if_spppsubr.c revision 1.64
1 /* $NetBSD: if_spppsubr.c,v 1.64 2003/05/14 22:41:40 itojun 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 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions are met: 18 * 1. Redistributions of source code must retain the above copyright notice, 19 * this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright notice, 21 * this list of conditions and the following disclaimer in the documentation 22 * and/or other materials provided with the distribution. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE FREEBSD PROJECT ``AS IS'' AND ANY 25 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE FREEBSD PROJECT OR CONTRIBUTORS BE 28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 34 * POSSIBILITY OF SUCH DAMAGE. 35 * 36 * From: Version 2.4, Thu Apr 30 17:17:21 MSD 1997 37 * 38 * From: if_spppsubr.c,v 1.39 1998/04/04 13:26:03 phk Exp 39 * 40 * From: Id: if_spppsubr.c,v 1.23 1999/02/23 14:47:50 hm Exp 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: if_spppsubr.c,v 1.64 2003/05/14 22:41:40 itojun Exp $"); 45 46 #include "opt_inet.h" 47 #include "opt_ipx.h" 48 #include "opt_iso.h" 49 #include "opt_ns.h" 50 51 #include <sys/param.h> 52 #include <sys/proc.h> 53 #include <sys/systm.h> 54 #include <sys/kernel.h> 55 #include <sys/sockio.h> 56 #include <sys/socket.h> 57 #include <sys/syslog.h> 58 #include <sys/malloc.h> 59 #include <sys/mbuf.h> 60 #include <sys/callout.h> 61 #include <sys/md5.h> 62 #include <sys/inttypes.h> 63 64 #include <net/if.h> 65 #include <net/netisr.h> 66 #include <net/if_types.h> 67 #include <net/route.h> 68 #include <net/ppp_defs.h> 69 70 #include <machine/stdarg.h> 71 72 #include <netinet/in.h> 73 #include <netinet/in_systm.h> 74 #include <netinet/in_var.h> 75 #ifdef INET 76 #include <netinet/ip.h> 77 #include <netinet/tcp.h> 78 #endif 79 #include <net/ethertypes.h> 80 81 #ifdef IPX 82 #include <netipx/ipx.h> 83 #include <netipx/ipx_if.h> 84 #endif 85 86 #ifdef NS 87 #include <netns/ns.h> 88 #include <netns/ns_if.h> 89 #endif 90 91 #ifdef ISO 92 #include <netiso/argo_debug.h> 93 #include <netiso/iso.h> 94 #include <netiso/iso_var.h> 95 #include <netiso/iso_snpac.h> 96 #endif 97 98 #include <net/if_sppp.h> 99 #include <net/if_spppvar.h> 100 101 #define LCP_KEEPALIVE_INTERVAL 10 /* seconds */ 102 #define MAXALIVECNT 3 /* max. missed alive packets */ 103 #define DEFAULT_MAX_AUTH_FAILURES 5 /* max. auth. failures */ 104 105 /* 106 * Interface flags that can be set in an ifconfig command. 107 * 108 * Setting link0 will make the link passive, i.e. it will be marked 109 * as being administrative openable, but won't be opened to begin 110 * with. Incoming calls will be answered, or subsequent calls with 111 * -link1 will cause the administrative open of the LCP layer. 112 * 113 * Setting link1 will cause the link to auto-dial only as packets 114 * arrive to be sent. 115 * 116 * Setting IFF_DEBUG will syslog the option negotiation and state 117 * transitions at level kern.debug. Note: all logs consistently look 118 * like 119 * 120 * <if-name><unit>: <proto-name> <additional info...> 121 * 122 * with <if-name><unit> being something like "bppp0", and <proto-name> 123 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc. 124 */ 125 126 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ 127 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */ 128 129 #define CONF_REQ 1 /* PPP configure request */ 130 #define CONF_ACK 2 /* PPP configure acknowledge */ 131 #define CONF_NAK 3 /* PPP configure negative ack */ 132 #define CONF_REJ 4 /* PPP configure reject */ 133 #define TERM_REQ 5 /* PPP terminate request */ 134 #define TERM_ACK 6 /* PPP terminate acknowledge */ 135 #define CODE_REJ 7 /* PPP code reject */ 136 #define PROTO_REJ 8 /* PPP protocol reject */ 137 #define ECHO_REQ 9 /* PPP echo request */ 138 #define ECHO_REPLY 10 /* PPP echo reply */ 139 #define DISC_REQ 11 /* PPP discard request */ 140 141 #define LCP_OPT_MRU 1 /* maximum receive unit */ 142 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */ 143 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ 144 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ 145 #define LCP_OPT_MAGIC 5 /* magic number */ 146 #define LCP_OPT_RESERVED 6 /* reserved */ 147 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ 148 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ 149 150 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ 151 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol */ 152 #define IPCP_OPT_ADDRESS 3 /* local IP address */ 153 #define IPCP_OPT_PRIMDNS 129 /* primary remote dns address */ 154 #define IPCP_OPT_SECDNS 131 /* secondary remote dns address */ 155 156 #define IPV6CP_OPT_IFID 1 /* interface identifier */ 157 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ 158 159 #define PAP_REQ 1 /* PAP name/password request */ 160 #define PAP_ACK 2 /* PAP acknowledge */ 161 #define PAP_NAK 3 /* PAP fail */ 162 163 #define CHAP_CHALLENGE 1 /* CHAP challenge request */ 164 #define CHAP_RESPONSE 2 /* CHAP challenge response */ 165 #define CHAP_SUCCESS 3 /* CHAP response ok */ 166 #define CHAP_FAILURE 4 /* CHAP response failed */ 167 168 #define CHAP_MD5 5 /* hash algorithm - MD5 */ 169 170 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */ 171 #define CISCO_UNICAST 0x0f /* Cisco unicast address */ 172 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ 173 #define CISCO_ADDR_REQ 0 /* Cisco address request */ 174 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */ 175 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ 176 177 /* states are named and numbered according to RFC 1661 */ 178 #define STATE_INITIAL 0 179 #define STATE_STARTING 1 180 #define STATE_CLOSED 2 181 #define STATE_STOPPED 3 182 #define STATE_CLOSING 4 183 #define STATE_STOPPING 5 184 #define STATE_REQ_SENT 6 185 #define STATE_ACK_RCVD 7 186 #define STATE_ACK_SENT 8 187 #define STATE_OPENED 9 188 189 struct ppp_header { 190 u_char address; 191 u_char control; 192 u_short protocol; 193 } __attribute__((__packed__)); 194 #define PPP_HEADER_LEN sizeof (struct ppp_header) 195 196 struct lcp_header { 197 u_char type; 198 u_char ident; 199 u_short len; 200 } __attribute__((__packed__)); 201 #define LCP_HEADER_LEN sizeof (struct lcp_header) 202 203 struct cisco_packet { 204 u_int32_t type; 205 u_int32_t par1; 206 u_int32_t par2; 207 u_short rel; 208 u_short time0; 209 u_short time1; 210 } __attribute__((__packed__)); 211 #define CISCO_PACKET_LEN 18 212 213 /* 214 * We follow the spelling and capitalization of RFC 1661 here, to make 215 * it easier comparing with the standard. Please refer to this RFC in 216 * case you can't make sense out of these abbreviation; it will also 217 * explain the semantics related to the various events and actions. 218 */ 219 struct cp { 220 u_short proto; /* PPP control protocol number */ 221 u_char protoidx; /* index into state table in struct sppp */ 222 u_char flags; 223 #define CP_LCP 0x01 /* this is the LCP */ 224 #define CP_AUTH 0x02 /* this is an authentication protocol */ 225 #define CP_NCP 0x04 /* this is a NCP */ 226 #define CP_QUAL 0x08 /* this is a quality reporting protocol */ 227 const char *name; /* name of this control protocol */ 228 /* event handlers */ 229 void (*Up)(struct sppp *sp); 230 void (*Down)(struct sppp *sp); 231 void (*Open)(struct sppp *sp); 232 void (*Close)(struct sppp *sp); 233 void (*TO)(void *sp); 234 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len); 235 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len); 236 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len); 237 /* actions */ 238 void (*tlu)(struct sppp *sp); 239 void (*tld)(struct sppp *sp); 240 void (*tls)(struct sppp *sp); 241 void (*tlf)(struct sppp *sp); 242 void (*scr)(struct sppp *sp); 243 }; 244 245 static struct sppp *spppq; 246 static struct callout keepalive_ch; 247 248 #ifdef INET 249 /* 250 * The following disgusting hack gets around the problem that IP TOS 251 * can't be set yet. We want to put "interactive" traffic on a high 252 * priority queue. To decide if traffic is interactive, we check that 253 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 254 * 255 * XXX is this really still necessary? - joerg - 256 */ 257 static u_short interactive_ports[8] = { 258 0, 513, 0, 0, 259 0, 21, 0, 23, 260 }; 261 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 262 #endif 263 264 /* almost every function needs these */ 265 #define STDDCL \ 266 struct ifnet *ifp = &sp->pp_if; \ 267 int debug = ifp->if_flags & IFF_DEBUG 268 269 static int sppp_output(struct ifnet *ifp, struct mbuf *m, 270 struct sockaddr *dst, struct rtentry *rt); 271 272 static void sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2); 273 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m); 274 275 static void sppp_cp_input(const struct cp *cp, struct sppp *sp, 276 struct mbuf *m); 277 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 278 u_char ident, u_short len, void *data); 279 /* static void sppp_cp_timeout(void *arg); */ 280 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp, 281 int newstate); 282 static void sppp_auth_send(const struct cp *cp, 283 struct sppp *sp, unsigned int type, unsigned int id, 284 ...); 285 286 static void sppp_up_event(const struct cp *cp, struct sppp *sp); 287 static void sppp_down_event(const struct cp *cp, struct sppp *sp); 288 static void sppp_open_event(const struct cp *cp, struct sppp *sp); 289 static void sppp_close_event(const struct cp *cp, struct sppp *sp); 290 static void sppp_to_event(const struct cp *cp, struct sppp *sp); 291 292 static void sppp_null(struct sppp *sp); 293 294 static void sppp_lcp_init(struct sppp *sp); 295 static void sppp_lcp_up(struct sppp *sp); 296 static void sppp_lcp_down(struct sppp *sp); 297 static void sppp_lcp_open(struct sppp *sp); 298 static void sppp_lcp_close(struct sppp *sp); 299 static void sppp_lcp_TO(void *sp); 300 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 301 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 302 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 303 static void sppp_lcp_tlu(struct sppp *sp); 304 static void sppp_lcp_tld(struct sppp *sp); 305 static void sppp_lcp_tls(struct sppp *sp); 306 static void sppp_lcp_tlf(struct sppp *sp); 307 static void sppp_lcp_scr(struct sppp *sp); 308 static void sppp_lcp_check_and_close(struct sppp *sp); 309 static int sppp_ncp_check(struct sppp *sp); 310 311 static void sppp_ipcp_init(struct sppp *sp); 312 static void sppp_ipcp_up(struct sppp *sp); 313 static void sppp_ipcp_down(struct sppp *sp); 314 static void sppp_ipcp_open(struct sppp *sp); 315 static void sppp_ipcp_close(struct sppp *sp); 316 static void sppp_ipcp_TO(void *sp); 317 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 318 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 319 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 320 static void sppp_ipcp_tlu(struct sppp *sp); 321 static void sppp_ipcp_tld(struct sppp *sp); 322 static void sppp_ipcp_tls(struct sppp *sp); 323 static void sppp_ipcp_tlf(struct sppp *sp); 324 static void sppp_ipcp_scr(struct sppp *sp); 325 326 static void sppp_ipv6cp_init(struct sppp *sp); 327 static void sppp_ipv6cp_up(struct sppp *sp); 328 static void sppp_ipv6cp_down(struct sppp *sp); 329 static void sppp_ipv6cp_open(struct sppp *sp); 330 static void sppp_ipv6cp_close(struct sppp *sp); 331 static void sppp_ipv6cp_TO(void *sp); 332 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len); 333 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 334 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 335 static void sppp_ipv6cp_tlu(struct sppp *sp); 336 static void sppp_ipv6cp_tld(struct sppp *sp); 337 static void sppp_ipv6cp_tls(struct sppp *sp); 338 static void sppp_ipv6cp_tlf(struct sppp *sp); 339 static void sppp_ipv6cp_scr(struct sppp *sp); 340 341 static void sppp_pap_input(struct sppp *sp, struct mbuf *m); 342 static void sppp_pap_init(struct sppp *sp); 343 static void sppp_pap_open(struct sppp *sp); 344 static void sppp_pap_close(struct sppp *sp); 345 static void sppp_pap_TO(void *sp); 346 static void sppp_pap_my_TO(void *sp); 347 static void sppp_pap_tlu(struct sppp *sp); 348 static void sppp_pap_tld(struct sppp *sp); 349 static void sppp_pap_scr(struct sppp *sp); 350 351 static void sppp_chap_input(struct sppp *sp, struct mbuf *m); 352 static void sppp_chap_init(struct sppp *sp); 353 static void sppp_chap_open(struct sppp *sp); 354 static void sppp_chap_close(struct sppp *sp); 355 static void sppp_chap_TO(void *sp); 356 static void sppp_chap_tlu(struct sppp *sp); 357 static void sppp_chap_tld(struct sppp *sp); 358 static void sppp_chap_scr(struct sppp *sp); 359 360 static const char *sppp_auth_type_name(u_short proto, u_char type); 361 static const char *sppp_cp_type_name(u_char type); 362 static const char *sppp_dotted_quad(u_int32_t addr); 363 static const char *sppp_ipcp_opt_name(u_char opt); 364 #ifdef INET6 365 static const char *sppp_ipv6cp_opt_name(u_char opt); 366 #endif 367 static const char *sppp_lcp_opt_name(u_char opt); 368 static const char *sppp_phase_name(int phase); 369 static const char *sppp_proto_name(u_short proto); 370 static const char *sppp_state_name(int state); 371 static int sppp_params(struct sppp *sp, int cmd, void *data); 372 static void sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, 373 u_int32_t *srcmask); 374 static void sppp_keepalive(void *dummy); 375 static void sppp_phase_network(struct sppp *sp); 376 static void sppp_print_bytes(const u_char *p, u_short len); 377 static void sppp_print_string(const char *p, u_short len); 378 static void sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr); 379 static void sppp_clear_ip_addrs(struct sppp *sp); 380 #ifdef INET6 381 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, 382 struct in6_addr *dst, struct in6_addr *srcmask); 383 #ifdef IPV6CP_MYIFID_DYN 384 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src); 385 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src); 386 #endif 387 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src); 388 #endif 389 390 /* our control protocol descriptors */ 391 static const struct cp lcp = { 392 PPP_LCP, IDX_LCP, CP_LCP, "lcp", 393 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close, 394 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak, 395 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf, 396 sppp_lcp_scr 397 }; 398 399 static const struct cp ipcp = { 400 PPP_IPCP, IDX_IPCP, 401 #ifdef INET 402 CP_NCP, /*don't run IPCP if there's no IPv4 support*/ 403 #else 404 0, 405 #endif 406 "ipcp", 407 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close, 408 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak, 409 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf, 410 sppp_ipcp_scr 411 }; 412 413 static const struct cp ipv6cp = { 414 PPP_IPV6CP, IDX_IPV6CP, 415 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 416 CP_NCP, 417 #else 418 0, 419 #endif 420 "ipv6cp", 421 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close, 422 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak, 423 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf, 424 sppp_ipv6cp_scr 425 }; 426 427 static const struct cp pap = { 428 PPP_PAP, IDX_PAP, CP_AUTH, "pap", 429 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close, 430 sppp_pap_TO, 0, 0, 0, 431 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null, 432 sppp_pap_scr 433 }; 434 435 static const struct cp chap = { 436 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 437 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close, 438 sppp_chap_TO, 0, 0, 0, 439 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null, 440 sppp_chap_scr 441 }; 442 443 static const struct cp *cps[IDX_COUNT] = { 444 &lcp, /* IDX_LCP */ 445 &ipcp, /* IDX_IPCP */ 446 &ipv6cp, /* IDX_IPV6CP */ 447 &pap, /* IDX_PAP */ 448 &chap, /* IDX_CHAP */ 449 }; 450 451 452 /* 453 * Exported functions, comprising our interface to the lower layer. 454 */ 455 456 /* 457 * Process the received packet. 458 */ 459 void 460 sppp_input(struct ifnet *ifp, struct mbuf *m) 461 { 462 struct ppp_header *h = NULL; 463 struct ifqueue *inq = 0; 464 u_int16_t protocol; 465 int s; 466 struct sppp *sp = (struct sppp *)ifp; 467 int debug = ifp->if_flags & IFF_DEBUG; 468 469 if (ifp->if_flags & IFF_UP) 470 /* Count received bytes, add hardware framing */ 471 ifp->if_ibytes += m->m_pkthdr.len + sp->pp_framebytes; 472 473 if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 474 /* Too small packet, drop it. */ 475 if (debug) 476 log(LOG_DEBUG, 477 "%s: input packet is too small, %d bytes\n", 478 ifp->if_xname, m->m_pkthdr.len); 479 drop: 480 ++ifp->if_ierrors; 481 ++ifp->if_iqdrops; 482 m_freem(m); 483 return; 484 } 485 486 if (sp->pp_flags & PP_NOFRAMING) { 487 memcpy(&protocol, mtod(m, void *), 2); 488 protocol = ntohs(protocol); 489 m_adj(m, 2); 490 } else { 491 492 /* Get PPP header. */ 493 h = mtod(m, struct ppp_header *); 494 m_adj(m, PPP_HEADER_LEN); 495 496 switch (h->address) { 497 case PPP_ALLSTATIONS: 498 if (h->control != PPP_UI) 499 goto invalid; 500 if (sp->pp_flags & PP_CISCO) { 501 if (debug) 502 log(LOG_DEBUG, 503 "%s: PPP packet in Cisco mode " 504 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 505 ifp->if_xname, 506 h->address, h->control, ntohs(h->protocol)); 507 goto drop; 508 } 509 break; 510 case CISCO_MULTICAST: 511 case CISCO_UNICAST: 512 /* Don't check the control field here (RFC 1547). */ 513 if (! (sp->pp_flags & PP_CISCO)) { 514 if (debug) 515 log(LOG_DEBUG, 516 "%s: Cisco packet in PPP mode " 517 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 518 ifp->if_xname, 519 h->address, h->control, ntohs(h->protocol)); 520 goto drop; 521 } 522 switch (ntohs(h->protocol)) { 523 default: 524 ++ifp->if_noproto; 525 goto invalid; 526 case CISCO_KEEPALIVE: 527 sppp_cisco_input((struct sppp *) ifp, m); 528 m_freem(m); 529 return; 530 #ifdef INET 531 case ETHERTYPE_IP: 532 schednetisr(NETISR_IP); 533 inq = &ipintrq; 534 break; 535 #endif 536 #ifdef INET6 537 case ETHERTYPE_IPV6: 538 schednetisr(NETISR_IPV6); 539 inq = &ip6intrq; 540 break; 541 #endif 542 #ifdef IPX 543 case ETHERTYPE_IPX: 544 schednetisr(NETISR_IPX); 545 inq = &ipxintrq; 546 break; 547 #endif 548 #ifdef NS 549 case ETHERTYPE_NS: 550 schednetisr(NETISR_NS); 551 inq = &nsintrq; 552 break; 553 #endif 554 } 555 goto queue_pkt; 556 default: /* Invalid PPP packet. */ 557 invalid: 558 if (debug) 559 log(LOG_DEBUG, 560 "%s: invalid input packet " 561 "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 562 ifp->if_xname, 563 h->address, h->control, ntohs(h->protocol)); 564 goto drop; 565 } 566 protocol = ntohs(h->protocol); 567 } 568 569 switch (protocol) { 570 default: 571 if (sp->state[IDX_LCP] == STATE_OPENED) { 572 u_int16_t prot = htons(protocol); 573 sppp_cp_send(sp, PPP_LCP, PROTO_REJ, 574 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2, 575 &prot); 576 } 577 if (debug) 578 log(LOG_DEBUG, 579 "%s: invalid input protocol " 580 "<proto=0x%x>\n", ifp->if_xname, ntohs(protocol)); 581 ++ifp->if_noproto; 582 goto drop; 583 case PPP_LCP: 584 sppp_cp_input(&lcp, sp, m); 585 m_freem(m); 586 return; 587 case PPP_PAP: 588 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 589 sppp_pap_input(sp, m); 590 m_freem(m); 591 return; 592 case PPP_CHAP: 593 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) 594 sppp_chap_input(sp, m); 595 m_freem(m); 596 return; 597 #ifdef INET 598 case PPP_IPCP: 599 if (sp->pp_phase == SPPP_PHASE_NETWORK) 600 sppp_cp_input(&ipcp, sp, m); 601 m_freem(m); 602 return; 603 case PPP_IP: 604 if (sp->state[IDX_IPCP] == STATE_OPENED) { 605 schednetisr(NETISR_IP); 606 inq = &ipintrq; 607 sp->pp_last_activity = mono_time.tv_sec; 608 } 609 break; 610 #endif 611 #ifdef INET6 612 case PPP_IPV6CP: 613 if (sp->pp_phase == SPPP_PHASE_NETWORK) 614 sppp_cp_input(&ipv6cp, sp, m); 615 m_freem(m); 616 return; 617 618 case PPP_IPV6: 619 if (sp->state[IDX_IPV6CP] == STATE_OPENED) { 620 schednetisr(NETISR_IPV6); 621 inq = &ip6intrq; 622 sp->pp_last_activity = mono_time.tv_sec; 623 } 624 break; 625 #endif 626 #ifdef IPX 627 case PPP_IPX: 628 /* IPX IPXCP not implemented yet */ 629 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 630 schednetisr(NETISR_IPX); 631 inq = &ipxintrq; 632 } 633 break; 634 #endif 635 #ifdef NS 636 case PPP_XNS: 637 /* XNS IDPCP not implemented yet */ 638 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 639 schednetisr(NETISR_NS); 640 inq = &nsintrq; 641 } 642 break; 643 #endif 644 #ifdef ISO 645 case PPP_ISO: 646 /* OSI NLCP not implemented yet */ 647 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 648 schednetisr(NETISR_ISO); 649 inq = &clnlintrq; 650 } 651 break; 652 #endif 653 } 654 655 queue_pkt: 656 if (! (ifp->if_flags & IFF_UP) || ! inq) 657 goto drop; 658 659 /* Check queue. */ 660 s = splnet(); 661 if (IF_QFULL(inq)) { 662 /* Queue overflow. */ 663 IF_DROP(inq); 664 splx(s); 665 if (debug) 666 log(LOG_DEBUG, "%s: protocol queue overflow\n", 667 ifp->if_xname); 668 goto drop; 669 } 670 IF_ENQUEUE(inq, m); 671 splx(s); 672 } 673 674 /* 675 * Enqueue transmit packet. 676 */ 677 static int 678 sppp_output(struct ifnet *ifp, struct mbuf *m, 679 struct sockaddr *dst, struct rtentry *rt) 680 { 681 struct sppp *sp = (struct sppp *) ifp; 682 struct ppp_header *h = NULL; 683 struct ifqueue *ifq = NULL; /* XXX */ 684 int s, len, rv = 0; 685 u_int16_t protocol; 686 ALTQ_DECL(struct altq_pktattr pktattr;) 687 688 s = splnet(); 689 690 sp->pp_last_activity = mono_time.tv_sec; 691 692 if ((ifp->if_flags & IFF_UP) == 0 || 693 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 694 m_freem(m); 695 splx(s); 696 return (ENETDOWN); 697 } 698 699 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 700 /* 701 * Interface is not yet running, but auto-dial. Need 702 * to start LCP for it. 703 */ 704 ifp->if_flags |= IFF_RUNNING; 705 splx(s); 706 lcp.Open(sp); 707 s = splnet(); 708 } 709 710 /* 711 * If the queueing discipline needs packet classification, 712 * do it before prepending link headers. 713 */ 714 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family, &pktattr); 715 716 #ifdef INET 717 if (dst->sa_family == AF_INET) { 718 struct ip *ip = NULL; 719 struct tcphdr *th = NULL; 720 721 if (m->m_len >= sizeof(struct ip)) { 722 ip = mtod(m, struct ip *); 723 if (ip->ip_p == IPPROTO_TCP && 724 m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) + 725 sizeof(struct tcphdr)) { 726 th = (struct tcphdr *) 727 ((caddr_t)ip + (ip->ip_hl << 2)); 728 } 729 } else 730 ip = NULL; 731 732 /* 733 * When using dynamic local IP address assignment by using 734 * 0.0.0.0 as a local address, the first TCP session will 735 * not connect because the local TCP checksum is computed 736 * using 0.0.0.0 which will later become our real IP address 737 * so the TCP checksum computed at the remote end will 738 * become invalid. So we 739 * - don't let packets with src ip addr 0 thru 740 * - we flag TCP packets with src ip 0 as an error 741 */ 742 if (ip && ip->ip_src.s_addr == INADDR_ANY) { 743 u_int8_t proto = ip->ip_p; 744 745 m_freem(m); 746 splx(s); 747 if (proto == IPPROTO_TCP) 748 return (EADDRNOTAVAIL); 749 else 750 return (0); 751 } 752 753 /* 754 * Put low delay, telnet, rlogin and ftp control packets 755 * in front of the queue. 756 */ 757 758 if (!IF_QFULL(&sp->pp_fastq) && 759 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) || 760 (th && (INTERACTIVE(ntohs(th->th_sport)) || 761 INTERACTIVE(ntohs(th->th_dport)))))) 762 ifq = &sp->pp_fastq; 763 } 764 #endif 765 766 #ifdef INET6 767 if (dst->sa_family == AF_INET6) { 768 /* XXX do something tricky here? */ 769 } 770 #endif 771 772 if ((sp->pp_flags & PP_NOFRAMING) == 0) { 773 /* 774 * Prepend general data packet PPP header. For now, IP only. 775 */ 776 M_PREPEND(m, PPP_HEADER_LEN, M_DONTWAIT); 777 if (! m) { 778 if (ifp->if_flags & IFF_DEBUG) 779 log(LOG_DEBUG, "%s: no memory for transmit header\n", 780 ifp->if_xname); 781 ++ifp->if_oerrors; 782 splx(s); 783 return (ENOBUFS); 784 } 785 /* 786 * May want to check size of packet 787 * (albeit due to the implementation it's always enough) 788 */ 789 h = mtod(m, struct ppp_header *); 790 if (sp->pp_flags & PP_CISCO) { 791 h->address = CISCO_UNICAST; /* unicast address */ 792 h->control = 0; 793 } else { 794 h->address = PPP_ALLSTATIONS; /* broadcast address */ 795 h->control = PPP_UI; /* Unnumbered Info */ 796 } 797 } 798 799 switch (dst->sa_family) { 800 #ifdef INET 801 case AF_INET: /* Internet Protocol */ 802 if (sp->pp_flags & PP_CISCO) 803 protocol = htons(ETHERTYPE_IP); 804 else { 805 /* 806 * Don't choke with an ENETDOWN early. It's 807 * possible that we just started dialing out, 808 * so don't drop the packet immediately. If 809 * we notice that we run out of buffer space 810 * below, we will however remember that we are 811 * not ready to carry IP packets, and return 812 * ENETDOWN, as opposed to ENOBUFS. 813 */ 814 protocol = htons(PPP_IP); 815 if (sp->state[IDX_IPCP] != STATE_OPENED) 816 rv = ENETDOWN; 817 } 818 break; 819 #endif 820 #ifdef INET6 821 case AF_INET6: /* Internet Protocol version 6 */ 822 if (sp->pp_flags & PP_CISCO) 823 protocol = htons(ETHERTYPE_IPV6); 824 else { 825 /* 826 * Don't choke with an ENETDOWN early. It's 827 * possible that we just started dialing out, 828 * so don't drop the packet immediately. If 829 * we notice that we run out of buffer space 830 * below, we will however remember that we are 831 * not ready to carry IP packets, and return 832 * ENETDOWN, as opposed to ENOBUFS. 833 */ 834 protocol = htons(PPP_IPV6); 835 if (sp->state[IDX_IPV6CP] != STATE_OPENED) 836 rv = ENETDOWN; 837 } 838 break; 839 #endif 840 #ifdef NS 841 case AF_NS: /* Xerox NS Protocol */ 842 protocol = htons((sp->pp_flags & PP_CISCO) ? 843 ETHERTYPE_NS : PPP_XNS); 844 break; 845 #endif 846 #ifdef IPX 847 case AF_IPX: /* Novell IPX Protocol */ 848 protocol = htons((sp->pp_flags & PP_CISCO) ? 849 ETHERTYPE_IPX : PPP_IPX); 850 break; 851 #endif 852 #ifdef ISO 853 case AF_ISO: /* ISO OSI Protocol */ 854 if (sp->pp_flags & PP_CISCO) 855 goto nosupport; 856 protocol = htons(PPP_ISO); 857 break; 858 nosupport: 859 #endif 860 default: 861 m_freem(m); 862 ++ifp->if_oerrors; 863 splx(s); 864 return (EAFNOSUPPORT); 865 } 866 867 if (sp->pp_flags & PP_NOFRAMING) { 868 M_PREPEND(m, 2, M_DONTWAIT); 869 if (m == NULL) { 870 if (ifp->if_flags & IFF_DEBUG) 871 log(LOG_DEBUG, "%s: no memory for transmit header\n", 872 ifp->if_xname); 873 ++ifp->if_oerrors; 874 splx(s); 875 return (ENOBUFS); 876 } 877 *mtod(m, u_int16_t *) = protocol; 878 } else { 879 h->protocol = protocol; 880 } 881 882 /* 883 * Queue message on interface, and start output if interface 884 * not yet active. 885 */ 886 len = m->m_pkthdr.len; 887 if (ifq != NULL 888 #ifdef ALTQ 889 && ALTQ_IS_ENABLED(&ifp->if_snd) == 0 890 #endif 891 ) { 892 if (IF_QFULL(ifq)) { 893 IF_DROP(&ifp->if_snd); 894 m_freem(m); 895 if (rv == 0) 896 rv = ENOBUFS; 897 } 898 else 899 IF_ENQUEUE(ifq, m); 900 } else 901 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, rv); 902 if (rv != 0) { 903 ++ifp->if_oerrors; 904 splx(s); 905 return (rv); 906 } 907 908 if (! (ifp->if_flags & IFF_OACTIVE)) 909 (*ifp->if_start)(ifp); 910 911 /* 912 * Count output packets and bytes. 913 * The packet length includes header + additional hardware framing 914 * according to RFC 1333. 915 */ 916 ifp->if_obytes += len + sp->pp_framebytes; 917 splx(s); 918 return (0); 919 } 920 921 void 922 sppp_attach(struct ifnet *ifp) 923 { 924 struct sppp *sp = (struct sppp *) ifp; 925 926 /* Initialize keepalive handler. */ 927 if (! spppq) { 928 callout_init(&keepalive_ch); 929 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 930 } 931 932 /* Insert new entry into the keepalive list. */ 933 sp->pp_next = spppq; 934 spppq = sp; 935 936 sp->pp_if.if_type = IFT_PPP; 937 sp->pp_if.if_output = sppp_output; 938 sp->pp_fastq.ifq_maxlen = 32; 939 sp->pp_cpq.ifq_maxlen = 20; 940 sp->pp_loopcnt = 0; 941 sp->pp_alivecnt = 0; 942 sp->pp_last_activity = 0; 943 sp->pp_idle_timeout = 0; 944 memset(&sp->pp_seq[0], 0, sizeof(sp->pp_seq)); 945 memset(&sp->pp_rseq[0], 0, sizeof(sp->pp_rseq)); 946 sp->pp_auth_failures = 0; 947 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES; 948 sp->pp_phase = SPPP_PHASE_DEAD; 949 sp->pp_up = lcp.Up; 950 sp->pp_down = lcp.Down; 951 952 if_alloc_sadl(ifp); 953 954 memset(&sp->myauth, 0, sizeof sp->myauth); 955 memset(&sp->hisauth, 0, sizeof sp->hisauth); 956 sppp_lcp_init(sp); 957 sppp_ipcp_init(sp); 958 sppp_ipv6cp_init(sp); 959 sppp_pap_init(sp); 960 sppp_chap_init(sp); 961 } 962 963 void 964 sppp_detach(struct ifnet *ifp) 965 { 966 struct sppp **q, *p, *sp = (struct sppp *) ifp; 967 int i; 968 969 /* Remove the entry from the keepalive list. */ 970 for (q = &spppq; (p = *q); q = &p->pp_next) 971 if (p == sp) { 972 *q = p->pp_next; 973 break; 974 } 975 976 /* Stop keepalive handler. */ 977 if (! spppq) { 978 callout_stop(&keepalive_ch); 979 } 980 981 for (i = 0; i < IDX_COUNT; i++) { 982 callout_stop(&sp->ch[i]); 983 } 984 callout_stop(&sp->pap_my_to_ch); 985 986 /* free authentication info */ 987 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF); 988 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF); 989 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF); 990 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF); 991 992 if_free_sadl(ifp); 993 } 994 995 /* 996 * Flush the interface output queue. 997 */ 998 void 999 sppp_flush(struct ifnet *ifp) 1000 { 1001 struct sppp *sp = (struct sppp *) ifp; 1002 1003 IFQ_PURGE(&sp->pp_if.if_snd); 1004 IF_PURGE(&sp->pp_fastq); 1005 IF_PURGE(&sp->pp_cpq); 1006 } 1007 1008 /* 1009 * Check if the output queue is empty. 1010 */ 1011 int 1012 sppp_isempty(struct ifnet *ifp) 1013 { 1014 struct sppp *sp = (struct sppp *) ifp; 1015 int empty, s; 1016 1017 s = splnet(); 1018 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) && 1019 IFQ_IS_EMPTY(&sp->pp_if.if_snd); 1020 splx(s); 1021 return (empty); 1022 } 1023 1024 /* 1025 * Get next packet to send. 1026 */ 1027 struct mbuf * 1028 sppp_dequeue(struct ifnet *ifp) 1029 { 1030 struct sppp *sp = (struct sppp *) ifp; 1031 struct mbuf *m; 1032 int s; 1033 1034 s = splnet(); 1035 /* 1036 * Process only the control protocol queue until we have at 1037 * least one NCP open. 1038 * 1039 * Do always serve all three queues in Cisco mode. 1040 */ 1041 IF_DEQUEUE(&sp->pp_cpq, m); 1042 if (m == NULL && 1043 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) { 1044 IF_DEQUEUE(&sp->pp_fastq, m); 1045 if (m == NULL) 1046 IF_DEQUEUE(&sp->pp_if.if_snd, m); 1047 } 1048 splx(s); 1049 return m; 1050 } 1051 1052 /* 1053 * Pick the next packet, do not remove it from the queue. 1054 */ 1055 struct mbuf * 1056 sppp_pick(struct ifnet *ifp) 1057 { 1058 struct sppp *sp = (struct sppp *)ifp; 1059 struct mbuf *m; 1060 int s; 1061 1062 s= splnet(); 1063 1064 m = sp->pp_cpq.ifq_head; 1065 if (m == NULL && 1066 (sp->pp_phase == SPPP_PHASE_NETWORK || 1067 (sp->pp_flags & PP_CISCO) != 0)) 1068 if ((m = sp->pp_fastq.ifq_head) == NULL) 1069 m = sp->pp_if.if_snd.ifq_head; 1070 splx(s); 1071 return (m); 1072 } 1073 1074 /* 1075 * Process an ioctl request. Called on low priority level. 1076 */ 1077 int 1078 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1079 { 1080 struct ifreq *ifr = (struct ifreq *) data; 1081 struct sppp *sp = (struct sppp *) ifp; 1082 int s, error=0, going_up, going_down, newmode; 1083 1084 s = splnet(); 1085 switch (cmd) { 1086 case SIOCAIFADDR: 1087 case SIOCSIFDSTADDR: 1088 break; 1089 1090 case SIOCSIFADDR: 1091 if_up(ifp); 1092 /* fall through... */ 1093 1094 case SIOCSIFFLAGS: 1095 going_up = ifp->if_flags & IFF_UP && 1096 (ifp->if_flags & IFF_RUNNING) == 0; 1097 going_down = (ifp->if_flags & IFF_UP) == 0 && 1098 ifp->if_flags & IFF_RUNNING; 1099 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE); 1100 if (newmode == (IFF_AUTO | IFF_PASSIVE)) { 1101 /* sanity */ 1102 newmode = IFF_PASSIVE; 1103 ifp->if_flags &= ~IFF_AUTO; 1104 } 1105 1106 if (going_up || going_down) 1107 lcp.Close(sp); 1108 if (going_up && newmode == 0) { 1109 /* neither auto-dial nor passive */ 1110 ifp->if_flags |= IFF_RUNNING; 1111 if (!(sp->pp_flags & PP_CISCO)) 1112 lcp.Open(sp); 1113 } else if (going_down) { 1114 sppp_flush(ifp); 1115 ifp->if_flags &= ~IFF_RUNNING; 1116 } 1117 1118 break; 1119 1120 #ifdef SIOCSIFMTU 1121 #ifndef ifr_mtu 1122 #define ifr_mtu ifr_metric 1123 #endif 1124 case SIOCSIFMTU: 1125 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru) { 1126 error = EINVAL; 1127 break; 1128 } 1129 1130 ifp->if_mtu = ifr->ifr_mtu; 1131 break; 1132 #endif 1133 #ifdef SLIOCSETMTU 1134 case SLIOCSETMTU: 1135 if (*(short *)data < 128 || *(short *)data > sp->lcp.their_mru) 1136 { 1137 error = EINVAL; 1138 break; 1139 } 1140 1141 ifp->if_mtu = *(short *)data; 1142 break; 1143 #endif 1144 #ifdef SIOCGIFMTU 1145 case SIOCGIFMTU: 1146 ifr->ifr_mtu = ifp->if_mtu; 1147 break; 1148 #endif 1149 #ifdef SLIOCGETMTU 1150 case SLIOCGETMTU: 1151 *(short *)data = ifp->if_mtu; 1152 break; 1153 #endif 1154 case SIOCADDMULTI: 1155 case SIOCDELMULTI: 1156 break; 1157 1158 case SPPPSETAUTHCFG: 1159 case SPPPSETLCPCFG: 1160 case SPPPSETIDLETO: 1161 case SPPPSETAUTHFAILURE: 1162 case SPPPSETDNSOPTS: 1163 { 1164 struct proc *p = curproc; /* XXX */ 1165 1166 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1167 break; 1168 } 1169 /* FALLTHROUGH */ 1170 case SPPPGETAUTHCFG: 1171 case SPPPGETLCPCFG: 1172 case SPPPGETSTATUS: 1173 case SPPPGETIDLETO: 1174 case SPPPGETAUTHFAILURES: 1175 case SPPPGETDNSOPTS: 1176 case SPPPGETDNSADDRS: 1177 error = sppp_params(sp, cmd, data); 1178 break; 1179 1180 default: 1181 error = ENOTTY; 1182 } 1183 splx(s); 1184 return (error); 1185 } 1186 1187 1188 /* 1189 * Cisco framing implementation. 1190 */ 1191 1192 /* 1193 * Handle incoming Cisco keepalive protocol packets. 1194 */ 1195 static void 1196 sppp_cisco_input(struct sppp *sp, struct mbuf *m) 1197 { 1198 STDDCL; 1199 struct cisco_packet *h; 1200 u_int32_t me, mymask; 1201 1202 if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 1203 if (debug) 1204 log(LOG_DEBUG, 1205 "%s: cisco invalid packet length: %d bytes\n", 1206 ifp->if_xname, m->m_pkthdr.len); 1207 return; 1208 } 1209 h = mtod(m, struct cisco_packet *); 1210 if (debug) 1211 log(LOG_DEBUG, 1212 "%s: cisco input: %d bytes " 1213 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1214 ifp->if_xname, m->m_pkthdr.len, 1215 ntohl (h->type), h->par1, h->par2, (u_int)h->rel, 1216 (u_int)h->time0, (u_int)h->time1); 1217 switch (ntohl (h->type)) { 1218 default: 1219 if (debug) 1220 addlog("%s: cisco unknown packet type: 0x%x\n", 1221 ifp->if_xname, ntohl (h->type)); 1222 break; 1223 case CISCO_ADDR_REPLY: 1224 /* Reply on address request, ignore */ 1225 break; 1226 case CISCO_KEEPALIVE_REQ: 1227 sp->pp_alivecnt = 0; 1228 sp->pp_rseq[IDX_LCP] = ntohl (h->par1); 1229 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 1230 /* Local and remote sequence numbers are equal. 1231 * Probably, the line is in loopback mode. */ 1232 if (sp->pp_loopcnt >= MAXALIVECNT) { 1233 printf ("%s: loopback\n", 1234 ifp->if_xname); 1235 sp->pp_loopcnt = 0; 1236 if (ifp->if_flags & IFF_UP) { 1237 if_down(ifp); 1238 IF_PURGE(&sp->pp_cpq); 1239 } 1240 } 1241 ++sp->pp_loopcnt; 1242 1243 /* Generate new local sequence number */ 1244 sp->pp_seq[IDX_LCP] = random(); 1245 break; 1246 } 1247 sp->pp_loopcnt = 0; 1248 if (! (ifp->if_flags & IFF_UP) && 1249 (ifp->if_flags & IFF_RUNNING)) { 1250 if_up(ifp); 1251 } 1252 break; 1253 case CISCO_ADDR_REQ: 1254 sppp_get_ip_addrs(sp, &me, 0, &mymask); 1255 if (me != 0L) 1256 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 1257 break; 1258 } 1259 } 1260 1261 /* 1262 * Send Cisco keepalive packet. 1263 */ 1264 static void 1265 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2) 1266 { 1267 STDDCL; 1268 struct ppp_header *h; 1269 struct cisco_packet *ch; 1270 struct mbuf *m; 1271 u_int32_t t = (time.tv_sec - boottime.tv_sec) * 1000; 1272 1273 MGETHDR(m, M_DONTWAIT, MT_DATA); 1274 if (! m) 1275 return; 1276 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 1277 m->m_pkthdr.rcvif = 0; 1278 1279 h = mtod(m, struct ppp_header *); 1280 h->address = CISCO_MULTICAST; 1281 h->control = 0; 1282 h->protocol = htons(CISCO_KEEPALIVE); 1283 1284 ch = (struct cisco_packet *)(h + 1); 1285 ch->type = htonl(type); 1286 ch->par1 = htonl(par1); 1287 ch->par2 = htonl(par2); 1288 ch->rel = -1; 1289 1290 ch->time0 = htons((u_short)(t >> 16)); 1291 ch->time1 = htons((u_short) t); 1292 1293 if (debug) 1294 log(LOG_DEBUG, 1295 "%s: cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n", 1296 ifp->if_xname, ntohl (ch->type), ch->par1, 1297 ch->par2, (u_int)ch->rel, (u_int)ch->time0, 1298 (u_int)ch->time1); 1299 1300 if (IF_QFULL(&sp->pp_cpq)) { 1301 IF_DROP(&sp->pp_fastq); 1302 IF_DROP(&ifp->if_snd); 1303 m_freem(m); 1304 ++ifp->if_oerrors; 1305 return; 1306 } else 1307 IF_ENQUEUE(&sp->pp_cpq, m); 1308 if (! (ifp->if_flags & IFF_OACTIVE)) 1309 (*ifp->if_start)(ifp); 1310 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1311 } 1312 1313 /* 1314 * PPP protocol implementation. 1315 */ 1316 1317 /* 1318 * Send PPP control protocol packet. 1319 */ 1320 static void 1321 sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 1322 u_char ident, u_short len, void *data) 1323 { 1324 STDDCL; 1325 struct lcp_header *lh; 1326 struct mbuf *m; 1327 size_t pkthdrlen; 1328 1329 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN; 1330 1331 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) 1332 len = MHLEN - pkthdrlen - LCP_HEADER_LEN; 1333 MGETHDR(m, M_DONTWAIT, MT_DATA); 1334 if (! m) 1335 return; 1336 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 1337 m->m_pkthdr.rcvif = 0; 1338 1339 if (sp->pp_flags & PP_NOFRAMING) { 1340 *mtod(m, u_int16_t *) = htons(proto); 1341 lh = (struct lcp_header *)(mtod(m, u_int8_t *) + 2); 1342 } else { 1343 struct ppp_header *h; 1344 h = mtod(m, struct ppp_header *); 1345 h->address = PPP_ALLSTATIONS; /* broadcast address */ 1346 h->control = PPP_UI; /* Unnumbered Info */ 1347 h->protocol = htons(proto); /* Link Control Protocol */ 1348 lh = (struct lcp_header *)(h + 1); 1349 } 1350 lh->type = type; 1351 lh->ident = ident; 1352 lh->len = htons(LCP_HEADER_LEN + len); 1353 if (len) 1354 bcopy (data, lh + 1, len); 1355 1356 if (debug) { 1357 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 1358 ifp->if_xname, 1359 sppp_proto_name(proto), 1360 sppp_cp_type_name(lh->type), lh->ident, ntohs(lh->len)); 1361 if (len) 1362 sppp_print_bytes((u_char *)(lh + 1), len); 1363 addlog(">\n"); 1364 } 1365 if (IF_QFULL(&sp->pp_cpq)) { 1366 IF_DROP(&sp->pp_fastq); 1367 IF_DROP(&ifp->if_snd); 1368 m_freem(m); 1369 ++ifp->if_oerrors; 1370 return; 1371 } else 1372 IF_ENQUEUE(&sp->pp_cpq, m); 1373 if (! (ifp->if_flags & IFF_OACTIVE)) 1374 (*ifp->if_start)(ifp); 1375 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes; 1376 } 1377 1378 /* 1379 * Handle incoming PPP control protocol packets. 1380 */ 1381 static void 1382 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 1383 { 1384 STDDCL; 1385 struct lcp_header *h; 1386 int len = m->m_pkthdr.len; 1387 int rv; 1388 u_char *p; 1389 u_int32_t u32; 1390 1391 if (len < 4) { 1392 if (debug) 1393 log(LOG_DEBUG, 1394 "%s: %s invalid packet length: %d bytes\n", 1395 ifp->if_xname, cp->name, len); 1396 return; 1397 } 1398 h = mtod(m, struct lcp_header *); 1399 if (debug) { 1400 log(LOG_DEBUG, 1401 "%s: %s input(%s): <%s id=0x%x len=%d", 1402 ifp->if_xname, cp->name, 1403 sppp_state_name(sp->state[cp->protoidx]), 1404 sppp_cp_type_name(h->type), h->ident, ntohs(h->len)); 1405 if (len > 4) 1406 sppp_print_bytes((u_char *)(h + 1), len - 4); 1407 addlog(">\n"); 1408 } 1409 if (len > ntohs(h->len)) 1410 len = ntohs(h->len); 1411 p = (u_char *)(h + 1); 1412 switch (h->type) { 1413 case CONF_REQ: 1414 if (len < 4) { 1415 if (debug) 1416 addlog("%s: %s invalid conf-req length %d\n", 1417 ifp->if_xname, cp->name, 1418 len); 1419 ++ifp->if_ierrors; 1420 break; 1421 } 1422 /* handle states where RCR doesn't get a SCA/SCN */ 1423 switch (sp->state[cp->protoidx]) { 1424 case STATE_CLOSING: 1425 case STATE_STOPPING: 1426 return; 1427 case STATE_CLOSED: 1428 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 1429 0, 0); 1430 return; 1431 } 1432 rv = (cp->RCR)(sp, h, len); 1433 switch (sp->state[cp->protoidx]) { 1434 case STATE_OPENED: 1435 (cp->tld)(sp); 1436 (cp->scr)(sp); 1437 /* fall through... */ 1438 case STATE_ACK_SENT: 1439 case STATE_REQ_SENT: 1440 sppp_cp_change_state(cp, sp, rv? 1441 STATE_ACK_SENT: STATE_REQ_SENT); 1442 break; 1443 case STATE_STOPPED: 1444 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1445 (cp->scr)(sp); 1446 sppp_cp_change_state(cp, sp, rv? 1447 STATE_ACK_SENT: STATE_REQ_SENT); 1448 break; 1449 case STATE_ACK_RCVD: 1450 if (rv) { 1451 sppp_cp_change_state(cp, sp, STATE_OPENED); 1452 if (debug) 1453 log(LOG_DEBUG, "%s: %s tlu\n", 1454 ifp->if_xname, 1455 cp->name); 1456 (cp->tlu)(sp); 1457 } else 1458 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1459 break; 1460 default: 1461 printf("%s: %s illegal %s in state %s\n", 1462 ifp->if_xname, cp->name, 1463 sppp_cp_type_name(h->type), 1464 sppp_state_name(sp->state[cp->protoidx])); 1465 ++ifp->if_ierrors; 1466 } 1467 break; 1468 case CONF_ACK: 1469 if (h->ident != sp->confid[cp->protoidx]) { 1470 if (debug) 1471 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1472 ifp->if_xname, cp->name, 1473 h->ident, sp->confid[cp->protoidx]); 1474 ++ifp->if_ierrors; 1475 break; 1476 } 1477 switch (sp->state[cp->protoidx]) { 1478 case STATE_CLOSED: 1479 case STATE_STOPPED: 1480 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1481 break; 1482 case STATE_CLOSING: 1483 case STATE_STOPPING: 1484 break; 1485 case STATE_REQ_SENT: 1486 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1487 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1488 break; 1489 case STATE_OPENED: 1490 (cp->tld)(sp); 1491 /* fall through */ 1492 case STATE_ACK_RCVD: 1493 (cp->scr)(sp); 1494 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1495 break; 1496 case STATE_ACK_SENT: 1497 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1498 sppp_cp_change_state(cp, sp, STATE_OPENED); 1499 if (debug) 1500 log(LOG_DEBUG, "%s: %s tlu\n", 1501 ifp->if_xname, cp->name); 1502 (cp->tlu)(sp); 1503 break; 1504 default: 1505 printf("%s: %s illegal %s in state %s\n", 1506 ifp->if_xname, cp->name, 1507 sppp_cp_type_name(h->type), 1508 sppp_state_name(sp->state[cp->protoidx])); 1509 ++ifp->if_ierrors; 1510 } 1511 break; 1512 case CONF_NAK: 1513 case CONF_REJ: 1514 if (h->ident != sp->confid[cp->protoidx]) { 1515 if (debug) 1516 addlog("%s: %s id mismatch 0x%x != 0x%x\n", 1517 ifp->if_xname, cp->name, 1518 h->ident, sp->confid[cp->protoidx]); 1519 ++ifp->if_ierrors; 1520 break; 1521 } 1522 if (h->type == CONF_NAK) 1523 (cp->RCN_nak)(sp, h, len); 1524 else /* CONF_REJ */ 1525 (cp->RCN_rej)(sp, h, len); 1526 1527 switch (sp->state[cp->protoidx]) { 1528 case STATE_CLOSED: 1529 case STATE_STOPPED: 1530 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1531 break; 1532 case STATE_REQ_SENT: 1533 case STATE_ACK_SENT: 1534 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1535 (cp->scr)(sp); 1536 break; 1537 case STATE_OPENED: 1538 (cp->tld)(sp); 1539 /* fall through */ 1540 case STATE_ACK_RCVD: 1541 sppp_cp_change_state(cp, sp, STATE_ACK_SENT); 1542 (cp->scr)(sp); 1543 break; 1544 case STATE_CLOSING: 1545 case STATE_STOPPING: 1546 break; 1547 default: 1548 printf("%s: %s illegal %s in state %s\n", 1549 ifp->if_xname, cp->name, 1550 sppp_cp_type_name(h->type), 1551 sppp_state_name(sp->state[cp->protoidx])); 1552 ++ifp->if_ierrors; 1553 } 1554 break; 1555 1556 case TERM_REQ: 1557 switch (sp->state[cp->protoidx]) { 1558 case STATE_ACK_RCVD: 1559 case STATE_ACK_SENT: 1560 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1561 /* fall through */ 1562 case STATE_CLOSED: 1563 case STATE_STOPPED: 1564 case STATE_CLOSING: 1565 case STATE_STOPPING: 1566 case STATE_REQ_SENT: 1567 sta: 1568 /* Send Terminate-Ack packet. */ 1569 if (debug) 1570 log(LOG_DEBUG, "%s: %s send terminate-ack\n", 1571 ifp->if_xname, cp->name); 1572 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 1573 break; 1574 case STATE_OPENED: 1575 (cp->tld)(sp); 1576 sp->rst_counter[cp->protoidx] = 0; 1577 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1578 goto sta; 1579 default: 1580 printf("%s: %s illegal %s in state %s\n", 1581 ifp->if_xname, cp->name, 1582 sppp_cp_type_name(h->type), 1583 sppp_state_name(sp->state[cp->protoidx])); 1584 ++ifp->if_ierrors; 1585 } 1586 break; 1587 case TERM_ACK: 1588 switch (sp->state[cp->protoidx]) { 1589 case STATE_CLOSED: 1590 case STATE_STOPPED: 1591 case STATE_REQ_SENT: 1592 case STATE_ACK_SENT: 1593 break; 1594 case STATE_CLOSING: 1595 (cp->tlf)(sp); 1596 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1597 sppp_lcp_check_and_close(sp); 1598 break; 1599 case STATE_STOPPING: 1600 (cp->tlf)(sp); 1601 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1602 sppp_lcp_check_and_close(sp); 1603 break; 1604 case STATE_ACK_RCVD: 1605 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1606 break; 1607 case STATE_OPENED: 1608 (cp->tld)(sp); 1609 (cp->scr)(sp); 1610 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 1611 break; 1612 default: 1613 printf("%s: %s illegal %s in state %s\n", 1614 ifp->if_xname, cp->name, 1615 sppp_cp_type_name(h->type), 1616 sppp_state_name(sp->state[cp->protoidx])); 1617 ++ifp->if_ierrors; 1618 } 1619 break; 1620 case CODE_REJ: 1621 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1622 log(LOG_INFO, 1623 "%s: %s: ignoring RXJ (%s) for code ?, " 1624 "danger will robinson\n", 1625 ifp->if_xname, cp->name, 1626 sppp_cp_type_name(h->type)); 1627 switch (sp->state[cp->protoidx]) { 1628 case STATE_CLOSED: 1629 case STATE_STOPPED: 1630 case STATE_REQ_SENT: 1631 case STATE_ACK_SENT: 1632 case STATE_CLOSING: 1633 case STATE_STOPPING: 1634 case STATE_OPENED: 1635 break; 1636 case STATE_ACK_RCVD: 1637 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1638 break; 1639 default: 1640 printf("%s: %s illegal %s in state %s\n", 1641 ifp->if_xname, cp->name, 1642 sppp_cp_type_name(h->type), 1643 sppp_state_name(sp->state[cp->protoidx])); 1644 ++ifp->if_ierrors; 1645 } 1646 break; 1647 case PROTO_REJ: 1648 { 1649 int catastrophic; 1650 const struct cp *upper; 1651 int i; 1652 u_int16_t proto; 1653 1654 catastrophic = 0; 1655 upper = NULL; 1656 proto = p[0] << 8 | p[1]; 1657 for (i = 0; i < IDX_COUNT; i++) { 1658 if (cps[i]->proto == proto) { 1659 upper = cps[i]; 1660 break; 1661 } 1662 } 1663 if (upper == NULL) 1664 catastrophic++; 1665 1666 if (debug) 1667 log(LOG_INFO, 1668 "%s: %s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 1669 ifp->if_xname, cp->name, catastrophic ? '-' : '+', 1670 sppp_cp_type_name(h->type), proto, 1671 upper ? upper->name : "unknown", 1672 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 1673 1674 /* 1675 * if we got RXJ+ against conf-req, the peer does not implement 1676 * this particular protocol type. terminate the protocol. 1677 */ 1678 if (upper && !catastrophic) { 1679 if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 1680 upper->Close(sp); 1681 break; 1682 } 1683 } 1684 1685 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 1686 switch (sp->state[cp->protoidx]) { 1687 case STATE_CLOSED: 1688 case STATE_STOPPED: 1689 case STATE_REQ_SENT: 1690 case STATE_ACK_SENT: 1691 case STATE_CLOSING: 1692 case STATE_STOPPING: 1693 case STATE_OPENED: 1694 break; 1695 case STATE_ACK_RCVD: 1696 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1697 break; 1698 default: 1699 printf("%s: %s illegal %s in state %s\n", 1700 ifp->if_xname, cp->name, 1701 sppp_cp_type_name(h->type), 1702 sppp_state_name(sp->state[cp->protoidx])); 1703 ++ifp->if_ierrors; 1704 } 1705 break; 1706 } 1707 case DISC_REQ: 1708 if (cp->proto != PPP_LCP) 1709 goto illegal; 1710 /* Discard the packet. */ 1711 break; 1712 case ECHO_REQ: 1713 if (cp->proto != PPP_LCP) 1714 goto illegal; 1715 if (sp->state[cp->protoidx] != STATE_OPENED) { 1716 if (debug) 1717 addlog("%s: lcp echo req but lcp closed\n", 1718 ifp->if_xname); 1719 ++ifp->if_ierrors; 1720 break; 1721 } 1722 if (len < 8) { 1723 if (debug) 1724 addlog("%s: invalid lcp echo request " 1725 "packet length: %d bytes\n", 1726 ifp->if_xname, len); 1727 break; 1728 } 1729 memcpy(&u32, h + 1, sizeof u32); 1730 if (ntohl(u32) == sp->lcp.magic) { 1731 /* Line loopback mode detected. */ 1732 printf("%s: loopback\n", ifp->if_xname); 1733 if_down(ifp); 1734 IF_PURGE(&sp->pp_cpq); 1735 1736 /* Shut down the PPP link. */ 1737 /* XXX */ 1738 lcp.Down(sp); 1739 lcp.Up(sp); 1740 break; 1741 } 1742 u32 = htonl(sp->lcp.magic); 1743 memcpy(h + 1, &u32, sizeof u32); 1744 if (debug) 1745 addlog("%s: got lcp echo req, sending echo rep\n", 1746 ifp->if_xname); 1747 sppp_cp_send(sp, PPP_LCP, ECHO_REPLY, h->ident, len - 4, 1748 h + 1); 1749 break; 1750 case ECHO_REPLY: 1751 if (cp->proto != PPP_LCP) 1752 goto illegal; 1753 if (h->ident != sp->lcp.echoid) { 1754 ++ifp->if_ierrors; 1755 break; 1756 } 1757 if (len < 8) { 1758 if (debug) 1759 addlog("%s: lcp invalid echo reply " 1760 "packet length: %d bytes\n", 1761 ifp->if_xname, len); 1762 break; 1763 } 1764 if (debug) 1765 addlog("%s: lcp got echo rep\n", 1766 ifp->if_xname); 1767 memcpy(&u32, h + 1, sizeof u32); 1768 if (ntohl(u32) != sp->lcp.magic) 1769 sp->pp_alivecnt = 0; 1770 break; 1771 default: 1772 /* Unknown packet type -- send Code-Reject packet. */ 1773 illegal: 1774 if (debug) 1775 addlog("%s: %s send code-rej for 0x%x\n", 1776 ifp->if_xname, cp->name, h->type); 1777 sppp_cp_send(sp, cp->proto, CODE_REJ, 1778 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 1779 ++ifp->if_ierrors; 1780 } 1781 } 1782 1783 1784 /* 1785 * The generic part of all Up/Down/Open/Close/TO event handlers. 1786 * Basically, the state transition handling in the automaton. 1787 */ 1788 static void 1789 sppp_up_event(const struct cp *cp, struct sppp *sp) 1790 { 1791 STDDCL; 1792 1793 if (debug) 1794 log(LOG_DEBUG, "%s: %s up(%s)\n", 1795 ifp->if_xname, cp->name, 1796 sppp_state_name(sp->state[cp->protoidx])); 1797 1798 switch (sp->state[cp->protoidx]) { 1799 case STATE_INITIAL: 1800 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1801 break; 1802 case STATE_STARTING: 1803 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1804 (cp->scr)(sp); 1805 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1806 break; 1807 default: 1808 printf("%s: %s illegal up in state %s\n", 1809 ifp->if_xname, cp->name, 1810 sppp_state_name(sp->state[cp->protoidx])); 1811 } 1812 } 1813 1814 static void 1815 sppp_down_event(const struct cp *cp, struct sppp *sp) 1816 { 1817 STDDCL; 1818 1819 if (debug) 1820 log(LOG_DEBUG, "%s: %s down(%s)\n", 1821 ifp->if_xname, cp->name, 1822 sppp_state_name(sp->state[cp->protoidx])); 1823 1824 switch (sp->state[cp->protoidx]) { 1825 case STATE_CLOSED: 1826 case STATE_CLOSING: 1827 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1828 break; 1829 case STATE_STOPPED: 1830 (cp->tls)(sp); 1831 /* fall through */ 1832 case STATE_STOPPING: 1833 case STATE_REQ_SENT: 1834 case STATE_ACK_RCVD: 1835 case STATE_ACK_SENT: 1836 sppp_cp_change_state(cp, sp, STATE_STARTING); 1837 break; 1838 case STATE_OPENED: 1839 (cp->tld)(sp); 1840 sppp_cp_change_state(cp, sp, STATE_STARTING); 1841 break; 1842 default: 1843 printf("%s: %s illegal down in state %s\n", 1844 ifp->if_xname, cp->name, 1845 sppp_state_name(sp->state[cp->protoidx])); 1846 } 1847 } 1848 1849 1850 static void 1851 sppp_open_event(const struct cp *cp, struct sppp *sp) 1852 { 1853 STDDCL; 1854 1855 if (debug) 1856 log(LOG_DEBUG, "%s: %s open(%s)\n", 1857 ifp->if_xname, cp->name, 1858 sppp_state_name(sp->state[cp->protoidx])); 1859 1860 switch (sp->state[cp->protoidx]) { 1861 case STATE_INITIAL: 1862 (cp->tls)(sp); 1863 sppp_cp_change_state(cp, sp, STATE_STARTING); 1864 break; 1865 case STATE_STARTING: 1866 break; 1867 case STATE_CLOSED: 1868 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 1869 (cp->scr)(sp); 1870 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1871 break; 1872 case STATE_STOPPED: 1873 case STATE_STOPPING: 1874 case STATE_REQ_SENT: 1875 case STATE_ACK_RCVD: 1876 case STATE_ACK_SENT: 1877 case STATE_OPENED: 1878 break; 1879 case STATE_CLOSING: 1880 sppp_cp_change_state(cp, sp, STATE_STOPPING); 1881 break; 1882 } 1883 } 1884 1885 1886 static void 1887 sppp_close_event(const struct cp *cp, struct sppp *sp) 1888 { 1889 STDDCL; 1890 1891 if (debug) 1892 log(LOG_DEBUG, "%s: %s close(%s)\n", 1893 ifp->if_xname, cp->name, 1894 sppp_state_name(sp->state[cp->protoidx])); 1895 1896 switch (sp->state[cp->protoidx]) { 1897 case STATE_INITIAL: 1898 case STATE_CLOSED: 1899 case STATE_CLOSING: 1900 break; 1901 case STATE_STARTING: 1902 (cp->tlf)(sp); 1903 sppp_cp_change_state(cp, sp, STATE_INITIAL); 1904 break; 1905 case STATE_STOPPED: 1906 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1907 break; 1908 case STATE_STOPPING: 1909 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1910 break; 1911 case STATE_OPENED: 1912 (cp->tld)(sp); 1913 /* fall through */ 1914 case STATE_REQ_SENT: 1915 case STATE_ACK_RCVD: 1916 case STATE_ACK_SENT: 1917 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 1918 sppp_cp_send(sp, cp->proto, TERM_REQ, 1919 ++sp->pp_seq[cp->protoidx], 0, 0); 1920 sppp_cp_change_state(cp, sp, STATE_CLOSING); 1921 break; 1922 } 1923 } 1924 1925 static void 1926 sppp_to_event(const struct cp *cp, struct sppp *sp) 1927 { 1928 STDDCL; 1929 int s; 1930 1931 s = splnet(); 1932 if (debug) 1933 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n", 1934 ifp->if_xname, cp->name, 1935 sppp_state_name(sp->state[cp->protoidx]), 1936 sp->rst_counter[cp->protoidx]); 1937 1938 if (--sp->rst_counter[cp->protoidx] < 0) 1939 /* TO- event */ 1940 switch (sp->state[cp->protoidx]) { 1941 case STATE_CLOSING: 1942 (cp->tlf)(sp); 1943 sppp_cp_change_state(cp, sp, STATE_CLOSED); 1944 sppp_lcp_check_and_close(sp); 1945 break; 1946 case STATE_STOPPING: 1947 (cp->tlf)(sp); 1948 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1949 sppp_lcp_check_and_close(sp); 1950 break; 1951 case STATE_REQ_SENT: 1952 case STATE_ACK_RCVD: 1953 case STATE_ACK_SENT: 1954 (cp->tlf)(sp); 1955 sppp_cp_change_state(cp, sp, STATE_STOPPED); 1956 sppp_lcp_check_and_close(sp); 1957 break; 1958 } 1959 else 1960 /* TO+ event */ 1961 switch (sp->state[cp->protoidx]) { 1962 case STATE_CLOSING: 1963 case STATE_STOPPING: 1964 sppp_cp_send(sp, cp->proto, TERM_REQ, 1965 ++sp->pp_seq[cp->protoidx], 0, 0); 1966 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1967 cp->TO, sp); 1968 break; 1969 case STATE_REQ_SENT: 1970 case STATE_ACK_RCVD: 1971 (cp->scr)(sp); 1972 /* sppp_cp_change_state() will restart the timer */ 1973 sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 1974 break; 1975 case STATE_ACK_SENT: 1976 (cp->scr)(sp); 1977 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 1978 cp->TO, sp); 1979 break; 1980 } 1981 1982 splx(s); 1983 } 1984 1985 /* 1986 * Change the state of a control protocol in the state automaton. 1987 * Takes care of starting/stopping the restart timer. 1988 */ 1989 void 1990 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 1991 { 1992 sp->state[cp->protoidx] = newstate; 1993 callout_stop(&sp->ch[cp->protoidx]); 1994 switch (newstate) { 1995 case STATE_INITIAL: 1996 case STATE_STARTING: 1997 case STATE_CLOSED: 1998 case STATE_STOPPED: 1999 case STATE_OPENED: 2000 break; 2001 case STATE_CLOSING: 2002 case STATE_STOPPING: 2003 case STATE_REQ_SENT: 2004 case STATE_ACK_RCVD: 2005 case STATE_ACK_SENT: 2006 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout, 2007 cp->TO, sp); 2008 break; 2009 } 2010 } 2011 2012 /* 2013 *--------------------------------------------------------------------------* 2014 * * 2015 * The LCP implementation. * 2016 * * 2017 *--------------------------------------------------------------------------* 2018 */ 2019 static void 2020 sppp_lcp_init(struct sppp *sp) 2021 { 2022 sp->lcp.opts = (1 << LCP_OPT_MAGIC); 2023 sp->lcp.magic = 0; 2024 sp->state[IDX_LCP] = STATE_INITIAL; 2025 sp->fail_counter[IDX_LCP] = 0; 2026 sp->pp_seq[IDX_LCP] = 0; 2027 sp->pp_rseq[IDX_LCP] = 0; 2028 sp->lcp.protos = 0; 2029 sp->lcp.mru = sp->lcp.their_mru = PP_MTU; 2030 2031 /* 2032 * Initialize counters and timeout values. Note that we don't 2033 * use the 3 seconds suggested in RFC 1661 since we are likely 2034 * running on a fast link. XXX We should probably implement 2035 * the exponential backoff option. Note that these values are 2036 * relevant for all control protocols, not just LCP only. 2037 */ 2038 sp->lcp.timeout = 1 * hz; 2039 sp->lcp.max_terminate = 2; 2040 sp->lcp.max_configure = 10; 2041 sp->lcp.max_failure = 10; 2042 callout_init(&sp->ch[IDX_LCP]); 2043 } 2044 2045 static void 2046 sppp_lcp_up(struct sppp *sp) 2047 { 2048 STDDCL; 2049 2050 /* Initialize activity timestamp: opening a connection is an activity */ 2051 sp->pp_last_activity = mono_time.tv_sec; 2052 2053 /* 2054 * If this interface is passive or dial-on-demand, and we are 2055 * still in Initial state, it means we've got an incoming 2056 * call. Activate the interface. 2057 */ 2058 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 2059 if (debug) 2060 log(LOG_DEBUG, 2061 "%s: Up event", ifp->if_xname); 2062 ifp->if_flags |= IFF_RUNNING; 2063 if (sp->state[IDX_LCP] == STATE_INITIAL) { 2064 if (debug) 2065 addlog("(incoming call)\n"); 2066 sp->pp_flags |= PP_CALLIN; 2067 lcp.Open(sp); 2068 } else if (debug) 2069 addlog("\n"); 2070 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 && 2071 (sp->state[IDX_LCP] == STATE_INITIAL)) { 2072 ifp->if_flags |= IFF_RUNNING; 2073 lcp.Open(sp); 2074 } 2075 2076 sppp_up_event(&lcp, sp); 2077 } 2078 2079 static void 2080 sppp_lcp_down(struct sppp *sp) 2081 { 2082 STDDCL; 2083 2084 sppp_down_event(&lcp, sp); 2085 2086 /* 2087 * If this is neither a dial-on-demand nor a passive 2088 * interface, simulate an ``ifconfig down'' action, so the 2089 * administrator can force a redial by another ``ifconfig 2090 * up''. XXX For leased line operation, should we immediately 2091 * try to reopen the connection here? 2092 */ 2093 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 2094 if (debug) 2095 log(LOG_INFO, 2096 "%s: Down event (carrier loss), taking interface down.\n", 2097 ifp->if_xname); 2098 if_down(ifp); 2099 } else { 2100 if (debug) 2101 log(LOG_DEBUG, 2102 "%s: Down event (carrier loss)\n", 2103 ifp->if_xname); 2104 } 2105 sp->pp_flags &= ~PP_CALLIN; 2106 if (sp->state[IDX_LCP] != STATE_INITIAL) 2107 lcp.Close(sp); 2108 ifp->if_flags &= ~IFF_RUNNING; 2109 } 2110 2111 static void 2112 sppp_lcp_open(struct sppp *sp) 2113 { 2114 /* 2115 * If we are authenticator, negotiate LCP_AUTH 2116 */ 2117 if (sp->hisauth.proto != 0) 2118 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 2119 else 2120 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2121 sp->pp_flags &= ~PP_NEEDAUTH; 2122 sppp_open_event(&lcp, sp); 2123 } 2124 2125 static void 2126 sppp_lcp_close(struct sppp *sp) 2127 { 2128 sppp_close_event(&lcp, sp); 2129 } 2130 2131 static void 2132 sppp_lcp_TO(void *cookie) 2133 { 2134 sppp_to_event(&lcp, (struct sppp *)cookie); 2135 } 2136 2137 /* 2138 * Analyze a configure request. Return true if it was agreeable, and 2139 * caused action sca, false if it has been rejected or nak'ed, and 2140 * caused action scn. (The return value is used to make the state 2141 * transition decision in the state automaton.) 2142 */ 2143 static int 2144 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2145 { 2146 STDDCL; 2147 u_char *buf, *r, *p; 2148 int origlen, rlen; 2149 u_int32_t nmagic; 2150 u_short authproto; 2151 2152 len -= 4; 2153 origlen = len; 2154 buf = r = malloc (len, M_TEMP, M_NOWAIT); 2155 if (! buf) 2156 return (0); 2157 2158 if (debug) 2159 log(LOG_DEBUG, "%s: lcp parse opts:", 2160 ifp->if_xname); 2161 2162 /* pass 1: check for things that need to be rejected */ 2163 p = (void *)(h + 1); 2164 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2165 if (debug) 2166 addlog(" %s", sppp_lcp_opt_name(*p)); 2167 switch (*p) { 2168 case LCP_OPT_MAGIC: 2169 /* Magic number. */ 2170 /* fall through, both are same length */ 2171 case LCP_OPT_ASYNC_MAP: 2172 /* Async control character map. */ 2173 if (len >= 6 || p[1] == 6) 2174 continue; 2175 if (debug) 2176 addlog(" [invalid]"); 2177 break; 2178 case LCP_OPT_MRU: 2179 /* Maximum receive unit. */ 2180 if (len >= 4 && p[1] == 4) 2181 continue; 2182 if (debug) 2183 addlog(" [invalid]"); 2184 break; 2185 case LCP_OPT_AUTH_PROTO: 2186 if (len < 4) { 2187 if (debug) 2188 addlog(" [invalid]"); 2189 break; 2190 } 2191 authproto = (p[2] << 8) + p[3]; 2192 if (authproto == PPP_CHAP && p[1] != 5) { 2193 if (debug) 2194 addlog(" [invalid chap len]"); 2195 break; 2196 } 2197 if (sp->myauth.proto == 0) { 2198 /* we are not configured to do auth */ 2199 if (debug) 2200 addlog(" [not configured]"); 2201 break; 2202 } 2203 /* 2204 * Remote want us to authenticate, remember this, 2205 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got 2206 * up. 2207 */ 2208 sp->pp_flags |= PP_NEEDAUTH; 2209 continue; 2210 default: 2211 /* Others not supported. */ 2212 if (debug) 2213 addlog(" [rej]"); 2214 break; 2215 } 2216 /* Add the option to rejected list. */ 2217 bcopy (p, r, p[1]); 2218 r += p[1]; 2219 rlen += p[1]; 2220 } 2221 if (rlen) { 2222 if (debug) 2223 addlog(" send conf-rej\n"); 2224 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2225 goto end; 2226 } else if (debug) 2227 addlog("\n"); 2228 2229 /* 2230 * pass 2: check for option values that are unacceptable and 2231 * thus require to be nak'ed. 2232 */ 2233 if (debug) 2234 log(LOG_DEBUG, "%s: lcp parse opt values: ", 2235 ifp->if_xname); 2236 2237 p = (void *)(h + 1); 2238 len = origlen; 2239 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2240 if (debug) 2241 addlog(" %s", sppp_lcp_opt_name(*p)); 2242 switch (*p) { 2243 case LCP_OPT_MAGIC: 2244 /* Magic number -- extract. */ 2245 nmagic = (u_int32_t)p[2] << 24 | 2246 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2247 if (nmagic != sp->lcp.magic) { 2248 if (debug) 2249 addlog(" 0x%x", nmagic); 2250 continue; 2251 } 2252 /* 2253 * Local and remote magics equal -- loopback? 2254 */ 2255 if (sp->pp_loopcnt >= MAXALIVECNT*5) { 2256 printf ("%s: loopback\n", 2257 ifp->if_xname); 2258 sp->pp_loopcnt = 0; 2259 if (ifp->if_flags & IFF_UP) { 2260 if_down(ifp); 2261 IF_PURGE(&sp->pp_cpq); 2262 /* XXX ? */ 2263 lcp.Down(sp); 2264 lcp.Up(sp); 2265 } 2266 } else if (debug) 2267 addlog(" [glitch]"); 2268 ++sp->pp_loopcnt; 2269 /* 2270 * We negate our magic here, and NAK it. If 2271 * we see it later in an NAK packet, we 2272 * suggest a new one. 2273 */ 2274 nmagic = ~sp->lcp.magic; 2275 /* Gonna NAK it. */ 2276 p[2] = nmagic >> 24; 2277 p[3] = nmagic >> 16; 2278 p[4] = nmagic >> 8; 2279 p[5] = nmagic; 2280 break; 2281 2282 case LCP_OPT_ASYNC_MAP: 2283 /* 2284 * Async control character map -- just ignore it. 2285 * 2286 * Quote from RFC 1662, chapter 6: 2287 * To enable this functionality, synchronous PPP 2288 * implementations MUST always respond to the 2289 * Async-Control-Character-Map Configuration 2290 * Option with the LCP Configure-Ack. However, 2291 * acceptance of the Configuration Option does 2292 * not imply that the synchronous implementation 2293 * will do any ACCM mapping. Instead, all such 2294 * octet mapping will be performed by the 2295 * asynchronous-to-synchronous converter. 2296 */ 2297 continue; 2298 2299 case LCP_OPT_MRU: 2300 /* 2301 * Maximum receive unit. Always agreeable, 2302 * but ignored by now. 2303 */ 2304 sp->lcp.their_mru = p[2] * 256 + p[3]; 2305 if (debug) 2306 addlog(" %ld", sp->lcp.their_mru); 2307 continue; 2308 2309 case LCP_OPT_AUTH_PROTO: 2310 authproto = (p[2] << 8) + p[3]; 2311 if (sp->myauth.proto != authproto) { 2312 /* not agreed, nak */ 2313 if (debug) 2314 addlog(" [mine %s != his %s]", 2315 sppp_proto_name(sp->hisauth.proto), 2316 sppp_proto_name(authproto)); 2317 p[2] = sp->myauth.proto >> 8; 2318 p[3] = sp->myauth.proto; 2319 break; 2320 } 2321 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 2322 if (debug) 2323 addlog(" [chap not MD5]"); 2324 p[4] = CHAP_MD5; 2325 break; 2326 } 2327 continue; 2328 } 2329 /* Add the option to nak'ed list. */ 2330 bcopy (p, r, p[1]); 2331 r += p[1]; 2332 rlen += p[1]; 2333 } 2334 if (rlen) { 2335 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 2336 if (debug) 2337 addlog(" max_failure (%d) exceeded, " 2338 "send conf-rej\n", 2339 sp->lcp.max_failure); 2340 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 2341 } else { 2342 if (debug) 2343 addlog(" send conf-nak\n"); 2344 sppp_cp_send(sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 2345 } 2346 goto end; 2347 } else { 2348 if (debug) 2349 addlog(" send conf-ack\n"); 2350 sp->fail_counter[IDX_LCP] = 0; 2351 sp->pp_loopcnt = 0; 2352 sppp_cp_send(sp, PPP_LCP, CONF_ACK, h->ident, origlen, h + 1); 2353 } 2354 2355 end: 2356 free(buf, M_TEMP); 2357 return (rlen == 0); 2358 } 2359 2360 /* 2361 * Analyze the LCP Configure-Reject option list, and adjust our 2362 * negotiation. 2363 */ 2364 static void 2365 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2366 { 2367 STDDCL; 2368 u_char *buf, *p; 2369 2370 len -= 4; 2371 buf = malloc (len, M_TEMP, M_NOWAIT); 2372 if (!buf) 2373 return; 2374 2375 if (debug) 2376 log(LOG_DEBUG, "%s: lcp rej opts:", 2377 ifp->if_xname); 2378 2379 p = (void *)(h + 1); 2380 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2381 if (debug) 2382 addlog(" %s", sppp_lcp_opt_name(*p)); 2383 switch (*p) { 2384 case LCP_OPT_MAGIC: 2385 /* Magic number -- can't use it, use 0 */ 2386 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 2387 sp->lcp.magic = 0; 2388 break; 2389 case LCP_OPT_MRU: 2390 /* 2391 * Should not be rejected anyway, since we only 2392 * negotiate a MRU if explicitly requested by 2393 * peer. 2394 */ 2395 sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 2396 break; 2397 case LCP_OPT_AUTH_PROTO: 2398 /* 2399 * Peer doesn't want to authenticate himself, 2400 * deny unless this is a dialout call, and 2401 * SPPP_AUTHFLAG_NOCALLOUT is set. 2402 */ 2403 if ((sp->pp_flags & PP_CALLIN) == 0 && 2404 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) { 2405 if (debug) 2406 addlog(" [don't insist on auth " 2407 "for callout]"); 2408 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 2409 break; 2410 } 2411 if (debug) 2412 addlog("[access denied]\n"); 2413 lcp.Close(sp); 2414 break; 2415 } 2416 } 2417 if (debug) 2418 addlog("\n"); 2419 free(buf, M_TEMP); 2420 return; 2421 } 2422 2423 /* 2424 * Analyze the LCP Configure-NAK option list, and adjust our 2425 * negotiation. 2426 */ 2427 static void 2428 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 2429 { 2430 STDDCL; 2431 u_char *buf, *p; 2432 u_int32_t magic; 2433 2434 len -= 4; 2435 buf = malloc (len, M_TEMP, M_NOWAIT); 2436 if (!buf) 2437 return; 2438 2439 if (debug) 2440 log(LOG_DEBUG, "%s: lcp nak opts:", 2441 ifp->if_xname); 2442 2443 p = (void *)(h + 1); 2444 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 2445 if (debug) 2446 addlog(" %s", sppp_lcp_opt_name(*p)); 2447 switch (*p) { 2448 case LCP_OPT_MAGIC: 2449 /* Magic number -- renegotiate */ 2450 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 2451 len >= 6 && p[1] == 6) { 2452 magic = (u_int32_t)p[2] << 24 | 2453 (u_int32_t)p[3] << 16 | p[4] << 8 | p[5]; 2454 /* 2455 * If the remote magic is our negated one, 2456 * this looks like a loopback problem. 2457 * Suggest a new magic to make sure. 2458 */ 2459 if (magic == ~sp->lcp.magic) { 2460 if (debug) 2461 addlog(" magic glitch"); 2462 sp->lcp.magic = random(); 2463 } else { 2464 sp->lcp.magic = magic; 2465 if (debug) 2466 addlog(" %d", magic); 2467 } 2468 } 2469 break; 2470 case LCP_OPT_MRU: 2471 /* 2472 * Peer wants to advise us to negotiate an MRU. 2473 * Agree on it if it's reasonable, or use 2474 * default otherwise. 2475 */ 2476 if (len >= 4 && p[1] == 4) { 2477 u_int mru = p[2] * 256 + p[3]; 2478 if (debug) 2479 addlog(" %d", mru); 2480 if (mru < PP_MTU || mru > PP_MAX_MRU) 2481 mru = PP_MTU; 2482 sp->lcp.mru = mru; 2483 sp->lcp.opts |= (1 << LCP_OPT_MRU); 2484 } 2485 break; 2486 case LCP_OPT_AUTH_PROTO: 2487 /* 2488 * Peer doesn't like our authentication method, 2489 * deny. 2490 */ 2491 if (debug) 2492 addlog("[access denied]\n"); 2493 lcp.Close(sp); 2494 break; 2495 } 2496 } 2497 if (debug) 2498 addlog("\n"); 2499 free(buf, M_TEMP); 2500 return; 2501 } 2502 2503 static void 2504 sppp_lcp_tlu(struct sppp *sp) 2505 { 2506 STDDCL; 2507 int i; 2508 u_int32_t mask; 2509 2510 /* XXX ? */ 2511 if (! (ifp->if_flags & IFF_UP) && 2512 (ifp->if_flags & IFF_RUNNING)) { 2513 /* Coming out of loopback mode. */ 2514 if_up(ifp); 2515 } 2516 2517 for (i = 0; i < IDX_COUNT; i++) 2518 if ((cps[i])->flags & CP_QUAL) 2519 (cps[i])->Open(sp); 2520 2521 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 2522 (sp->pp_flags & PP_NEEDAUTH) != 0) 2523 sp->pp_phase = SPPP_PHASE_AUTHENTICATE; 2524 else 2525 sp->pp_phase = SPPP_PHASE_NETWORK; 2526 2527 if(debug) 2528 { 2529 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 2530 sppp_phase_name(sp->pp_phase)); 2531 } 2532 2533 /* 2534 * Open all authentication protocols. This is even required 2535 * if we already proceeded to network phase, since it might be 2536 * that remote wants us to authenticate, so we might have to 2537 * send a PAP request. Undesired authentication protocols 2538 * don't do anything when they get an Open event. 2539 */ 2540 for (i = 0; i < IDX_COUNT; i++) 2541 if ((cps[i])->flags & CP_AUTH) 2542 (cps[i])->Open(sp); 2543 2544 if (sp->pp_phase == SPPP_PHASE_NETWORK) { 2545 /* Notify all NCPs. */ 2546 for (i = 0; i < IDX_COUNT; i++) 2547 if ((cps[i])->flags & CP_NCP) 2548 (cps[i])->Open(sp); 2549 } 2550 2551 /* Send Up events to all started protos. */ 2552 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2553 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) 2554 (cps[i])->Up(sp); 2555 2556 /* notify low-level driver of state change */ 2557 if (sp->pp_chg) 2558 sp->pp_chg(sp, (int)sp->pp_phase); 2559 2560 if (sp->pp_phase == SPPP_PHASE_NETWORK) 2561 /* if no NCP is starting, close down */ 2562 sppp_lcp_check_and_close(sp); 2563 } 2564 2565 static void 2566 sppp_lcp_tld(struct sppp *sp) 2567 { 2568 STDDCL; 2569 int i; 2570 u_int32_t mask; 2571 2572 sp->pp_phase = SPPP_PHASE_TERMINATE; 2573 2574 if(debug) 2575 { 2576 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 2577 sppp_phase_name(sp->pp_phase)); 2578 } 2579 2580 /* 2581 * Take upper layers down. We send the Down event first and 2582 * the Close second to prevent the upper layers from sending 2583 * ``a flurry of terminate-request packets'', as the RFC 2584 * describes it. 2585 */ 2586 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2587 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) { 2588 (cps[i])->Down(sp); 2589 (cps[i])->Close(sp); 2590 } 2591 } 2592 2593 static void 2594 sppp_lcp_tls(struct sppp *sp) 2595 { 2596 STDDCL; 2597 2598 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) { 2599 printf("%s: authentication failed %d times, not retrying again\n", 2600 sp->pp_if.if_xname, sp->pp_auth_failures); 2601 if_down(&sp->pp_if); 2602 return; 2603 } 2604 2605 sp->pp_phase = SPPP_PHASE_ESTABLISH; 2606 2607 if(debug) 2608 { 2609 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 2610 sppp_phase_name(sp->pp_phase)); 2611 } 2612 2613 /* Notify lower layer if desired. */ 2614 if (sp->pp_tls) 2615 (sp->pp_tls)(sp); 2616 } 2617 2618 static void 2619 sppp_lcp_tlf(struct sppp *sp) 2620 { 2621 STDDCL; 2622 2623 sp->pp_phase = SPPP_PHASE_DEAD; 2624 2625 if(debug) 2626 { 2627 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 2628 sppp_phase_name(sp->pp_phase)); 2629 } 2630 2631 /* Notify lower layer if desired. */ 2632 if (sp->pp_tlf) 2633 (sp->pp_tlf)(sp); 2634 } 2635 2636 static void 2637 sppp_lcp_scr(struct sppp *sp) 2638 { 2639 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 2640 int i = 0; 2641 u_short authproto; 2642 2643 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 2644 if (! sp->lcp.magic) 2645 sp->lcp.magic = random(); 2646 opt[i++] = LCP_OPT_MAGIC; 2647 opt[i++] = 6; 2648 opt[i++] = sp->lcp.magic >> 24; 2649 opt[i++] = sp->lcp.magic >> 16; 2650 opt[i++] = sp->lcp.magic >> 8; 2651 opt[i++] = sp->lcp.magic; 2652 } 2653 2654 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 2655 opt[i++] = LCP_OPT_MRU; 2656 opt[i++] = 4; 2657 opt[i++] = sp->lcp.mru >> 8; 2658 opt[i++] = sp->lcp.mru; 2659 } 2660 2661 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 2662 authproto = sp->hisauth.proto; 2663 opt[i++] = LCP_OPT_AUTH_PROTO; 2664 opt[i++] = authproto == PPP_CHAP? 5: 4; 2665 opt[i++] = authproto >> 8; 2666 opt[i++] = authproto; 2667 if (authproto == PPP_CHAP) 2668 opt[i++] = CHAP_MD5; 2669 } 2670 2671 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 2672 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 2673 } 2674 2675 /* 2676 * Check the open NCPs, return true if at least one NCP is open. 2677 */ 2678 static int 2679 sppp_ncp_check(struct sppp *sp) 2680 { 2681 int i, mask; 2682 2683 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 2684 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP) 2685 return 1; 2686 return 0; 2687 } 2688 2689 /* 2690 * Re-check the open NCPs and see if we should terminate the link. 2691 * Called by the NCPs during their tlf action handling. 2692 */ 2693 static void 2694 sppp_lcp_check_and_close(struct sppp *sp) 2695 { 2696 2697 if (sp->pp_phase < SPPP_PHASE_NETWORK) 2698 /* don't bother, we are already going down */ 2699 return; 2700 2701 if (sppp_ncp_check(sp)) 2702 return; 2703 2704 lcp.Close(sp); 2705 } 2706 2707 2708 /* 2709 *--------------------------------------------------------------------------* 2710 * * 2711 * The IPCP implementation. * 2712 * * 2713 *--------------------------------------------------------------------------* 2714 */ 2715 2716 static void 2717 sppp_ipcp_init(struct sppp *sp) 2718 { 2719 sp->ipcp.opts = 0; 2720 sp->ipcp.flags = 0; 2721 sp->state[IDX_IPCP] = STATE_INITIAL; 2722 sp->fail_counter[IDX_IPCP] = 0; 2723 sp->pp_seq[IDX_IPCP] = 0; 2724 sp->pp_rseq[IDX_IPCP] = 0; 2725 callout_init(&sp->ch[IDX_IPCP]); 2726 } 2727 2728 static void 2729 sppp_ipcp_up(struct sppp *sp) 2730 { 2731 sppp_up_event(&ipcp, sp); 2732 } 2733 2734 static void 2735 sppp_ipcp_down(struct sppp *sp) 2736 { 2737 sppp_down_event(&ipcp, sp); 2738 } 2739 2740 static void 2741 sppp_ipcp_open(struct sppp *sp) 2742 { 2743 STDDCL; 2744 u_int32_t myaddr, hisaddr; 2745 2746 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN); 2747 sp->ipcp.req_myaddr = 0; 2748 sp->ipcp.req_hisaddr = 0; 2749 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs); 2750 2751 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 2752 /* 2753 * If we don't have his address, this probably means our 2754 * interface doesn't want to talk IP at all. (This could 2755 * be the case if somebody wants to speak only IPX, for 2756 * example.) Don't open IPCP in this case. 2757 */ 2758 if (hisaddr == 0L) { 2759 /* XXX this message should go away */ 2760 if (debug) 2761 log(LOG_DEBUG, "%s: ipcp_open(): no IP interface\n", 2762 ifp->if_xname); 2763 return; 2764 } 2765 2766 if (myaddr == 0) { 2767 /* 2768 * I don't have an assigned address, so i need to 2769 * negotiate my address. 2770 */ 2771 sp->ipcp.flags |= IPCP_MYADDR_DYN; 2772 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 2773 } 2774 if (hisaddr == 1) { 2775 /* 2776 * XXX - remove this hack! 2777 * remote has no valid adress, we need to get one assigned. 2778 */ 2779 sp->ipcp.flags |= IPCP_HISADDR_DYN; 2780 } 2781 sppp_open_event(&ipcp, sp); 2782 } 2783 2784 static void 2785 sppp_ipcp_close(struct sppp *sp) 2786 { 2787 STDDCL; 2788 2789 sppp_close_event(&ipcp, sp); 2790 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN)) 2791 /* 2792 * Some address was dynamic, clear it again. 2793 */ 2794 sppp_clear_ip_addrs(sp); 2795 2796 if (sp->pp_saved_mtu > 0) { 2797 ifp->if_mtu = sp->pp_saved_mtu; 2798 sp->pp_saved_mtu = 0; 2799 if (debug) 2800 log(LOG_DEBUG, 2801 "%s: resetting MTU to %" PRIu64 " bytes\n", 2802 ifp->if_xname, ifp->if_mtu); 2803 } 2804 } 2805 2806 static void 2807 sppp_ipcp_TO(void *cookie) 2808 { 2809 sppp_to_event(&ipcp, (struct sppp *)cookie); 2810 } 2811 2812 /* 2813 * Analyze a configure request. Return true if it was agreeable, and 2814 * caused action sca, false if it has been rejected or nak'ed, and 2815 * caused action scn. (The return value is used to make the state 2816 * transition decision in the state automaton.) 2817 */ 2818 static int 2819 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 2820 { 2821 u_char *buf, *r, *p; 2822 struct ifnet *ifp = &sp->pp_if; 2823 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 2824 u_int32_t hisaddr, desiredaddr; 2825 2826 len -= 4; 2827 origlen = len; 2828 /* 2829 * Make sure to allocate a buf that can at least hold a 2830 * conf-nak with an `address' option. We might need it below. 2831 */ 2832 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 2833 if (! buf) 2834 return (0); 2835 2836 /* pass 1: see if we can recognize them */ 2837 if (debug) 2838 log(LOG_DEBUG, "%s: ipcp parse opts:", 2839 ifp->if_xname); 2840 p = (void *)(h + 1); 2841 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2842 if (debug) 2843 addlog(" %s", sppp_ipcp_opt_name(*p)); 2844 switch (*p) { 2845 #ifdef notyet 2846 case IPCP_OPT_COMPRESSION: 2847 if (len >= 6 && p[1] >= 6) { 2848 /* correctly formed compress option */ 2849 continue; 2850 } 2851 if (debug) 2852 addlog(" [invalid]"); 2853 break; 2854 #endif 2855 case IPCP_OPT_ADDRESS: 2856 if (len >= 6 && p[1] == 6) { 2857 /* correctly formed address option */ 2858 continue; 2859 } 2860 if (debug) 2861 addlog(" [invalid]"); 2862 break; 2863 default: 2864 /* Others not supported. */ 2865 if (debug) 2866 addlog(" [rej]"); 2867 break; 2868 } 2869 /* Add the option to rejected list. */ 2870 bcopy (p, r, p[1]); 2871 r += p[1]; 2872 rlen += p[1]; 2873 } 2874 if (rlen) { 2875 if (debug) 2876 addlog(" send conf-rej\n"); 2877 sppp_cp_send(sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 2878 goto end; 2879 } else if (debug) 2880 addlog("\n"); 2881 2882 /* pass 2: parse option values */ 2883 if (sp->ipcp.flags & IPCP_HISADDR_SEEN) 2884 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */ 2885 else 2886 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */ 2887 if (debug) 2888 log(LOG_DEBUG, "%s: ipcp parse opt values: ", 2889 ifp->if_xname); 2890 p = (void *)(h + 1); 2891 len = origlen; 2892 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 2893 if (debug) 2894 addlog(" %s", sppp_ipcp_opt_name(*p)); 2895 switch (*p) { 2896 #ifdef notyet 2897 case IPCP_OPT_COMPRESSION: 2898 continue; 2899 #endif 2900 case IPCP_OPT_ADDRESS: 2901 desiredaddr = p[2] << 24 | p[3] << 16 | 2902 p[4] << 8 | p[5]; 2903 if (desiredaddr == hisaddr || 2904 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) { 2905 /* 2906 * Peer's address is same as our value, 2907 * this is agreeable. Gonna conf-ack 2908 * it. 2909 */ 2910 if (debug) 2911 addlog(" %s [ack]", 2912 sppp_dotted_quad(hisaddr)); 2913 /* record that we've seen it already */ 2914 sp->ipcp.flags |= IPCP_HISADDR_SEEN; 2915 sp->ipcp.req_hisaddr = desiredaddr; 2916 hisaddr = desiredaddr; 2917 continue; 2918 } 2919 /* 2920 * The address wasn't agreeable. This is either 2921 * he sent us 0.0.0.0, asking to assign him an 2922 * address, or he send us another address not 2923 * matching our value. Either case, we gonna 2924 * conf-nak it with our value. 2925 */ 2926 if (debug) { 2927 if (desiredaddr == 0) 2928 addlog(" [addr requested]"); 2929 else 2930 addlog(" %s [not agreed]", 2931 sppp_dotted_quad(desiredaddr)); 2932 } 2933 2934 p[2] = hisaddr >> 24; 2935 p[3] = hisaddr >> 16; 2936 p[4] = hisaddr >> 8; 2937 p[5] = hisaddr; 2938 break; 2939 } 2940 /* Add the option to nak'ed list. */ 2941 bcopy (p, r, p[1]); 2942 r += p[1]; 2943 rlen += p[1]; 2944 } 2945 2946 /* 2947 * If we are about to conf-ack the request, but haven't seen 2948 * his address so far, gonna conf-nak it instead, with the 2949 * `address' option present and our idea of his address being 2950 * filled in there, to request negotiation of both addresses. 2951 * 2952 * XXX This can result in an endless req - nak loop if peer 2953 * doesn't want to send us his address. Q: What should we do 2954 * about it? XXX A: implement the max-failure counter. 2955 */ 2956 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) { 2957 buf[0] = IPCP_OPT_ADDRESS; 2958 buf[1] = 6; 2959 buf[2] = hisaddr >> 24; 2960 buf[3] = hisaddr >> 16; 2961 buf[4] = hisaddr >> 8; 2962 buf[5] = hisaddr; 2963 rlen = 6; 2964 if (debug) 2965 addlog(" still need hisaddr"); 2966 } 2967 2968 if (rlen) { 2969 if (debug) 2970 addlog(" send conf-nak\n"); 2971 sppp_cp_send(sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 2972 } else { 2973 if (debug) 2974 addlog(" send conf-ack\n"); 2975 sppp_cp_send(sp, PPP_IPCP, CONF_ACK, h->ident, origlen, h + 1); 2976 } 2977 2978 end: 2979 free(buf, M_TEMP); 2980 return (rlen == 0); 2981 } 2982 2983 /* 2984 * Analyze the IPCP Configure-Reject option list, and adjust our 2985 * negotiation. 2986 */ 2987 static void 2988 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 2989 { 2990 u_char *buf, *p; 2991 struct ifnet *ifp = &sp->pp_if; 2992 int debug = ifp->if_flags & IFF_DEBUG; 2993 2994 len -= 4; 2995 buf = malloc (len, M_TEMP, M_NOWAIT); 2996 if (!buf) 2997 return; 2998 2999 if (debug) 3000 log(LOG_DEBUG, "%s: ipcp rej opts:", 3001 ifp->if_xname); 3002 3003 p = (void *)(h + 1); 3004 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3005 if (debug) 3006 addlog(" %s", sppp_ipcp_opt_name(*p)); 3007 switch (*p) { 3008 case IPCP_OPT_ADDRESS: 3009 /* 3010 * Peer doesn't grok address option. This is 3011 * bad. XXX Should we better give up here? 3012 */ 3013 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 3014 break; 3015 #ifdef notyet 3016 case IPCP_OPT_COMPRESS: 3017 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS); 3018 break; 3019 #endif 3020 } 3021 } 3022 if (debug) 3023 addlog("\n"); 3024 free(buf, M_TEMP); 3025 return; 3026 } 3027 3028 /* 3029 * Analyze the IPCP Configure-NAK option list, and adjust our 3030 * negotiation. 3031 */ 3032 static void 3033 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3034 { 3035 u_char *p; 3036 struct ifnet *ifp = &sp->pp_if; 3037 int debug = ifp->if_flags & IFF_DEBUG; 3038 u_int32_t wantaddr; 3039 3040 len -= 4; 3041 3042 if (debug) 3043 log(LOG_DEBUG, "%s: ipcp nak opts:", 3044 ifp->if_xname); 3045 3046 p = (void *)(h + 1); 3047 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3048 if (debug) 3049 addlog(" %s", sppp_ipcp_opt_name(*p)); 3050 switch (*p) { 3051 case IPCP_OPT_ADDRESS: 3052 /* 3053 * Peer doesn't like our local IP address. See 3054 * if we can do something for him. We'll drop 3055 * him our address then. 3056 */ 3057 if (len >= 6 && p[1] == 6) { 3058 wantaddr = p[2] << 24 | p[3] << 16 | 3059 p[4] << 8 | p[5]; 3060 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 3061 if (debug) 3062 addlog(" [wantaddr %s]", 3063 sppp_dotted_quad(wantaddr)); 3064 /* 3065 * When doing dynamic address assignment, 3066 * we accept his offer. Otherwise, we 3067 * ignore it and thus continue to negotiate 3068 * our already existing value. 3069 */ 3070 if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 3071 if (debug) 3072 addlog(" [agree]"); 3073 sp->ipcp.flags |= IPCP_MYADDR_SEEN; 3074 sp->ipcp.req_myaddr = wantaddr; 3075 } 3076 } 3077 break; 3078 3079 case IPCP_OPT_PRIMDNS: 3080 if (len >= 6 && p[1] == 6) { 3081 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 | 3082 p[4] << 8 | p[5]; 3083 } 3084 break; 3085 3086 case IPCP_OPT_SECDNS: 3087 if (len >= 6 && p[1] == 6) { 3088 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 | 3089 p[4] << 8 | p[5]; 3090 } 3091 break; 3092 #ifdef notyet 3093 case IPCP_OPT_COMPRESS: 3094 /* 3095 * Peer wants different compression parameters. 3096 */ 3097 break; 3098 #endif 3099 } 3100 } 3101 if (debug) 3102 addlog("\n"); 3103 return; 3104 } 3105 3106 static void 3107 sppp_ipcp_tlu(struct sppp *sp) 3108 { 3109 /* we are up. Set addresses and notify anyone interested */ 3110 STDDCL; 3111 u_int32_t myaddr, hisaddr; 3112 3113 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 3114 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN)) 3115 myaddr = sp->ipcp.req_myaddr; 3116 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN)) 3117 hisaddr = sp->ipcp.req_hisaddr; 3118 sppp_set_ip_addrs(sp, myaddr, hisaddr); 3119 3120 if (ifp->if_mtu > sp->lcp.their_mru) { 3121 sp->pp_saved_mtu = ifp->if_mtu; 3122 ifp->if_mtu = sp->lcp.their_mru; 3123 if (debug) 3124 log(LOG_DEBUG, 3125 "%s: setting MTU to %" PRIu64 " bytes\n", 3126 ifp->if_xname, ifp->if_mtu); 3127 } 3128 3129 if (sp->pp_con) 3130 sp->pp_con(sp); 3131 } 3132 3133 static void 3134 sppp_ipcp_tld(struct sppp *sp) 3135 { 3136 } 3137 3138 static void 3139 sppp_ipcp_tls(struct sppp *sp) 3140 { 3141 /* indicate to LCP that it must stay alive */ 3142 sp->lcp.protos |= (1 << IDX_IPCP); 3143 } 3144 3145 static void 3146 sppp_ipcp_tlf(struct sppp *sp) 3147 { 3148 /* we no longer need LCP */ 3149 sp->lcp.protos &= ~(1 << IDX_IPCP); 3150 } 3151 3152 static void 3153 sppp_ipcp_scr(struct sppp *sp) 3154 { 3155 char opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */]; 3156 u_int32_t ouraddr; 3157 int i = 0; 3158 3159 #ifdef notyet 3160 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 3161 opt[i++] = IPCP_OPT_COMPRESSION; 3162 opt[i++] = 6; 3163 opt[i++] = 0; /* VJ header compression */ 3164 opt[i++] = 0x2d; /* VJ header compression */ 3165 opt[i++] = max_slot_id; 3166 opt[i++] = comp_slot_id; 3167 } 3168 #endif 3169 3170 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 3171 if (sp->ipcp.flags & IPCP_MYADDR_SEEN) 3172 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */ 3173 else 3174 sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 3175 opt[i++] = IPCP_OPT_ADDRESS; 3176 opt[i++] = 6; 3177 opt[i++] = ouraddr >> 24; 3178 opt[i++] = ouraddr >> 16; 3179 opt[i++] = ouraddr >> 8; 3180 opt[i++] = ouraddr; 3181 } 3182 3183 if (sp->query_dns & 1) { 3184 opt[i++] = IPCP_OPT_PRIMDNS; 3185 opt[i++] = 6; 3186 opt[i++] = sp->dns_addrs[0] >> 24; 3187 opt[i++] = sp->dns_addrs[0] >> 16; 3188 opt[i++] = sp->dns_addrs[0] >> 8; 3189 opt[i++] = sp->dns_addrs[0]; 3190 } 3191 if (sp->query_dns & 2) { 3192 opt[i++] = IPCP_OPT_SECDNS; 3193 opt[i++] = 6; 3194 opt[i++] = sp->dns_addrs[1] >> 24; 3195 opt[i++] = sp->dns_addrs[1] >> 16; 3196 opt[i++] = sp->dns_addrs[1] >> 8; 3197 opt[i++] = sp->dns_addrs[1]; 3198 } 3199 3200 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 3201 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 3202 } 3203 3204 3205 /* 3206 *--------------------------------------------------------------------------* 3207 * * 3208 * The IPv6CP implementation. * 3209 * * 3210 *--------------------------------------------------------------------------* 3211 */ 3212 3213 #ifdef INET6 3214 static void 3215 sppp_ipv6cp_init(struct sppp *sp) 3216 { 3217 sp->ipv6cp.opts = 0; 3218 sp->ipv6cp.flags = 0; 3219 sp->state[IDX_IPV6CP] = STATE_INITIAL; 3220 sp->fail_counter[IDX_IPV6CP] = 0; 3221 sp->pp_seq[IDX_IPV6CP] = 0; 3222 sp->pp_rseq[IDX_IPV6CP] = 0; 3223 callout_init(&sp->ch[IDX_IPV6CP]); 3224 } 3225 3226 static void 3227 sppp_ipv6cp_up(struct sppp *sp) 3228 { 3229 sppp_up_event(&ipv6cp, sp); 3230 } 3231 3232 static void 3233 sppp_ipv6cp_down(struct sppp *sp) 3234 { 3235 sppp_down_event(&ipv6cp, sp); 3236 } 3237 3238 static void 3239 sppp_ipv6cp_open(struct sppp *sp) 3240 { 3241 STDDCL; 3242 struct in6_addr myaddr, hisaddr; 3243 3244 #ifdef IPV6CP_MYIFID_DYN 3245 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 3246 #else 3247 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 3248 #endif 3249 3250 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 3251 /* 3252 * If we don't have our address, this probably means our 3253 * interface doesn't want to talk IPv6 at all. (This could 3254 * be the case if somebody wants to speak only IPX, for 3255 * example.) Don't open IPv6CP in this case. 3256 */ 3257 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 3258 /* XXX this message should go away */ 3259 if (debug) 3260 log(LOG_DEBUG, "%s: ipv6cp_open(): no IPv6 interface\n", 3261 ifp->if_xname); 3262 return; 3263 } 3264 3265 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3266 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3267 sppp_open_event(&ipv6cp, sp); 3268 } 3269 3270 static void 3271 sppp_ipv6cp_close(struct sppp *sp) 3272 { 3273 sppp_close_event(&ipv6cp, sp); 3274 } 3275 3276 static void 3277 sppp_ipv6cp_TO(void *cookie) 3278 { 3279 sppp_to_event(&ipv6cp, (struct sppp *)cookie); 3280 } 3281 3282 /* 3283 * Analyze a configure request. Return true if it was agreeable, and 3284 * caused action sca, false if it has been rejected or nak'ed, and 3285 * caused action scn. (The return value is used to make the state 3286 * transition decision in the state automaton.) 3287 */ 3288 static int 3289 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3290 { 3291 u_char *buf, *r, *p; 3292 struct ifnet *ifp = &sp->pp_if; 3293 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 3294 struct in6_addr myaddr, desiredaddr, suggestaddr; 3295 int ifidcount; 3296 int type; 3297 int collision, nohisaddr; 3298 3299 len -= 4; 3300 origlen = len; 3301 /* 3302 * Make sure to allocate a buf that can at least hold a 3303 * conf-nak with an `address' option. We might need it below. 3304 */ 3305 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 3306 if (! buf) 3307 return (0); 3308 3309 /* pass 1: see if we can recognize them */ 3310 if (debug) 3311 log(LOG_DEBUG, "%s: ipv6cp parse opts:", 3312 ifp->if_xname); 3313 p = (void *)(h + 1); 3314 ifidcount = 0; 3315 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3316 if (debug) 3317 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3318 switch (*p) { 3319 case IPV6CP_OPT_IFID: 3320 if (len >= 10 && p[1] == 10 && ifidcount == 0) { 3321 /* correctly formed address option */ 3322 ifidcount++; 3323 continue; 3324 } 3325 if (debug) 3326 addlog(" [invalid]"); 3327 break; 3328 #ifdef notyet 3329 case IPV6CP_OPT_COMPRESSION: 3330 if (len >= 4 && p[1] >= 4) { 3331 /* correctly formed compress option */ 3332 continue; 3333 } 3334 if (debug) 3335 addlog(" [invalid]"); 3336 break; 3337 #endif 3338 default: 3339 /* Others not supported. */ 3340 if (debug) 3341 addlog(" [rej]"); 3342 break; 3343 } 3344 /* Add the option to rejected list. */ 3345 bcopy (p, r, p[1]); 3346 r += p[1]; 3347 rlen += p[1]; 3348 } 3349 if (rlen) { 3350 if (debug) 3351 addlog(" send conf-rej\n"); 3352 sppp_cp_send(sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 3353 goto end; 3354 } else if (debug) 3355 addlog("\n"); 3356 3357 /* pass 2: parse option values */ 3358 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 3359 if (debug) 3360 log(LOG_DEBUG, "%s: ipv6cp parse opt values: ", 3361 ifp->if_xname); 3362 p = (void *)(h + 1); 3363 len = origlen; 3364 type = CONF_ACK; 3365 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 3366 if (debug) 3367 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3368 switch (*p) { 3369 #ifdef notyet 3370 case IPV6CP_OPT_COMPRESSION: 3371 continue; 3372 #endif 3373 case IPV6CP_OPT_IFID: 3374 memset(&desiredaddr, 0, sizeof(desiredaddr)); 3375 bcopy(&p[2], &desiredaddr.s6_addr[8], 8); 3376 collision = (memcmp(&desiredaddr.s6_addr[8], 3377 &myaddr.s6_addr[8], 8) == 0); 3378 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 3379 3380 desiredaddr.s6_addr16[0] = htons(0xfe80); 3381 desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3382 3383 if (!collision && !nohisaddr) { 3384 /* no collision, hisaddr known - Conf-Ack */ 3385 type = CONF_ACK; 3386 3387 if (debug) { 3388 addlog(" %s [%s]", 3389 ip6_sprintf(&desiredaddr), 3390 sppp_cp_type_name(type)); 3391 } 3392 continue; 3393 } 3394 3395 memset(&suggestaddr, 0, sizeof(&suggestaddr)); 3396 if (collision && nohisaddr) { 3397 /* collision, hisaddr unknown - Conf-Rej */ 3398 type = CONF_REJ; 3399 memset(&p[2], 0, 8); 3400 } else { 3401 /* 3402 * - no collision, hisaddr unknown, or 3403 * - collision, hisaddr known 3404 * Conf-Nak, suggest hisaddr 3405 */ 3406 type = CONF_NAK; 3407 sppp_suggest_ip6_addr(sp, &suggestaddr); 3408 bcopy(&suggestaddr.s6_addr[8], &p[2], 8); 3409 } 3410 if (debug) 3411 addlog(" %s [%s]", ip6_sprintf(&desiredaddr), 3412 sppp_cp_type_name(type)); 3413 break; 3414 } 3415 /* Add the option to nak'ed list. */ 3416 bcopy (p, r, p[1]); 3417 r += p[1]; 3418 rlen += p[1]; 3419 } 3420 3421 if (rlen == 0 && type == CONF_ACK) { 3422 if (debug) 3423 addlog(" send %s\n", sppp_cp_type_name(type)); 3424 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, origlen, h + 1); 3425 } else { 3426 #ifdef notdef 3427 if (type == CONF_ACK) 3428 panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 3429 #endif 3430 3431 if (debug) { 3432 addlog(" send %s suggest %s\n", 3433 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr)); 3434 } 3435 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, rlen, buf); 3436 } 3437 3438 end: 3439 free(buf, M_TEMP); 3440 return (rlen == 0); 3441 } 3442 3443 /* 3444 * Analyze the IPv6CP Configure-Reject option list, and adjust our 3445 * negotiation. 3446 */ 3447 static void 3448 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3449 { 3450 u_char *buf, *p; 3451 struct ifnet *ifp = &sp->pp_if; 3452 int debug = ifp->if_flags & IFF_DEBUG; 3453 3454 len -= 4; 3455 buf = malloc (len, M_TEMP, M_NOWAIT); 3456 if (!buf) 3457 return; 3458 3459 if (debug) 3460 log(LOG_DEBUG, "%s: ipv6cp rej opts:", 3461 ifp->if_xname); 3462 3463 p = (void *)(h + 1); 3464 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3465 if (debug) 3466 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3467 switch (*p) { 3468 case IPV6CP_OPT_IFID: 3469 /* 3470 * Peer doesn't grok address option. This is 3471 * bad. XXX Should we better give up here? 3472 */ 3473 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 3474 break; 3475 #ifdef notyet 3476 case IPV6CP_OPT_COMPRESS: 3477 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 3478 break; 3479 #endif 3480 } 3481 } 3482 if (debug) 3483 addlog("\n"); 3484 free(buf, M_TEMP); 3485 return; 3486 } 3487 3488 /* 3489 * Analyze the IPv6CP Configure-NAK option list, and adjust our 3490 * negotiation. 3491 */ 3492 static void 3493 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3494 { 3495 u_char *buf, *p; 3496 struct ifnet *ifp = &sp->pp_if; 3497 int debug = ifp->if_flags & IFF_DEBUG; 3498 struct in6_addr suggestaddr; 3499 3500 len -= 4; 3501 buf = malloc (len, M_TEMP, M_NOWAIT); 3502 if (!buf) 3503 return; 3504 3505 if (debug) 3506 log(LOG_DEBUG, "%s: ipv6cp nak opts:", 3507 ifp->if_xname); 3508 3509 p = (void *)(h + 1); 3510 for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 3511 if (debug) 3512 addlog(" %s", sppp_ipv6cp_opt_name(*p)); 3513 switch (*p) { 3514 case IPV6CP_OPT_IFID: 3515 /* 3516 * Peer doesn't like our local ifid. See 3517 * if we can do something for him. We'll drop 3518 * him our address then. 3519 */ 3520 if (len < 10 || p[1] != 10) 3521 break; 3522 memset(&suggestaddr, 0, sizeof(suggestaddr)); 3523 suggestaddr.s6_addr16[0] = htons(0xfe80); 3524 suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 3525 bcopy(&p[2], &suggestaddr.s6_addr[8], 8); 3526 3527 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 3528 if (debug) 3529 addlog(" [suggestaddr %s]", 3530 ip6_sprintf(&suggestaddr)); 3531 #ifdef IPV6CP_MYIFID_DYN 3532 /* 3533 * When doing dynamic address assignment, 3534 * we accept his offer. 3535 */ 3536 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 3537 struct in6_addr lastsuggest; 3538 /* 3539 * If <suggested myaddr from peer> equals to 3540 * <hisaddr we have suggested last time>, 3541 * we have a collision. generate new random 3542 * ifid. 3543 */ 3544 sppp_suggest_ip6_addr(&lastsuggest); 3545 if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 3546 lastsuggest)) { 3547 if (debug) 3548 addlog(" [random]"); 3549 sppp_gen_ip6_addr(sp, &suggestaddr); 3550 } 3551 sppp_set_ip6_addr(sp, &suggestaddr, 0); 3552 if (debug) 3553 addlog(" [agree]"); 3554 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 3555 } 3556 #else 3557 /* 3558 * Since we do not do dynamic address assignment, 3559 * we ignore it and thus continue to negotiate 3560 * our already existing value. This can possibly 3561 * go into infinite request-reject loop. 3562 * 3563 * This is not likely because we normally use 3564 * ifid based on MAC-address. 3565 * If you have no ethernet card on the node, too bad. 3566 * XXX should we use fail_counter? 3567 */ 3568 #endif 3569 break; 3570 #ifdef notyet 3571 case IPV6CP_OPT_COMPRESS: 3572 /* 3573 * Peer wants different compression parameters. 3574 */ 3575 break; 3576 #endif 3577 } 3578 } 3579 if (debug) 3580 addlog("\n"); 3581 free(buf, M_TEMP); 3582 return; 3583 } 3584 3585 static void 3586 sppp_ipv6cp_tlu(struct sppp *sp) 3587 { 3588 /* we are up - notify isdn daemon */ 3589 if (sp->pp_con) 3590 sp->pp_con(sp); 3591 } 3592 3593 static void 3594 sppp_ipv6cp_tld(struct sppp *sp) 3595 { 3596 } 3597 3598 static void 3599 sppp_ipv6cp_tls(struct sppp *sp) 3600 { 3601 /* indicate to LCP that it must stay alive */ 3602 sp->lcp.protos |= (1 << IDX_IPV6CP); 3603 } 3604 3605 static void 3606 sppp_ipv6cp_tlf(struct sppp *sp) 3607 { 3608 /* we no longer need LCP */ 3609 sp->lcp.protos &= ~(1 << IDX_IPV6CP); 3610 } 3611 3612 static void 3613 sppp_ipv6cp_scr(struct sppp *sp) 3614 { 3615 char opt[10 /* ifid */ + 4 /* compression, minimum */]; 3616 struct in6_addr ouraddr; 3617 int i = 0; 3618 3619 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 3620 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 3621 opt[i++] = IPV6CP_OPT_IFID; 3622 opt[i++] = 10; 3623 bcopy(&ouraddr.s6_addr[8], &opt[i], 8); 3624 i += 8; 3625 } 3626 3627 #ifdef notyet 3628 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 3629 opt[i++] = IPV6CP_OPT_COMPRESSION; 3630 opt[i++] = 4; 3631 opt[i++] = 0; /* TBD */ 3632 opt[i++] = 0; /* TBD */ 3633 /* variable length data may follow */ 3634 } 3635 #endif 3636 3637 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 3638 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 3639 } 3640 #else /*INET6*/ 3641 static void sppp_ipv6cp_init(struct sppp *sp) 3642 { 3643 } 3644 3645 static void sppp_ipv6cp_up(struct sppp *sp) 3646 { 3647 } 3648 3649 static void sppp_ipv6cp_down(struct sppp *sp) 3650 { 3651 } 3652 3653 3654 static void sppp_ipv6cp_open(struct sppp *sp) 3655 { 3656 } 3657 3658 static void sppp_ipv6cp_close(struct sppp *sp) 3659 { 3660 } 3661 3662 static void sppp_ipv6cp_TO(void *sp) 3663 { 3664 } 3665 3666 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 3667 { 3668 return 0; 3669 } 3670 3671 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 3672 { 3673 } 3674 3675 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 3676 { 3677 } 3678 3679 static void sppp_ipv6cp_tlu(struct sppp *sp) 3680 { 3681 } 3682 3683 static void sppp_ipv6cp_tld(struct sppp *sp) 3684 { 3685 } 3686 3687 static void sppp_ipv6cp_tls(struct sppp *sp) 3688 { 3689 } 3690 3691 static void sppp_ipv6cp_tlf(struct sppp *sp) 3692 { 3693 } 3694 3695 static void sppp_ipv6cp_scr(struct sppp *sp) 3696 { 3697 } 3698 #endif /*INET6*/ 3699 3700 3701 /* 3702 *--------------------------------------------------------------------------* 3703 * * 3704 * The CHAP implementation. * 3705 * * 3706 *--------------------------------------------------------------------------* 3707 */ 3708 3709 /* 3710 * The authentication protocols don't employ a full-fledged state machine as 3711 * the control protocols do, since they do have Open and Close events, but 3712 * not Up and Down, nor are they explicitly terminated. Also, use of the 3713 * authentication protocols may be different in both directions (this makes 3714 * sense, think of a machine that never accepts incoming calls but only 3715 * calls out, it doesn't require the called party to authenticate itself). 3716 * 3717 * Our state machine for the local authentication protocol (we are requesting 3718 * the peer to authenticate) looks like: 3719 * 3720 * RCA- 3721 * +--------------------------------------------+ 3722 * V scn,tld| 3723 * +--------+ Close +---------+ RCA+ 3724 * | |<----------------------------------| |------+ 3725 * +--->| Closed | TO* | Opened | sca | 3726 * | | |-----+ +-------| |<-----+ 3727 * | +--------+ irc | | +---------+ 3728 * | ^ | | ^ 3729 * | | | | | 3730 * | | | | | 3731 * | TO-| | | | 3732 * | |tld TO+ V | | 3733 * | | +------->+ | | 3734 * | | | | | | 3735 * | +--------+ V | | 3736 * | | |<----+<--------------------+ | 3737 * | | Req- | scr | 3738 * | | Sent | | 3739 * | | | | 3740 * | +--------+ | 3741 * | RCA- | | RCA+ | 3742 * +------+ +------------------------------------------+ 3743 * scn,tld sca,irc,ict,tlu 3744 * 3745 * 3746 * with: 3747 * 3748 * Open: LCP reached authentication phase 3749 * Close: LCP reached terminate phase 3750 * 3751 * RCA+: received reply (pap-req, chap-response), acceptable 3752 * RCN: received reply (pap-req, chap-response), not acceptable 3753 * TO+: timeout with restart counter >= 0 3754 * TO-: timeout with restart counter < 0 3755 * TO*: reschedule timeout for CHAP 3756 * 3757 * scr: send request packet (none for PAP, chap-challenge) 3758 * sca: send ack packet (pap-ack, chap-success) 3759 * scn: send nak packet (pap-nak, chap-failure) 3760 * ict: initialize re-challenge timer (CHAP only) 3761 * 3762 * tlu: this-layer-up, LCP reaches network phase 3763 * tld: this-layer-down, LCP enters terminate phase 3764 * 3765 * Note that in CHAP mode, after sending a new challenge, while the state 3766 * automaton falls back into Req-Sent state, it doesn't signal a tld 3767 * event to LCP, so LCP remains in network phase. Only after not getting 3768 * any response (or after getting an unacceptable response), CHAP closes, 3769 * causing LCP to enter terminate phase. 3770 * 3771 * With PAP, there is no initial request that can be sent. The peer is 3772 * expected to send one based on the successful negotiation of PAP as 3773 * the authentication protocol during the LCP option negotiation. 3774 * 3775 * Incoming authentication protocol requests (remote requests 3776 * authentication, we are peer) don't employ a state machine at all, 3777 * they are simply answered. Some peers [Ascend P50 firmware rev 3778 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are 3779 * still in authentication phase (thereby violating the standard that 3780 * demands that these NCP packets are to be discarded), so we keep 3781 * track of the peer demanding us to authenticate, and only proceed to 3782 * phase network once we've seen a positive acknowledge for the 3783 * authentication. 3784 */ 3785 3786 /* 3787 * Handle incoming CHAP packets. 3788 */ 3789 void 3790 sppp_chap_input(struct sppp *sp, struct mbuf *m) 3791 { 3792 STDDCL; 3793 struct lcp_header *h; 3794 int len, x; 3795 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize; 3796 int value_len, name_len; 3797 MD5_CTX ctx; 3798 3799 len = m->m_pkthdr.len; 3800 if (len < 4) { 3801 if (debug) 3802 log(LOG_DEBUG, 3803 "%s: chap invalid packet length: %d bytes\n", 3804 ifp->if_xname, len); 3805 return; 3806 } 3807 h = mtod(m, struct lcp_header *); 3808 if (len > ntohs(h->len)) 3809 len = ntohs(h->len); 3810 3811 switch (h->type) { 3812 /* challenge, failure and success are his authproto */ 3813 case CHAP_CHALLENGE: 3814 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 3815 /* can't do anything usefull */ 3816 sp->pp_auth_failures++; 3817 printf("%s: chap input without my name and my secret being set\n", 3818 ifp->if_xname); 3819 break; 3820 } 3821 value = 1 + (u_char *)(h + 1); 3822 value_len = value[-1]; 3823 name = value + value_len; 3824 name_len = len - value_len - 5; 3825 if (name_len < 0) { 3826 if (debug) { 3827 log(LOG_DEBUG, 3828 "%s: chap corrupted challenge " 3829 "<%s id=0x%x len=%d", 3830 ifp->if_xname, 3831 sppp_auth_type_name(PPP_CHAP, h->type), 3832 h->ident, ntohs(h->len)); 3833 if (len > 4) 3834 sppp_print_bytes((u_char *)(h + 1), 3835 len - 4); 3836 addlog(">\n"); 3837 } 3838 break; 3839 } 3840 3841 if (debug) { 3842 log(LOG_DEBUG, 3843 "%s: chap input <%s id=0x%x len=%d name=", 3844 ifp->if_xname, 3845 sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 3846 ntohs(h->len)); 3847 sppp_print_string((char *) name, name_len); 3848 addlog(" value-size=%d value=", value_len); 3849 sppp_print_bytes(value, value_len); 3850 addlog(">\n"); 3851 } 3852 3853 /* Compute reply value. */ 3854 MD5Init(&ctx); 3855 MD5Update(&ctx, &h->ident, 1); 3856 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len); 3857 MD5Update(&ctx, value, value_len); 3858 MD5Final(digest, &ctx); 3859 dsize = sizeof digest; 3860 3861 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 3862 sizeof dsize, (const char *)&dsize, 3863 sizeof digest, digest, 3864 sp->myauth.name_len, 3865 sp->myauth.name, 3866 0); 3867 break; 3868 3869 case CHAP_SUCCESS: 3870 if (debug) { 3871 log(LOG_DEBUG, "%s: chap success", 3872 ifp->if_xname); 3873 if (len > 4) { 3874 addlog(": "); 3875 sppp_print_string((char *)(h + 1), len - 4); 3876 } 3877 addlog("\n"); 3878 } 3879 x = splnet(); 3880 sp->pp_auth_failures = 0; 3881 sp->pp_flags &= ~PP_NEEDAUTH; 3882 if (sp->myauth.proto == PPP_CHAP && 3883 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 3884 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 3885 /* 3886 * We are authenticator for CHAP but didn't 3887 * complete yet. Leave it to tlu to proceed 3888 * to network phase. 3889 */ 3890 splx(x); 3891 break; 3892 } 3893 splx(x); 3894 sppp_phase_network(sp); 3895 break; 3896 3897 case CHAP_FAILURE: 3898 x = splnet(); 3899 sp->pp_auth_failures++; 3900 splx(x); 3901 if (debug) { 3902 log(LOG_INFO, "%s: chap failure", 3903 ifp->if_xname); 3904 if (len > 4) { 3905 addlog(": "); 3906 sppp_print_string((char *)(h + 1), len - 4); 3907 } 3908 addlog("\n"); 3909 } else 3910 log(LOG_INFO, "%s: chap failure\n", 3911 ifp->if_xname); 3912 /* await LCP shutdown by authenticator */ 3913 break; 3914 3915 /* response is my authproto */ 3916 case CHAP_RESPONSE: 3917 if (sp->hisauth.secret == NULL) { 3918 /* can't do anything usefull */ 3919 printf("%s: chap input without his secret being set\n", 3920 ifp->if_xname); 3921 break; 3922 } 3923 value = 1 + (u_char *)(h + 1); 3924 value_len = value[-1]; 3925 name = value + value_len; 3926 name_len = len - value_len - 5; 3927 if (name_len < 0) { 3928 if (debug) { 3929 log(LOG_DEBUG, 3930 "%s: chap corrupted response " 3931 "<%s id=0x%x len=%d", 3932 ifp->if_xname, 3933 sppp_auth_type_name(PPP_CHAP, h->type), 3934 h->ident, ntohs(h->len)); 3935 if (len > 4) 3936 sppp_print_bytes((u_char *)(h + 1), 3937 len - 4); 3938 addlog(">\n"); 3939 } 3940 break; 3941 } 3942 if (h->ident != sp->confid[IDX_CHAP]) { 3943 if (debug) 3944 log(LOG_DEBUG, 3945 "%s: chap dropping response for old ID " 3946 "(got %d, expected %d)\n", 3947 ifp->if_xname, 3948 h->ident, sp->confid[IDX_CHAP]); 3949 break; 3950 } 3951 if (sp->hisauth.name != NULL && 3952 (name_len != sp->hisauth.name_len 3953 || memcmp(name, sp->hisauth.name, name_len) != 0)) { 3954 log(LOG_INFO, "%s: chap response, his name ", 3955 ifp->if_xname); 3956 sppp_print_string(name, name_len); 3957 addlog(" != expected "); 3958 sppp_print_string(sp->hisauth.name, 3959 sp->hisauth.name_len); 3960 addlog("\n"); 3961 goto chap_failure; 3962 } 3963 if (debug) { 3964 log(LOG_DEBUG, "%s: chap input(%s) " 3965 "<%s id=0x%x len=%d name=", 3966 ifp->if_xname, 3967 sppp_state_name(sp->state[IDX_CHAP]), 3968 sppp_auth_type_name(PPP_CHAP, h->type), 3969 h->ident, ntohs(h->len)); 3970 sppp_print_string((char *)name, name_len); 3971 addlog(" value-size=%d value=", value_len); 3972 sppp_print_bytes(value, value_len); 3973 addlog(">\n"); 3974 } 3975 if (value_len != sizeof(sp->myauth.challenge)) { 3976 if (debug) 3977 log(LOG_DEBUG, 3978 "%s: chap bad hash value length: " 3979 "%d bytes, should be %ld\n", 3980 ifp->if_xname, value_len, 3981 (long) sizeof(sp->myauth.challenge)); 3982 goto chap_failure; 3983 } 3984 3985 MD5Init(&ctx); 3986 MD5Update(&ctx, &h->ident, 1); 3987 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len); 3988 MD5Update(&ctx, sp->myauth.challenge, sizeof(sp->myauth.challenge)); 3989 MD5Final(digest, &ctx); 3990 3991 #define FAILMSG "Failed..." 3992 #define SUCCMSG "Welcome!" 3993 3994 if (value_len != sizeof digest || 3995 memcmp(digest, value, value_len) != 0) { 3996 chap_failure: 3997 /* action scn, tld */ 3998 x = splnet(); 3999 sp->pp_auth_failures++; 4000 splx(x); 4001 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 4002 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 4003 0); 4004 chap.tld(sp); 4005 break; 4006 } 4007 sp->pp_auth_failures = 0; 4008 /* action sca, perhaps tlu */ 4009 if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 4010 sp->state[IDX_CHAP] == STATE_OPENED) 4011 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 4012 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 4013 0); 4014 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 4015 sppp_cp_change_state(&chap, sp, STATE_OPENED); 4016 chap.tlu(sp); 4017 } 4018 break; 4019 4020 default: 4021 /* Unknown CHAP packet type -- ignore. */ 4022 if (debug) { 4023 log(LOG_DEBUG, "%s: chap unknown input(%s) " 4024 "<0x%x id=0x%xh len=%d", 4025 ifp->if_xname, 4026 sppp_state_name(sp->state[IDX_CHAP]), 4027 h->type, h->ident, ntohs(h->len)); 4028 if (len > 4) 4029 sppp_print_bytes((u_char *)(h + 1), len - 4); 4030 addlog(">\n"); 4031 } 4032 break; 4033 4034 } 4035 } 4036 4037 static void 4038 sppp_chap_init(struct sppp *sp) 4039 { 4040 /* Chap doesn't have STATE_INITIAL at all. */ 4041 sp->state[IDX_CHAP] = STATE_CLOSED; 4042 sp->fail_counter[IDX_CHAP] = 0; 4043 sp->pp_seq[IDX_CHAP] = 0; 4044 sp->pp_rseq[IDX_CHAP] = 0; 4045 callout_init(&sp->ch[IDX_CHAP]); 4046 } 4047 4048 static void 4049 sppp_chap_open(struct sppp *sp) 4050 { 4051 if (sp->myauth.proto == PPP_CHAP && 4052 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4053 /* we are authenticator for CHAP, start it */ 4054 chap.scr(sp); 4055 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4056 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4057 } 4058 /* nothing to be done if we are peer, await a challenge */ 4059 } 4060 4061 static void 4062 sppp_chap_close(struct sppp *sp) 4063 { 4064 if (sp->state[IDX_CHAP] != STATE_CLOSED) 4065 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4066 } 4067 4068 static void 4069 sppp_chap_TO(void *cookie) 4070 { 4071 struct sppp *sp = (struct sppp *)cookie; 4072 STDDCL; 4073 int s; 4074 4075 s = splnet(); 4076 if (debug) 4077 log(LOG_DEBUG, "%s: chap TO(%s) rst_counter = %d\n", 4078 ifp->if_xname, 4079 sppp_state_name(sp->state[IDX_CHAP]), 4080 sp->rst_counter[IDX_CHAP]); 4081 4082 if (--sp->rst_counter[IDX_CHAP] < 0) 4083 /* TO- event */ 4084 switch (sp->state[IDX_CHAP]) { 4085 case STATE_REQ_SENT: 4086 chap.tld(sp); 4087 sppp_cp_change_state(&chap, sp, STATE_CLOSED); 4088 break; 4089 } 4090 else 4091 /* TO+ (or TO*) event */ 4092 switch (sp->state[IDX_CHAP]) { 4093 case STATE_OPENED: 4094 /* TO* event */ 4095 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4096 /* fall through */ 4097 case STATE_REQ_SENT: 4098 chap.scr(sp); 4099 /* sppp_cp_change_state() will restart the timer */ 4100 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 4101 break; 4102 } 4103 4104 splx(s); 4105 } 4106 4107 static void 4108 sppp_chap_tlu(struct sppp *sp) 4109 { 4110 STDDCL; 4111 int i, x; 4112 4113 i = 0; 4114 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 4115 4116 /* 4117 * Some broken CHAP implementations (Conware CoNet, firmware 4118 * 4.0.?) don't want to re-authenticate their CHAP once the 4119 * initial challenge-response exchange has taken place. 4120 * Provide for an option to avoid rechallenges. 4121 */ 4122 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) { 4123 /* 4124 * Compute the re-challenge timeout. This will yield 4125 * a number between 300 and 810 seconds. 4126 */ 4127 i = 300 + ((unsigned)(random() & 0xff00) >> 7); 4128 4129 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp); 4130 } 4131 4132 if (debug) { 4133 log(LOG_DEBUG, 4134 "%s: chap %s, ", 4135 ifp->if_xname, 4136 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu"); 4137 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) 4138 addlog("next re-challenge in %d seconds\n", i); 4139 else 4140 addlog("re-challenging supressed\n"); 4141 } 4142 4143 x = splnet(); 4144 sp->pp_auth_failures = 0; 4145 /* indicate to LCP that we need to be closed down */ 4146 sp->lcp.protos |= (1 << IDX_CHAP); 4147 4148 if (sp->pp_flags & PP_NEEDAUTH) { 4149 /* 4150 * Remote is authenticator, but his auth proto didn't 4151 * complete yet. Defer the transition to network 4152 * phase. 4153 */ 4154 splx(x); 4155 return; 4156 } 4157 splx(x); 4158 4159 /* 4160 * If we are already in phase network, we are done here. This 4161 * is the case if this is a dummy tlu event after a re-challenge. 4162 */ 4163 if (sp->pp_phase != SPPP_PHASE_NETWORK) 4164 sppp_phase_network(sp); 4165 } 4166 4167 static void 4168 sppp_chap_tld(struct sppp *sp) 4169 { 4170 STDDCL; 4171 4172 if (debug) 4173 log(LOG_DEBUG, "%s: chap tld\n", ifp->if_xname); 4174 callout_stop(&sp->ch[IDX_CHAP]); 4175 sp->lcp.protos &= ~(1 << IDX_CHAP); 4176 4177 lcp.Close(sp); 4178 } 4179 4180 static void 4181 sppp_chap_scr(struct sppp *sp) 4182 { 4183 struct timeval tv; 4184 u_int32_t *ch, seed; 4185 u_char clen; 4186 4187 if (sp->myauth.name == NULL) { 4188 /* can't do anything usefull */ 4189 printf("%s: chap starting without my name being set\n", 4190 sp->pp_if.if_xname); 4191 return; 4192 } 4193 4194 /* Compute random challenge. */ 4195 ch = (u_int32_t *)sp->myauth.challenge; 4196 microtime(&tv); 4197 seed = tv.tv_sec ^ tv.tv_usec; 4198 ch[0] = seed ^ random(); 4199 ch[1] = seed ^ random(); 4200 ch[2] = seed ^ random(); 4201 ch[3] = seed ^ random(); 4202 clen = 16; /* 4 * sizeof(u_int32_t) */ 4203 4204 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 4205 4206 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 4207 sizeof clen, (const char *)&clen, 4208 sizeof(sp->myauth.challenge), sp->myauth.challenge, 4209 sp->myauth.name_len, 4210 sp->myauth.name, 4211 0); 4212 } 4213 4214 /* 4215 *--------------------------------------------------------------------------* 4216 * * 4217 * The PAP implementation. * 4218 * * 4219 *--------------------------------------------------------------------------* 4220 */ 4221 /* 4222 * For PAP, we need to keep a little state also if we are the peer, not the 4223 * authenticator. This is since we don't get a request to authenticate, but 4224 * have to repeatedly authenticate ourself until we got a response (or the 4225 * retry counter is expired). 4226 */ 4227 4228 /* 4229 * Handle incoming PAP packets. */ 4230 static void 4231 sppp_pap_input(struct sppp *sp, struct mbuf *m) 4232 { 4233 STDDCL; 4234 struct lcp_header *h; 4235 int len, x; 4236 u_char mlen; 4237 char *name, *secret; 4238 int name_len, secret_len; 4239 4240 len = m->m_pkthdr.len; 4241 if (len < 5) { 4242 if (debug) 4243 log(LOG_DEBUG, 4244 "%s: pap invalid packet length: %d bytes\n", 4245 ifp->if_xname, len); 4246 return; 4247 } 4248 h = mtod(m, struct lcp_header *); 4249 if (len > ntohs(h->len)) 4250 len = ntohs(h->len); 4251 switch (h->type) { 4252 /* PAP request is my authproto */ 4253 case PAP_REQ: 4254 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) { 4255 /* can't do anything usefull */ 4256 printf("%s: pap request without his name and his secret being set\n", 4257 ifp->if_xname); 4258 break; 4259 } 4260 name = 1 + (u_char *)(h + 1); 4261 name_len = name[-1]; 4262 secret = name + name_len + 1; 4263 if (name_len > len - 6 || 4264 (secret_len = secret[-1]) > len - 6 - name_len) { 4265 if (debug) { 4266 log(LOG_DEBUG, "%s: pap corrupted input " 4267 "<%s id=0x%x len=%d", 4268 ifp->if_xname, 4269 sppp_auth_type_name(PPP_PAP, h->type), 4270 h->ident, ntohs(h->len)); 4271 if (len > 4) 4272 sppp_print_bytes((u_char *)(h + 1), 4273 len - 4); 4274 addlog(">\n"); 4275 } 4276 break; 4277 } 4278 if (debug) { 4279 log(LOG_DEBUG, "%s: pap input(%s) " 4280 "<%s id=0x%x len=%d name=", 4281 ifp->if_xname, 4282 sppp_state_name(sp->state[IDX_PAP]), 4283 sppp_auth_type_name(PPP_PAP, h->type), 4284 h->ident, ntohs(h->len)); 4285 sppp_print_string((char *)name, name_len); 4286 addlog(" secret="); 4287 sppp_print_string((char *)secret, secret_len); 4288 addlog(">\n"); 4289 } 4290 if (name_len != sp->hisauth.name_len || 4291 secret_len != sp->hisauth.secret_len || 4292 memcmp(name, sp->hisauth.name, name_len) != 0 || 4293 memcmp(secret, sp->hisauth.secret, secret_len) != 0) { 4294 /* action scn, tld */ 4295 sp->pp_auth_failures++; 4296 mlen = sizeof(FAILMSG) - 1; 4297 sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 4298 sizeof mlen, (const char *)&mlen, 4299 sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 4300 0); 4301 pap.tld(sp); 4302 break; 4303 } 4304 /* action sca, perhaps tlu */ 4305 if (sp->state[IDX_PAP] == STATE_REQ_SENT || 4306 sp->state[IDX_PAP] == STATE_OPENED) { 4307 mlen = sizeof(SUCCMSG) - 1; 4308 sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 4309 sizeof mlen, (const char *)&mlen, 4310 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 4311 0); 4312 } 4313 if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 4314 sppp_cp_change_state(&pap, sp, STATE_OPENED); 4315 pap.tlu(sp); 4316 } 4317 break; 4318 4319 /* ack and nak are his authproto */ 4320 case PAP_ACK: 4321 callout_stop(&sp->pap_my_to_ch); 4322 if (debug) { 4323 log(LOG_DEBUG, "%s: pap success", 4324 ifp->if_xname); 4325 name_len = *(char *)h; 4326 if (len > 5 && name_len) { 4327 addlog(": "); 4328 sppp_print_string((char *)(h + 1), name_len); 4329 } 4330 addlog("\n"); 4331 } 4332 x = splnet(); 4333 sp->pp_auth_failures = 0; 4334 sp->pp_flags &= ~PP_NEEDAUTH; 4335 if (sp->myauth.proto == PPP_PAP && 4336 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 4337 (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 4338 /* 4339 * We are authenticator for PAP but didn't 4340 * complete yet. Leave it to tlu to proceed 4341 * to network phase. 4342 */ 4343 splx(x); 4344 break; 4345 } 4346 splx(x); 4347 sppp_phase_network(sp); 4348 break; 4349 4350 case PAP_NAK: 4351 callout_stop(&sp->pap_my_to_ch); 4352 sp->pp_auth_failures++; 4353 if (debug) { 4354 log(LOG_INFO, "%s: pap failure", 4355 ifp->if_xname); 4356 name_len = *(char *)h; 4357 if (len > 5 && name_len) { 4358 addlog(": "); 4359 sppp_print_string((char *)(h + 1), name_len); 4360 } 4361 addlog("\n"); 4362 } else 4363 log(LOG_INFO, "%s: pap failure\n", 4364 ifp->if_xname); 4365 /* await LCP shutdown by authenticator */ 4366 break; 4367 4368 default: 4369 /* Unknown PAP packet type -- ignore. */ 4370 if (debug) { 4371 log(LOG_DEBUG, "%s: pap corrupted input " 4372 "<0x%x id=0x%x len=%d", 4373 ifp->if_xname, 4374 h->type, h->ident, ntohs(h->len)); 4375 if (len > 4) 4376 sppp_print_bytes((u_char *)(h + 1), len - 4); 4377 addlog(">\n"); 4378 } 4379 break; 4380 4381 } 4382 } 4383 4384 static void 4385 sppp_pap_init(struct sppp *sp) 4386 { 4387 /* PAP doesn't have STATE_INITIAL at all. */ 4388 sp->state[IDX_PAP] = STATE_CLOSED; 4389 sp->fail_counter[IDX_PAP] = 0; 4390 sp->pp_seq[IDX_PAP] = 0; 4391 sp->pp_rseq[IDX_PAP] = 0; 4392 callout_init(&sp->ch[IDX_PAP]); 4393 callout_init(&sp->pap_my_to_ch); 4394 } 4395 4396 static void 4397 sppp_pap_open(struct sppp *sp) 4398 { 4399 if (sp->hisauth.proto == PPP_PAP && 4400 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 4401 /* we are authenticator for PAP, start our timer */ 4402 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4403 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4404 } 4405 if (sp->myauth.proto == PPP_PAP) { 4406 /* we are peer, send a request, and start a timer */ 4407 pap.scr(sp); 4408 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout, 4409 sppp_pap_my_TO, sp); 4410 } 4411 } 4412 4413 static void 4414 sppp_pap_close(struct sppp *sp) 4415 { 4416 if (sp->state[IDX_PAP] != STATE_CLOSED) 4417 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4418 } 4419 4420 /* 4421 * That's the timeout routine if we are authenticator. Since the 4422 * authenticator is basically passive in PAP, we can't do much here. 4423 */ 4424 static void 4425 sppp_pap_TO(void *cookie) 4426 { 4427 struct sppp *sp = (struct sppp *)cookie; 4428 STDDCL; 4429 int s; 4430 4431 s = splnet(); 4432 if (debug) 4433 log(LOG_DEBUG, "%s: pap TO(%s) rst_counter = %d\n", 4434 ifp->if_xname, 4435 sppp_state_name(sp->state[IDX_PAP]), 4436 sp->rst_counter[IDX_PAP]); 4437 4438 if (--sp->rst_counter[IDX_PAP] < 0) 4439 /* TO- event */ 4440 switch (sp->state[IDX_PAP]) { 4441 case STATE_REQ_SENT: 4442 pap.tld(sp); 4443 sppp_cp_change_state(&pap, sp, STATE_CLOSED); 4444 break; 4445 } 4446 else 4447 /* TO+ event, not very much we could do */ 4448 switch (sp->state[IDX_PAP]) { 4449 case STATE_REQ_SENT: 4450 /* sppp_cp_change_state() will restart the timer */ 4451 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 4452 break; 4453 } 4454 4455 splx(s); 4456 } 4457 4458 /* 4459 * That's the timeout handler if we are peer. Since the peer is active, 4460 * we need to retransmit our PAP request since it is apparently lost. 4461 * XXX We should impose a max counter. 4462 */ 4463 static void 4464 sppp_pap_my_TO(void *cookie) 4465 { 4466 struct sppp *sp = (struct sppp *)cookie; 4467 STDDCL; 4468 4469 if (debug) 4470 log(LOG_DEBUG, "%s: pap peer TO\n", 4471 ifp->if_xname); 4472 4473 pap.scr(sp); 4474 } 4475 4476 static void 4477 sppp_pap_tlu(struct sppp *sp) 4478 { 4479 STDDCL; 4480 int x; 4481 4482 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 4483 4484 if (debug) 4485 log(LOG_DEBUG, "%s: %s tlu\n", 4486 ifp->if_xname, pap.name); 4487 4488 x = splnet(); 4489 sp->pp_auth_failures = 0; 4490 /* indicate to LCP that we need to be closed down */ 4491 sp->lcp.protos |= (1 << IDX_PAP); 4492 4493 if (sp->pp_flags & PP_NEEDAUTH) { 4494 /* 4495 * Remote is authenticator, but his auth proto didn't 4496 * complete yet. Defer the transition to network 4497 * phase. 4498 */ 4499 splx(x); 4500 return; 4501 } 4502 splx(x); 4503 sppp_phase_network(sp); 4504 } 4505 4506 static void 4507 sppp_pap_tld(struct sppp *sp) 4508 { 4509 STDDCL; 4510 4511 if (debug) 4512 log(LOG_DEBUG, "%s: pap tld\n", ifp->if_xname); 4513 callout_stop(&sp->ch[IDX_PAP]); 4514 callout_stop(&sp->pap_my_to_ch); 4515 sp->lcp.protos &= ~(1 << IDX_PAP); 4516 4517 lcp.Close(sp); 4518 } 4519 4520 static void 4521 sppp_pap_scr(struct sppp *sp) 4522 { 4523 u_char idlen, pwdlen; 4524 4525 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) { 4526 /* can't do anything usefull */ 4527 printf("%s: pap starting without my name and secret being set\n", 4528 sp->pp_if.if_xname); 4529 return; 4530 } 4531 4532 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 4533 pwdlen = sp->myauth.secret_len; 4534 idlen = sp->myauth.name_len; 4535 4536 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 4537 sizeof idlen, (const char *)&idlen, 4538 idlen, sp->myauth.name, 4539 sizeof pwdlen, (const char *)&pwdlen, 4540 pwdlen, sp->myauth.secret, 4541 0); 4542 } 4543 4544 /* 4545 * Random miscellaneous functions. 4546 */ 4547 4548 /* 4549 * Send a PAP or CHAP proto packet. 4550 * 4551 * Varadic function, each of the elements for the ellipsis is of type 4552 * ``size_t mlen, const u_char *msg''. Processing will stop iff 4553 * mlen == 0. 4554 * NOTE: never declare variadic functions with types subject to type 4555 * promotion (i.e. u_char). This is asking for big trouble depending 4556 * on the architecture you are on... 4557 */ 4558 4559 static void 4560 sppp_auth_send(const struct cp *cp, struct sppp *sp, 4561 unsigned int type, unsigned int id, 4562 ...) 4563 { 4564 STDDCL; 4565 struct lcp_header *lh; 4566 struct mbuf *m; 4567 u_char *p; 4568 int len; 4569 size_t pkthdrlen; 4570 unsigned int mlen; 4571 const char *msg; 4572 va_list ap; 4573 4574 MGETHDR(m, M_DONTWAIT, MT_DATA); 4575 if (! m) 4576 return; 4577 m->m_pkthdr.rcvif = 0; 4578 4579 if (sp->pp_flags & PP_NOFRAMING) { 4580 *mtod(m, u_int16_t *) = htons(cp->proto); 4581 pkthdrlen = 2; 4582 lh = (struct lcp_header *)(mtod(m, u_int8_t *)+2); 4583 } else { 4584 struct ppp_header *h; 4585 h = mtod(m, struct ppp_header *); 4586 h->address = PPP_ALLSTATIONS; /* broadcast address */ 4587 h->control = PPP_UI; /* Unnumbered Info */ 4588 h->protocol = htons(cp->proto); 4589 pkthdrlen = PPP_HEADER_LEN; 4590 4591 lh = (struct lcp_header *)(h + 1); 4592 } 4593 4594 lh->type = type; 4595 lh->ident = id; 4596 p = (u_char *)(lh + 1); 4597 4598 va_start(ap, id); 4599 len = 0; 4600 4601 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 4602 msg = va_arg(ap, const char *); 4603 len += mlen; 4604 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) { 4605 va_end(ap); 4606 m_freem(m); 4607 return; 4608 } 4609 4610 bcopy(msg, p, mlen); 4611 p += mlen; 4612 } 4613 va_end(ap); 4614 4615 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len; 4616 lh->len = htons(LCP_HEADER_LEN + len); 4617 4618 if (debug) { 4619 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d", 4620 ifp->if_xname, cp->name, 4621 sppp_auth_type_name(cp->proto, lh->type), 4622 lh->ident, ntohs(lh->len)); 4623 if (len) 4624 sppp_print_bytes((u_char *)(lh + 1), len); 4625 addlog(">\n"); 4626 } 4627 if (IF_QFULL(&sp->pp_cpq)) { 4628 IF_DROP(&sp->pp_fastq); 4629 IF_DROP(&ifp->if_snd); 4630 m_freem(m); 4631 ++ifp->if_oerrors; 4632 return; 4633 } else 4634 IF_ENQUEUE(&sp->pp_cpq, m); 4635 if (! (ifp->if_flags & IFF_OACTIVE)) 4636 (*ifp->if_start)(ifp); 4637 ifp->if_obytes += m->m_pkthdr.len + 3; 4638 } 4639 4640 /* 4641 * Send keepalive packets, every 10 seconds. 4642 */ 4643 static void 4644 sppp_keepalive(void *dummy) 4645 { 4646 struct sppp *sp; 4647 int s; 4648 time_t now; 4649 4650 s = splnet(); 4651 now = mono_time.tv_sec; 4652 for (sp=spppq; sp; sp=sp->pp_next) { 4653 struct ifnet *ifp = &sp->pp_if; 4654 4655 /* check idle timeout */ 4656 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING) 4657 && (sp->pp_phase == SPPP_PHASE_NETWORK)) { 4658 /* idle timeout is enabled for this interface */ 4659 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) { 4660 if (ifp->if_flags & IFF_DEBUG) 4661 printf("%s: no activitiy for %lu seconds\n", 4662 sp->pp_if.if_xname, 4663 (unsigned long)(now-sp->pp_last_activity)); 4664 lcp.Close(sp); 4665 continue; 4666 } 4667 } 4668 4669 /* Keepalive mode disabled or channel down? */ 4670 if (! (sp->pp_flags & PP_KEEPALIVE) || 4671 ! (ifp->if_flags & IFF_RUNNING)) 4672 continue; 4673 4674 /* No keepalive in PPP mode if LCP not opened yet. */ 4675 if (! (sp->pp_flags & PP_CISCO) && 4676 sp->pp_phase < SPPP_PHASE_AUTHENTICATE) 4677 continue; 4678 4679 /* No echo reply, but maybe user data passed through? */ 4680 if ((now - sp->pp_last_activity) < LCP_KEEPALIVE_INTERVAL) { 4681 sp->pp_alivecnt = 0; 4682 continue; 4683 } 4684 4685 if (sp->pp_alivecnt == MAXALIVECNT) { 4686 /* No keepalive packets got. Stop the interface. */ 4687 if_down (ifp); 4688 IF_PURGE(&sp->pp_cpq); 4689 if (! (sp->pp_flags & PP_CISCO)) { 4690 printf("%s: LCP keepalive timed out, going to restart the connection\n", 4691 ifp->if_xname); 4692 sp->pp_alivecnt = 0; 4693 4694 /* we are down, close all open protocols */ 4695 lcp.Close(sp); 4696 4697 /* And now prepare LCP to reestablish the link, if configured to do so. */ 4698 sppp_cp_change_state(&lcp, sp, STATE_STOPPED); 4699 4700 /* Close connection imediatly, completition of this 4701 * will summon the magic needed to reestablish it. */ 4702 sp->pp_tlf(sp); 4703 continue; 4704 } 4705 } 4706 if (sp->pp_alivecnt <= MAXALIVECNT) 4707 ++sp->pp_alivecnt; 4708 if (sp->pp_flags & PP_CISCO) 4709 sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ, 4710 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 4711 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) { 4712 int32_t nmagic = htonl(sp->lcp.magic); 4713 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 4714 sppp_cp_send(sp, PPP_LCP, ECHO_REQ, 4715 sp->lcp.echoid, 4, &nmagic); 4716 } 4717 } 4718 splx(s); 4719 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL); 4720 } 4721 4722 /* 4723 * Get both IP addresses. 4724 */ 4725 static void 4726 sppp_get_ip_addrs(struct sppp *sp, u_int32_t *src, u_int32_t *dst, u_int32_t *srcmask) 4727 { 4728 struct ifnet *ifp = &sp->pp_if; 4729 struct ifaddr *ifa; 4730 struct sockaddr_in *si, *sm; 4731 u_int32_t ssrc, ddst; 4732 4733 sm = NULL; 4734 ssrc = ddst = 0; 4735 /* 4736 * Pick the first AF_INET address from the list, 4737 * aliases don't make any sense on a p2p link anyway. 4738 */ 4739 si = 0; 4740 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { 4741 if (ifa->ifa_addr->sa_family == AF_INET) { 4742 si = (struct sockaddr_in *)ifa->ifa_addr; 4743 sm = (struct sockaddr_in *)ifa->ifa_netmask; 4744 if (si) 4745 break; 4746 } 4747 } 4748 if (ifa) { 4749 if (si && si->sin_addr.s_addr) { 4750 ssrc = si->sin_addr.s_addr; 4751 if (srcmask) 4752 *srcmask = ntohl(sm->sin_addr.s_addr); 4753 } 4754 4755 si = (struct sockaddr_in *)ifa->ifa_dstaddr; 4756 if (si && si->sin_addr.s_addr) 4757 ddst = si->sin_addr.s_addr; 4758 } 4759 4760 if (dst) *dst = ntohl(ddst); 4761 if (src) *src = ntohl(ssrc); 4762 } 4763 4764 /* 4765 * Set IP addresses. Must be called at splnet. 4766 * If an address is 0, leave it the way it is. 4767 */ 4768 static void 4769 sppp_set_ip_addrs(struct sppp *sp, u_int32_t myaddr, u_int32_t hisaddr) 4770 { 4771 STDDCL; 4772 struct ifaddr *ifa; 4773 struct sockaddr_in *si; 4774 struct sockaddr_in *dest; 4775 4776 /* 4777 * Pick the first AF_INET address from the list, 4778 * aliases don't make any sense on a p2p link anyway. 4779 */ 4780 4781 si = 0; 4782 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4783 { 4784 if (ifa->ifa_addr->sa_family == AF_INET) 4785 { 4786 si = (struct sockaddr_in *)ifa->ifa_addr; 4787 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4788 if (si) 4789 break; 4790 } 4791 } 4792 4793 if (ifa && si) 4794 { 4795 int error; 4796 struct sockaddr_in new_sin = *si; 4797 struct sockaddr_in new_dst = *dest; 4798 4799 /* 4800 * Scrub old routes now instead of calling in_ifinit with 4801 * scrub=1, because we may change the dstaddr 4802 * before the call to in_ifinit. 4803 */ 4804 in_ifscrub(ifp, ifatoia(ifa)); 4805 4806 if (myaddr != 0) 4807 new_sin.sin_addr.s_addr = htonl(myaddr); 4808 if (hisaddr != 0) { 4809 new_dst.sin_addr.s_addr = htonl(hisaddr); 4810 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) { 4811 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr; 4812 *dest = new_dst; /* fix dstaddr in place */ 4813 } 4814 } 4815 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4816 if(debug && error) 4817 { 4818 log(LOG_DEBUG, "%s: sppp_set_ip_addrs: in_ifinit " 4819 " failed, error=%d\n", ifp->if_xname, error); 4820 } 4821 } 4822 } 4823 4824 /* 4825 * Clear IP addresses. Must be called at splnet. 4826 */ 4827 static void 4828 sppp_clear_ip_addrs(struct sppp *sp) 4829 { 4830 struct ifnet *ifp = &sp->pp_if; 4831 struct ifaddr *ifa; 4832 struct sockaddr_in *si; 4833 struct sockaddr_in *dest; 4834 4835 u_int32_t remote; 4836 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4837 remote = sp->ipcp.saved_hisaddr; 4838 else 4839 sppp_get_ip_addrs(sp, 0, &remote, 0); 4840 4841 /* 4842 * Pick the first AF_INET address from the list, 4843 * aliases don't make any sense on a p2p link anyway. 4844 */ 4845 4846 si = 0; 4847 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4848 { 4849 if (ifa->ifa_addr->sa_family == AF_INET) 4850 { 4851 si = (struct sockaddr_in *)ifa->ifa_addr; 4852 dest = (struct sockaddr_in *)ifa->ifa_dstaddr; 4853 if (si) 4854 break; 4855 } 4856 } 4857 4858 if (ifa && si) 4859 { 4860 struct sockaddr_in new_sin = *si; 4861 4862 in_ifscrub(ifp, ifatoia(ifa)); 4863 if (sp->ipcp.flags & IPCP_MYADDR_DYN) 4864 new_sin.sin_addr.s_addr = 0; 4865 if (sp->ipcp.flags & IPCP_HISADDR_DYN) 4866 /* replace peer addr in place */ 4867 dest->sin_addr.s_addr = sp->ipcp.saved_hisaddr; 4868 in_ifinit(ifp, ifatoia(ifa), &new_sin, 0); 4869 } 4870 } 4871 4872 #ifdef INET6 4873 /* 4874 * Get both IPv6 addresses. 4875 */ 4876 static void 4877 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 4878 struct in6_addr *srcmask) 4879 { 4880 struct ifnet *ifp = &sp->pp_if; 4881 struct ifaddr *ifa; 4882 struct sockaddr_in6 *si, *sm; 4883 struct in6_addr ssrc, ddst; 4884 4885 sm = NULL; 4886 memset(&ssrc, 0, sizeof(ssrc)); 4887 memset(&ddst, 0, sizeof(ddst)); 4888 /* 4889 * Pick the first link-local AF_INET6 address from the list, 4890 * aliases don't make any sense on a p2p link anyway. 4891 */ 4892 si = 0; 4893 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4894 if (ifa->ifa_addr->sa_family == AF_INET6) { 4895 si = (struct sockaddr_in6 *)ifa->ifa_addr; 4896 sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 4897 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) 4898 break; 4899 } 4900 if (ifa) { 4901 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 4902 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc)); 4903 if (srcmask) { 4904 bcopy(&sm->sin6_addr, srcmask, 4905 sizeof(*srcmask)); 4906 } 4907 } 4908 4909 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 4910 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 4911 bcopy(&si->sin6_addr, &ddst, sizeof(ddst)); 4912 } 4913 4914 if (dst) 4915 bcopy(&ddst, dst, sizeof(*dst)); 4916 if (src) 4917 bcopy(&ssrc, src, sizeof(*src)); 4918 } 4919 4920 #ifdef IPV6CP_MYIFID_DYN 4921 /* 4922 * Generate random ifid. 4923 */ 4924 static void 4925 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 4926 { 4927 /* TBD */ 4928 } 4929 4930 /* 4931 * Set my IPv6 address. Must be called at splnet. 4932 */ 4933 static void 4934 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 4935 { 4936 STDDCL; 4937 struct ifaddr *ifa; 4938 struct sockaddr_in6 *sin6; 4939 4940 /* 4941 * Pick the first link-local AF_INET6 address from the list, 4942 * aliases don't make any sense on a p2p link anyway. 4943 */ 4944 4945 sin6 = NULL; 4946 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) 4947 { 4948 if (ifa->ifa_addr->sa_family == AF_INET6) 4949 { 4950 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 4951 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 4952 break; 4953 } 4954 } 4955 4956 if (ifa && sin6) 4957 { 4958 int error; 4959 struct sockaddr_in6 new_sin6 = *sin6; 4960 4961 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr)); 4962 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 4963 if (debug && error) 4964 { 4965 log(LOG_DEBUG, "%s: sppp_set_ip6_addr: in6_ifinit " 4966 " failed, error=%d\n", ifp->if_xname, error); 4967 } 4968 } 4969 } 4970 #endif 4971 4972 /* 4973 * Suggest a candidate address to be used by peer. 4974 */ 4975 static void 4976 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 4977 { 4978 struct in6_addr myaddr; 4979 struct timeval tv; 4980 4981 sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 4982 4983 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 4984 microtime(&tv); 4985 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 4986 myaddr.s6_addr[14] ^= 0xff; 4987 myaddr.s6_addr[15] ^= 0xff; 4988 } else { 4989 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 4990 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 4991 } 4992 if (suggest) 4993 bcopy(&myaddr, suggest, sizeof(myaddr)); 4994 } 4995 #endif /*INET6*/ 4996 4997 /* 4998 * Process ioctl requests specific to the PPP interface. 4999 * Permissions have already been checked. 5000 */ 5001 static int 5002 sppp_params(struct sppp *sp, int cmd, void *data) 5003 { 5004 switch (cmd) { 5005 case SPPPGETAUTHCFG: 5006 { 5007 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5008 int error; 5009 size_t len; 5010 5011 cfg->myauthflags = sp->myauth.flags; 5012 cfg->hisauthflags = sp->hisauth.flags; 5013 strncpy(cfg->ifname, sp->pp_if.if_xname, IFNAMSIZ); 5014 cfg->hisauth = 0; 5015 if (sp->hisauth.proto) 5016 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5017 cfg->myauth = 0; 5018 if (sp->myauth.proto) 5019 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP; 5020 if (cfg->myname_length == 0) { 5021 if (sp->myauth.name != NULL) 5022 cfg->myname_length = sp->myauth.name_len + 1; 5023 } else { 5024 if (sp->myauth.name == NULL) { 5025 cfg->myname_length = 0; 5026 } else { 5027 len = sp->myauth.name_len + 1; 5028 if (cfg->myname_length < len) 5029 return (ENAMETOOLONG); 5030 error = copyout(sp->myauth.name, cfg->myname, len); 5031 if (error) return error; 5032 } 5033 } 5034 if (cfg->hisname_length == 0) { 5035 if(sp->hisauth.name != NULL) 5036 cfg->hisname_length = sp->hisauth.name_len + 1; 5037 } else { 5038 if (sp->hisauth.name == NULL) { 5039 cfg->hisname_length = 0; 5040 } else { 5041 len = sp->hisauth.name_len + 1; 5042 if (cfg->hisname_length < len) 5043 return (ENAMETOOLONG); 5044 error = copyout(sp->hisauth.name, cfg->hisname, len); 5045 if (error) return error; 5046 } 5047 } 5048 } 5049 break; 5050 case SPPPSETAUTHCFG: 5051 { 5052 struct spppauthcfg *cfg = (struct spppauthcfg *)data; 5053 int error; 5054 5055 if (sp->myauth.name) { 5056 free(sp->myauth.name, M_DEVBUF); 5057 sp->myauth.name = NULL; 5058 } 5059 if (sp->myauth.secret) { 5060 free(sp->myauth.secret, M_DEVBUF); 5061 sp->myauth.secret = NULL; 5062 } 5063 if (sp->hisauth.name) { 5064 free(sp->hisauth.name, M_DEVBUF); 5065 sp->hisauth.name = NULL; 5066 } 5067 if (sp->hisauth.secret) { 5068 free(sp->hisauth.secret, M_DEVBUF); 5069 sp->hisauth.secret = NULL; 5070 } 5071 5072 if (cfg->hisname != NULL && cfg->hisname_length > 0) { 5073 if (cfg->hisname_length >= MCLBYTES) 5074 return (ENAMETOOLONG); 5075 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK); 5076 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length); 5077 if (error) { 5078 free(sp->hisauth.name, M_DEVBUF); 5079 sp->hisauth.name = NULL; 5080 return error; 5081 } 5082 sp->hisauth.name_len = cfg->hisname_length - 1; 5083 sp->hisauth.name[sp->hisauth.name_len] = 0; 5084 } 5085 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) { 5086 if (cfg->hissecret_length >= MCLBYTES) 5087 return (ENAMETOOLONG); 5088 sp->hisauth.secret = malloc(cfg->hissecret_length, M_DEVBUF, M_WAITOK); 5089 error = copyin(cfg->hissecret, sp->hisauth.secret, cfg->hissecret_length); 5090 if (error) { 5091 free(sp->hisauth.secret, M_DEVBUF); 5092 sp->hisauth.secret = NULL; 5093 return error; 5094 } 5095 sp->hisauth.secret_len = cfg->hissecret_length - 1; 5096 sp->hisauth.secret[sp->hisauth.secret_len] = 0; 5097 } 5098 if (cfg->myname != NULL && cfg->myname_length > 0) { 5099 if (cfg->myname_length >= MCLBYTES) 5100 return (ENAMETOOLONG); 5101 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK); 5102 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length); 5103 if (error) { 5104 free(sp->myauth.name, M_DEVBUF); 5105 sp->myauth.name = NULL; 5106 return error; 5107 } 5108 sp->myauth.name_len = cfg->myname_length - 1; 5109 sp->myauth.name[sp->myauth.name_len] = 0; 5110 } 5111 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) { 5112 if (cfg->mysecret_length >= MCLBYTES) 5113 return (ENAMETOOLONG); 5114 sp->myauth.secret = malloc(cfg->mysecret_length, M_DEVBUF, M_WAITOK); 5115 error = copyin(cfg->mysecret, sp->myauth.secret, cfg->mysecret_length); 5116 if (error) { 5117 free(sp->myauth.secret, M_DEVBUF); 5118 sp->myauth.secret = NULL; 5119 return error; 5120 } 5121 sp->myauth.secret_len = cfg->mysecret_length - 1; 5122 sp->myauth.secret[sp->myauth.secret_len] = 0; 5123 } 5124 sp->myauth.flags = cfg->myauthflags; 5125 if (cfg->myauth) 5126 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5127 sp->hisauth.flags = cfg->hisauthflags; 5128 if (cfg->hisauth) 5129 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP; 5130 sp->pp_auth_failures = 0; 5131 if (sp->hisauth.proto != 0) 5132 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 5133 else 5134 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 5135 } 5136 break; 5137 case SPPPGETLCPCFG: 5138 { 5139 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5140 lcp->lcp_timeout = sp->lcp.timeout; 5141 } 5142 break; 5143 case SPPPSETLCPCFG: 5144 { 5145 struct sppplcpcfg *lcp = (struct sppplcpcfg *)data; 5146 sp->lcp.timeout = lcp->lcp_timeout; 5147 } 5148 break; 5149 case SPPPGETSTATUS: 5150 { 5151 struct spppstatus *status = (struct spppstatus *)data; 5152 status->phase = sp->pp_phase; 5153 } 5154 break; 5155 case SPPPGETIDLETO: 5156 { 5157 struct spppidletimeout *to = (struct spppidletimeout *)data; 5158 to->idle_seconds = sp->pp_idle_timeout; 5159 } 5160 break; 5161 case SPPPSETIDLETO: 5162 { 5163 struct spppidletimeout *to = (struct spppidletimeout *)data; 5164 sp->pp_idle_timeout = to->idle_seconds; 5165 } 5166 break; 5167 case SPPPSETAUTHFAILURE: 5168 { 5169 struct spppauthfailuresettings *afsettings = (struct spppauthfailuresettings *)data; 5170 sp->pp_max_auth_fail = afsettings->max_failures; 5171 sp->pp_auth_failures = 0; 5172 } 5173 break; 5174 case SPPPGETAUTHFAILURES: 5175 { 5176 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data; 5177 stats->auth_failures = sp->pp_auth_failures; 5178 stats->max_failures = sp->pp_max_auth_fail; 5179 } 5180 break; 5181 case SPPPSETDNSOPTS: 5182 { 5183 struct spppdnssettings *req = (struct spppdnssettings *)data; 5184 sp->query_dns = req->query_dns & 3; 5185 } 5186 break; 5187 case SPPPGETDNSOPTS: 5188 { 5189 struct spppdnssettings *req = (struct spppdnssettings *)data; 5190 req->query_dns = sp->query_dns; 5191 } 5192 break; 5193 case SPPPGETDNSADDRS: 5194 { 5195 struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data; 5196 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns); 5197 } 5198 break; 5199 default: 5200 return (EINVAL); 5201 } 5202 5203 return (0); 5204 } 5205 5206 static void 5207 sppp_phase_network(struct sppp *sp) 5208 { 5209 STDDCL; 5210 int i; 5211 u_int32_t mask; 5212 5213 sp->pp_phase = SPPP_PHASE_NETWORK; 5214 5215 if(debug) 5216 { 5217 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname, 5218 sppp_phase_name(sp->pp_phase)); 5219 } 5220 5221 /* Notify NCPs now. */ 5222 for (i = 0; i < IDX_COUNT; i++) 5223 if ((cps[i])->flags & CP_NCP) 5224 (cps[i])->Open(sp); 5225 5226 /* Send Up events to all NCPs. */ 5227 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 5228 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP)) 5229 (cps[i])->Up(sp); 5230 5231 /* if no NCP is starting, all this was in vain, close down */ 5232 sppp_lcp_check_and_close(sp); 5233 } 5234 5235 5236 static const char * 5237 sppp_cp_type_name(u_char type) 5238 { 5239 static char buf[12]; 5240 switch (type) { 5241 case CONF_REQ: return "conf-req"; 5242 case CONF_ACK: return "conf-ack"; 5243 case CONF_NAK: return "conf-nak"; 5244 case CONF_REJ: return "conf-rej"; 5245 case TERM_REQ: return "term-req"; 5246 case TERM_ACK: return "term-ack"; 5247 case CODE_REJ: return "code-rej"; 5248 case PROTO_REJ: return "proto-rej"; 5249 case ECHO_REQ: return "echo-req"; 5250 case ECHO_REPLY: return "echo-reply"; 5251 case DISC_REQ: return "discard-req"; 5252 } 5253 sprintf (buf, "0x%x", type); 5254 return buf; 5255 } 5256 5257 static const char * 5258 sppp_auth_type_name(u_short proto, u_char type) 5259 { 5260 static char buf[12]; 5261 switch (proto) { 5262 case PPP_CHAP: 5263 switch (type) { 5264 case CHAP_CHALLENGE: return "challenge"; 5265 case CHAP_RESPONSE: return "response"; 5266 case CHAP_SUCCESS: return "success"; 5267 case CHAP_FAILURE: return "failure"; 5268 } 5269 case PPP_PAP: 5270 switch (type) { 5271 case PAP_REQ: return "req"; 5272 case PAP_ACK: return "ack"; 5273 case PAP_NAK: return "nak"; 5274 } 5275 } 5276 sprintf (buf, "0x%x", type); 5277 return buf; 5278 } 5279 5280 static const char * 5281 sppp_lcp_opt_name(u_char opt) 5282 { 5283 static char buf[12]; 5284 switch (opt) { 5285 case LCP_OPT_MRU: return "mru"; 5286 case LCP_OPT_ASYNC_MAP: return "async-map"; 5287 case LCP_OPT_AUTH_PROTO: return "auth-proto"; 5288 case LCP_OPT_QUAL_PROTO: return "qual-proto"; 5289 case LCP_OPT_MAGIC: return "magic"; 5290 case LCP_OPT_PROTO_COMP: return "proto-comp"; 5291 case LCP_OPT_ADDR_COMP: return "addr-comp"; 5292 } 5293 sprintf (buf, "0x%x", opt); 5294 return buf; 5295 } 5296 5297 static const char * 5298 sppp_ipcp_opt_name(u_char opt) 5299 { 5300 static char buf[12]; 5301 switch (opt) { 5302 case IPCP_OPT_ADDRESSES: return "addresses"; 5303 case IPCP_OPT_COMPRESSION: return "compression"; 5304 case IPCP_OPT_ADDRESS: return "address"; 5305 } 5306 sprintf (buf, "0x%x", opt); 5307 return buf; 5308 } 5309 5310 #ifdef INET6 5311 static const char * 5312 sppp_ipv6cp_opt_name(u_char opt) 5313 { 5314 static char buf[12]; 5315 switch (opt) { 5316 case IPV6CP_OPT_IFID: return "ifid"; 5317 case IPV6CP_OPT_COMPRESSION: return "compression"; 5318 } 5319 sprintf (buf, "0x%x", opt); 5320 return buf; 5321 } 5322 #endif 5323 5324 static const char * 5325 sppp_state_name(int state) 5326 { 5327 switch (state) { 5328 case STATE_INITIAL: return "initial"; 5329 case STATE_STARTING: return "starting"; 5330 case STATE_CLOSED: return "closed"; 5331 case STATE_STOPPED: return "stopped"; 5332 case STATE_CLOSING: return "closing"; 5333 case STATE_STOPPING: return "stopping"; 5334 case STATE_REQ_SENT: return "req-sent"; 5335 case STATE_ACK_RCVD: return "ack-rcvd"; 5336 case STATE_ACK_SENT: return "ack-sent"; 5337 case STATE_OPENED: return "opened"; 5338 } 5339 return "illegal"; 5340 } 5341 5342 static const char * 5343 sppp_phase_name(int phase) 5344 { 5345 switch (phase) { 5346 case SPPP_PHASE_DEAD: return "dead"; 5347 case SPPP_PHASE_ESTABLISH: return "establish"; 5348 case SPPP_PHASE_TERMINATE: return "terminate"; 5349 case SPPP_PHASE_AUTHENTICATE: return "authenticate"; 5350 case SPPP_PHASE_NETWORK: return "network"; 5351 } 5352 return "illegal"; 5353 } 5354 5355 static const char * 5356 sppp_proto_name(u_short proto) 5357 { 5358 static char buf[12]; 5359 switch (proto) { 5360 case PPP_LCP: return "lcp"; 5361 case PPP_IPCP: return "ipcp"; 5362 case PPP_PAP: return "pap"; 5363 case PPP_CHAP: return "chap"; 5364 case PPP_IPV6CP: return "ipv6cp"; 5365 } 5366 sprintf(buf, "0x%x", (unsigned)proto); 5367 return buf; 5368 } 5369 5370 static void 5371 sppp_print_bytes(const u_char *p, u_short len) 5372 { 5373 addlog(" %02x", *p++); 5374 while (--len > 0) 5375 addlog("-%02x", *p++); 5376 } 5377 5378 static void 5379 sppp_print_string(const char *p, u_short len) 5380 { 5381 u_char c; 5382 5383 while (len-- > 0) { 5384 c = *p++; 5385 /* 5386 * Print only ASCII chars directly. RFC 1994 recommends 5387 * using only them, but we don't rely on it. */ 5388 if (c < ' ' || c > '~') 5389 addlog("\\x%x", c); 5390 else 5391 addlog("%c", c); 5392 } 5393 } 5394 5395 static const char * 5396 sppp_dotted_quad(u_int32_t addr) 5397 { 5398 static char s[16]; 5399 sprintf(s, "%d.%d.%d.%d", 5400 (int)((addr >> 24) & 0xff), 5401 (int)((addr >> 16) & 0xff), 5402 (int)((addr >> 8) & 0xff), 5403 (int)(addr & 0xff)); 5404 return s; 5405 } 5406 5407 /* a dummy, used to drop uninteresting events */ 5408 static void 5409 sppp_null(struct sppp *unused) 5410 { 5411 /* do just nothing */ 5412 } 5413 /* 5414 * This file is large. Tell emacs to highlight it nevertheless. 5415 * 5416 * Local Variables: 5417 * hilit-auto-highlight-maxout: 120000 5418 * End: 5419 */ 5420
Indexes created Tue Oct 14 06:10:07 GMT 2025