if_spppsubr.c revision 1.10.4.2
1 /* $NetBSD: if_spppsubr.c,v 1.10.4.2 2001/07/29 19:51:36 he 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 #if defined(__NetBSD__) || (defined(__FreeBSD__) && __FreeBSD__ >= 3) 31 #include "opt_inet.h" 32 #include "opt_ipx.h" 33 #include "opt_iso.h" 34 #include "opt_ns.h" 35 #endif 36 37 #include <sys/param.h> 38 39 #include <sys/systm.h> 40 #include <sys/kernel.h> 41 #include <sys/sockio.h> 42 #include <sys/socket.h> 43 #include <sys/syslog.h> 44 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 45 #include <machine/random.h> 46 #endif 47 #include <sys/malloc.h> 48 #include <sys/mbuf.h> 49 50 #if defined (__OpenBSD__) 51 #include <sys/md5k.h> 52 #else 53 #include <sys/md5.h> 54 #endif 55 56 #include <net/if.h> 57 #include <net/netisr.h> 58 #include <net/if_types.h> 59 #include <net/route.h> 60 61 #include <machine/stdarg.h> 62 63 #ifdef INET 64 #include <netinet/in.h> 65 #include <netinet/in_systm.h> 66 #include <netinet/in_var.h> 67 #include <netinet/ip.h> 68 #include <netinet/tcp.h> 69 #if defined (__FreeBSD__) || defined (__OpenBSD__) 70 #include <netinet/if_ether.h> 71 #else 72 #include <net/ethertypes.h> 73 #endif 74 #else 75 #error Huh? sppp without INET? 76 #endif 77 78 #ifdef IPX 79 #include <netipx/ipx.h> 80 #include <netipx/ipx_if.h> 81 #endif 82 83 #ifdef NS 84 #include <netns/ns.h> 85 #include <netns/ns_if.h> 86 #endif 87 88 #ifdef ISO 89 #include <netiso/argo_debug.h> 90 #include <netiso/iso.h> 91 #include <netiso/iso_var.h> 92 #include <netiso/iso_snpac.h> 93 #endif 94 95 #if defined(__FreeBSD__) || defined(__NetBSD__) 96 #include <net/if_sppp.h> 97 #else 98 #include <i4b/sppp/if_sppp.h> 99 #endif 100 #if defined(__NetBSD__) || defined (__OpenBSD__) 101 #include <machine/cpu.h> /* XXX for softnet */ 102 #endif 103 104 #define MAXALIVECNT 3 /* max. alive packets */ 105 106 /* 107 * Interface flags that can be set in an ifconfig command. 108 * 109 * Setting link0 will make the link passive, i.e. it will be marked 110 * as being administrative openable, but won't be opened to begin 111 * with. Incoming calls will be answered, or subsequent calls with 112 * -link1 will cause the administrative open of the LCP layer. 113 * 114 * Setting link1 will cause the link to auto-dial only as packets 115 * arrive to be sent. 116 * 117 * Setting IFF_DEBUG will syslog the option negotiation and state 118 * transitions at level kern.debug. Note: all logs consistently look 119 * like 120 * 121 * <if-name><unit>: <proto-name> <additional info...> 122 * 123 * with <if-name><unit> being something like "bppp0", and <proto-name> 124 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc. 125 */ 126 127 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ 128 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */ 129 130 #define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */ 131 #define PPP_UI 0x03 /* Unnumbered Information */ 132 #define PPP_IP 0x0021 /* Internet Protocol */ 133 #define PPP_ISO 0x0023 /* ISO OSI Protocol */ 134 #define PPP_XNS 0x0025 /* Xerox NS Protocol */ 135 #define PPP_IPX 0x002b /* Novell IPX Protocol */ 136 #define PPP_IPV6 0x0057 /* Internet Protocol version 6 */ 137 #define PPP_LCP 0xc021 /* Link Control Protocol */ 138 #define PPP_PAP 0xc023 /* Password Authentication Protocol */ 139 #define PPP_CHAP 0xc223 /* Challenge-Handshake Auth Protocol */ 140 #define PPP_IPCP 0x8021 /* Internet Protocol Control Protocol */ 141 #define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */ 142 143 #define CONF_REQ 1 /* PPP configure request */ 144 #define CONF_ACK 2 /* PPP configure acknowledge */ 145 #define CONF_NAK 3 /* PPP configure negative ack */ 146 #define CONF_REJ 4 /* PPP configure reject */ 147 #define TERM_REQ 5 /* PPP terminate request */ 148 #define TERM_ACK 6 /* PPP terminate acknowledge */ 149 #define CODE_REJ 7 /* PPP code reject */ 150 #define PROTO_REJ 8 /* PPP protocol reject */ 151 #define ECHO_REQ 9 /* PPP echo request */ 152 #define ECHO_REPLY 10 /* PPP echo reply */ 153 #define DISC_REQ 11 /* PPP discard request */ 154 155 #define LCP_OPT_MRU 1 /* maximum receive unit */ 156 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */ 157 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ 158 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ 159 #define LCP_OPT_MAGIC 5 /* magic number */ 160 #define LCP_OPT_RESERVED 6 /* reserved */ 161 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ 162 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ 163 164 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ 165 #define IPCP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ 166 #define IPCP_OPT_ADDRESS 3 /* local IP address */ 167 168 #define IPV6CP_OPT_IFID 1 /* interface identifier */ 169 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ 170 171 #define PAP_REQ 1 /* PAP name/password request */ 172 #define PAP_ACK 2 /* PAP acknowledge */ 173 #define PAP_NAK 3 /* PAP fail */ 174 175 #define CHAP_CHALLENGE 1 /* CHAP challenge request */ 176 #define CHAP_RESPONSE 2 /* CHAP challenge response */ 177 #define CHAP_SUCCESS 3 /* CHAP response ok */ 178 #define CHAP_FAILURE 4 /* CHAP response failed */ 179 180 #define CHAP_MD5 5 /* hash algorithm - MD5 */ 181 182 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */ 183 #define CISCO_UNICAST 0x0f /* Cisco unicast address */ 184 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ 185 #define CISCO_ADDR_REQ 0 /* Cisco address request */ 186 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */ 187 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ 188 189 /* states are named and numbered according to RFC 1661 */ 190 #define STATE_INITIAL 0 191 #define STATE_STARTING 1 192 #define STATE_CLOSED 2 193 #define STATE_STOPPED 3 194 #define STATE_CLOSING 4 195 #define STATE_STOPPING 5 196 #define STATE_REQ_SENT 6 197 #define STATE_ACK_RCVD 7 198 #define STATE_ACK_SENT 8 199 #define STATE_OPENED 9 200 201 struct ppp_header { 202 u_char address; 203 u_char control; 204 u_short protocol; 205 } __attribute__((__packed__)); 206 #define PPP_HEADER_LEN sizeof (struct ppp_header) 207 208 struct lcp_header { 209 u_char type; 210 u_char ident; 211 u_short len; 212 } __attribute__((__packed__)); 213 #define LCP_HEADER_LEN sizeof (struct lcp_header) 214 215 struct cisco_packet { 216 u_long type; 217 u_long par1; 218 u_long par2; 219 u_short rel; 220 u_short time0; 221 u_short time1; 222 } __attribute__((__packed__)); 223 #define CISCO_PACKET_LEN 18 224 225 /* 226 * We follow the spelling and capitalization of RFC 1661 here, to make 227 * it easier comparing with the standard. Please refer to this RFC in 228 * case you can't make sense out of these abbreviation; it will also 229 * explain the semantics related to the various events and actions. 230 */ 231 struct cp { 232 u_short proto; /* PPP control protocol number */ 233 u_char protoidx; /* index into state table in struct sppp */ 234 u_char flags; 235 #define CP_LCP 0x01 /* this is the LCP */ 236 #define CP_AUTH 0x02 /* this is an authentication protocol */ 237 #define CP_NCP 0x04 /* this is a NCP */ 238 #define CP_QUAL 0x08 /* this is a quality reporting protocol */ 239 const char *name; /* name of this control protocol */ 240 /* event handlers */ 241 void (*Up)(struct sppp *sp); 242 void (*Down)(struct sppp *sp); 243 void (*Open)(struct sppp *sp); 244 void (*Close)(struct sppp *sp); 245 void (*TO)(void *sp); 246 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len); 247 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len); 248 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len); 249 /* actions */ 250 void (*tlu)(struct sppp *sp); 251 void (*tld)(struct sppp *sp); 252 void (*tls)(struct sppp *sp); 253 void (*tlf)(struct sppp *sp); 254 void (*scr)(struct sppp *sp); 255 }; 256 257 static struct sppp *spppq; 258 #if defined(__NetBSD__) 259 static struct callout keepalive_ch; 260 #endif 261 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 262 static struct callout_handle keepalive_ch; 263 #endif 264 265 #ifdef __FreeBSD__ 266 #define SPP_FMT "%s%d: " 267 #define SPP_ARGS(ifp) (ifp)->if_name, (ifp)->if_unit 268 #else 269 #define SPP_FMT "%s: " 270 #define SPP_ARGS(ifp) (ifp)->if_xname 271 #endif 272 273 /* 274 * The following disgusting hack gets around the problem that IP TOS 275 * can't be set yet. We want to put "interactive" traffic on a high 276 * priority queue. To decide if traffic is interactive, we check that 277 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 278 * 279 * XXX is this really still necessary? - joerg - 280 */ 281 static u_short interactive_ports[8] = { 282 0, 513, 0, 0, 283 0, 21, 0, 23, 284 }; 285 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 286 287 /* almost every function needs these */ 288 #define STDDCL \ 289 struct ifnet *ifp = &sp->pp_if; \ 290 int debug = ifp->if_flags & IFF_DEBUG 291 292 static int sppp_output(struct ifnet *ifp, struct mbuf *m, 293 struct sockaddr *dst, struct rtentry *rt); 294 295 static void sppp_cisco_send(struct sppp *sp, int type, long par1, long par2); 296 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m); 297 298 static void sppp_cp_input(const struct cp *cp, struct sppp *sp, 299 struct mbuf *m); 300 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 301 u_char ident, u_short len, void *data); 302 /* static void sppp_cp_timeout(void *arg); */ 303 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp, 304 int newstate); 305 static void sppp_auth_send(const struct cp *cp, 306 struct sppp *sp, unsigned int type, unsigned int id, 307 ...); 308 309 static void sppp_up_event(const struct cp *cp, struct sppp *sp); 310 static void sppp_down_event(const struct cp *cp, struct sppp *sp); 311 static void sppp_open_event(const struct cp *cp, struct sppp *sp); 312 static void sppp_close_event(const struct cp *cp, struct sppp *sp); 313 static void sppp_to_event(const struct cp *cp, struct sppp *sp); 314 315 static void sppp_null(struct sppp *sp); 316 317 static void sppp_lcp_init(struct sppp *sp); 318 static void sppp_lcp_up(struct sppp *sp); 319 static void sppp_lcp_down(struct sppp *sp); 320 static void sppp_lcp_open(struct sppp *sp); 321 static void sppp_lcp_close(struct sppp *sp); 322 static void sppp_lcp_TO(void *sp); 323 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 324 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 325 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 326 static void sppp_lcp_tlu(struct sppp *sp); 327 static void sppp_lcp_tld(struct sppp *sp); 328 static void sppp_lcp_tls(struct sppp *sp); 329 static void sppp_lcp_tlf(struct sppp *sp); 330 static void sppp_lcp_scr(struct sppp *sp); 331 static void sppp_lcp_check_and_close(struct sppp *sp); 332 static int sppp_ncp_check(struct sppp *sp); 333 334 static void sppp_ipcp_init(struct sppp *sp); 335 static void sppp_ipcp_up(struct sppp *sp); 336 static void sppp_ipcp_down(struct sppp *sp); 337 static void sppp_ipcp_open(struct sppp *sp); 338 static void sppp_ipcp_close(struct sppp *sp); 339 static void sppp_ipcp_TO(void *sp); 340 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 341 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 342 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 343 static void sppp_ipcp_tlu(struct sppp *sp); 344 static void sppp_ipcp_tld(struct sppp *sp); 345 static void sppp_ipcp_tls(struct sppp *sp); 346 static void sppp_ipcp_tlf(struct sppp *sp); 347 static void sppp_ipcp_scr(struct sppp *sp); 348 349 static void sppp_ipv6cp_init(struct sppp *sp); 350 static void sppp_ipv6cp_up(struct sppp *sp); 351 static void sppp_ipv6cp_down(struct sppp *sp); 352 static void sppp_ipv6cp_open(struct sppp *sp); 353 static void sppp_ipv6cp_close(struct sppp *sp); 354 static void sppp_ipv6cp_TO(void *sp); 355 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len); 356 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 357 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 358 static void sppp_ipv6cp_tlu(struct sppp *sp); 359 static void sppp_ipv6cp_tld(struct sppp *sp); 360 static void sppp_ipv6cp_tls(struct sppp *sp); 361 static void sppp_ipv6cp_tlf(struct sppp *sp); 362 static void sppp_ipv6cp_scr(struct sppp *sp); 363 364 static void sppp_pap_input(struct sppp *sp, struct mbuf *m); 365 static void sppp_pap_init(struct sppp *sp); 366 static void sppp_pap_open(struct sppp *sp); 367 static void sppp_pap_close(struct sppp *sp); 368 static void sppp_pap_TO(void *sp); 369 static void sppp_pap_my_TO(void *sp); 370 static void sppp_pap_tlu(struct sppp *sp); 371 static void sppp_pap_tld(struct sppp *sp); 372 static void sppp_pap_scr(struct sppp *sp); 373 374 static void sppp_chap_input(struct sppp *sp, struct mbuf *m); 375 static void sppp_chap_init(struct sppp *sp); 376 static void sppp_chap_open(struct sppp *sp); 377 static void sppp_chap_close(struct sppp *sp); 378 static void sppp_chap_TO(void *sp); 379 static void sppp_chap_tlu(struct sppp *sp); 380 static void sppp_chap_tld(struct sppp *sp); 381 static void sppp_chap_scr(struct sppp *sp); 382 383 static const char *sppp_auth_type_name(u_short proto, u_char type); 384 static const char *sppp_cp_type_name(u_char type); 385 static const char *sppp_dotted_quad(u_long addr); 386 static const char *sppp_ipcp_opt_name(u_char opt); 387 #ifdef INET6 388 static const char *sppp_ipv6cp_opt_name(u_char opt); 389 #endif 390 static const char *sppp_lcp_opt_name(u_char opt); 391 static const char *sppp_phase_name(enum ppp_phase phase); 392 static const char *sppp_proto_name(u_short proto); 393 static const char *sppp_state_name(int state); 394 static int sppp_params(struct sppp *sp, int cmd, void *data); 395 static int sppp_strnlen(u_char *p, int max); 396 static void sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst, 397 u_long *srcmask); 398 static void sppp_keepalive(void *dummy); 399 static void sppp_phase_network(struct sppp *sp); 400 static void sppp_print_bytes(const u_char *p, u_short len); 401 static void sppp_print_string(const char *p, u_short len); 402 static void sppp_qflush(struct ifqueue *ifq); 403 static void sppp_set_ip_addr(struct sppp *sp, u_long src); 404 #ifdef INET6 405 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, 406 struct in6_addr *dst, struct in6_addr *srcmask); 407 #ifdef IPV6CP_MYIFID_DYN 408 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src); 409 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src); 410 #endif 411 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src); 412 #endif 413 414 /* our control protocol descriptors */ 415 static const struct cp lcp = { 416 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 417 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close, 418 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak, 419 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf, 420 sppp_lcp_scr 421 }; 422 423 static const struct cp ipcp = { 424 PPP_IPCP, IDX_IPCP, CP_NCP, "ipcp", 425 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close, 426 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak, 427 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf, 428 sppp_ipcp_scr 429 }; 430 431 static const struct cp ipv6cp = { 432 PPP_IPV6CP, IDX_IPV6CP, 433 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 434 CP_NCP, 435 #else 436 0, 437 #endif 438 "ipv6cp", 439 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close, 440 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak, 441 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf, 442 sppp_ipv6cp_scr 443 }; 444 445 static const struct cp pap = { 446 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 447 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close, 448 sppp_pap_TO, 0, 0, 0, 449 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null, 450 sppp_pap_scr 451 }; 452 453 static const struct cp chap = { 454 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 455 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close, 456 sppp_chap_TO, 0, 0, 0, 457 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null, 458 sppp_chap_scr 459 }; 460 461 static const struct cp *cps[IDX_COUNT] = { 462 &lcp, /* IDX_LCP */ 463 &ipcp, /* IDX_IPCP */ 464 &ipv6cp, /* IDX_IPV6CP */ 465 &pap, /* IDX_PAP */ 466 &chap, /* IDX_CHAP */ 467 }; 468 469 470 /* 472 * Exported functions, comprising our interface to the lower layer. 473 */ 474 475 /* 476 * Process the received packet. 477 */ 478 void 479 sppp_input(struct ifnet *ifp, struct mbuf *m) 480 { 481 struct ppp_header *h; 482 struct ifqueue *inq = 0; 483 int s; 484 struct sppp *sp = (struct sppp *)ifp; 485 int debug = ifp->if_flags & IFF_DEBUG; 486 487 if (ifp->if_flags & IFF_UP) 488 /* Count received bytes, add FCS and one flag */ 489 ifp->if_ibytes += m->m_pkthdr.len + 3; 490 491 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 492 /* Too small packet, drop it. */ 493 if (debug) 494 log(LOG_DEBUG, 495 SPP_FMT "input packet is too small, %d bytes\n", 496 SPP_ARGS(ifp), m->m_pkthdr.len); 497 drop: 498 ++ifp->if_ierrors; 499 ++ifp->if_iqdrops; 500 m_freem (m); 501 return; 502 } 503 504 /* Get PPP header. */ 505 h = mtod (m, struct ppp_header*); 506 m_adj (m, PPP_HEADER_LEN); 507 508 switch (h->address) { 509 case PPP_ALLSTATIONS: 510 if (h->control != PPP_UI) 511 goto invalid; 512 if (sp->pp_flags & PP_CISCO) { 513 if (debug) 514 log(LOG_DEBUG, 515 SPP_FMT "PPP packet in Cisco mode " 516 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 517 SPP_ARGS(ifp), 518 h->address, h->control, ntohs(h->protocol)); 519 goto drop; 520 } 521 switch (ntohs (h->protocol)) { 522 default: 523 if (sp->state[IDX_LCP] == STATE_OPENED) 524 sppp_cp_send (sp, PPP_LCP, PROTO_REJ, 525 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2, 526 &h->protocol); 527 if (debug) 528 log(LOG_DEBUG, 529 SPP_FMT "invalid input protocol " 530 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 531 SPP_ARGS(ifp), 532 h->address, h->control, ntohs(h->protocol)); 533 ++ifp->if_noproto; 534 goto drop; 535 case PPP_LCP: 536 sppp_cp_input(&lcp, sp, m); 537 m_freem (m); 538 return; 539 case PPP_PAP: 540 if (sp->pp_phase >= PHASE_AUTHENTICATE) 541 sppp_pap_input(sp, m); 542 m_freem (m); 543 return; 544 case PPP_CHAP: 545 if (sp->pp_phase >= PHASE_AUTHENTICATE) 546 sppp_chap_input(sp, m); 547 m_freem (m); 548 return; 549 #ifdef INET 550 case PPP_IPCP: 551 if (sp->pp_phase == PHASE_NETWORK) 552 sppp_cp_input(&ipcp, sp, m); 553 m_freem (m); 554 return; 555 case PPP_IP: 556 if (sp->state[IDX_IPCP] == STATE_OPENED) { 557 schednetisr (NETISR_IP); 558 inq = &ipintrq; 559 } 560 break; 561 #endif 562 #ifdef INET6 563 case PPP_IPV6CP: 564 if (sp->pp_phase == PHASE_NETWORK) 565 sppp_cp_input(&ipv6cp, sp, m); 566 m_freem (m); 567 return; 568 569 case PPP_IPV6: 570 if (sp->state[IDX_IPV6CP] == STATE_OPENED) { 571 schednetisr (NETISR_IPV6); 572 inq = &ip6intrq; 573 } 574 break; 575 #endif 576 #ifdef IPX 577 case PPP_IPX: 578 /* IPX IPXCP not implemented yet */ 579 if (sp->pp_phase == PHASE_NETWORK) { 580 schednetisr (NETISR_IPX); 581 inq = &ipxintrq; 582 } 583 break; 584 #endif 585 #ifdef NS 586 case PPP_XNS: 587 /* XNS IDPCP not implemented yet */ 588 if (sp->pp_phase == PHASE_NETWORK) { 589 schednetisr (NETISR_NS); 590 inq = &nsintrq; 591 } 592 break; 593 #endif 594 #ifdef ISO 595 case PPP_ISO: 596 /* OSI NLCP not implemented yet */ 597 if (sp->pp_phase == PHASE_NETWORK) { 598 schednetisr (NETISR_ISO); 599 inq = &clnlintrq; 600 } 601 break; 602 #endif 603 } 604 break; 605 case CISCO_MULTICAST: 606 case CISCO_UNICAST: 607 /* Don't check the control field here (RFC 1547). */ 608 if (! (sp->pp_flags & PP_CISCO)) { 609 if (debug) 610 log(LOG_DEBUG, 611 SPP_FMT "Cisco packet in PPP mode " 612 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 613 SPP_ARGS(ifp), 614 h->address, h->control, ntohs(h->protocol)); 615 goto drop; 616 } 617 switch (ntohs (h->protocol)) { 618 default: 619 ++ifp->if_noproto; 620 goto invalid; 621 case CISCO_KEEPALIVE: 622 sppp_cisco_input ((struct sppp*) ifp, m); 623 m_freem (m); 624 return; 625 #ifdef INET 626 case ETHERTYPE_IP: 627 schednetisr (NETISR_IP); 628 inq = &ipintrq; 629 break; 630 #endif 631 #ifdef INET6 632 case ETHERTYPE_IPV6: 633 schednetisr (NETISR_IPV6); 634 inq = &ip6intrq; 635 break; 636 #endif 637 #ifdef IPX 638 case ETHERTYPE_IPX: 639 schednetisr (NETISR_IPX); 640 inq = &ipxintrq; 641 break; 642 #endif 643 #ifdef NS 644 case ETHERTYPE_NS: 645 schednetisr (NETISR_NS); 646 inq = &nsintrq; 647 break; 648 #endif 649 } 650 break; 651 default: /* Invalid PPP packet. */ 652 invalid: 653 if (debug) 654 log(LOG_DEBUG, 655 SPP_FMT "invalid input packet " 656 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 657 SPP_ARGS(ifp), 658 h->address, h->control, ntohs(h->protocol)); 659 goto drop; 660 } 661 662 if (! (ifp->if_flags & IFF_UP) || ! inq) 663 goto drop; 664 665 /* Check queue. */ 666 s = splimp(); 667 if (IF_QFULL (inq)) { 668 /* Queue overflow. */ 669 IF_DROP(inq); 670 splx(s); 671 if (debug) 672 log(LOG_DEBUG, SPP_FMT "protocol queue overflow\n", 673 SPP_ARGS(ifp)); 674 goto drop; 675 } 676 IF_ENQUEUE(inq, m); 677 splx(s); 678 } 679 680 /* 681 * Enqueue transmit packet. 682 */ 683 static int 684 sppp_output(struct ifnet *ifp, struct mbuf *m, 685 struct sockaddr *dst, struct rtentry *rt) 686 { 687 struct sppp *sp = (struct sppp*) ifp; 688 struct ppp_header *h; 689 struct ifqueue *ifq; 690 int s, rv = 0; 691 692 s = splimp(); 693 694 if ((ifp->if_flags & IFF_UP) == 0 || 695 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 696 m_freem (m); 697 splx (s); 698 return (ENETDOWN); 699 } 700 701 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 702 /* 703 * Interface is not yet running, but auto-dial. Need 704 * to start LCP for it. 705 */ 706 ifp->if_flags |= IFF_RUNNING; 707 splx(s); 708 lcp.Open(sp); 709 s = splimp(); 710 } 711 712 ifq = &ifp->if_snd; 713 714 #ifdef INET 715 if (dst->sa_family == AF_INET) 716 { 717 /* Check mbuf length here??? */ 718 struct ip *ip = mtod (m, struct ip*); 719 struct tcphdr *tcp = (struct tcphdr*) ((long*)ip + ip->ip_hl); 720 721 /* 722 * When using dynamic local IP address assignment by using 723 * 0.0.0.0 as a local address, the first TCP session will 724 * not connect because the local TCP checksum is computed 725 * using 0.0.0.0 which will later become our real IP address 726 * so the TCP checksum computed at the remote end will 727 * become invalid. So we 728 * - don't let packets with src ip addr 0 thru 729 * - we flag TCP packets with src ip 0 as an error 730 */ 731 732 if(ip->ip_src.s_addr == INADDR_ANY) /* -hm */ 733 { 734 m_freem(m); 735 splx(s); 736 if(ip->ip_p == IPPROTO_TCP) 737 return(EADDRNOTAVAIL); 738 else 739 return(0); 740 } 741 742 /* 743 * Put low delay, telnet, rlogin and ftp control packets 744 * in front of the queue. 745 */ 746 747 if (! IF_QFULL (&sp->pp_fastq) && 748 ((ip->ip_tos & IPTOS_LOWDELAY) || 749 ((ip->ip_p == IPPROTO_TCP && 750 m->m_len >= sizeof (struct ip) + sizeof (struct tcphdr) && 751 (INTERACTIVE (ntohs (tcp->th_sport)))) || 752 INTERACTIVE (ntohs (tcp->th_dport))))) 753 ifq = &sp->pp_fastq; 754 } 755 #endif 756 757 #ifdef INET6 758 if (dst->sa_family == AF_INET6) { 759 /* XXX do something tricky here? */ 760 } 761 #endif 762 763 /* 764 * Prepend general data packet PPP header. For now, IP only. 765 */ 766 M_PREPEND (m, PPP_HEADER_LEN, M_DONTWAIT); 767 if (! m) { 768 if (ifp->if_flags & IFF_DEBUG) 769 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 770 SPP_ARGS(ifp)); 771 ++ifp->if_oerrors; 772 splx (s); 773 return (ENOBUFS); 774 } 775 /* 776 * May want to check size of packet 777 * (albeit due to the implementation it's always enough) 778 */ 779 h = mtod (m, struct ppp_header*); 780 if (sp->pp_flags & PP_CISCO) { 781 h->address = CISCO_UNICAST; /* unicast address */ 782 h->control = 0; 783 } else { 784 h->address = PPP_ALLSTATIONS; /* broadcast address */ 785 h->control = PPP_UI; /* Unnumbered Info */ 786 } 787 788 switch (dst->sa_family) { 789 #ifdef INET 790 case AF_INET: /* Internet Protocol */ 791 if (sp->pp_flags & PP_CISCO) 792 h->protocol = htons (ETHERTYPE_IP); 793 else { 794 /* 795 * Don't choke with an ENETDOWN early. It's 796 * possible that we just started dialing out, 797 * so don't drop the packet immediately. If 798 * we notice that we run out of buffer space 799 * below, we will however remember that we are 800 * not ready to carry IP packets, and return 801 * ENETDOWN, as opposed to ENOBUFS. 802 */ 803 h->protocol = htons(PPP_IP); 804 if (sp->state[IDX_IPCP] != STATE_OPENED) 805 rv = ENETDOWN; 806 } 807 break; 808 #endif 809 #ifdef INET6 810 case AF_INET6: /* Internet Protocol version 6 */ 811 if (sp->pp_flags & PP_CISCO) 812 h->protocol = htons (ETHERTYPE_IPV6); 813 else { 814 /* 815 * Don't choke with an ENETDOWN early. It's 816 * possible that we just started dialing out, 817 * so don't drop the packet immediately. If 818 * we notice that we run out of buffer space 819 * below, we will however remember that we are 820 * not ready to carry IP packets, and return 821 * ENETDOWN, as opposed to ENOBUFS. 822 */ 823 h->protocol = htons(PPP_IPV6); 824 if (sp->state[IDX_IPV6CP] != STATE_OPENED) 825 rv = ENETDOWN; 826 } 827 break; 828 #endif 829 #ifdef NS 830 case AF_NS: /* Xerox NS Protocol */ 831 h->protocol = htons ((sp->pp_flags & PP_CISCO) ? 832 ETHERTYPE_NS : PPP_XNS); 833 break; 834 #endif 835 #ifdef IPX 836 case AF_IPX: /* Novell IPX Protocol */ 837 h->protocol = htons ((sp->pp_flags & PP_CISCO) ? 838 ETHERTYPE_IPX : PPP_IPX); 839 break; 840 #endif 841 #ifdef ISO 842 case AF_ISO: /* ISO OSI Protocol */ 843 if (sp->pp_flags & PP_CISCO) 844 goto nosupport; 845 h->protocol = htons (PPP_ISO); 846 break; 847 nosupport: 848 #endif 849 default: 850 m_freem (m); 851 ++ifp->if_oerrors; 852 splx (s); 853 return (EAFNOSUPPORT); 854 } 855 856 /* 857 * Queue message on interface, and start output if interface 858 * not yet active. 859 */ 860 if (IF_QFULL (ifq)) { 861 IF_DROP (&ifp->if_snd); 862 m_freem (m); 863 ++ifp->if_oerrors; 864 splx (s); 865 return (rv? rv: ENOBUFS); 866 } 867 IF_ENQUEUE (ifq, m); 868 if (! (ifp->if_flags & IFF_OACTIVE)) 869 (*ifp->if_start) (ifp); 870 871 /* 872 * Count output packets and bytes. 873 * The packet length includes header, FCS and 1 flag, 874 * according to RFC 1333. 875 */ 876 ifp->if_obytes += m->m_pkthdr.len + 3; 877 splx (s); 878 return (0); 879 } 880 881 void 882 sppp_attach(struct ifnet *ifp) 883 { 884 struct sppp *sp = (struct sppp*) ifp; 885 886 /* Initialize keepalive handler. */ 887 if (! spppq) { 888 #if defined(__NetBSD__) 889 callout_init(&keepalive_ch); 890 callout_reset(&keepalive_ch, hz * 10, sppp_keepalive, NULL); 891 #else 892 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 893 keepalive_ch = 894 #endif 895 timeout(sppp_keepalive, 0, hz * 10); 896 #endif /* __NetBSD__ */ 897 } 898 899 /* Insert new entry into the keepalive list. */ 900 sp->pp_next = spppq; 901 spppq = sp; 902 903 sp->pp_if.if_type = IFT_PPP; 904 sp->pp_if.if_output = sppp_output; 905 sp->pp_fastq.ifq_maxlen = 32; 906 sp->pp_cpq.ifq_maxlen = 20; 907 sp->pp_loopcnt = 0; 908 sp->pp_alivecnt = 0; 909 bzero(&sp->pp_seq[0], sizeof(sp->pp_seq)); 910 bzero(&sp->pp_rseq[0], sizeof(sp->pp_rseq)); 911 sp->pp_phase = PHASE_DEAD; 912 sp->pp_up = lcp.Up; 913 sp->pp_down = lcp.Down; 914 915 sppp_lcp_init(sp); 916 sppp_ipcp_init(sp); 917 sppp_ipv6cp_init(sp); 918 sppp_pap_init(sp); 919 sppp_chap_init(sp); 920 } 921 922 void 923 sppp_detach(struct ifnet *ifp) 924 { 925 struct sppp **q, *p, *sp = (struct sppp*) ifp; 926 int i; 927 928 /* Remove the entry from the keepalive list. */ 929 for (q = &spppq; (p = *q); q = &p->pp_next) 930 if (p == sp) { 931 *q = p->pp_next; 932 break; 933 } 934 935 /* Stop keepalive handler. */ 936 if (! spppq) { 937 #if defined(__NetBSD__) 938 callout_stop(&keepalive_ch); 939 #else 940 untimeout(sppp_keepalive, 0 941 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 942 ,keepalive_ch 943 #endif 944 ); 945 #endif /* __NetBSD__ */ 946 } 947 948 for (i = 0; i < IDX_COUNT; i++) { 949 #if defined(__NetBSD__) 950 callout_stop(&sp->ch[i]); 951 #else 952 untimeout((cps[i])->TO, (void *)sp 953 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 954 , sp->ch[i] 955 #endif 956 ); 957 #endif /* __NetBSD__ */ 958 } 959 #if defined(__NetBSD__) 960 callout_stop(&sp->pap_my_to_ch); 961 #else 962 untimeout(sppp_pap_my_TO, (void *)sp 963 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 964 , sp->pap_my_to_ch 965 #endif 966 ); 967 #endif /* __NetBSD__ */ 968 } 969 970 /* 971 * Flush the interface output queue. 972 */ 973 void 974 sppp_flush(struct ifnet *ifp) 975 { 976 struct sppp *sp = (struct sppp*) ifp; 977 978 sppp_qflush (&sp->pp_if.if_snd); 979 sppp_qflush (&sp->pp_fastq); 980 sppp_qflush (&sp->pp_cpq); 981 } 982 983 /* 984 * Check if the output queue is empty. 985 */ 986 int 987 sppp_isempty(struct ifnet *ifp) 988 { 989 struct sppp *sp = (struct sppp*) ifp; 990 int empty, s; 991 992 s = splimp(); 993 empty = !sp->pp_fastq.ifq_head && !sp->pp_cpq.ifq_head && 994 !sp->pp_if.if_snd.ifq_head; 995 splx(s); 996 return (empty); 997 } 998 999 /* 1000 * Get next packet to send. 1001 */ 1002 struct mbuf * 1003 sppp_dequeue(struct ifnet *ifp) 1004 { 1005 struct sppp *sp = (struct sppp*) ifp; 1006 struct mbuf *m; 1007 int s; 1008 1009 s = splimp(); 1010 /* 1011 * Process only the control protocol queue until we have at 1012 * least one NCP open. 1013 * 1014 * Do always serve all three queues in Cisco mode. 1015 */ 1016 IF_DEQUEUE(&sp->pp_cpq, m); 1017 if (m == NULL && 1018 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { 1019 IF_DEQUEUE(&sp->pp_fastq, m); 1020 if (m == NULL) 1021 IF_DEQUEUE (&sp->pp_if.if_snd, m); 1022 } 1023 splx(s); 1024 return m; 1025 } 1026 1027 /* 1028 * Pick the next packet, do not remove it from the queue. 1029 */ 1030 struct mbuf * 1031 sppp_pick(struct ifnet *ifp) 1032 { 1033 struct sppp *sp = (struct sppp*)ifp; 1034 struct mbuf *m; 1035 int s; 1036 1037 s= splimp (); 1038 1039 m = sp->pp_cpq.ifq_head; 1040 if (m == NULL && 1041 (sp->pp_phase == PHASE_NETWORK || 1042 (sp->pp_flags & PP_CISCO) != 0)) 1043 if ((m = sp->pp_fastq.ifq_head) == NULL) 1044 m = sp->pp_if.if_snd.ifq_head; 1045 splx (s); 1046 return (m); 1047 } 1048 1049 /* 1050 * Process an ioctl request. Called on low priority level. 1051 */ 1052 int 1053 #if defined(__FreeBSD_version) && __FreeBSD_version >= 300003 1054 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1055 #else 1056 sppp_ioctl(struct ifnet *ifp, int cmd, void *data) 1057 #endif 1058 { 1059 struct ifreq *ifr = (struct ifreq*) data; 1060 struct sppp *sp = (struct sppp*) ifp; 1061 int s, rv, going_up, going_down, newmode; 1062 1063 s = splimp(); 1064 rv = 0; 1065 switch (cmd) { 1066 case SIOCAIFADDR: 1067 case SIOCSIFDSTADDR: 1068 break; 1069 1070 case SIOCSIFADDR: 1071 if_up(ifp); 1072 /* fall through... */ 1073 1074 case SIOCSIFFLAGS: 1075 going_up = ifp->if_flags & IFF_UP && 1076 (ifp->if_flags & IFF_RUNNING) == 0; 1077 going_down = (ifp->if_flags & IFF_UP) == 0 && 1078 ifp->if_flags & IFF_RUNNING; 1079 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1080 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1081 /* sanity */ 1082 newmode = IFF_PASSIVE; 1083 ifp->if_flags &= ~IFF_AUTO; 1084 } 1085 1086 if (going_up || going_down) 1087 lcp.Close(sp); 1088 if (going_up && newmode == 0) { 1089 /* neither auto-dial nor passive */ 1090 ifp->if_flags |= IFF_RUNNING; 1091 if (!(sp->pp_flags & PP_CISCO)) 1092 lcp.Open(sp); 1093 } else if (going_down) { 1094 sppp_flush(ifp); 1095 ifp->if_flags &= ~IFF_RUNNING; 1096 } 1097 1098 break; 1099 1100 #ifdef SIOCSIFMTU 1101 #ifndef ifr_mtu 1102 #define ifr_mtu ifr_metric 1103 #endif 1104 case SIOCSIFMTU: 1105 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru) 1106 return (EINVAL); 1107 ifp->if_mtu = ifr->ifr_mtu; 1108 break; 1109 #endif 1110 #ifdef SLIOCSETMTU 1111 case SLIOCSETMTU: 1112 if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru) 1113 return (EINVAL); 1114 ifp->if_mtu = *(short*)data; 1115 break; 1116 #endif 1117 #ifdef SIOCGIFMTU 1118 case SIOCGIFMTU: 1119 ifr->ifr_mtu = ifp->if_mtu; 1120 break; 1121 #endif 1122 #ifdef SLIOCGETMTU 1123 case SLIOCGETMTU: 1124 *(short*)data = ifp->if_mtu; 1125 break; 1126 #endif 1127 case SIOCADDMULTI: 1128 case SIOCDELMULTI: 1129 break; 1130 1131 case SIOCGIFGENERIC: 1132 case SIOCSIFGENERIC: 1133 rv = sppp_params(sp, cmd, data); 1134 break; 1135 1136 default: 1137 rv = ENOTTY; 1138 } 1139 splx(s); 1140 return rv; 1141 } 1142 1143 1144 /* 1146 * Cisco framing implementation. 1147 */ 1148 1149 /* 1150 * Handle incoming Cisco keepalive protocol packets. 1151 */ 1152 static void 1153 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1154 { 1155 STDDCL; 1156 struct cisco_packet *h; 1157 u_long me, mymask; 1158 1159 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1160 if (debug) 1161 log(LOG_DEBUG, 1162 SPP_FMT "cisco invalid packet length: %d bytes\n", 1163 SPP_ARGS(ifp), m->m_pkthdr.len); 1164 return; 1165 } 1166 h = mtod (m, struct cisco_packet*); 1167 if (debug) 1168 log(LOG_DEBUG, 1169 SPP_FMT "cisco input: %d bytes " 1170 "<0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n", 1171 SPP_ARGS(ifp), m->m_pkthdr.len, 1172 (u_long)ntohl (h->type), (u_long)h->par1, (u_long)h->par2, (u_int)h->rel, 1173 (u_int)h->time0, (u_int)h->time1); 1174 switch (ntohl (h->type)) { 1175 default: 1176 if (debug) 1177 addlog(SPP_FMT "cisco unknown packet type: 0x%lx\n", 1178 SPP_ARGS(ifp), (u_long)ntohl (h->type)); 1179 break; 1180 case CISCO_ADDR_REPLY: 1181 /* Reply on address request, ignore */ 1182 break; 1183 case CISCO_KEEPALIVE_REQ: 1184 sp->pp_alivecnt = 0; 1185 sp->pp_rseq[IDX_LCP] = ntohl (h->par1); 1186 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 1187 /* Local and remote sequence numbers are equal. 1188 * Probably, the line is in loopback mode. */ 1189 if (sp->pp_loopcnt >= MAXALIVECNT) { 1190 printf (SPP_FMT "loopback\n", 1191 SPP_ARGS(ifp)); 1192 sp->pp_loopcnt = 0; 1193 if (ifp->if_flags & IFF_UP) { 1194 if_down (ifp); 1195 sppp_qflush (&sp->pp_cpq); 1196 } 1197 } 1198 ++sp->pp_loopcnt; 1199 1200 /* Generate new local sequence number */ 1201 #if defined(__NetBSD__) || (defined(__FreeBSD__) && __FreeBSD__ >= 3) 1202 sp->pp_seq[IDX_LCP] = random(); 1203 #else 1204 sp->pp_seq[IDX_LCP] ^= time.tv_sec ^ time.tv_usec; 1205 #endif 1206 break; 1207 } 1208 sp->pp_loopcnt = 0; 1209 if (! (ifp->if_flags & IFF_UP) && 1210 (ifp->if_flags & IFF_RUNNING)) { 1211 if_up(ifp); 1212 printf (SPP_FMT "up\n", SPP_ARGS(ifp)); 1213 } 1214 break; 1215 case CISCO_ADDR_REQ: 1216 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1217 if (me != 0L) 1218 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1219 break; 1220 } 1221 } 1222 1223 /* 1224 * Send Cisco keepalive packet. 1225 */ 1226 static void 1227 sppp_cisco_send(struct sppp *sp, int type, long par1, long par2) 1228 { 1229 STDDCL; 1230 struct ppp_header *h; 1231 struct cisco_packet *ch; 1232 struct mbuf *m; 1233 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 1234 struct timeval tv; 1235 #else 1236 u_long t = (time.tv_sec - boottime.tv_sec) * 1000; 1237 #endif 1238 1239 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 1240 getmicrouptime(&tv); 1241 #endif 1242 1243 MGETHDR (m, M_DONTWAIT, MT_DATA); 1244 if (! m) 1245 return; 1246 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1247 m->m_pkthdr.rcvif = 0; 1248 1249 h = mtod (m, struct ppp_header*); 1250 h->address = CISCO_MULTICAST; 1251 h->control = 0; 1252 h->protocol = htons (CISCO_KEEPALIVE); 1253 1254 ch = (struct cisco_packet*) (h + 1); 1255 ch->type = htonl (type); 1256 ch->par1 = htonl (par1); 1257 ch->par2 = htonl (par2); 1258 ch->rel = -1; 1259 1260 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 1261 ch->time0 = htons ((u_short) (tv.tv_sec >> 16)); 1262 ch->time1 = htons ((u_short) tv.tv_sec); 1263 #else 1264 ch->time0 = htons ((u_short) (t >> 16)); 1265 ch->time1 = htons ((u_short) t); 1266 #endif 1267 1268 if (debug) 1269 log(LOG_DEBUG, 1270 SPP_FMT "cisco output: <0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n", 1271 SPP_ARGS(ifp), (u_long)ntohl (ch->type), (u_long)ch->par1, 1272 (u_long)ch->par2, (u_int)ch->rel, (u_int)ch->time0, (u_int)ch->time1); 1273 1274 if (IF_QFULL (&sp->pp_cpq)) { 1275 IF_DROP (&sp->pp_fastq); 1276 IF_DROP (&ifp->if_snd); 1277 m_freem (m); 1278 } else 1279 IF_ENQUEUE (&sp->pp_cpq, m); 1280 if (! (ifp->if_flags & IFF_OACTIVE)) 1281 (*ifp->if_start) (ifp); 1282 ifp->if_obytes += m->m_pkthdr.len + 3; 1283 } 1284 1285 /* 1287 * PPP protocol implementation. 1288 */ 1289 1290 /* 1291 * Send PPP control protocol packet. 1292 */ 1293 static void 1294 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1295 u_char ident, u_short len, void *data) 1296 { 1297 STDDCL; 1298 struct ppp_header *h; 1299 struct lcp_header *lh; 1300 struct mbuf *m; 1301 1302 if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN) 1303 len = MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN; 1304 MGETHDR (m, M_DONTWAIT, MT_DATA); 1305 if (! m) 1306 return; 1307 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len; 1308 m->m_pkthdr.rcvif = 0; 1309 1310 h = mtod (m, struct ppp_header*); 1311 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1312 h->control = PPP_UI; /* Unnumbered Info */ 1313 h->protocol = htons (proto); /* Link Control Protocol */ 1314 1315 lh = (struct lcp_header*) (h + 1); 1316 lh->type = type; 1317 lh->ident = ident; 1318 lh->len = htons (LCP_HEADER_LEN + len); 1319 if (len) 1320 bcopy (data, lh+1, len); 1321 1322 if (debug) { 1323 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 1324 SPP_ARGS(ifp), 1325 sppp_proto_name(proto), 1326 sppp_cp_type_name (lh->type), lh->ident, 1327 ntohs (lh->len)); 1328 if (len) 1329 sppp_print_bytes ((u_char*) (lh+1), len); 1330 addlog(">\n"); 1331 } 1332 if (IF_QFULL (&sp->pp_cpq)) { 1333 IF_DROP (&sp->pp_fastq); 1334 IF_DROP (&ifp->if_snd); 1335 m_freem (m); 1336 ++ifp->if_oerrors; 1337 } else 1338 IF_ENQUEUE (&sp->pp_cpq, m); 1339 if (! (ifp->if_flags & IFF_OACTIVE)) 1340 (*ifp->if_start) (ifp); 1341 ifp->if_obytes += m->m_pkthdr.len + 3; 1342 } 1343 1344 /* 1345 * Handle incoming PPP control protocol packets. 1346 */ 1347 static void 1348 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1349 { 1350 STDDCL; 1351 struct lcp_header *h; 1352 int len = m->m_pkthdr.len; 1353 int rv; 1354 u_char *p; 1355 1356 if (len < 4) { 1357 if (debug) 1358 log(LOG_DEBUG, 1359 SPP_FMT "%s invalid packet length: %d bytes\n", 1360 SPP_ARGS(ifp), cp->name, len); 1361 return; 1362 } 1363 h = mtod (m, struct lcp_header*); 1364 if (debug) { 1365 log(LOG_DEBUG, 1366 SPP_FMT "%s input(%s): <%s id=0x%x len=%d", 1367 SPP_ARGS(ifp), cp->name, 1368 sppp_state_name(sp->state[cp->protoidx]), 1369 sppp_cp_type_name (h->type), h->ident, ntohs (h->len)); 1370 if (len > 4) 1371 sppp_print_bytes ((u_char*) (h+1), len-4); 1372 addlog(">\n"); 1373 } 1374 if (len > ntohs (h->len)) 1375 len = ntohs (h->len); 1376 p = (u_char *)(h + 1); 1377 switch (h->type) { 1378 case CONF_REQ: 1379 if (len < 4) { 1380 if (debug) 1381 addlog(SPP_FMT "%s invalid conf-req length %d\n", 1382 SPP_ARGS(ifp), cp->name, 1383 len); 1384 ++ifp->if_ierrors; 1385 break; 1386 } 1387 /* handle states where RCR doesn't get a SCA/SCN */ 1388 switch (sp->state[cp->protoidx]) { 1389 case STATE_CLOSING: 1390 case STATE_STOPPING: 1391 return; 1392 case STATE_CLOSED: 1393 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1394 0, 0); 1395 return; 1396 } 1397 rv = (cp->RCR)(sp, h, len); 1398 switch (sp->state[cp->protoidx]) { 1399 case STATE_OPENED: 1400 (cp->tld)(sp); 1401 (cp->scr)(sp); 1402 /* fall through... */ 1403 case STATE_ACK_SENT: 1404 case STATE_REQ_SENT: 1405 sppp_cp_change_state(cp, sp, rv? 1406 STATE_ACK_SENT: STATE_REQ_SENT); 1407 break; 1408 case STATE_STOPPED: 1409 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1410 (cp->scr)(sp); 1411 sppp_cp_change_state(cp, sp, rv? 1412 STATE_ACK_SENT: STATE_REQ_SENT); 1413 break; 1414 case STATE_ACK_RCVD: 1415 if (rv) { 1416 sppp_cp_change_state(cp, sp, STATE_OPENED); 1417 if (debug) 1418 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1419 SPP_ARGS(ifp), 1420 cp->name); 1421 (cp->tlu)(sp); 1422 } else 1423 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1424 break; 1425 default: 1426 printf(SPP_FMT "%s illegal %s in state %s\n", 1427 SPP_ARGS(ifp), cp->name, 1428 sppp_cp_type_name(h->type), 1429 sppp_state_name(sp->state[cp->protoidx])); 1430 ++ifp->if_ierrors; 1431 } 1432 break; 1433 case CONF_ACK: 1434 if (h->ident != sp->confid[cp->protoidx]) { 1435 if (debug) 1436 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1437 SPP_ARGS(ifp), cp->name, 1438 h->ident, sp->confid[cp->protoidx]); 1439 ++ifp->if_ierrors; 1440 break; 1441 } 1442 switch (sp->state[cp->protoidx]) { 1443 case STATE_CLOSED: 1444 case STATE_STOPPED: 1445 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1446 break; 1447 case STATE_CLOSING: 1448 case STATE_STOPPING: 1449 break; 1450 case STATE_REQ_SENT: 1451 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1452 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1453 break; 1454 case STATE_OPENED: 1455 (cp->tld)(sp); 1456 /* fall through */ 1457 case STATE_ACK_RCVD: 1458 (cp->scr)(sp); 1459 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1460 break; 1461 case STATE_ACK_SENT: 1462 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1463 sppp_cp_change_state(cp, sp, STATE_OPENED); 1464 if (debug) 1465 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 1466 SPP_ARGS(ifp), cp->name); 1467 (cp->tlu)(sp); 1468 break; 1469 default: 1470 printf(SPP_FMT "%s illegal %s in state %s\n", 1471 SPP_ARGS(ifp), cp->name, 1472 sppp_cp_type_name(h->type), 1473 sppp_state_name(sp->state[cp->protoidx])); 1474 ++ifp->if_ierrors; 1475 } 1476 break; 1477 case CONF_NAK: 1478 case CONF_REJ: 1479 if (h->ident != sp->confid[cp->protoidx]) { 1480 if (debug) 1481 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 1482 SPP_ARGS(ifp), cp->name, 1483 h->ident, sp->confid[cp->protoidx]); 1484 ++ifp->if_ierrors; 1485 break; 1486 } 1487 if (h->type == CONF_NAK) 1488 (cp->RCN_nak)(sp, h, len); 1489 else /* CONF_REJ */ 1490 (cp->RCN_rej)(sp, h, len); 1491 1492 switch (sp->state[cp->protoidx]) { 1493 case STATE_CLOSED: 1494 case STATE_STOPPED: 1495 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1496 break; 1497 case STATE_REQ_SENT: 1498 case STATE_ACK_SENT: 1499 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1500 (cp->scr)(sp); 1501 break; 1502 case STATE_OPENED: 1503 (cp->tld)(sp); 1504 /* fall through */ 1505 case STATE_ACK_RCVD: 1506 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1507 (cp->scr)(sp); 1508 break; 1509 case STATE_CLOSING: 1510 case STATE_STOPPING: 1511 break; 1512 default: 1513 printf(SPP_FMT "%s illegal %s in state %s\n", 1514 SPP_ARGS(ifp), cp->name, 1515 sppp_cp_type_name(h->type), 1516 sppp_state_name(sp->state[cp->protoidx])); 1517 ++ifp->if_ierrors; 1518 } 1519 break; 1520 1521 case TERM_REQ: 1522 switch (sp->state[cp->protoidx]) { 1523 case STATE_ACK_RCVD: 1524 case STATE_ACK_SENT: 1525 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1526 /* fall through */ 1527 case STATE_CLOSED: 1528 case STATE_STOPPED: 1529 case STATE_CLOSING: 1530 case STATE_STOPPING: 1531 case STATE_REQ_SENT: 1532 sta: 1533 /* Send Terminate-Ack packet. */ 1534 if (debug) 1535 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n", 1536 SPP_ARGS(ifp), cp->name); 1537 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1538 break; 1539 case STATE_OPENED: 1540 (cp->tld)(sp); 1541 sp->rst_counter[cp->protoidx] = 0; 1542 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1543 goto sta; 1544 break; 1545 default: 1546 printf(SPP_FMT "%s illegal %s in state %s\n", 1547 SPP_ARGS(ifp), cp->name, 1548 sppp_cp_type_name(h->type), 1549 sppp_state_name(sp->state[cp->protoidx])); 1550 ++ifp->if_ierrors; 1551 } 1552 break; 1553 case TERM_ACK: 1554 switch (sp->state[cp->protoidx]) { 1555 case STATE_CLOSED: 1556 case STATE_STOPPED: 1557 case STATE_REQ_SENT: 1558 case STATE_ACK_SENT: 1559 break; 1560 case STATE_CLOSING: 1561 (cp->tlf)(sp); 1562 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1563 sppp_lcp_check_and_close(sp); 1564 break; 1565 case STATE_STOPPING: 1566 (cp->tlf)(sp); 1567 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1568 sppp_lcp_check_and_close(sp); 1569 break; 1570 case STATE_ACK_RCVD: 1571 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1572 break; 1573 case STATE_OPENED: 1574 (cp->tld)(sp); 1575 (cp->scr)(sp); 1576 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1577 break; 1578 default: 1579 printf(SPP_FMT "%s illegal %s in state %s\n", 1580 SPP_ARGS(ifp), cp->name, 1581 sppp_cp_type_name(h->type), 1582 sppp_state_name(sp->state[cp->protoidx])); 1583 ++ifp->if_ierrors; 1584 } 1585 break; 1586 case CODE_REJ: 1587 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1588 log(LOG_INFO, 1589 SPP_FMT "%s: ignoring RXJ (%s) for code ?, " 1590 "danger will robinson\n", 1591 SPP_ARGS(ifp), cp->name, 1592 sppp_cp_type_name(h->type)); 1593 switch (sp->state[cp->protoidx]) { 1594 case STATE_CLOSED: 1595 case STATE_STOPPED: 1596 case STATE_REQ_SENT: 1597 case STATE_ACK_SENT: 1598 case STATE_CLOSING: 1599 case STATE_STOPPING: 1600 case STATE_OPENED: 1601 break; 1602 case STATE_ACK_RCVD: 1603 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1604 break; 1605 default: 1606 printf(SPP_FMT "%s illegal %s in state %s\n", 1607 SPP_ARGS(ifp), cp->name, 1608 sppp_cp_type_name(h->type), 1609 sppp_state_name(sp->state[cp->protoidx])); 1610 ++ifp->if_ierrors; 1611 } 1612 break; 1613 case PROTO_REJ: 1614 { 1615 int catastrophic; 1616 const struct cp *upper; 1617 int i; 1618 u_int16_t proto; 1619 1620 catastrophic = 0; 1621 upper = NULL; 1622 proto = ntohs(*((u_int16_t *)p)); 1623 for (i = 0; i < IDX_COUNT; i++) { 1624 if (cps[i]->proto == proto) { 1625 upper = cps[i]; 1626 break; 1627 } 1628 } 1629 if (upper == NULL) 1630 catastrophic++; 1631 1632 log(LOG_INFO, 1633 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1634 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+', 1635 sppp_cp_type_name(h->type), proto, 1636 upper ? upper->name : "unknown", 1637 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1638 1639 /* 1640 * if we got RXJ+ against conf-req, the peer does not implement 1641 * this particular protocol type. terminate the protocol. 1642 */ 1643 if (upper && !catastrophic) { 1644 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1645 upper->Close(sp); 1646 break; 1647 } 1648 } 1649 1650 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1651 switch (sp->state[cp->protoidx]) { 1652 case STATE_CLOSED: 1653 case STATE_STOPPED: 1654 case STATE_REQ_SENT: 1655 case STATE_ACK_SENT: 1656 case STATE_CLOSING: 1657 case STATE_STOPPING: 1658 case STATE_OPENED: 1659 break; 1660 case STATE_ACK_RCVD: 1661 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1662 break; 1663 default: 1664 printf(SPP_FMT "%s illegal %s in state %s\n", 1665 SPP_ARGS(ifp), cp->name, 1666 sppp_cp_type_name(h->type), 1667 sppp_state_name(sp->state[cp->protoidx])); 1668 ++ifp->if_ierrors; 1669 } 1670 break; 1671 } 1672 case DISC_REQ: 1673 if (cp->proto != PPP_LCP) 1674 goto illegal; 1675 /* Discard the packet. */ 1676 break; 1677 case ECHO_REQ: 1678 if (cp->proto != PPP_LCP) 1679 goto illegal; 1680 if (sp->state[cp->protoidx] != STATE_OPENED) { 1681 if (debug) 1682 addlog(SPP_FMT "lcp echo req but lcp closed\n", 1683 SPP_ARGS(ifp)); 1684 ++ifp->if_ierrors; 1685 break; 1686 } 1687 if (len < 8) { 1688 if (debug) 1689 addlog(SPP_FMT "invalid lcp echo request " 1690 "packet length: %d bytes\n", 1691 SPP_ARGS(ifp), len); 1692 break; 1693 } 1694 if (ntohl (*(long*)(h+1)) == sp->lcp.magic) { 1695 /* Line loopback mode detected. */ 1696 printf(SPP_FMT "loopback\n", SPP_ARGS(ifp)); 1697 if_down (ifp); 1698 sppp_qflush (&sp->pp_cpq); 1699 1700 /* Shut down the PPP link. */ 1701 /* XXX */ 1702 lcp.Down(sp); 1703 lcp.Up(sp); 1704 break; 1705 } 1706 *(long*)(h+1) = htonl (sp->lcp.magic); 1707 if (debug) 1708 addlog(SPP_FMT "got lcp echo req, sending echo rep\n", 1709 SPP_ARGS(ifp)); 1710 sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1); 1711 break; 1712 case ECHO_REPLY: 1713 if (cp->proto != PPP_LCP) 1714 goto illegal; 1715 if (h->ident != sp->lcp.echoid) { 1716 ++ifp->if_ierrors; 1717 break; 1718 } 1719 if (len < 8) { 1720 if (debug) 1721 addlog(SPP_FMT "lcp invalid echo reply " 1722 "packet length: %d bytes\n", 1723 SPP_ARGS(ifp), len); 1724 break; 1725 } 1726 if (debug) 1727 addlog(SPP_FMT "lcp got echo rep\n", 1728 SPP_ARGS(ifp)); 1729 if (ntohl (*(long*)(h+1)) != sp->lcp.magic) 1730 sp->pp_alivecnt = 0; 1731 break; 1732 default: 1733 /* Unknown packet type -- send Code-Reject packet. */ 1734 illegal: 1735 if (debug) 1736 addlog(SPP_FMT "%s send code-rej for 0x%x\n", 1737 SPP_ARGS(ifp), cp->name, h->type); 1738 sppp_cp_send(sp, cp->proto, CODE_REJ, 1739 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 1740 ++ifp->if_ierrors; 1741 } 1742 } 1743 1744 1745 /* 1746 * The generic part of all Up/Down/Open/Close/TO event handlers. 1747 * Basically, the state transition handling in the automaton. 1748 */ 1749 static void 1750 sppp_up_event(const struct cp *cp, struct sppp *sp) 1751 { 1752 STDDCL; 1753 1754 if (debug) 1755 log(LOG_DEBUG, SPP_FMT "%s up(%s)\n", 1756 SPP_ARGS(ifp), cp->name, 1757 sppp_state_name(sp->state[cp->protoidx])); 1758 1759 switch (sp->state[cp->protoidx]) { 1760 case STATE_INITIAL: 1761 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1762 break; 1763 case STATE_STARTING: 1764 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1765 (cp->scr)(sp); 1766 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1767 break; 1768 default: 1769 printf(SPP_FMT "%s illegal up in state %s\n", 1770 SPP_ARGS(ifp), cp->name, 1771 sppp_state_name(sp->state[cp->protoidx])); 1772 } 1773 } 1774 1775 static void 1776 sppp_down_event(const struct cp *cp, struct sppp *sp) 1777 { 1778 STDDCL; 1779 1780 if (debug) 1781 log(LOG_DEBUG, SPP_FMT "%s down(%s)\n", 1782 SPP_ARGS(ifp), cp->name, 1783 sppp_state_name(sp->state[cp->protoidx])); 1784 1785 switch (sp->state[cp->protoidx]) { 1786 case STATE_CLOSED: 1787 case STATE_CLOSING: 1788 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1789 break; 1790 case STATE_STOPPED: 1791 (cp->tls)(sp); 1792 /* fall through */ 1793 case STATE_STOPPING: 1794 case STATE_REQ_SENT: 1795 case STATE_ACK_RCVD: 1796 case STATE_ACK_SENT: 1797 sppp_cp_change_state(cp, sp, STATE_STARTING); 1798 break; 1799 case STATE_OPENED: 1800 (cp->tld)(sp); 1801 sppp_cp_change_state(cp, sp, STATE_STARTING); 1802 break; 1803 default: 1804 printf(SPP_FMT "%s illegal down in state %s\n", 1805 SPP_ARGS(ifp), cp->name, 1806 sppp_state_name(sp->state[cp->protoidx])); 1807 } 1808 } 1809 1810 1811 static void 1812 sppp_open_event(const struct cp *cp, struct sppp *sp) 1813 { 1814 STDDCL; 1815 1816 if (debug) 1817 log(LOG_DEBUG, SPP_FMT "%s open(%s)\n", 1818 SPP_ARGS(ifp), cp->name, 1819 sppp_state_name(sp->state[cp->protoidx])); 1820 1821 switch (sp->state[cp->protoidx]) { 1822 case STATE_INITIAL: 1823 (cp->tls)(sp); 1824 sppp_cp_change_state(cp, sp, STATE_STARTING); 1825 break; 1826 case STATE_STARTING: 1827 break; 1828 case STATE_CLOSED: 1829 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1830 (cp->scr)(sp); 1831 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1832 break; 1833 case STATE_STOPPED: 1834 case STATE_STOPPING: 1835 case STATE_REQ_SENT: 1836 case STATE_ACK_RCVD: 1837 case STATE_ACK_SENT: 1838 case STATE_OPENED: 1839 break; 1840 case STATE_CLOSING: 1841 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1842 break; 1843 } 1844 } 1845 1846 1847 static void 1848 sppp_close_event(const struct cp *cp, struct sppp *sp) 1849 { 1850 STDDCL; 1851 1852 if (debug) 1853 log(LOG_DEBUG, SPP_FMT "%s close(%s)\n", 1854 SPP_ARGS(ifp), cp->name, 1855 sppp_state_name(sp->state[cp->protoidx])); 1856 1857 switch (sp->state[cp->protoidx]) { 1858 case STATE_INITIAL: 1859 case STATE_CLOSED: 1860 case STATE_CLOSING: 1861 break; 1862 case STATE_STARTING: 1863 (cp->tlf)(sp); 1864 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1865 break; 1866 case STATE_STOPPED: 1867 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1868 break; 1869 case STATE_STOPPING: 1870 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1871 break; 1872 case STATE_OPENED: 1873 (cp->tld)(sp); 1874 /* fall through */ 1875 case STATE_REQ_SENT: 1876 case STATE_ACK_RCVD: 1877 case STATE_ACK_SENT: 1878 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 1879 sppp_cp_send(sp, cp->proto, TERM_REQ, 1880 ++sp->pp_seq[cp->protoidx], 0, 0); 1881 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1882 break; 1883 } 1884 } 1885 1886 static void 1887 sppp_to_event(const struct cp *cp, struct sppp *sp) 1888 { 1889 STDDCL; 1890 int s; 1891 1892 s = splimp(); 1893 if (debug) 1894 log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n", 1895 SPP_ARGS(ifp), cp->name, 1896 sppp_state_name(sp->state[cp->protoidx]), 1897 sp->rst_counter[cp->protoidx]); 1898 1899 if (--sp->rst_counter[cp->protoidx] < 0) 1900 /* TO- event */ 1901 switch (sp->state[cp->protoidx]) { 1902 case STATE_CLOSING: 1903 (cp->tlf)(sp); 1904 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1905 sppp_lcp_check_and_close(sp); 1906 break; 1907 case STATE_STOPPING: 1908 (cp->tlf)(sp); 1909 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1910 sppp_lcp_check_and_close(sp); 1911 break; 1912 case STATE_REQ_SENT: 1913 case STATE_ACK_RCVD: 1914 case STATE_ACK_SENT: 1915 (cp->tlf)(sp); 1916 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1917 sppp_lcp_check_and_close(sp); 1918 break; 1919 } 1920 else 1921 /* TO+ event */ 1922 switch (sp->state[cp->protoidx]) { 1923 case STATE_CLOSING: 1924 case STATE_STOPPING: 1925 sppp_cp_send(sp, cp->proto, TERM_REQ, 1926 ++sp->pp_seq[cp->protoidx], 0, 0); 1927 #if defined(__NetBSD__) 1928 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1929 cp->TO, sp); 1930 #else 1931 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 1932 sp->ch[cp->protoidx] = 1933 #endif 1934 timeout(cp->TO, (void *)sp, sp->lcp.timeout); 1935 #endif /* __NetBSD__ */ 1936 break; 1937 case STATE_REQ_SENT: 1938 case STATE_ACK_RCVD: 1939 (cp->scr)(sp); 1940 /* sppp_cp_change_state() will restart the timer */ 1941 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1942 break; 1943 case STATE_ACK_SENT: 1944 (cp->scr)(sp); 1945 #if defined(__NetBSD__) 1946 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1947 cp->TO, sp); 1948 #else 1949 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 1950 sp->ch[cp->protoidx] = 1951 #endif 1952 timeout(cp->TO, (void *)sp, sp->lcp.timeout); 1953 #endif /* __NetBSD__ */ 1954 break; 1955 } 1956 1957 splx(s); 1958 } 1959 1960 /* 1961 * Change the state of a control protocol in the state automaton. 1962 * Takes care of starting/stopping the restart timer. 1963 */ 1964 void 1965 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 1966 { 1967 sp->state[cp->protoidx] = newstate; 1968 1969 #if defined(__NetBSD__) 1970 callout_stop(&sp->ch[cp->protoidx]); 1971 #else 1972 untimeout(cp->TO, (void *)sp 1973 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 1974 , sp->ch[cp->protoidx] 1975 #endif 1976 ); 1977 #endif /* __NetBSD__ */ 1978 switch (newstate) { 1979 case STATE_INITIAL: 1980 case STATE_STARTING: 1981 case STATE_CLOSED: 1982 case STATE_STOPPED: 1983 case STATE_OPENED: 1984 break; 1985 case STATE_CLOSING: 1986 case STATE_STOPPING: 1987 case STATE_REQ_SENT: 1988 case STATE_ACK_RCVD: 1989 case STATE_ACK_SENT: 1990 #if defined(__NetBSD__) 1991 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1992 cp->TO, sp); 1993 #else 1994 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 1995 sp->ch[cp->protoidx] = 1996 #endif 1997 timeout(cp->TO, (void *)sp, sp->lcp.timeout); 1998 #endif /* __NetBSD__ */ 1999 break; 2000 } 2001 } 2002 /* 2004 *--------------------------------------------------------------------------* 2005 * * 2006 * The LCP implementation. * 2007 * * 2008 *--------------------------------------------------------------------------* 2009 */ 2010 static void 2011 sppp_lcp_init(struct sppp *sp) 2012 { 2013 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 2014 sp->lcp.magic = 0; 2015 sp->state[IDX_LCP] = STATE_INITIAL; 2016 sp->fail_counter[IDX_LCP] = 0; 2017 sp->pp_seq[IDX_LCP] = 0; 2018 sp->pp_rseq[IDX_LCP] = 0; 2019 sp->lcp.protos = 0; 2020 sp->lcp.mru = sp->lcp.their_mru = PP_MTU; 2021 2022 /* 2023 * Initialize counters and timeout values. Note that we don't 2024 * use the 3 seconds suggested in RFC 1661 since we are likely 2025 * running on a fast link. XXX We should probably implement 2026 * the exponential backoff option. Note that these values are 2027 * relevant for all control protocols, not just LCP only. 2028 */ 2029 sp->lcp.timeout = 1 * hz; 2030 sp->lcp.max_terminate = 2; 2031 sp->lcp.max_configure = 10; 2032 sp->lcp.max_failure = 10; 2033 #if defined(__NetBSD__) 2034 callout_init(&sp->ch[IDX_LCP]); 2035 #endif 2036 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 2037 callout_handle_init(&sp->ch[IDX_LCP]); 2038 #endif 2039 } 2040 2041 static void 2042 sppp_lcp_up(struct sppp *sp) 2043 { 2044 STDDCL; 2045 2046 /* 2047 * If this interface is passive or dial-on-demand, and we are 2048 * still in Initial state, it means we've got an incoming 2049 * call. Activate the interface. 2050 */ 2051 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2052 if (debug) 2053 log(LOG_DEBUG, 2054 SPP_FMT "Up event", SPP_ARGS(ifp)); 2055 ifp->if_flags |= IFF_RUNNING; 2056 if (sp->state[IDX_LCP] == STATE_INITIAL) { 2057 if (debug) 2058 addlog("(incoming call)\n"); 2059 sp->pp_flags |= PP_CALLIN; 2060 lcp.Open(sp); 2061 } else if (debug) 2062 addlog("\n"); 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 log(LOG_INFO, 2084 SPP_FMT "Down event (carrier loss), taking interface down.\n", 2085 SPP_ARGS(ifp)); 2086 if_down(ifp); 2087 } else { 2088 if (debug) 2089 log(LOG_DEBUG, 2090 SPP_FMT "Down event (carrier loss)\n", 2091 SPP_ARGS(ifp)); 2092 } 2093 sp->pp_flags &= ~PP_CALLIN; 2094 if (sp->state[IDX_LCP] != STATE_INITIAL) 2095 lcp.Close(sp); 2096 ifp->if_flags &= ~IFF_RUNNING; 2097 } 2098 2099 static void 2100 sppp_lcp_open(struct sppp *sp) 2101 { 2102 /* 2103 * If we are authenticator, negotiate LCP_AUTH 2104 */ 2105 if (sp->hisauth.proto != 0) 2106 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2107 else 2108 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2109 sp->pp_flags &= ~PP_NEEDAUTH; 2110 sppp_open_event(&lcp, sp); 2111 } 2112 2113 static void 2114 sppp_lcp_close(struct sppp *sp) 2115 { 2116 sppp_close_event(&lcp, sp); 2117 } 2118 2119 static void 2120 sppp_lcp_TO(void *cookie) 2121 { 2122 sppp_to_event(&lcp, (struct sppp *)cookie); 2123 } 2124 2125 /* 2126 * Analyze a configure request. Return true if it was agreeable, and 2127 * caused action sca, false if it has been rejected or nak'ed, and 2128 * caused action scn. (The return value is used to make the state 2129 * transition decision in the state automaton.) 2130 */ 2131 static int 2132 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2133 { 2134 STDDCL; 2135 u_char *buf, *r, *p; 2136 int origlen, rlen; 2137 u_long nmagic; 2138 u_short authproto; 2139 2140 len -= 4; 2141 origlen = len; 2142 buf = r = malloc (len, M_TEMP, M_NOWAIT); 2143 if (! buf) 2144 return (0); 2145 2146 if (debug) 2147 log(LOG_DEBUG, SPP_FMT "lcp parse opts:", 2148 SPP_ARGS(ifp)); 2149 2150 /* pass 1: check for things that need to be rejected */ 2151 p = (void*) (h+1); 2152 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2153 if (debug) 2154 addlog(" %s", sppp_lcp_opt_name(*p)); 2155 switch (*p) { 2156 case LCP_OPT_MAGIC: 2157 /* Magic number. */ 2158 /* fall through, both are same length */ 2159 case LCP_OPT_ASYNC_MAP: 2160 /* Async control character map. */ 2161 if (len >= 6 || p[1] == 6) 2162 continue; 2163 if (debug) 2164 addlog(" [invalid]"); 2165 break; 2166 case LCP_OPT_MRU: 2167 /* Maximum receive unit. */ 2168 if (len >= 4 && p[1] == 4) 2169 continue; 2170 if (debug) 2171 addlog(" [invalid]"); 2172 break; 2173 case LCP_OPT_AUTH_PROTO: 2174 if (len < 4) { 2175 if (debug) 2176 addlog(" [invalid]"); 2177 break; 2178 } 2179 authproto = (p[2] << 8) + p[3]; 2180 if (authproto == PPP_CHAP && p[1] != 5) { 2181 if (debug) 2182 addlog(" [invalid chap len]"); 2183 break; 2184 } 2185 if (sp->myauth.proto == 0) { 2186 /* we are not configured to do auth */ 2187 if (debug) 2188 addlog(" [not configured]"); 2189 break; 2190 } 2191 /* 2192 * Remote want us to authenticate, remember this, 2193 * so we stay in PHASE_AUTHENTICATE after LCP got 2194 * up. 2195 */ 2196 sp->pp_flags |= PP_NEEDAUTH; 2197 continue; 2198 default: 2199 /* Others not supported. */ 2200 if (debug) 2201 addlog(" [rej]"); 2202 break; 2203 } 2204 /* Add the option to rejected list. */ 2205 bcopy (p, r, p[1]); 2206 r += p[1]; 2207 rlen += p[1]; 2208 } 2209 if (rlen) { 2210 if (debug) 2211 addlog(" send conf-rej\n"); 2212 sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2213 goto end; 2214 } else if (debug) 2215 addlog("\n"); 2216 2217 /* 2218 * pass 2: check for option values that are unacceptable and 2219 * thus require to be nak'ed. 2220 */ 2221 if (debug) 2222 log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ", 2223 SPP_ARGS(ifp)); 2224 2225 p = (void*) (h+1); 2226 len = origlen; 2227 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2228 if (debug) 2229 addlog(" %s", sppp_lcp_opt_name(*p)); 2230 switch (*p) { 2231 case LCP_OPT_MAGIC: 2232 /* Magic number -- extract. */ 2233 nmagic = (u_long)p[2] << 24 | 2234 (u_long)p[3] << 16 | p[4] << 8 | p[5]; 2235 if (nmagic != sp->lcp.magic) { 2236 if (debug) 2237 addlog(" 0x%lx", nmagic); 2238 continue; 2239 } 2240 /* 2241 * Local and remote magics equal -- loopback? 2242 */ 2243 if (sp->pp_loopcnt >= MAXALIVECNT*5) { 2244 printf (SPP_FMT "loopback\n", 2245 SPP_ARGS(ifp)); 2246 sp->pp_loopcnt = 0; 2247 if (ifp->if_flags & IFF_UP) { 2248 if_down(ifp); 2249 sppp_qflush(&sp->pp_cpq); 2250 /* XXX ? */ 2251 lcp.Down(sp); 2252 lcp.Up(sp); 2253 } 2254 } else if (debug) 2255 addlog(" [glitch]"); 2256 ++sp->pp_loopcnt; 2257 /* 2258 * We negate our magic here, and NAK it. If 2259 * we see it later in an NAK packet, we 2260 * suggest a new one. 2261 */ 2262 nmagic = ~sp->lcp.magic; 2263 /* Gonna NAK it. */ 2264 p[2] = nmagic >> 24; 2265 p[3] = nmagic >> 16; 2266 p[4] = nmagic >> 8; 2267 p[5] = nmagic; 2268 break; 2269 2270 case LCP_OPT_ASYNC_MAP: 2271 /* Async control character map -- check to be zero. */ 2272 if (! p[2] && ! p[3] && ! p[4] && ! p[5]) { 2273 if (debug) 2274 addlog(" [empty]"); 2275 continue; 2276 } 2277 if (debug) 2278 addlog(" [non-empty]"); 2279 /* suggest a zero one */ 2280 p[2] = p[3] = p[4] = p[5] = 0; 2281 break; 2282 2283 case LCP_OPT_MRU: 2284 /* 2285 * Maximum receive unit. Always agreeable, 2286 * but ignored by now. 2287 */ 2288 sp->lcp.their_mru = p[2] * 256 + p[3]; 2289 if (debug) 2290 addlog(" %ld", sp->lcp.their_mru); 2291 continue; 2292 2293 case LCP_OPT_AUTH_PROTO: 2294 authproto = (p[2] << 8) + p[3]; 2295 if (sp->myauth.proto != authproto) { 2296 /* not agreed, nak */ 2297 if (debug) 2298 addlog(" [mine %s != his %s]", 2299 sppp_proto_name(sp->hisauth.proto), 2300 sppp_proto_name(authproto)); 2301 p[2] = sp->myauth.proto >> 8; 2302 p[3] = sp->myauth.proto; 2303 break; 2304 } 2305 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2306 if (debug) 2307 addlog(" [chap not MD5]"); 2308 p[4] = CHAP_MD5; 2309 break; 2310 } 2311 continue; 2312 } 2313 /* Add the option to nak'ed list. */ 2314 bcopy (p, r, p[1]); 2315 r += p[1]; 2316 rlen += p[1]; 2317 } 2318 if (rlen) { 2319 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2320 if (debug) 2321 addlog(" max_failure (%d) exceeded, " 2322 "send conf-rej\n", 2323 sp->lcp.max_failure); 2324 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2325 } else { 2326 if (debug) 2327 addlog(" send conf-nak\n"); 2328 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2329 } 2330 goto end; 2331 } else { 2332 if (debug) 2333 addlog(" send conf-ack\n"); 2334 sp->fail_counter[IDX_LCP] = 0; 2335 sp->pp_loopcnt = 0; 2336 sppp_cp_send (sp, PPP_LCP, CONF_ACK, 2337 h->ident, origlen, h+1); 2338 } 2339 2340 end: 2341 free (buf, M_TEMP); 2342 return (rlen == 0); 2343 } 2344 2345 /* 2346 * Analyze the LCP Configure-Reject option list, and adjust our 2347 * negotiation. 2348 */ 2349 static void 2350 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2351 { 2352 STDDCL; 2353 u_char *buf, *p; 2354 2355 len -= 4; 2356 buf = malloc (len, M_TEMP, M_NOWAIT); 2357 if (!buf) 2358 return; 2359 2360 if (debug) 2361 log(LOG_DEBUG, SPP_FMT "lcp rej opts:", 2362 SPP_ARGS(ifp)); 2363 2364 p = (void*) (h+1); 2365 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2366 if (debug) 2367 addlog(" %s", sppp_lcp_opt_name(*p)); 2368 switch (*p) { 2369 case LCP_OPT_MAGIC: 2370 /* Magic number -- can't use it, use 0 */ 2371 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2372 sp->lcp.magic = 0; 2373 break; 2374 case LCP_OPT_MRU: 2375 /* 2376 * Should not be rejected anyway, since we only 2377 * negotiate a MRU if explicitly requested by 2378 * peer. 2379 */ 2380 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2381 break; 2382 case LCP_OPT_AUTH_PROTO: 2383 /* 2384 * Peer doesn't want to authenticate himself, 2385 * deny unless this is a dialout call, and 2386 * AUTHFLAG_NOCALLOUT is set. 2387 */ 2388 if ((sp->pp_flags & PP_CALLIN) == 0 && 2389 (sp->hisauth.flags & AUTHFLAG_NOCALLOUT) != 0) { 2390 if (debug) 2391 addlog(" [don't insist on auth " 2392 "for callout]"); 2393 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2394 break; 2395 } 2396 if (debug) 2397 addlog("[access denied]\n"); 2398 lcp.Close(sp); 2399 break; 2400 } 2401 } 2402 if (debug) 2403 addlog("\n"); 2404 free (buf, M_TEMP); 2405 return; 2406 } 2407 2408 /* 2409 * Analyze the LCP Configure-NAK option list, and adjust our 2410 * negotiation. 2411 */ 2412 static void 2413 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2414 { 2415 STDDCL; 2416 u_char *buf, *p; 2417 u_long magic; 2418 2419 len -= 4; 2420 buf = malloc (len, M_TEMP, M_NOWAIT); 2421 if (!buf) 2422 return; 2423 2424 if (debug) 2425 log(LOG_DEBUG, SPP_FMT "lcp nak opts:", 2426 SPP_ARGS(ifp)); 2427 2428 p = (void*) (h+1); 2429 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2430 if (debug) 2431 addlog(" %s", sppp_lcp_opt_name(*p)); 2432 switch (*p) { 2433 case LCP_OPT_MAGIC: 2434 /* Magic number -- renegotiate */ 2435 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2436 len >= 6 && p[1] == 6) { 2437 magic = (u_long)p[2] << 24 | 2438 (u_long)p[3] << 16 | p[4] << 8 | p[5]; 2439 /* 2440 * If the remote magic is our negated one, 2441 * this looks like a loopback problem. 2442 * Suggest a new magic to make sure. 2443 */ 2444 if (magic == ~sp->lcp.magic) { 2445 if (debug) 2446 addlog(" magic glitch"); 2447 #if defined(__NetBSD__) || (defined(__FreeBSD__) && __FreeBSD__ >= 3) 2448 sp->lcp.magic = random(); 2449 #else 2450 sp->lcp.magic = time.tv_sec + time.tv_usec; 2451 #endif 2452 } else { 2453 sp->lcp.magic = magic; 2454 if (debug) 2455 addlog(" %ld", magic); 2456 } 2457 } 2458 break; 2459 case LCP_OPT_MRU: 2460 /* 2461 * Peer wants to advise us to negotiate an MRU. 2462 * Agree on it if it's reasonable, or use 2463 * default otherwise. 2464 */ 2465 if (len >= 4 && p[1] == 4) { 2466 u_int mru = p[2] * 256 + p[3]; 2467 if (debug) 2468 addlog(" %d", mru); 2469 if (mru < PP_MTU || mru > PP_MAX_MRU) 2470 mru = PP_MTU; 2471 sp->lcp.mru = mru; 2472 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2473 } 2474 break; 2475 case LCP_OPT_AUTH_PROTO: 2476 /* 2477 * Peer doesn't like our authentication method, 2478 * deny. 2479 */ 2480 if (debug) 2481 addlog("[access denied]\n"); 2482 lcp.Close(sp); 2483 break; 2484 } 2485 } 2486 if (debug) 2487 addlog("\n"); 2488 free (buf, M_TEMP); 2489 return; 2490 } 2491 2492 static void 2493 sppp_lcp_tlu(struct sppp *sp) 2494 { 2495 STDDCL; 2496 int i; 2497 u_long mask; 2498 2499 /* XXX ? */ 2500 if (! (ifp->if_flags & IFF_UP) && 2501 (ifp->if_flags & IFF_RUNNING)) { 2502 /* Coming out of loopback mode. */ 2503 if_up(ifp); 2504 printf (SPP_FMT "up\n", SPP_ARGS(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 = PHASE_AUTHENTICATE; 2514 else 2515 sp->pp_phase = 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 == 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 == 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_long mask; 2561 2562 sp->pp_phase = 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 sp->pp_phase = PHASE_ESTABLISH; 2589 2590 if(debug) 2591 { 2592 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2593 sppp_phase_name(sp->pp_phase)); 2594 } 2595 2596 /* Notify lower layer if desired. */ 2597 if (sp->pp_tls) 2598 (sp->pp_tls)(sp); 2599 } 2600 2601 static void 2602 sppp_lcp_tlf(struct sppp *sp) 2603 { 2604 STDDCL; 2605 2606 sp->pp_phase = PHASE_DEAD; 2607 2608 if(debug) 2609 { 2610 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 2611 sppp_phase_name(sp->pp_phase)); 2612 } 2613 2614 /* Notify lower layer if desired. */ 2615 if (sp->pp_tlf) 2616 (sp->pp_tlf)(sp); 2617 } 2618 2619 static void 2620 sppp_lcp_scr(struct sppp *sp) 2621 { 2622 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2623 int i = 0; 2624 u_short authproto; 2625 2626 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2627 if (! sp->lcp.magic) 2628 #if defined(__NetBSD__) || (defined(__FreeBSD__) && __FreeBSD__ >= 3) 2629 sp->lcp.magic = random(); 2630 #else 2631 sp->lcp.magic = time.tv_sec + time.tv_usec; 2632 #endif 2633 opt[i++] = LCP_OPT_MAGIC; 2634 opt[i++] = 6; 2635 opt[i++] = sp->lcp.magic >> 24; 2636 opt[i++] = sp->lcp.magic >> 16; 2637 opt[i++] = sp->lcp.magic >> 8; 2638 opt[i++] = sp->lcp.magic; 2639 } 2640 2641 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2642 opt[i++] = LCP_OPT_MRU; 2643 opt[i++] = 4; 2644 opt[i++] = sp->lcp.mru >> 8; 2645 opt[i++] = sp->lcp.mru; 2646 } 2647 2648 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2649 authproto = sp->hisauth.proto; 2650 opt[i++] = LCP_OPT_AUTH_PROTO; 2651 opt[i++] = authproto == PPP_CHAP? 5: 4; 2652 opt[i++] = authproto >> 8; 2653 opt[i++] = authproto; 2654 if (authproto == PPP_CHAP) 2655 opt[i++] = CHAP_MD5; 2656 } 2657 2658 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2659 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2660 } 2661 2662 /* 2663 * Check the open NCPs, return true if at least one NCP is open. 2664 */ 2665 static int 2666 sppp_ncp_check(struct sppp *sp) 2667 { 2668 int i, mask; 2669 2670 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2671 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2672 return 1; 2673 return 0; 2674 } 2675 2676 /* 2677 * Re-check the open NCPs and see if we should terminate the link. 2678 * Called by the NCPs during their tlf action handling. 2679 */ 2680 static void 2681 sppp_lcp_check_and_close(struct sppp *sp) 2682 { 2683 2684 if (sp->pp_phase < PHASE_NETWORK) 2685 /* don't bother, we are already going down */ 2686 return; 2687 2688 if (sppp_ncp_check(sp)) 2689 return; 2690 2691 lcp.Close(sp); 2692 } 2693 2694 2695 /* 2697 *--------------------------------------------------------------------------* 2698 * * 2699 * The IPCP implementation. * 2700 * * 2701 *--------------------------------------------------------------------------* 2702 */ 2703 2704 static void 2705 sppp_ipcp_init(struct sppp *sp) 2706 { 2707 sp->ipcp.opts = 0; 2708 sp->ipcp.flags = 0; 2709 sp->state[IDX_IPCP] = STATE_INITIAL; 2710 sp->fail_counter[IDX_IPCP] = 0; 2711 sp->pp_seq[IDX_IPCP] = 0; 2712 sp->pp_rseq[IDX_IPCP] = 0; 2713 #if defined(__NetBSD__) 2714 callout_init(&sp->ch[IDX_IPCP]); 2715 #endif 2716 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 2717 callout_handle_init(&sp->ch[IDX_IPCP]); 2718 #endif 2719 } 2720 2721 static void 2722 sppp_ipcp_up(struct sppp *sp) 2723 { 2724 sppp_up_event(&ipcp, sp); 2725 } 2726 2727 static void 2728 sppp_ipcp_down(struct sppp *sp) 2729 { 2730 sppp_down_event(&ipcp, sp); 2731 } 2732 2733 static void 2734 sppp_ipcp_open(struct sppp *sp) 2735 { 2736 STDDCL; 2737 u_long myaddr, hisaddr; 2738 2739 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN); 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 == 0L) { 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 } else 2764 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 2765 sppp_open_event(&ipcp, sp); 2766 } 2767 2768 static void 2769 sppp_ipcp_close(struct sppp *sp) 2770 { 2771 sppp_close_event(&ipcp, sp); 2772 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 2773 /* 2774 * My address was dynamic, clear it again. 2775 */ 2776 sppp_set_ip_addr(sp, 0L); 2777 } 2778 2779 static void 2780 sppp_ipcp_TO(void *cookie) 2781 { 2782 sppp_to_event(&ipcp, (struct sppp *)cookie); 2783 } 2784 2785 /* 2786 * Analyze a configure request. Return true if it was agreeable, and 2787 * caused action sca, false if it has been rejected or nak'ed, and 2788 * caused action scn. (The return value is used to make the state 2789 * transition decision in the state automaton.) 2790 */ 2791 static int 2792 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2793 { 2794 u_char *buf, *r, *p; 2795 struct ifnet *ifp = &sp->pp_if; 2796 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 2797 u_long hisaddr, desiredaddr; 2798 int gotmyaddr = 0; 2799 2800 len -= 4; 2801 origlen = len; 2802 /* 2803 * Make sure to allocate a buf that can at least hold a 2804 * conf-nak with an `address' option. We might need it below. 2805 */ 2806 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 2807 if (! buf) 2808 return (0); 2809 2810 /* pass 1: see if we can recognize them */ 2811 if (debug) 2812 log(LOG_DEBUG, SPP_FMT "ipcp parse opts:", 2813 SPP_ARGS(ifp)); 2814 p = (void*) (h+1); 2815 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2816 if (debug) 2817 addlog(" %s", sppp_ipcp_opt_name(*p)); 2818 switch (*p) { 2819 #ifdef notyet 2820 case IPCP_OPT_COMPRESSION: 2821 if (len >= 6 && p[1] >= 6) { 2822 /* correctly formed compress option */ 2823 continue; 2824 } 2825 if (debug) 2826 addlog(" [invalid]"); 2827 break; 2828 #endif 2829 case IPCP_OPT_ADDRESS: 2830 if (len >= 6 && p[1] == 6) { 2831 /* correctly formed address option */ 2832 continue; 2833 } 2834 if (debug) 2835 addlog(" [invalid]"); 2836 break; 2837 default: 2838 /* Others not supported. */ 2839 if (debug) 2840 addlog(" [rej]"); 2841 break; 2842 } 2843 /* Add the option to rejected list. */ 2844 bcopy (p, r, p[1]); 2845 r += p[1]; 2846 rlen += p[1]; 2847 } 2848 if (rlen) { 2849 if (debug) 2850 addlog(" send conf-rej\n"); 2851 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 2852 goto end; 2853 } else if (debug) 2854 addlog("\n"); 2855 2856 /* pass 2: parse option values */ 2857 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); 2858 if (debug) 2859 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ", 2860 SPP_ARGS(ifp)); 2861 p = (void*) (h+1); 2862 len = origlen; 2863 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2864 if (debug) 2865 addlog(" %s", sppp_ipcp_opt_name(*p)); 2866 switch (*p) { 2867 #ifdef notyet 2868 case IPCP_OPT_COMPRESSION: 2869 continue; 2870 #endif 2871 case IPCP_OPT_ADDRESS: 2872 desiredaddr = p[2] << 24 | p[3] << 16 | 2873 p[4] << 8 | p[5]; 2874 if (!(sp->ipcp.flags & IPCP_MYADDR_SEEN) && 2875 (sp->ipcp.flags & IPCP_MYADDR_DYN)) { 2876 /* 2877 * hopefully this is our address !! 2878 */ 2879 if (debug) 2880 addlog(" [wantmyaddr %s]", 2881 sppp_dotted_quad(desiredaddr)); 2882 /* 2883 * When doing dynamic address assignment, 2884 * we accept his offer. Otherwise, we 2885 * ignore it and thus continue to negotiate 2886 * our already existing value. 2887 */ 2888 sppp_set_ip_addr(sp, desiredaddr); 2889 if (debug) 2890 addlog(" [agree]"); 2891 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 2892 gotmyaddr++; 2893 continue; 2894 } else { 2895 if (desiredaddr == hisaddr || 2896 (hisaddr == 1 && desiredaddr != 0)) { 2897 /* 2898 * Peer's address is same as our value, 2899 * this is agreeable. Gonna conf-ack 2900 * it. 2901 */ 2902 if (debug) 2903 addlog(" %s [ack]", 2904 sppp_dotted_quad(hisaddr)); 2905 /* record that we've seen it already */ 2906 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 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 } 2931 /* Add the option to nak'ed list. */ 2932 bcopy (p, r, p[1]); 2933 r += p[1]; 2934 rlen += p[1]; 2935 } 2936 2937 /* 2938 * If we are about to conf-ack the request, but haven't seen 2939 * his address so far, gonna conf-nak it instead, with the 2940 * `address' option present and our idea of his address being 2941 * filled in there, to request negotiation of both addresses. 2942 * 2943 * XXX This can result in an endless req - nak loop if peer 2944 * doesn't want to send us his address. Q: What should we do 2945 * about it? XXX A: implement the max-failure counter. 2946 */ 2947 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN) && !gotmyaddr) { 2948 buf[0] = IPCP_OPT_ADDRESS; 2949 buf[1] = 6; 2950 buf[2] = hisaddr >> 24; 2951 buf[3] = hisaddr >> 16; 2952 buf[4] = hisaddr >> 8; 2953 buf[5] = hisaddr; 2954 rlen = 6; 2955 if (debug) 2956 addlog(" still need hisaddr"); 2957 } 2958 2959 if (rlen) { 2960 if (debug) 2961 addlog(" send conf-nak\n"); 2962 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 2963 } else { 2964 if (debug) 2965 addlog(" send conf-ack\n"); 2966 sppp_cp_send (sp, PPP_IPCP, CONF_ACK, 2967 h->ident, origlen, h+1); 2968 } 2969 2970 end: 2971 free (buf, M_TEMP); 2972 return (rlen == 0); 2973 } 2974 2975 /* 2976 * Analyze the IPCP Configure-Reject option list, and adjust our 2977 * negotiation. 2978 */ 2979 static void 2980 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2981 { 2982 u_char *buf, *p; 2983 struct ifnet *ifp = &sp->pp_if; 2984 int debug = ifp->if_flags & IFF_DEBUG; 2985 2986 len -= 4; 2987 buf = malloc (len, M_TEMP, M_NOWAIT); 2988 if (!buf) 2989 return; 2990 2991 if (debug) 2992 log(LOG_DEBUG, SPP_FMT "ipcp rej opts:", 2993 SPP_ARGS(ifp)); 2994 2995 p = (void*) (h+1); 2996 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2997 if (debug) 2998 addlog(" %s", sppp_ipcp_opt_name(*p)); 2999 switch (*p) { 3000 case IPCP_OPT_ADDRESS: 3001 /* 3002 * Peer doesn't grok address option. This is 3003 * bad. XXX Should we better give up here? 3004 */ 3005 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 3006 break; 3007 #ifdef notyet 3008 case IPCP_OPT_COMPRESS: 3009 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 3010 break; 3011 #endif 3012 } 3013 } 3014 if (debug) 3015 addlog("\n"); 3016 free (buf, M_TEMP); 3017 return; 3018 } 3019 3020 /* 3021 * Analyze the IPCP Configure-NAK option list, and adjust our 3022 * negotiation. 3023 */ 3024 static void 3025 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3026 { 3027 u_char *buf, *p; 3028 struct ifnet *ifp = &sp->pp_if; 3029 int debug = ifp->if_flags & IFF_DEBUG; 3030 u_long wantaddr; 3031 3032 len -= 4; 3033 buf = malloc (len, M_TEMP, M_NOWAIT); 3034 if (!buf) 3035 return; 3036 3037 if (debug) 3038 log(LOG_DEBUG, SPP_FMT "ipcp nak opts:", 3039 SPP_ARGS(ifp)); 3040 3041 p = (void*) (h+1); 3042 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3043 if (debug) 3044 addlog(" %s", sppp_ipcp_opt_name(*p)); 3045 switch (*p) { 3046 case IPCP_OPT_ADDRESS: 3047 /* 3048 * Peer doesn't like our local IP address. See 3049 * if we can do something for him. We'll drop 3050 * him our address then. 3051 */ 3052 if (len >= 6 && p[1] == 6) { 3053 wantaddr = p[2] << 24 | p[3] << 16 | 3054 p[4] << 8 | p[5]; 3055 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3056 if (debug) 3057 addlog(" [wantaddr %s]", 3058 sppp_dotted_quad(wantaddr)); 3059 /* 3060 * When doing dynamic address assignment, 3061 * we accept his offer. Otherwise, we 3062 * ignore it and thus continue to negotiate 3063 * our already existing value. 3064 */ 3065 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3066 sppp_set_ip_addr(sp, wantaddr); 3067 if (debug) 3068 addlog(" [agree]"); 3069 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3070 } 3071 } 3072 break; 3073 #ifdef notyet 3074 case IPCP_OPT_COMPRESS: 3075 /* 3076 * Peer wants different compression parameters. 3077 */ 3078 break; 3079 #endif 3080 } 3081 } 3082 if (debug) 3083 addlog("\n"); 3084 free (buf, M_TEMP); 3085 return; 3086 } 3087 3088 static void 3089 sppp_ipcp_tlu(struct sppp *sp) 3090 { 3091 /* we are up - notify isdn daemon */ 3092 if (sp->pp_con) 3093 sp->pp_con(sp); 3094 } 3095 3096 static void 3097 sppp_ipcp_tld(struct sppp *sp) 3098 { 3099 } 3100 3101 static void 3102 sppp_ipcp_tls(struct sppp *sp) 3103 { 3104 /* indicate to LCP that it must stay alive */ 3105 sp->lcp.protos |= (1 << IDX_IPCP); 3106 } 3107 3108 static void 3109 sppp_ipcp_tlf(struct sppp *sp) 3110 { 3111 /* we no longer need LCP */ 3112 sp->lcp.protos &= ~(1 << IDX_IPCP); 3113 } 3114 3115 static void 3116 sppp_ipcp_scr(struct sppp *sp) 3117 { 3118 char opt[6 /* compression */ + 6 /* address */]; 3119 u_long ouraddr; 3120 int i = 0; 3121 3122 #ifdef notyet 3123 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3124 opt[i++] = IPCP_OPT_COMPRESSION; 3125 opt[i++] = 6; 3126 opt[i++] = 0; /* VJ header compression */ 3127 opt[i++] = 0x2d; /* VJ header compression */ 3128 opt[i++] = max_slot_id; 3129 opt[i++] = comp_slot_id; 3130 } 3131 #endif 3132 3133 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3134 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3135 opt[i++] = IPCP_OPT_ADDRESS; 3136 opt[i++] = 6; 3137 opt[i++] = ouraddr >> 24; 3138 opt[i++] = ouraddr >> 16; 3139 opt[i++] = ouraddr >> 8; 3140 opt[i++] = ouraddr; 3141 } 3142 3143 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3144 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3145 } 3146 3147 3148 /* 3150 *--------------------------------------------------------------------------* 3151 * * 3152 * The IPv6CP implementation. * 3153 * * 3154 *--------------------------------------------------------------------------* 3155 */ 3156 3157 #ifdef INET6 3158 static void 3159 sppp_ipv6cp_init(struct sppp *sp) 3160 { 3161 sp->ipv6cp.opts = 0; 3162 sp->ipv6cp.flags = 0; 3163 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3164 sp->fail_counter[IDX_IPV6CP] = 0; 3165 sp->pp_seq[IDX_IPV6CP] = 0; 3166 sp->pp_rseq[IDX_IPV6CP] = 0; 3167 #if defined(__NetBSD__) 3168 callout_init(&sp->ch[IDX_IPV6CP]); 3169 #endif 3170 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 3171 callout_handle_init(&sp->ch[IDX_IPV6CP]); 3172 #endif 3173 } 3174 3175 static void 3176 sppp_ipv6cp_up(struct sppp *sp) 3177 { 3178 sppp_up_event(&ipv6cp, sp); 3179 } 3180 3181 static void 3182 sppp_ipv6cp_down(struct sppp *sp) 3183 { 3184 sppp_down_event(&ipv6cp, sp); 3185 } 3186 3187 static void 3188 sppp_ipv6cp_open(struct sppp *sp) 3189 { 3190 STDDCL; 3191 struct in6_addr myaddr, hisaddr; 3192 3193 #ifdef IPV6CP_MYIFID_DYN 3194 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3195 #else 3196 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3197 #endif 3198 3199 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3200 /* 3201 * If we don't have our address, this probably means our 3202 * interface doesn't want to talk IPv6 at all. (This could 3203 * be the case if somebody wants to speak only IPX, for 3204 * example.) Don't open IPv6CP in this case. 3205 */ 3206 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3207 /* XXX this message should go away */ 3208 if (debug) 3209 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n", 3210 SPP_ARGS(ifp)); 3211 return; 3212 } 3213 3214 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3215 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3216 sppp_open_event(&ipv6cp, sp); 3217 } 3218 3219 static void 3220 sppp_ipv6cp_close(struct sppp *sp) 3221 { 3222 sppp_close_event(&ipv6cp, sp); 3223 } 3224 3225 static void 3226 sppp_ipv6cp_TO(void *cookie) 3227 { 3228 sppp_to_event(&ipv6cp, (struct sppp *)cookie); 3229 } 3230 3231 /* 3232 * Analyze a configure request. Return true if it was agreeable, and 3233 * caused action sca, false if it has been rejected or nak'ed, and 3234 * caused action scn. (The return value is used to make the state 3235 * transition decision in the state automaton.) 3236 */ 3237 static int 3238 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3239 { 3240 u_char *buf, *r, *p; 3241 struct ifnet *ifp = &sp->pp_if; 3242 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3243 struct in6_addr myaddr, desiredaddr, suggestaddr; 3244 int ifidcount; 3245 int type; 3246 int collision, nohisaddr; 3247 3248 len -= 4; 3249 origlen = len; 3250 /* 3251 * Make sure to allocate a buf that can at least hold a 3252 * conf-nak with an `address' option. We might need it below. 3253 */ 3254 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 3255 if (! buf) 3256 return (0); 3257 3258 /* pass 1: see if we can recognize them */ 3259 if (debug) 3260 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:", 3261 SPP_ARGS(ifp)); 3262 p = (void*) (h+1); 3263 ifidcount = 0; 3264 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3265 if (debug) 3266 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3267 switch (*p) { 3268 case IPV6CP_OPT_IFID: 3269 if (len >= 10 && p[1] == 10 && ifidcount == 0) { 3270 /* correctly formed address option */ 3271 ifidcount++; 3272 continue; 3273 } 3274 if (debug) 3275 addlog(" [invalid]"); 3276 break; 3277 #ifdef notyet 3278 case IPV6CP_OPT_COMPRESSION: 3279 if (len >= 4 && p[1] >= 4) { 3280 /* correctly formed compress option */ 3281 continue; 3282 } 3283 if (debug) 3284 addlog(" [invalid]"); 3285 break; 3286 #endif 3287 default: 3288 /* Others not supported. */ 3289 if (debug) 3290 addlog(" [rej]"); 3291 break; 3292 } 3293 /* Add the option to rejected list. */ 3294 bcopy (p, r, p[1]); 3295 r += p[1]; 3296 rlen += p[1]; 3297 } 3298 if (rlen) { 3299 if (debug) 3300 addlog(" send conf-rej\n"); 3301 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3302 goto end; 3303 } else if (debug) 3304 addlog("\n"); 3305 3306 /* pass 2: parse option values */ 3307 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3308 if (debug) 3309 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ", 3310 SPP_ARGS(ifp)); 3311 p = (void*) (h+1); 3312 len = origlen; 3313 type = CONF_ACK; 3314 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3315 if (debug) 3316 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3317 switch (*p) { 3318 #ifdef notyet 3319 case IPV6CP_OPT_COMPRESSION: 3320 continue; 3321 #endif 3322 case IPV6CP_OPT_IFID: 3323 bzero(&desiredaddr, sizeof(desiredaddr)); 3324 bcopy(&p[2], &desiredaddr.s6_addr[8], 8); 3325 collision = (bcmp(&desiredaddr.s6_addr[8], 3326 &myaddr.s6_addr[8], 8) == 0); 3327 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3328 3329 desiredaddr.s6_addr16[0] = htons(0xfe80); 3330 desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3331 3332 if (!collision && !nohisaddr) { 3333 /* no collision, hisaddr known - Conf-Ack */ 3334 type = CONF_ACK; 3335 3336 if (debug) { 3337 addlog(" %s [%s]", 3338 ip6_sprintf(&desiredaddr), 3339 sppp_cp_type_name(type)); 3340 } 3341 continue; 3342 } 3343 3344 bzero(&suggestaddr, sizeof(&suggestaddr)); 3345 if (collision && nohisaddr) { 3346 /* collision, hisaddr unknown - Conf-Rej */ 3347 type = CONF_REJ; 3348 bzero(&p[2], 8); 3349 } else { 3350 /* 3351 * - no collision, hisaddr unknown, or 3352 * - collision, hisaddr known 3353 * Conf-Nak, suggest hisaddr 3354 */ 3355 type = CONF_NAK; 3356 sppp_suggest_ip6_addr(sp, &suggestaddr); 3357 bcopy(&suggestaddr.s6_addr[8], &p[2], 8); 3358 } 3359 if (debug) 3360 addlog(" %s [%s]", ip6_sprintf(&desiredaddr), 3361 sppp_cp_type_name(type)); 3362 break; 3363 } 3364 /* Add the option to nak'ed list. */ 3365 bcopy (p, r, p[1]); 3366 r += p[1]; 3367 rlen += p[1]; 3368 } 3369 3370 if (rlen == 0 && type == CONF_ACK) { 3371 if (debug) 3372 addlog(" send %s\n", sppp_cp_type_name(type)); 3373 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1); 3374 } else { 3375 #ifdef DIAGNOSTIC 3376 if (type == CONF_ACK) 3377 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3378 #endif 3379 3380 if (debug) { 3381 addlog(" send %s suggest %s\n", 3382 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr)); 3383 } 3384 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3385 } 3386 3387 end: 3388 free (buf, M_TEMP); 3389 return (rlen == 0); 3390 } 3391 3392 /* 3393 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3394 * negotiation. 3395 */ 3396 static void 3397 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3398 { 3399 u_char *buf, *p; 3400 struct ifnet *ifp = &sp->pp_if; 3401 int debug = ifp->if_flags & IFF_DEBUG; 3402 3403 len -= 4; 3404 buf = malloc (len, M_TEMP, M_NOWAIT); 3405 if (!buf) 3406 return; 3407 3408 if (debug) 3409 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:", 3410 SPP_ARGS(ifp)); 3411 3412 p = (void*) (h+1); 3413 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3414 if (debug) 3415 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3416 switch (*p) { 3417 case IPV6CP_OPT_IFID: 3418 /* 3419 * Peer doesn't grok address option. This is 3420 * bad. XXX Should we better give up here? 3421 */ 3422 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3423 break; 3424 #ifdef notyet 3425 case IPV6CP_OPT_COMPRESS: 3426 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3427 break; 3428 #endif 3429 } 3430 } 3431 if (debug) 3432 addlog("\n"); 3433 free (buf, M_TEMP); 3434 return; 3435 } 3436 3437 /* 3438 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3439 * negotiation. 3440 */ 3441 static void 3442 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3443 { 3444 u_char *buf, *p; 3445 struct ifnet *ifp = &sp->pp_if; 3446 int debug = ifp->if_flags & IFF_DEBUG; 3447 struct in6_addr suggestaddr; 3448 3449 len -= 4; 3450 buf = malloc (len, M_TEMP, M_NOWAIT); 3451 if (!buf) 3452 return; 3453 3454 if (debug) 3455 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:", 3456 SPP_ARGS(ifp)); 3457 3458 p = (void*) (h+1); 3459 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3460 if (debug) 3461 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3462 switch (*p) { 3463 case IPV6CP_OPT_IFID: 3464 /* 3465 * Peer doesn't like our local ifid. See 3466 * if we can do something for him. We'll drop 3467 * him our address then. 3468 */ 3469 if (len < 10 || p[1] != 10) 3470 break; 3471 bzero(&suggestaddr, sizeof(suggestaddr)); 3472 suggestaddr.s6_addr16[0] = htons(0xfe80); 3473 suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3474 bcopy(&p[2], &suggestaddr.s6_addr[8], 8); 3475 3476 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3477 if (debug) 3478 addlog(" [suggestaddr %s]", 3479 ip6_sprintf(&suggestaddr)); 3480 #ifdef IPV6CP_MYIFID_DYN 3481 /* 3482 * When doing dynamic address assignment, 3483 * we accept his offer. 3484 */ 3485 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3486 struct in6_addr lastsuggest; 3487 /* 3488 * If <suggested myaddr from peer> equals to 3489 * <hisaddr we have suggested last time>, 3490 * we have a collision. generate new random 3491 * ifid. 3492 */ 3493 sppp_suggest_ip6_addr(&lastsuggest); 3494 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3495 lastsuggest)) { 3496 if (debug) 3497 addlog(" [random]"); 3498 sppp_gen_ip6_addr(sp, &suggestaddr); 3499 } 3500 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3501 if (debug) 3502 addlog(" [agree]"); 3503 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3504 } 3505 #else 3506 /* 3507 * Since we do not do dynamic address assignment, 3508 * we ignore it and thus continue to negotiate 3509 * our already existing value. This can possibly 3510 * go into infinite request-reject loop. 3511 * 3512 * This is not likely because we normally use 3513 * ifid based on MAC-address. 3514 * If you have no ethernet card on the node, too bad. 3515 * XXX should we use fail_counter? 3516 */ 3517 #endif 3518 break; 3519 #ifdef notyet 3520 case IPV6CP_OPT_COMPRESS: 3521 /* 3522 * Peer wants different compression parameters. 3523 */ 3524 break; 3525 #endif 3526 } 3527 } 3528 if (debug) 3529 addlog("\n"); 3530 free (buf, M_TEMP); 3531 return; 3532 } 3533 3534 static void 3535 sppp_ipv6cp_tlu(struct sppp *sp) 3536 { 3537 /* we are up - notify isdn daemon */ 3538 if (sp->pp_con) 3539 sp->pp_con(sp); 3540 } 3541 3542 static void 3543 sppp_ipv6cp_tld(struct sppp *sp) 3544 { 3545 } 3546 3547 static void 3548 sppp_ipv6cp_tls(struct sppp *sp) 3549 { 3550 /* indicate to LCP that it must stay alive */ 3551 sp->lcp.protos |= (1 << IDX_IPV6CP); 3552 } 3553 3554 static void 3555 sppp_ipv6cp_tlf(struct sppp *sp) 3556 { 3557 /* we no longer need LCP */ 3558 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3559 } 3560 3561 static void 3562 sppp_ipv6cp_scr(struct sppp *sp) 3563 { 3564 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3565 struct in6_addr ouraddr; 3566 int i = 0; 3567 3568 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3569 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3570 opt[i++] = IPV6CP_OPT_IFID; 3571 opt[i++] = 10; 3572 bcopy(&ouraddr.s6_addr[8], &opt[i], 8); 3573 i += 8; 3574 } 3575 3576 #ifdef notyet 3577 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 3578 opt[i++] = IPV6CP_OPT_COMPRESSION; 3579 opt[i++] = 4; 3580 opt[i++] = 0; /* TBD */ 3581 opt[i++] = 0; /* TBD */ 3582 /* variable length data may follow */ 3583 } 3584 #endif 3585 3586 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 3587 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 3588 } 3589 #else /*INET6*/ 3590 static void sppp_ipv6cp_init(struct sppp *sp) 3591 { 3592 } 3593 3594 static void sppp_ipv6cp_up(struct sppp *sp) 3595 { 3596 } 3597 3598 static void sppp_ipv6cp_down(struct sppp *sp) 3599 { 3600 } 3601 3602 3603 static void sppp_ipv6cp_open(struct sppp *sp) 3604 { 3605 } 3606 3607 static void sppp_ipv6cp_close(struct sppp *sp) 3608 { 3609 } 3610 3611 static void sppp_ipv6cp_TO(void *sp) 3612 { 3613 } 3614 3615 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3616 { 3617 return 0; 3618 } 3619 3620 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3621 { 3622 } 3623 3624 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3625 { 3626 } 3627 3628 static void sppp_ipv6cp_tlu(struct sppp *sp) 3629 { 3630 } 3631 3632 static void sppp_ipv6cp_tld(struct sppp *sp) 3633 { 3634 } 3635 3636 static void sppp_ipv6cp_tls(struct sppp *sp) 3637 { 3638 } 3639 3640 static void sppp_ipv6cp_tlf(struct sppp *sp) 3641 { 3642 } 3643 3644 static void sppp_ipv6cp_scr(struct sppp *sp) 3645 { 3646 } 3647 #endif /*INET6*/ 3648 3649 3650 /* 3652 *--------------------------------------------------------------------------* 3653 * * 3654 * The CHAP implementation. * 3655 * * 3656 *--------------------------------------------------------------------------* 3657 */ 3658 3659 /* 3660 * The authentication protocols don't employ a full-fledged state machine as 3661 * the control protocols do, since they do have Open and Close events, but 3662 * not Up and Down, nor are they explicitly terminated. Also, use of the 3663 * authentication protocols may be different in both directions (this makes 3664 * sense, think of a machine that never accepts incoming calls but only 3665 * calls out, it doesn't require the called party to authenticate itself). 3666 * 3667 * Our state machine for the local authentication protocol (we are requesting 3668 * the peer to authenticate) looks like: 3669 * 3670 * RCA- 3671 * +--------------------------------------------+ 3672 * V scn,tld| 3673 * +--------+ Close +---------+ RCA+ 3674 * | |<----------------------------------| |------+ 3675 * +--->| Closed | TO* | Opened | sca | 3676 * | | |-----+ +-------| |<-----+ 3677 * | +--------+ irc | | +---------+ 3678 * | ^ | | ^ 3679 * | | | | | 3680 * | | | | | 3681 * | TO-| | | | 3682 * | |tld TO+ V | | 3683 * | | +------->+ | | 3684 * | | | | | | 3685 * | +--------+ V | | 3686 * | | |<----+<--------------------+ | 3687 * | | Req- | scr | 3688 * | | Sent | | 3689 * | | | | 3690 * | +--------+ | 3691 * | RCA- | | RCA+ | 3692 * +------+ +------------------------------------------+ 3693 * scn,tld sca,irc,ict,tlu 3694 * 3695 * 3696 * with: 3697 * 3698 * Open: LCP reached authentication phase 3699 * Close: LCP reached terminate phase 3700 * 3701 * RCA+: received reply (pap-req, chap-response), acceptable 3702 * RCN: received reply (pap-req, chap-response), not acceptable 3703 * TO+: timeout with restart counter >= 0 3704 * TO-: timeout with restart counter < 0 3705 * TO*: reschedule timeout for CHAP 3706 * 3707 * scr: send request packet (none for PAP, chap-challenge) 3708 * sca: send ack packet (pap-ack, chap-success) 3709 * scn: send nak packet (pap-nak, chap-failure) 3710 * ict: initialize re-challenge timer (CHAP only) 3711 * 3712 * tlu: this-layer-up, LCP reaches network phase 3713 * tld: this-layer-down, LCP enters terminate phase 3714 * 3715 * Note that in CHAP mode, after sending a new challenge, while the state 3716 * automaton falls back into Req-Sent state, it doesn't signal a tld 3717 * event to LCP, so LCP remains in network phase. Only after not getting 3718 * any response (or after getting an unacceptable response), CHAP closes, 3719 * causing LCP to enter terminate phase. 3720 * 3721 * With PAP, there is no initial request that can be sent. The peer is 3722 * expected to send one based on the successful negotiation of PAP as 3723 * the authentication protocol during the LCP option negotiation. 3724 * 3725 * Incoming authentication protocol requests (remote requests 3726 * authentication, we are peer) don't employ a state machine at all, 3727 * they are simply answered. Some peers [Ascend P50 firmware rev 3728 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 3729 * still in authentication phase (thereby violating the standard that 3730 * demands that these NCP packets are to be discarded), so we keep 3731 * track of the peer demanding us to authenticate, and only proceed to 3732 * phase network once we've seen a positive acknowledge for the 3733 * authentication. 3734 */ 3735 3736 /* 3737 * Handle incoming CHAP packets. 3738 */ 3739 void 3740 sppp_chap_input(struct sppp *sp, struct mbuf *m) 3741 { 3742 STDDCL; 3743 struct lcp_header *h; 3744 int len, x; 3745 u_char *value, *name, digest[AUTHKEYLEN], dsize; 3746 int value_len, name_len; 3747 MD5_CTX ctx; 3748 3749 len = m->m_pkthdr.len; 3750 if (len < 4) { 3751 if (debug) 3752 log(LOG_DEBUG, 3753 SPP_FMT "chap invalid packet length: %d bytes\n", 3754 SPP_ARGS(ifp), len); 3755 return; 3756 } 3757 h = mtod (m, struct lcp_header*); 3758 if (len > ntohs (h->len)) 3759 len = ntohs (h->len); 3760 3761 switch (h->type) { 3762 /* challenge, failure and success are his authproto */ 3763 case CHAP_CHALLENGE: 3764 value = 1 + (u_char*)(h+1); 3765 value_len = value[-1]; 3766 name = value + value_len; 3767 name_len = len - value_len - 5; 3768 if (name_len < 0) { 3769 if (debug) { 3770 log(LOG_DEBUG, 3771 SPP_FMT "chap corrupted challenge " 3772 "<%s id=0x%x len=%d", 3773 SPP_ARGS(ifp), 3774 sppp_auth_type_name(PPP_CHAP, h->type), 3775 h->ident, ntohs(h->len)); 3776 if (len > 4) 3777 sppp_print_bytes((u_char*) (h+1), len-4); 3778 addlog(">\n"); 3779 } 3780 break; 3781 } 3782 3783 if (debug) { 3784 log(LOG_DEBUG, 3785 SPP_FMT "chap input <%s id=0x%x len=%d name=", 3786 SPP_ARGS(ifp), 3787 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 3788 ntohs(h->len)); 3789 sppp_print_string((char*) name, name_len); 3790 addlog(" value-size=%d value=", value_len); 3791 sppp_print_bytes(value, value_len); 3792 addlog(">\n"); 3793 } 3794 3795 /* Compute reply value. */ 3796 MD5Init(&ctx); 3797 MD5Update(&ctx, &h->ident, 1); 3798 MD5Update(&ctx, sp->myauth.secret, 3799 sppp_strnlen(sp->myauth.secret, AUTHKEYLEN)); 3800 MD5Update(&ctx, value, value_len); 3801 MD5Final(digest, &ctx); 3802 dsize = sizeof digest; 3803 3804 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 3805 sizeof dsize, (const char *)&dsize, 3806 sizeof digest, digest, 3807 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN), 3808 sp->myauth.name, 3809 0); 3810 break; 3811 3812 case CHAP_SUCCESS: 3813 if (debug) { 3814 log(LOG_DEBUG, SPP_FMT "chap success", 3815 SPP_ARGS(ifp)); 3816 if (len > 4) { 3817 addlog(": "); 3818 sppp_print_string((char*)(h + 1), len - 4); 3819 } 3820 addlog("\n"); 3821 } 3822 x = splimp(); 3823 sp->pp_flags &= ~PP_NEEDAUTH; 3824 if (sp->myauth.proto == PPP_CHAP && 3825 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 3826 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 3827 /* 3828 * We are authenticator for CHAP but didn't 3829 * complete yet. Leave it to tlu to proceed 3830 * to network phase. 3831 */ 3832 splx(x); 3833 break; 3834 } 3835 splx(x); 3836 sppp_phase_network(sp); 3837 break; 3838 3839 case CHAP_FAILURE: 3840 if (debug) { 3841 log(LOG_INFO, SPP_FMT "chap failure", 3842 SPP_ARGS(ifp)); 3843 if (len > 4) { 3844 addlog(": "); 3845 sppp_print_string((char*)(h + 1), len - 4); 3846 } 3847 addlog("\n"); 3848 } else 3849 log(LOG_INFO, SPP_FMT "chap failure\n", 3850 SPP_ARGS(ifp)); 3851 /* await LCP shutdown by authenticator */ 3852 break; 3853 3854 /* response is my authproto */ 3855 case CHAP_RESPONSE: 3856 value = 1 + (u_char*)(h+1); 3857 value_len = value[-1]; 3858 name = value + value_len; 3859 name_len = len - value_len - 5; 3860 if (name_len < 0) { 3861 if (debug) { 3862 log(LOG_DEBUG, 3863 SPP_FMT "chap corrupted response " 3864 "<%s id=0x%x len=%d", 3865 SPP_ARGS(ifp), 3866 sppp_auth_type_name(PPP_CHAP, h->type), 3867 h->ident, ntohs(h->len)); 3868 if (len > 4) 3869 sppp_print_bytes((u_char*)(h+1), len-4); 3870 addlog(">\n"); 3871 } 3872 break; 3873 } 3874 if (h->ident != sp->confid[IDX_CHAP]) { 3875 if (debug) 3876 log(LOG_DEBUG, 3877 SPP_FMT "chap dropping response for old ID " 3878 "(got %d, expected %d)\n", 3879 SPP_ARGS(ifp), 3880 h->ident, sp->confid[IDX_CHAP]); 3881 break; 3882 } 3883 if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN) 3884 || bcmp(name, sp->hisauth.name, name_len) != 0) { 3885 log(LOG_INFO, SPP_FMT "chap response, his name ", 3886 SPP_ARGS(ifp)); 3887 sppp_print_string(name, name_len); 3888 addlog(" != expected "); 3889 sppp_print_string(sp->hisauth.name, 3890 sppp_strnlen(sp->hisauth.name, AUTHNAMELEN)); 3891 addlog("\n"); 3892 } 3893 if (debug) { 3894 log(LOG_DEBUG, SPP_FMT "chap input(%s) " 3895 "<%s id=0x%x len=%d name=", 3896 SPP_ARGS(ifp), 3897 sppp_state_name(sp->state[IDX_CHAP]), 3898 sppp_auth_type_name(PPP_CHAP, h->type), 3899 h->ident, ntohs (h->len)); 3900 sppp_print_string((char*)name, name_len); 3901 addlog(" value-size=%d value=", value_len); 3902 sppp_print_bytes(value, value_len); 3903 addlog(">\n"); 3904 } 3905 if (value_len != AUTHKEYLEN) { 3906 if (debug) 3907 log(LOG_DEBUG, 3908 SPP_FMT "chap bad hash value length: " 3909 "%d bytes, should be %d\n", 3910 SPP_ARGS(ifp), value_len, 3911 AUTHKEYLEN); 3912 break; 3913 } 3914 3915 MD5Init(&ctx); 3916 MD5Update(&ctx, &h->ident, 1); 3917 MD5Update(&ctx, sp->hisauth.secret, 3918 sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN)); 3919 MD5Update(&ctx, sp->myauth.challenge, AUTHKEYLEN); 3920 MD5Final(digest, &ctx); 3921 3922 #define FAILMSG "Failed..." 3923 #define SUCCMSG "Welcome!" 3924 3925 if (value_len != sizeof digest || 3926 bcmp(digest, value, value_len) != 0) { 3927 /* action scn, tld */ 3928 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 3929 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 3930 0); 3931 chap.tld(sp); 3932 break; 3933 } 3934 /* action sca, perhaps tlu */ 3935 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 3936 sp->state[IDX_CHAP] == STATE_OPENED) 3937 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 3938 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 3939 0); 3940 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 3941 sppp_cp_change_state(&chap, sp, STATE_OPENED); 3942 chap.tlu(sp); 3943 } 3944 break; 3945 3946 default: 3947 /* Unknown CHAP packet type -- ignore. */ 3948 if (debug) { 3949 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) " 3950 "<0x%x id=0x%xh len=%d", 3951 SPP_ARGS(ifp), 3952 sppp_state_name(sp->state[IDX_CHAP]), 3953 h->type, h->ident, ntohs(h->len)); 3954 if (len > 4) 3955 sppp_print_bytes((u_char*)(h+1), len-4); 3956 addlog(">\n"); 3957 } 3958 break; 3959 3960 } 3961 } 3962 3963 static void 3964 sppp_chap_init(struct sppp *sp) 3965 { 3966 /* Chap doesn't have STATE_INITIAL at all. */ 3967 sp->state[IDX_CHAP] = STATE_CLOSED; 3968 sp->fail_counter[IDX_CHAP] = 0; 3969 sp->pp_seq[IDX_CHAP] = 0; 3970 sp->pp_rseq[IDX_CHAP] = 0; 3971 #if defined(__NetBSD__) 3972 callout_init(&sp->ch[IDX_CHAP]); 3973 #endif 3974 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 3975 callout_handle_init(&sp->ch[IDX_CHAP]); 3976 #endif 3977 } 3978 3979 static void 3980 sppp_chap_open(struct sppp *sp) 3981 { 3982 if (sp->myauth.proto == PPP_CHAP && 3983 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 3984 /* we are authenticator for CHAP, start it */ 3985 chap.scr(sp); 3986 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 3987 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 3988 } 3989 /* nothing to be done if we are peer, await a challenge */ 3990 } 3991 3992 static void 3993 sppp_chap_close(struct sppp *sp) 3994 { 3995 if (sp->state[IDX_CHAP] != STATE_CLOSED) 3996 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 3997 } 3998 3999 static void 4000 sppp_chap_TO(void *cookie) 4001 { 4002 struct sppp *sp = (struct sppp *)cookie; 4003 STDDCL; 4004 int s; 4005 4006 s = splimp(); 4007 if (debug) 4008 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n", 4009 SPP_ARGS(ifp), 4010 sppp_state_name(sp->state[IDX_CHAP]), 4011 sp->rst_counter[IDX_CHAP]); 4012 4013 if (--sp->rst_counter[IDX_CHAP] < 0) 4014 /* TO- event */ 4015 switch (sp->state[IDX_CHAP]) { 4016 case STATE_REQ_SENT: 4017 chap.tld(sp); 4018 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4019 break; 4020 } 4021 else 4022 /* TO+ (or TO*) event */ 4023 switch (sp->state[IDX_CHAP]) { 4024 case STATE_OPENED: 4025 /* TO* event */ 4026 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4027 /* fall through */ 4028 case STATE_REQ_SENT: 4029 chap.scr(sp); 4030 /* sppp_cp_change_state() will restart the timer */ 4031 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4032 break; 4033 } 4034 4035 splx(s); 4036 } 4037 4038 static void 4039 sppp_chap_tlu(struct sppp *sp) 4040 { 4041 STDDCL; 4042 int i, x; 4043 4044 i = 0; 4045 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4046 4047 /* 4048 * Some broken CHAP implementations (Conware CoNet, firmware 4049 * 4.0.?) don't want to re-authenticate their CHAP once the 4050 * initial challenge-response exchange has taken place. 4051 * Provide for an option to avoid rechallenges. 4052 */ 4053 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0) { 4054 /* 4055 * Compute the re-challenge timeout. This will yield 4056 * a number between 300 and 810 seconds. 4057 */ 4058 i = 300 + ((unsigned)(random() & 0xff00) >> 7); 4059 4060 #if defined(__NetBSD__) 4061 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4062 #else 4063 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4064 sp->ch[IDX_CHAP] = 4065 #endif 4066 timeout(chap.TO, (void *)sp, i * hz); 4067 #endif /* __NetBSD__ */ 4068 } 4069 4070 if (debug) { 4071 log(LOG_DEBUG, 4072 SPP_FMT "chap %s, ", 4073 SPP_ARGS(ifp), 4074 sp->pp_phase == PHASE_NETWORK? "reconfirmed": "tlu"); 4075 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0) 4076 addlog("next re-challenge in %d seconds\n", i); 4077 else 4078 addlog("re-challenging supressed\n"); 4079 } 4080 4081 x = splimp(); 4082 /* indicate to LCP that we need to be closed down */ 4083 sp->lcp.protos |= (1 << IDX_CHAP); 4084 4085 if (sp->pp_flags & PP_NEEDAUTH) { 4086 /* 4087 * Remote is authenticator, but his auth proto didn't 4088 * complete yet. Defer the transition to network 4089 * phase. 4090 */ 4091 splx(x); 4092 return; 4093 } 4094 splx(x); 4095 4096 /* 4097 * If we are already in phase network, we are done here. This 4098 * is the case if this is a dummy tlu event after a re-challenge. 4099 */ 4100 if (sp->pp_phase != PHASE_NETWORK) 4101 sppp_phase_network(sp); 4102 } 4103 4104 static void 4105 sppp_chap_tld(struct sppp *sp) 4106 { 4107 STDDCL; 4108 4109 if (debug) 4110 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp)); 4111 #if defined(__NetBSD__) 4112 callout_stop(&sp->ch[IDX_CHAP]); 4113 #else 4114 untimeout(chap.TO, (void *)sp 4115 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4116 , sp->ch[IDX_CHAP] 4117 #endif 4118 ); 4119 #endif /* __NetBSD__ */ 4120 sp->lcp.protos &= ~(1 << IDX_CHAP); 4121 4122 lcp.Close(sp); 4123 } 4124 4125 static void 4126 sppp_chap_scr(struct sppp *sp) 4127 { 4128 struct timeval tv; 4129 u_long *ch, seed; 4130 u_char clen; 4131 4132 /* Compute random challenge. */ 4133 ch = (u_long *)sp->myauth.challenge; 4134 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4135 read_random(&seed, sizeof seed); 4136 #else 4137 microtime(&tv); 4138 seed = tv.tv_sec ^ tv.tv_usec; 4139 #endif 4140 ch[0] = seed ^ random(); 4141 ch[1] = seed ^ random(); 4142 ch[2] = seed ^ random(); 4143 ch[3] = seed ^ random(); 4144 clen = AUTHKEYLEN; 4145 4146 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4147 4148 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4149 sizeof clen, (const char *)&clen, 4150 (size_t)AUTHKEYLEN, sp->myauth.challenge, 4151 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN), 4152 sp->myauth.name, 4153 0); 4154 } 4155 /* 4157 *--------------------------------------------------------------------------* 4158 * * 4159 * The PAP implementation. * 4160 * * 4161 *--------------------------------------------------------------------------* 4162 */ 4163 /* 4164 * For PAP, we need to keep a little state also if we are the peer, not the 4165 * authenticator. This is since we don't get a request to authenticate, but 4166 * have to repeatedly authenticate ourself until we got a response (or the 4167 * retry counter is expired). 4168 */ 4169 4170 /* 4171 * Handle incoming PAP packets. */ 4172 static void 4173 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4174 { 4175 STDDCL; 4176 struct lcp_header *h; 4177 int len, x; 4178 u_char *name, *passwd, mlen; 4179 int name_len, passwd_len; 4180 4181 len = m->m_pkthdr.len; 4182 if (len < 5) { 4183 if (debug) 4184 log(LOG_DEBUG, 4185 SPP_FMT "pap invalid packet length: %d bytes\n", 4186 SPP_ARGS(ifp), len); 4187 return; 4188 } 4189 h = mtod (m, struct lcp_header*); 4190 if (len > ntohs (h->len)) 4191 len = ntohs (h->len); 4192 switch (h->type) { 4193 /* PAP request is my authproto */ 4194 case PAP_REQ: 4195 name = 1 + (u_char*)(h+1); 4196 name_len = name[-1]; 4197 passwd = name + name_len + 1; 4198 if (name_len > len - 6 || 4199 (passwd_len = passwd[-1]) > len - 6 - name_len) { 4200 if (debug) { 4201 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4202 "<%s id=0x%x len=%d", 4203 SPP_ARGS(ifp), 4204 sppp_auth_type_name(PPP_PAP, h->type), 4205 h->ident, ntohs(h->len)); 4206 if (len > 4) 4207 sppp_print_bytes((u_char*)(h+1), len-4); 4208 addlog(">\n"); 4209 } 4210 break; 4211 } 4212 if (debug) { 4213 log(LOG_DEBUG, SPP_FMT "pap input(%s) " 4214 "<%s id=0x%x len=%d name=", 4215 SPP_ARGS(ifp), 4216 sppp_state_name(sp->state[IDX_PAP]), 4217 sppp_auth_type_name(PPP_PAP, h->type), 4218 h->ident, ntohs(h->len)); 4219 sppp_print_string((char*)name, name_len); 4220 addlog(" passwd="); 4221 sppp_print_string((char*)passwd, passwd_len); 4222 addlog(">\n"); 4223 } 4224 if (name_len > AUTHNAMELEN || 4225 passwd_len > AUTHKEYLEN || 4226 bcmp(name, sp->hisauth.name, name_len) != 0 || 4227 bcmp(passwd, sp->hisauth.secret, passwd_len) != 0) { 4228 /* action scn, tld */ 4229 mlen = sizeof(FAILMSG) - 1; 4230 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4231 sizeof mlen, (const char *)&mlen, 4232 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 4233 0); 4234 pap.tld(sp); 4235 break; 4236 } 4237 /* action sca, perhaps tlu */ 4238 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4239 sp->state[IDX_PAP] == STATE_OPENED) { 4240 mlen = sizeof(SUCCMSG) - 1; 4241 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4242 sizeof mlen, (const char *)&mlen, 4243 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 4244 0); 4245 } 4246 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4247 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4248 pap.tlu(sp); 4249 } 4250 break; 4251 4252 /* ack and nak are his authproto */ 4253 case PAP_ACK: 4254 #if defined(__NetBSD__) 4255 callout_stop(&sp->pap_my_to_ch); 4256 #else 4257 untimeout(sppp_pap_my_TO, (void *)sp 4258 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4259 , sp->pap_my_to_ch 4260 #endif 4261 ); 4262 #endif /* __NetBSD__ */ 4263 if (debug) { 4264 log(LOG_DEBUG, SPP_FMT "pap success", 4265 SPP_ARGS(ifp)); 4266 name_len = *((char *)h); 4267 if (len > 5 && name_len) { 4268 addlog(": "); 4269 sppp_print_string((char*)(h+1), name_len); 4270 } 4271 addlog("\n"); 4272 } 4273 x = splimp(); 4274 sp->pp_flags &= ~PP_NEEDAUTH; 4275 if (sp->myauth.proto == PPP_PAP && 4276 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4277 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4278 /* 4279 * We are authenticator for PAP but didn't 4280 * complete yet. Leave it to tlu to proceed 4281 * to network phase. 4282 */ 4283 splx(x); 4284 break; 4285 } 4286 splx(x); 4287 sppp_phase_network(sp); 4288 break; 4289 4290 case PAP_NAK: 4291 #if defined(__NetBSD__) 4292 callout_stop(&sp->pap_my_to_ch); 4293 #else 4294 untimeout(sppp_pap_my_TO, (void *)sp 4295 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4296 , sp->pap_my_to_ch 4297 #endif 4298 ); 4299 #endif /* __NetBSD__ */ 4300 if (debug) { 4301 log(LOG_INFO, SPP_FMT "pap failure", 4302 SPP_ARGS(ifp)); 4303 name_len = *((char *)h); 4304 if (len > 5 && name_len) { 4305 addlog(": "); 4306 sppp_print_string((char*)(h+1), name_len); 4307 } 4308 addlog("\n"); 4309 } else 4310 log(LOG_INFO, SPP_FMT "pap failure\n", 4311 SPP_ARGS(ifp)); 4312 /* await LCP shutdown by authenticator */ 4313 break; 4314 4315 default: 4316 /* Unknown PAP packet type -- ignore. */ 4317 if (debug) { 4318 log(LOG_DEBUG, SPP_FMT "pap corrupted input " 4319 "<0x%x id=0x%x len=%d", 4320 SPP_ARGS(ifp), 4321 h->type, h->ident, ntohs(h->len)); 4322 if (len > 4) 4323 sppp_print_bytes((u_char*)(h+1), len-4); 4324 addlog(">\n"); 4325 } 4326 break; 4327 4328 } 4329 } 4330 4331 static void 4332 sppp_pap_init(struct sppp *sp) 4333 { 4334 /* PAP doesn't have STATE_INITIAL at all. */ 4335 sp->state[IDX_PAP] = STATE_CLOSED; 4336 sp->fail_counter[IDX_PAP] = 0; 4337 sp->pp_seq[IDX_PAP] = 0; 4338 sp->pp_rseq[IDX_PAP] = 0; 4339 #if defined(__NetBSD__) 4340 callout_init(&sp->ch[IDX_PAP]); 4341 callout_init(&sp->pap_my_to_ch); 4342 #endif 4343 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4344 callout_handle_init(&sp->ch[IDX_PAP]); 4345 callout_handle_init(&sp->pap_my_to_ch); 4346 #endif 4347 } 4348 4349 static void 4350 sppp_pap_open(struct sppp *sp) 4351 { 4352 if (sp->hisauth.proto == PPP_PAP && 4353 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4354 /* we are authenticator for PAP, start our timer */ 4355 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4356 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4357 } 4358 if (sp->myauth.proto == PPP_PAP) { 4359 /* we are peer, send a request, and start a timer */ 4360 pap.scr(sp); 4361 #if defined(__NetBSD__) 4362 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4363 sppp_pap_my_TO, sp); 4364 #else 4365 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4366 sp->pap_my_to_ch = 4367 #endif 4368 timeout(sppp_pap_my_TO, (void *)sp, sp->lcp.timeout); 4369 #endif /* __NetBSD__ */ 4370 } 4371 } 4372 4373 static void 4374 sppp_pap_close(struct sppp *sp) 4375 { 4376 if (sp->state[IDX_PAP] != STATE_CLOSED) 4377 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4378 } 4379 4380 /* 4381 * That's the timeout routine if we are authenticator. Since the 4382 * authenticator is basically passive in PAP, we can't do much here. 4383 */ 4384 static void 4385 sppp_pap_TO(void *cookie) 4386 { 4387 struct sppp *sp = (struct sppp *)cookie; 4388 STDDCL; 4389 int s; 4390 4391 s = splimp(); 4392 if (debug) 4393 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n", 4394 SPP_ARGS(ifp), 4395 sppp_state_name(sp->state[IDX_PAP]), 4396 sp->rst_counter[IDX_PAP]); 4397 4398 if (--sp->rst_counter[IDX_PAP] < 0) 4399 /* TO- event */ 4400 switch (sp->state[IDX_PAP]) { 4401 case STATE_REQ_SENT: 4402 pap.tld(sp); 4403 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4404 break; 4405 } 4406 else 4407 /* TO+ event, not very much we could do */ 4408 switch (sp->state[IDX_PAP]) { 4409 case STATE_REQ_SENT: 4410 /* sppp_cp_change_state() will restart the timer */ 4411 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4412 break; 4413 } 4414 4415 splx(s); 4416 } 4417 4418 /* 4419 * That's the timeout handler if we are peer. Since the peer is active, 4420 * we need to retransmit our PAP request since it is apparently lost. 4421 * XXX We should impose a max counter. 4422 */ 4423 static void 4424 sppp_pap_my_TO(void *cookie) 4425 { 4426 struct sppp *sp = (struct sppp *)cookie; 4427 STDDCL; 4428 4429 if (debug) 4430 log(LOG_DEBUG, SPP_FMT "pap peer TO\n", 4431 SPP_ARGS(ifp)); 4432 4433 pap.scr(sp); 4434 } 4435 4436 static void 4437 sppp_pap_tlu(struct sppp *sp) 4438 { 4439 STDDCL; 4440 int x; 4441 4442 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4443 4444 if (debug) 4445 log(LOG_DEBUG, SPP_FMT "%s tlu\n", 4446 SPP_ARGS(ifp), pap.name); 4447 4448 x = splimp(); 4449 /* indicate to LCP that we need to be closed down */ 4450 sp->lcp.protos |= (1 << IDX_PAP); 4451 4452 if (sp->pp_flags & PP_NEEDAUTH) { 4453 /* 4454 * Remote is authenticator, but his auth proto didn't 4455 * complete yet. Defer the transition to network 4456 * phase. 4457 */ 4458 splx(x); 4459 return; 4460 } 4461 splx(x); 4462 sppp_phase_network(sp); 4463 } 4464 4465 static void 4466 sppp_pap_tld(struct sppp *sp) 4467 { 4468 STDDCL; 4469 4470 if (debug) 4471 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp)); 4472 #if defined(__NetBSD__) 4473 callout_stop(&sp->ch[IDX_PAP]); 4474 #else 4475 untimeout(pap.TO, (void *)sp 4476 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4477 , sp->ch[IDX_PAP] 4478 #endif 4479 ); 4480 #endif /* __NetBSD__ */ 4481 4482 #if defined(__NetBSD__) 4483 callout_stop(&sp->pap_my_to_ch); 4484 #else 4485 untimeout(sppp_pap_my_TO, (void *)sp 4486 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4487 , sp->pap_my_to_ch 4488 #endif 4489 ); 4490 #endif /* __NetBSD__ */ 4491 sp->lcp.protos &= ~(1 << IDX_PAP); 4492 4493 lcp.Close(sp); 4494 } 4495 4496 static void 4497 sppp_pap_scr(struct sppp *sp) 4498 { 4499 u_char idlen, pwdlen; 4500 4501 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4502 pwdlen = sppp_strnlen(sp->myauth.secret, AUTHKEYLEN); 4503 idlen = sppp_strnlen(sp->myauth.name, AUTHNAMELEN); 4504 4505 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 4506 sizeof idlen, (const char *)&idlen, 4507 (size_t)idlen, sp->myauth.name, 4508 sizeof pwdlen, (const char *)&pwdlen, 4509 (size_t)pwdlen, sp->myauth.secret, 4510 0); 4511 } 4512 /* 4514 * Random miscellaneous functions. 4515 */ 4516 4517 /* 4518 * Send a PAP or CHAP proto packet. 4519 * 4520 * Varadic function, each of the elements for the ellipsis is of type 4521 * ``size_t mlen, const u_char *msg''. Processing will stop iff 4522 * mlen == 0. 4523 * NOTE: never declare variadic functions with types subject to type 4524 * promotion (i.e. u_char). This is asking for big trouble depending 4525 * on the architecture you are on... 4526 */ 4527 4528 static void 4529 sppp_auth_send(const struct cp *cp, struct sppp *sp, 4530 unsigned int type, unsigned int id, 4531 ...) 4532 { 4533 STDDCL; 4534 struct ppp_header *h; 4535 struct lcp_header *lh; 4536 struct mbuf *m; 4537 u_char *p; 4538 int len; 4539 unsigned int mlen; 4540 const char *msg; 4541 va_list ap; 4542 4543 MGETHDR (m, M_DONTWAIT, MT_DATA); 4544 if (! m) 4545 return; 4546 m->m_pkthdr.rcvif = 0; 4547 4548 h = mtod (m, struct ppp_header*); 4549 h->address = PPP_ALLSTATIONS; /* broadcast address */ 4550 h->control = PPP_UI; /* Unnumbered Info */ 4551 h->protocol = htons(cp->proto); 4552 4553 lh = (struct lcp_header*)(h + 1); 4554 lh->type = type; 4555 lh->ident = id; 4556 p = (u_char*) (lh+1); 4557 4558 va_start(ap, id); 4559 len = 0; 4560 4561 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 4562 msg = va_arg(ap, const char *); 4563 len += mlen; 4564 if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN) { 4565 va_end(ap); 4566 m_freem(m); 4567 return; 4568 } 4569 4570 bcopy(msg, p, mlen); 4571 p += mlen; 4572 } 4573 va_end(ap); 4574 4575 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len; 4576 lh->len = htons (LCP_HEADER_LEN + len); 4577 4578 if (debug) { 4579 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 4580 SPP_ARGS(ifp), cp->name, 4581 sppp_auth_type_name(cp->proto, lh->type), 4582 lh->ident, ntohs(lh->len)); 4583 if (len) 4584 sppp_print_bytes((u_char*) (lh+1), len); 4585 addlog(">\n"); 4586 } 4587 if (IF_QFULL (&sp->pp_cpq)) { 4588 IF_DROP (&sp->pp_fastq); 4589 IF_DROP (&ifp->if_snd); 4590 m_freem (m); 4591 ++ifp->if_oerrors; 4592 } else 4593 IF_ENQUEUE (&sp->pp_cpq, m); 4594 if (! (ifp->if_flags & IFF_OACTIVE)) 4595 (*ifp->if_start) (ifp); 4596 ifp->if_obytes += m->m_pkthdr.len + 3; 4597 } 4598 4599 /* 4600 * Flush interface queue. 4601 */ 4602 static void 4603 sppp_qflush(struct ifqueue *ifq) 4604 { 4605 struct mbuf *m, *n; 4606 4607 n = ifq->ifq_head; 4608 while ((m = n)) { 4609 n = m->m_act; 4610 m_freem (m); 4611 } 4612 ifq->ifq_head = 0; 4613 ifq->ifq_tail = 0; 4614 ifq->ifq_len = 0; 4615 } 4616 4617 /* 4618 * Send keepalive packets, every 10 seconds. 4619 */ 4620 static void 4621 sppp_keepalive(void *dummy) 4622 { 4623 struct sppp *sp; 4624 int s; 4625 4626 s = splimp(); 4627 for (sp=spppq; sp; sp=sp->pp_next) { 4628 struct ifnet *ifp = &sp->pp_if; 4629 4630 /* Keepalive mode disabled or channel down? */ 4631 if (! (sp->pp_flags & PP_KEEPALIVE) || 4632 ! (ifp->if_flags & IFF_RUNNING)) 4633 continue; 4634 4635 /* No keepalive in PPP mode if LCP not opened yet. */ 4636 if (! (sp->pp_flags & PP_CISCO) && 4637 sp->pp_phase < PHASE_AUTHENTICATE) 4638 continue; 4639 4640 if (sp->pp_alivecnt == MAXALIVECNT) { 4641 /* No keepalive packets got. Stop the interface. */ 4642 printf (SPP_FMT "down\n", SPP_ARGS(ifp)); 4643 if_down (ifp); 4644 sppp_qflush (&sp->pp_cpq); 4645 if (! (sp->pp_flags & PP_CISCO)) { 4646 /* XXX */ 4647 /* Shut down the PPP link. */ 4648 lcp.Down(sp); 4649 /* Initiate negotiation. XXX */ 4650 lcp.Up(sp); 4651 } 4652 } 4653 if (sp->pp_alivecnt <= MAXALIVECNT) 4654 ++sp->pp_alivecnt; 4655 if (sp->pp_flags & PP_CISCO) 4656 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ, 4657 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 4658 else if (sp->pp_phase >= PHASE_AUTHENTICATE) { 4659 long nmagic = htonl (sp->lcp.magic); 4660 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 4661 sppp_cp_send (sp, PPP_LCP, ECHO_REQ, 4662 sp->lcp.echoid, 4, &nmagic); 4663 } 4664 } 4665 splx(s); 4666 #if defined(__NetBSD__) 4667 callout_reset(&keepalive_ch, hz * 10, sppp_keepalive, NULL); 4668 #else 4669 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4670 keepalive_ch = 4671 #endif 4672 timeout(sppp_keepalive, 0, hz * 10); 4673 #endif /* __NetBSD__ */ 4674 } 4675 4676 /* 4677 * Get both IP addresses. 4678 */ 4679 static void 4680 sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst, u_long *srcmask) 4681 { 4682 struct ifnet *ifp = &sp->pp_if; 4683 struct ifaddr *ifa; 4684 struct sockaddr_in *si, *sm; 4685 u_long ssrc, ddst; 4686 4687 sm = NULL; 4688 ssrc = ddst = 0L; 4689 /* 4690 * Pick the first AF_INET address from the list, 4691 * aliases don't make any sense on a p2p link anyway. 4692 */ 4693 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4694 for (ifa = ifp->if_addrhead.tqh_first, si = 0; 4695 ifa; 4696 ifa = ifa->ifa_link.tqe_next) 4697 #elif defined(__NetBSD__) || defined (__OpenBSD__) 4698 for (ifa = ifp->if_addrlist.tqh_first, si = 0; 4699 ifa; 4700 ifa = ifa->ifa_list.tqe_next) 4701 #else 4702 for (ifa = ifp->if_addrlist, si = 0; 4703 ifa; 4704 ifa = ifa->ifa_next) 4705 #endif 4706 if (ifa->ifa_addr->sa_family == AF_INET) { 4707 si = (struct sockaddr_in *)ifa->ifa_addr; 4708 sm = (struct sockaddr_in *)ifa->ifa_netmask; 4709 if (si) 4710 break; 4711 } 4712 if (ifa) { 4713 if (si && si->sin_addr.s_addr) { 4714 ssrc = si->sin_addr.s_addr; 4715 if (srcmask) 4716 *srcmask = ntohl(sm->sin_addr.s_addr); 4717 } 4718 4719 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 4720 if (si && si->sin_addr.s_addr) 4721 ddst = si->sin_addr.s_addr; 4722 } 4723 4724 if (dst) *dst = ntohl(ddst); 4725 if (src) *src = ntohl(ssrc); 4726 } 4727 4728 /* 4729 * Set my IP address. Must be called at splimp. 4730 */ 4731 static void 4732 sppp_set_ip_addr(struct sppp *sp, u_long src) 4733 { 4734 STDDCL; 4735 struct ifaddr *ifa; 4736 struct sockaddr_in *si; 4737 4738 /* 4739 * Pick the first AF_INET address from the list, 4740 * aliases don't make any sense on a p2p link anyway. 4741 */ 4742 4743 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4744 for (ifa = ifp->if_addrhead.tqh_first, si = 0; 4745 ifa; 4746 ifa = ifa->ifa_link.tqe_next) 4747 #elif defined(__NetBSD__) || defined (__OpenBSD__) 4748 for (ifa = ifp->if_addrlist.tqh_first, si = 0; 4749 ifa; 4750 ifa = ifa->ifa_list.tqe_next) 4751 #else 4752 for (ifa = ifp->if_addrlist, si = 0; 4753 ifa; 4754 ifa = ifa->ifa_next) 4755 #endif 4756 { 4757 if (ifa->ifa_addr->sa_family == AF_INET) 4758 { 4759 si = (struct sockaddr_in *)ifa->ifa_addr; 4760 if (si) 4761 break; 4762 } 4763 } 4764 4765 if (ifa && si) 4766 { 4767 int error; 4768 #if __NetBSD_Version__ >= 103080000 4769 struct sockaddr_in new_sin = *si; 4770 4771 new_sin.sin_addr.s_addr = htonl(src); 4772 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 1); 4773 if(debug && error) 4774 { 4775 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: in_ifinit " 4776 " failed, error=%d\n", SPP_ARGS(ifp), error); 4777 } 4778 #else 4779 /* delete old route */ 4780 error = rtinit(ifa, (int)RTM_DELETE, RTF_HOST); 4781 if(debug && error) 4782 { 4783 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit DEL failed, error=%d\n", 4784 SPP_ARGS(ifp), error); 4785 } 4786 4787 /* set new address */ 4788 si->sin_addr.s_addr = htonl(src); 4789 4790 /* add new route */ 4791 error = rtinit(ifa, (int)RTM_ADD, RTF_HOST); 4792 if (debug && error) 4793 { 4794 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit ADD failed, error=%d", 4795 SPP_ARGS(ifp), error); 4796 } 4797 #endif 4798 } 4799 } 4800 4801 #ifdef INET6 4802 /* 4803 * Get both IPv6 addresses. 4804 */ 4805 static void 4806 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 4807 struct in6_addr *srcmask) 4808 { 4809 struct ifnet *ifp = &sp->pp_if; 4810 struct ifaddr *ifa; 4811 struct sockaddr_in6 *si, *sm; 4812 struct in6_addr ssrc, ddst; 4813 4814 sm = NULL; 4815 bzero(&ssrc, sizeof(ssrc)); 4816 bzero(&ddst, sizeof(ddst)); 4817 /* 4818 * Pick the first link-local AF_INET6 address from the list, 4819 * aliases don't make any sense on a p2p link anyway. 4820 */ 4821 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4822 for (ifa = ifp->if_addrhead.tqh_first, si = 0; 4823 ifa; 4824 ifa = ifa->ifa_link.tqe_next) 4825 #elif defined(__NetBSD__) || defined (__OpenBSD__) 4826 for (ifa = ifp->if_addrlist.tqh_first, si = 0; 4827 ifa; 4828 ifa = ifa->ifa_list.tqe_next) 4829 #else 4830 for (ifa = ifp->if_addrlist, si = 0; 4831 ifa; 4832 ifa = ifa->ifa_next) 4833 #endif 4834 if (ifa->ifa_addr->sa_family == AF_INET6) { 4835 si = (struct sockaddr_in6 *)ifa->ifa_addr; 4836 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 4837 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) 4838 break; 4839 } 4840 if (ifa) { 4841 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 4842 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc)); 4843 if (srcmask) { 4844 bcopy(&sm->sin6_addr, srcmask, 4845 sizeof(*srcmask)); 4846 } 4847 } 4848 4849 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 4850 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 4851 bcopy(&si->sin6_addr, &ddst, sizeof(ddst)); 4852 } 4853 4854 if (dst) 4855 bcopy(&ddst, dst, sizeof(*dst)); 4856 if (src) 4857 bcopy(&ssrc, src, sizeof(*src)); 4858 } 4859 4860 #ifdef IPV6CP_MYIFID_DYN 4861 /* 4862 * Generate random ifid. 4863 */ 4864 static void 4865 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 4866 { 4867 /* TBD */ 4868 } 4869 4870 /* 4871 * Set my IPv6 address. Must be called at splimp. 4872 */ 4873 static void 4874 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 4875 { 4876 STDDCL; 4877 struct ifaddr *ifa; 4878 struct sockaddr_in6 *sin6; 4879 4880 /* 4881 * Pick the first link-local AF_INET6 address from the list, 4882 * aliases don't make any sense on a p2p link anyway. 4883 */ 4884 4885 sin6 = NULL; 4886 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 4887 for (ifa = ifp->if_addrhead.tqh_first; 4888 ifa; 4889 ifa = ifa->ifa_link.tqe_next) 4890 #elif defined(__NetBSD__) || defined (__OpenBSD__) 4891 for (ifa = ifp->if_addrlist.tqh_first; 4892 ifa; 4893 ifa = ifa->ifa_list.tqe_next) 4894 #else 4895 for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) 4896 #endif 4897 { 4898 if (ifa->ifa_addr->sa_family == AF_INET6) 4899 { 4900 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 4901 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 4902 break; 4903 } 4904 } 4905 4906 if (ifa && sin6) 4907 { 4908 int error; 4909 struct sockaddr_in6 new_sin6 = *sin6; 4910 4911 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr)); 4912 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 4913 if (debug && error) 4914 { 4915 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit " 4916 " failed, error=%d\n", SPP_ARGS(ifp), error); 4917 } 4918 } 4919 } 4920 #endif 4921 4922 /* 4923 * Suggest a candidate address to be used by peer. 4924 */ 4925 static void 4926 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 4927 { 4928 struct in6_addr myaddr; 4929 struct timeval tv; 4930 4931 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4932 4933 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 4934 microtime(&tv); 4935 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 4936 myaddr.s6_addr[14] ^= 0xff; 4937 myaddr.s6_addr[15] ^= 0xff; 4938 } else { 4939 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 4940 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 4941 } 4942 if (suggest) 4943 bcopy(&myaddr, suggest, sizeof(myaddr)); 4944 } 4945 #endif /*INET6*/ 4946 4947 static int 4948 sppp_params(struct sppp *sp, int cmd, void *data) 4949 { 4950 int subcmd; 4951 struct ifreq *ifr = (struct ifreq *)data; 4952 struct spppreq spr; 4953 4954 /* 4955 * ifr->ifr_data is supposed to point to a struct spppreq. 4956 * Check the cmd word first before attempting to fetch all the 4957 * data. 4958 */ 4959 if ((subcmd = fuword(ifr->ifr_data)) == -1) 4960 return EFAULT; 4961 4962 if (copyin((caddr_t)ifr->ifr_data, &spr, sizeof spr) != 0) 4963 return EFAULT; 4964 4965 switch (subcmd) { 4966 case SPPPIOGDEFS: 4967 if (cmd != SIOCGIFGENERIC) 4968 return EINVAL; 4969 /* 4970 * We copy over the entire current state, but clean 4971 * out some of the stuff we don't wanna pass up. 4972 * Remember, SIOCGIFGENERIC is unprotected, and can be 4973 * called by any user. No need to ever get PAP or 4974 * CHAP secrets back to userland anyway. 4975 */ 4976 bcopy(sp, &spr.defs, sizeof(struct sppp)); 4977 bzero(spr.defs.myauth.secret, AUTHKEYLEN); 4978 bzero(spr.defs.myauth.challenge, AUTHKEYLEN); 4979 bzero(spr.defs.hisauth.secret, AUTHKEYLEN); 4980 bzero(spr.defs.hisauth.challenge, AUTHKEYLEN); 4981 return copyout(&spr, (caddr_t)ifr->ifr_data, sizeof spr); 4982 4983 case SPPPIOSDEFS: 4984 if (cmd != SIOCSIFGENERIC) 4985 return EINVAL; 4986 /* 4987 * We have a very specific idea of which fields we allow 4988 * being passed back from userland, so to not clobber our 4989 * current state. For one, we only allow setting 4990 * anything if LCP is in dead phase. Once the LCP 4991 * negotiations started, the authentication settings must 4992 * not be changed again. (The administrator can force an 4993 * ifconfig down in order to get LCP back into dead 4994 * phase.) 4995 * 4996 * Also, we only allow for authentication parameters to be 4997 * specified. 4998 * 4999 * XXX Should allow to set or clear pp_flags. 5000 * 5001 * Finally, if the respective authentication protocol to 5002 * be used is set differently than 0, but the secret is 5003 * passed as all zeros, we don't trash the existing secret. 5004 * This allows an administrator to change the system name 5005 * only without clobbering the secret (which he didn't get 5006 * back in a previous SPPPIOGDEFS call). However, the 5007 * secrets are cleared if the authentication protocol is 5008 * reset to 0. 5009 */ 5010 if (sp->pp_phase != PHASE_DEAD) 5011 return EBUSY; 5012 5013 if ((spr.defs.myauth.proto != 0 && spr.defs.myauth.proto != PPP_PAP && 5014 spr.defs.myauth.proto != PPP_CHAP) || 5015 (spr.defs.hisauth.proto != 0 && spr.defs.hisauth.proto != PPP_PAP && 5016 spr.defs.hisauth.proto != PPP_CHAP)) 5017 return EINVAL; 5018 5019 if (spr.defs.myauth.proto == 0) 5020 /* resetting myauth */ 5021 bzero(&sp->myauth, sizeof sp->myauth); 5022 else { 5023 /* setting/changing myauth */ 5024 sp->myauth.proto = spr.defs.myauth.proto; 5025 bcopy(spr.defs.myauth.name, sp->myauth.name, AUTHNAMELEN); 5026 if (spr.defs.myauth.secret[0] != '\0') 5027 bcopy(spr.defs.myauth.secret, sp->myauth.secret, 5028 AUTHKEYLEN); 5029 } 5030 if (spr.defs.hisauth.proto == 0) 5031 /* resetting hisauth */ 5032 bzero(&sp->hisauth, sizeof sp->hisauth); 5033 else { 5034 /* setting/changing hisauth */ 5035 sp->hisauth.proto = spr.defs.hisauth.proto; 5036 sp->hisauth.flags = spr.defs.hisauth.flags; 5037 bcopy(spr.defs.hisauth.name, sp->hisauth.name, AUTHNAMELEN); 5038 if (spr.defs.hisauth.secret[0] != '\0') 5039 bcopy(spr.defs.hisauth.secret, sp->hisauth.secret, 5040 AUTHKEYLEN); 5041 } 5042 break; 5043 5044 default: 5045 return EINVAL; 5046 } 5047 5048 return 0; 5049 } 5050 5051 static void 5052 sppp_phase_network(struct sppp *sp) 5053 { 5054 STDDCL; 5055 int i; 5056 u_long mask; 5057 5058 sp->pp_phase = PHASE_NETWORK; 5059 5060 if(debug) 5061 { 5062 log(LOG_INFO, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 5063 sppp_phase_name(sp->pp_phase)); 5064 } 5065 5066 /* Notify NCPs now. */ 5067 for (i = 0; i < IDX_COUNT; i++) 5068 if ((cps[i])->flags & CP_NCP) 5069 (cps[i])->Open(sp); 5070 5071 /* Send Up events to all NCPs. */ 5072 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5073 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) 5074 (cps[i])->Up(sp); 5075 5076 /* if no NCP is starting, all this was in vain, close down */ 5077 sppp_lcp_check_and_close(sp); 5078 } 5079 5080 5081 static const char * 5082 sppp_cp_type_name(u_char type) 5083 { 5084 static char buf[12]; 5085 switch (type) { 5086 case CONF_REQ: return "conf-req"; 5087 case CONF_ACK: return "conf-ack"; 5088 case CONF_NAK: return "conf-nak"; 5089 case CONF_REJ: return "conf-rej"; 5090 case TERM_REQ: return "term-req"; 5091 case TERM_ACK: return "term-ack"; 5092 case CODE_REJ: return "code-rej"; 5093 case PROTO_REJ: return "proto-rej"; 5094 case ECHO_REQ: return "echo-req"; 5095 case ECHO_REPLY: return "echo-reply"; 5096 case DISC_REQ: return "discard-req"; 5097 } 5098 sprintf (buf, "0x%x", type); 5099 return buf; 5100 } 5101 5102 static const char * 5103 sppp_auth_type_name(u_short proto, u_char type) 5104 { 5105 static char buf[12]; 5106 switch (proto) { 5107 case PPP_CHAP: 5108 switch (type) { 5109 case CHAP_CHALLENGE: return "challenge"; 5110 case CHAP_RESPONSE: return "response"; 5111 case CHAP_SUCCESS: return "success"; 5112 case CHAP_FAILURE: return "failure"; 5113 } 5114 case PPP_PAP: 5115 switch (type) { 5116 case PAP_REQ: return "req"; 5117 case PAP_ACK: return "ack"; 5118 case PAP_NAK: return "nak"; 5119 } 5120 } 5121 sprintf (buf, "0x%x", type); 5122 return buf; 5123 } 5124 5125 static const char * 5126 sppp_lcp_opt_name(u_char opt) 5127 { 5128 static char buf[12]; 5129 switch (opt) { 5130 case LCP_OPT_MRU: return "mru"; 5131 case LCP_OPT_ASYNC_MAP: return "async-map"; 5132 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 5133 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 5134 case LCP_OPT_MAGIC: return "magic"; 5135 case LCP_OPT_PROTO_COMP: return "proto-comp"; 5136 case LCP_OPT_ADDR_COMP: return "addr-comp"; 5137 } 5138 sprintf (buf, "0x%x", opt); 5139 return buf; 5140 } 5141 5142 static const char * 5143 sppp_ipcp_opt_name(u_char opt) 5144 { 5145 static char buf[12]; 5146 switch (opt) { 5147 case IPCP_OPT_ADDRESSES: return "addresses"; 5148 case IPCP_OPT_COMPRESSION: return "compression"; 5149 case IPCP_OPT_ADDRESS: return "address"; 5150 } 5151 sprintf (buf, "0x%x", opt); 5152 return buf; 5153 } 5154 5155 #ifdef INET6 5156 static const char * 5157 sppp_ipv6cp_opt_name(u_char opt) 5158 { 5159 static char buf[12]; 5160 switch (opt) { 5161 case IPV6CP_OPT_IFID: return "ifid"; 5162 case IPV6CP_OPT_COMPRESSION: return "compression"; 5163 } 5164 sprintf (buf, "0x%x", opt); 5165 return buf; 5166 } 5167 #endif 5168 5169 static const char * 5170 sppp_state_name(int state) 5171 { 5172 switch (state) { 5173 case STATE_INITIAL: return "initial"; 5174 case STATE_STARTING: return "starting"; 5175 case STATE_CLOSED: return "closed"; 5176 case STATE_STOPPED: return "stopped"; 5177 case STATE_CLOSING: return "closing"; 5178 case STATE_STOPPING: return "stopping"; 5179 case STATE_REQ_SENT: return "req-sent"; 5180 case STATE_ACK_RCVD: return "ack-rcvd"; 5181 case STATE_ACK_SENT: return "ack-sent"; 5182 case STATE_OPENED: return "opened"; 5183 } 5184 return "illegal"; 5185 } 5186 5187 static const char * 5188 sppp_phase_name(enum ppp_phase phase) 5189 { 5190 switch (phase) { 5191 case PHASE_DEAD: return "dead"; 5192 case PHASE_ESTABLISH: return "establish"; 5193 case PHASE_TERMINATE: return "terminate"; 5194 case PHASE_AUTHENTICATE: return "authenticate"; 5195 case PHASE_NETWORK: return "network"; 5196 } 5197 return "illegal"; 5198 } 5199 5200 static const char * 5201 sppp_proto_name(u_short proto) 5202 { 5203 static char buf[12]; 5204 switch (proto) { 5205 case PPP_LCP: return "lcp"; 5206 case PPP_IPCP: return "ipcp"; 5207 case PPP_PAP: return "pap"; 5208 case PPP_CHAP: return "chap"; 5209 case PPP_IPV6CP: return "ipv6cp"; 5210 } 5211 sprintf(buf, "0x%x", (unsigned)proto); 5212 return buf; 5213 } 5214 5215 static void 5216 sppp_print_bytes(const u_char *p, u_short len) 5217 { 5218 addlog(" %02x", *p++); 5219 while (--len > 0) 5220 addlog("-%02x", *p++); 5221 } 5222 5223 static void 5224 sppp_print_string(const char *p, u_short len) 5225 { 5226 u_char c; 5227 5228 while (len-- > 0) { 5229 c = *p++; 5230 /* 5231 * Print only ASCII chars directly. RFC 1994 recommends 5232 * using only them, but we don't rely on it. */ 5233 if (c < ' ' || c > '~') 5234 addlog("\\x%x", c); 5235 else 5236 addlog("%c", c); 5237 } 5238 } 5239 5240 static const char * 5241 sppp_dotted_quad(u_long addr) 5242 { 5243 static char s[16]; 5244 sprintf(s, "%d.%d.%d.%d", 5245 (int)((addr >> 24) & 0xff), 5246 (int)((addr >> 16) & 0xff), 5247 (int)((addr >> 8) & 0xff), 5248 (int)(addr & 0xff)); 5249 return s; 5250 } 5251 5252 static int 5253 sppp_strnlen(u_char *p, int max) 5254 { 5255 int len; 5256 5257 for (len = 0; len < max && *p; ++p) 5258 ++len; 5259 return len; 5260 } 5261 5262 /* a dummy, used to drop uninteresting events */ 5263 static void 5264 sppp_null(struct sppp *unused) 5265 { 5266 /* do just nothing */ 5267 } 5268 /* 5269 * This file is large. Tell emacs to highlight it nevertheless. 5270 * 5271 * Local Variables: 5272 * hilit-auto-highlight-maxout: 120000 5273 * End: 5274 */ 5275
Indexes created Tue Oct 14 11:09:46 GMT 2025