| 1 | /* $NetBSD: if_pppoe.c,v 1.119 2016/11/18 08:13:02 knakahara Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2002, 2008 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Martin Husemann <martin@NetBSD.org>. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | #include <sys/cdefs.h> |
| 33 | __KERNEL_RCSID(0, "$NetBSD: if_pppoe.c,v 1.119 2016/11/18 08:13:02 knakahara Exp $" ); |
| 34 | |
| 35 | #ifdef _KERNEL_OPT |
| 36 | #include "pppoe.h" |
| 37 | #include "opt_pppoe.h" |
| 38 | #endif |
| 39 | |
| 40 | #include <sys/param.h> |
| 41 | #include <sys/systm.h> |
| 42 | #include <sys/kernel.h> |
| 43 | #include <sys/callout.h> |
| 44 | #include <sys/malloc.h> |
| 45 | #include <sys/mbuf.h> |
| 46 | #include <sys/socket.h> |
| 47 | #include <sys/proc.h> |
| 48 | #include <sys/ioctl.h> |
| 49 | #include <sys/kauth.h> |
| 50 | #include <sys/intr.h> |
| 51 | #include <sys/socketvar.h> |
| 52 | #include <sys/device.h> |
| 53 | #include <sys/module.h> |
| 54 | #include <sys/sysctl.h> |
| 55 | |
| 56 | #include <net/if.h> |
| 57 | #include <net/if_types.h> |
| 58 | #include <net/if_ether.h> |
| 59 | #include <net/if_sppp.h> |
| 60 | #include <net/if_spppvar.h> |
| 61 | #include <net/if_pppoe.h> |
| 62 | |
| 63 | #include <net/bpf.h> |
| 64 | |
| 65 | #include "ioconf.h" |
| 66 | |
| 67 | struct pppoehdr { |
| 68 | uint8_t vertype; |
| 69 | uint8_t code; |
| 70 | uint16_t session; |
| 71 | uint16_t plen; |
| 72 | } __packed; |
| 73 | |
| 74 | struct pppoetag { |
| 75 | uint16_t tag; |
| 76 | uint16_t len; |
| 77 | } __packed; |
| 78 | |
| 79 | #define sizeof(struct pppoehdr) |
| 80 | #define PPPOE_OVERHEAD (PPPOE_HEADERLEN + 2) |
| 81 | #define PPPOE_VERTYPE 0x11 /* VER=1, TYPE = 1 */ |
| 82 | |
| 83 | #define PPPOE_TAG_EOL 0x0000 /* end of list */ |
| 84 | #define PPPOE_TAG_SNAME 0x0101 /* service name */ |
| 85 | #define PPPOE_TAG_ACNAME 0x0102 /* access concentrator name */ |
| 86 | #define PPPOE_TAG_HUNIQUE 0x0103 /* host unique */ |
| 87 | #define PPPOE_TAG_ACCOOKIE 0x0104 /* AC cookie */ |
| 88 | #define PPPOE_TAG_VENDOR 0x0105 /* vendor specific */ |
| 89 | #define PPPOE_TAG_RELAYSID 0x0110 /* relay session id */ |
| 90 | #define PPPOE_TAG_MAX_PAYLOAD 0x0120 /* max payload */ |
| 91 | #define PPPOE_TAG_SNAME_ERR 0x0201 /* service name error */ |
| 92 | #define PPPOE_TAG_ACSYS_ERR 0x0202 /* AC system error */ |
| 93 | #define PPPOE_TAG_GENERIC_ERR 0x0203 /* generic error */ |
| 94 | |
| 95 | #define PPPOE_CODE_PADI 0x09 /* Active Discovery Initiation */ |
| 96 | #define PPPOE_CODE_PADO 0x07 /* Active Discovery Offer */ |
| 97 | #define PPPOE_CODE_PADR 0x19 /* Active Discovery Request */ |
| 98 | #define PPPOE_CODE_PADS 0x65 /* Active Discovery Session confirmation */ |
| 99 | #define PPPOE_CODE_PADT 0xA7 /* Active Discovery Terminate */ |
| 100 | |
| 101 | /* two byte PPP protocol discriminator, then IP data */ |
| 102 | #define PPPOE_MAXMTU (ETHERMTU - PPPOE_OVERHEAD) |
| 103 | |
| 104 | /* Add a 16 bit unsigned value to a buffer pointed to by PTR */ |
| 105 | #define PPPOE_ADD_16(PTR, VAL) \ |
| 106 | *(PTR)++ = (VAL) / 256; \ |
| 107 | *(PTR)++ = (VAL) % 256 |
| 108 | |
| 109 | /* Add a complete PPPoE header to the buffer pointed to by PTR */ |
| 110 | #define (PTR, CODE, SESS, LEN) \ |
| 111 | *(PTR)++ = PPPOE_VERTYPE; \ |
| 112 | *(PTR)++ = (CODE); \ |
| 113 | PPPOE_ADD_16(PTR, SESS); \ |
| 114 | PPPOE_ADD_16(PTR, LEN) |
| 115 | |
| 116 | #define PPPOE_DISC_TIMEOUT (hz*5) /* base for quick timeout calculation */ |
| 117 | #define PPPOE_SLOW_RETRY (hz*60) /* persistent retry interval */ |
| 118 | #define PPPOE_RECON_FAST (hz*15) /* first retry after auth failure */ |
| 119 | #define PPPOE_RECON_IMMEDIATE (hz/10) /* "no delay" reconnect */ |
| 120 | #define PPPOE_DISC_MAXPADI 4 /* retry PADI four times (quickly) */ |
| 121 | #define PPPOE_DISC_MAXPADR 2 /* retry PADR twice */ |
| 122 | |
| 123 | #ifdef PPPOE_SERVER |
| 124 | /* from if_spppsubr.c */ |
| 125 | #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ |
| 126 | #endif |
| 127 | |
| 128 | struct pppoe_softc { |
| 129 | struct sppp sc_sppp; /* contains a struct ifnet as first element */ |
| 130 | LIST_ENTRY(pppoe_softc) sc_list; |
| 131 | struct ifnet *sc_eth_if; /* ethernet interface we are using */ |
| 132 | |
| 133 | int sc_state; /* discovery phase or session connected */ |
| 134 | struct ether_addr sc_dest; /* hardware address of concentrator */ |
| 135 | uint16_t sc_session; /* PPPoE session id */ |
| 136 | |
| 137 | char *sc_service_name; /* if != NULL: requested name of service */ |
| 138 | char *sc_concentrator_name; /* if != NULL: requested concentrator id */ |
| 139 | uint8_t *sc_ac_cookie; /* content of AC cookie we must echo back */ |
| 140 | size_t sc_ac_cookie_len; /* length of cookie data */ |
| 141 | uint8_t *sc_relay_sid; /* content of relay SID we must echo back */ |
| 142 | size_t sc_relay_sid_len; /* length of relay SID data */ |
| 143 | #ifdef PPPOE_SERVER |
| 144 | uint8_t *sc_hunique; /* content of host unique we must echo back */ |
| 145 | size_t sc_hunique_len; /* length of host unique */ |
| 146 | #endif |
| 147 | callout_t sc_timeout; /* timeout while not in session state */ |
| 148 | int sc_padi_retried; /* number of PADI retries already done */ |
| 149 | int sc_padr_retried; /* number of PADR retries already done */ |
| 150 | }; |
| 151 | |
| 152 | /* incoming traffic will be queued here */ |
| 153 | struct ifqueue ppoediscinq = { .ifq_maxlen = IFQ_MAXLEN }; |
| 154 | struct ifqueue ppoeinq = { .ifq_maxlen = IFQ_MAXLEN }; |
| 155 | |
| 156 | void *pppoe_softintr = NULL; |
| 157 | static void pppoe_softintr_handler(void *); |
| 158 | |
| 159 | extern int sppp_ioctl(struct ifnet *, unsigned long, void *); |
| 160 | |
| 161 | /* input routines */ |
| 162 | static void pppoeintr(void); |
| 163 | static void pppoe_disc_input(struct mbuf *); |
| 164 | static void pppoe_dispatch_disc_pkt(struct mbuf *, int); |
| 165 | static void pppoe_data_input(struct mbuf *); |
| 166 | static void pppoe_enqueue(struct ifqueue *, struct mbuf *); |
| 167 | |
| 168 | /* management routines */ |
| 169 | static int pppoe_connect(struct pppoe_softc *); |
| 170 | static int pppoe_disconnect(struct pppoe_softc *); |
| 171 | static void pppoe_abort_connect(struct pppoe_softc *); |
| 172 | static int pppoe_ioctl(struct ifnet *, unsigned long, void *); |
| 173 | static void pppoe_tls(struct sppp *); |
| 174 | static void pppoe_tlf(struct sppp *); |
| 175 | static void pppoe_start(struct ifnet *); |
| 176 | static void pppoe_clear_softc(struct pppoe_softc *, const char *); |
| 177 | |
| 178 | /* internal timeout handling */ |
| 179 | static void pppoe_timeout(void *); |
| 180 | |
| 181 | /* sending actual protocol controll packets */ |
| 182 | static int pppoe_send_padi(struct pppoe_softc *); |
| 183 | static int pppoe_send_padr(struct pppoe_softc *); |
| 184 | #ifdef PPPOE_SERVER |
| 185 | static int pppoe_send_pado(struct pppoe_softc *); |
| 186 | static int pppoe_send_pads(struct pppoe_softc *); |
| 187 | #endif |
| 188 | static int pppoe_send_padt(struct ifnet *, u_int, const uint8_t *); |
| 189 | |
| 190 | /* raw output */ |
| 191 | static int pppoe_output(struct pppoe_softc *, struct mbuf *); |
| 192 | |
| 193 | /* internal helper functions */ |
| 194 | static struct pppoe_softc * pppoe_find_softc_by_session(u_int, struct ifnet *); |
| 195 | static struct pppoe_softc * pppoe_find_softc_by_hunique(uint8_t *, size_t, struct ifnet *); |
| 196 | static struct mbuf *pppoe_get_mbuf(size_t len); |
| 197 | |
| 198 | static int pppoe_ifattach_hook(void *, struct mbuf **, struct ifnet *, int); |
| 199 | |
| 200 | static LIST_HEAD(pppoe_softc_head, pppoe_softc) pppoe_softc_list; |
| 201 | |
| 202 | static int pppoe_clone_create(struct if_clone *, int); |
| 203 | static int pppoe_clone_destroy(struct ifnet *); |
| 204 | |
| 205 | static bool pppoe_term_unknown = false; |
| 206 | |
| 207 | static struct sysctllog *pppoe_sysctl_clog; |
| 208 | static void sysctl_net_pppoe_setup(struct sysctllog **); |
| 209 | |
| 210 | static struct if_clone pppoe_cloner = |
| 211 | IF_CLONE_INITIALIZER("pppoe" , pppoe_clone_create, pppoe_clone_destroy); |
| 212 | |
| 213 | /* ARGSUSED */ |
| 214 | void |
| 215 | pppoeattach(int count) |
| 216 | { |
| 217 | |
| 218 | /* |
| 219 | * Nothing to do here, initialization is handled by the |
| 220 | * module initialization code in pppoeinit() below). |
| 221 | */ |
| 222 | } |
| 223 | |
| 224 | static void |
| 225 | pppoeinit(void) |
| 226 | { |
| 227 | |
| 228 | LIST_INIT(&pppoe_softc_list); |
| 229 | if_clone_attach(&pppoe_cloner); |
| 230 | |
| 231 | pppoe_softintr = softint_establish(SOFTINT_NET, pppoe_softintr_handler, |
| 232 | NULL); |
| 233 | sysctl_net_pppoe_setup(&pppoe_sysctl_clog); |
| 234 | |
| 235 | IFQ_LOCK_INIT(&ppoediscinq); |
| 236 | IFQ_LOCK_INIT(&ppoeinq); |
| 237 | } |
| 238 | |
| 239 | static int |
| 240 | pppoedetach(void) |
| 241 | { |
| 242 | int error = 0; |
| 243 | |
| 244 | if (!LIST_EMPTY(&pppoe_softc_list)) |
| 245 | error = EBUSY; |
| 246 | |
| 247 | if (error == 0) { |
| 248 | if_clone_detach(&pppoe_cloner); |
| 249 | softint_disestablish(pppoe_softintr); |
| 250 | /* Remove our sysctl sub-tree */ |
| 251 | sysctl_teardown(&pppoe_sysctl_clog); |
| 252 | } |
| 253 | |
| 254 | return error; |
| 255 | } |
| 256 | |
| 257 | static int |
| 258 | pppoe_clone_create(struct if_clone *ifc, int unit) |
| 259 | { |
| 260 | struct pppoe_softc *sc; |
| 261 | |
| 262 | sc = malloc(sizeof(struct pppoe_softc), M_DEVBUF, M_WAITOK|M_ZERO); |
| 263 | |
| 264 | if_initname(&sc->sc_sppp.pp_if, "pppoe" , unit); |
| 265 | sc->sc_sppp.pp_if.if_softc = sc; |
| 266 | sc->sc_sppp.pp_if.if_mtu = PPPOE_MAXMTU; |
| 267 | sc->sc_sppp.pp_if.if_flags = IFF_SIMPLEX|IFF_POINTOPOINT|IFF_MULTICAST; |
| 268 | sc->sc_sppp.pp_if.if_type = IFT_PPP; |
| 269 | sc->sc_sppp.pp_if.if_hdrlen = sizeof(struct ether_header) + PPPOE_HEADERLEN; |
| 270 | sc->sc_sppp.pp_if.if_dlt = DLT_PPP_ETHER; |
| 271 | sc->sc_sppp.pp_flags |= PP_KEEPALIVE | /* use LCP keepalive */ |
| 272 | PP_NOFRAMING; /* no serial encapsulation */ |
| 273 | sc->sc_sppp.pp_if.if_ioctl = pppoe_ioctl; |
| 274 | IFQ_SET_MAXLEN(&sc->sc_sppp.pp_if.if_snd, IFQ_MAXLEN); |
| 275 | IFQ_SET_READY(&sc->sc_sppp.pp_if.if_snd); |
| 276 | |
| 277 | /* changed to real address later */ |
| 278 | memcpy(&sc->sc_dest, etherbroadcastaddr, sizeof(sc->sc_dest)); |
| 279 | |
| 280 | callout_init(&sc->sc_timeout, 0); |
| 281 | |
| 282 | sc->sc_sppp.pp_if.if_start = pppoe_start; |
| 283 | sc->sc_sppp.pp_tls = pppoe_tls; |
| 284 | sc->sc_sppp.pp_tlf = pppoe_tlf; |
| 285 | sc->sc_sppp.pp_framebytes = PPPOE_HEADERLEN; /* framing added to ppp packets */ |
| 286 | |
| 287 | if_initialize(&sc->sc_sppp.pp_if); |
| 288 | sc->sc_sppp.pp_if.if_percpuq = if_percpuq_create(&sc->sc_sppp.pp_if); |
| 289 | sppp_attach(&sc->sc_sppp.pp_if); |
| 290 | if_register(&sc->sc_sppp.pp_if); |
| 291 | |
| 292 | bpf_attach(&sc->sc_sppp.pp_if, DLT_PPP_ETHER, 0); |
| 293 | if (LIST_EMPTY(&pppoe_softc_list)) { |
| 294 | pfil_add_hook(pppoe_ifattach_hook, NULL, PFIL_IFNET, if_pfil); |
| 295 | } |
| 296 | LIST_INSERT_HEAD(&pppoe_softc_list, sc, sc_list); |
| 297 | return 0; |
| 298 | } |
| 299 | |
| 300 | static int |
| 301 | pppoe_clone_destroy(struct ifnet *ifp) |
| 302 | { |
| 303 | struct pppoe_softc * sc = ifp->if_softc; |
| 304 | |
| 305 | callout_stop(&sc->sc_timeout); |
| 306 | LIST_REMOVE(sc, sc_list); |
| 307 | if (LIST_EMPTY(&pppoe_softc_list)) { |
| 308 | pfil_remove_hook(pppoe_ifattach_hook, NULL, PFIL_IFNET, if_pfil); |
| 309 | } |
| 310 | bpf_detach(ifp); |
| 311 | sppp_detach(&sc->sc_sppp.pp_if); |
| 312 | if_detach(ifp); |
| 313 | if (sc->sc_concentrator_name) |
| 314 | free(sc->sc_concentrator_name, M_DEVBUF); |
| 315 | if (sc->sc_service_name) |
| 316 | free(sc->sc_service_name, M_DEVBUF); |
| 317 | if (sc->sc_ac_cookie) |
| 318 | free(sc->sc_ac_cookie, M_DEVBUF); |
| 319 | if (sc->sc_relay_sid) |
| 320 | free(sc->sc_relay_sid, M_DEVBUF); |
| 321 | callout_destroy(&sc->sc_timeout); |
| 322 | free(sc, M_DEVBUF); |
| 323 | |
| 324 | return (0); |
| 325 | } |
| 326 | |
| 327 | /* |
| 328 | * Find the interface handling the specified session. |
| 329 | * Note: O(number of sessions open), this is a client-side only, mean |
| 330 | * and lean implementation, so number of open sessions typically should |
| 331 | * be 1. |
| 332 | */ |
| 333 | static struct pppoe_softc * |
| 334 | pppoe_find_softc_by_session(u_int session, struct ifnet *rcvif) |
| 335 | { |
| 336 | struct pppoe_softc *sc; |
| 337 | |
| 338 | if (session == 0) |
| 339 | return NULL; |
| 340 | |
| 341 | LIST_FOREACH(sc, &pppoe_softc_list, sc_list) { |
| 342 | if (sc->sc_state == PPPOE_STATE_SESSION |
| 343 | && sc->sc_session == session |
| 344 | && sc->sc_eth_if == rcvif) |
| 345 | return sc; |
| 346 | } |
| 347 | return NULL; |
| 348 | } |
| 349 | |
| 350 | /* Check host unique token passed and return appropriate softc pointer, |
| 351 | * or NULL if token is bogus. */ |
| 352 | static struct pppoe_softc * |
| 353 | pppoe_find_softc_by_hunique(uint8_t *token, size_t len, struct ifnet *rcvif) |
| 354 | { |
| 355 | struct pppoe_softc *sc, *t; |
| 356 | |
| 357 | if (LIST_EMPTY(&pppoe_softc_list)) |
| 358 | return NULL; |
| 359 | |
| 360 | if (len != sizeof sc) |
| 361 | return NULL; |
| 362 | memcpy(&t, token, len); |
| 363 | |
| 364 | LIST_FOREACH(sc, &pppoe_softc_list, sc_list) |
| 365 | if (sc == t) break; |
| 366 | |
| 367 | if (sc == NULL) { |
| 368 | #ifdef PPPOE_DEBUG |
| 369 | printf("pppoe: alien host unique tag, no session found\n" ); |
| 370 | #endif |
| 371 | return NULL; |
| 372 | } |
| 373 | |
| 374 | /* should be safe to access *sc now */ |
| 375 | if (sc->sc_state < PPPOE_STATE_PADI_SENT || sc->sc_state >= PPPOE_STATE_SESSION) { |
| 376 | printf("%s: host unique tag found, but it belongs to a connection in state %d\n" , |
| 377 | sc->sc_sppp.pp_if.if_xname, sc->sc_state); |
| 378 | return NULL; |
| 379 | } |
| 380 | if (sc->sc_eth_if != rcvif) { |
| 381 | printf("%s: wrong interface, not accepting host unique\n" , |
| 382 | sc->sc_sppp.pp_if.if_xname); |
| 383 | return NULL; |
| 384 | } |
| 385 | return sc; |
| 386 | } |
| 387 | |
| 388 | static void |
| 389 | pppoe_softintr_handler(void *dummy) |
| 390 | { |
| 391 | /* called at splsoftnet() */ |
| 392 | mutex_enter(softnet_lock); |
| 393 | pppoeintr(); |
| 394 | mutex_exit(softnet_lock); |
| 395 | } |
| 396 | |
| 397 | /* called at appropriate protection level */ |
| 398 | static void |
| 399 | pppoeintr(void) |
| 400 | { |
| 401 | struct mbuf *m; |
| 402 | int disc_done, data_done; |
| 403 | |
| 404 | do { |
| 405 | disc_done = 0; |
| 406 | data_done = 0; |
| 407 | for (;;) { |
| 408 | IFQ_LOCK(&ppoediscinq); |
| 409 | IF_DEQUEUE(&ppoediscinq, m); |
| 410 | IFQ_UNLOCK(&ppoediscinq); |
| 411 | if (m == NULL) break; |
| 412 | disc_done = 1; |
| 413 | pppoe_disc_input(m); |
| 414 | } |
| 415 | |
| 416 | for (;;) { |
| 417 | IFQ_LOCK(&ppoeinq); |
| 418 | IF_DEQUEUE(&ppoeinq, m); |
| 419 | IFQ_UNLOCK(&ppoeinq); |
| 420 | if (m == NULL) break; |
| 421 | data_done = 1; |
| 422 | pppoe_data_input(m); |
| 423 | } |
| 424 | } while (disc_done || data_done); |
| 425 | } |
| 426 | |
| 427 | /* analyze and handle a single received packet while not in session state */ |
| 428 | static void |
| 429 | pppoe_dispatch_disc_pkt(struct mbuf *m, int off) |
| 430 | { |
| 431 | uint16_t tag, len; |
| 432 | uint16_t session, plen; |
| 433 | struct pppoe_softc *sc; |
| 434 | const char *err_msg, *devname; |
| 435 | char *error; |
| 436 | uint8_t *ac_cookie; |
| 437 | size_t ac_cookie_len; |
| 438 | uint8_t *relay_sid; |
| 439 | size_t relay_sid_len; |
| 440 | #ifdef PPPOE_SERVER |
| 441 | uint8_t *hunique; |
| 442 | size_t hunique_len; |
| 443 | #endif |
| 444 | struct pppoehdr *ph; |
| 445 | struct pppoetag *pt; |
| 446 | struct mbuf *n; |
| 447 | int noff, err, errortag; |
| 448 | struct ether_header *eh; |
| 449 | |
| 450 | devname = "pppoe" ; /* as long as we don't know which instance */ |
| 451 | err_msg = NULL; |
| 452 | errortag = 0; |
| 453 | if (m->m_len < sizeof(*eh)) { |
| 454 | m = m_pullup(m, sizeof(*eh)); |
| 455 | if (!m) |
| 456 | goto done; |
| 457 | } |
| 458 | eh = mtod(m, struct ether_header *); |
| 459 | off += sizeof(*eh); |
| 460 | |
| 461 | ac_cookie = NULL; |
| 462 | ac_cookie_len = 0; |
| 463 | relay_sid = NULL; |
| 464 | relay_sid_len = 0; |
| 465 | #ifdef PPPOE_SERVER |
| 466 | hunique = NULL; |
| 467 | hunique_len = 0; |
| 468 | #endif |
| 469 | session = 0; |
| 470 | if (m->m_pkthdr.len - off <= PPPOE_HEADERLEN) { |
| 471 | printf("pppoe: packet too short: %d\n" , m->m_pkthdr.len); |
| 472 | goto done; |
| 473 | } |
| 474 | |
| 475 | n = m_pulldown(m, off, sizeof(*ph), &noff); |
| 476 | if (!n) { |
| 477 | printf("pppoe: could not get PPPoE header\n" ); |
| 478 | m = NULL; |
| 479 | goto done; |
| 480 | } |
| 481 | ph = (struct pppoehdr *)(mtod(n, char *) + noff); |
| 482 | if (ph->vertype != PPPOE_VERTYPE) { |
| 483 | printf("pppoe: unknown version/type packet: 0x%x\n" , |
| 484 | ph->vertype); |
| 485 | goto done; |
| 486 | } |
| 487 | session = ntohs(ph->session); |
| 488 | plen = ntohs(ph->plen); |
| 489 | off += sizeof(*ph); |
| 490 | |
| 491 | if (plen + off > m->m_pkthdr.len) { |
| 492 | printf("pppoe: packet content does not fit: data available = %d, packet size = %u\n" , |
| 493 | m->m_pkthdr.len - off, plen); |
| 494 | goto done; |
| 495 | } |
| 496 | m_adj(m, off + plen - m->m_pkthdr.len); /* ignore trailing garbage */ |
| 497 | tag = 0; |
| 498 | len = 0; |
| 499 | sc = NULL; |
| 500 | while (off + sizeof(*pt) <= m->m_pkthdr.len) { |
| 501 | n = m_pulldown(m, off, sizeof(*pt), &noff); |
| 502 | if (!n) { |
| 503 | printf("%s: parse error\n" , devname); |
| 504 | m = NULL; |
| 505 | goto done; |
| 506 | } |
| 507 | pt = (struct pppoetag *)(mtod(n, char *) + noff); |
| 508 | tag = ntohs(pt->tag); |
| 509 | len = ntohs(pt->len); |
| 510 | if (off + len + sizeof(*pt) > m->m_pkthdr.len) { |
| 511 | printf("pppoe: tag 0x%x len 0x%x is too long\n" , |
| 512 | tag, len); |
| 513 | goto done; |
| 514 | } |
| 515 | switch (tag) { |
| 516 | case PPPOE_TAG_EOL: |
| 517 | goto breakbreak; |
| 518 | case PPPOE_TAG_SNAME: |
| 519 | break; /* ignored */ |
| 520 | case PPPOE_TAG_ACNAME: |
| 521 | error = NULL; |
| 522 | if (sc != NULL && len > 0) { |
| 523 | error = malloc(len+1, M_TEMP, M_NOWAIT); |
| 524 | if (error) { |
| 525 | n = m_pulldown(m, off + sizeof(*pt), |
| 526 | len, &noff); |
| 527 | if (n) { |
| 528 | strlcpy(error, |
| 529 | mtod(n, char*) + noff, |
| 530 | len); |
| 531 | } |
| 532 | printf("%s: connected to %s\n" , |
| 533 | devname, error); |
| 534 | free(error, M_TEMP); |
| 535 | } |
| 536 | } |
| 537 | break; /* ignored */ |
| 538 | case PPPOE_TAG_HUNIQUE: { |
| 539 | struct ifnet *rcvif; |
| 540 | int s; |
| 541 | if (sc != NULL) |
| 542 | break; |
| 543 | n = m_pulldown(m, off + sizeof(*pt), len, &noff); |
| 544 | if (!n) { |
| 545 | m = NULL; |
| 546 | err_msg = "TAG HUNIQUE ERROR" ; |
| 547 | break; |
| 548 | } |
| 549 | #ifdef PPPOE_SERVER |
| 550 | hunique = mtod(n, uint8_t *) + noff; |
| 551 | hunique_len = len; |
| 552 | #endif |
| 553 | rcvif = m_get_rcvif(m, &s); |
| 554 | sc = pppoe_find_softc_by_hunique(mtod(n, char *) + noff, |
| 555 | len, rcvif); |
| 556 | m_put_rcvif(rcvif, &s); |
| 557 | if (sc != NULL) |
| 558 | devname = sc->sc_sppp.pp_if.if_xname; |
| 559 | break; |
| 560 | } |
| 561 | case PPPOE_TAG_ACCOOKIE: |
| 562 | if (ac_cookie == NULL) { |
| 563 | n = m_pulldown(m, off + sizeof(*pt), len, |
| 564 | &noff); |
| 565 | if (!n) { |
| 566 | err_msg = "TAG ACCOOKIE ERROR" ; |
| 567 | m = NULL; |
| 568 | break; |
| 569 | } |
| 570 | ac_cookie = mtod(n, char *) + noff; |
| 571 | ac_cookie_len = len; |
| 572 | } |
| 573 | break; |
| 574 | case PPPOE_TAG_RELAYSID: |
| 575 | if (relay_sid == NULL) { |
| 576 | n = m_pulldown(m, off + sizeof(*pt), len, |
| 577 | &noff); |
| 578 | if (!n) { |
| 579 | err_msg = "TAG RELAYSID ERROR" ; |
| 580 | m = NULL; |
| 581 | break; |
| 582 | } |
| 583 | relay_sid = mtod(n, char *) + noff; |
| 584 | relay_sid_len = len; |
| 585 | } |
| 586 | break; |
| 587 | case PPPOE_TAG_SNAME_ERR: |
| 588 | err_msg = "SERVICE NAME ERROR" ; |
| 589 | errortag = 1; |
| 590 | break; |
| 591 | case PPPOE_TAG_ACSYS_ERR: |
| 592 | err_msg = "AC SYSTEM ERROR" ; |
| 593 | errortag = 1; |
| 594 | break; |
| 595 | case PPPOE_TAG_GENERIC_ERR: |
| 596 | err_msg = "GENERIC ERROR" ; |
| 597 | errortag = 1; |
| 598 | break; |
| 599 | } |
| 600 | if (err_msg) { |
| 601 | error = NULL; |
| 602 | if (errortag && len) { |
| 603 | error = malloc(len+1, M_TEMP, M_NOWAIT); |
| 604 | n = m_pulldown(m, off + sizeof(*pt), len, |
| 605 | &noff); |
| 606 | if (n && error) { |
| 607 | strlcpy(error, |
| 608 | mtod(n, char *) + noff, len); |
| 609 | } |
| 610 | } |
| 611 | if (error) { |
| 612 | printf("%s: %s: %s\n" , devname, |
| 613 | err_msg, error); |
| 614 | free(error, M_TEMP); |
| 615 | } else |
| 616 | printf("%s: %s\n" , devname, err_msg); |
| 617 | if (errortag || m == NULL) |
| 618 | goto done; |
| 619 | } |
| 620 | off += sizeof(*pt) + len; |
| 621 | } |
| 622 | breakbreak:; |
| 623 | switch (ph->code) { |
| 624 | case PPPOE_CODE_PADI: |
| 625 | #ifdef PPPOE_SERVER |
| 626 | /* |
| 627 | * got service name, concentrator name, and/or host unique. |
| 628 | * ignore if we have no interfaces with IFF_PASSIVE|IFF_UP. |
| 629 | */ |
| 630 | if (LIST_EMPTY(&pppoe_softc_list)) |
| 631 | goto done; |
| 632 | LIST_FOREACH(sc, &pppoe_softc_list, sc_list) { |
| 633 | if (!(sc->sc_sppp.pp_if.if_flags & IFF_UP)) |
| 634 | continue; |
| 635 | if (!(sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) |
| 636 | continue; |
| 637 | if (sc->sc_state == PPPOE_STATE_INITIAL) |
| 638 | break; |
| 639 | } |
| 640 | if (sc == NULL) { |
| 641 | /* printf("pppoe: free passive interface is not found\n");*/ |
| 642 | goto done; |
| 643 | } |
| 644 | if (hunique) { |
| 645 | if (sc->sc_hunique) |
| 646 | free(sc->sc_hunique, M_DEVBUF); |
| 647 | sc->sc_hunique = malloc(hunique_len, M_DEVBUF, |
| 648 | M_DONTWAIT); |
| 649 | if (sc->sc_hunique == NULL) |
| 650 | goto done; |
| 651 | sc->sc_hunique_len = hunique_len; |
| 652 | memcpy(sc->sc_hunique, hunique, hunique_len); |
| 653 | } |
| 654 | memcpy(&sc->sc_dest, eh->ether_shost, sizeof sc->sc_dest); |
| 655 | sc->sc_state = PPPOE_STATE_PADO_SENT; |
| 656 | pppoe_send_pado(sc); |
| 657 | break; |
| 658 | #endif /* PPPOE_SERVER */ |
| 659 | case PPPOE_CODE_PADR: |
| 660 | #ifdef PPPOE_SERVER |
| 661 | /* |
| 662 | * get sc from ac_cookie if IFF_PASSIVE |
| 663 | */ |
| 664 | if (ac_cookie == NULL) { |
| 665 | /* be quiet if there is not a single pppoe instance */ |
| 666 | printf("pppoe: received PADR but not includes ac_cookie\n" ); |
| 667 | goto done; |
| 668 | } |
| 669 | sc = pppoe_find_softc_by_hunique(ac_cookie, |
| 670 | ac_cookie_len, |
| 671 | m_get_rcvif_NOMPSAFE(m)); |
| 672 | if (sc == NULL) { |
| 673 | /* be quiet if there is not a single pppoe instance */ |
| 674 | if (!LIST_EMPTY(&pppoe_softc_list)) |
| 675 | printf("pppoe: received PADR but could not find request for it\n" ); |
| 676 | goto done; |
| 677 | } |
| 678 | if (sc->sc_state != PPPOE_STATE_PADO_SENT) { |
| 679 | printf("%s: received unexpected PADR\n" , |
| 680 | sc->sc_sppp.pp_if.if_xname); |
| 681 | goto done; |
| 682 | } |
| 683 | if (hunique) { |
| 684 | if (sc->sc_hunique) |
| 685 | free(sc->sc_hunique, M_DEVBUF); |
| 686 | sc->sc_hunique = malloc(hunique_len, M_DEVBUF, |
| 687 | M_DONTWAIT); |
| 688 | if (sc->sc_hunique == NULL) |
| 689 | goto done; |
| 690 | sc->sc_hunique_len = hunique_len; |
| 691 | memcpy(sc->sc_hunique, hunique, hunique_len); |
| 692 | } |
| 693 | pppoe_send_pads(sc); |
| 694 | sc->sc_state = PPPOE_STATE_SESSION; |
| 695 | sc->sc_sppp.pp_up(&sc->sc_sppp); |
| 696 | break; |
| 697 | #else |
| 698 | /* ignore, we are no access concentrator */ |
| 699 | goto done; |
| 700 | #endif /* PPPOE_SERVER */ |
| 701 | case PPPOE_CODE_PADO: |
| 702 | if (sc == NULL) { |
| 703 | /* be quiet if there is not a single pppoe instance */ |
| 704 | if (!LIST_EMPTY(&pppoe_softc_list)) |
| 705 | printf("pppoe: received PADO but could not find request for it\n" ); |
| 706 | goto done; |
| 707 | } |
| 708 | if (sc->sc_state != PPPOE_STATE_PADI_SENT) { |
| 709 | printf("%s: received unexpected PADO\n" , |
| 710 | sc->sc_sppp.pp_if.if_xname); |
| 711 | goto done; |
| 712 | } |
| 713 | if (ac_cookie) { |
| 714 | if (sc->sc_ac_cookie) |
| 715 | free(sc->sc_ac_cookie, M_DEVBUF); |
| 716 | sc->sc_ac_cookie = malloc(ac_cookie_len, M_DEVBUF, |
| 717 | M_DONTWAIT); |
| 718 | if (sc->sc_ac_cookie == NULL) { |
| 719 | printf("%s: FATAL: could not allocate memory " |
| 720 | "for AC cookie\n" , |
| 721 | sc->sc_sppp.pp_if.if_xname); |
| 722 | goto done; |
| 723 | } |
| 724 | sc->sc_ac_cookie_len = ac_cookie_len; |
| 725 | memcpy(sc->sc_ac_cookie, ac_cookie, ac_cookie_len); |
| 726 | } |
| 727 | if (relay_sid) { |
| 728 | if (sc->sc_relay_sid) |
| 729 | free(sc->sc_relay_sid, M_DEVBUF); |
| 730 | sc->sc_relay_sid = malloc(relay_sid_len, M_DEVBUF, |
| 731 | M_DONTWAIT); |
| 732 | if (sc->sc_relay_sid == NULL) { |
| 733 | printf("%s: FATAL: could not allocate memory " |
| 734 | "for relay SID\n" , |
| 735 | sc->sc_sppp.pp_if.if_xname); |
| 736 | goto done; |
| 737 | } |
| 738 | sc->sc_relay_sid_len = relay_sid_len; |
| 739 | memcpy(sc->sc_relay_sid, relay_sid, relay_sid_len); |
| 740 | } |
| 741 | memcpy(&sc->sc_dest, eh->ether_shost, sizeof sc->sc_dest); |
| 742 | callout_stop(&sc->sc_timeout); |
| 743 | sc->sc_padr_retried = 0; |
| 744 | sc->sc_state = PPPOE_STATE_PADR_SENT; |
| 745 | if ((err = pppoe_send_padr(sc)) != 0) { |
| 746 | if (sc->sc_sppp.pp_if.if_flags & IFF_DEBUG) |
| 747 | printf("%s: failed to send PADR, " |
| 748 | "error=%d\n" , sc->sc_sppp.pp_if.if_xname, |
| 749 | err); |
| 750 | } |
| 751 | callout_reset(&sc->sc_timeout, |
| 752 | PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), |
| 753 | pppoe_timeout, sc); |
| 754 | break; |
| 755 | case PPPOE_CODE_PADS: |
| 756 | if (sc == NULL) |
| 757 | goto done; |
| 758 | sc->sc_session = session; |
| 759 | callout_stop(&sc->sc_timeout); |
| 760 | if (sc->sc_sppp.pp_if.if_flags & IFF_DEBUG) |
| 761 | printf("%s: session 0x%x connected\n" , |
| 762 | sc->sc_sppp.pp_if.if_xname, session); |
| 763 | sc->sc_state = PPPOE_STATE_SESSION; |
| 764 | sc->sc_sppp.pp_up(&sc->sc_sppp); /* notify upper layers */ |
| 765 | break; |
| 766 | case PPPOE_CODE_PADT: { |
| 767 | struct ifnet *rcvif; |
| 768 | int s; |
| 769 | |
| 770 | rcvif = m_get_rcvif(m, &s); |
| 771 | sc = pppoe_find_softc_by_session(session, rcvif); |
| 772 | m_put_rcvif(rcvif, &s); |
| 773 | if (sc == NULL) |
| 774 | goto done; |
| 775 | pppoe_clear_softc(sc, "received PADT" ); |
| 776 | break; |
| 777 | } |
| 778 | default: |
| 779 | printf("%s: unknown code (0x%04x) session = 0x%04x\n" , |
| 780 | sc? sc->sc_sppp.pp_if.if_xname : "pppoe" , |
| 781 | ph->code, session); |
| 782 | break; |
| 783 | } |
| 784 | |
| 785 | done: |
| 786 | if (m) |
| 787 | m_freem(m); |
| 788 | return; |
| 789 | } |
| 790 | |
| 791 | static void |
| 792 | pppoe_disc_input(struct mbuf *m) |
| 793 | { |
| 794 | |
| 795 | /* avoid error messages if there is not a single pppoe instance */ |
| 796 | if (!LIST_EMPTY(&pppoe_softc_list)) { |
| 797 | KASSERT(m->m_flags & M_PKTHDR); |
| 798 | pppoe_dispatch_disc_pkt(m, 0); |
| 799 | } else |
| 800 | m_freem(m); |
| 801 | } |
| 802 | |
| 803 | static void |
| 804 | pppoe_data_input(struct mbuf *m) |
| 805 | { |
| 806 | uint16_t session, plen; |
| 807 | struct pppoe_softc *sc; |
| 808 | struct pppoehdr *ph; |
| 809 | struct ifnet *rcvif; |
| 810 | struct psref psref; |
| 811 | uint8_t shost[ETHER_ADDR_LEN]; |
| 812 | |
| 813 | KASSERT(m->m_flags & M_PKTHDR); |
| 814 | |
| 815 | if (pppoe_term_unknown) |
| 816 | memcpy(shost, mtod(m, struct ether_header*)->ether_shost, |
| 817 | ETHER_ADDR_LEN); |
| 818 | m_adj(m, sizeof(struct ether_header)); |
| 819 | if (m->m_pkthdr.len <= PPPOE_HEADERLEN) { |
| 820 | printf("pppoe (data): dropping too short packet: %d bytes\n" , |
| 821 | m->m_pkthdr.len); |
| 822 | goto drop; |
| 823 | } |
| 824 | |
| 825 | if (m->m_len < sizeof(*ph)) { |
| 826 | m = m_pullup(m, sizeof(*ph)); |
| 827 | if (!m) { |
| 828 | printf("pppoe: could not get PPPoE header\n" ); |
| 829 | return; |
| 830 | } |
| 831 | } |
| 832 | ph = mtod(m, struct pppoehdr *); |
| 833 | |
| 834 | if (ph->vertype != PPPOE_VERTYPE) { |
| 835 | printf("pppoe (data): unknown version/type packet: 0x%x\n" , |
| 836 | ph->vertype); |
| 837 | goto drop; |
| 838 | } |
| 839 | if (ph->code != 0) |
| 840 | goto drop; |
| 841 | |
| 842 | session = ntohs(ph->session); |
| 843 | rcvif = m_get_rcvif_psref(m, &psref); |
| 844 | if (__predict_false(rcvif == NULL)) |
| 845 | goto drop; |
| 846 | sc = pppoe_find_softc_by_session(session, rcvif); |
| 847 | if (sc == NULL) { |
| 848 | if (pppoe_term_unknown) { |
| 849 | printf("pppoe: input for unknown session %#x, " |
| 850 | "sending PADT\n" , session); |
| 851 | pppoe_send_padt(rcvif, session, shost); |
| 852 | } |
| 853 | m_put_rcvif_psref(rcvif, &psref); |
| 854 | goto drop; |
| 855 | } |
| 856 | m_put_rcvif_psref(rcvif, &psref); |
| 857 | |
| 858 | plen = ntohs(ph->plen); |
| 859 | |
| 860 | bpf_mtap(&sc->sc_sppp.pp_if, m); |
| 861 | |
| 862 | m_adj(m, PPPOE_HEADERLEN); |
| 863 | |
| 864 | #ifdef PPPOE_DEBUG |
| 865 | { |
| 866 | struct mbuf *p; |
| 867 | |
| 868 | printf("%s: pkthdr.len=%d, pppoe.len=%d" , |
| 869 | sc->sc_sppp.pp_if.if_xname, |
| 870 | m->m_pkthdr.len, plen); |
| 871 | p = m; |
| 872 | while (p) { |
| 873 | printf(" l=%d" , p->m_len); |
| 874 | p = p->m_next; |
| 875 | } |
| 876 | printf("\n" ); |
| 877 | } |
| 878 | #endif |
| 879 | |
| 880 | if (m->m_pkthdr.len < plen) |
| 881 | goto drop; |
| 882 | |
| 883 | /* fix incoming interface pointer (not the raw ethernet interface anymore) */ |
| 884 | m_set_rcvif(m, &sc->sc_sppp.pp_if); |
| 885 | |
| 886 | /* pass packet up and account for it */ |
| 887 | sc->sc_sppp.pp_if.if_ipackets++; |
| 888 | sppp_input(&sc->sc_sppp.pp_if, m); |
| 889 | return; |
| 890 | |
| 891 | drop: |
| 892 | m_freem(m); |
| 893 | } |
| 894 | |
| 895 | static int |
| 896 | pppoe_output(struct pppoe_softc *sc, struct mbuf *m) |
| 897 | { |
| 898 | struct sockaddr dst; |
| 899 | struct ether_header *eh; |
| 900 | uint16_t etype; |
| 901 | |
| 902 | if (sc->sc_eth_if == NULL) { |
| 903 | m_freem(m); |
| 904 | return EIO; |
| 905 | } |
| 906 | |
| 907 | memset(&dst, 0, sizeof dst); |
| 908 | dst.sa_family = AF_UNSPEC; |
| 909 | eh = (struct ether_header*)&dst.sa_data; |
| 910 | etype = sc->sc_state == PPPOE_STATE_SESSION ? ETHERTYPE_PPPOE : ETHERTYPE_PPPOEDISC; |
| 911 | eh->ether_type = htons(etype); |
| 912 | memcpy(&eh->ether_dhost, &sc->sc_dest, sizeof sc->sc_dest); |
| 913 | |
| 914 | #ifdef PPPOE_DEBUG |
| 915 | printf("%s (%x) state=%d, session=0x%x output -> %s, len=%d\n" , |
| 916 | sc->sc_sppp.pp_if.if_xname, etype, |
| 917 | sc->sc_state, sc->sc_session, |
| 918 | ether_sprintf((const unsigned char *)&sc->sc_dest), m->m_pkthdr.len); |
| 919 | #endif |
| 920 | |
| 921 | m->m_flags &= ~(M_BCAST|M_MCAST); |
| 922 | sc->sc_sppp.pp_if.if_opackets++; |
| 923 | return if_output_lock(sc->sc_eth_if, sc->sc_eth_if, m, &dst, NULL); |
| 924 | } |
| 925 | |
| 926 | static int |
| 927 | pppoe_ioctl(struct ifnet *ifp, unsigned long cmd, void *data) |
| 928 | { |
| 929 | struct lwp *l = curlwp; /* XXX */ |
| 930 | struct pppoe_softc *sc = (struct pppoe_softc*)ifp; |
| 931 | struct ifreq *ifr = data; |
| 932 | int error = 0; |
| 933 | |
| 934 | switch (cmd) { |
| 935 | case PPPOESETPARMS: |
| 936 | { |
| 937 | struct pppoediscparms *parms = (struct pppoediscparms*)data; |
| 938 | if (kauth_authorize_network(l->l_cred, KAUTH_NETWORK_INTERFACE, |
| 939 | KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd, |
| 940 | NULL) != 0) |
| 941 | return (EPERM); |
| 942 | if (parms->eth_ifname[0] != 0) { |
| 943 | struct ifnet *eth_if; |
| 944 | |
| 945 | eth_if = ifunit(parms->eth_ifname); |
| 946 | if (eth_if == NULL || eth_if->if_dlt != DLT_EN10MB) { |
| 947 | sc->sc_eth_if = NULL; |
| 948 | return ENXIO; |
| 949 | } |
| 950 | |
| 951 | if (sc->sc_sppp.pp_if.if_mtu != |
| 952 | eth_if->if_mtu - PPPOE_OVERHEAD) { |
| 953 | sc->sc_sppp.pp_if.if_mtu = eth_if->if_mtu - |
| 954 | PPPOE_OVERHEAD; |
| 955 | } |
| 956 | sc->sc_eth_if = eth_if; |
| 957 | } |
| 958 | if (parms->ac_name != NULL) { |
| 959 | size_t s; |
| 960 | char *b = malloc(parms->ac_name_len + 1, M_DEVBUF, |
| 961 | M_WAITOK); |
| 962 | if (b == NULL) |
| 963 | return ENOMEM; |
| 964 | error = copyinstr(parms->ac_name, b, |
| 965 | parms->ac_name_len+1, &s); |
| 966 | if (error != 0) { |
| 967 | free(b, M_DEVBUF); |
| 968 | return error; |
| 969 | } |
| 970 | if (s != parms->ac_name_len+1) { |
| 971 | free(b, M_DEVBUF); |
| 972 | return EINVAL; |
| 973 | } |
| 974 | if (sc->sc_concentrator_name) |
| 975 | free(sc->sc_concentrator_name, M_DEVBUF); |
| 976 | sc->sc_concentrator_name = b; |
| 977 | } |
| 978 | if (parms->service_name != NULL) { |
| 979 | size_t s; |
| 980 | char *b = malloc(parms->service_name_len + 1, M_DEVBUF, |
| 981 | M_WAITOK); |
| 982 | if (b == NULL) |
| 983 | return ENOMEM; |
| 984 | error = copyinstr(parms->service_name, b, |
| 985 | parms->service_name_len+1, &s); |
| 986 | if (error != 0) { |
| 987 | free(b, M_DEVBUF); |
| 988 | return error; |
| 989 | } |
| 990 | if (s != parms->service_name_len+1) { |
| 991 | free(b, M_DEVBUF); |
| 992 | return EINVAL; |
| 993 | } |
| 994 | if (sc->sc_service_name) |
| 995 | free(sc->sc_service_name, M_DEVBUF); |
| 996 | sc->sc_service_name = b; |
| 997 | } |
| 998 | return 0; |
| 999 | } |
| 1000 | break; |
| 1001 | case PPPOEGETPARMS: |
| 1002 | { |
| 1003 | struct pppoediscparms *parms = (struct pppoediscparms*)data; |
| 1004 | memset(parms, 0, sizeof *parms); |
| 1005 | if (sc->sc_eth_if) |
| 1006 | strlcpy(parms->ifname, sc->sc_eth_if->if_xname, |
| 1007 | sizeof(parms->ifname)); |
| 1008 | return 0; |
| 1009 | } |
| 1010 | break; |
| 1011 | case PPPOEGETSESSION: |
| 1012 | { |
| 1013 | struct pppoeconnectionstate *state = (struct pppoeconnectionstate*)data; |
| 1014 | state->state = sc->sc_state; |
| 1015 | state->session_id = sc->sc_session; |
| 1016 | state->padi_retry_no = sc->sc_padi_retried; |
| 1017 | state->padr_retry_no = sc->sc_padr_retried; |
| 1018 | return 0; |
| 1019 | } |
| 1020 | break; |
| 1021 | case SIOCSIFFLAGS: |
| 1022 | /* |
| 1023 | * Prevent running re-establishment timers overriding |
| 1024 | * administrators choice. |
| 1025 | */ |
| 1026 | if ((ifr->ifr_flags & IFF_UP) == 0 |
| 1027 | && sc->sc_state >= PPPOE_STATE_PADI_SENT |
| 1028 | && sc->sc_state < PPPOE_STATE_SESSION) { |
| 1029 | callout_stop(&sc->sc_timeout); |
| 1030 | sc->sc_state = PPPOE_STATE_INITIAL; |
| 1031 | sc->sc_padi_retried = 0; |
| 1032 | sc->sc_padr_retried = 0; |
| 1033 | memcpy(&sc->sc_dest, etherbroadcastaddr, |
| 1034 | sizeof(sc->sc_dest)); |
| 1035 | } |
| 1036 | return sppp_ioctl(ifp, cmd, data); |
| 1037 | case SIOCSIFMTU: |
| 1038 | if (ifr->ifr_mtu > (sc->sc_eth_if == NULL ? |
| 1039 | PPPOE_MAXMTU : (sc->sc_eth_if->if_mtu - PPPOE_OVERHEAD))) { |
| 1040 | return EINVAL; |
| 1041 | } |
| 1042 | /*FALLTHROUGH*/ |
| 1043 | default: |
| 1044 | return sppp_ioctl(ifp, cmd, data); |
| 1045 | } |
| 1046 | return 0; |
| 1047 | } |
| 1048 | |
| 1049 | /* |
| 1050 | * Allocate a mbuf/cluster with space to store the given data length |
| 1051 | * of payload, leaving space for prepending an ethernet header |
| 1052 | * in front. |
| 1053 | */ |
| 1054 | static struct mbuf * |
| 1055 | pppoe_get_mbuf(size_t len) |
| 1056 | { |
| 1057 | struct mbuf *m; |
| 1058 | |
| 1059 | MGETHDR(m, M_DONTWAIT, MT_DATA); |
| 1060 | if (m == NULL) |
| 1061 | return NULL; |
| 1062 | if (len + sizeof(struct ether_header) > MHLEN) { |
| 1063 | MCLGET(m, M_DONTWAIT); |
| 1064 | if ((m->m_flags & M_EXT) == 0) { |
| 1065 | m_free(m); |
| 1066 | return NULL; |
| 1067 | } |
| 1068 | } |
| 1069 | m->m_data += sizeof(struct ether_header); |
| 1070 | m->m_len = len; |
| 1071 | m->m_pkthdr.len = len; |
| 1072 | m_reset_rcvif(m); |
| 1073 | |
| 1074 | return m; |
| 1075 | } |
| 1076 | |
| 1077 | static int |
| 1078 | pppoe_send_padi(struct pppoe_softc *sc) |
| 1079 | { |
| 1080 | struct mbuf *m0; |
| 1081 | int len, l1 = 0, l2 = 0; /* XXX: gcc */ |
| 1082 | uint8_t *p; |
| 1083 | |
| 1084 | if (sc->sc_state >PPPOE_STATE_PADI_SENT) |
| 1085 | panic("pppoe_send_padi in state %d" , sc->sc_state); |
| 1086 | |
| 1087 | /* calculate length of frame (excluding ethernet header + pppoe header) */ |
| 1088 | len = 2 + 2 + 2 + 2 + sizeof sc; /* service name tag is required, host unique is send too */ |
| 1089 | if (sc->sc_service_name != NULL) { |
| 1090 | l1 = strlen(sc->sc_service_name); |
| 1091 | len += l1; |
| 1092 | } |
| 1093 | if (sc->sc_concentrator_name != NULL) { |
| 1094 | l2 = strlen(sc->sc_concentrator_name); |
| 1095 | len += 2 + 2 + l2; |
| 1096 | } |
| 1097 | if (sc->sc_sppp.pp_if.if_mtu > PPPOE_MAXMTU) { |
| 1098 | len += 2 + 2 + 2; |
| 1099 | } |
| 1100 | |
| 1101 | /* allocate a buffer */ |
| 1102 | m0 = pppoe_get_mbuf(len + PPPOE_HEADERLEN); /* header len + payload len */ |
| 1103 | if (!m0) |
| 1104 | return ENOBUFS; |
| 1105 | |
| 1106 | /* fill in pkt */ |
| 1107 | p = mtod(m0, uint8_t *); |
| 1108 | PPPOE_ADD_HEADER(p, PPPOE_CODE_PADI, 0, len); |
| 1109 | PPPOE_ADD_16(p, PPPOE_TAG_SNAME); |
| 1110 | if (sc->sc_service_name != NULL) { |
| 1111 | PPPOE_ADD_16(p, l1); |
| 1112 | memcpy(p, sc->sc_service_name, l1); |
| 1113 | p += l1; |
| 1114 | } else { |
| 1115 | PPPOE_ADD_16(p, 0); |
| 1116 | } |
| 1117 | if (sc->sc_concentrator_name != NULL) { |
| 1118 | PPPOE_ADD_16(p, PPPOE_TAG_ACNAME); |
| 1119 | PPPOE_ADD_16(p, l2); |
| 1120 | memcpy(p, sc->sc_concentrator_name, l2); |
| 1121 | p += l2; |
| 1122 | } |
| 1123 | PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE); |
| 1124 | PPPOE_ADD_16(p, sizeof(sc)); |
| 1125 | memcpy(p, &sc, sizeof sc); |
| 1126 | p += sizeof(sc); |
| 1127 | |
| 1128 | if (sc->sc_sppp.pp_if.if_mtu > PPPOE_MAXMTU) { |
| 1129 | PPPOE_ADD_16(p, PPPOE_TAG_MAX_PAYLOAD); |
| 1130 | PPPOE_ADD_16(p, 2); |
| 1131 | PPPOE_ADD_16(p, (uint16_t)sc->sc_sppp.pp_if.if_mtu); |
| 1132 | } |
| 1133 | |
| 1134 | #ifdef PPPOE_DEBUG |
| 1135 | p += sizeof sc; |
| 1136 | if (p - mtod(m0, uint8_t *) != len + PPPOE_HEADERLEN) |
| 1137 | panic("pppoe_send_padi: garbled output len, should be %ld, is %ld" , |
| 1138 | (long)(len + PPPOE_HEADERLEN), (long)(p - mtod(m0, uint8_t *))); |
| 1139 | #endif |
| 1140 | |
| 1141 | /* send pkt */ |
| 1142 | return pppoe_output(sc, m0); |
| 1143 | } |
| 1144 | |
| 1145 | static void |
| 1146 | pppoe_timeout(void *arg) |
| 1147 | { |
| 1148 | int x, retry_wait, err; |
| 1149 | struct pppoe_softc *sc = (struct pppoe_softc*)arg; |
| 1150 | |
| 1151 | #ifdef PPPOE_DEBUG |
| 1152 | printf("%s: timeout\n" , sc->sc_sppp.pp_if.if_xname); |
| 1153 | #endif |
| 1154 | |
| 1155 | switch (sc->sc_state) { |
| 1156 | case PPPOE_STATE_INITIAL: |
| 1157 | /* delayed connect from pppoe_tls() */ |
| 1158 | pppoe_connect(sc); |
| 1159 | break; |
| 1160 | case PPPOE_STATE_PADI_SENT: |
| 1161 | /* |
| 1162 | * We have two basic ways of retrying: |
| 1163 | * - Quick retry mode: try a few times in short sequence |
| 1164 | * - Slow retry mode: we already had a connection successfully |
| 1165 | * established and will try infinitely (without user |
| 1166 | * intervention) |
| 1167 | * We only enter slow retry mode if IFF_LINK1 (aka autodial) |
| 1168 | * is not set. |
| 1169 | */ |
| 1170 | |
| 1171 | /* initialize for quick retry mode */ |
| 1172 | retry_wait = PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried); |
| 1173 | |
| 1174 | x = splnet(); |
| 1175 | sc->sc_padi_retried++; |
| 1176 | if (sc->sc_padi_retried >= PPPOE_DISC_MAXPADI) { |
| 1177 | if ((sc->sc_sppp.pp_if.if_flags & IFF_LINK1) == 0) { |
| 1178 | /* slow retry mode */ |
| 1179 | retry_wait = PPPOE_SLOW_RETRY; |
| 1180 | } else { |
| 1181 | pppoe_abort_connect(sc); |
| 1182 | splx(x); |
| 1183 | return; |
| 1184 | } |
| 1185 | } |
| 1186 | if ((err = pppoe_send_padi(sc)) != 0) { |
| 1187 | sc->sc_padi_retried--; |
| 1188 | if (sc->sc_sppp.pp_if.if_flags & IFF_DEBUG) |
| 1189 | printf("%s: failed to transmit PADI, " |
| 1190 | "error=%d\n" , |
| 1191 | sc->sc_sppp.pp_if.if_xname, err); |
| 1192 | } |
| 1193 | callout_reset(&sc->sc_timeout, retry_wait, |
| 1194 | pppoe_timeout, sc); |
| 1195 | splx(x); |
| 1196 | break; |
| 1197 | |
| 1198 | case PPPOE_STATE_PADR_SENT: |
| 1199 | x = splnet(); |
| 1200 | sc->sc_padr_retried++; |
| 1201 | if (sc->sc_padr_retried >= PPPOE_DISC_MAXPADR) { |
| 1202 | memcpy(&sc->sc_dest, etherbroadcastaddr, |
| 1203 | sizeof(sc->sc_dest)); |
| 1204 | sc->sc_state = PPPOE_STATE_PADI_SENT; |
| 1205 | sc->sc_padr_retried = 0; |
| 1206 | if ((err = pppoe_send_padi(sc)) != 0) { |
| 1207 | if (sc->sc_sppp.pp_if.if_flags & IFF_DEBUG) |
| 1208 | printf("%s: failed to send PADI" |
| 1209 | ", error=%d\n" , |
| 1210 | sc->sc_sppp.pp_if.if_xname, |
| 1211 | err); |
| 1212 | } |
| 1213 | callout_reset(&sc->sc_timeout, |
| 1214 | PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried), |
| 1215 | pppoe_timeout, sc); |
| 1216 | splx(x); |
| 1217 | return; |
| 1218 | } |
| 1219 | if ((err = pppoe_send_padr(sc)) != 0) { |
| 1220 | sc->sc_padr_retried--; |
| 1221 | if (sc->sc_sppp.pp_if.if_flags & IFF_DEBUG) |
| 1222 | printf("%s: failed to send PADR, " |
| 1223 | "error=%d\n" , sc->sc_sppp.pp_if.if_xname, |
| 1224 | err); |
| 1225 | } |
| 1226 | callout_reset(&sc->sc_timeout, |
| 1227 | PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), |
| 1228 | pppoe_timeout, sc); |
| 1229 | splx(x); |
| 1230 | break; |
| 1231 | case PPPOE_STATE_CLOSING: |
| 1232 | pppoe_disconnect(sc); |
| 1233 | break; |
| 1234 | default: |
| 1235 | return; /* all done, work in peace */ |
| 1236 | } |
| 1237 | } |
| 1238 | |
| 1239 | /* Start a connection (i.e. initiate discovery phase) */ |
| 1240 | static int |
| 1241 | pppoe_connect(struct pppoe_softc *sc) |
| 1242 | { |
| 1243 | int x, err; |
| 1244 | |
| 1245 | if (sc->sc_state != PPPOE_STATE_INITIAL) |
| 1246 | return EBUSY; |
| 1247 | |
| 1248 | #ifdef PPPOE_SERVER |
| 1249 | /* wait PADI if IFF_PASSIVE */ |
| 1250 | if ((sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) |
| 1251 | return 0; |
| 1252 | #endif |
| 1253 | x = splnet(); |
| 1254 | /* save state, in case we fail to send PADI */ |
| 1255 | sc->sc_state = PPPOE_STATE_PADI_SENT; |
| 1256 | sc->sc_padr_retried = 0; |
| 1257 | err = pppoe_send_padi(sc); |
| 1258 | if (err != 0 && sc->sc_sppp.pp_if.if_flags & IFF_DEBUG) |
| 1259 | printf("%s: failed to send PADI, error=%d\n" , |
| 1260 | sc->sc_sppp.pp_if.if_xname, err); |
| 1261 | callout_reset(&sc->sc_timeout, PPPOE_DISC_TIMEOUT, pppoe_timeout, sc); |
| 1262 | splx(x); |
| 1263 | return err; |
| 1264 | } |
| 1265 | |
| 1266 | /* disconnect */ |
| 1267 | static int |
| 1268 | pppoe_disconnect(struct pppoe_softc *sc) |
| 1269 | { |
| 1270 | int err, x; |
| 1271 | |
| 1272 | x = splnet(); |
| 1273 | |
| 1274 | if (sc->sc_state < PPPOE_STATE_SESSION) |
| 1275 | err = EBUSY; |
| 1276 | else { |
| 1277 | if (sc->sc_sppp.pp_if.if_flags & IFF_DEBUG) |
| 1278 | printf("%s: disconnecting\n" , |
| 1279 | sc->sc_sppp.pp_if.if_xname); |
| 1280 | err = pppoe_send_padt(sc->sc_eth_if, sc->sc_session, (const uint8_t *)&sc->sc_dest); |
| 1281 | } |
| 1282 | |
| 1283 | /* cleanup softc */ |
| 1284 | sc->sc_state = PPPOE_STATE_INITIAL; |
| 1285 | memcpy(&sc->sc_dest, etherbroadcastaddr, sizeof(sc->sc_dest)); |
| 1286 | if (sc->sc_ac_cookie) { |
| 1287 | free(sc->sc_ac_cookie, M_DEVBUF); |
| 1288 | sc->sc_ac_cookie = NULL; |
| 1289 | } |
| 1290 | sc->sc_ac_cookie_len = 0; |
| 1291 | if (sc->sc_relay_sid) { |
| 1292 | free(sc->sc_relay_sid, M_DEVBUF); |
| 1293 | sc->sc_relay_sid = NULL; |
| 1294 | } |
| 1295 | sc->sc_relay_sid_len = 0; |
| 1296 | #ifdef PPPOE_SERVER |
| 1297 | if (sc->sc_hunique) { |
| 1298 | free(sc->sc_hunique, M_DEVBUF); |
| 1299 | sc->sc_hunique = NULL; |
| 1300 | } |
| 1301 | sc->sc_hunique_len = 0; |
| 1302 | #endif |
| 1303 | sc->sc_session = 0; |
| 1304 | |
| 1305 | /* notify upper layer */ |
| 1306 | sc->sc_sppp.pp_down(&sc->sc_sppp); |
| 1307 | |
| 1308 | splx(x); |
| 1309 | |
| 1310 | return err; |
| 1311 | } |
| 1312 | |
| 1313 | /* Connection attempt aborted */ |
| 1314 | static void |
| 1315 | pppoe_abort_connect(struct pppoe_softc *sc) |
| 1316 | { |
| 1317 | printf("%s: could not establish connection\n" , |
| 1318 | sc->sc_sppp.pp_if.if_xname); |
| 1319 | sc->sc_state = PPPOE_STATE_CLOSING; |
| 1320 | |
| 1321 | /* notify upper layer */ |
| 1322 | sc->sc_sppp.pp_down(&sc->sc_sppp); |
| 1323 | |
| 1324 | /* clear connection state */ |
| 1325 | memcpy(&sc->sc_dest, etherbroadcastaddr, sizeof(sc->sc_dest)); |
| 1326 | sc->sc_state = PPPOE_STATE_INITIAL; |
| 1327 | } |
| 1328 | |
| 1329 | /* Send a PADR packet */ |
| 1330 | static int |
| 1331 | pppoe_send_padr(struct pppoe_softc *sc) |
| 1332 | { |
| 1333 | struct mbuf *m0; |
| 1334 | uint8_t *p; |
| 1335 | size_t len, l1 = 0; /* XXX: gcc */ |
| 1336 | |
| 1337 | if (sc->sc_state != PPPOE_STATE_PADR_SENT) |
| 1338 | return EIO; |
| 1339 | |
| 1340 | len = 2 + 2 + 2 + 2 + sizeof(sc); /* service name, host unique */ |
| 1341 | if (sc->sc_service_name != NULL) { /* service name tag maybe empty */ |
| 1342 | l1 = strlen(sc->sc_service_name); |
| 1343 | len += l1; |
| 1344 | } |
| 1345 | if (sc->sc_ac_cookie_len > 0) |
| 1346 | len += 2 + 2 + sc->sc_ac_cookie_len; /* AC cookie */ |
| 1347 | if (sc->sc_relay_sid_len > 0) |
| 1348 | len += 2 + 2 + sc->sc_relay_sid_len; /* Relay SID */ |
| 1349 | if (sc->sc_sppp.pp_if.if_mtu > PPPOE_MAXMTU) { |
| 1350 | len += 2 + 2 + 2; |
| 1351 | } |
| 1352 | m0 = pppoe_get_mbuf(len + PPPOE_HEADERLEN); |
| 1353 | if (!m0) |
| 1354 | return ENOBUFS; |
| 1355 | p = mtod(m0, uint8_t *); |
| 1356 | PPPOE_ADD_HEADER(p, PPPOE_CODE_PADR, 0, len); |
| 1357 | PPPOE_ADD_16(p, PPPOE_TAG_SNAME); |
| 1358 | if (sc->sc_service_name != NULL) { |
| 1359 | PPPOE_ADD_16(p, l1); |
| 1360 | memcpy(p, sc->sc_service_name, l1); |
| 1361 | p += l1; |
| 1362 | } else { |
| 1363 | PPPOE_ADD_16(p, 0); |
| 1364 | } |
| 1365 | if (sc->sc_ac_cookie_len > 0) { |
| 1366 | PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE); |
| 1367 | PPPOE_ADD_16(p, sc->sc_ac_cookie_len); |
| 1368 | memcpy(p, sc->sc_ac_cookie, sc->sc_ac_cookie_len); |
| 1369 | p += sc->sc_ac_cookie_len; |
| 1370 | } |
| 1371 | if (sc->sc_relay_sid_len > 0) { |
| 1372 | PPPOE_ADD_16(p, PPPOE_TAG_RELAYSID); |
| 1373 | PPPOE_ADD_16(p, sc->sc_relay_sid_len); |
| 1374 | memcpy(p, sc->sc_relay_sid, sc->sc_relay_sid_len); |
| 1375 | p += sc->sc_relay_sid_len; |
| 1376 | } |
| 1377 | PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE); |
| 1378 | PPPOE_ADD_16(p, sizeof(sc)); |
| 1379 | memcpy(p, &sc, sizeof sc); |
| 1380 | p += sizeof(sc); |
| 1381 | |
| 1382 | if (sc->sc_sppp.pp_if.if_mtu > PPPOE_MAXMTU) { |
| 1383 | PPPOE_ADD_16(p, PPPOE_TAG_MAX_PAYLOAD); |
| 1384 | PPPOE_ADD_16(p, 2); |
| 1385 | PPPOE_ADD_16(p, (uint16_t)sc->sc_sppp.pp_if.if_mtu); |
| 1386 | } |
| 1387 | |
| 1388 | #ifdef PPPOE_DEBUG |
| 1389 | p += sizeof sc; |
| 1390 | if (p - mtod(m0, uint8_t *) != len + PPPOE_HEADERLEN) |
| 1391 | panic("pppoe_send_padr: garbled output len, should be %ld, is %ld" , |
| 1392 | (long)(len + PPPOE_HEADERLEN), (long)(p - mtod(m0, uint8_t *))); |
| 1393 | #endif |
| 1394 | |
| 1395 | return pppoe_output(sc, m0); |
| 1396 | } |
| 1397 | |
| 1398 | /* send a PADT packet */ |
| 1399 | static int |
| 1400 | pppoe_send_padt(struct ifnet *outgoing_if, u_int session, const uint8_t *dest) |
| 1401 | { |
| 1402 | struct ether_header *eh; |
| 1403 | struct sockaddr dst; |
| 1404 | struct mbuf *m0; |
| 1405 | uint8_t *p; |
| 1406 | |
| 1407 | m0 = pppoe_get_mbuf(PPPOE_HEADERLEN); |
| 1408 | if (!m0) |
| 1409 | return EIO; |
| 1410 | p = mtod(m0, uint8_t *); |
| 1411 | PPPOE_ADD_HEADER(p, PPPOE_CODE_PADT, session, 0); |
| 1412 | |
| 1413 | memset(&dst, 0, sizeof dst); |
| 1414 | dst.sa_family = AF_UNSPEC; |
| 1415 | eh = (struct ether_header*)&dst.sa_data; |
| 1416 | eh->ether_type = htons(ETHERTYPE_PPPOEDISC); |
| 1417 | memcpy(&eh->ether_dhost, dest, ETHER_ADDR_LEN); |
| 1418 | |
| 1419 | m0->m_flags &= ~(M_BCAST|M_MCAST); |
| 1420 | return if_output_lock(outgoing_if, outgoing_if, m0, &dst, NULL); |
| 1421 | } |
| 1422 | |
| 1423 | #ifdef PPPOE_SERVER |
| 1424 | static int |
| 1425 | pppoe_send_pado(struct pppoe_softc *sc) |
| 1426 | { |
| 1427 | struct mbuf *m0; |
| 1428 | uint8_t *p; |
| 1429 | size_t len; |
| 1430 | |
| 1431 | if (sc->sc_state != PPPOE_STATE_PADO_SENT) |
| 1432 | return EIO; |
| 1433 | |
| 1434 | /* calc length */ |
| 1435 | len = 0; |
| 1436 | /* include ac_cookie */ |
| 1437 | len += 2 + 2 + sizeof(sc); |
| 1438 | /* include hunique */ |
| 1439 | len += 2 + 2 + sc->sc_hunique_len; |
| 1440 | m0 = pppoe_get_mbuf(len + PPPOE_HEADERLEN); |
| 1441 | if (!m0) |
| 1442 | return EIO; |
| 1443 | p = mtod(m0, uint8_t *); |
| 1444 | PPPOE_ADD_HEADER(p, PPPOE_CODE_PADO, 0, len); |
| 1445 | PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE); |
| 1446 | PPPOE_ADD_16(p, sizeof(sc)); |
| 1447 | memcpy(p, &sc, sizeof(sc)); |
| 1448 | p += sizeof(sc); |
| 1449 | PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE); |
| 1450 | PPPOE_ADD_16(p, sc->sc_hunique_len); |
| 1451 | memcpy(p, sc->sc_hunique, sc->sc_hunique_len); |
| 1452 | return pppoe_output(sc, m0); |
| 1453 | } |
| 1454 | |
| 1455 | static int |
| 1456 | pppoe_send_pads(struct pppoe_softc *sc) |
| 1457 | { |
| 1458 | struct bintime bt; |
| 1459 | struct mbuf *m0; |
| 1460 | uint8_t *p; |
| 1461 | size_t len, l1 = 0; /* XXX: gcc */ |
| 1462 | |
| 1463 | if (sc->sc_state != PPPOE_STATE_PADO_SENT) |
| 1464 | return EIO; |
| 1465 | |
| 1466 | getbinuptime(&bt); |
| 1467 | sc->sc_session = bt.sec % 0xff + 1; |
| 1468 | /* calc length */ |
| 1469 | len = 0; |
| 1470 | /* include hunique */ |
| 1471 | len += 2 + 2 + 2 + 2 + sc->sc_hunique_len; /* service name, host unique*/ |
| 1472 | if (sc->sc_service_name != NULL) { /* service name tag maybe empty */ |
| 1473 | l1 = strlen(sc->sc_service_name); |
| 1474 | len += l1; |
| 1475 | } |
| 1476 | m0 = pppoe_get_mbuf(len + PPPOE_HEADERLEN); |
| 1477 | if (!m0) |
| 1478 | return ENOBUFS; |
| 1479 | p = mtod(m0, uint8_t *); |
| 1480 | PPPOE_ADD_HEADER(p, PPPOE_CODE_PADS, sc->sc_session, len); |
| 1481 | PPPOE_ADD_16(p, PPPOE_TAG_SNAME); |
| 1482 | if (sc->sc_service_name != NULL) { |
| 1483 | PPPOE_ADD_16(p, l1); |
| 1484 | memcpy(p, sc->sc_service_name, l1); |
| 1485 | p += l1; |
| 1486 | } else { |
| 1487 | PPPOE_ADD_16(p, 0); |
| 1488 | } |
| 1489 | PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE); |
| 1490 | PPPOE_ADD_16(p, sc->sc_hunique_len); |
| 1491 | memcpy(p, sc->sc_hunique, sc->sc_hunique_len); |
| 1492 | return pppoe_output(sc, m0); |
| 1493 | } |
| 1494 | #endif |
| 1495 | |
| 1496 | static void |
| 1497 | pppoe_tls(struct sppp *sp) |
| 1498 | { |
| 1499 | struct pppoe_softc *sc = (void *)sp; |
| 1500 | int wtime; |
| 1501 | |
| 1502 | if (sc->sc_state != PPPOE_STATE_INITIAL) |
| 1503 | return; |
| 1504 | |
| 1505 | if (sc->sc_sppp.pp_phase == SPPP_PHASE_ESTABLISH && |
| 1506 | sc->sc_sppp.pp_auth_failures > 0) { |
| 1507 | /* |
| 1508 | * Delay trying to reconnect a bit more - the peer |
| 1509 | * might have failed to contact its radius server. |
| 1510 | */ |
| 1511 | wtime = PPPOE_RECON_FAST * sc->sc_sppp.pp_auth_failures; |
| 1512 | if (wtime > PPPOE_SLOW_RETRY) |
| 1513 | wtime = PPPOE_SLOW_RETRY; |
| 1514 | } else { |
| 1515 | wtime = PPPOE_RECON_IMMEDIATE; |
| 1516 | } |
| 1517 | callout_reset(&sc->sc_timeout, wtime, pppoe_timeout, sc); |
| 1518 | } |
| 1519 | |
| 1520 | static void |
| 1521 | pppoe_tlf(struct sppp *sp) |
| 1522 | { |
| 1523 | struct pppoe_softc *sc = (void *)sp; |
| 1524 | if (sc->sc_state < PPPOE_STATE_SESSION) |
| 1525 | return; |
| 1526 | /* |
| 1527 | * Do not call pppoe_disconnect here, the upper layer state |
| 1528 | * machine gets confused by this. We must return from this |
| 1529 | * function and defer disconnecting to the timeout handler. |
| 1530 | */ |
| 1531 | sc->sc_state = PPPOE_STATE_CLOSING; |
| 1532 | callout_reset(&sc->sc_timeout, hz/50, pppoe_timeout, sc); |
| 1533 | } |
| 1534 | |
| 1535 | static void |
| 1536 | pppoe_start(struct ifnet *ifp) |
| 1537 | { |
| 1538 | struct pppoe_softc *sc = (void *)ifp; |
| 1539 | struct mbuf *m; |
| 1540 | uint8_t *p; |
| 1541 | size_t len; |
| 1542 | |
| 1543 | if (sppp_isempty(ifp)) |
| 1544 | return; |
| 1545 | |
| 1546 | /* are we ready to process data yet? */ |
| 1547 | if (sc->sc_state < PPPOE_STATE_SESSION) { |
| 1548 | sppp_flush(&sc->sc_sppp.pp_if); |
| 1549 | return; |
| 1550 | } |
| 1551 | |
| 1552 | while ((m = sppp_dequeue(ifp)) != NULL) { |
| 1553 | len = m->m_pkthdr.len; |
| 1554 | M_PREPEND(m, PPPOE_HEADERLEN, M_DONTWAIT); |
| 1555 | if (m == NULL) { |
| 1556 | ifp->if_oerrors++; |
| 1557 | continue; |
| 1558 | } |
| 1559 | p = mtod(m, uint8_t *); |
| 1560 | PPPOE_ADD_HEADER(p, 0, sc->sc_session, len); |
| 1561 | |
| 1562 | bpf_mtap(&sc->sc_sppp.pp_if, m); |
| 1563 | |
| 1564 | pppoe_output(sc, m); |
| 1565 | } |
| 1566 | } |
| 1567 | |
| 1568 | |
| 1569 | static int |
| 1570 | pppoe_ifattach_hook(void *arg, struct mbuf **mp, struct ifnet *ifp, int dir) |
| 1571 | { |
| 1572 | struct pppoe_softc *sc; |
| 1573 | int s; |
| 1574 | |
| 1575 | if (mp != (struct mbuf **)PFIL_IFNET_DETACH) |
| 1576 | return 0; |
| 1577 | |
| 1578 | s = splnet(); |
| 1579 | LIST_FOREACH(sc, &pppoe_softc_list, sc_list) { |
| 1580 | if (sc->sc_eth_if != ifp) |
| 1581 | continue; |
| 1582 | if (sc->sc_sppp.pp_if.if_flags & IFF_UP) { |
| 1583 | sc->sc_sppp.pp_if.if_flags &= ~(IFF_UP|IFF_RUNNING); |
| 1584 | printf("%s: ethernet interface detached, going down\n" , |
| 1585 | sc->sc_sppp.pp_if.if_xname); |
| 1586 | } |
| 1587 | sc->sc_eth_if = NULL; |
| 1588 | pppoe_clear_softc(sc, "ethernet interface detached" ); |
| 1589 | } |
| 1590 | splx(s); |
| 1591 | |
| 1592 | return 0; |
| 1593 | } |
| 1594 | |
| 1595 | static void |
| 1596 | pppoe_clear_softc(struct pppoe_softc *sc, const char *message) |
| 1597 | { |
| 1598 | /* stop timer */ |
| 1599 | callout_stop(&sc->sc_timeout); |
| 1600 | if (sc->sc_sppp.pp_if.if_flags & IFF_DEBUG) |
| 1601 | printf("%s: session 0x%x terminated, %s\n" , |
| 1602 | sc->sc_sppp.pp_if.if_xname, sc->sc_session, message); |
| 1603 | |
| 1604 | /* fix our state */ |
| 1605 | sc->sc_state = PPPOE_STATE_INITIAL; |
| 1606 | |
| 1607 | /* signal upper layer */ |
| 1608 | sc->sc_sppp.pp_down(&sc->sc_sppp); |
| 1609 | |
| 1610 | /* clean up softc */ |
| 1611 | memcpy(&sc->sc_dest, etherbroadcastaddr, sizeof(sc->sc_dest)); |
| 1612 | if (sc->sc_ac_cookie) { |
| 1613 | free(sc->sc_ac_cookie, M_DEVBUF); |
| 1614 | sc->sc_ac_cookie = NULL; |
| 1615 | } |
| 1616 | if (sc->sc_relay_sid) { |
| 1617 | free(sc->sc_relay_sid, M_DEVBUF); |
| 1618 | sc->sc_relay_sid = NULL; |
| 1619 | } |
| 1620 | sc->sc_ac_cookie_len = 0; |
| 1621 | sc->sc_session = 0; |
| 1622 | } |
| 1623 | |
| 1624 | static void |
| 1625 | pppoe_enqueue(struct ifqueue *inq, struct mbuf *m) |
| 1626 | { |
| 1627 | if (m->m_flags & M_PROMISC) { |
| 1628 | m_free(m); |
| 1629 | return; |
| 1630 | } |
| 1631 | |
| 1632 | #ifndef PPPOE_SERVER |
| 1633 | if (m->m_flags & (M_MCAST | M_BCAST)) { |
| 1634 | m_free(m); |
| 1635 | return; |
| 1636 | } |
| 1637 | #endif |
| 1638 | |
| 1639 | IFQ_LOCK(inq); |
| 1640 | if (IF_QFULL(inq)) { |
| 1641 | IF_DROP(inq); |
| 1642 | IFQ_UNLOCK(inq); |
| 1643 | m_freem(m); |
| 1644 | } else { |
| 1645 | IF_ENQUEUE(inq, m); |
| 1646 | IFQ_UNLOCK(inq); |
| 1647 | softint_schedule(pppoe_softintr); |
| 1648 | } |
| 1649 | return; |
| 1650 | } |
| 1651 | |
| 1652 | void |
| 1653 | pppoe_input(struct ifnet *ifp, struct mbuf *m) |
| 1654 | { |
| 1655 | pppoe_enqueue(&ppoeinq, m); |
| 1656 | return; |
| 1657 | } |
| 1658 | |
| 1659 | void |
| 1660 | pppoedisc_input(struct ifnet *ifp, struct mbuf *m) |
| 1661 | { |
| 1662 | pppoe_enqueue(&ppoediscinq, m); |
| 1663 | return; |
| 1664 | } |
| 1665 | |
| 1666 | static void |
| 1667 | sysctl_net_pppoe_setup(struct sysctllog **clog) |
| 1668 | { |
| 1669 | const struct sysctlnode *node = NULL; |
| 1670 | |
| 1671 | sysctl_createv(clog, 0, NULL, &node, |
| 1672 | CTLFLAG_PERMANENT, |
| 1673 | CTLTYPE_NODE, "pppoe" , |
| 1674 | SYSCTL_DESCR("PPPOE protocol" ), |
| 1675 | NULL, 0, NULL, 0, |
| 1676 | CTL_NET, CTL_CREATE, CTL_EOL); |
| 1677 | |
| 1678 | if (node == NULL) |
| 1679 | return; |
| 1680 | |
| 1681 | sysctl_createv(clog, 0, &node, NULL, |
| 1682 | CTLFLAG_PERMANENT | CTLFLAG_READONLY, |
| 1683 | CTLTYPE_BOOL, "term_unknown" , |
| 1684 | SYSCTL_DESCR("Terminate unknown sessions" ), |
| 1685 | NULL, 0, &pppoe_term_unknown, sizeof(pppoe_term_unknown), |
| 1686 | CTL_CREATE, CTL_EOL); |
| 1687 | } |
| 1688 | |
| 1689 | /* |
| 1690 | * Module infrastructure |
| 1691 | */ |
| 1692 | #include "if_module.h" |
| 1693 | |
| 1694 | IF_MODULE(MODULE_CLASS_DRIVER, pppoe, "sppp_subr" ) |
| 1695 | |