1 /* 2 * ng_pppoe.c 3 */ 4 5 /*- 6 * Copyright (c) 1996-1999 Whistle Communications, Inc. 7 * All rights reserved. 8 * 9 * Subject to the following obligations and disclaimer of warranty, use and 10 * redistribution of this software, in source or object code forms, with or 11 * without modifications are expressly permitted by Whistle Communications; 12 * provided, however, that: 13 * 1. Any and all reproductions of the source or object code must include the 14 * copyright notice above and the following disclaimer of warranties; and 15 * 2. No rights are granted, in any manner or form, to use Whistle 16 * Communications, Inc. trademarks, including the mark "WHISTLE 17 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as 18 * such appears in the above copyright notice or in the software. 19 * 20 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND 21 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO 22 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, 23 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF 24 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. 25 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY 26 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS 27 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. 28 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES 29 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 30 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 31 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 32 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 35 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY 36 * OF SUCH DAMAGE. 37 * 38 * Author: Julian Elischer <julian@freebsd.org> 39 * 40 * $FreeBSD$ 41 * $Whistle: ng_pppoe.c,v 1.10 1999/11/01 09:24:52 julian Exp $ 42 */ 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/ktr.h> 48 #include <sys/mbuf.h> 49 #include <sys/malloc.h> 50 #include <sys/errno.h> 51 #include <sys/syslog.h> 52 #include <net/ethernet.h> 53 54 #include <netgraph/ng_message.h> 55 #include <netgraph/netgraph.h> 56 #include <netgraph/ng_parse.h> 57 #include <netgraph/ng_pppoe.h> 58 #include <netgraph/ng_ether.h> 59 60 #ifdef NG_SEPARATE_MALLOC 61 MALLOC_DEFINE(M_NETGRAPH_PPPOE, "netgraph_pppoe", "netgraph pppoe node"); 62 #else 63 #define M_NETGRAPH_PPPOE M_NETGRAPH 64 #endif 65 66 #define SIGNOFF "session closed" 67 68 /* 69 * This section contains the netgraph method declarations for the 70 * pppoe node. These methods define the netgraph pppoe 'type'. 71 */ 72 73 static ng_constructor_t ng_pppoe_constructor; 74 static ng_rcvmsg_t ng_pppoe_rcvmsg; 75 static ng_shutdown_t ng_pppoe_shutdown; 76 static ng_newhook_t ng_pppoe_newhook; 77 static ng_connect_t ng_pppoe_connect; 78 static ng_rcvdata_t ng_pppoe_rcvdata; 79 static ng_rcvdata_t ng_pppoe_rcvdata_ether; 80 static ng_rcvdata_t ng_pppoe_rcvdata_debug; 81 static ng_disconnect_t ng_pppoe_disconnect; 82 83 /* Parse type for struct ngpppoe_init_data */ 84 static const struct ng_parse_struct_field ngpppoe_init_data_type_fields[] 85 = NG_PPPOE_INIT_DATA_TYPE_INFO; 86 static const struct ng_parse_type ngpppoe_init_data_state_type = { 87 &ng_parse_struct_type, 88 &ngpppoe_init_data_type_fields 89 }; 90 91 /* Parse type for struct ngpppoe_sts */ 92 static const struct ng_parse_struct_field ng_pppoe_sts_type_fields[] 93 = NG_PPPOE_STS_TYPE_INFO; 94 static const struct ng_parse_type ng_pppoe_sts_state_type = { 95 &ng_parse_struct_type, 96 &ng_pppoe_sts_type_fields 97 }; 98 99 /* List of commands and how to convert arguments to/from ASCII */ 100 static const struct ng_cmdlist ng_pppoe_cmds[] = { 101 { 102 NGM_PPPOE_COOKIE, 103 NGM_PPPOE_CONNECT, 104 "pppoe_connect", 105 &ngpppoe_init_data_state_type, 106 NULL 107 }, 108 { 109 NGM_PPPOE_COOKIE, 110 NGM_PPPOE_LISTEN, 111 "pppoe_listen", 112 &ngpppoe_init_data_state_type, 113 NULL 114 }, 115 { 116 NGM_PPPOE_COOKIE, 117 NGM_PPPOE_OFFER, 118 "pppoe_offer", 119 &ngpppoe_init_data_state_type, 120 NULL 121 }, 122 { 123 NGM_PPPOE_COOKIE, 124 NGM_PPPOE_SERVICE, 125 "pppoe_service", 126 &ngpppoe_init_data_state_type, 127 NULL 128 }, 129 { 130 NGM_PPPOE_COOKIE, 131 NGM_PPPOE_SUCCESS, 132 "pppoe_success", 133 &ng_pppoe_sts_state_type, 134 NULL 135 }, 136 { 137 NGM_PPPOE_COOKIE, 138 NGM_PPPOE_FAIL, 139 "pppoe_fail", 140 &ng_pppoe_sts_state_type, 141 NULL 142 }, 143 { 144 NGM_PPPOE_COOKIE, 145 NGM_PPPOE_CLOSE, 146 "pppoe_close", 147 &ng_pppoe_sts_state_type, 148 NULL 149 }, 150 { 151 NGM_PPPOE_COOKIE, 152 NGM_PPPOE_SETMODE, 153 "pppoe_setmode", 154 &ng_parse_string_type, 155 NULL 156 }, 157 { 158 NGM_PPPOE_COOKIE, 159 NGM_PPPOE_GETMODE, 160 "pppoe_getmode", 161 NULL, 162 &ng_parse_string_type 163 }, 164 { 165 NGM_PPPOE_COOKIE, 166 NGM_PPPOE_SETENADDR, 167 "setenaddr", 168 &ng_parse_enaddr_type, 169 NULL 170 }, 171 { 0 } 172 }; 173 174 /* Netgraph node type descriptor */ 175 static struct ng_type typestruct = { 176 .version = NG_ABI_VERSION, 177 .name = NG_PPPOE_NODE_TYPE, 178 .constructor = ng_pppoe_constructor, 179 .rcvmsg = ng_pppoe_rcvmsg, 180 .shutdown = ng_pppoe_shutdown, 181 .newhook = ng_pppoe_newhook, 182 .connect = ng_pppoe_connect, 183 .rcvdata = ng_pppoe_rcvdata, 184 .disconnect = ng_pppoe_disconnect, 185 .cmdlist = ng_pppoe_cmds, 186 }; 187 NETGRAPH_INIT(pppoe, &typestruct); 188 189 /* 190 * States for the session state machine. 191 * These have no meaning if there is no hook attached yet. 192 */ 193 enum state { 194 PPPOE_SNONE=0, /* [both] Initial state */ 195 PPPOE_LISTENING, /* [Daemon] Listening for discover initiation pkt */ 196 PPPOE_SINIT, /* [Client] Sent discovery initiation */ 197 PPPOE_PRIMED, /* [Server] Awaiting PADI from daemon */ 198 PPPOE_SOFFER, /* [Server] Sent offer message (got PADI)*/ 199 PPPOE_SREQ, /* [Client] Sent a Request */ 200 PPPOE_NEWCONNECTED, /* [Server] Connection established, No data received */ 201 PPPOE_CONNECTED, /* [Both] Connection established, Data received */ 202 PPPOE_DEAD /* [Both] */ 203 }; 204 205 #define NUMTAGS 20 /* number of tags we are set up to work with */ 206 207 /* 208 * Information we store for each hook on each node for negotiating the 209 * session. The mbuf and cluster are freed once negotiation has completed. 210 * The whole negotiation block is then discarded. 211 */ 212 213 struct sess_neg { 214 struct mbuf *m; /* holds cluster with last sent packet */ 215 union packet *pkt; /* points within the above cluster */ 216 struct callout handle; /* see timeout(9) */ 217 u_int timeout; /* 0,1,2,4,8,16 etc. seconds */ 218 u_int numtags; 219 const struct pppoe_tag *tags[NUMTAGS]; 220 u_int service_len; 221 u_int ac_name_len; 222 223 struct datatag service; 224 struct datatag ac_name; 225 }; 226 typedef struct sess_neg *negp; 227 228 /* 229 * Session information that is needed after connection. 230 */ 231 struct sess_con { 232 hook_p hook; 233 uint16_t Session_ID; 234 enum state state; 235 ng_ID_t creator; /* who to notify */ 236 struct pppoe_full_hdr pkt_hdr; /* used when connected */ 237 negp neg; /* used when negotiating */ 238 TAILQ_ENTRY(sess_con) sessions; 239 }; 240 typedef struct sess_con *sessp; 241 242 #define SESSHASHSIZE 0x0100 243 #define SESSHASH(x) (((x) ^ ((x) >> 8)) & (SESSHASHSIZE - 1)) 244 245 struct sess_hash_entry { 246 struct mtx mtx; 247 TAILQ_HEAD(hhead, sess_con) head; 248 }; 249 250 /* 251 * Information we store for each node 252 */ 253 struct PPPoE { 254 node_p node; /* back pointer to node */ 255 hook_p ethernet_hook; 256 hook_p debug_hook; 257 u_int packets_in; /* packets in from ethernet */ 258 u_int packets_out; /* packets out towards ethernet */ 259 uint32_t flags; 260 #define COMPAT_3COM 0x00000001 261 #define COMPAT_DLINK 0x00000002 262 struct ether_header eh; 263 struct sess_hash_entry sesshash[SESSHASHSIZE]; 264 }; 265 typedef struct PPPoE *priv_p; 266 267 union uniq { 268 char bytes[sizeof(void *)]; 269 void *pointer; 270 }; 271 272 #define LEAVE(x) do { error = x; goto quit; } while(0) 273 static void pppoe_start(sessp sp); 274 static void pppoe_ticker(node_p node, hook_p hook, void *arg1, int arg2); 275 static const struct pppoe_tag *scan_tags(sessp sp, 276 const struct pppoe_hdr* ph); 277 static int pppoe_send_event(sessp sp, enum cmd cmdid); 278 279 /************************************************************************* 280 * Some basic utilities from the Linux version with author's permission.* 281 * Author: Michal Ostrowski <mostrows@styx.uwaterloo.ca> * 282 ************************************************************************/ 283 284 /* 285 * Generate a new session id 286 * XXX find out the FreeBSD locking scheme. 287 */ 288 static uint16_t 289 get_new_sid(node_p node) 290 { 291 static int pppoe_sid = 10; 292 hook_p hook; 293 uint16_t val; 294 295 restart: 296 val = pppoe_sid++; 297 /* 298 * Spec says 0xFFFF is reserved. 299 * Also don't use 0x0000 300 */ 301 if (val == 0xffff) { 302 pppoe_sid = 20; 303 goto restart; 304 } 305 306 /* Check it isn't already in use. */ 307 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) { 308 sessp sp = NG_HOOK_PRIVATE(hook); 309 310 /* Skip any nonsession hook. */ 311 if (sp == NULL) 312 continue; 313 if (sp->Session_ID == val) 314 goto restart; 315 } 316 317 CTR2(KTR_NET, "%20s: new sid %d", __func__, val); 318 319 return (val); 320 } 321 322 323 /* 324 * Return the location where the next tag can be put 325 */ 326 static __inline const struct pppoe_tag* 327 next_tag(const struct pppoe_hdr* ph) 328 { 329 return (const struct pppoe_tag*)(((const char*)&ph->tag[0]) 330 + ntohs(ph->length)); 331 } 332 333 /* 334 * Look for a tag of a specific type. 335 * Don't trust any length the other end says, 336 * but assume we already sanity checked ph->length. 337 */ 338 static const struct pppoe_tag* 339 get_tag(const struct pppoe_hdr* ph, uint16_t idx) 340 { 341 const char *const end = (const char *)next_tag(ph); 342 const struct pppoe_tag *pt = &ph->tag[0]; 343 const char *ptn; 344 345 /* 346 * Keep processing tags while a tag header will still fit. 347 */ 348 while((const char*)(pt + 1) <= end) { 349 /* 350 * If the tag data would go past the end of the packet, abort. 351 */ 352 ptn = (((const char *)(pt + 1)) + ntohs(pt->tag_len)); 353 if (ptn > end) { 354 CTR2(KTR_NET, "%20s: invalid length for tag %d", 355 __func__, idx); 356 return (NULL); 357 } 358 if (pt->tag_type == idx) { 359 CTR2(KTR_NET, "%20s: found tag %d", __func__, idx); 360 return (pt); 361 } 362 363 pt = (const struct pppoe_tag*)ptn; 364 } 365 366 CTR2(KTR_NET, "%20s: not found tag %d", __func__, idx); 367 return (NULL); 368 } 369 370 /************************************************************************** 371 * Inlines to initialise or add tags to a session's tag list. 372 **************************************************************************/ 373 /* 374 * Initialise the session's tag list. 375 */ 376 static void 377 init_tags(sessp sp) 378 { 379 KASSERT(sp->neg != NULL, ("%s: no neg", __func__)); 380 sp->neg->numtags = 0; 381 } 382 383 static void 384 insert_tag(sessp sp, const struct pppoe_tag *tp) 385 { 386 negp neg = sp->neg; 387 int i; 388 389 KASSERT(neg != NULL, ("%s: no neg", __func__)); 390 if ((i = neg->numtags++) < NUMTAGS) { 391 neg->tags[i] = tp; 392 } else { 393 log(LOG_NOTICE, "ng_pppoe: asked to add too many tags to " 394 "packet\n"); 395 neg->numtags--; 396 } 397 } 398 399 /* 400 * Make up a packet, using the tags filled out for the session. 401 * 402 * Assume that the actual pppoe header and ethernet header 403 * are filled out externally to this routine. 404 * Also assume that neg->wh points to the correct 405 * location at the front of the buffer space. 406 */ 407 static void 408 make_packet(sessp sp) { 409 struct pppoe_full_hdr *wh = &sp->neg->pkt->pkt_header; 410 const struct pppoe_tag **tag; 411 char *dp; 412 int count; 413 int tlen; 414 uint16_t length = 0; 415 416 KASSERT((sp->neg != NULL) && (sp->neg->m != NULL), 417 ("%s: called from wrong state", __func__)); 418 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID); 419 420 dp = (char *)wh->ph.tag; 421 for (count = 0, tag = sp->neg->tags; 422 ((count < sp->neg->numtags) && (count < NUMTAGS)); 423 tag++, count++) { 424 tlen = ntohs((*tag)->tag_len) + sizeof(**tag); 425 if ((length + tlen) > (ETHER_MAX_LEN - 4 - sizeof(*wh))) { 426 log(LOG_NOTICE, "ng_pppoe: tags too long\n"); 427 sp->neg->numtags = count; 428 break; /* XXX chop off what's too long */ 429 } 430 bcopy(*tag, (char *)dp, tlen); 431 length += tlen; 432 dp += tlen; 433 } 434 wh->ph.length = htons(length); 435 sp->neg->m->m_len = length + sizeof(*wh); 436 sp->neg->m->m_pkthdr.len = length + sizeof(*wh); 437 } 438 439 /************************************************************************** 440 * Routines to match a service. * 441 **************************************************************************/ 442 443 /* 444 * Find a hook that has a service string that matches that 445 * we are seeking. For now use a simple string. 446 * In the future we may need something like regexp(). 447 * 448 * Null string is a wildcard (ANY service), according to RFC2516. 449 * And historical FreeBSD wildcard is also "*". 450 */ 451 452 static hook_p 453 pppoe_match_svc(node_p node, const struct pppoe_tag *tag) 454 { 455 hook_p hook; 456 457 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) { 458 sessp sp = NG_HOOK_PRIVATE(hook); 459 negp neg; 460 461 /* Skip any nonsession hook. */ 462 if (sp == NULL) 463 continue; 464 465 /* Skip any sessions which are not in LISTEN mode. */ 466 if (sp->state != PPPOE_LISTENING) 467 continue; 468 469 neg = sp->neg; 470 471 /* Empty Service-Name matches any service. */ 472 if (neg->service_len == 0) 473 break; 474 475 /* Special case for a blank or "*" service name (wildcard). */ 476 if (neg->service_len == 1 && neg->service.data[0] == '*') 477 break; 478 479 /* If the lengths don't match, that aint it. */ 480 if (neg->service_len != ntohs(tag->tag_len)) 481 continue; 482 483 if (strncmp(tag->tag_data, neg->service.data, 484 ntohs(tag->tag_len)) == 0) 485 break; 486 } 487 CTR3(KTR_NET, "%20s: matched %p for %s", __func__, hook, tag->tag_data); 488 489 return (hook); 490 } 491 492 /* 493 * Broadcast the PADI packet in m0 to all listening hooks. 494 * This routine is called when a PADI with empty Service-Name 495 * tag is received. Client should receive PADOs with all 496 * available services. 497 */ 498 static int 499 pppoe_broadcast_padi(node_p node, struct mbuf *m0) 500 { 501 hook_p hook; 502 int error = 0; 503 504 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) { 505 sessp sp = NG_HOOK_PRIVATE(hook); 506 struct mbuf *m; 507 508 /* 509 * Go through all listening hooks and 510 * broadcast the PADI packet up there 511 */ 512 if (sp == NULL) 513 continue; 514 515 if (sp->state != PPPOE_LISTENING) 516 continue; 517 518 m = m_dup(m0, M_DONTWAIT); 519 if (m == NULL) 520 return (ENOMEM); 521 NG_SEND_DATA_ONLY(error, hook, m); 522 if (error) 523 return (error); 524 } 525 526 return (0); 527 } 528 529 /* 530 * Find a hook, which name equals to given service. 531 */ 532 static hook_p 533 pppoe_find_svc(node_p node, const char *svc_name, int svc_len) 534 { 535 hook_p hook; 536 537 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) { 538 sessp sp = NG_HOOK_PRIVATE(hook); 539 negp neg; 540 541 /* Skip any nonsession hook. */ 542 if (sp == NULL) 543 continue; 544 545 /* Skip any sessions which are not in LISTEN mode. */ 546 if (sp->state != PPPOE_LISTENING) 547 continue; 548 549 neg = sp->neg; 550 551 if (neg->service_len == svc_len && 552 strncmp(svc_name, neg->service.data, svc_len) == 0) 553 return (hook); 554 } 555 556 return (NULL); 557 } 558 559 /************************************************************************** 560 * Routines to find a particular session that matches an incoming packet. * 561 **************************************************************************/ 562 /* Add specified session to hash. */ 563 static void 564 pppoe_addsession(sessp sp) 565 { 566 const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(sp->hook)); 567 uint16_t hash = SESSHASH(sp->Session_ID); 568 569 mtx_lock(&privp->sesshash[hash].mtx); 570 TAILQ_INSERT_HEAD(&privp->sesshash[hash].head, sp, sessions); 571 mtx_unlock(&privp->sesshash[hash].mtx); 572 } 573 574 /* Delete specified session from hash. */ 575 static void 576 pppoe_delsession(sessp sp) 577 { 578 const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(sp->hook)); 579 uint16_t hash = SESSHASH(sp->Session_ID); 580 581 mtx_lock(&privp->sesshash[hash].mtx); 582 TAILQ_REMOVE(&privp->sesshash[hash].head, sp, sessions); 583 mtx_unlock(&privp->sesshash[hash].mtx); 584 } 585 586 /* Find matching peer/session combination. */ 587 static sessp 588 pppoe_findsession(priv_p privp, const struct pppoe_full_hdr *wh) 589 { 590 uint16_t session = ntohs(wh->ph.sid); 591 uint16_t hash = SESSHASH(session); 592 sessp sp = NULL; 593 594 mtx_lock(&privp->sesshash[hash].mtx); 595 TAILQ_FOREACH(sp, &privp->sesshash[hash].head, sessions) { 596 if (sp->Session_ID == session && 597 bcmp(sp->pkt_hdr.eh.ether_dhost, 598 wh->eh.ether_shost, ETHER_ADDR_LEN) == 0) { 599 break; 600 } 601 } 602 mtx_unlock(&privp->sesshash[hash].mtx); 603 CTR3(KTR_NET, "%20s: matched %p for %d", __func__, sp?sp->hook:NULL, 604 session); 605 606 return (sp); 607 } 608 609 static hook_p 610 pppoe_finduniq(node_p node, const struct pppoe_tag *tag) 611 { 612 hook_p hook = NULL; 613 union uniq uniq; 614 615 bcopy(tag->tag_data, uniq.bytes, sizeof(void *)); 616 /* Cycle through all known hooks. */ 617 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) { 618 /* Skip any nonsession hook. */ 619 if (NG_HOOK_PRIVATE(hook) == NULL) 620 continue; 621 if (uniq.pointer == NG_HOOK_PRIVATE(hook)) 622 break; 623 } 624 CTR3(KTR_NET, "%20s: matched %p for %p", __func__, hook, uniq.pointer); 625 626 return (hook); 627 } 628 629 /************************************************************************** 630 * Start of Netgraph entrypoints. * 631 **************************************************************************/ 632 633 /* 634 * Allocate the private data structure and link it with node. 635 */ 636 static int 637 ng_pppoe_constructor(node_p node) 638 { 639 priv_p privp; 640 int i; 641 642 /* Initialize private descriptor. */ 643 privp = malloc(sizeof(*privp), M_NETGRAPH_PPPOE, M_NOWAIT | M_ZERO); 644 if (privp == NULL) 645 return (ENOMEM); 646 647 /* Link structs together; this counts as our one reference to *node. */ 648 NG_NODE_SET_PRIVATE(node, privp); 649 privp->node = node; 650 651 /* Initialize to standard mode. */ 652 memset(&privp->eh.ether_dhost, 0xff, ETHER_ADDR_LEN); 653 privp->eh.ether_type = ETHERTYPE_PPPOE_DISC; 654 655 for (i = 0; i < SESSHASHSIZE; i++) { 656 mtx_init(&privp->sesshash[i].mtx, "PPPoE hash mutex", NULL, MTX_DEF); 657 TAILQ_INIT(&privp->sesshash[i].head); 658 } 659 660 CTR3(KTR_NET, "%20s: created node [%x] (%p)", 661 __func__, node->nd_ID, node); 662 663 return (0); 664 } 665 666 /* 667 * Give our ok for a hook to be added... 668 * point the hook's private info to the hook structure. 669 * 670 * The following hook names are special: 671 * "ethernet": the hook that should be connected to a NIC. 672 * "debug": copies of data sent out here (when I write the code). 673 * All other hook names need only be unique. (the framework checks this). 674 */ 675 static int 676 ng_pppoe_newhook(node_p node, hook_p hook, const char *name) 677 { 678 const priv_p privp = NG_NODE_PRIVATE(node); 679 sessp sp; 680 681 if (strcmp(name, NG_PPPOE_HOOK_ETHERNET) == 0) { 682 privp->ethernet_hook = hook; 683 NG_HOOK_SET_RCVDATA(hook, ng_pppoe_rcvdata_ether); 684 } else if (strcmp(name, NG_PPPOE_HOOK_DEBUG) == 0) { 685 privp->debug_hook = hook; 686 NG_HOOK_SET_RCVDATA(hook, ng_pppoe_rcvdata_debug); 687 } else { 688 /* 689 * Any other unique name is OK. 690 * The infrastructure has already checked that it's unique, 691 * so just allocate it and hook it in. 692 */ 693 sp = malloc(sizeof(*sp), M_NETGRAPH_PPPOE, M_NOWAIT | M_ZERO); 694 if (sp == NULL) 695 return (ENOMEM); 696 697 NG_HOOK_SET_PRIVATE(hook, sp); 698 sp->hook = hook; 699 } 700 CTR5(KTR_NET, "%20s: node [%x] (%p) connected hook %s (%p)", 701 __func__, node->nd_ID, node, name, hook); 702 703 return(0); 704 } 705 706 /* 707 * Hook has been added successfully. Request the MAC address of 708 * the underlying Ethernet node. 709 */ 710 static int 711 ng_pppoe_connect(hook_p hook) 712 { 713 const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 714 struct ng_mesg *msg; 715 int error; 716 717 if (hook != privp->ethernet_hook) 718 return (0); 719 720 /* 721 * If this is Ethernet hook, then request MAC address 722 * from our downstream. 723 */ 724 NG_MKMESSAGE(msg, NGM_ETHER_COOKIE, NGM_ETHER_GET_ENADDR, 0, M_NOWAIT); 725 if (msg == NULL) 726 return (ENOBUFS); 727 728 /* 729 * Our hook and peer hook have HK_INVALID flag set, 730 * so we can't use NG_SEND_MSG_HOOK() macro here. 731 */ 732 NG_SEND_MSG_ID(error, privp->node, msg, 733 NG_NODE_ID(NG_PEER_NODE(privp->ethernet_hook)), 734 NG_NODE_ID(privp->node)); 735 736 return (error); 737 } 738 /* 739 * Get a netgraph control message. 740 * Check it is one we understand. If needed, send a response. 741 * We sometimes save the address for an async action later. 742 * Always free the message. 743 */ 744 static int 745 ng_pppoe_rcvmsg(node_p node, item_p item, hook_p lasthook) 746 { 747 priv_p privp = NG_NODE_PRIVATE(node); 748 struct ngpppoe_init_data *ourmsg = NULL; 749 struct ng_mesg *resp = NULL; 750 int error = 0; 751 hook_p hook = NULL; 752 sessp sp = NULL; 753 negp neg = NULL; 754 struct ng_mesg *msg; 755 756 NGI_GET_MSG(item, msg); 757 CTR5(KTR_NET, "%20s: node [%x] (%p) got message %d with cookie %d", 758 __func__, node->nd_ID, node, msg->header.cmd, 759 msg->header.typecookie); 760 761 /* Deal with message according to cookie and command. */ 762 switch (msg->header.typecookie) { 763 case NGM_PPPOE_COOKIE: 764 switch (msg->header.cmd) { 765 case NGM_PPPOE_CONNECT: 766 case NGM_PPPOE_LISTEN: 767 case NGM_PPPOE_OFFER: 768 case NGM_PPPOE_SERVICE: 769 ourmsg = (struct ngpppoe_init_data *)msg->data; 770 if (msg->header.arglen < sizeof(*ourmsg)) { 771 log(LOG_ERR, "ng_pppoe[%x]: init data too " 772 "small\n", node->nd_ID); 773 LEAVE(EMSGSIZE); 774 } 775 if (msg->header.arglen - sizeof(*ourmsg) > 776 PPPOE_SERVICE_NAME_SIZE) { 777 log(LOG_ERR, "ng_pppoe[%x]: service name " 778 "too big\n", node->nd_ID); 779 LEAVE(EMSGSIZE); 780 } 781 if (msg->header.arglen - sizeof(*ourmsg) < 782 ourmsg->data_len) { 783 log(LOG_ERR, "ng_pppoe[%x]: init data has bad " 784 "length, %d should be %zd\n", node->nd_ID, 785 ourmsg->data_len, 786 msg->header.arglen - sizeof (*ourmsg)); 787 LEAVE(EMSGSIZE); 788 } 789 790 /* Make sure strcmp will terminate safely. */ 791 ourmsg->hook[sizeof(ourmsg->hook) - 1] = '\0'; 792 793 /* Cycle through all known hooks. */ 794 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) { 795 if (NG_HOOK_NAME(hook) && 796 strcmp(NG_HOOK_NAME(hook), ourmsg->hook) == 797 0) 798 break; 799 } 800 if (hook == NULL) 801 LEAVE(ENOENT); 802 803 sp = NG_HOOK_PRIVATE(hook); 804 805 if (sp == NULL) 806 LEAVE(EINVAL); 807 808 if (msg->header.cmd == NGM_PPPOE_LISTEN) { 809 /* 810 * Ensure we aren't already listening for this 811 * service. 812 */ 813 if (pppoe_find_svc(node, ourmsg->data, 814 ourmsg->data_len) != NULL) 815 LEAVE(EEXIST); 816 } 817 818 /* 819 * PPPOE_SERVICE advertisments are set up 820 * on sessions that are in PRIMED state. 821 */ 822 if (msg->header.cmd == NGM_PPPOE_SERVICE) 823 break; 824 825 if (sp->state != PPPOE_SNONE) { 826 log(LOG_NOTICE, "ng_pppoe[%x]: Session already " 827 "active\n", node->nd_ID); 828 LEAVE(EISCONN); 829 } 830 831 /* 832 * Set up prototype header. 833 */ 834 neg = malloc(sizeof(*neg), M_NETGRAPH_PPPOE, 835 M_NOWAIT | M_ZERO); 836 837 if (neg == NULL) 838 LEAVE(ENOMEM); 839 840 neg->m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 841 if (neg->m == NULL) { 842 free(neg, M_NETGRAPH_PPPOE); 843 LEAVE(ENOBUFS); 844 } 845 neg->m->m_pkthdr.rcvif = NULL; 846 sp->neg = neg; 847 ng_callout_init(&neg->handle); 848 neg->m->m_len = sizeof(struct pppoe_full_hdr); 849 neg->pkt = mtod(neg->m, union packet*); 850 memcpy((void *)&neg->pkt->pkt_header.eh, 851 &privp->eh, sizeof(struct ether_header)); 852 neg->pkt->pkt_header.ph.ver = 0x1; 853 neg->pkt->pkt_header.ph.type = 0x1; 854 neg->pkt->pkt_header.ph.sid = 0x0000; 855 neg->timeout = 0; 856 857 sp->creator = NGI_RETADDR(item); 858 } 859 switch (msg->header.cmd) { 860 case NGM_PPPOE_GET_STATUS: 861 { 862 struct ngpppoestat *stats; 863 864 NG_MKRESPONSE(resp, msg, sizeof(*stats), M_NOWAIT); 865 if (!resp) 866 LEAVE(ENOMEM); 867 868 stats = (struct ngpppoestat *) resp->data; 869 stats->packets_in = privp->packets_in; 870 stats->packets_out = privp->packets_out; 871 break; 872 } 873 case NGM_PPPOE_CONNECT: 874 { 875 /* 876 * Check the hook exists and is Uninitialised. 877 * Send a PADI request, and start the timeout logic. 878 * Store the originator of this message so we can send 879 * a success of fail message to them later. 880 * Move the session to SINIT. 881 * Set up the session to the correct state and 882 * start it. 883 */ 884 int i, acnlen = 0, acnsep = 0, srvlen; 885 for (i = 0; i < ourmsg->data_len; i++) { 886 if (ourmsg->data[i] == '\\') { 887 acnlen = i; 888 acnsep = 1; 889 break; 890 } 891 } 892 srvlen = ourmsg->data_len - acnlen - acnsep; 893 894 bcopy(ourmsg->data, neg->ac_name.data, acnlen); 895 neg->ac_name_len = acnlen; 896 897 neg->service.hdr.tag_type = PTT_SRV_NAME; 898 neg->service.hdr.tag_len = htons((uint16_t)srvlen); 899 bcopy(ourmsg->data + acnlen + acnsep, 900 neg->service.data, srvlen); 901 neg->service_len = srvlen; 902 pppoe_start(sp); 903 break; 904 } 905 case NGM_PPPOE_LISTEN: 906 /* 907 * Check the hook exists and is Uninitialised. 908 * Install the service matching string. 909 * Store the originator of this message so we can send 910 * a success of fail message to them later. 911 * Move the hook to 'LISTENING' 912 */ 913 neg->service.hdr.tag_type = PTT_SRV_NAME; 914 neg->service.hdr.tag_len = 915 htons((uint16_t)ourmsg->data_len); 916 917 if (ourmsg->data_len) 918 bcopy(ourmsg->data, neg->service.data, 919 ourmsg->data_len); 920 neg->service_len = ourmsg->data_len; 921 neg->pkt->pkt_header.ph.code = PADT_CODE; 922 /* 923 * Wait for PADI packet coming from Ethernet. 924 */ 925 sp->state = PPPOE_LISTENING; 926 break; 927 case NGM_PPPOE_OFFER: 928 /* 929 * Check the hook exists and is Uninitialised. 930 * Store the originator of this message so we can send 931 * a success of fail message to them later. 932 * Store the AC-Name given and go to PRIMED. 933 */ 934 neg->ac_name.hdr.tag_type = PTT_AC_NAME; 935 neg->ac_name.hdr.tag_len = 936 htons((uint16_t)ourmsg->data_len); 937 if (ourmsg->data_len) 938 bcopy(ourmsg->data, neg->ac_name.data, 939 ourmsg->data_len); 940 neg->ac_name_len = ourmsg->data_len; 941 neg->pkt->pkt_header.ph.code = PADO_CODE; 942 /* 943 * Wait for PADI packet coming from hook. 944 */ 945 sp->state = PPPOE_PRIMED; 946 break; 947 case NGM_PPPOE_SERVICE: 948 /* 949 * Check the session is primed. 950 * for now just allow ONE service to be advertised. 951 * If you do it twice you just overwrite. 952 */ 953 if (sp->state != PPPOE_PRIMED) { 954 log(LOG_NOTICE, "ng_pppoe[%x]: session not " 955 "primed\n", node->nd_ID); 956 LEAVE(EISCONN); 957 } 958 neg = sp->neg; 959 neg->service.hdr.tag_type = PTT_SRV_NAME; 960 neg->service.hdr.tag_len = 961 htons((uint16_t)ourmsg->data_len); 962 963 if (ourmsg->data_len) 964 bcopy(ourmsg->data, neg->service.data, 965 ourmsg->data_len); 966 neg->service_len = ourmsg->data_len; 967 break; 968 case NGM_PPPOE_SETMODE: 969 { 970 char *s; 971 size_t len; 972 973 if (msg->header.arglen == 0) 974 LEAVE(EINVAL); 975 976 s = (char *)msg->data; 977 len = msg->header.arglen - 1; 978 979 /* Search for matching mode string. */ 980 if (len == strlen(NG_PPPOE_STANDARD) && 981 (strncmp(NG_PPPOE_STANDARD, s, len) == 0)) { 982 privp->flags = 0; 983 privp->eh.ether_type = ETHERTYPE_PPPOE_DISC; 984 break; 985 } 986 if (len == strlen(NG_PPPOE_3COM) && 987 (strncmp(NG_PPPOE_3COM, s, len) == 0)) { 988 privp->flags |= COMPAT_3COM; 989 privp->eh.ether_type = 990 ETHERTYPE_PPPOE_3COM_DISC; 991 break; 992 } 993 if (len == strlen(NG_PPPOE_DLINK) && 994 (strncmp(NG_PPPOE_DLINK, s, len) == 0)) { 995 privp->flags |= COMPAT_DLINK; 996 break; 997 } 998 error = EINVAL; 999 break; 1000 } 1001 case NGM_PPPOE_GETMODE: 1002 { 1003 char *s; 1004 size_t len = 0; 1005 1006 if (privp->flags == 0) 1007 len += strlen(NG_PPPOE_STANDARD) + 1; 1008 if (privp->flags & COMPAT_3COM) 1009 len += strlen(NG_PPPOE_3COM) + 1; 1010 if (privp->flags & COMPAT_DLINK) 1011 len += strlen(NG_PPPOE_DLINK) + 1; 1012 1013 NG_MKRESPONSE(resp, msg, len, M_NOWAIT); 1014 if (resp == NULL) 1015 LEAVE(ENOMEM); 1016 1017 s = (char *)resp->data; 1018 if (privp->flags == 0) { 1019 len = strlen(NG_PPPOE_STANDARD); 1020 strlcpy(s, NG_PPPOE_STANDARD, len + 1); 1021 break; 1022 } 1023 if (privp->flags & COMPAT_3COM) { 1024 len = strlen(NG_PPPOE_3COM); 1025 strlcpy(s, NG_PPPOE_3COM, len + 1); 1026 s += len; 1027 } 1028 if (privp->flags & COMPAT_DLINK) { 1029 if (s != resp->data) 1030 *s++ = '|'; 1031 len = strlen(NG_PPPOE_DLINK); 1032 strlcpy(s, NG_PPPOE_DLINK, len + 1); 1033 } 1034 break; 1035 } 1036 case NGM_PPPOE_SETENADDR: 1037 if (msg->header.arglen != ETHER_ADDR_LEN) 1038 LEAVE(EINVAL); 1039 bcopy(msg->data, &privp->eh.ether_shost, 1040 ETHER_ADDR_LEN); 1041 break; 1042 default: 1043 LEAVE(EINVAL); 1044 } 1045 break; 1046 case NGM_ETHER_COOKIE: 1047 if (!(msg->header.flags & NGF_RESP)) 1048 LEAVE(EINVAL); 1049 switch (msg->header.cmd) { 1050 case NGM_ETHER_GET_ENADDR: 1051 if (msg->header.arglen != ETHER_ADDR_LEN) 1052 LEAVE(EINVAL); 1053 bcopy(msg->data, &privp->eh.ether_shost, 1054 ETHER_ADDR_LEN); 1055 break; 1056 default: 1057 LEAVE(EINVAL); 1058 } 1059 break; 1060 default: 1061 LEAVE(EINVAL); 1062 } 1063 1064 /* Take care of synchronous response, if any. */ 1065 quit: 1066 CTR2(KTR_NET, "%20s: returning %d", __func__, error); 1067 NG_RESPOND_MSG(error, node, item, resp); 1068 /* Free the message and return. */ 1069 NG_FREE_MSG(msg); 1070 return(error); 1071 } 1072 1073 /* 1074 * Start a client into the first state. A separate function because 1075 * it can be needed if the negotiation times out. 1076 */ 1077 static void 1078 pppoe_start(sessp sp) 1079 { 1080 hook_p hook = sp->hook; 1081 node_p node = NG_HOOK_NODE(hook); 1082 priv_p privp = NG_NODE_PRIVATE(node); 1083 negp neg = sp->neg; 1084 struct { 1085 struct pppoe_tag hdr; 1086 union uniq data; 1087 } __packed uniqtag; 1088 struct mbuf *m0; 1089 int error; 1090 1091 /* 1092 * Kick the state machine into starting up. 1093 */ 1094 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID); 1095 sp->state = PPPOE_SINIT; 1096 /* 1097 * Reset the packet header to broadcast. Since we are 1098 * in a client mode use configured ethertype. 1099 */ 1100 memcpy((void *)&neg->pkt->pkt_header.eh, &privp->eh, 1101 sizeof(struct ether_header)); 1102 neg->pkt->pkt_header.ph.code = PADI_CODE; 1103 uniqtag.hdr.tag_type = PTT_HOST_UNIQ; 1104 uniqtag.hdr.tag_len = htons((u_int16_t)sizeof(uniqtag.data)); 1105 uniqtag.data.pointer = sp; 1106 init_tags(sp); 1107 insert_tag(sp, &uniqtag.hdr); 1108 insert_tag(sp, &neg->service.hdr); 1109 make_packet(sp); 1110 /* 1111 * Send packet and prepare to retransmit it after timeout. 1112 */ 1113 ng_callout(&neg->handle, node, hook, PPPOE_INITIAL_TIMEOUT * hz, 1114 pppoe_ticker, NULL, 0); 1115 neg->timeout = PPPOE_INITIAL_TIMEOUT * 2; 1116 m0 = m_copypacket(neg->m, M_DONTWAIT); 1117 NG_SEND_DATA_ONLY(error, privp->ethernet_hook, m0); 1118 } 1119 1120 static int 1121 send_acname(sessp sp, const struct pppoe_tag *tag) 1122 { 1123 int error, tlen; 1124 struct ng_mesg *msg; 1125 struct ngpppoe_sts *sts; 1126 1127 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID); 1128 1129 NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, NGM_PPPOE_ACNAME, 1130 sizeof(struct ngpppoe_sts), M_NOWAIT); 1131 if (msg == NULL) 1132 return (ENOMEM); 1133 1134 sts = (struct ngpppoe_sts *)msg->data; 1135 tlen = min(NG_HOOKSIZ - 1, ntohs(tag->tag_len)); 1136 strncpy(sts->hook, tag->tag_data, tlen); 1137 sts->hook[tlen] = '\0'; 1138 NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0); 1139 1140 return (error); 1141 } 1142 1143 static int 1144 send_sessionid(sessp sp) 1145 { 1146 int error; 1147 struct ng_mesg *msg; 1148 1149 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID); 1150 1151 NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, NGM_PPPOE_SESSIONID, 1152 sizeof(uint16_t), M_NOWAIT); 1153 if (msg == NULL) 1154 return (ENOMEM); 1155 1156 *(uint16_t *)msg->data = sp->Session_ID; 1157 NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0); 1158 1159 return (error); 1160 } 1161 1162 /* 1163 * Receive data from session hook and do something with it. 1164 */ 1165 static int 1166 ng_pppoe_rcvdata(hook_p hook, item_p item) 1167 { 1168 node_p node = NG_HOOK_NODE(hook); 1169 const priv_p privp = NG_NODE_PRIVATE(node); 1170 sessp sp = NG_HOOK_PRIVATE(hook); 1171 struct pppoe_full_hdr *wh; 1172 struct mbuf *m; 1173 int error; 1174 1175 CTR6(KTR_NET, "%20s: node [%x] (%p) received %p on \"%s\" (%p)", 1176 __func__, node->nd_ID, node, item, hook->hk_name, hook); 1177 1178 NGI_GET_M(item, m); 1179 switch (sp->state) { 1180 case PPPOE_NEWCONNECTED: 1181 case PPPOE_CONNECTED: { 1182 /* 1183 * Remove PPP address and control fields, if any. 1184 * For example, ng_ppp(4) always sends LCP packets 1185 * with address and control fields as required by 1186 * generic PPP. PPPoE is an exception to the rule. 1187 */ 1188 if (m->m_pkthdr.len >= 2) { 1189 if (m->m_len < 2 && !(m = m_pullup(m, 2))) 1190 LEAVE(ENOBUFS); 1191 if (mtod(m, u_char *)[0] == 0xff && 1192 mtod(m, u_char *)[1] == 0x03) 1193 m_adj(m, 2); 1194 } 1195 /* 1196 * Bang in a pre-made header, and set the length up 1197 * to be correct. Then send it to the ethernet driver. 1198 */ 1199 M_PREPEND(m, sizeof(*wh), M_DONTWAIT); 1200 if (m == NULL) 1201 LEAVE(ENOBUFS); 1202 1203 wh = mtod(m, struct pppoe_full_hdr *); 1204 bcopy(&sp->pkt_hdr, wh, sizeof(*wh)); 1205 wh->ph.length = htons(m->m_pkthdr.len - sizeof(*wh)); 1206 NG_FWD_NEW_DATA(error, item, privp->ethernet_hook, m); 1207 privp->packets_out++; 1208 break; 1209 } 1210 case PPPOE_PRIMED: { 1211 struct { 1212 struct pppoe_tag hdr; 1213 union uniq data; 1214 } __packed uniqtag; 1215 const struct pppoe_tag *tag; 1216 struct mbuf *m0; 1217 const struct pppoe_hdr *ph; 1218 negp neg = sp->neg; 1219 uint16_t session; 1220 uint16_t length; 1221 uint8_t code; 1222 1223 /* 1224 * A PADI packet is being returned by the application 1225 * that has set up this hook. This indicates that it 1226 * wants us to offer service. 1227 */ 1228 if (m->m_len < sizeof(*wh)) { 1229 m = m_pullup(m, sizeof(*wh)); 1230 if (m == NULL) 1231 LEAVE(ENOBUFS); 1232 } 1233 wh = mtod(m, struct pppoe_full_hdr *); 1234 ph = &wh->ph; 1235 session = ntohs(wh->ph.sid); 1236 length = ntohs(wh->ph.length); 1237 code = wh->ph.code; 1238 /* Use peers mode in session. */ 1239 neg->pkt->pkt_header.eh.ether_type = wh->eh.ether_type; 1240 if (code != PADI_CODE) 1241 LEAVE(EINVAL); 1242 ng_uncallout(&neg->handle, node); 1243 1244 /* 1245 * This is the first time we hear 1246 * from the client, so note it's 1247 * unicast address, replacing the 1248 * broadcast address. 1249 */ 1250 bcopy(wh->eh.ether_shost, 1251 neg->pkt->pkt_header.eh.ether_dhost, 1252 ETHER_ADDR_LEN); 1253 sp->state = PPPOE_SOFFER; 1254 neg->timeout = 0; 1255 neg->pkt->pkt_header.ph.code = PADO_CODE; 1256 1257 /* 1258 * Start working out the tags to respond with. 1259 */ 1260 uniqtag.hdr.tag_type = PTT_AC_COOKIE; 1261 uniqtag.hdr.tag_len = htons((u_int16_t)sizeof(sp)); 1262 uniqtag.data.pointer = sp; 1263 init_tags(sp); 1264 insert_tag(sp, &neg->ac_name.hdr); /* AC_NAME */ 1265 if ((tag = get_tag(ph, PTT_SRV_NAME))) 1266 insert_tag(sp, tag); /* return service */ 1267 /* 1268 * If we have a NULL service request 1269 * and have an extra service defined in this hook, 1270 * then also add a tag for the extra service. 1271 * XXX this is a hack. eventually we should be able 1272 * to support advertising many services, not just one 1273 */ 1274 if (((tag == NULL) || (tag->tag_len == 0)) && 1275 (neg->service.hdr.tag_len != 0)) { 1276 insert_tag(sp, &neg->service.hdr); /* SERVICE */ 1277 } 1278 if ((tag = get_tag(ph, PTT_HOST_UNIQ))) 1279 insert_tag(sp, tag); /* returned hostunique */ 1280 insert_tag(sp, &uniqtag.hdr); 1281 scan_tags(sp, ph); 1282 make_packet(sp); 1283 /* 1284 * Send the offer but if they don't respond 1285 * in PPPOE_OFFER_TIMEOUT seconds, forget about it. 1286 */ 1287 ng_callout(&neg->handle, node, hook, PPPOE_OFFER_TIMEOUT * hz, 1288 pppoe_ticker, NULL, 0); 1289 m0 = m_copypacket(sp->neg->m, M_DONTWAIT); 1290 NG_FWD_NEW_DATA(error, item, privp->ethernet_hook, m0); 1291 privp->packets_out++; 1292 break; 1293 } 1294 1295 /* 1296 * Packets coming from the hook make no sense 1297 * to sessions in the rest of states. Throw them away. 1298 */ 1299 default: 1300 LEAVE(ENETUNREACH); 1301 } 1302 quit: 1303 if (item) 1304 NG_FREE_ITEM(item); 1305 NG_FREE_M(m); 1306 return (error); 1307 } 1308 1309 /* 1310 * Receive data from ether and do something with it. 1311 */ 1312 static int 1313 ng_pppoe_rcvdata_ether(hook_p hook, item_p item) 1314 { 1315 node_p node = NG_HOOK_NODE(hook); 1316 const priv_p privp = NG_NODE_PRIVATE(node); 1317 sessp sp = NG_HOOK_PRIVATE(hook); 1318 const struct pppoe_tag *utag = NULL, *tag = NULL; 1319 const struct pppoe_full_hdr *wh; 1320 const struct pppoe_hdr *ph; 1321 negp neg = NULL; 1322 struct mbuf *m; 1323 hook_p sendhook; 1324 int error = 0; 1325 uint16_t session; 1326 uint16_t length; 1327 uint8_t code; 1328 struct mbuf *m0; 1329 1330 CTR6(KTR_NET, "%20s: node [%x] (%p) received %p on \"%s\" (%p)", 1331 __func__, node->nd_ID, node, item, hook->hk_name, hook); 1332 1333 NGI_GET_M(item, m); 1334 /* 1335 * Dig out various fields from the packet. 1336 * Use them to decide where to send it. 1337 */ 1338 privp->packets_in++; 1339 if( m->m_len < sizeof(*wh)) { 1340 m = m_pullup(m, sizeof(*wh)); /* Checks length */ 1341 if (m == NULL) { 1342 log(LOG_NOTICE, "ng_pppoe[%x]: couldn't " 1343 "m_pullup(wh)\n", node->nd_ID); 1344 LEAVE(ENOBUFS); 1345 } 1346 } 1347 wh = mtod(m, struct pppoe_full_hdr *); 1348 length = ntohs(wh->ph.length); 1349 switch(wh->eh.ether_type) { 1350 case ETHERTYPE_PPPOE_3COM_DISC: /* fall through */ 1351 case ETHERTYPE_PPPOE_DISC: 1352 /* 1353 * We need to try to make sure that the tag area 1354 * is contiguous, or we could wander off the end 1355 * of a buffer and make a mess. 1356 * (Linux wouldn't have this problem). 1357 */ 1358 if (m->m_pkthdr.len <= MHLEN) { 1359 if( m->m_len < m->m_pkthdr.len) { 1360 m = m_pullup(m, m->m_pkthdr.len); 1361 if (m == NULL) { 1362 log(LOG_NOTICE, "ng_pppoe[%x]: " 1363 "couldn't m_pullup(pkthdr)\n", 1364 node->nd_ID); 1365 LEAVE(ENOBUFS); 1366 } 1367 } 1368 } 1369 if (m->m_len != m->m_pkthdr.len) { 1370 /* 1371 * It's not all in one piece. 1372 * We need to do extra work. 1373 * Put it into a cluster. 1374 */ 1375 struct mbuf *n; 1376 n = m_dup(m, M_DONTWAIT); 1377 m_freem(m); 1378 m = n; 1379 if (m) { 1380 /* just check we got a cluster */ 1381 if (m->m_len != m->m_pkthdr.len) { 1382 m_freem(m); 1383 m = NULL; 1384 } 1385 } 1386 if (m == NULL) { 1387 log(LOG_NOTICE, "ng_pppoe[%x]: packet " 1388 "fragmented\n", node->nd_ID); 1389 LEAVE(EMSGSIZE); 1390 } 1391 } 1392 wh = mtod(m, struct pppoe_full_hdr *); 1393 length = ntohs(wh->ph.length); 1394 ph = &wh->ph; 1395 session = ntohs(wh->ph.sid); 1396 code = wh->ph.code; 1397 1398 switch(code) { 1399 case PADI_CODE: 1400 /* 1401 * We are a server: 1402 * Look for a hook with the required service and send 1403 * the ENTIRE packet up there. It should come back to 1404 * a new hook in PRIMED state. Look there for further 1405 * processing. 1406 */ 1407 tag = get_tag(ph, PTT_SRV_NAME); 1408 if (tag == NULL) { 1409 CTR1(KTR_NET, "%20s: PADI w/o Service-Name", 1410 __func__); 1411 LEAVE(ENETUNREACH); 1412 } 1413 1414 /* 1415 * First, try to match Service-Name against our 1416 * listening hooks. If no success and we are in D-Link 1417 * compat mode and Service-Name is empty, then we 1418 * broadcast the PADI to all listening hooks. 1419 */ 1420 sendhook = pppoe_match_svc(node, tag); 1421 if (sendhook != NULL) 1422 NG_FWD_NEW_DATA(error, item, sendhook, m); 1423 else if (privp->flags & COMPAT_DLINK && 1424 ntohs(tag->tag_len) == 0) 1425 error = pppoe_broadcast_padi(node, m); 1426 else 1427 error = ENETUNREACH; 1428 break; 1429 case PADO_CODE: 1430 /* 1431 * We are a client: 1432 * Use the host_uniq tag to find the hook this is in 1433 * response to. Received #2, now send #3 1434 * For now simply accept the first we receive. 1435 */ 1436 utag = get_tag(ph, PTT_HOST_UNIQ); 1437 if ((utag == NULL) || 1438 (ntohs(utag->tag_len) != sizeof(sp))) { 1439 log(LOG_NOTICE, "ng_pppoe[%x]: no host " 1440 "unique field\n", node->nd_ID); 1441 LEAVE(ENETUNREACH); 1442 } 1443 1444 sendhook = pppoe_finduniq(node, utag); 1445 if (sendhook == NULL) { 1446 log(LOG_NOTICE, "ng_pppoe[%x]: no " 1447 "matching session\n", node->nd_ID); 1448 LEAVE(ENETUNREACH); 1449 } 1450 1451 /* 1452 * Check the session is in the right state. 1453 * It needs to be in PPPOE_SINIT. 1454 */ 1455 sp = NG_HOOK_PRIVATE(sendhook); 1456 if (sp->state == PPPOE_SREQ || 1457 sp->state == PPPOE_CONNECTED) { 1458 break; /* Multiple PADO is OK. */ 1459 } 1460 if (sp->state != PPPOE_SINIT) { 1461 log(LOG_NOTICE, "ng_pppoe[%x]: session " 1462 "in wrong state\n", node->nd_ID); 1463 LEAVE(ENETUNREACH); 1464 } 1465 neg = sp->neg; 1466 /* If requested specific AC-name, check it. */ 1467 if (neg->ac_name_len) { 1468 tag = get_tag(ph, PTT_AC_NAME); 1469 if (!tag) { 1470 /* No PTT_AC_NAME in PADO */ 1471 break; 1472 } 1473 if (neg->ac_name_len != htons(tag->tag_len) || 1474 strncmp(neg->ac_name.data, tag->tag_data, 1475 neg->ac_name_len) != 0) { 1476 break; 1477 } 1478 } 1479 sp->state = PPPOE_SREQ; 1480 ng_uncallout(&neg->handle, node); 1481 1482 /* 1483 * This is the first time we hear 1484 * from the server, so note it's 1485 * unicast address, replacing the 1486 * broadcast address . 1487 */ 1488 bcopy(wh->eh.ether_shost, 1489 neg->pkt->pkt_header.eh.ether_dhost, 1490 ETHER_ADDR_LEN); 1491 neg->timeout = 0; 1492 neg->pkt->pkt_header.ph.code = PADR_CODE; 1493 init_tags(sp); 1494 insert_tag(sp, utag); /* Host Unique */ 1495 if ((tag = get_tag(ph, PTT_AC_COOKIE))) 1496 insert_tag(sp, tag); /* return cookie */ 1497 if ((tag = get_tag(ph, PTT_AC_NAME))) { 1498 insert_tag(sp, tag); /* return it */ 1499 send_acname(sp, tag); 1500 } 1501 insert_tag(sp, &neg->service.hdr); /* Service */ 1502 scan_tags(sp, ph); 1503 make_packet(sp); 1504 sp->state = PPPOE_SREQ; 1505 ng_callout(&neg->handle, node, sp->hook, 1506 PPPOE_INITIAL_TIMEOUT * hz, 1507 pppoe_ticker, NULL, 0); 1508 neg->timeout = PPPOE_INITIAL_TIMEOUT * 2; 1509 m0 = m_copypacket(neg->m, M_DONTWAIT); 1510 NG_FWD_NEW_DATA(error, item, privp->ethernet_hook, m0); 1511 break; 1512 case PADR_CODE: 1513 /* 1514 * We are a server: 1515 * Use the ac_cookie tag to find the 1516 * hook this is in response to. 1517 */ 1518 utag = get_tag(ph, PTT_AC_COOKIE); 1519 if ((utag == NULL) || 1520 (ntohs(utag->tag_len) != sizeof(sp))) { 1521 LEAVE(ENETUNREACH); 1522 } 1523 1524 sendhook = pppoe_finduniq(node, utag); 1525 if (sendhook == NULL) 1526 LEAVE(ENETUNREACH); 1527 1528 /* 1529 * Check the session is in the right state. 1530 * It needs to be in PPPOE_SOFFER or PPPOE_NEWCONNECTED. 1531 * If the latter, then this is a retry by the client, 1532 * so be nice, and resend. 1533 */ 1534 sp = NG_HOOK_PRIVATE(sendhook); 1535 if (sp->state == PPPOE_NEWCONNECTED) { 1536 /* 1537 * Whoa! drop back to resend that PADS packet. 1538 * We should still have a copy of it. 1539 */ 1540 sp->state = PPPOE_SOFFER; 1541 } else if (sp->state != PPPOE_SOFFER) 1542 LEAVE (ENETUNREACH); 1543 neg = sp->neg; 1544 ng_uncallout(&neg->handle, node); 1545 neg->pkt->pkt_header.ph.code = PADS_CODE; 1546 if (sp->Session_ID == 0) { 1547 neg->pkt->pkt_header.ph.sid = 1548 htons(sp->Session_ID 1549 = get_new_sid(node)); 1550 pppoe_addsession(sp); 1551 } 1552 send_sessionid(sp); 1553 neg->timeout = 0; 1554 /* 1555 * start working out the tags to respond with. 1556 */ 1557 init_tags(sp); 1558 insert_tag(sp, &neg->ac_name.hdr); /* AC_NAME */ 1559 if ((tag = get_tag(ph, PTT_SRV_NAME))) 1560 insert_tag(sp, tag);/* return service */ 1561 if ((tag = get_tag(ph, PTT_HOST_UNIQ))) 1562 insert_tag(sp, tag); /* return it */ 1563 insert_tag(sp, utag); /* ac_cookie */ 1564 scan_tags(sp, ph); 1565 make_packet(sp); 1566 sp->state = PPPOE_NEWCONNECTED; 1567 1568 /* Send the PADS without a timeout - we're now connected. */ 1569 m0 = m_copypacket(sp->neg->m, M_DONTWAIT); 1570 NG_FWD_NEW_DATA(error, item, privp->ethernet_hook, m0); 1571 1572 /* 1573 * Having sent the last Negotiation header, 1574 * Set up the stored packet header to be correct for 1575 * the actual session. But keep the negotialtion stuff 1576 * around in case we need to resend this last packet. 1577 * We'll discard it when we move from NEWCONNECTED 1578 * to CONNECTED 1579 */ 1580 sp->pkt_hdr = neg->pkt->pkt_header; 1581 /* Configure ethertype depending on what 1582 * ethertype was used at discovery phase */ 1583 if (sp->pkt_hdr.eh.ether_type == 1584 ETHERTYPE_PPPOE_3COM_DISC) 1585 sp->pkt_hdr.eh.ether_type 1586 = ETHERTYPE_PPPOE_3COM_SESS; 1587 else 1588 sp->pkt_hdr.eh.ether_type 1589 = ETHERTYPE_PPPOE_SESS; 1590 sp->pkt_hdr.ph.code = 0; 1591 pppoe_send_event(sp, NGM_PPPOE_SUCCESS); 1592 break; 1593 case PADS_CODE: 1594 /* 1595 * We are a client: 1596 * Use the host_uniq tag to find the hook this is in 1597 * response to. Take the session ID and store it away. 1598 * Also make sure the pre-made header is correct and 1599 * set us into Session mode. 1600 */ 1601 utag = get_tag(ph, PTT_HOST_UNIQ); 1602 if ((utag == NULL) || 1603 (ntohs(utag->tag_len) != sizeof(sp))) { 1604 LEAVE (ENETUNREACH); 1605 } 1606 sendhook = pppoe_finduniq(node, utag); 1607 if (sendhook == NULL) 1608 LEAVE(ENETUNREACH); 1609 1610 /* 1611 * Check the session is in the right state. 1612 * It needs to be in PPPOE_SREQ. 1613 */ 1614 sp = NG_HOOK_PRIVATE(sendhook); 1615 if (sp->state != PPPOE_SREQ) 1616 LEAVE(ENETUNREACH); 1617 neg = sp->neg; 1618 ng_uncallout(&neg->handle, node); 1619 neg->pkt->pkt_header.ph.sid = wh->ph.sid; 1620 sp->Session_ID = ntohs(wh->ph.sid); 1621 pppoe_addsession(sp); 1622 send_sessionid(sp); 1623 neg->timeout = 0; 1624 sp->state = PPPOE_CONNECTED; 1625 /* 1626 * Now we have gone to Connected mode, 1627 * Free all resources needed for negotiation. 1628 * Keep a copy of the header we will be using. 1629 */ 1630 sp->pkt_hdr = neg->pkt->pkt_header; 1631 if (privp->flags & COMPAT_3COM) 1632 sp->pkt_hdr.eh.ether_type 1633 = ETHERTYPE_PPPOE_3COM_SESS; 1634 else 1635 sp->pkt_hdr.eh.ether_type 1636 = ETHERTYPE_PPPOE_SESS; 1637 sp->pkt_hdr.ph.code = 0; 1638 m_freem(neg->m); 1639 free(sp->neg, M_NETGRAPH_PPPOE); 1640 sp->neg = NULL; 1641 pppoe_send_event(sp, NGM_PPPOE_SUCCESS); 1642 break; 1643 case PADT_CODE: 1644 /* 1645 * Find matching peer/session combination. 1646 */ 1647 sp = pppoe_findsession(privp, wh); 1648 if (sp == NULL) 1649 LEAVE(ENETUNREACH); 1650 /* Disconnect that hook. */ 1651 ng_rmhook_self(sp->hook); 1652 break; 1653 default: 1654 LEAVE(EPFNOSUPPORT); 1655 } 1656 break; 1657 case ETHERTYPE_PPPOE_3COM_SESS: 1658 case ETHERTYPE_PPPOE_SESS: 1659 /* 1660 * Find matching peer/session combination. 1661 */ 1662 sp = pppoe_findsession(privp, wh); 1663 if (sp == NULL) 1664 LEAVE (ENETUNREACH); 1665 m_adj(m, sizeof(*wh)); 1666 1667 /* If packet too short, dump it. */ 1668 if (m->m_pkthdr.len < length) 1669 LEAVE(EMSGSIZE); 1670 /* Also need to trim excess at the end */ 1671 if (m->m_pkthdr.len > length) { 1672 m_adj(m, -((int)(m->m_pkthdr.len - length))); 1673 } 1674 if ( sp->state != PPPOE_CONNECTED) { 1675 if (sp->state == PPPOE_NEWCONNECTED) { 1676 sp->state = PPPOE_CONNECTED; 1677 /* 1678 * Now we have gone to Connected mode, 1679 * Free all resources needed for negotiation. 1680 * Be paranoid about whether there may be 1681 * a timeout. 1682 */ 1683 m_freem(sp->neg->m); 1684 ng_uncallout(&sp->neg->handle, node); 1685 free(sp->neg, M_NETGRAPH_PPPOE); 1686 sp->neg = NULL; 1687 } else { 1688 LEAVE (ENETUNREACH); 1689 } 1690 } 1691 NG_FWD_NEW_DATA(error, item, sp->hook, m); 1692 break; 1693 default: 1694 LEAVE(EPFNOSUPPORT); 1695 } 1696 quit: 1697 if (item) 1698 NG_FREE_ITEM(item); 1699 NG_FREE_M(m); 1700 return (error); 1701 } 1702 1703 /* 1704 * Receive data from debug hook and bypass it to ether. 1705 */ 1706 static int 1707 ng_pppoe_rcvdata_debug(hook_p hook, item_p item) 1708 { 1709 node_p node = NG_HOOK_NODE(hook); 1710 const priv_p privp = NG_NODE_PRIVATE(node); 1711 int error; 1712 1713 CTR6(KTR_NET, "%20s: node [%x] (%p) received %p on \"%s\" (%p)", 1714 __func__, node->nd_ID, node, item, hook->hk_name, hook); 1715 1716 NG_FWD_ITEM_HOOK(error, item, privp->ethernet_hook); 1717 privp->packets_out++; 1718 return (error); 1719 } 1720 1721 /* 1722 * Do local shutdown processing.. 1723 * If we are a persistant device, we might refuse to go away, and 1724 * we'd only remove our links and reset ourself. 1725 */ 1726 static int 1727 ng_pppoe_shutdown(node_p node) 1728 { 1729 const priv_p privp = NG_NODE_PRIVATE(node); 1730 int i; 1731 1732 for (i = 0; i < SESSHASHSIZE; i++) 1733 mtx_destroy(&privp->sesshash[i].mtx); 1734 NG_NODE_SET_PRIVATE(node, NULL); 1735 NG_NODE_UNREF(privp->node); 1736 free(privp, M_NETGRAPH_PPPOE); 1737 return (0); 1738 } 1739 1740 /* 1741 * Hook disconnection 1742 * 1743 * Clean up all dangling links and information about the session/hook. 1744 * For this type, removal of the last link destroys the node. 1745 */ 1746 static int 1747 ng_pppoe_disconnect(hook_p hook) 1748 { 1749 node_p node = NG_HOOK_NODE(hook); 1750 priv_p privp = NG_NODE_PRIVATE(node); 1751 sessp sp; 1752 1753 if (hook == privp->debug_hook) { 1754 privp->debug_hook = NULL; 1755 } else if (hook == privp->ethernet_hook) { 1756 privp->ethernet_hook = NULL; 1757 if (NG_NODE_IS_VALID(node)) 1758 ng_rmnode_self(node); 1759 } else { 1760 sp = NG_HOOK_PRIVATE(hook); 1761 if (sp->state != PPPOE_SNONE ) { 1762 pppoe_send_event(sp, NGM_PPPOE_CLOSE); 1763 } 1764 /* 1765 * According to the spec, if we are connected, 1766 * we should send a DISC packet if we are shutting down 1767 * a session. 1768 */ 1769 if ((privp->ethernet_hook) 1770 && ((sp->state == PPPOE_CONNECTED) 1771 || (sp->state == PPPOE_NEWCONNECTED))) { 1772 struct mbuf *m; 1773 1774 /* Generate a packet of that type. */ 1775 MGETHDR(m, M_DONTWAIT, MT_DATA); 1776 if (m == NULL) 1777 log(LOG_NOTICE, "ng_pppoe[%x]: session out of " 1778 "mbufs\n", node->nd_ID); 1779 else { 1780 struct pppoe_full_hdr *wh; 1781 struct pppoe_tag *tag; 1782 int msglen = strlen(SIGNOFF); 1783 int error = 0; 1784 1785 m->m_pkthdr.rcvif = NULL; 1786 m->m_pkthdr.len = m->m_len = sizeof(*wh); 1787 wh = mtod(m, struct pppoe_full_hdr *); 1788 bcopy(&sp->pkt_hdr, wh, sizeof(*wh)); 1789 1790 /* Revert the stored header to DISC/PADT mode. */ 1791 wh->ph.code = PADT_CODE; 1792 /* 1793 * Configure ethertype depending on what 1794 * was used during sessions stage. 1795 */ 1796 if (wh->eh.ether_type == 1797 ETHERTYPE_PPPOE_3COM_SESS) 1798 wh->eh.ether_type = ETHERTYPE_PPPOE_3COM_DISC; 1799 else 1800 wh->eh.ether_type = ETHERTYPE_PPPOE_DISC; 1801 /* 1802 * Add a General error message and adjust 1803 * sizes. 1804 */ 1805 tag = wh->ph.tag; 1806 tag->tag_type = PTT_GEN_ERR; 1807 tag->tag_len = htons((u_int16_t)msglen); 1808 strncpy(tag->tag_data, SIGNOFF, msglen); 1809 m->m_pkthdr.len = (m->m_len += sizeof(*tag) + 1810 msglen); 1811 wh->ph.length = htons(sizeof(*tag) + msglen); 1812 NG_SEND_DATA_ONLY(error, 1813 privp->ethernet_hook, m); 1814 } 1815 } 1816 if (sp->Session_ID) 1817 pppoe_delsession(sp); 1818 /* 1819 * As long as we have somewhere to store the timeout handle, 1820 * we may have a timeout pending.. get rid of it. 1821 */ 1822 if (sp->neg) { 1823 ng_uncallout(&sp->neg->handle, node); 1824 if (sp->neg->m) 1825 m_freem(sp->neg->m); 1826 free(sp->neg, M_NETGRAPH_PPPOE); 1827 } 1828 free(sp, M_NETGRAPH_PPPOE); 1829 NG_HOOK_SET_PRIVATE(hook, NULL); 1830 } 1831 if ((NG_NODE_NUMHOOKS(node) == 0) && 1832 (NG_NODE_IS_VALID(node))) 1833 ng_rmnode_self(node); 1834 return (0); 1835 } 1836 1837 /* 1838 * Timeouts come here. 1839 */ 1840 static void 1841 pppoe_ticker(node_p node, hook_p hook, void *arg1, int arg2) 1842 { 1843 priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 1844 sessp sp = NG_HOOK_PRIVATE(hook); 1845 negp neg = sp->neg; 1846 struct mbuf *m0 = NULL; 1847 int error = 0; 1848 1849 CTR6(KTR_NET, "%20s: node [%x] (%p) hook \"%s\" (%p) session %d", 1850 __func__, node->nd_ID, node, hook->hk_name, hook, sp->Session_ID); 1851 switch(sp->state) { 1852 /* 1853 * Resend the last packet, using an exponential backoff. 1854 * After a period of time, stop growing the backoff, 1855 * And either leave it, or revert to the start. 1856 */ 1857 case PPPOE_SINIT: 1858 case PPPOE_SREQ: 1859 /* Timeouts on these produce resends. */ 1860 m0 = m_copypacket(sp->neg->m, M_DONTWAIT); 1861 NG_SEND_DATA_ONLY( error, privp->ethernet_hook, m0); 1862 ng_callout(&neg->handle, node, hook, neg->timeout * hz, 1863 pppoe_ticker, NULL, 0); 1864 if ((neg->timeout <<= 1) > PPPOE_TIMEOUT_LIMIT) { 1865 if (sp->state == PPPOE_SREQ) { 1866 /* Revert to SINIT mode. */ 1867 pppoe_start(sp); 1868 } else { 1869 neg->timeout = PPPOE_TIMEOUT_LIMIT; 1870 } 1871 } 1872 break; 1873 case PPPOE_PRIMED: 1874 case PPPOE_SOFFER: 1875 /* A timeout on these says "give up" */ 1876 ng_rmhook_self(hook); 1877 break; 1878 default: 1879 /* Timeouts have no meaning in other states. */ 1880 log(LOG_NOTICE, "ng_pppoe[%x]: unexpected timeout\n", 1881 node->nd_ID); 1882 } 1883 } 1884 1885 /* 1886 * Parse an incoming packet to see if any tags should be copied to the 1887 * output packet. Don't do any tags that have been handled in the main 1888 * state machine. 1889 */ 1890 static const struct pppoe_tag* 1891 scan_tags(sessp sp, const struct pppoe_hdr* ph) 1892 { 1893 const char *const end = (const char *)next_tag(ph); 1894 const char *ptn; 1895 const struct pppoe_tag *pt = &ph->tag[0]; 1896 1897 /* 1898 * Keep processing tags while a tag header will still fit. 1899 */ 1900 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID); 1901 1902 while((const char*)(pt + 1) <= end) { 1903 /* 1904 * If the tag data would go past the end of the packet, abort. 1905 */ 1906 ptn = (((const char *)(pt + 1)) + ntohs(pt->tag_len)); 1907 if(ptn > end) 1908 return NULL; 1909 1910 switch (pt->tag_type) { 1911 case PTT_RELAY_SID: 1912 insert_tag(sp, pt); 1913 break; 1914 case PTT_EOL: 1915 return NULL; 1916 case PTT_SRV_NAME: 1917 case PTT_AC_NAME: 1918 case PTT_HOST_UNIQ: 1919 case PTT_AC_COOKIE: 1920 case PTT_VENDOR: 1921 case PTT_SRV_ERR: 1922 case PTT_SYS_ERR: 1923 case PTT_GEN_ERR: 1924 break; 1925 } 1926 pt = (const struct pppoe_tag*)ptn; 1927 } 1928 return NULL; 1929 } 1930 1931 static int 1932 pppoe_send_event(sessp sp, enum cmd cmdid) 1933 { 1934 int error; 1935 struct ng_mesg *msg; 1936 struct ngpppoe_sts *sts; 1937 1938 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID); 1939 1940 NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, cmdid, 1941 sizeof(struct ngpppoe_sts), M_NOWAIT); 1942 if (msg == NULL) 1943 return (ENOMEM); 1944 sts = (struct ngpppoe_sts *)msg->data; 1945 strncpy(sts->hook, NG_HOOK_NAME(sp->hook), NG_HOOKSIZ); 1946 NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0); 1947 return (error); 1948 } 1949