sure to allocate a buf that can at least hold a 3294 * conf-nak with an `address' option. We might need it below. 3295 */ 3296 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 3297 if (! buf) 3298 return (0); 3299 3300 /* pass 1: see if we can recognize them */ 3301 if (debug) 3302 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:", 3303 SPP_ARGS(ifp)); 3304 p = (void*) (h+1); 3305 ifidcount = 0; 3306 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3307 if (debug) 3308 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3309 switch (*p) { 3310 case IPV6CP_OPT_IFID: 3311 if (len >= 10 && p[1] == 10 && ifidcount == 0) { 3312 /* correctly formed address option */ 3313 ifidcount++; 3314 continue; 3315 } 3316 if (debug) 3317 addlog(" [invalid]"); 3318 break; 3319 #ifdef notyet 3320 case IPV6CP_OPT_COMPRESSION: 3321 if (len >= 4 && p[1] >= 4) { 3322 /* correctly formed compress option */ 3323 continue; 3324 } 3325 if (debug) 3326 addlog(" [invalid]"); 3327 break; 3328 #endif 3329 default: 3330 /* Others not supported. */ 3331 if (debug) 3332 addlog(" [rej]"); 3333 break; 3334 } 3335 /* Add the option to rejected list. */ 3336 bcopy (p, r, p[1]); 3337 r += p[1]; 3338 rlen += p[1]; 3339 } 3340 if (rlen) { 3341 if (debug) 3342 addlog(" send conf-rej\n"); 3343 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3344 goto end; 3345 } else if (debug) 3346 addlog("\n"); 3347 3348 /* pass 2: parse option values */ 3349 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3350 if (debug) 3351 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ", 3352 SPP_ARGS(ifp)); 3353 p = (void*) (h+1); 3354 len = origlen; 3355 type = CONF_ACK; 3356 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3357 if (debug) 3358 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3359 switch (*p) { 3360 #ifdef notyet 3361 case IPV6CP_OPT_COMPRESSION: 3362 continue; 3363 #endif 3364 case IPV6CP_OPT_IFID: 3365 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3366 bcopy(&p[2], &desiredaddr.s6_addr[8], 8); 3367 collision = (memcmp(&desiredaddr.s6_addr[8], 3368 &myaddr.s6_addr[8], 8) == 0); 3369 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3370 3371 desiredaddr.s6_addr16[0] = htons(0xfe80); 3372 desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3373 3374 if (!collision && !nohisaddr) { 3375 /* no collision, hisaddr known - Conf-Ack */ 3376 type = CONF_ACK; 3377 3378 if (debug) { 3379 addlog(" %s [%s]", 3380 ip6_sprintf(&desiredaddr), 3381 sppp_cp_type_name(type)); 3382 } 3383 continue; 3384 } 3385 3386 memset(&suggestaddr, 0, sizeof(&suggestaddr)); 3387 if (collision && nohisaddr) { 3388 /* collision, hisaddr unknown - Conf-Rej */ 3389 type = CONF_REJ; 3390 memset(&p[2], 0, 8); 3391 } else { 3392 /* 3393 * - no collision, hisaddr unknown, or 3394 * - collision, hisaddr known 3395 * Conf-Nak, suggest hisaddr 3396 */ 3397 type = CONF_NAK; 3398 sppp_suggest_ip6_addr(sp, &suggestaddr); 3399 bcopy(&suggestaddr.s6_addr[8], &p[2], 8); 3400 } 3401 if (debug) 3402 addlog(" %s [%s]", ip6_sprintf(&desiredaddr), 3403 sppp_cp_type_name(type)); 3404 break; 3405 } 3406 /* Add the option to nak'ed list. */ 3407 bcopy (p, r, p[1]); 3408 r += p[1]; 3409 rlen += p[1]; 3410 } 3411 3412 if (rlen == 0 && type == CONF_ACK) { 3413 if (debug) 3414 addlog(" send %s\n", sppp_cp_type_name(type)); 3415 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1); 3416 } else { 3417 #ifdef notdef 3418 if (type == CONF_ACK) 3419 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3420 #endif 3421 3422 if (debug) { 3423 addlog(" send %s suggest %s\n", 3424 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr)); 3425 } 3426 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3427 } 3428 3429 end: 3430 free (buf, M_TEMP); 3431 return (rlen == 0); 3432 } 3433 3434 /* 3435 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3436 * negotiation. 3437 */ 3438 static void 3439 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3440 { 3441 u_char *buf, *p; 3442 struct ifnet *ifp = &sp->pp_if; 3443 int debug = ifp->if_flags & IFF_DEBUG; 3444 3445 len -= 4; 3446 buf = malloc (len, M_TEMP, M_NOWAIT); 3447 if (!buf) 3448 return; 3449 3450 if (debug) 3451 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:", 3452 SPP_ARGS(ifp)); 3453 3454 p = (void*) (h+1); 3455 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3456 if (debug) 3457 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3458 switch (*p) { 3459 case IPV6CP_OPT_IFID: 3460 /* 3461 * Peer doesn't grok address option. This is 3462 * bad. XXX Should we better give up here? 3463 */ 3464 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3465 break; 3466 #ifdef notyet 3467 case IPV6CP_OPT_COMPRESS: 3468 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3469 break; 3470 #endif 3471 } 3472 } 3473 if (debug) 3474 addlog("\n"); 3475 free (buf, M_TEMP); 3476 return; 3477 } 3478 3479 /* 3480 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3481 * negotiation. 3482 */ 3483 static void 3484 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3485 { 3486 u_char *buf, *p; 3487 struct ifnet *ifp = &sp->pp_if; 3488 int debug = ifp->if_flags & IFF_DEBUG; 3489 struct in6_addr suggestaddr; 3490 3491 len -= 4; 3492 buf = malloc (len, M_TEMP, M_NOWAIT); 3493 if (!buf) 3494 return; 3495 3496 if (debug) 3497 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:", 3498 SPP_ARGS(ifp)); 3499 3500 p = (void*) (h+1); 3501 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3502 if (debug) 3503 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3504 switch (*p) { 3505 case IPV6CP_OPT_IFID: 3506 /* 3507 * Peer doesn't like our local ifid. See 3508 * if we can do something for him. We'll drop 3509 * him our address then. 3510 */ 3511 if (len < 10 || p[1] != 10) 3512 break; 3513 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3514 suggestaddr.s6_addr16[0] = htons(0xfe80); 3515 suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3516 bcopy(&p[2], &suggestaddr.s6_addr[8], 8); 3517 3518 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3519 if (debug) 3520 addlog(" [suggestaddr %s]", 3521 ip6_sprintf(&suggestaddr)); 3522 #ifdef IPV6CP_MYIFID_DYN 3523 /* 3524 * When doing dynamic address assignment, 3525 * we accept his offer. 3526 */ 3527 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3528 struct in6_addr lastsuggest; 3529 /* 3530 * If <suggested myaddr from peer> equals to 3531 * <hisaddr we have suggested last time>, 3532 * we have a collision. generate new random 3533 * ifid. 3534 */ 3535 sppp_suggest_ip6_addr(&lastsuggest); 3536 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3537 lastsuggest)) { 3538 if (debug) 3539 addlog(" [random]"); 3540 sppp_gen_ip6_addr(sp, &suggestaddr); 3541 } 3542 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3543 if (debug) 3544 addlog(" [agree]"); 3545 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3546 } 3547 #else 3548 /* 3549 * Since we do not do dynamic address assignment, 3550 * we ignore it and thus continue to negotiate 3551 * our already existing value. This can possibly 3552 * go into infinite request-reject loop. 3553 * 3554 * This is not likely because we normally use 3555 * ifid based on MAC-address. 3556 * If you have no ethernet card on the node, too bad. 3557 * XXX should we use fail_counter? 3558 */ 3559 #endif 3560 break; 3561 #ifdef notyet 3562 case IPV6CP_OPT_COMPRESS: 3563 /* 3564 * Peer wants different compression parameters. 3565 */ 3566 break; 3567 #endif 3568 } 3569 } 3570 if (debug) 3571 addlog("\n"); 3572 free (buf, M_TEMP); 3573 return; 3574 } 3575 3576 static void 3577 sppp_ipv6cp_tlu(struct sppp *sp) 3578 { 3579 /* we are up - notify isdn daemon */ 3580 if (sp->pp_con) 3581 sp->pp_con(sp); 3582 } 3583 3584 static void 3585 sppp_ipv6cp_tld(struct sppp *sp) 3586 { 3587 } 3588 3589 static void 3590 sppp_ipv6cp_tls(struct sppp *sp) 3591 { 3592 /* indicate to LCP that it must stay alive */ 3593 sp->lcp.protos |= (1 << IDX_IPV6CP); 3594 } 3595 3596 static void 3597 sppp_ipv6cp_tlf(struct sppp *sp) 3598 { 3599 /* we no longer need LCP */ 3600 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3601 } 3602 3603 static void 3604 sppp_ipv6cp_scr(struct sppp *sp) 3605 { 3606 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3607 struct in6_addr ouraddr; 3608 int i = 0; 3609 3610 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3611 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3612 opt[i++] = IPV6CP_OPT_IFID; 3613 opt[i++] = 10; 3614 bcopy(&ouraddr.s6_addr[8], &opt[i], 8); 3615 i += 8; 3616 } 3617 3618 #ifdef notyet 3619 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 3620 opt[i++] = IPV6CP_OPT_COMPRESSION; 3621 opt[i++] = 4; 3622 opt[i++] = 0; /* TBD */ 3623 opt[i++] = 0; /* TBD */ 3624 /* variable length data may follow */ 3625 } 3626 #endif 3627 3628 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 3629 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 3630 } 3631 #else /*INET6*/ 3632 static void sppp_ipv6cp_init(struct sppp *sp) 3633 { 3634 } 3635 3636 static void sppp_ipv6cp_up(struct sppp *sp) 3637 { 3638 } 3639 3640 static void sppp_ipv6cp_down(struct sppp *sp) 3641 { 3642 } 3643 3644 3645 static void sppp_ipv6cp_open(struct sppp *sp) 3646 { 3647 } 3648 3649 static void sppp_ipv6cp_close(struct sppp *sp) 3650 { 3651 } 3652 3653 static void sppp_ipv6cp_TO(void *sp) 3654 { 3655 } 3656 3657 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3658 { 3659 return 0; 3660 } 3661 3662 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3663 { 3664 } 3665 3666 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3667 { 3668 } 3669 3670 static void sppp_ipv6cp_tlu(struct sppp *sp) 3671 { 3672 } 3673 3674 static void sppp_ipv6cp_tld(struct sppp *sp) 3675 { 3676 } 3677 3678 static void sppp_ipv6cp_tls(struct sppp *sp) 3679 { 3680 } 3681 3682 static void sppp_ipv6cp_tlf(struct sppp *sp) 3683 { 3684 } 3685 3686 static void sppp_ipv6cp_scr(struct sppp *sp) 3687 { 3688 } 3689 #endif /*INET6*/ 3690 3691 3692 /* 3693 *--------------------------------------------------------------------------* 3694 * * 3695 * The CHAP implementation. * 3696 * * 3697 *--------------------------------------------------------------------------* 3698 */ 3699 3700 /* 3701 * The authentication protocols don't employ a full-fledged state machine as 3702 * the control protocols do, since they do have Open and Close events, but 3703 * not Up and Down, nor are they explicitly terminated. Also, use of the 3704 * authentication protocols may be different in both directions (this makes 3705 * sense, think of a machine that never accepts incoming calls but only 3706 * calls out, it doesn't require the called party to authenticate itself). 3707 * 3708 * Our state machine for the local authentication protocol (we are requesting 3709 * the peer to authenticate) looks like: 3710 * 3711 * RCA- 3712 * +--------------------------------------------+ 3713 * V scn,tld| 3714 * +--------+ Close +---------+ RCA+ 3715 * | |<----------------------------------| |------+ 3716 * +--->| Closed | TO* | Opened | sca | 3717 * | | |-----+ +-------| |<-----+ 3718 * | +--------+ irc | | +---------+ 3719 * | ^ | | ^ 3720 * | | | | | 3721 * | | | | | 3722 * | TO-| | | | 3723 * | |tld TO+ V | | 3724 * | | +------->+ | | 3725 * | | | | | | 3726 * | +--------+ V | | 3727 * | | |<----+<--------------------+ | 3728 * | | Req- | scr | 3729 * | | Sent | | 3730 * | | | | 3731 * | +--------+ | 3732 * | RCA- | | RCA+ | 3733 * +------+ +------------------------------------------+ 3734 * scn,tld sca,irc,ict,tlu 3735 * 3736 * 3737 * with: 3738 * 3739 * Open: LCP reached authentication phase 3740 * Close: LCP reached terminate phase 3741 * 3742 * RCA+: received reply (pap-req, chap-response), acceptable 3743 * RCN: received reply (pap-req, chap-response), not acceptable 3744 * TO+: timeout with restart counter >= 0 3745 * TO-: timeout with restart counter < 0 3746 * TO*: reschedule timeout for CHAP 3747 * 3748 * scr: send request packet (none for PAP, chap-challenge) 3749 * sca: send ack packet (pap-ack, chap-success) 3750 * scn: send nak packet (pap-nak, chap-failure) 3751 * ict: initialize re-challenge timer (CHAP only) 3752 * 3753 * tlu: this-layer-up, LCP reaches network phase 3754 * tld: this-layer-down, LCP enters terminate phase 3755 * 3756 * Note that in CHAP mode, after sending a new challenge, while the state 3757 * automaton falls back into Req-Sent state, it doesn't signal a tld 3758 * event to LCP, so LCP remains in network phase. Only after not getting 3759 * any response (or after getting an unacceptable response), CHAP closes, 3760 * causing LCP to enter terminate phase. 3761 * 3762 * With PAP, there is no initial request that can be sent. The peer is 3763 * expected to send one based on the successful negotiation of PAP as 3764 * the authentication protocol during the LCP option negotiation. 3765 * 3766 * Incoming authentication protocol requests (remote requests 3767 * authentication, we are peer) don't employ a state machine at all, 3768 * they are simply answered. Some peers [Ascend P50 firmware rev 3769 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 3770 * still in authentication phase (thereby violating the standard that 3771 * demands that these NCP packets are to be discarded), so we keep 3772 * track of the peer demanding us to authenticate, and only proceed to 3773 * phase network once we've seen a positive acknowledge for the 3774 * authentication. 3775 */ 3776 3777 /* 3778 * Handle incoming CHAP packets. 3779 */ 3780 void 3781 sppp_chap_input(struct sppp *sp, struct mbuf *m) 3782 { 3783 STDDCL; 3784 struct lcp_header *h; 3785 int len, x; 3786 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 3787 int value_len, name_len; 3788 MD5_CTX ctx; 3789 3790 len = m->m_pkthdr.len; 3791 if (len < 4) { 3792 if (debug) 3793 log(LOG_DEBUG, 3794 SPP_FMT "chap invalid packet length: %d bytes\n", 3795 SPP_ARGS(ifp), len); 3796 return; 3797 } 3798 h = mtod (m, struct lcp_header*); 3799 if (len > ntohs (h->len)) 3800 len = ntohs (h->len); 3801 3802 switch (h->type) { 3803 /* challenge, failure and success are his authproto */ 3804 case CHAP_CHALLENGE: 3805 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 3806 /* can't do anything usefull */ 3807 sp->pp_auth_failures++; 3808 printf(SPP_FMT "chap input without my name and my secret being set\n", 3809 SPP_ARGS(ifp)); 3810 break; 3811 } 3812 value = 1 + (u_char*)(h+1); 3813 value_len = value[-1]; 3814 name = value + value_len; 3815 name_len = len - value_len - 5; 3816 if (name_len < 0) { 3817 if (debug) { 3818 log(LOG_DEBUG, 3819 SPP_FMT "chap corrupted challenge " 3820 "<%s id=0x%x len=%d", 3821 SPP_ARGS(ifp), 3822 sppp_auth_type_name(PPP_CHAP, h->type), 3823 h->ident, ntohs(h->len)); 3824 if (len > 4) 3825 sppp_print_bytes((u_char*) (h+1), len-4); 3826 addlog(">\n"); 3827 } 3828 break; 3829 } 3830 3831 if (debug) { 3832 log(LOG_DEBUG, 3833 SPP_FMT "chap input <%s id=0x%x len=%d name=", 3834 SPP_ARGS(ifp), 3835 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 3836 ntohs(h->len)); 3837 sppp_print_string((char*) name, name_len); 3838 addlog(" value-size=%d value=", value_len); 3839 sppp_print_bytes(value, value_len); 3840 addlog(">\n"); 3841 } 3842 3843 /* Compute reply value. */ 3844 MD5Init(&ctx); 3845 MD5Update(&ctx, &h->ident, 1); 3846 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 3847 MD5Update(&ctx, value, value_len); 3848 MD5Final(digest, &ctx); 3849 dsize = sizeof digest; 3850 3851 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 3852 sizeof dsize, (const char *)&dsize, 3853 sizeof digest, digest, 3854 sp->myauth.name_len, 3855 sp->myauth.name, 3856 0); 3857 break; 3858 3859 case CHAP_SUCCESS: 3860 if (debug) { 3861 log(LOG_DEBUG, SPP_FMT "chap success", 3862 SPP_ARGS(ifp)); 3863 if (len > 4) { 3864 addlog(": "); 3865 sppp_print_string((char*)(h + 1), len - 4); 3866 } 3867 addlog("\n"); 3868 } 3869 x = splnet(); 3870 sp->pp_auth_failures = 0; 3871 sp->pp_flags &= ~PP_NEEDAUTH; 3872 if (sp->myauth.proto == PPP_CHAP && 3873 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 3874 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 3875 /* 3876 * We are authenticator for CHAP but didn't 3877 * complete yet. Leave it to tlu to proceed 3878 * to network phase. 3879 */ 3880 splx(x); 3881 break; 3882 } 3883 splx(x); 3884 sppp_phase_network(sp); 3885 break; 3886 3887 case CHAP_FAILURE: 3888 x = splnet(); 3889 sp->pp_auth_failures++; 3890 splx(x); 3891 if (debug) { 3892 log(LOG_INFO, SPP_FMT "chap failure", 3893 SPP_ARGS(ifp)); 3894 if (len > 4) { 3895 addlog(": "); 3896 sppp_print_string((char*)(h + 1), len - 4); 3897 } 3898 addlog("\n"); 3899 } else 3900 log(LOG_INFO, SPP_FMT "chap failure\n", 3901 SPP_ARGS(ifp)); 3902 /* await LCP shutdown by authenticator */ 3903 break; 3904 3905 /* response is my authproto */ 3906 case CHAP_RESPONSE: 3907 if (sp->hisauth.secret == NULL) { 3908 /* can't do anything usefull */ 3909 printf(SPP_FMT "chap input without his secret being set\n", 3910 SPP_ARGS(ifp)); 3911 break; 3912 } 3913 value = 1 + (u_char*)(h+1); 3914 value_len = value[-1]; 3915 name = value + value_len; 3916 name_len = len - value_len - 5; 3917 if (name_len < 0) { 3918 if (debug) { 3919 log(LOG_DEBUG, 3920 SPP_FMT "chap corrupted response " 3921 "<%s id=0x%x len=%d", 3922 SPP_ARGS(ifp), 3923 sppp_auth_type_name(PPP_CHAP, h->type), 3924 h->ident, ntohs(h->len)); 3925 if (len > 4) 3926 sppp_print_bytes((u_char*)(h+1), len-4); 3927 addlog(">\n"); 3928 } 3929 break; 3930 } 3931 if (h->ident != sp->confid[IDX_CHAP]) { 3932 if (debug) 3933 log(LOG_DEBUG, 3934 SPP_FMT "chap dropping response for old ID " 3935 "(got %d, expected %d)\n", 3936 SPP_ARGS(ifp), 3937 h->ident, sp->confid[IDX_CHAP]); 3938 break; 3939 } 3940 if (sp->hisauth.name != NULL && 3941 (name_len != sp->hisauth.name_len 3942 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 3943 log(LOG_INFO, SPP_FMT "chap response, his name ", 3944 SPP_ARGS(ifp)); 3945 sppp_print_string(name, name_len); 3946 addlog(" != expected "); 3947 sppp_print_string(sp->hisauth.name, 3948 sp->hisauth.name_len); 3949 addlog("\n"); 3950 goto chap_failure; 3951 } 3952 if (debug) { 3953 log(LOG_DEBUG, SPP_FMT "chap input(%s) " 3954 "<%s id=0x%x len=%d name=", 3955 SPP_ARGS(ifp), 3956 sppp_state_name(sp->state[IDX_CHAP]), 3957 sppp_auth_type_name(PPP_CHAP, h->type), 3958 h->ident, ntohs (h->len)); 3959 sppp_print_string((char*)name, name_len); 3960 addlog(" value-size=%d value=", value_len); 3961 sppp_print_bytes(value, value_len); 3962 addlog(">\n"); 3963 } 3964 if (value_len != sizeof(sp->myauth.challenge)) { 3965 if (debug) 3966 log(LOG_DEBUG, 3967 SPP_FMT "chap bad hash value length: " 3968 "%d bytes, should be %ld\n", 3969 SPP_ARGS(ifp), value_len, 3970 (long) sizeof(sp->myauth.challenge)); 3971 goto chap_failure; 3972 } 3973 3974 MD5Init(&ctx); 3975 MD5Update(&ctx, &h->ident, 1); 3976 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 3977 MD5Update(&ctx, sp->myauth.challenge, sizeof(sp->myauth.challenge)); 3978 MD5Final(digest, &ctx); 3979 3980 #define FAILMSG "Failed..." 3981 #define SUCCMSG "Welcome!" 3982 3983 if (value_len != sizeof digest || 3984 memcmp(digest, value, value_len) != 0) { 3985 chap_failure: 3986 /* action scn, tld */ 3987 x = splnet(); 3988 sp->pp_auth_failures++; 3989 splx(x); 3990 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 3991 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 3992 0); 3993 chap.tld(sp); 3994 break; 3995 } 3996 sp->pp_auth_failures = 0; 3997 /* action sca, perhaps tlu */ 3998 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 3999 sp->state[IDX_CHAP] == STATE_OPENED) 4000 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 4001 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 4002 0); 4003 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 4004 sppp_cp_change_state(&chap, sp, STATE_OPENED); 4005 chap.tlu(sp); 4006 } 4007 break; 4008 4009 default: 4010 /* Unknown CHAP packet type -- ignore. */ 4011 if (debug) { 4012 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) " 4013 "<0x%x id=0x%xh len=%d", 4014 SPP_ARGS(ifp), 4015 sppp_state_name(sp->state[IDX_CHAP]), 4016 h->type, h->ident, ntohs(h->len)); 4017 if (len > 4) 4018 sppp_print_bytes((u_char*)(h+1), len-4); 4019 addlog(">\n"); 4020 } 4021 break; 4022 4023 } 4024 } 4025 4026 static void 4027 sppp_chap_init(struct sppp *sp) 4028 { 4029 /* Chap doesn't have STATE_INITIAL at all. */ 4030 sp->state[IDX_CHAP] = STATE_CLOSED; 4031 sp->fail_counter[IDX_CHAP] = 0; 4032 sp->pp_seq[IDX_CHAP] = 0; 4033 sp->pp_rseq[IDX_CHAP] = 0; 4034 callout_init(&sp->ch[IDX_CHAP]); 4035 } 4036 4037 static void 4038 sppp_chap_open(struct sppp *sp) 4039 { 4040 if (sp->myauth.proto == PPP_CHAP && 4041 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4042 /* we are authenticator for CHAP, start it */ 4043 chap.scr(sp); 4044 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4045 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4046 } 4047 /* nothing to be done if we are peer, await a challenge */ 4048 } 4049 4050 static void 4051 sppp_chap_close(struct sppp *sp) 4052 { 4053 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4054 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4055 } 4056 4057 static void 4058 sppp_chap_TO(void *cookie) 4059 { 4060 struct sppp *sp = (struct sppp *)cookie; 4061 STDDCL; 4062 int s; 4063 4064 s = splnet(); 4065 if (debug) 4066 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n", 4067 SPP_ARGS(ifp), 4068 sppp_state_name(sp->state[IDX_CHAP]), 4069 sp->rst_counter[IDX_CHAP]); 4070 4071 if (--sp->rst_counter[IDX_CHAP] < 0) 4072 /* TO- event */ 4073 switch (sp->state[IDX_CHAP]) { 4074 case STATE_REQ_SENT: 4075 chap.tld(sp); 4076 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4077 break; 4078 } 4079 else 4080 /* TO+ (or TO*) event */ 4081 switch (sp->state[IDX_CHAP]) { 4082 case STATE_OPENED: 4083 /* TO* event */ 4084 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4085 /* fall through */ 4086 case STATE_REQ_SENT: 4087 chap.scr(sp); 4088 /* sppp_cp_change_state() will restart the timer */ 4089 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4090 break; 4091 } 4092 4093 splx(s); 4094 } 4095 4096 static void 4097 sppp_chap_tlu(struct sppp *sp) 4098 { 4099 STDDCL; 4100 int i, x; 4101 4102 i = 0; 4103 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4104 4105 /* 4106 * Some broken CHAP implementations (Conware CoNet, firmware 4107 * 4.0.?) don't want to re-authenticate their CHAP once the 4108 * initial challenge-response exchange has taken place. 4109 * Provide for an option to avoid rechallenges. 4110 */ 4111 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4112 /* 4113 * Compute the re-challenge timeout. This will yield 4114 * a number between 300 and 810 seconds. 4115 */ 4116 i = 300 + ((unsigned)(random() & 0xff00) >> 7); 4117 4118 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4119 } 4120 4121 if (debug) { 4122 log(LOG_DEBUG, 4123 SPP_FMT "chap %s, ", 4124 SPP_ARGS(ifp), 4125 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu"); 4126 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) 4127 addlog("next re-challenge in %d seconds\n", i); 4128 else 4129 addlog("re-challenging supressed\n"); 4130 } 4131 4132 x = splnet(); 4133 sp->pp_auth_failures = 0; 4134 /* indicate to LCP that we need to be closed down */ 4135 sp->lcp.protos |= (1 << IDX_CHAP); 4136 4137 if (sp->pp_flags & PP_NEEDAUTH) { 4138 /* 4139 * Remote is authenticator, but his auth proto didn't 4140 * complete yet. Defer the transition to network 4141 * phase. 4142 */ 4143 splx(x); 4144 return; 4145 } 4146 splx(x); 4147 4148 /* 4149 * If we are already in phase network, we are done here. This 4150 * is the case if this is a dummy tlu event after a re-challenge. 4151 */ 4152 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4153 sppp_phase_network(sp); 4154 } 4155 4156 static void 4157 sppp_chap_tld(struct sppp *sp) 4158 { 4159 STDDCL; 4160 4161 if (debug) 4162 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp)); 4163 callout_stop(&sp->ch[IDX_CHAP]); 4164 sp->lcp.protos &= ~(1 << IDX_CHAP); 4165 4166 lcp.Close(sp); 4167 } 4168 4169 static void 4170 sppp_chap_scr(struct sppp *sp) 4171 { 4172 struct timeval tv; 4173 u_int32_t *ch, seed; 4174 u_char clen; 4175 4176 if (sp->myauth.name == NULL) { 4177 /* can't do anything usefull */ 4178 printf(SPP_FMT "chap starting without my name being set\n", 4179 SPP_ARGS(&sp->pp_if)); 4180 return; 4181 } 4182 4183 /* Compute random challenge. */ 4184 ch = (u_int32_t *)sp->myauth.challenge; 4185 microtime(&tv); 4186 seed = tv.tv_sec ^ tv.tv_usec; 4187 ch[0] = seed ^ random(); 4188 ch[1] = seed ^ random(); 4189 ch[2] = seed ^ random(); 4190 ch[3] = seed ^ random(); 4191 clen = 16; /* 4 * sizeof(u_int32_t) */ 4192 4193 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4194 4195 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4196 sizeof clen, (const char *)&clen, 4197 sizeof(sp->myauth.challenge), sp->myauth.challenge, 4198 sp->myauth.name_len, 4199 sp->myauth.name, 4200 0); 4201 } 4202 4203 /* 4204 *--------------------------------------------------------------------------* 4205 * * 4206 * The PAP implementation. * 4207 * * 4208 *--------------------------------------------------------------------------* 4209 */ 4210 /* 4211 * For PAP, we need to keep a little state also if we are the peer, not the 4212 * authenticator. This is since we don't get a request to authenticate, but 4213 * have to repeatedly authenticate ourself until we got a response (or the 4214 * retry counter is expired). 4215 */ 4216 4217 /* 4218 * Handle incoming PAP packets. */ 4219 static void 4220 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4221 { 4222 STDDCL; 4223 struct lcp_header *h; 4224 int len, x; 4225 u_char mlen; 4226 char *name, *secret; 4227 int name_len, secret_len; 4228 4229 len = m->m_pkthdr.len; 4230 if (len < 5) { 4231 if (debug) 4232 log(LOG_DEBUG, 4233 SPP_FMT "pap invalid packet length: %d bytes\n", 4234 SPP_ARGS(ifp), len); 4235 return; 4236 } 4237 h = mtod (m, struct lcp_header*); 4238 if (len > ntohs (h->len)) 4239 len = ntohs (h->len); 4240 switch (h->type) { 4241 /* PAP request is my authproto */ 4242 case PAP_REQ: 4243 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4244 /* can't do anything usefull */ 4245 printf(SPP_FMT "pap request without his name and his secret being set\n", 4246 SPP_ARGS(ifp)); 4247 break; 4248 } 4249 name = 1 + (u_char*)(h+1); 4250 name_len = name[-1]; 4251 secret = name + name_len + 1; 4252 if (name_len > len - 6 || 4253 (secret_len = secret[-1]) > len - 6 - name_len) { 4254 if (debug) { 4255 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4256 "<%s id=0x%x len=%d", 4257 SPP_ARGS(ifp), 4258 sppp_auth_type_name(PPP_PAP, h->type), 4259 h->ident, ntohs(h->len)); 4260 if (len > 4) 4261 sppp_print_bytes((u_char*)(h+1), len-4); 4262 addlog(">\n"); 4263 } 4264 break; 4265 } 4266 if (debug) { 4267 log(LOG_DEBUG, SPP_FMT "pap input(%s) " 4268 "<%s id=0x%x len=%d name=", 4269 SPP_ARGS(ifp), 4270 sppp_state_name(sp->state[IDX_PAP]), 4271 sppp_auth_type_name(PPP_PAP, h->type), 4272 h->ident, ntohs(h->len)); 4273 sppp_print_string((char*)name, name_len); 4274 addlog(" secret="); 4275 sppp_print_string((char*)secret, secret_len); 4276 addlog(">\n"); 4277 } 4278 if (name_len != sp->hisauth.name_len || 4279 secret_len != sp->hisauth.secret_len || 4280 memcmp(name, sp->hisauth.name, name_len) != 0 || 4281 memcmp(secret, sp->hisauth.secret, secret_len) != 0) { 4282 /* action scn, tld */ 4283 sp->pp_auth_failures++; 4284 mlen = sizeof(FAILMSG) - 1; 4285 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4286 sizeof mlen, (const char *)&mlen, 4287 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 4288 0); 4289 pap.tld(sp); 4290 break; 4291 } 4292 /* action sca, perhaps tlu */ 4293 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4294 sp->state[IDX_PAP] == STATE_OPENED) { 4295 mlen = sizeof(SUCCMSG) - 1; 4296 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4297 sizeof mlen, (const char *)&mlen, 4298 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 4299 0); 4300 } 4301 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4302 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4303 pap.tlu(sp); 4304 } 4305 break; 4306 4307 /* ack and nak are his authproto */ 4308 case PAP_ACK: 4309 callout_stop(&sp->pap_my_to_ch); 4310 if (debug) { 4311 log(LOG_DEBUG, SPP_FMT "pap success", 4312 SPP_ARGS(ifp)); 4313 name_len = *(char *)h; 4314 if (len > 5 && name_len) { 4315 addlog(": "); 4316 sppp_print_string((char*)(h+1), name_len); 4317 } 4318 addlog("\n"); 4319 } 4320 x = splnet(); 4321 sp->pp_auth_failures = 0; 4322 sp->pp_flags &= ~PP_NEEDAUTH; 4323 if (sp->myauth.proto == PPP_PAP && 4324 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4325 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4326 /* 4327 * We are authenticator for PAP but didn't 4328 * complete yet. Leave it to tlu to proceed 4329 * to network phase. 4330 */ 4331 splx(x); 4332 break; 4333 } 4334 splx(x); 4335 sppp_phase_network(sp); 4336 break; 4337 4338 case PAP_NAK: 4339 callout_stop(&sp->pap_my_to_ch); 4340 sp->pp_auth_failures++; 4341 if (debug) { 4342 log(LOG_INFO, SPP_FMT "pap failure", 4343 SPP_ARGS(ifp)); 4344 name_len = *(char *)h; 4345 if (len > 5 && name_len) { 4346 addlog(": "); 4347 sppp_print_string((char*)(h+1), name_len); 4348 } 4349 addlog("\n"); 4350 } else 4351 log(LOG_INFO, SPP_FMT "pap failure\n", 4352 SPP_ARGS(ifp)); 4353 /* await LCP shutdown by authenticator */ 4354 break; 4355 4356 default: 4357 /* Unknown PAP packet type -- ignore. */ 4358 if (debug) { 4359 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4360 "<0x%x id=0x%x len=%d", 4361 SPP_ARGS(ifp), 4362 h->type, h->ident, ntohs(h->len)); 4363 if (len > 4) 4364 sppp_print_bytes((u_char*)(h+1), len-4); 4365 addlog(">\n"); 4366 } 4367 break; 4368 4369 } 4370 } 4371 4372 static void 4373 sppp_pap_init(struct sppp *sp) 4374 { 4375 /* PAP doesn't have STATE_INITIAL at all. */ 4376 sp->state[IDX_PAP] = STATE_CLOSED; 4377 sp->fail_counter[IDX_PAP] = 0; 4378 sp->pp_seq[IDX_PAP] = 0; 4379 sp->pp_rseq[IDX_PAP] = 0; 4380 callout_init(&sp->ch[IDX_PAP]); 4381 callout_init(&sp->pap_my_to_ch); 4382 } 4383 4384 static void 4385 sppp_pap_open(struct sppp *sp) 4386 { 4387 if (sp->hisauth.proto == PPP_PAP && 4388 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4389 /* we are authenticator for PAP, start our timer */ 4390 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4391 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4392 } 4393 if (sp->myauth.proto == PPP_PAP) { 4394 /* we are peer, send a request, and start a timer */ 4395 pap.scr(sp); 4396 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4397 sppp_pap_my_TO, sp); 4398 } 4399 } 4400 4401 static void 4402 sppp_pap_close(struct sppp *sp) 4403 { 4404 if (sp->state[IDX_PAP] != STATE_CLOSED) 4405 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4406 } 4407 4408 /* 4409 * That's the timeout routine if we are authenticator. Since the 4410 * authenticator is basically passive in PAP, we can't do much here. 4411 */ 4412 static void 4413 sppp_pap_TO(void *cookie) 4414 { 4415 struct sppp *sp = (struct sppp *)cookie; 4416 STDDCL; 4417 int s; 4418 4419 s = splnet(); 4420 if (debug) 4421 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n", 4422 SPP_ARGS(ifp), 4423 sppp_state_name(sp->state[IDX_PAP]), 4424 sp->rst_counter[IDX_PAP]); 4425 4426 if (--sp->rst_counter[IDX_PAP] < 0) 4427 /* TO- event */ 4428 switch (sp->state[IDX_PAP]) { 4429 case STATE_REQ_SENT: 4430 pap.tld(sp); 4431 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4432 break; 4433 } 4434 else 4435 /* TO+ event, not very much we could do */ 4436 switch (sp->state[IDX_PAP]) { 4437 case STATE_REQ_SENT: 4438 /* sppp_cp_change_state() will restart the timer */ 4439 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4440 break; 4441 } 4442 4443 splx(s); 4444 } 4445 4446 /* 4447 * That's the timeout handler if we are peer. Since the peer is active, 4448 * we need to retransmit our PAP request since it is apparently lost. 4449 * XXX We should impose a max counter. 4450 */ 4451 static void 4452 sppp_pap_my_TO(void *cookie) 4453 { 4454 struct sppp *sp = (struct sppp *)cookie; 4455 STDDCL; 4456 4457 if (debug) 4458 log(LOG_DEBUG, SPP_FMT "pap peer TO\n", 4459 SPP_ARGS(ifp)); 4460 4461 pap.scr(sp); 4462 } 4463 4464 static void 4465 sppp_pap_tlu(struct sppp *sp) 4466 { 4467 STDDCL; 4468 int x; 4469 4470 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4471 4472 if (debug) 4473 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 4474 SPP_ARGS(ifp), pap.name); 4475 4476 x = splnet(); 4477 sp->pp_auth_failures = 0; 4478 /* indicate to LCP that we need to be closed down */ 4479 sp->lcp.protos |= (1 << IDX_PAP); 4480 4481 if (sp->pp_flags & PP_NEEDAUTH) { 4482 /* 4483 * Remote is authenticator, but his auth proto didn't 4484 * complete yet. Defer the transition to network 4485 * phase. 4486 */ 4487 splx(x); 4488 return; 4489 } 4490 splx(x); 4491 sppp_phase_network(sp); 4492 } 4493 4494 static void 4495 sppp_pap_tld(struct sppp *sp) 4496 { 4497 STDDCL; 4498 4499 if (debug) 4500 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp)); 4501 callout_stop(&sp->ch[IDX_PAP]); 4502 callout_stop(&sp->pap_my_to_ch); 4503 sp->lcp.protos &= ~(1 << IDX_PAP); 4504 4505 lcp.Close(sp); 4506 } 4507 4508 static void 4509 sppp_pap_scr(struct sppp *sp) 4510 { 4511 u_char idlen, pwdlen; 4512 4513 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4514 /* can't do anything usefull */ 4515 printf(SPP_FMT "pap starting without my name and secret being set\n", 4516 SPP_ARGS(&sp->pp_if)); 4517 return; 4518 } 4519 4520 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4521 pwdlen = sp->myauth.secret_len; 4522 idlen = sp->myauth.name_len; 4523 4524 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 4525 sizeof idlen, (const char *)&idlen, 4526 idlen, sp->myauth.name, 4527 sizeof pwdlen, (const char *)&pwdlen, 4528 pwdlen, sp->myauth.secret, 4529 0); 4530 } 4531 4532 /* 4533 * Random miscellaneous functions. 4534 */ 4535 4536 /* 4537 * Send a PAP or CHAP proto packet. 4538 * 4539 * Varadic function, each of the elements for the ellipsis is of type 4540 * ``size_t mlen, const u_char *msg''. Processing will stop iff 4541 * mlen == 0. 4542 * NOTE: never declare variadic functions with types subject to type 4543 * promotion (i.e. u_char). This is asking for big trouble depending 4544 * on the architecture you are on... 4545 */ 4546 4547 static void 4548 sppp_auth_send(const struct cp *cp, struct sppp *sp, 4549 unsigned int type, unsigned int id, 4550 ...) 4551 { 4552 STDDCL; 4553 struct lcp_header *lh; 4554 struct mbuf *m; 4555 u_char *p; 4556 int len; 4557 size_t pkthdrlen; 4558 unsigned int mlen; 4559 const char *msg; 4560 va_list ap; 4561 4562 MGETHDR (m, M_DONTWAIT, MT_DATA); 4563 if (! m) 4564 return; 4565 m->m_pkthdr.rcvif = 0; 4566 4567 if (sp->pp_flags & PP_NOFRAMING) { 4568 *mtod(m, u_int16_t*) = htons(cp->proto); 4569 pkthdrlen = 2; 4570 lh = (struct lcp_header*)(mtod(m, u_int8_t*)+2); 4571 } else { 4572 struct ppp_header *h; 4573 h = mtod (m, struct ppp_header*); 4574 h->address = PPP_ALLSTATIONS; /* broadcast address */ 4575 h->control = PPP_UI; /* Unnumbered Info */ 4576 h->protocol = htons(cp->proto); 4577 pkthdrlen = PPP_HEADER_LEN; 4578 4579 lh = (struct lcp_header*)(h + 1); 4580 } 4581 4582 lh->type = type; 4583 lh->ident = id; 4584 p = (u_char*) (lh+1); 4585 4586 va_start(ap, id); 4587 len = 0; 4588 4589 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 4590 msg = va_arg(ap, const char *); 4591 len += mlen; 4592 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 4593 va_end(ap); 4594 m_freem(m); 4595 return; 4596 } 4597 4598 bcopy(msg, p, mlen); 4599 p += mlen; 4600 } 4601 va_end(ap); 4602 4603 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 4604 lh->len = htons (LCP_HEADER_LEN + len); 4605 4606 if (debug) { 4607 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 4608 SPP_ARGS(ifp), cp->name, 4609 sppp_auth_type_name(cp->proto, lh->type), 4610 lh->ident, ntohs(lh->len)); 4611 if (len) 4612 sppp_print_bytes((u_char*) (lh+1), len); 4613 addlog(">\n"); 4614 } 4615 if (IF_QFULL (&sp->pp_cpq)) { 4616 IF_DROP (&sp->pp_fastq); 4617 IF_DROP (&ifp->if_snd); 4618 m_freem (m); 4619 ++ifp->if_oerrors; 4620 return; 4621 } else 4622 IF_ENQUEUE (&sp->pp_cpq, m); 4623 if (! (ifp->if_flags & IFF_OACTIVE)) 4624 (*ifp->if_start) (ifp); 4625 ifp->if_obytes += m->m_pkthdr.len + 3; 4626 } 4627 4628 /* 4629 * Send keepalive packets, every 10 seconds. 4630 */ 4631 static void 4632 sppp_keepalive(void *dummy) 4633 { 4634 struct sppp *sp; 4635 int s; 4636 time_t now; 4637 4638 s = splnet(); 4639 now = mono_time.tv_sec; 4640 for (sp=spppq; sp; sp=sp->pp_next) { 4641 struct ifnet *ifp = &sp->pp_if; 4642 4643 /* check idle timeout */ 4644 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 4645 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 4646 /* idle timeout is enabled for this interface */ 4647 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 4648 if (ifp->if_flags & IFF_DEBUG) 4649 printf("%s: no activitiy for %lu seconds\n", 4650 sp->pp_if.if_xname, 4651 (unsigned long)(now-sp->pp_last_activity)); 4652 lcp.Close(sp); 4653 continue; 4654 } 4655 } 4656 4657 /* Keepalive mode disabled or channel down? */ 4658 if (! (sp->pp_flags & PP_KEEPALIVE) || 4659 ! (ifp->if_flags & IFF_RUNNING)) 4660 continue; 4661 4662 /* No keepalive in PPP mode if LCP not opened yet. */ 4663 if (! (sp->pp_flags & PP_CISCO) && 4664 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) 4665 continue; 4666 4667 /* No echo reply, but maybe user data passed through? */ 4668 if ((now - sp->pp_last_activity) < LCP_KEEPALIVE_INTERVAL) { 4669 sp->pp_alivecnt = 0; 4670 continue; 4671 } 4672 4673 if (sp->pp_alivecnt == MAXALIVECNT) { 4674 /* No keepalive packets got. Stop the interface. */ 4675 if_down (ifp); 4676 IF_PURGE (&sp->pp_cpq); 4677 if (! (sp->pp_flags & PP_CISCO)) { 4678 printf("%s: LCP keepalive timed out, going to restart the connection\n", 4679 ifp->if_xname); 4680 sp->pp_alivecnt = 0; 4681 4682 /* we are down, close all open protocols */ 4683 lcp.Close(sp); 4684 4685 /* And now prepare LCP to reestablish the link, if configured to do so. */ 4686 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 4687 4688 /* Close connection imediatly, completition of this 4689 * will summon the magic needed to reestablish it. */ 4690 sp->pp_tlf(sp); 4691 continue; 4692 } 4693 } 4694 if (sp->pp_alivecnt <= MAXALIVECNT) 4695 ++sp->pp_alivecnt; 4696 if (sp->pp_flags & PP_CISCO) 4697 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ, 4698 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 4699 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 4700 int32_t nmagic = htonl (sp->lcp.magic); 4701 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 4702 sppp_cp_send (sp, PPP_LCP, ECHO_REQ, 4703 sp->lcp.echoid, 4, &nmagic); 4704 } 4705 } 4706 splx(s); 4707 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 4708 } 4709 4710 /* 4711 * Get both IP addresses. 4712 */ 4713 static void 4714 sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, u_int32_t *srcmask) 4715 { 4716 struct ifnet *ifp = &sp->pp_if; 4717 struct ifaddr *ifa; 4718 struct sockaddr_in *si, *sm; 4719 u_int32_t ssrc, ddst; 4720 4721 sm = NULL; 4722 ssrc = ddst = 0; 4723 /* 4724 * Pick the first AF_INET address from the list, 4725 * aliases don't make any sense on a p2p link anyway. 4726 */ 4727 si = 0; 4728 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 4729 if (ifa->ifa_addr->sa_family == AF_INET) { 4730 si = (struct sockaddr_in *)ifa->ifa_addr; 4731 sm = (struct sockaddr_in *)ifa->ifa_netmask; 4732 if (si) 4733 break; 4734 } 4735 } 4736 if (ifa) { 4737 if (si && si->sin_addr.s_addr) { 4738 ssrc = si->sin_addr.s_addr; 4739 if (srcmask) 4740 *srcmask = ntohl(sm->sin_addr.s_addr); 4741 } 4742 4743 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 4744 if (si && si->sin_addr.s_addr) 4745 ddst = si->sin_addr.s_addr; 4746 } 4747 4748 if (dst) *dst = ntohl(ddst); 4749 if (src) *src = ntohl(ssrc); 4750 } 4751 4752 /* 4753 * Set IP addresses. Must be called at splnet. 4754 * If an address is 0, leave it the way it is. 4755 */ 4756 static void 4757 sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr) 4758 { 4759 STDDCL; 4760 struct ifaddr *ifa; 4761 struct sockaddr_in *si; 4762 struct sockaddr_in *dest; 4763 4764 /* 4765 * Pick the first AF_INET address from the list, 4766 * aliases don't make any sense on a p2p link anyway. 4767 */ 4768 4769 si = 0; 4770 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4771 { 4772 if (ifa->ifa_addr->sa_family == AF_INET) 4773 { 4774 si = (struct sockaddr_in *)ifa->ifa_addr; 4775 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4776 if (si) 4777 break; 4778 } 4779 } 4780 4781 if (ifa && si) 4782 { 4783 int error; 4784 struct sockaddr_in new_sin = *si; 4785 struct sockaddr_in new_dst = *dest; 4786 4787 /* 4788 * Scrub old routes now instead of calling in_ifinit with 4789 * scrub=1, because we may change the dstaddr 4790 * before the call to in_ifinit. 4791 */ 4792 in_ifscrub(ifp, ifatoia(ifa)); 4793 4794 if (myaddr != 0) 4795 new_sin.sin_addr.s_addr = htonl(myaddr); 4796 if (hisaddr != 0) { 4797 new_dst.sin_addr.s_addr = htonl(hisaddr); 4798 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) { 4799 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 4800 *dest = new_dst; /* fix dstaddr in place */ 4801 } 4802 } 4803 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4804 if(debug && error) 4805 { 4806 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addrs: in_ifinit " 4807 " failed, error=%d\n", SPP_ARGS(ifp), error); 4808 } 4809 } 4810 } 4811 4812 /* 4813 * Clear IP addresses. Must be called at splnet. 4814 */ 4815 static void 4816 sppp_clear_ip_addrs(struct sppp *sp) 4817 { 4818 struct ifnet *ifp = &sp->pp_if; 4819 struct ifaddr *ifa; 4820 struct sockaddr_in *si; 4821 struct sockaddr_in *dest; 4822 4823 u_int32_t remote; 4824 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4825 remote = sp->ipcp.saved_hisaddr; 4826 else 4827 sppp_get_ip_addrs(sp, 0, &remote, 0); 4828 4829 /* 4830 * Pick the first AF_INET address from the list, 4831 * aliases don't make any sense on a p2p link anyway. 4832 */ 4833 4834 si = 0; 4835 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4836 { 4837 if (ifa->ifa_addr->sa_family == AF_INET) 4838 { 4839 si = (struct sockaddr_in *)ifa->ifa_addr; 4840 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4841 if (si) 4842 break; 4843 } 4844 } 4845 4846 if (ifa && si) 4847 { 4848 struct sockaddr_in new_sin = *si; 4849 4850 in_ifscrub(ifp, ifatoia(ifa)); 4851 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 4852 new_sin.sin_addr.s_addr = 0; 4853 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4854 /* replace peer addr in place */ 4855 dest->sin_addr.s_addr = sp->ipcp.saved_hisaddr; 4856 in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4857 } 4858 } 4859 4860 #ifdef INET6 4861 /* 4862 * Get both IPv6 addresses. 4863 */ 4864 static void 4865 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 4866 struct in6_addr *srcmask) 4867 { 4868 struct ifnet *ifp = &sp->pp_if; 4869 struct ifaddr *ifa; 4870 struct sockaddr_in6 *si, *sm; 4871 struct in6_addr ssrc, ddst; 4872 4873 sm = NULL; 4874 memset(&ssrc, 0, sizeof(ssrc)); 4875 memset(&ddst, 0, sizeof(ddst)); 4876 /* 4877 * Pick the first link-local AF_INET6 address from the list, 4878 * aliases don't make any sense on a p2p link anyway. 4879 */ 4880 si = 0; 4881 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4882 if (ifa->ifa_addr->sa_family == AF_INET6) { 4883 si = (struct sockaddr_in6 *)ifa->ifa_addr; 4884 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 4885 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) 4886 break; 4887 } 4888 if (ifa) { 4889 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 4890 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc)); 4891 if (srcmask) { 4892 bcopy(&sm->sin6_addr, srcmask, 4893 sizeof(*srcmask)); 4894 } 4895 } 4896 4897 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 4898 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 4899 bcopy(&si->sin6_addr, &ddst, sizeof(ddst)); 4900 } 4901 4902 if (dst) 4903 bcopy(&ddst, dst, sizeof(*dst)); 4904 if (src) 4905 bcopy(&ssrc, src, sizeof(*src)); 4906 } 4907 4908 #ifdef IPV6CP_MYIFID_DYN 4909 /* 4910 * Generate random ifid. 4911 */ 4912 static void 4913 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 4914 { 4915 /* TBD */ 4916 } 4917 4918 /* 4919 * Set my IPv6 address. Must be called at splnet. 4920 */ 4921 static void 4922 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 4923 { 4924 STDDCL; 4925 struct ifaddr *ifa; 4926 struct sockaddr_in6 *sin6; 4927 4928 /* 4929 * Pick the first link-local AF_INET6 address from the list, 4930 * aliases don't make any sense on a p2p link anyway. 4931 */ 4932 4933 sin6 = NULL; 4934 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4935 { 4936 if (ifa->ifa_addr->sa_family == AF_INET6) 4937 { 4938 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 4939 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 4940 break; 4941 } 4942 } 4943 4944 if (ifa && sin6) 4945 { 4946 int error; 4947 struct sockaddr_in6 new_sin6 = *sin6; 4948 4949 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr)); 4950 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 4951 if (debug && error) 4952 { 4953 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit " 4954 " failed, error=%d\n", SPP_ARGS(ifp), error); 4955 } 4956 } 4957 } 4958 #endif 4959 4960 /* 4961 * Suggest a candidate address to be used by peer. 4962 */ 4963 static void 4964 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 4965 { 4966 struct in6_addr myaddr; 4967 struct timeval tv; 4968 4969 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4970 4971 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 4972 microtime(&tv); 4973 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 4974 myaddr.s6_addr[14] ^= 0xff; 4975 myaddr.s6_addr[15] ^= 0xff; 4976 } else { 4977 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 4978 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 4979 } 4980 if (suggest) 4981 bcopy(&myaddr, suggest, sizeof(myaddr)); 4982 } 4983 #endif /*INET6*/ 4984 4985 /* 4986 * Process ioctl requests specific to the PPP interface. 4987 * Permissions have already been checked. 4988 */ 4989 static int 4990 sppp_params(struct sppp *sp, int cmd, void *data) 4991 { 4992 switch (cmd) { 4993 case SPPPGETAUTHCFG: 4994 { 4995 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 4996 int error; 4997 size_t len; 4998 4999 cfg->myauthflags = sp->myauth.flags; 5000 cfg->hisauthflags = sp->hisauth.flags; 5001 strncpy(cfg->ifname, sp->pp_if.if_xname, IFNAMSIZ); 5002 cfg->hisauth = 0; 5003 if (sp->hisauth.proto) 5004 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5005 cfg->myauth = 0; 5006 if (sp->myauth.proto) 5007 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5008 if (cfg->myname_length == 0) { 5009 if (sp->myauth.name != NULL) 5010 cfg->myname_length = sp->myauth.name_len + 1; 5011 } else { 5012 if (sp->myauth.name == NULL) { 5013 cfg->myname_length = 0; 5014 } else { 5015 len = sp->myauth.name_len + 1; 5016 if (cfg->myname_length < len) 5017 return (ENAMETOOLONG); 5018 error = copyout(sp->myauth.name, cfg->myname, len); 5019 if (error) return error; 5020 } 5021 } 5022 if (cfg->hisname_length == 0) { 5023 if(sp->hisauth.name != NULL) 5024 cfg->hisname_length = sp->hisauth.name_len + 1; 5025 } else { 5026 if (sp->hisauth.name == NULL) { 5027 cfg->hisname_length = 0; 5028 } else { 5029 len = sp->hisauth.name_len + 1; 5030 if (cfg->hisname_length < len) 5031 return (ENAMETOOLONG); 5032 error = copyout(sp->hisauth.name, cfg->hisname, len); 5033 if (error) return error; 5034 } 5035 } 5036 } 5037 break; 5038 case SPPPSETAUTHCFG: 5039 { 5040 struct spppauthcfg *cfg = (struct spppauthcfg*)data; 5041 int error; 5042 5043 if (sp->myauth.name) { 5044 free(sp->myauth.name, M_DEVBUF); 5045 sp->myauth.name = NULL; 5046 } 5047 if (sp->myauth.secret) { 5048 free(sp->myauth.secret, M_DEVBUF); 5049 sp->myauth.secret = NULL; 5050 } 5051 if (sp->hisauth.name) { 5052 free(sp->hisauth.name, M_DEVBUF); 5053 sp->hisauth.name = NULL; 5054 } 5055 if (sp->hisauth.secret) { 5056 free(sp->hisauth.secret, M_DEVBUF); 5057 sp->hisauth.secret = NULL; 5058 } 5059 5060 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5061 if (cfg->hisname_length >= MCLBYTES) 5062 return (ENAMETOOLONG); 5063 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5064 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5065 if (error) { 5066 free(sp->hisauth.name, M_DEVBUF); 5067 sp->hisauth.name = NULL; 5068 return error; 5069 } 5070 sp->hisauth.name_len = cfg->hisname_length - 1; 5071 sp->hisauth.name[sp->hisauth.name_len] = 0; 5072 } 5073 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5074 if (cfg->hissecret_length >= MCLBYTES) 5075 return (ENAMETOOLONG); 5076 sp->hisauth.secret = malloc(cfg->hissecret_length, M_DEVBUF, M_WAITOK); 5077 error = copyin(cfg->hissecret, sp->hisauth.secret, cfg->hissecret_length); 5078 if (error) { 5079 free(sp->hisauth.secret, M_DEVBUF); 5080 sp->hisauth.secret = NULL; 5081 return error; 5082 } 5083 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5084 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5085 } 5086 if (cfg->myname != NULL && cfg->myname_length > 0) { 5087 if (cfg->myname_length >= MCLBYTES) 5088 return (ENAMETOOLONG); 5089 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5090 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5091 if (error) { 5092 free(sp->myauth.name, M_DEVBUF); 5093 sp->myauth.name = NULL; 5094 return error; 5095 } 5096 sp->myauth.name_len = cfg->myname_length - 1; 5097 sp->myauth.name[sp->myauth.name_len] = 0; 5098 } 5099 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5100 if (cfg->mysecret_length >= MCLBYTES) 5101 return (ENAMETOOLONG); 5102 sp->myauth.secret = malloc(cfg->mysecret_length, M_DEVBUF, M_WAITOK); 5103 error = copyin(cfg->mysecret, sp->myauth.secret, cfg->mysecret_length); 5104 if (error) { 5105 free(sp->myauth.secret, M_DEVBUF); 5106 sp->myauth.secret = NULL; 5107 return error; 5108 } 5109 sp->myauth.secret_len = cfg->mysecret_length - 1; 5110 sp->myauth.secret[sp->myauth.secret_len] = 0; 5111 } 5112 sp->myauth.flags = cfg->myauthflags; 5113 if (cfg->myauth) 5114 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5115 sp->hisauth.flags = cfg->hisauthflags; 5116 if (cfg->hisauth) 5117 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5118 sp->pp_auth_failures = 0; 5119 if (sp->hisauth.proto != 0) 5120 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 5121 else 5122 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 5123 } 5124 break; 5125 case SPPPGETLCPCFG: 5126 { 5127 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5128 lcp->lcp_timeout = sp->lcp.timeout; 5129 } 5130 break; 5131 case SPPPSETLCPCFG: 5132 { 5133 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5134 sp->lcp.timeout = lcp->lcp_timeout; 5135 } 5136 break; 5137 case SPPPGETSTATUS: 5138 { 5139 struct spppstatus *status = (struct spppstatus *)data; 5140 status->phase = sp->pp_phase; 5141 } 5142 break; 5143 case SPPPGETIDLETO: 5144 { 5145 struct spppidletimeout *to = (struct spppidletimeout *)data; 5146 to->idle_seconds = sp->pp_idle_timeout; 5147 } 5148 break; 5149 case SPPPSETIDLETO: 5150 { 5151 struct spppidletimeout *to = (struct spppidletimeout *)data; 5152 sp->pp_idle_timeout = to->idle_seconds; 5153 } 5154 break; 5155 case SPPPSETAUTHFAILURE: 5156 { 5157 struct spppauthfailuresettings *afsettings = (struct spppauthfailuresettings *)data; 5158 sp->pp_max_auth_fail = afsettings->max_failures; 5159 sp->pp_auth_failures = 0; 5160 } 5161 break; 5162 case SPPPGETAUTHFAILURES: 5163 { 5164 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5165 stats->auth_failures = sp->pp_auth_failures; 5166 stats->max_failures = sp->pp_max_auth_fail; 5167 } 5168 break; 5169 case SPPPSETDNSOPTS: 5170 { 5171 struct spppdnssettings *req = (struct spppdnssettings*)data; 5172 sp->query_dns = req->query_dns & 3; 5173 } 5174 break; 5175 case SPPPGETDNSOPTS: 5176 { 5177 struct spppdnssettings *req = (struct spppdnssettings*)data; 5178 req->query_dns = sp->query_dns; 5179 } 5180 break; 5181 case SPPPGETDNSADDRS: 5182 { 5183 struct spppdnsaddrs *addrs = (struct spppdnsaddrs*)data; 5184 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5185 } 5186 break; 5187 default: 5188 return (EINVAL); 5189 } 5190 5191 return (0); 5192 } 5193 5194 static void 5195 sppp_phase_network(struct sppp *sp) 5196 { 5197 STDDCL; 5198 int i; 5199 u_int32_t mask; 5200 5201 sp->pp_phase = SPPP_PHASE_NETWORK; 5202 5203 if(debug) 5204 { 5205 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 5206 sppp_phase_name(sp->pp_phase)); 5207 } 5208 5209 /* Notify NCPs now. */ 5210 for (i = 0; i < IDX_COUNT; i++) 5211 if ((cps[i])->flags & CP_NCP) 5212 (cps[i])->Open(sp); 5213 5214 /* Send Up events to all NCPs. */ 5215 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5216 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) 5217 (cps[i])->Up(sp); 5218 5219 /* if no NCP is starting, all this was in vain, close down */ 5220 sppp_lcp_check_and_close(sp); 5221 } 5222 5223 5224 static const char * 5225 sppp_cp_type_name(u_char type) 5226 { 5227 static char buf[12]; 5228 switch (type) { 5229 case CONF_REQ: return "conf-req"; 5230 case CONF_ACK: return "conf-ack"; 5231 case CONF_NAK: return "conf-nak"; 5232 case CONF_REJ: return "conf-rej"; 5233 case TERM_REQ: return "term-req"; 5234 case TERM_ACK: return "term-ack"; 5235 case CODE_REJ: return "code-rej"; 5236 case PROTO_REJ: return "proto-rej"; 5237 case ECHO_REQ: return "echo-req"; 5238 case ECHO_REPLY: return "echo-reply"; 5239 case DISC_REQ: return "discard-req"; 5240 } 5241 sprintf (buf, "0x%x", type); 5242 return buf; 5243 } 5244 5245 static const char * 5246 sppp_auth_type_name(u_short proto, u_char type) 5247 { 5248 static char buf[12]; 5249 switch (proto) { 5250 case PPP_CHAP: 5251 switch (type) { 5252 case CHAP_CHALLENGE: return "challenge"; 5253 case CHAP_RESPONSE: return "response"; 5254 case CHAP_SUCCESS: return "success"; 5255 case CHAP_FAILURE: return "failure"; 5256 } 5257 case PPP_PAP: 5258 switch (type) { 5259 case PAP_REQ: return "req"; 5260 case PAP_ACK: return "ack"; 5261 case PAP_NAK: return "nak"; 5262 } 5263 } 5264 sprintf (buf, "0x%x", type); 5265 return buf; 5266 } 5267 5268 static const char * 5269 sppp_lcp_opt_name(u_char opt) 5270 { 5271 static char buf[12]; 5272 switch (opt) { 5273 case LCP_OPT_MRU: return "mru"; 5274 case LCP_OPT_ASYNC_MAP: return "async-map"; 5275 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 5276 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 5277 case LCP_OPT_MAGIC: return "magic"; 5278 case LCP_OPT_PROTO_COMP: return "proto-comp"; 5279 case LCP_OPT_ADDR_COMP: return "addr-comp"; 5280 } 5281 sprintf (buf, "0x%x", opt); 5282 return buf; 5283 } 5284 5285 static const char * 5286 sppp_ipcp_opt_name(u_char opt) 5287 { 5288 static char buf[12]; 5289 switch (opt) { 5290 case IPCP_OPT_ADDRESSES: return "addresses"; 5291 case IPCP_OPT_COMPRESSION: return "compression"; 5292 case IPCP_OPT_ADDRESS: return "address"; 5293 } 5294 sprintf (buf, "0x%x", opt); 5295 return buf; 5296 } 5297 5298 #ifdef INET6 5299 static const char * 5300 sppp_ipv6cp_opt_name(u_char opt) 5301 { 5302 static char buf[12]; 5303 switch (opt) { 5304 case IPV6CP_OPT_IFID: return "ifid"; 5305 case IPV6CP_OPT_COMPRESSION: return "compression"; 5306 } 5307 sprintf (buf, "0x%x", opt); 5308 return buf; 5309 } 5310 #endif 5311 5312 static const char * 5313 sppp_state_name(int state) 5314 { 5315 switch (state) { 5316 case STATE_INITIAL: return "initial"; 5317 case STATE_STARTING: return "starting"; 5318 case STATE_CLOSED: return "closed"; 5319 case STATE_STOPPED: return "stopped"; 5320 case STATE_CLOSING: return "closing"; 5321 case STATE_STOPPING: return "stopping"; 5322 case STATE_REQ_SENT: return "req-sent"; 5323 case STATE_ACK_RCVD: return "ack-rcvd"; 5324 case STATE_ACK_SENT: return "ack-sent"; 5325 case STATE_OPENED: return "opened"; 5326 } 5327 return "illegal"; 5328 } 5329 5330 static const char * 5331 sppp_phase_name(int phase) 5332 { 5333 switch (phase) { 5334 case SPPP_PHASE_DEAD: return "dead"; 5335 case SPPP_PHASE_ESTABLISH: return "establish"; 5336 case SPPP_PHASE_TERMINATE: return "terminate"; 5337 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 5338 case SPPP_PHASE_NETWORK: return "network"; 5339 } 5340 return "illegal"; 5341 } 5342 5343 static const char * 5344 sppp_proto_name(u_short proto) 5345 { 5346 static char buf[12]; 5347 switch (proto) { 5348 case PPP_LCP: return "lcp"; 5349 case PPP_IPCP: return "ipcp"; 5350 case PPP_PAP: return "pap"; 5351 case PPP_CHAP: return "chap"; 5352 case PPP_IPV6CP: return "ipv6cp"; 5353 } 5354 sprintf(buf, "0x%x", (unsigned)proto); 5355 return buf; 5356 } 5357 5358 static void 5359 sppp_print_bytes(const u_char *p, u_short len) 5360 { 5361 addlog(" %02x", *p++); 5362 while (--len > 0) 5363 addlog("-%02x", *p++); 5364 } 5365 5366 static void 5367 sppp_print_string(const char *p, u_short len) 5368 { 5369 u_char c; 5370 5371 while (len-- > 0) { 5372 c = *p++; 5373 /* 5374 * Print only ASCII chars directly. RFC 1994 recommends 5375 * using only them, but we don't rely on it. */ 5376 if (c < ' ' || c > '~') 5377 addlog("\\x%x", c); 5378 else 5379 addlog("%c", c); 5380 } 5381 } 5382 5383 static const char * 5384 sppp_dotted_quad(u_int32_t addr) 5385 { 5386 static char s[16]; 5387 sprintf(s, "%d.%d.%d.%d", 5388 (int)((addr >> 24) & 0xff), 5389 (int)((addr >> 16) & 0xff), 5390 (int)((addr >> 8) & 0xff), 5391 (int)(addr & 0xff)); 5392 return s; 5393 } 5394 5395 /* a dummy, used to drop uninteresting events */ 5396 static void 5397 sppp_null(struct sppp *unused) 5398 { 5399 /* do just nothing */ 5400 } 5401 /* 5402 * This file is large. Tell emacs to highlight it nevertheless. 5403 * 5404 * Local Variables: 5405 * hilit-auto-highlight-maxout: 120000 5406 * End: 5407 */ 5408
Indexes created Tue Oct 14 15:09:51 GMT 2025