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: src/sys/netgraph/ng_pppoe.c,v 1.94 2008/03/03 19:36:03 mav Exp $ 41 * $DragonFly: src/sys/netgraph7/ng_pppoe.c,v 1.2 2008/06/26 23:05:35 dillon Exp $ 42 * $Whistle: ng_pppoe.c,v 1.10 1999/11/01 09:24:52 julian Exp $ 43 */ 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/ktr.h> 49 #include <sys/mbuf.h> 50 #include <sys/malloc.h> 51 #include <sys/errno.h> 52 #include <sys/syslog.h> 53 #include <net/ethernet.h> 54 55 #include <netgraph7/ng_message.h> 56 #include <netgraph7/netgraph.h> 57 #include <netgraph7/ng_parse.h> 58 #include "ng_pppoe.h" 59 #include <netgraph7/ether/ng_ether.h> 60 61 #ifdef NG_SEPARATE_MALLOC 62 MALLOC_DEFINE(M_NETGRAPH_PPPOE, "netgraph_pppoe", "netgraph pppoe node"); 63 #else 64 #define M_NETGRAPH_PPPOE M_NETGRAPH 65 #endif 66 67 #define SIGNOFF "session closed" 68 69 /* 70 * This section contains the netgraph method declarations for the 71 * pppoe node. These methods define the netgraph pppoe 'type'. 72 */ 73 74 static ng_constructor_t ng_pppoe_constructor; 75 static ng_rcvmsg_t ng_pppoe_rcvmsg; 76 static ng_shutdown_t ng_pppoe_shutdown; 77 static ng_newhook_t ng_pppoe_newhook; 78 static ng_connect_t ng_pppoe_connect; 79 static ng_rcvdata_t ng_pppoe_rcvdata; 80 static ng_rcvdata_t ng_pppoe_rcvdata_ether; 81 static ng_rcvdata_t ng_pppoe_rcvdata_debug; 82 static ng_disconnect_t ng_pppoe_disconnect; 83 84 /* Parse type for struct ngpppoe_init_data */ 85 static const struct ng_parse_struct_field ngpppoe_init_data_type_fields[] 86 = NG_PPPOE_INIT_DATA_TYPE_INFO; 87 static const struct ng_parse_type ngpppoe_init_data_state_type = { 88 &ng_parse_struct_type, 89 &ngpppoe_init_data_type_fields 90 }; 91 92 /* Parse type for struct ngpppoe_sts */ 93 static const struct ng_parse_struct_field ng_pppoe_sts_type_fields[] 94 = NG_PPPOE_STS_TYPE_INFO; 95 static const struct ng_parse_type ng_pppoe_sts_state_type = { 96 &ng_parse_struct_type, 97 &ng_pppoe_sts_type_fields 98 }; 99 100 /* List of commands and how to convert arguments to/from ASCII */ 101 static const struct ng_cmdlist ng_pppoe_cmds[] = { 102 { 103 NGM_PPPOE_COOKIE, 104 NGM_PPPOE_CONNECT, 105 "pppoe_connect", 106 &ngpppoe_init_data_state_type, 107 NULL 108 }, 109 { 110 NGM_PPPOE_COOKIE, 111 NGM_PPPOE_LISTEN, 112 "pppoe_listen", 113 &ngpppoe_init_data_state_type, 114 NULL 115 }, 116 { 117 NGM_PPPOE_COOKIE, 118 NGM_PPPOE_OFFER, 119 "pppoe_offer", 120 &ngpppoe_init_data_state_type, 121 NULL 122 }, 123 { 124 NGM_PPPOE_COOKIE, 125 NGM_PPPOE_SERVICE, 126 "pppoe_service", 127 &ngpppoe_init_data_state_type, 128 NULL 129 }, 130 { 131 NGM_PPPOE_COOKIE, 132 NGM_PPPOE_SUCCESS, 133 "pppoe_success", 134 &ng_pppoe_sts_state_type, 135 NULL 136 }, 137 { 138 NGM_PPPOE_COOKIE, 139 NGM_PPPOE_FAIL, 140 "pppoe_fail", 141 &ng_pppoe_sts_state_type, 142 NULL 143 }, 144 { 145 NGM_PPPOE_COOKIE, 146 NGM_PPPOE_CLOSE, 147 "pppoe_close", 148 &ng_pppoe_sts_state_type, 149 NULL 150 }, 151 { 152 NGM_PPPOE_COOKIE, 153 NGM_PPPOE_SETMODE, 154 "pppoe_setmode", 155 &ng_parse_string_type, 156 NULL 157 }, 158 { 159 NGM_PPPOE_COOKIE, 160 NGM_PPPOE_GETMODE, 161 "pppoe_getmode", 162 NULL, 163 &ng_parse_string_type 164 }, 165 { 166 NGM_PPPOE_COOKIE, 167 NGM_PPPOE_SETENADDR, 168 "setenaddr", 169 &ng_parse_enaddr_type, 170 NULL 171 }, 172 { 0 } 173 }; 174 175 /* Netgraph node type descriptor */ 176 static struct ng_type typestruct = { 177 .version = NG_ABI_VERSION, 178 .name = NG_PPPOE_NODE_TYPE, 179 .constructor = ng_pppoe_constructor, 180 .rcvmsg = ng_pppoe_rcvmsg, 181 .shutdown = ng_pppoe_shutdown, 182 .newhook = ng_pppoe_newhook, 183 .connect = ng_pppoe_connect, 184 .rcvdata = ng_pppoe_rcvdata, 185 .disconnect = ng_pppoe_disconnect, 186 .cmdlist = ng_pppoe_cmds, 187 }; 188 NETGRAPH_INIT(pppoe, &typestruct); 189 190 /* 191 * States for the session state machine. 192 * These have no meaning if there is no hook attached yet. 193 */ 194 enum state { 195 PPPOE_SNONE=0, /* [both] Initial state */ 196 PPPOE_LISTENING, /* [Daemon] Listening for discover initiation pkt */ 197 PPPOE_SINIT, /* [Client] Sent discovery initiation */ 198 PPPOE_PRIMED, /* [Server] Awaiting PADI from daemon */ 199 PPPOE_SOFFER, /* [Server] Sent offer message (got PADI)*/ 200 PPPOE_SREQ, /* [Client] Sent a Request */ 201 PPPOE_NEWCONNECTED, /* [Server] Connection established, No data received */ 202 PPPOE_CONNECTED, /* [Both] Connection established, Data received */ 203 PPPOE_DEAD /* [Both] */ 204 }; 205 206 #define NUMTAGS 20 /* number of tags we are set up to work with */ 207 208 /* 209 * Information we store for each hook on each node for negotiating the 210 * session. The mbuf and cluster are freed once negotiation has completed. 211 * The whole negotiation block is then discarded. 212 */ 213 214 struct sess_neg { 215 struct mbuf *m; /* holds cluster with last sent packet */ 216 union packet *pkt; /* points within the above cluster */ 217 struct callout handle; /* see timeout(9) */ 218 u_int timeout; /* 0,1,2,4,8,16 etc. seconds */ 219 u_int numtags; 220 const struct pppoe_tag *tags[NUMTAGS]; 221 u_int service_len; 222 u_int ac_name_len; 223 224 struct datatag service; 225 struct datatag ac_name; 226 }; 227 typedef struct sess_neg *negp; 228 229 /* 230 * Session information that is needed after connection. 231 */ 232 struct sess_con { 233 hook_p hook; 234 uint16_t Session_ID; 235 enum state state; 236 ng_ID_t creator; /* who to notify */ 237 struct pppoe_full_hdr pkt_hdr; /* used when connected */ 238 negp neg; /* used when negotiating */ 239 LIST_ENTRY(sess_con) sessions; 240 }; 241 typedef struct sess_con *sessp; 242 243 #define SESSHASHSIZE 0x0100 244 #define SESSHASH(x) (((x) ^ ((x) >> 8)) & (SESSHASHSIZE - 1)) 245 246 struct sess_hash_entry { 247 struct mtx mtx; 248 LIST_HEAD(hhead, sess_con) head; 249 }; 250 251 /* 252 * Information we store for each node 253 */ 254 struct PPPoE { 255 node_p node; /* back pointer to node */ 256 hook_p ethernet_hook; 257 hook_p debug_hook; 258 u_int packets_in; /* packets in from ethernet */ 259 u_int packets_out; /* packets out towards ethernet */ 260 uint32_t flags; 261 #define COMPAT_3COM 0x00000001 262 #define COMPAT_DLINK 0x00000002 263 struct ether_header eh; 264 LIST_HEAD(, sess_con) listeners; 265 struct sess_hash_entry sesshash[SESSHASHSIZE]; 266 }; 267 typedef struct PPPoE *priv_p; 268 269 union uniq { 270 char bytes[sizeof(void *)]; 271 void *pointer; 272 }; 273 274 #define LEAVE(x) do { error = x; goto quit; } while(0) 275 static void pppoe_start(sessp sp); 276 static void pppoe_ticker(node_p node, hook_p hook, void *arg1, int arg2); 277 static const struct pppoe_tag *scan_tags(sessp sp, 278 const struct pppoe_hdr* ph); 279 static int pppoe_send_event(sessp sp, enum cmd cmdid); 280 281 /************************************************************************* 282 * Some basic utilities from the Linux version with author's permission.* 283 * Author: Michal Ostrowski <mostrows@styx.uwaterloo.ca> * 284 ************************************************************************/ 285 286 287 288 /* 289 * Return the location where the next tag can be put 290 */ 291 static __inline const struct pppoe_tag* 292 next_tag(const struct pppoe_hdr* ph) 293 { 294 return (const struct pppoe_tag*)(((const char*)&ph->tag[0]) 295 + ntohs(ph->length)); 296 } 297 298 /* 299 * Look for a tag of a specific type. 300 * Don't trust any length the other end says, 301 * but assume we already sanity checked ph->length. 302 */ 303 static const struct pppoe_tag* 304 get_tag(const struct pppoe_hdr* ph, uint16_t idx) 305 { 306 const char *const end = (const char *)next_tag(ph); 307 const struct pppoe_tag *pt = &ph->tag[0]; 308 const char *ptn; 309 310 /* 311 * Keep processing tags while a tag header will still fit. 312 */ 313 while((const char*)(pt + 1) <= end) { 314 /* 315 * If the tag data would go past the end of the packet, abort. 316 */ 317 ptn = (((const char *)(pt + 1)) + ntohs(pt->tag_len)); 318 if (ptn > end) { 319 CTR2(KTR_NET, "%20s: invalid length for tag %d", 320 __func__, idx); 321 return (NULL); 322 } 323 if (pt->tag_type == idx) { 324 CTR2(KTR_NET, "%20s: found tag %d", __func__, idx); 325 return (pt); 326 } 327 328 pt = (const struct pppoe_tag*)ptn; 329 } 330 331 CTR2(KTR_NET, "%20s: not found tag %d", __func__, idx); 332 return (NULL); 333 } 334 335 /************************************************************************** 336 * Inlines to initialise or add tags to a session's tag list. 337 **************************************************************************/ 338 /* 339 * Initialise the session's tag list. 340 */ 341 static void 342 init_tags(sessp sp) 343 { 344 KASSERT(sp->neg != NULL, ("%s: no neg", __func__)); 345 sp->neg->numtags = 0; 346 } 347 348 static void 349 insert_tag(sessp sp, const struct pppoe_tag *tp) 350 { 351 negp neg = sp->neg; 352 int i; 353 354 KASSERT(neg != NULL, ("%s: no neg", __func__)); 355 if ((i = neg->numtags++) < NUMTAGS) { 356 neg->tags[i] = tp; 357 } else { 358 log(LOG_NOTICE, "ng_pppoe: asked to add too many tags to " 359 "packet\n"); 360 neg->numtags--; 361 } 362 } 363 364 /* 365 * Make up a packet, using the tags filled out for the session. 366 * 367 * Assume that the actual pppoe header and ethernet header 368 * are filled out externally to this routine. 369 * Also assume that neg->wh points to the correct 370 * location at the front of the buffer space. 371 */ 372 static void 373 make_packet(sessp sp) { 374 struct pppoe_full_hdr *wh = &sp->neg->pkt->pkt_header; 375 const struct pppoe_tag **tag; 376 char *dp; 377 int count; 378 int tlen; 379 uint16_t length = 0; 380 381 KASSERT((sp->neg != NULL) && (sp->neg->m != NULL), 382 ("%s: called from wrong state", __func__)); 383 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID); 384 385 dp = (char *)wh->ph.tag; 386 for (count = 0, tag = sp->neg->tags; 387 ((count < sp->neg->numtags) && (count < NUMTAGS)); 388 tag++, count++) { 389 tlen = ntohs((*tag)->tag_len) + sizeof(**tag); 390 if ((length + tlen) > (ETHER_MAX_LEN - 4 - sizeof(*wh))) { 391 log(LOG_NOTICE, "ng_pppoe: tags too long\n"); 392 sp->neg->numtags = count; 393 break; /* XXX chop off what's too long */ 394 } 395 bcopy(*tag, (char *)dp, tlen); 396 length += tlen; 397 dp += tlen; 398 } 399 wh->ph.length = htons(length); 400 sp->neg->m->m_len = length + sizeof(*wh); 401 sp->neg->m->m_pkthdr.len = length + sizeof(*wh); 402 } 403 404 /************************************************************************** 405 * Routines to match a service. * 406 **************************************************************************/ 407 408 /* 409 * Find a hook that has a service string that matches that 410 * we are seeking. For now use a simple string. 411 * In the future we may need something like regexp(). 412 * 413 * Null string is a wildcard (ANY service), according to RFC2516. 414 * And historical FreeBSD wildcard is also "*". 415 */ 416 417 static hook_p 418 pppoe_match_svc(node_p node, const struct pppoe_tag *tag) 419 { 420 const priv_p privp = NG_NODE_PRIVATE(node); 421 sessp sp; 422 423 LIST_FOREACH(sp, &privp->listeners, sessions) { 424 negp neg = sp->neg; 425 426 /* Empty Service-Name matches any service. */ 427 if (neg->service_len == 0) 428 break; 429 430 /* Special case for a blank or "*" service name (wildcard). */ 431 if (neg->service_len == 1 && neg->service.data[0] == '*') 432 break; 433 434 /* If the lengths don't match, that aint it. */ 435 if (neg->service_len != ntohs(tag->tag_len)) 436 continue; 437 438 if (strncmp(tag->tag_data, neg->service.data, 439 ntohs(tag->tag_len)) == 0) 440 break; 441 } 442 CTR3(KTR_NET, "%20s: matched %p for %s", __func__, 443 sp?sp->hook:NULL, tag->tag_data); 444 445 return (sp?sp->hook:NULL); 446 } 447 448 /* 449 * Broadcast the PADI packet in m0 to all listening hooks. 450 * This routine is called when a PADI with empty Service-Name 451 * tag is received. Client should receive PADOs with all 452 * available services. 453 */ 454 static int 455 pppoe_broadcast_padi(node_p node, struct mbuf *m0) 456 { 457 const priv_p privp = NG_NODE_PRIVATE(node); 458 sessp sp; 459 int error = 0; 460 461 LIST_FOREACH(sp, &privp->listeners, sessions) { 462 struct mbuf *m; 463 464 m = m_dup(m0, MB_DONTWAIT); 465 if (m == NULL) 466 return (ENOMEM); 467 NG_SEND_DATA_ONLY(error, sp->hook, m); 468 if (error) 469 return (error); 470 } 471 472 return (0); 473 } 474 475 /* 476 * Find a hook, which name equals to given service. 477 */ 478 static hook_p 479 pppoe_find_svc(node_p node, const char *svc_name, int svc_len) 480 { 481 const priv_p privp = NG_NODE_PRIVATE(node); 482 sessp sp; 483 484 LIST_FOREACH(sp, &privp->listeners, sessions) { 485 negp neg = sp->neg; 486 487 if (neg->service_len == svc_len && 488 strncmp(svc_name, neg->service.data, svc_len) == 0) 489 return (sp->hook); 490 } 491 492 return (NULL); 493 } 494 495 /************************************************************************** 496 * Routines to find a particular session that matches an incoming packet. * 497 **************************************************************************/ 498 /* Find free session and add to hash. */ 499 static uint16_t 500 pppoe_getnewsession(sessp sp) 501 { 502 const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(sp->hook)); 503 static uint16_t pppoe_sid = 1; 504 sessp tsp; 505 uint16_t val, hash; 506 507 restart: 508 /* Atomicity is not needed here as value will be checked. */ 509 val = pppoe_sid++; 510 /* Spec says 0xFFFF is reserved, also don't use 0x0000. */ 511 if (val == 0xffff || val == 0x0000) 512 val = pppoe_sid = 1; 513 514 /* Check it isn't already in use. */ 515 hash = SESSHASH(val); 516 mtx_lock(&privp->sesshash[hash].mtx); 517 LIST_FOREACH(tsp, &privp->sesshash[hash].head, sessions) { 518 if (tsp->Session_ID == val) 519 break; 520 } 521 if (!tsp) { 522 sp->Session_ID = val; 523 LIST_INSERT_HEAD(&privp->sesshash[hash].head, sp, sessions); 524 } 525 mtx_unlock(&privp->sesshash[hash].mtx); 526 if (tsp) 527 goto restart; 528 529 CTR2(KTR_NET, "%20s: new sid %d", __func__, val); 530 531 return (val); 532 } 533 534 /* Add specified session to hash. */ 535 static void 536 pppoe_addsession(sessp sp) 537 { 538 const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(sp->hook)); 539 uint16_t hash = SESSHASH(sp->Session_ID); 540 541 mtx_lock(&privp->sesshash[hash].mtx); 542 LIST_INSERT_HEAD(&privp->sesshash[hash].head, sp, sessions); 543 mtx_unlock(&privp->sesshash[hash].mtx); 544 } 545 546 /* Delete specified session from hash. */ 547 static void 548 pppoe_delsession(sessp sp) 549 { 550 const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(sp->hook)); 551 uint16_t hash = SESSHASH(sp->Session_ID); 552 553 mtx_lock(&privp->sesshash[hash].mtx); 554 LIST_REMOVE(sp, sessions); 555 mtx_unlock(&privp->sesshash[hash].mtx); 556 } 557 558 /* Find matching peer/session combination. */ 559 static sessp 560 pppoe_findsession(priv_p privp, const struct pppoe_full_hdr *wh) 561 { 562 uint16_t session = ntohs(wh->ph.sid); 563 uint16_t hash = SESSHASH(session); 564 sessp sp = NULL; 565 566 mtx_lock(&privp->sesshash[hash].mtx); 567 LIST_FOREACH(sp, &privp->sesshash[hash].head, sessions) { 568 if (sp->Session_ID == session && 569 bcmp(sp->pkt_hdr.eh.ether_dhost, 570 wh->eh.ether_shost, ETHER_ADDR_LEN) == 0) { 571 break; 572 } 573 } 574 mtx_unlock(&privp->sesshash[hash].mtx); 575 CTR3(KTR_NET, "%20s: matched %p for %d", __func__, sp?sp->hook:NULL, 576 session); 577 578 return (sp); 579 } 580 581 static hook_p 582 pppoe_finduniq(node_p node, const struct pppoe_tag *tag) 583 { 584 hook_p hook = NULL; 585 union uniq uniq; 586 587 bcopy(tag->tag_data, uniq.bytes, sizeof(void *)); 588 /* Cycle through all known hooks. */ 589 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) { 590 /* Skip any nonsession hook. */ 591 if (NG_HOOK_PRIVATE(hook) == NULL) 592 continue; 593 if (uniq.pointer == NG_HOOK_PRIVATE(hook)) 594 break; 595 } 596 CTR3(KTR_NET, "%20s: matched %p for %p", __func__, hook, uniq.pointer); 597 598 return (hook); 599 } 600 601 /************************************************************************** 602 * Start of Netgraph entrypoints. * 603 **************************************************************************/ 604 605 /* 606 * Allocate the private data structure and link it with node. 607 */ 608 static int 609 ng_pppoe_constructor(node_p node) 610 { 611 priv_p privp; 612 int i; 613 614 /* Initialize private descriptor. */ 615 privp = kmalloc(sizeof(*privp), M_NETGRAPH_PPPOE, M_WAITOK | M_NULLOK | M_ZERO); 616 if (privp == NULL) 617 return (ENOMEM); 618 619 /* Link structs together; this counts as our one reference to *node. */ 620 NG_NODE_SET_PRIVATE(node, privp); 621 privp->node = node; 622 623 /* Initialize to standard mode. */ 624 memset(&privp->eh.ether_dhost, 0xff, ETHER_ADDR_LEN); 625 privp->eh.ether_type = ETHERTYPE_PPPOE_DISC; 626 627 LIST_INIT(&privp->listeners); 628 for (i = 0; i < SESSHASHSIZE; i++) { 629 mtx_init(&privp->sesshash[i].mtx); 630 LIST_INIT(&privp->sesshash[i].head); 631 } 632 633 CTR3(KTR_NET, "%20s: created node [%x] (%p)", 634 __func__, node->nd_ID, node); 635 636 return (0); 637 } 638 639 /* 640 * Give our ok for a hook to be added... 641 * point the hook's private info to the hook structure. 642 * 643 * The following hook names are special: 644 * "ethernet": the hook that should be connected to a NIC. 645 * "debug": copies of data sent out here (when I write the code). 646 * All other hook names need only be unique. (the framework checks this). 647 */ 648 static int 649 ng_pppoe_newhook(node_p node, hook_p hook, const char *name) 650 { 651 const priv_p privp = NG_NODE_PRIVATE(node); 652 sessp sp; 653 654 if (strcmp(name, NG_PPPOE_HOOK_ETHERNET) == 0) { 655 privp->ethernet_hook = hook; 656 NG_HOOK_SET_RCVDATA(hook, ng_pppoe_rcvdata_ether); 657 } else if (strcmp(name, NG_PPPOE_HOOK_DEBUG) == 0) { 658 privp->debug_hook = hook; 659 NG_HOOK_SET_RCVDATA(hook, ng_pppoe_rcvdata_debug); 660 } else { 661 /* 662 * Any other unique name is OK. 663 * The infrastructure has already checked that it's unique, 664 * so just allocate it and hook it in. 665 */ 666 sp = kmalloc(sizeof(*sp), M_NETGRAPH_PPPOE, M_WAITOK | M_NULLOK | M_ZERO); 667 if (sp == NULL) 668 return (ENOMEM); 669 670 NG_HOOK_SET_PRIVATE(hook, sp); 671 sp->hook = hook; 672 } 673 CTR5(KTR_NET, "%20s: node [%x] (%p) connected hook %s (%p)", 674 __func__, node->nd_ID, node, name, hook); 675 676 return(0); 677 } 678 679 /* 680 * Hook has been added successfully. Request the MAC address of 681 * the underlying Ethernet node. 682 */ 683 static int 684 ng_pppoe_connect(hook_p hook) 685 { 686 const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 687 struct ng_mesg *msg; 688 int error; 689 690 if (hook != privp->ethernet_hook) 691 return (0); 692 693 /* 694 * If this is Ethernet hook, then request MAC address 695 * from our downstream. 696 */ 697 NG_MKMESSAGE(msg, NGM_ETHER_COOKIE, NGM_ETHER_GET_ENADDR, 0, M_WAITOK | M_NULLOK); 698 if (msg == NULL) 699 return (ENOBUFS); 700 701 /* 702 * Our hook and peer hook have HK_INVALID flag set, 703 * so we can't use NG_SEND_MSG_HOOK() macro here. 704 */ 705 NG_SEND_MSG_ID(error, privp->node, msg, 706 NG_NODE_ID(NG_PEER_NODE(privp->ethernet_hook)), 707 NG_NODE_ID(privp->node)); 708 709 return (error); 710 } 711 /* 712 * Get a netgraph control message. 713 * Check it is one we understand. If needed, send a response. 714 * We sometimes save the address for an async action later. 715 * Always free the message. 716 */ 717 static int 718 ng_pppoe_rcvmsg(node_p node, item_p item, hook_p lasthook) 719 { 720 priv_p privp = NG_NODE_PRIVATE(node); 721 struct ngpppoe_init_data *ourmsg = NULL; 722 struct ng_mesg *resp = NULL; 723 int error = 0; 724 hook_p hook = NULL; 725 sessp sp = NULL; 726 negp neg = NULL; 727 struct ng_mesg *msg; 728 729 NGI_GET_MSG(item, msg); 730 CTR5(KTR_NET, "%20s: node [%x] (%p) got message %d with cookie %d", 731 __func__, node->nd_ID, node, msg->header.cmd, 732 msg->header.typecookie); 733 734 /* Deal with message according to cookie and command. */ 735 switch (msg->header.typecookie) { 736 case NGM_PPPOE_COOKIE: 737 switch (msg->header.cmd) { 738 case NGM_PPPOE_CONNECT: 739 case NGM_PPPOE_LISTEN: 740 case NGM_PPPOE_OFFER: 741 case NGM_PPPOE_SERVICE: 742 ourmsg = (struct ngpppoe_init_data *)msg->data; 743 if (msg->header.arglen < sizeof(*ourmsg)) { 744 log(LOG_ERR, "ng_pppoe[%x]: init data too " 745 "small\n", node->nd_ID); 746 LEAVE(EMSGSIZE); 747 } 748 if (msg->header.arglen - sizeof(*ourmsg) > 749 PPPOE_SERVICE_NAME_SIZE) { 750 log(LOG_ERR, "ng_pppoe[%x]: service name " 751 "too big\n", node->nd_ID); 752 LEAVE(EMSGSIZE); 753 } 754 if (msg->header.arglen - sizeof(*ourmsg) < 755 ourmsg->data_len) { 756 log(LOG_ERR, "ng_pppoe[%x]: init data has bad " 757 "length, %d should be %zd\n", node->nd_ID, 758 ourmsg->data_len, 759 msg->header.arglen - sizeof (*ourmsg)); 760 LEAVE(EMSGSIZE); 761 } 762 763 /* Make sure strcmp will terminate safely. */ 764 ourmsg->hook[sizeof(ourmsg->hook) - 1] = '\0'; 765 766 /* Find hook by name. */ 767 hook = ng_findhook(node, ourmsg->hook); 768 if (hook == NULL) 769 LEAVE(ENOENT); 770 771 sp = NG_HOOK_PRIVATE(hook); 772 if (sp == NULL) 773 LEAVE(EINVAL); 774 775 if (msg->header.cmd == NGM_PPPOE_LISTEN) { 776 /* 777 * Ensure we aren't already listening for this 778 * service. 779 */ 780 if (pppoe_find_svc(node, ourmsg->data, 781 ourmsg->data_len) != NULL) 782 LEAVE(EEXIST); 783 } 784 785 /* 786 * PPPOE_SERVICE advertisments are set up 787 * on sessions that are in PRIMED state. 788 */ 789 if (msg->header.cmd == NGM_PPPOE_SERVICE) 790 break; 791 792 if (sp->state != PPPOE_SNONE) { 793 log(LOG_NOTICE, "ng_pppoe[%x]: Session already " 794 "active\n", node->nd_ID); 795 LEAVE(EISCONN); 796 } 797 798 /* 799 * Set up prototype header. 800 */ 801 neg = kmalloc(sizeof(*neg), M_NETGRAPH_PPPOE, 802 M_WAITOK | M_NULLOK | M_ZERO); 803 804 if (neg == NULL) 805 LEAVE(ENOMEM); 806 807 neg->m = m_getcl(MB_DONTWAIT, MT_DATA, M_PKTHDR); 808 if (neg->m == NULL) { 809 kfree(neg, M_NETGRAPH_PPPOE); 810 LEAVE(ENOBUFS); 811 } 812 neg->m->m_pkthdr.rcvif = NULL; 813 sp->neg = neg; 814 ng_callout_init(&neg->handle); 815 neg->m->m_len = sizeof(struct pppoe_full_hdr); 816 neg->pkt = mtod(neg->m, union packet*); 817 memcpy((void *)&neg->pkt->pkt_header.eh, 818 &privp->eh, sizeof(struct ether_header)); 819 neg->pkt->pkt_header.ph.ver = 0x1; 820 neg->pkt->pkt_header.ph.type = 0x1; 821 neg->pkt->pkt_header.ph.sid = 0x0000; 822 neg->timeout = 0; 823 824 sp->creator = NGI_RETADDR(item); 825 } 826 switch (msg->header.cmd) { 827 case NGM_PPPOE_GET_STATUS: 828 { 829 struct ngpppoestat *stats; 830 831 NG_MKRESPONSE(resp, msg, sizeof(*stats), M_WAITOK | M_NULLOK); 832 if (!resp) 833 LEAVE(ENOMEM); 834 835 stats = (struct ngpppoestat *) resp->data; 836 stats->packets_in = privp->packets_in; 837 stats->packets_out = privp->packets_out; 838 break; 839 } 840 case NGM_PPPOE_CONNECT: 841 { 842 /* 843 * Check the hook exists and is Uninitialised. 844 * Send a PADI request, and start the timeout logic. 845 * Store the originator of this message so we can send 846 * a success of fail message to them later. 847 * Move the session to SINIT. 848 * Set up the session to the correct state and 849 * start it. 850 */ 851 int i, acnlen = 0, acnsep = 0, srvlen; 852 for (i = 0; i < ourmsg->data_len; i++) { 853 if (ourmsg->data[i] == '\\') { 854 acnlen = i; 855 acnsep = 1; 856 break; 857 } 858 } 859 srvlen = ourmsg->data_len - acnlen - acnsep; 860 861 bcopy(ourmsg->data, neg->ac_name.data, acnlen); 862 neg->ac_name_len = acnlen; 863 864 neg->service.hdr.tag_type = PTT_SRV_NAME; 865 neg->service.hdr.tag_len = htons((uint16_t)srvlen); 866 bcopy(ourmsg->data + acnlen + acnsep, 867 neg->service.data, srvlen); 868 neg->service_len = srvlen; 869 pppoe_start(sp); 870 break; 871 } 872 case NGM_PPPOE_LISTEN: 873 /* 874 * Check the hook exists and is Uninitialised. 875 * Install the service matching string. 876 * Store the originator of this message so we can send 877 * a success of fail message to them later. 878 * Move the hook to 'LISTENING' 879 */ 880 neg->service.hdr.tag_type = PTT_SRV_NAME; 881 neg->service.hdr.tag_len = 882 htons((uint16_t)ourmsg->data_len); 883 884 if (ourmsg->data_len) 885 bcopy(ourmsg->data, neg->service.data, 886 ourmsg->data_len); 887 neg->service_len = ourmsg->data_len; 888 neg->pkt->pkt_header.ph.code = PADT_CODE; 889 /* 890 * Wait for PADI packet coming from Ethernet. 891 */ 892 sp->state = PPPOE_LISTENING; 893 LIST_INSERT_HEAD(&privp->listeners, sp, sessions); 894 break; 895 case NGM_PPPOE_OFFER: 896 /* 897 * Check the hook exists and is Uninitialised. 898 * Store the originator of this message so we can send 899 * a success of fail message to them later. 900 * Store the AC-Name given and go to PRIMED. 901 */ 902 neg->ac_name.hdr.tag_type = PTT_AC_NAME; 903 neg->ac_name.hdr.tag_len = 904 htons((uint16_t)ourmsg->data_len); 905 if (ourmsg->data_len) 906 bcopy(ourmsg->data, neg->ac_name.data, 907 ourmsg->data_len); 908 neg->ac_name_len = ourmsg->data_len; 909 neg->pkt->pkt_header.ph.code = PADO_CODE; 910 /* 911 * Wait for PADI packet coming from hook. 912 */ 913 sp->state = PPPOE_PRIMED; 914 break; 915 case NGM_PPPOE_SERVICE: 916 /* 917 * Check the session is primed. 918 * for now just allow ONE service to be advertised. 919 * If you do it twice you just overwrite. 920 */ 921 if (sp->state != PPPOE_PRIMED) { 922 log(LOG_NOTICE, "ng_pppoe[%x]: session not " 923 "primed\n", node->nd_ID); 924 LEAVE(EISCONN); 925 } 926 neg = sp->neg; 927 neg->service.hdr.tag_type = PTT_SRV_NAME; 928 neg->service.hdr.tag_len = 929 htons((uint16_t)ourmsg->data_len); 930 931 if (ourmsg->data_len) 932 bcopy(ourmsg->data, neg->service.data, 933 ourmsg->data_len); 934 neg->service_len = ourmsg->data_len; 935 break; 936 case NGM_PPPOE_SETMODE: 937 { 938 char *s; 939 size_t len; 940 941 if (msg->header.arglen == 0) 942 LEAVE(EINVAL); 943 944 s = (char *)msg->data; 945 len = msg->header.arglen - 1; 946 947 /* Search for matching mode string. */ 948 if (len == strlen(NG_PPPOE_STANDARD) && 949 (strncmp(NG_PPPOE_STANDARD, s, len) == 0)) { 950 privp->flags = 0; 951 privp->eh.ether_type = ETHERTYPE_PPPOE_DISC; 952 break; 953 } 954 if (len == strlen(NG_PPPOE_3COM) && 955 (strncmp(NG_PPPOE_3COM, s, len) == 0)) { 956 privp->flags |= COMPAT_3COM; 957 privp->eh.ether_type = 958 ETHERTYPE_PPPOE_3COM_DISC; 959 break; 960 } 961 if (len == strlen(NG_PPPOE_DLINK) && 962 (strncmp(NG_PPPOE_DLINK, s, len) == 0)) { 963 privp->flags |= COMPAT_DLINK; 964 break; 965 } 966 error = EINVAL; 967 break; 968 } 969 case NGM_PPPOE_GETMODE: 970 { 971 char *s; 972 size_t len = 0; 973 974 if (privp->flags == 0) 975 len += strlen(NG_PPPOE_STANDARD) + 1; 976 if (privp->flags & COMPAT_3COM) 977 len += strlen(NG_PPPOE_3COM) + 1; 978 if (privp->flags & COMPAT_DLINK) 979 len += strlen(NG_PPPOE_DLINK) + 1; 980 981 NG_MKRESPONSE(resp, msg, len, M_WAITOK | M_NULLOK); 982 if (resp == NULL) 983 LEAVE(ENOMEM); 984 985 s = (char *)resp->data; 986 if (privp->flags == 0) { 987 len = strlen(NG_PPPOE_STANDARD); 988 strlcpy(s, NG_PPPOE_STANDARD, len + 1); 989 break; 990 } 991 if (privp->flags & COMPAT_3COM) { 992 len = strlen(NG_PPPOE_3COM); 993 strlcpy(s, NG_PPPOE_3COM, len + 1); 994 s += len; 995 } 996 if (privp->flags & COMPAT_DLINK) { 997 if (s != resp->data) 998 *s++ = '|'; 999 len = strlen(NG_PPPOE_DLINK); 1000 strlcpy(s, NG_PPPOE_DLINK, len + 1); 1001 } 1002 break; 1003 } 1004 case NGM_PPPOE_SETENADDR: 1005 if (msg->header.arglen != ETHER_ADDR_LEN) 1006 LEAVE(EINVAL); 1007 bcopy(msg->data, &privp->eh.ether_shost, 1008 ETHER_ADDR_LEN); 1009 break; 1010 default: 1011 LEAVE(EINVAL); 1012 } 1013 break; 1014 case NGM_ETHER_COOKIE: 1015 if (!(msg->header.flags & NGF_RESP)) 1016 LEAVE(EINVAL); 1017 switch (msg->header.cmd) { 1018 case NGM_ETHER_GET_ENADDR: 1019 if (msg->header.arglen != ETHER_ADDR_LEN) 1020 LEAVE(EINVAL); 1021 bcopy(msg->data, &privp->eh.ether_shost, 1022 ETHER_ADDR_LEN); 1023 break; 1024 default: 1025 LEAVE(EINVAL); 1026 } 1027 break; 1028 default: 1029 LEAVE(EINVAL); 1030 } 1031 1032 /* Take care of synchronous response, if any. */ 1033 quit: 1034 CTR2(KTR_NET, "%20s: returning %d", __func__, error); 1035 NG_RESPOND_MSG(error, node, item, resp); 1036 /* Free the message and return. */ 1037 NG_FREE_MSG(msg); 1038 return(error); 1039 } 1040 1041 /* 1042 * Start a client into the first state. A separate function because 1043 * it can be needed if the negotiation times out. 1044 */ 1045 static void 1046 pppoe_start(sessp sp) 1047 { 1048 hook_p hook = sp->hook; 1049 node_p node = NG_HOOK_NODE(hook); 1050 priv_p privp = NG_NODE_PRIVATE(node); 1051 negp neg = sp->neg; 1052 struct { 1053 struct pppoe_tag hdr; 1054 union uniq data; 1055 } __packed uniqtag; 1056 struct mbuf *m0; 1057 int error; 1058 1059 /* 1060 * Kick the state machine into starting up. 1061 */ 1062 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID); 1063 sp->state = PPPOE_SINIT; 1064 /* 1065 * Reset the packet header to broadcast. Since we are 1066 * in a client mode use configured ethertype. 1067 */ 1068 memcpy((void *)&neg->pkt->pkt_header.eh, &privp->eh, 1069 sizeof(struct ether_header)); 1070 neg->pkt->pkt_header.ph.code = PADI_CODE; 1071 uniqtag.hdr.tag_type = PTT_HOST_UNIQ; 1072 uniqtag.hdr.tag_len = htons((u_int16_t)sizeof(uniqtag.data)); 1073 uniqtag.data.pointer = sp; 1074 init_tags(sp); 1075 insert_tag(sp, &uniqtag.hdr); 1076 insert_tag(sp, &neg->service.hdr); 1077 make_packet(sp); 1078 /* 1079 * Send packet and prepare to retransmit it after timeout. 1080 */ 1081 ng_callout(&neg->handle, node, hook, PPPOE_INITIAL_TIMEOUT * hz, 1082 pppoe_ticker, NULL, 0); 1083 neg->timeout = PPPOE_INITIAL_TIMEOUT * 2; 1084 m0 = m_copypacket(neg->m, MB_DONTWAIT); 1085 NG_SEND_DATA_ONLY(error, privp->ethernet_hook, m0); 1086 } 1087 1088 static int 1089 send_acname(sessp sp, const struct pppoe_tag *tag) 1090 { 1091 int error, tlen; 1092 struct ng_mesg *msg; 1093 struct ngpppoe_sts *sts; 1094 1095 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID); 1096 1097 NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, NGM_PPPOE_ACNAME, 1098 sizeof(struct ngpppoe_sts), M_WAITOK | M_NULLOK); 1099 if (msg == NULL) 1100 return (ENOMEM); 1101 1102 sts = (struct ngpppoe_sts *)msg->data; 1103 tlen = min(NG_HOOKSIZ - 1, ntohs(tag->tag_len)); 1104 strncpy(sts->hook, tag->tag_data, tlen); 1105 sts->hook[tlen] = '\0'; 1106 NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0); 1107 1108 return (error); 1109 } 1110 1111 static int 1112 send_sessionid(sessp sp) 1113 { 1114 int error; 1115 struct ng_mesg *msg; 1116 1117 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID); 1118 1119 NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, NGM_PPPOE_SESSIONID, 1120 sizeof(uint16_t), M_WAITOK | M_NULLOK); 1121 if (msg == NULL) 1122 return (ENOMEM); 1123 1124 *(uint16_t *)msg->data = sp->Session_ID; 1125 NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0); 1126 1127 return (error); 1128 } 1129 1130 /* 1131 * Receive data from session hook and do something with it. 1132 */ 1133 static int 1134 ng_pppoe_rcvdata(hook_p hook, item_p item) 1135 { 1136 node_p node = NG_HOOK_NODE(hook); 1137 const priv_p privp = NG_NODE_PRIVATE(node); 1138 sessp sp = NG_HOOK_PRIVATE(hook); 1139 struct pppoe_full_hdr *wh; 1140 struct mbuf *m; 1141 int error; 1142 1143 CTR6(KTR_NET, "%20s: node [%x] (%p) received %p on \"%s\" (%p)", 1144 __func__, node->nd_ID, node, item, hook->hk_name, hook); 1145 1146 NGI_GET_M(item, m); 1147 switch (sp->state) { 1148 case PPPOE_NEWCONNECTED: 1149 case PPPOE_CONNECTED: { 1150 /* 1151 * Remove PPP address and control fields, if any. 1152 * For example, ng_ppp(4) always sends LCP packets 1153 * with address and control fields as required by 1154 * generic PPP. PPPoE is an exception to the rule. 1155 */ 1156 if (m->m_pkthdr.len >= 2) { 1157 if (m->m_len < 2 && !(m = m_pullup(m, 2))) 1158 LEAVE(ENOBUFS); 1159 if (mtod(m, u_char *)[0] == 0xff && 1160 mtod(m, u_char *)[1] == 0x03) 1161 m_adj(m, 2); 1162 } 1163 /* 1164 * Bang in a pre-made header, and set the length up 1165 * to be correct. Then send it to the ethernet driver. 1166 */ 1167 M_PREPEND(m, sizeof(*wh), MB_DONTWAIT); 1168 if (m == NULL) 1169 LEAVE(ENOBUFS); 1170 1171 wh = mtod(m, struct pppoe_full_hdr *); 1172 bcopy(&sp->pkt_hdr, wh, sizeof(*wh)); 1173 wh->ph.length = htons(m->m_pkthdr.len - sizeof(*wh)); 1174 NG_FWD_NEW_DATA(error, item, privp->ethernet_hook, m); 1175 privp->packets_out++; 1176 break; 1177 } 1178 case PPPOE_PRIMED: { 1179 struct { 1180 struct pppoe_tag hdr; 1181 union uniq data; 1182 } __packed uniqtag; 1183 const struct pppoe_tag *tag; 1184 struct mbuf *m0; 1185 const struct pppoe_hdr *ph; 1186 negp neg = sp->neg; 1187 uint16_t session; 1188 uint16_t length; 1189 uint8_t code; 1190 1191 /* 1192 * A PADI packet is being returned by the application 1193 * that has set up this hook. This indicates that it 1194 * wants us to offer service. 1195 */ 1196 if (m->m_len < sizeof(*wh)) { 1197 m = m_pullup(m, sizeof(*wh)); 1198 if (m == NULL) 1199 LEAVE(ENOBUFS); 1200 } 1201 wh = mtod(m, struct pppoe_full_hdr *); 1202 ph = &wh->ph; 1203 session = ntohs(wh->ph.sid); 1204 length = ntohs(wh->ph.length); 1205 code = wh->ph.code; 1206 /* Use peers mode in session. */ 1207 neg->pkt->pkt_header.eh.ether_type = wh->eh.ether_type; 1208 if (code != PADI_CODE) 1209 LEAVE(EINVAL); 1210 ng_uncallout(&neg->handle, node); 1211 1212 /* 1213 * This is the first time we hear 1214 * from the client, so note it's 1215 * unicast address, replacing the 1216 * broadcast address. 1217 */ 1218 bcopy(wh->eh.ether_shost, 1219 neg->pkt->pkt_header.eh.ether_dhost, 1220 ETHER_ADDR_LEN); 1221 sp->state = PPPOE_SOFFER; 1222 neg->timeout = 0; 1223 neg->pkt->pkt_header.ph.code = PADO_CODE; 1224 1225 /* 1226 * Start working out the tags to respond with. 1227 */ 1228 uniqtag.hdr.tag_type = PTT_AC_COOKIE; 1229 uniqtag.hdr.tag_len = htons((u_int16_t)sizeof(sp)); 1230 uniqtag.data.pointer = sp; 1231 init_tags(sp); 1232 insert_tag(sp, &neg->ac_name.hdr); /* AC_NAME */ 1233 if ((tag = get_tag(ph, PTT_SRV_NAME))) 1234 insert_tag(sp, tag); /* return service */ 1235 /* 1236 * If we have a NULL service request 1237 * and have an extra service defined in this hook, 1238 * then also add a tag for the extra service. 1239 * XXX this is a hack. eventually we should be able 1240 * to support advertising many services, not just one 1241 */ 1242 if (((tag == NULL) || (tag->tag_len == 0)) && 1243 (neg->service.hdr.tag_len != 0)) { 1244 insert_tag(sp, &neg->service.hdr); /* SERVICE */ 1245 } 1246 if ((tag = get_tag(ph, PTT_HOST_UNIQ))) 1247 insert_tag(sp, tag); /* returned hostunique */ 1248 insert_tag(sp, &uniqtag.hdr); 1249 scan_tags(sp, ph); 1250 make_packet(sp); 1251 /* 1252 * Send the offer but if they don't respond 1253 * in PPPOE_OFFER_TIMEOUT seconds, forget about it. 1254 */ 1255 ng_callout(&neg->handle, node, hook, PPPOE_OFFER_TIMEOUT * hz, 1256 pppoe_ticker, NULL, 0); 1257 m0 = m_copypacket(sp->neg->m, MB_DONTWAIT); 1258 NG_FWD_NEW_DATA(error, item, privp->ethernet_hook, m0); 1259 privp->packets_out++; 1260 break; 1261 } 1262 1263 /* 1264 * Packets coming from the hook make no sense 1265 * to sessions in the rest of states. Throw them away. 1266 */ 1267 default: 1268 LEAVE(ENETUNREACH); 1269 } 1270 quit: 1271 if (item) 1272 NG_FREE_ITEM(item); 1273 NG_FREE_M(m); 1274 return (error); 1275 } 1276 1277 /* 1278 * Receive data from ether and do something with it. 1279 */ 1280 static int 1281 ng_pppoe_rcvdata_ether(hook_p hook, item_p item) 1282 { 1283 node_p node = NG_HOOK_NODE(hook); 1284 const priv_p privp = NG_NODE_PRIVATE(node); 1285 sessp sp = NG_HOOK_PRIVATE(hook); 1286 const struct pppoe_tag *utag = NULL, *tag = NULL; 1287 const struct pppoe_full_hdr *wh; 1288 const struct pppoe_hdr *ph; 1289 negp neg = NULL; 1290 struct mbuf *m; 1291 hook_p sendhook; 1292 int error = 0; 1293 uint16_t session; 1294 uint16_t length; 1295 uint8_t code; 1296 struct mbuf *m0; 1297 1298 CTR6(KTR_NET, "%20s: node [%x] (%p) received %p on \"%s\" (%p)", 1299 __func__, node->nd_ID, node, item, hook->hk_name, hook); 1300 1301 NGI_GET_M(item, m); 1302 /* 1303 * Dig out various fields from the packet. 1304 * Use them to decide where to send it. 1305 */ 1306 privp->packets_in++; 1307 if( m->m_len < sizeof(*wh)) { 1308 m = m_pullup(m, sizeof(*wh)); /* Checks length */ 1309 if (m == NULL) { 1310 log(LOG_NOTICE, "ng_pppoe[%x]: couldn't " 1311 "m_pullup(wh)\n", node->nd_ID); 1312 LEAVE(ENOBUFS); 1313 } 1314 } 1315 wh = mtod(m, struct pppoe_full_hdr *); 1316 length = ntohs(wh->ph.length); 1317 switch(wh->eh.ether_type) { 1318 case ETHERTYPE_PPPOE_3COM_DISC: /* fall through */ 1319 case ETHERTYPE_PPPOE_DISC: 1320 /* 1321 * We need to try to make sure that the tag area 1322 * is contiguous, or we could wander off the end 1323 * of a buffer and make a mess. 1324 * (Linux wouldn't have this problem). 1325 */ 1326 if (m->m_pkthdr.len <= MHLEN) { 1327 if( m->m_len < m->m_pkthdr.len) { 1328 m = m_pullup(m, m->m_pkthdr.len); 1329 if (m == NULL) { 1330 log(LOG_NOTICE, "ng_pppoe[%x]: " 1331 "couldn't m_pullup(pkthdr)\n", 1332 node->nd_ID); 1333 LEAVE(ENOBUFS); 1334 } 1335 } 1336 } 1337 if (m->m_len != m->m_pkthdr.len) { 1338 /* 1339 * It's not all in one piece. 1340 * We need to do extra work. 1341 * Put it into a cluster. 1342 */ 1343 struct mbuf *n; 1344 n = m_dup(m, MB_DONTWAIT); 1345 m_freem(m); 1346 m = n; 1347 if (m) { 1348 /* just check we got a cluster */ 1349 if (m->m_len != m->m_pkthdr.len) { 1350 m_freem(m); 1351 m = NULL; 1352 } 1353 } 1354 if (m == NULL) { 1355 log(LOG_NOTICE, "ng_pppoe[%x]: packet " 1356 "fragmented\n", node->nd_ID); 1357 LEAVE(EMSGSIZE); 1358 } 1359 } 1360 wh = mtod(m, struct pppoe_full_hdr *); 1361 length = ntohs(wh->ph.length); 1362 ph = &wh->ph; 1363 session = ntohs(wh->ph.sid); 1364 code = wh->ph.code; 1365 1366 switch(code) { 1367 case PADI_CODE: 1368 /* 1369 * We are a server: 1370 * Look for a hook with the required service and send 1371 * the ENTIRE packet up there. It should come back to 1372 * a new hook in PRIMED state. Look there for further 1373 * processing. 1374 */ 1375 tag = get_tag(ph, PTT_SRV_NAME); 1376 if (tag == NULL) { 1377 CTR1(KTR_NET, "%20s: PADI w/o Service-Name", 1378 __func__); 1379 LEAVE(ENETUNREACH); 1380 } 1381 1382 /* 1383 * First, try to match Service-Name against our 1384 * listening hooks. If no success and we are in D-Link 1385 * compat mode and Service-Name is empty, then we 1386 * broadcast the PADI to all listening hooks. 1387 */ 1388 sendhook = pppoe_match_svc(node, tag); 1389 if (sendhook != NULL) 1390 NG_FWD_NEW_DATA(error, item, sendhook, m); 1391 else if (privp->flags & COMPAT_DLINK && 1392 ntohs(tag->tag_len) == 0) 1393 error = pppoe_broadcast_padi(node, m); 1394 else 1395 error = ENETUNREACH; 1396 break; 1397 case PADO_CODE: 1398 /* 1399 * We are a client: 1400 * Use the host_uniq tag to find the hook this is in 1401 * response to. Received #2, now send #3 1402 * For now simply accept the first we receive. 1403 */ 1404 utag = get_tag(ph, PTT_HOST_UNIQ); 1405 if ((utag == NULL) || 1406 (ntohs(utag->tag_len) != sizeof(sp))) { 1407 log(LOG_NOTICE, "ng_pppoe[%x]: no host " 1408 "unique field\n", node->nd_ID); 1409 LEAVE(ENETUNREACH); 1410 } 1411 1412 sendhook = pppoe_finduniq(node, utag); 1413 if (sendhook == NULL) { 1414 log(LOG_NOTICE, "ng_pppoe[%x]: no " 1415 "matching session\n", node->nd_ID); 1416 LEAVE(ENETUNREACH); 1417 } 1418 1419 /* 1420 * Check the session is in the right state. 1421 * It needs to be in PPPOE_SINIT. 1422 */ 1423 sp = NG_HOOK_PRIVATE(sendhook); 1424 if (sp->state == PPPOE_SREQ || 1425 sp->state == PPPOE_CONNECTED) { 1426 break; /* Multiple PADO is OK. */ 1427 } 1428 if (sp->state != PPPOE_SINIT) { 1429 log(LOG_NOTICE, "ng_pppoe[%x]: session " 1430 "in wrong state\n", node->nd_ID); 1431 LEAVE(ENETUNREACH); 1432 } 1433 neg = sp->neg; 1434 /* If requested specific AC-name, check it. */ 1435 if (neg->ac_name_len) { 1436 tag = get_tag(ph, PTT_AC_NAME); 1437 if (!tag) { 1438 /* No PTT_AC_NAME in PADO */ 1439 break; 1440 } 1441 if (neg->ac_name_len != htons(tag->tag_len) || 1442 strncmp(neg->ac_name.data, tag->tag_data, 1443 neg->ac_name_len) != 0) { 1444 break; 1445 } 1446 } 1447 sp->state = PPPOE_SREQ; 1448 ng_uncallout(&neg->handle, node); 1449 1450 /* 1451 * This is the first time we hear 1452 * from the server, so note it's 1453 * unicast address, replacing the 1454 * broadcast address . 1455 */ 1456 bcopy(wh->eh.ether_shost, 1457 neg->pkt->pkt_header.eh.ether_dhost, 1458 ETHER_ADDR_LEN); 1459 neg->timeout = 0; 1460 neg->pkt->pkt_header.ph.code = PADR_CODE; 1461 init_tags(sp); 1462 insert_tag(sp, utag); /* Host Unique */ 1463 if ((tag = get_tag(ph, PTT_AC_COOKIE))) 1464 insert_tag(sp, tag); /* return cookie */ 1465 if ((tag = get_tag(ph, PTT_AC_NAME))) { 1466 insert_tag(sp, tag); /* return it */ 1467 send_acname(sp, tag); 1468 } 1469 insert_tag(sp, &neg->service.hdr); /* Service */ 1470 scan_tags(sp, ph); 1471 make_packet(sp); 1472 sp->state = PPPOE_SREQ; 1473 ng_callout(&neg->handle, node, sp->hook, 1474 PPPOE_INITIAL_TIMEOUT * hz, 1475 pppoe_ticker, NULL, 0); 1476 neg->timeout = PPPOE_INITIAL_TIMEOUT * 2; 1477 m0 = m_copypacket(neg->m, MB_DONTWAIT); 1478 NG_FWD_NEW_DATA(error, item, privp->ethernet_hook, m0); 1479 break; 1480 case PADR_CODE: 1481 /* 1482 * We are a server: 1483 * Use the ac_cookie tag to find the 1484 * hook this is in response to. 1485 */ 1486 utag = get_tag(ph, PTT_AC_COOKIE); 1487 if ((utag == NULL) || 1488 (ntohs(utag->tag_len) != sizeof(sp))) { 1489 LEAVE(ENETUNREACH); 1490 } 1491 1492 sendhook = pppoe_finduniq(node, utag); 1493 if (sendhook == NULL) 1494 LEAVE(ENETUNREACH); 1495 1496 /* 1497 * Check the session is in the right state. 1498 * It needs to be in PPPOE_SOFFER or PPPOE_NEWCONNECTED. 1499 * If the latter, then this is a retry by the client, 1500 * so be nice, and resend. 1501 */ 1502 sp = NG_HOOK_PRIVATE(sendhook); 1503 if (sp->state == PPPOE_NEWCONNECTED) { 1504 /* 1505 * Whoa! drop back to resend that PADS packet. 1506 * We should still have a copy of it. 1507 */ 1508 sp->state = PPPOE_SOFFER; 1509 } else if (sp->state != PPPOE_SOFFER) 1510 LEAVE (ENETUNREACH); 1511 neg = sp->neg; 1512 ng_uncallout(&neg->handle, node); 1513 neg->pkt->pkt_header.ph.code = PADS_CODE; 1514 if (sp->Session_ID == 0) { 1515 neg->pkt->pkt_header.ph.sid = 1516 htons(pppoe_getnewsession(sp)); 1517 } 1518 send_sessionid(sp); 1519 neg->timeout = 0; 1520 /* 1521 * start working out the tags to respond with. 1522 */ 1523 init_tags(sp); 1524 insert_tag(sp, &neg->ac_name.hdr); /* AC_NAME */ 1525 if ((tag = get_tag(ph, PTT_SRV_NAME))) 1526 insert_tag(sp, tag);/* return service */ 1527 if ((tag = get_tag(ph, PTT_HOST_UNIQ))) 1528 insert_tag(sp, tag); /* return it */ 1529 insert_tag(sp, utag); /* ac_cookie */ 1530 scan_tags(sp, ph); 1531 make_packet(sp); 1532 sp->state = PPPOE_NEWCONNECTED; 1533 1534 /* Send the PADS without a timeout - we're now connected. */ 1535 m0 = m_copypacket(sp->neg->m, MB_DONTWAIT); 1536 NG_FWD_NEW_DATA(error, item, privp->ethernet_hook, m0); 1537 1538 /* 1539 * Having sent the last Negotiation header, 1540 * Set up the stored packet header to be correct for 1541 * the actual session. But keep the negotialtion stuff 1542 * around in case we need to resend this last packet. 1543 * We'll discard it when we move from NEWCONNECTED 1544 * to CONNECTED 1545 */ 1546 sp->pkt_hdr = neg->pkt->pkt_header; 1547 /* Configure ethertype depending on what 1548 * ethertype was used at discovery phase */ 1549 if (sp->pkt_hdr.eh.ether_type == 1550 ETHERTYPE_PPPOE_3COM_DISC) 1551 sp->pkt_hdr.eh.ether_type 1552 = ETHERTYPE_PPPOE_3COM_SESS; 1553 else 1554 sp->pkt_hdr.eh.ether_type 1555 = ETHERTYPE_PPPOE_SESS; 1556 sp->pkt_hdr.ph.code = 0; 1557 pppoe_send_event(sp, NGM_PPPOE_SUCCESS); 1558 break; 1559 case PADS_CODE: 1560 /* 1561 * We are a client: 1562 * Use the host_uniq tag to find the hook this is in 1563 * response to. Take the session ID and store it away. 1564 * Also make sure the pre-made header is correct and 1565 * set us into Session mode. 1566 */ 1567 utag = get_tag(ph, PTT_HOST_UNIQ); 1568 if ((utag == NULL) || 1569 (ntohs(utag->tag_len) != sizeof(sp))) { 1570 LEAVE (ENETUNREACH); 1571 } 1572 sendhook = pppoe_finduniq(node, utag); 1573 if (sendhook == NULL) 1574 LEAVE(ENETUNREACH); 1575 1576 /* 1577 * Check the session is in the right state. 1578 * It needs to be in PPPOE_SREQ. 1579 */ 1580 sp = NG_HOOK_PRIVATE(sendhook); 1581 if (sp->state != PPPOE_SREQ) 1582 LEAVE(ENETUNREACH); 1583 neg = sp->neg; 1584 ng_uncallout(&neg->handle, node); 1585 neg->pkt->pkt_header.ph.sid = wh->ph.sid; 1586 sp->Session_ID = ntohs(wh->ph.sid); 1587 pppoe_addsession(sp); 1588 send_sessionid(sp); 1589 neg->timeout = 0; 1590 sp->state = PPPOE_CONNECTED; 1591 /* 1592 * Now we have gone to Connected mode, 1593 * Free all resources needed for negotiation. 1594 * Keep a copy of the header we will be using. 1595 */ 1596 sp->pkt_hdr = neg->pkt->pkt_header; 1597 if (privp->flags & COMPAT_3COM) 1598 sp->pkt_hdr.eh.ether_type 1599 = ETHERTYPE_PPPOE_3COM_SESS; 1600 else 1601 sp->pkt_hdr.eh.ether_type 1602 = ETHERTYPE_PPPOE_SESS; 1603 sp->pkt_hdr.ph.code = 0; 1604 m_freem(neg->m); 1605 kfree(sp->neg, M_NETGRAPH_PPPOE); 1606 sp->neg = NULL; 1607 pppoe_send_event(sp, NGM_PPPOE_SUCCESS); 1608 break; 1609 case PADT_CODE: 1610 /* 1611 * Find matching peer/session combination. 1612 */ 1613 sp = pppoe_findsession(privp, wh); 1614 if (sp == NULL) 1615 LEAVE(ENETUNREACH); 1616 /* Disconnect that hook. */ 1617 ng_rmhook_self(sp->hook); 1618 break; 1619 default: 1620 LEAVE(EPFNOSUPPORT); 1621 } 1622 break; 1623 case ETHERTYPE_PPPOE_3COM_SESS: 1624 case ETHERTYPE_PPPOE_SESS: 1625 /* 1626 * Find matching peer/session combination. 1627 */ 1628 sp = pppoe_findsession(privp, wh); 1629 if (sp == NULL) 1630 LEAVE (ENETUNREACH); 1631 m_adj(m, sizeof(*wh)); 1632 1633 /* If packet too short, dump it. */ 1634 if (m->m_pkthdr.len < length) 1635 LEAVE(EMSGSIZE); 1636 /* Also need to trim excess at the end */ 1637 if (m->m_pkthdr.len > length) { 1638 m_adj(m, -((int)(m->m_pkthdr.len - length))); 1639 } 1640 if ( sp->state != PPPOE_CONNECTED) { 1641 if (sp->state == PPPOE_NEWCONNECTED) { 1642 sp->state = PPPOE_CONNECTED; 1643 /* 1644 * Now we have gone to Connected mode, 1645 * Free all resources needed for negotiation. 1646 * Be paranoid about whether there may be 1647 * a timeout. 1648 */ 1649 m_freem(sp->neg->m); 1650 ng_uncallout(&sp->neg->handle, node); 1651 kfree(sp->neg, M_NETGRAPH_PPPOE); 1652 sp->neg = NULL; 1653 } else { 1654 LEAVE (ENETUNREACH); 1655 } 1656 } 1657 NG_FWD_NEW_DATA(error, item, sp->hook, m); 1658 break; 1659 default: 1660 LEAVE(EPFNOSUPPORT); 1661 } 1662 quit: 1663 if (item) 1664 NG_FREE_ITEM(item); 1665 NG_FREE_M(m); 1666 return (error); 1667 } 1668 1669 /* 1670 * Receive data from debug hook and bypass it to ether. 1671 */ 1672 static int 1673 ng_pppoe_rcvdata_debug(hook_p hook, item_p item) 1674 { 1675 node_p node = NG_HOOK_NODE(hook); 1676 const priv_p privp = NG_NODE_PRIVATE(node); 1677 int error; 1678 1679 CTR6(KTR_NET, "%20s: node [%x] (%p) received %p on \"%s\" (%p)", 1680 __func__, node->nd_ID, node, item, hook->hk_name, hook); 1681 1682 NG_FWD_ITEM_HOOK(error, item, privp->ethernet_hook); 1683 privp->packets_out++; 1684 return (error); 1685 } 1686 1687 /* 1688 * Do local shutdown processing.. 1689 * If we are a persistant device, we might refuse to go away, and 1690 * we'd only remove our links and reset ourself. 1691 */ 1692 static int 1693 ng_pppoe_shutdown(node_p node) 1694 { 1695 const priv_p privp = NG_NODE_PRIVATE(node); 1696 int i; 1697 1698 for (i = 0; i < SESSHASHSIZE; i++) 1699 mtx_uninit(&privp->sesshash[i].mtx); 1700 NG_NODE_SET_PRIVATE(node, NULL); 1701 NG_NODE_UNREF(privp->node); 1702 kfree(privp, M_NETGRAPH_PPPOE); 1703 return (0); 1704 } 1705 1706 /* 1707 * Hook disconnection 1708 * 1709 * Clean up all dangling links and information about the session/hook. 1710 * For this type, removal of the last link destroys the node. 1711 */ 1712 static int 1713 ng_pppoe_disconnect(hook_p hook) 1714 { 1715 node_p node = NG_HOOK_NODE(hook); 1716 priv_p privp = NG_NODE_PRIVATE(node); 1717 sessp sp; 1718 1719 if (hook == privp->debug_hook) { 1720 privp->debug_hook = NULL; 1721 } else if (hook == privp->ethernet_hook) { 1722 privp->ethernet_hook = NULL; 1723 if (NG_NODE_IS_VALID(node)) 1724 ng_rmnode_self(node); 1725 } else { 1726 sp = NG_HOOK_PRIVATE(hook); 1727 if (sp->state != PPPOE_SNONE ) { 1728 pppoe_send_event(sp, NGM_PPPOE_CLOSE); 1729 } 1730 /* 1731 * According to the spec, if we are connected, 1732 * we should send a DISC packet if we are shutting down 1733 * a session. 1734 */ 1735 if ((privp->ethernet_hook) 1736 && ((sp->state == PPPOE_CONNECTED) 1737 || (sp->state == PPPOE_NEWCONNECTED))) { 1738 struct mbuf *m; 1739 1740 /* Generate a packet of that type. */ 1741 MGETHDR(m, MB_DONTWAIT, MT_DATA); 1742 if (m == NULL) 1743 log(LOG_NOTICE, "ng_pppoe[%x]: session out of " 1744 "mbufs\n", node->nd_ID); 1745 else { 1746 struct pppoe_full_hdr *wh; 1747 struct pppoe_tag *tag; 1748 int msglen = strlen(SIGNOFF); 1749 int error = 0; 1750 1751 m->m_pkthdr.rcvif = NULL; 1752 m->m_pkthdr.len = m->m_len = sizeof(*wh); 1753 wh = mtod(m, struct pppoe_full_hdr *); 1754 bcopy(&sp->pkt_hdr, wh, sizeof(*wh)); 1755 1756 /* Revert the stored header to DISC/PADT mode. */ 1757 wh->ph.code = PADT_CODE; 1758 /* 1759 * Configure ethertype depending on what 1760 * was used during sessions stage. 1761 */ 1762 if (wh->eh.ether_type == 1763 ETHERTYPE_PPPOE_3COM_SESS) 1764 wh->eh.ether_type = ETHERTYPE_PPPOE_3COM_DISC; 1765 else 1766 wh->eh.ether_type = ETHERTYPE_PPPOE_DISC; 1767 /* 1768 * Add a General error message and adjust 1769 * sizes. 1770 */ 1771 tag = wh->ph.tag; 1772 tag->tag_type = PTT_GEN_ERR; 1773 tag->tag_len = htons((u_int16_t)msglen); 1774 strncpy(tag->tag_data, SIGNOFF, msglen); 1775 m->m_pkthdr.len = (m->m_len += sizeof(*tag) + 1776 msglen); 1777 wh->ph.length = htons(sizeof(*tag) + msglen); 1778 NG_SEND_DATA_ONLY(error, 1779 privp->ethernet_hook, m); 1780 } 1781 } 1782 if (sp->state == PPPOE_LISTENING) 1783 LIST_REMOVE(sp, sessions); 1784 else if (sp->Session_ID) 1785 pppoe_delsession(sp); 1786 /* 1787 * As long as we have somewhere to store the timeout handle, 1788 * we may have a timeout pending.. get rid of it. 1789 */ 1790 if (sp->neg) { 1791 ng_uncallout(&sp->neg->handle, node); 1792 if (sp->neg->m) 1793 m_freem(sp->neg->m); 1794 kfree(sp->neg, M_NETGRAPH_PPPOE); 1795 } 1796 kfree(sp, M_NETGRAPH_PPPOE); 1797 NG_HOOK_SET_PRIVATE(hook, NULL); 1798 } 1799 if ((NG_NODE_NUMHOOKS(node) == 0) && 1800 (NG_NODE_IS_VALID(node))) 1801 ng_rmnode_self(node); 1802 return (0); 1803 } 1804 1805 /* 1806 * Timeouts come here. 1807 */ 1808 static void 1809 pppoe_ticker(node_p node, hook_p hook, void *arg1, int arg2) 1810 { 1811 priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 1812 sessp sp = NG_HOOK_PRIVATE(hook); 1813 negp neg = sp->neg; 1814 struct mbuf *m0 = NULL; 1815 int error = 0; 1816 1817 CTR6(KTR_NET, "%20s: node [%x] (%p) hook \"%s\" (%p) session %d", 1818 __func__, node->nd_ID, node, hook->hk_name, hook, sp->Session_ID); 1819 switch(sp->state) { 1820 /* 1821 * Resend the last packet, using an exponential backoff. 1822 * After a period of time, stop growing the backoff, 1823 * And either leave it, or revert to the start. 1824 */ 1825 case PPPOE_SINIT: 1826 case PPPOE_SREQ: 1827 /* Timeouts on these produce resends. */ 1828 m0 = m_copypacket(sp->neg->m, MB_DONTWAIT); 1829 NG_SEND_DATA_ONLY( error, privp->ethernet_hook, m0); 1830 ng_callout(&neg->handle, node, hook, neg->timeout * hz, 1831 pppoe_ticker, NULL, 0); 1832 if ((neg->timeout <<= 1) > PPPOE_TIMEOUT_LIMIT) { 1833 if (sp->state == PPPOE_SREQ) { 1834 /* Revert to SINIT mode. */ 1835 pppoe_start(sp); 1836 } else { 1837 neg->timeout = PPPOE_TIMEOUT_LIMIT; 1838 } 1839 } 1840 break; 1841 case PPPOE_PRIMED: 1842 case PPPOE_SOFFER: 1843 /* A timeout on these says "give up" */ 1844 ng_rmhook_self(hook); 1845 break; 1846 default: 1847 /* Timeouts have no meaning in other states. */ 1848 log(LOG_NOTICE, "ng_pppoe[%x]: unexpected timeout\n", 1849 node->nd_ID); 1850 } 1851 } 1852 1853 /* 1854 * Parse an incoming packet to see if any tags should be copied to the 1855 * output packet. Don't do any tags that have been handled in the main 1856 * state machine. 1857 */ 1858 static const struct pppoe_tag* 1859 scan_tags(sessp sp, const struct pppoe_hdr* ph) 1860 { 1861 const char *const end = (const char *)next_tag(ph); 1862 const char *ptn; 1863 const struct pppoe_tag *pt = &ph->tag[0]; 1864 1865 /* 1866 * Keep processing tags while a tag header will still fit. 1867 */ 1868 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID); 1869 1870 while((const char*)(pt + 1) <= end) { 1871 /* 1872 * If the tag data would go past the end of the packet, abort. 1873 */ 1874 ptn = (((const char *)(pt + 1)) + ntohs(pt->tag_len)); 1875 if(ptn > end) 1876 return NULL; 1877 1878 switch (pt->tag_type) { 1879 case PTT_RELAY_SID: 1880 insert_tag(sp, pt); 1881 break; 1882 case PTT_EOL: 1883 return NULL; 1884 case PTT_SRV_NAME: 1885 case PTT_AC_NAME: 1886 case PTT_HOST_UNIQ: 1887 case PTT_AC_COOKIE: 1888 case PTT_VENDOR: 1889 case PTT_SRV_ERR: 1890 case PTT_SYS_ERR: 1891 case PTT_GEN_ERR: 1892 break; 1893 } 1894 pt = (const struct pppoe_tag*)ptn; 1895 } 1896 return NULL; 1897 } 1898 1899 static int 1900 pppoe_send_event(sessp sp, enum cmd cmdid) 1901 { 1902 int error; 1903 struct ng_mesg *msg; 1904 struct ngpppoe_sts *sts; 1905 1906 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID); 1907 1908 NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, cmdid, 1909 sizeof(struct ngpppoe_sts), M_WAITOK | M_NULLOK); 1910 if (msg == NULL) 1911 return (ENOMEM); 1912 sts = (struct ngpppoe_sts *)msg->data; 1913 strncpy(sts->hook, NG_HOOK_NAME(sp->hook), NG_HOOKSIZ); 1914 NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0); 1915 return (error); 1916 } 1917