ng_pppoe.c revision 161181
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: head/sys/netgraph/ng_pppoe.c 161181 2006-08-10 11:07:11Z glebius $ 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 61MALLOC_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#define OFFSETOF(s, e) ((char *)&((s *)0)->e - (char *)((s *)0)) 68 69/* 70 * This section contains the netgraph method declarations for the 71 * pppoe node. These methods define the netgraph pppoe 'type'. 72 */ 73 74static ng_constructor_t ng_pppoe_constructor; 75static ng_rcvmsg_t ng_pppoe_rcvmsg; 76static ng_shutdown_t ng_pppoe_shutdown; 77static ng_newhook_t ng_pppoe_newhook; 78static ng_connect_t ng_pppoe_connect; 79static ng_rcvdata_t ng_pppoe_rcvdata; 80static ng_disconnect_t ng_pppoe_disconnect; 81 82/* Parse type for struct ngpppoe_init_data */ 83static const struct ng_parse_struct_field ngpppoe_init_data_type_fields[] 84 = NG_PPPOE_INIT_DATA_TYPE_INFO; 85static const struct ng_parse_type ngpppoe_init_data_state_type = { 86 &ng_parse_struct_type, 87 &ngpppoe_init_data_type_fields 88}; 89 90/* Parse type for struct ngpppoe_sts */ 91static const struct ng_parse_struct_field ng_pppoe_sts_type_fields[] 92 = NG_PPPOE_STS_TYPE_INFO; 93static const struct ng_parse_type ng_pppoe_sts_state_type = { 94 &ng_parse_struct_type, 95 &ng_pppoe_sts_type_fields 96}; 97 98/* List of commands and how to convert arguments to/from ASCII */ 99static const struct ng_cmdlist ng_pppoe_cmds[] = { 100 { 101 NGM_PPPOE_COOKIE, 102 NGM_PPPOE_CONNECT, 103 "pppoe_connect", 104 &ngpppoe_init_data_state_type, 105 NULL 106 }, 107 { 108 NGM_PPPOE_COOKIE, 109 NGM_PPPOE_LISTEN, 110 "pppoe_listen", 111 &ngpppoe_init_data_state_type, 112 NULL 113 }, 114 { 115 NGM_PPPOE_COOKIE, 116 NGM_PPPOE_OFFER, 117 "pppoe_offer", 118 &ngpppoe_init_data_state_type, 119 NULL 120 }, 121 { 122 NGM_PPPOE_COOKIE, 123 NGM_PPPOE_SERVICE, 124 "pppoe_service", 125 &ngpppoe_init_data_state_type, 126 NULL 127 }, 128 { 129 NGM_PPPOE_COOKIE, 130 NGM_PPPOE_SUCCESS, 131 "pppoe_success", 132 &ng_pppoe_sts_state_type, 133 NULL 134 }, 135 { 136 NGM_PPPOE_COOKIE, 137 NGM_PPPOE_FAIL, 138 "pppoe_fail", 139 &ng_pppoe_sts_state_type, 140 NULL 141 }, 142 { 143 NGM_PPPOE_COOKIE, 144 NGM_PPPOE_CLOSE, 145 "pppoe_close", 146 &ng_pppoe_sts_state_type, 147 NULL 148 }, 149 { 150 NGM_PPPOE_COOKIE, 151 NGM_PPPOE_SETMODE, 152 "pppoe_setmode", 153 &ng_parse_string_type, 154 NULL 155 }, 156 { 157 NGM_PPPOE_COOKIE, 158 NGM_PPPOE_GETMODE, 159 "pppoe_getmode", 160 NULL, 161 &ng_parse_string_type 162 }, 163 { 164 NGM_PPPOE_COOKIE, 165 NGM_PPPOE_SETENADDR, 166 "setenaddr", 167 &ng_parse_enaddr_type, 168 NULL 169 }, 170 { 0 } 171}; 172 173/* Netgraph node type descriptor */ 174static struct ng_type typestruct = { 175 .version = NG_ABI_VERSION, 176 .name = NG_PPPOE_NODE_TYPE, 177 .constructor = ng_pppoe_constructor, 178 .rcvmsg = ng_pppoe_rcvmsg, 179 .shutdown = ng_pppoe_shutdown, 180 .newhook = ng_pppoe_newhook, 181 .connect = ng_pppoe_connect, 182 .rcvdata = ng_pppoe_rcvdata, 183 .disconnect = ng_pppoe_disconnect, 184 .cmdlist = ng_pppoe_cmds, 185}; 186NETGRAPH_INIT(pppoe, &typestruct); 187 188/* 189 * States for the session state machine. 190 * These have no meaning if there is no hook attached yet. 191 */ 192enum state { 193 PPPOE_SNONE=0, /* [both] Initial state */ 194 PPPOE_LISTENING, /* [Daemon] Listening for discover initiation pkt */ 195 PPPOE_SINIT, /* [Client] Sent discovery initiation */ 196 PPPOE_PRIMED, /* [Server] Awaiting PADI from daemon */ 197 PPPOE_SOFFER, /* [Server] Sent offer message (got PADI)*/ 198 PPPOE_SREQ, /* [Client] Sent a Request */ 199 PPPOE_NEWCONNECTED, /* [Server] Connection established, No data received */ 200 PPPOE_CONNECTED, /* [Both] Connection established, Data received */ 201 PPPOE_DEAD /* [Both] */ 202}; 203 204#define NUMTAGS 20 /* number of tags we are set up to work with */ 205 206/* 207 * Information we store for each hook on each node for negotiating the 208 * session. The mbuf and cluster are freed once negotiation has completed. 209 * The whole negotiation block is then discarded. 210 */ 211 212struct sess_neg { 213 struct mbuf *m; /* holds cluster with last sent packet */ 214 union packet *pkt; /* points within the above cluster */ 215 struct callout handle; /* see timeout(9) */ 216 u_int timeout; /* 0,1,2,4,8,16 etc. seconds */ 217 u_int numtags; 218 const struct pppoe_tag *tags[NUMTAGS]; 219 u_int service_len; 220 u_int ac_name_len; 221 222 struct datatag service; 223 struct datatag ac_name; 224}; 225typedef struct sess_neg *negp; 226 227/* 228 * Session information that is needed after connection. 229 */ 230struct sess_con { 231 hook_p hook; 232 uint16_t Session_ID; 233 enum state state; 234 ng_ID_t creator; /* who to notify */ 235 struct pppoe_full_hdr pkt_hdr; /* used when connected */ 236 negp neg; /* used when negotiating */ 237}; 238typedef struct sess_con *sessp; 239 240#define NG_PPPOE_SESSION_NODE(sp) NG_HOOK_NODE(sp->hook) 241 242/* 243 * Information we store for each node 244 */ 245struct PPPoE { 246 node_p node; /* back pointer to node */ 247 hook_p ethernet_hook; 248 hook_p debug_hook; 249 u_int packets_in; /* packets in from ethernet */ 250 u_int packets_out; /* packets out towards ethernet */ 251 uint32_t flags; 252#define COMPAT_3COM 0x00000001 253#define COMPAT_DLINK 0x00000002 254 struct ether_header eh; 255}; 256typedef struct PPPoE *priv_p; 257 258union uniq { 259 char bytes[sizeof(void *)]; 260 void *pointer; 261}; 262 263#define LEAVE(x) do { error = x; goto quit; } while(0) 264static void pppoe_start(sessp sp); 265static void ng_pppoe_sendpacket(sessp sp); 266static void pppoe_ticker(node_p node, hook_p hook, void *arg1, int arg2); 267static const struct pppoe_tag *scan_tags(sessp sp, 268 const struct pppoe_hdr* ph); 269static int pppoe_send_event(sessp sp, enum cmd cmdid); 270 271/************************************************************************* 272 * Some basic utilities from the Linux version with author's permission.* 273 * Author: Michal Ostrowski <mostrows@styx.uwaterloo.ca> * 274 ************************************************************************/ 275 276/* 277 * Generate a new session id 278 * XXX find out the FreeBSD locking scheme. 279 */ 280static uint16_t 281get_new_sid(node_p node) 282{ 283 priv_p privp = NG_NODE_PRIVATE(node); 284 static int pppoe_sid = 10; 285 sessp sp; 286 hook_p hook; 287 uint16_t val; 288 289restart: 290 val = pppoe_sid++; 291 /* 292 * Spec says 0xFFFF is reserved. 293 * Also don't use 0x0000 294 */ 295 if (val == 0xffff) { 296 pppoe_sid = 20; 297 goto restart; 298 } 299 300 /* Check it isn't already in use. */ 301 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) { 302 /* Don't check special hooks. */ 303 if ((NG_HOOK_PRIVATE(hook) == &privp->debug_hook) 304 || (NG_HOOK_PRIVATE(hook) == &privp->ethernet_hook)) 305 continue; 306 sp = NG_HOOK_PRIVATE(hook); 307 if (sp->Session_ID == val) 308 goto restart; 309 } 310 311 CTR2(KTR_NET, "%20s: new sid %d", __func__, val); 312 313 return (val); 314} 315 316 317/* 318 * Return the location where the next tag can be put 319 */ 320static __inline const struct pppoe_tag* 321next_tag(const struct pppoe_hdr* ph) 322{ 323 return (const struct pppoe_tag*)(((const char*)&ph->tag[0]) 324 + ntohs(ph->length)); 325} 326 327/* 328 * Look for a tag of a specific type. 329 * Don't trust any length the other end says, 330 * but assume we already sanity checked ph->length. 331 */ 332static const struct pppoe_tag* 333get_tag(const struct pppoe_hdr* ph, uint16_t idx) 334{ 335 const char *const end = (const char *)next_tag(ph); 336 const struct pppoe_tag *pt = &ph->tag[0]; 337 const char *ptn; 338 339 /* 340 * Keep processing tags while a tag header will still fit. 341 */ 342 while((const char*)(pt + 1) <= end) { 343 /* 344 * If the tag data would go past the end of the packet, abort. 345 */ 346 ptn = (((const char *)(pt + 1)) + ntohs(pt->tag_len)); 347 if (ptn > end) { 348 CTR2(KTR_NET, "%20s: invalid length for tag %d", 349 __func__, idx); 350 return (NULL); 351 } 352 if (pt->tag_type == idx) { 353 CTR2(KTR_NET, "%20s: found tag %d", __func__, idx); 354 return (pt); 355 } 356 357 pt = (const struct pppoe_tag*)ptn; 358 } 359 360 CTR2(KTR_NET, "%20s: not found tag %d", __func__, idx); 361 return (NULL); 362} 363 364/************************************************************************** 365 * Inlines to initialise or add tags to a session's tag list. 366 **************************************************************************/ 367/* 368 * Initialise the session's tag list. 369 */ 370static void 371init_tags(sessp sp) 372{ 373 KASSERT(sp->neg != NULL, ("%s: no neg", __func__)); 374 sp->neg->numtags = 0; 375} 376 377static void 378insert_tag(sessp sp, const struct pppoe_tag *tp) 379{ 380 negp neg = sp->neg; 381 int i; 382 383 KASSERT(neg != NULL, ("%s: no neg", __func__)); 384 if ((i = neg->numtags++) < NUMTAGS) { 385 neg->tags[i] = tp; 386 } else { 387 log(LOG_NOTICE, "ng_pppoe: asked to add too many tags to " 388 "packet\n"); 389 neg->numtags--; 390 } 391} 392 393/* 394 * Make up a packet, using the tags filled out for the session. 395 * 396 * Assume that the actual pppoe header and ethernet header 397 * are filled out externally to this routine. 398 * Also assume that neg->wh points to the correct 399 * location at the front of the buffer space. 400 */ 401static void 402make_packet(sessp sp) { 403 struct pppoe_full_hdr *wh = &sp->neg->pkt->pkt_header; 404 const struct pppoe_tag **tag; 405 char *dp; 406 int count; 407 int tlen; 408 uint16_t length = 0; 409 410 KASSERT((sp->neg != NULL) && (sp->neg->m != NULL), 411 ("%s: called from wrong state", __func__)); 412 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID); 413 414 dp = (char *)wh->ph.tag; 415 for (count = 0, tag = sp->neg->tags; 416 ((count < sp->neg->numtags) && (count < NUMTAGS)); 417 tag++, count++) { 418 tlen = ntohs((*tag)->tag_len) + sizeof(**tag); 419 if ((length + tlen) > (ETHER_MAX_LEN - 4 - sizeof(*wh))) { 420 log(LOG_NOTICE, "ng_pppoe: tags too long\n"); 421 sp->neg->numtags = count; 422 break; /* XXX chop off what's too long */ 423 } 424 bcopy(*tag, (char *)dp, tlen); 425 length += tlen; 426 dp += tlen; 427 } 428 wh->ph.length = htons(length); 429 sp->neg->m->m_len = length + sizeof(*wh); 430 sp->neg->m->m_pkthdr.len = length + sizeof(*wh); 431} 432 433/************************************************************************** 434 * Routines to match a service. * 435 **************************************************************************/ 436 437/* 438 * Find a hook that has a service string that matches that 439 * we are seeking. For now use a simple string. 440 * In the future we may need something like regexp(). 441 * 442 * Null string is a wildcard (ANY service), according to RFC2516. 443 * And historical FreeBSD wildcard is also "*". 444 */ 445 446static hook_p 447pppoe_match_svc(node_p node, const struct pppoe_tag *tag) 448{ 449 priv_p privp = NG_NODE_PRIVATE(node); 450 hook_p hook; 451 452 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) { 453 sessp sp = NG_HOOK_PRIVATE(hook); 454 negp neg; 455 456 /* Skip any hook that is debug or ethernet. */ 457 if ((NG_HOOK_PRIVATE(hook) == &privp->debug_hook) || 458 (NG_HOOK_PRIVATE(hook) == &privp->ethernet_hook)) 459 continue; 460 461 /* Skip any sessions which are not in LISTEN mode. */ 462 if (sp->state != PPPOE_LISTENING) 463 continue; 464 465 neg = sp->neg; 466 467 /* Empty Service-Name matches any service. */ 468 if (neg->service_len == 0) 469 break; 470 471 /* Special case for a blank or "*" service name (wildcard). */ 472 if (neg->service_len == 1 && neg->service.data[0] == '*') 473 break; 474 475 /* If the lengths don't match, that aint it. */ 476 if (neg->service_len != ntohs(tag->tag_len)) 477 continue; 478 479 if (strncmp(tag->tag_data, neg->service.data, 480 ntohs(tag->tag_len)) == 0) 481 break; 482 } 483 CTR3(KTR_NET, "%20s: matched %p for %s", __func__, hook, tag->tag_data); 484 485 return (hook); 486} 487 488/* 489 * Broadcast the PADI packet in m0 to all listening hooks. 490 * This routine is called when a PADI with empty Service-Name 491 * tag is received. Client should receive PADOs with all 492 * available services. 493 */ 494static int 495pppoe_broadcast_padi(node_p node, struct mbuf *m0) 496{ 497 priv_p privp = NG_NODE_PRIVATE(node); 498 hook_p hook; 499 int error = 0; 500 501 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) { 502 sessp sp = NG_HOOK_PRIVATE(hook); 503 struct mbuf *m; 504 505 /* 506 * Go through all listening hooks and 507 * broadcast the PADI packet up there 508 */ 509 if ((NG_HOOK_PRIVATE(hook) == &privp->debug_hook) || 510 (NG_HOOK_PRIVATE(hook) == &privp->ethernet_hook)) 511 continue; 512 513 if (sp->state != PPPOE_LISTENING) 514 continue; 515 516 m = m_dup(m0, M_DONTWAIT); 517 if (m == NULL) 518 return (ENOMEM); 519 NG_SEND_DATA_ONLY(error, hook, m); 520 if (error) 521 return (error); 522 } 523 524 return (0); 525} 526 527/* 528 * Find a hook, which name equals to given service. 529 */ 530static hook_p 531pppoe_find_svc(node_p node, const char *svc_name, int svc_len) 532{ 533 priv_p privp = NG_NODE_PRIVATE(node); 534 hook_p hook; 535 536 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) { 537 sessp sp = NG_HOOK_PRIVATE(hook); 538 negp neg; 539 540 /* Skip any hook that is debug or ethernet. */ 541 if ((NG_HOOK_PRIVATE(hook) == &privp->debug_hook) || 542 (NG_HOOK_PRIVATE(hook) == &privp->ethernet_hook)) 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 * Routine to find a particular session that matches an incoming packet. * 561 **************************************************************************/ 562static hook_p 563pppoe_findsession(node_p node, const struct pppoe_full_hdr *wh) 564{ 565 priv_p privp = NG_NODE_PRIVATE(node); 566 sessp sp = NULL; 567 hook_p hook = NULL; 568 uint16_t session = ntohs(wh->ph.sid); 569 570 /* 571 * Find matching peer/session combination. 572 */ 573 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) { 574 /* don't check special hooks */ 575 if ((NG_HOOK_PRIVATE(hook) == &privp->debug_hook) 576 || (NG_HOOK_PRIVATE(hook) == &privp->ethernet_hook)) { 577 continue; 578 } 579 sp = NG_HOOK_PRIVATE(hook); 580 if ( ( (sp->state == PPPOE_CONNECTED) 581 || (sp->state == PPPOE_NEWCONNECTED) ) 582 && (sp->Session_ID == session) 583 && (bcmp(sp->pkt_hdr.eh.ether_dhost, 584 wh->eh.ether_shost, 585 ETHER_ADDR_LEN)) == 0) { 586 break; 587 } 588 } 589 CTR3(KTR_NET, "%20s: matched %p for %d", __func__, hook, session); 590 591 return (hook); 592} 593 594static hook_p 595pppoe_finduniq(node_p node, const struct pppoe_tag *tag) 596{ 597 priv_p privp = NG_NODE_PRIVATE(node); 598 hook_p hook = NULL; 599 union uniq uniq; 600 601 bcopy(tag->tag_data, uniq.bytes, sizeof(void *)); 602 /* Cycle through all known hooks. */ 603 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) { 604 /* Don't check special hooks. */ 605 if ((NG_HOOK_PRIVATE(hook) == &privp->debug_hook) 606 || (NG_HOOK_PRIVATE(hook) == &privp->ethernet_hook)) 607 continue; 608 if (uniq.pointer == NG_HOOK_PRIVATE(hook)) 609 break; 610 } 611 CTR3(KTR_NET, "%20s: matched %p for %p", __func__, hook, uniq.pointer); 612 613 return (hook); 614} 615 616/************************************************************************** 617 * Start of Netgraph entrypoints. * 618 **************************************************************************/ 619 620/* 621 * Allocate the private data structure and link it with node. 622 */ 623static int 624ng_pppoe_constructor(node_p node) 625{ 626 priv_p privp; 627 628 /* Initialize private descriptor. */ 629 privp = malloc(sizeof(*privp), M_NETGRAPH_PPPOE, M_NOWAIT | M_ZERO); 630 if (privp == NULL) 631 return (ENOMEM); 632 633 /* Link structs together; this counts as our one reference to *node. */ 634 NG_NODE_SET_PRIVATE(node, privp); 635 privp->node = node; 636 637 /* Initialize to standard mode. */ 638 memset(&privp->eh.ether_dhost, 0xff, ETHER_ADDR_LEN); 639 privp->eh.ether_type = ETHERTYPE_PPPOE_DISC; 640 641 CTR3(KTR_NET, "%20s: created node [%x] (%p)", 642 __func__, node->nd_ID, node); 643 644 return (0); 645} 646 647/* 648 * Give our ok for a hook to be added... 649 * point the hook's private info to the hook structure. 650 * 651 * The following hook names are special: 652 * "ethernet": the hook that should be connected to a NIC. 653 * "debug": copies of data sent out here (when I write the code). 654 * All other hook names need only be unique. (the framework checks this). 655 */ 656static int 657ng_pppoe_newhook(node_p node, hook_p hook, const char *name) 658{ 659 const priv_p privp = NG_NODE_PRIVATE(node); 660 sessp sp; 661 662 if (strcmp(name, NG_PPPOE_HOOK_ETHERNET) == 0) { 663 privp->ethernet_hook = hook; 664 NG_HOOK_SET_PRIVATE(hook, &privp->ethernet_hook); 665 } else if (strcmp(name, NG_PPPOE_HOOK_DEBUG) == 0) { 666 privp->debug_hook = hook; 667 NG_HOOK_SET_PRIVATE(hook, &privp->debug_hook); 668 } else { 669 /* 670 * Any other unique name is OK. 671 * The infrastructure has already checked that it's unique, 672 * so just allocate it and hook it in. 673 */ 674 sp = malloc(sizeof(*sp), M_NETGRAPH_PPPOE, M_NOWAIT | M_ZERO); 675 if (sp == NULL) 676 return (ENOMEM); 677 678 NG_HOOK_SET_PRIVATE(hook, sp); 679 sp->hook = hook; 680 } 681 CTR5(KTR_NET, "%20s: node [%x] (%p) connected hook %s (%p)", 682 __func__, node->nd_ID, node, name, hook); 683 684 return(0); 685} 686 687/* 688 * Hook has been added successfully. Request the MAC address of 689 * the underlying Ethernet node. 690 */ 691static int 692ng_pppoe_connect(hook_p hook) 693{ 694 const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 695 struct ng_mesg *msg; 696 int error; 697 698 if (hook != privp->ethernet_hook) 699 return (0); 700 701 /* 702 * If this is Ethernet hook, then request MAC address 703 * from our downstream. 704 */ 705 NG_MKMESSAGE(msg, NGM_ETHER_COOKIE, NGM_ETHER_GET_ENADDR, 0, M_NOWAIT); 706 if (msg == NULL) 707 return (ENOBUFS); 708 709 /* 710 * Our hook and peer hook have HK_INVALID flag set, 711 * so we can't use NG_SEND_MSG_HOOK() macro here. 712 */ 713 NG_SEND_MSG_ID(error, privp->node, msg, 714 NG_NODE_ID(NG_PEER_NODE(privp->ethernet_hook)), 715 NG_NODE_ID(privp->node)); 716 717 return (error); 718} 719/* 720 * Get a netgraph control message. 721 * Check it is one we understand. If needed, send a response. 722 * We sometimes save the address for an async action later. 723 * Always free the message. 724 */ 725static int 726ng_pppoe_rcvmsg(node_p node, item_p item, hook_p lasthook) 727{ 728 priv_p privp = NG_NODE_PRIVATE(node); 729 struct ngpppoe_init_data *ourmsg = NULL; 730 struct ng_mesg *resp = NULL; 731 int error = 0; 732 hook_p hook = NULL; 733 sessp sp = NULL; 734 negp neg = NULL; 735 struct ng_mesg *msg; 736 737 NGI_GET_MSG(item, msg); 738 CTR5(KTR_NET, "%20s: node [%x] (%p) got message %d with cookie %d", 739 __func__, node->nd_ID, node, msg->header.cmd, 740 msg->header.typecookie); 741 742 /* Deal with message according to cookie and command. */ 743 switch (msg->header.typecookie) { 744 case NGM_PPPOE_COOKIE: 745 switch (msg->header.cmd) { 746 case NGM_PPPOE_CONNECT: 747 case NGM_PPPOE_LISTEN: 748 case NGM_PPPOE_OFFER: 749 case NGM_PPPOE_SERVICE: 750 ourmsg = (struct ngpppoe_init_data *)msg->data; 751 if (msg->header.arglen < sizeof(*ourmsg)) { 752 log(LOG_ERR, "ng_pppoe[%x]: init data too " 753 "small\n", node->nd_ID); 754 LEAVE(EMSGSIZE); 755 } 756 if (msg->header.arglen - sizeof(*ourmsg) > 757 PPPOE_SERVICE_NAME_SIZE) { 758 log(LOG_ERR, "ng_pppoe[%x]: service name " 759 "too big\n", node->nd_ID); 760 LEAVE(EMSGSIZE); 761 } 762 if (msg->header.arglen - sizeof(*ourmsg) < 763 ourmsg->data_len) { 764 log(LOG_ERR, "ng_pppoe[%x]: init data has bad " 765 "length, %d should be %zd\n", node->nd_ID, 766 ourmsg->data_len, 767 msg->header.arglen - sizeof (*ourmsg)); 768 LEAVE(EMSGSIZE); 769 } 770 771 /* Make sure strcmp will terminate safely. */ 772 ourmsg->hook[sizeof(ourmsg->hook) - 1] = '\0'; 773 774 /* Cycle through all known hooks. */ 775 LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) { 776 if (NG_HOOK_NAME(hook) && 777 strcmp(NG_HOOK_NAME(hook), ourmsg->hook) == 778 0) 779 break; 780 } 781 if (hook == NULL) 782 LEAVE(ENOENT); 783 784 if ((NG_HOOK_PRIVATE(hook) == &privp->debug_hook) || 785 (NG_HOOK_PRIVATE(hook) == &privp->ethernet_hook)) 786 LEAVE(EINVAL); 787 788 sp = NG_HOOK_PRIVATE(hook); 789 790 if (msg->header.cmd == NGM_PPPOE_LISTEN) { 791 /* 792 * Ensure we aren't already listening for this 793 * service. 794 */ 795 if (pppoe_find_svc(node, ourmsg->data, 796 ourmsg->data_len) != NULL) 797 LEAVE(EEXIST); 798 } 799 800 /* 801 * PPPOE_SERVICE advertisments are set up 802 * on sessions that are in PRIMED state. 803 */ 804 if (msg->header.cmd == NGM_PPPOE_SERVICE) 805 break; 806 807 if (sp->state != PPPOE_SNONE) { 808 log(LOG_NOTICE, "ng_pppoe[%x]: Session already " 809 "active\n", node->nd_ID); 810 LEAVE(EISCONN); 811 } 812 813 /* 814 * Set up prototype header. 815 */ 816 neg = malloc(sizeof(*neg), M_NETGRAPH_PPPOE, 817 M_NOWAIT | M_ZERO); 818 819 if (neg == NULL) 820 LEAVE(ENOMEM); 821 822 neg->m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 823 if (neg->m == NULL) { 824 free(neg, M_NETGRAPH_PPPOE); 825 LEAVE(ENOBUFS); 826 } 827 neg->m->m_pkthdr.rcvif = NULL; 828 sp->neg = neg; 829 ng_callout_init(&neg->handle); 830 neg->m->m_len = sizeof(struct pppoe_full_hdr); 831 neg->pkt = mtod(neg->m, union packet*); 832 memcpy((void *)&neg->pkt->pkt_header.eh, 833 &privp->eh, sizeof(struct ether_header)); 834 neg->pkt->pkt_header.ph.ver = 0x1; 835 neg->pkt->pkt_header.ph.type = 0x1; 836 neg->pkt->pkt_header.ph.sid = 0x0000; 837 neg->timeout = 0; 838 839 sp->creator = NGI_RETADDR(item); 840 } 841 switch (msg->header.cmd) { 842 case NGM_PPPOE_GET_STATUS: 843 { 844 struct ngpppoestat *stats; 845 846 NG_MKRESPONSE(resp, msg, sizeof(*stats), M_NOWAIT); 847 if (!resp) 848 LEAVE(ENOMEM); 849 850 stats = (struct ngpppoestat *) resp->data; 851 stats->packets_in = privp->packets_in; 852 stats->packets_out = privp->packets_out; 853 break; 854 } 855 case NGM_PPPOE_CONNECT: 856 /* 857 * Check the hook exists and is Uninitialised. 858 * Send a PADI request, and start the timeout logic. 859 * Store the originator of this message so we can send 860 * a success of fail message to them later. 861 * Move the session to SINIT. 862 * Set up the session to the correct state and 863 * start it. 864 */ 865 neg->service.hdr.tag_type = PTT_SRV_NAME; 866 neg->service.hdr.tag_len = 867 htons((uint16_t)ourmsg->data_len); 868 if (ourmsg->data_len) 869 bcopy(ourmsg->data, neg->service.data, 870 ourmsg->data_len); 871 neg->service_len = ourmsg->data_len; 872 pppoe_start(sp); 873 break; 874 case NGM_PPPOE_LISTEN: 875 /* 876 * Check the hook exists and is Uninitialised. 877 * Install the service matching string. 878 * Store the originator of this message so we can send 879 * a success of fail message to them later. 880 * Move the hook to 'LISTENING' 881 */ 882 neg->service.hdr.tag_type = PTT_SRV_NAME; 883 neg->service.hdr.tag_len = 884 htons((uint16_t)ourmsg->data_len); 885 886 if (ourmsg->data_len) 887 bcopy(ourmsg->data, neg->service.data, 888 ourmsg->data_len); 889 neg->service_len = ourmsg->data_len; 890 neg->pkt->pkt_header.ph.code = PADT_CODE; 891 /* 892 * Wait for PADI packet coming from Ethernet. 893 */ 894 sp->state = PPPOE_LISTENING; 895 break; 896 case NGM_PPPOE_OFFER: 897 /* 898 * Check the hook exists and is Uninitialised. 899 * Store the originator of this message so we can send 900 * a success of fail message to them later. 901 * Store the AC-Name given and go to PRIMED. 902 */ 903 neg->ac_name.hdr.tag_type = PTT_AC_NAME; 904 neg->ac_name.hdr.tag_len = 905 htons((uint16_t)ourmsg->data_len); 906 if (ourmsg->data_len) 907 bcopy(ourmsg->data, neg->ac_name.data, 908 ourmsg->data_len); 909 neg->ac_name_len = ourmsg->data_len; 910 neg->pkt->pkt_header.ph.code = PADO_CODE; 911 /* 912 * Wait for PADI packet coming from hook. 913 */ 914 sp->state = PPPOE_PRIMED; 915 break; 916 case NGM_PPPOE_SERVICE: 917 /* 918 * Check the session is primed. 919 * for now just allow ONE service to be advertised. 920 * If you do it twice you just overwrite. 921 */ 922 if (sp->state != PPPOE_PRIMED) { 923 log(LOG_NOTICE, "ng_pppoe[%x]: session not " 924 "primed\n", node->nd_ID); 925 LEAVE(EISCONN); 926 } 927 neg = sp->neg; 928 neg->service.hdr.tag_type = PTT_SRV_NAME; 929 neg->service.hdr.tag_len = 930 htons((uint16_t)ourmsg->data_len); 931 932 if (ourmsg->data_len) 933 bcopy(ourmsg->data, neg->service.data, 934 ourmsg->data_len); 935 neg->service_len = ourmsg->data_len; 936 break; 937 case NGM_PPPOE_SETMODE: 938 { 939 char *s; 940 size_t len; 941 942 if (msg->header.arglen == 0) 943 LEAVE(EINVAL); 944 945 s = (char *)msg->data; 946 len = msg->header.arglen - 1; 947 948 /* Search for matching mode string. */ 949 if (len == strlen(NG_PPPOE_STANDARD) && 950 (strncmp(NG_PPPOE_STANDARD, s, len) == 0)) { 951 privp->flags = 0; 952 privp->eh.ether_type = ETHERTYPE_PPPOE_DISC; 953 break; 954 } 955 if (len == strlen(NG_PPPOE_3COM) && 956 (strncmp(NG_PPPOE_3COM, s, len) == 0)) { 957 privp->flags |= COMPAT_3COM; 958 privp->eh.ether_type = 959 ETHERTYPE_PPPOE_3COM_DISC; 960 break; 961 } 962 if (len == strlen(NG_PPPOE_DLINK) && 963 (strncmp(NG_PPPOE_DLINK, s, len) == 0)) { 964 privp->flags |= COMPAT_DLINK; 965 break; 966 } 967 error = EINVAL; 968 break; 969 } 970 case NGM_PPPOE_GETMODE: 971 { 972 char *s; 973 size_t len = 0; 974 975 if (privp->flags == 0) 976 len += strlen(NG_PPPOE_STANDARD) + 1; 977 if (privp->flags & COMPAT_3COM) 978 len += strlen(NG_PPPOE_3COM) + 1; 979 if (privp->flags & COMPAT_DLINK) 980 len += strlen(NG_PPPOE_DLINK) + 1; 981 982 NG_MKRESPONSE(resp, msg, len, M_NOWAIT); 983 if (resp == NULL) 984 LEAVE(ENOMEM); 985 986 s = (char *)resp->data; 987 if (privp->flags == 0) { 988 len = strlen(NG_PPPOE_STANDARD); 989 strlcpy(s, NG_PPPOE_STANDARD, len + 1); 990 break; 991 } 992 if (privp->flags & COMPAT_3COM) { 993 len = strlen(NG_PPPOE_3COM); 994 strlcpy(s, NG_PPPOE_3COM, len + 1); 995 s += len; 996 } 997 if (privp->flags & COMPAT_DLINK) { 998 if (s != resp->data) 999 *s++ = '|'; 1000 len = strlen(NG_PPPOE_DLINK); 1001 strlcpy(s, NG_PPPOE_DLINK, len + 1); 1002 } 1003 break; 1004 } 1005 case NGM_PPPOE_SETENADDR: 1006 if (msg->header.arglen != ETHER_ADDR_LEN) 1007 LEAVE(EINVAL); 1008 bcopy(msg->data, &privp->eh.ether_shost, 1009 ETHER_ADDR_LEN); 1010 break; 1011 default: 1012 LEAVE(EINVAL); 1013 } 1014 break; 1015 case NGM_ETHER_COOKIE: 1016 if (!(msg->header.flags & NGF_RESP)) 1017 LEAVE(EINVAL); 1018 switch (msg->header.cmd) { 1019 case NGM_ETHER_GET_ENADDR: 1020 if (msg->header.arglen != ETHER_ADDR_LEN) 1021 LEAVE(EINVAL); 1022 bcopy(msg->data, &privp->eh.ether_shost, 1023 ETHER_ADDR_LEN); 1024 break; 1025 default: 1026 LEAVE(EINVAL); 1027 } 1028 break; 1029 default: 1030 LEAVE(EINVAL); 1031 } 1032 1033 /* Take care of synchronous response, if any. */ 1034quit: 1035 CTR2(KTR_NET, "%20s: returning %d", __func__, error); 1036 NG_RESPOND_MSG(error, node, item, resp); 1037 /* Free the message and return. */ 1038 NG_FREE_MSG(msg); 1039 return(error); 1040} 1041 1042/* 1043 * Start a client into the first state. A separate function because 1044 * it can be needed if the negotiation times out. 1045 */ 1046static void 1047pppoe_start(sessp sp) 1048{ 1049 priv_p privp = NG_NODE_PRIVATE(NG_PPPOE_SESSION_NODE(sp)); 1050 struct { 1051 struct pppoe_tag hdr; 1052 union uniq data; 1053 } __packed uniqtag; 1054 1055 /* 1056 * Kick the state machine into starting up. 1057 */ 1058 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID); 1059 sp->state = PPPOE_SINIT; 1060 /* 1061 * Reset the packet header to broadcast. Since we are 1062 * in a client mode use configured ethertype. 1063 */ 1064 memcpy((void *)&sp->neg->pkt->pkt_header.eh, &privp->eh, 1065 sizeof(struct ether_header)); 1066 sp->neg->pkt->pkt_header.ph.code = PADI_CODE; 1067 uniqtag.hdr.tag_type = PTT_HOST_UNIQ; 1068 uniqtag.hdr.tag_len = htons((u_int16_t)sizeof(uniqtag.data)); 1069 uniqtag.data.pointer = sp; 1070 init_tags(sp); 1071 insert_tag(sp, &uniqtag.hdr); 1072 insert_tag(sp, &sp->neg->service.hdr); 1073 make_packet(sp); 1074 ng_pppoe_sendpacket(sp); 1075} 1076 1077static int 1078send_acname(sessp sp, const struct pppoe_tag *tag) 1079{ 1080 int error, tlen; 1081 struct ng_mesg *msg; 1082 struct ngpppoe_sts *sts; 1083 1084 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID); 1085 1086 NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, NGM_PPPOE_ACNAME, 1087 sizeof(struct ngpppoe_sts), M_NOWAIT); 1088 if (msg == NULL) 1089 return (ENOMEM); 1090 1091 sts = (struct ngpppoe_sts *)msg->data; 1092 tlen = min(NG_HOOKSIZ - 1, ntohs(tag->tag_len)); 1093 strncpy(sts->hook, tag->tag_data, tlen); 1094 sts->hook[tlen] = '\0'; 1095 NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0); 1096 1097 return (error); 1098} 1099 1100static int 1101send_sessionid(sessp sp) 1102{ 1103 int error; 1104 struct ng_mesg *msg; 1105 1106 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID); 1107 1108 NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, NGM_PPPOE_SESSIONID, 1109 sizeof(uint16_t), M_NOWAIT); 1110 if (msg == NULL) 1111 return (ENOMEM); 1112 1113 *(uint16_t *)msg->data = sp->Session_ID; 1114 NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0); 1115 1116 return (error); 1117} 1118 1119/* 1120 * Receive data, and do something with it. 1121 * The caller will never free m, so if we use up this data 1122 * or abort we must free it. 1123 */ 1124static int 1125ng_pppoe_rcvdata(hook_p hook, item_p item) 1126{ 1127 node_p node = NG_HOOK_NODE(hook); 1128 const priv_p privp = NG_NODE_PRIVATE(node); 1129 sessp sp = NG_HOOK_PRIVATE(hook); 1130 const struct pppoe_tag *utag = NULL, *tag = NULL; 1131 const struct pppoe_full_hdr *wh; 1132 const struct pppoe_hdr *ph; 1133 negp neg = NULL; 1134 struct mbuf *m; 1135 hook_p sendhook; 1136 int error = 0; 1137 uint16_t session; 1138 uint16_t length; 1139 uint8_t code; 1140 struct { 1141 struct pppoe_tag hdr; 1142 union uniq data; 1143 } __packed uniqtag; 1144 1145 CTR6(KTR_NET, "%20s: node [%x] (%p) received %p on \"%s\" (%p)", 1146 __func__, node->nd_ID, node, item, hook->hk_name, hook); 1147 1148 NGI_GET_M(item, m); 1149 if (NG_HOOK_PRIVATE(hook) == &privp->debug_hook) { 1150 /* 1151 * Data from the debug hook gets sent without modification 1152 * straight to the ethernet. 1153 */ 1154 NG_FWD_ITEM_HOOK( error, item, privp->ethernet_hook); 1155 privp->packets_out++; 1156 } else if (NG_HOOK_PRIVATE(hook) == &privp->ethernet_hook) { 1157 /* 1158 * Incoming data. 1159 * Dig out various fields from the packet. 1160 * Use them to decide where to send it. 1161 */ 1162 1163 privp->packets_in++; 1164 if( m->m_len < sizeof(*wh)) { 1165 m = m_pullup(m, sizeof(*wh)); /* Checks length */ 1166 if (m == NULL) { 1167 log(LOG_NOTICE, "ng_pppoe[%x]: couldn't " 1168 "m_pullup(wh)\n", node->nd_ID); 1169 LEAVE(ENOBUFS); 1170 } 1171 } 1172 wh = mtod(m, struct pppoe_full_hdr *); 1173 length = ntohs(wh->ph.length); 1174 switch(wh->eh.ether_type) { 1175 case ETHERTYPE_PPPOE_3COM_DISC: /* fall through */ 1176 case ETHERTYPE_PPPOE_DISC: 1177 /* 1178 * We need to try to make sure that the tag area 1179 * is contiguous, or we could wander off the end 1180 * of a buffer and make a mess. 1181 * (Linux wouldn't have this problem). 1182 */ 1183 if (m->m_pkthdr.len <= MHLEN) { 1184 if( m->m_len < m->m_pkthdr.len) { 1185 m = m_pullup(m, m->m_pkthdr.len); 1186 if (m == NULL) { 1187 log(LOG_NOTICE, "ng_pppoe[%x]: " 1188 "couldn't " 1189 "m_pullup(pkthdr)\n", 1190 node->nd_ID); 1191 LEAVE(ENOBUFS); 1192 } 1193 } 1194 } 1195 if (m->m_len != m->m_pkthdr.len) { 1196 /* 1197 * It's not all in one piece. 1198 * We need to do extra work. 1199 * Put it into a cluster. 1200 */ 1201 struct mbuf *n; 1202 n = m_dup(m, M_DONTWAIT); 1203 m_freem(m); 1204 m = n; 1205 if (m) { 1206 /* just check we got a cluster */ 1207 if (m->m_len != m->m_pkthdr.len) { 1208 m_freem(m); 1209 m = NULL; 1210 } 1211 } 1212 if (m == NULL) { 1213 log(LOG_NOTICE, "ng_pppoe[%x]: packet " 1214 "fragmented\n", node->nd_ID); 1215 LEAVE(EMSGSIZE); 1216 } 1217 } 1218 wh = mtod(m, struct pppoe_full_hdr *); 1219 length = ntohs(wh->ph.length); 1220 ph = &wh->ph; 1221 session = ntohs(wh->ph.sid); 1222 code = wh->ph.code; 1223 1224 switch(code) { 1225 case PADI_CODE: 1226 /* 1227 * We are a server: 1228 * Look for a hook with the required service 1229 * and send the ENTIRE packet up there. 1230 * It should come back to a new hook in 1231 * PRIMED state. Look there for further 1232 * processing. 1233 */ 1234 tag = get_tag(ph, PTT_SRV_NAME); 1235 if (tag == NULL) { 1236 CTR1(KTR_NET, 1237 "%20s: PADI w/o Service-Name", 1238 __func__); 1239 LEAVE(ENETUNREACH); 1240 } 1241 1242 /* 1243 * First, try to match Service-Name 1244 * against our listening hooks. If 1245 * no success and we are in D-Link 1246 * compat mode and Service-Name is 1247 * empty, then we broadcast the PADI 1248 * to all listening hooks. 1249 */ 1250 sendhook = pppoe_match_svc(node, tag); 1251 if (sendhook != NULL) 1252 NG_FWD_NEW_DATA(error, item, 1253 sendhook, m); 1254 else if (privp->flags & COMPAT_DLINK && 1255 ntohs(tag->tag_len) == 0) 1256 error = pppoe_broadcast_padi(node, m); 1257 else 1258 error = ENETUNREACH; 1259 break; 1260 case PADO_CODE: 1261 /* 1262 * We are a client: 1263 * Use the host_uniq tag to find the 1264 * hook this is in response to. 1265 * Received #2, now send #3 1266 * For now simply accept the first we receive. 1267 */ 1268 utag = get_tag(ph, PTT_HOST_UNIQ); 1269 if ((utag == NULL) 1270 || (ntohs(utag->tag_len) != sizeof(sp))) { 1271 log(LOG_NOTICE, "ng_pppoe[%x]: no host " 1272 "unique field\n", node->nd_ID); 1273 LEAVE(ENETUNREACH); 1274 } 1275 1276 sendhook = pppoe_finduniq(node, utag); 1277 if (sendhook == NULL) { 1278 log(LOG_NOTICE, "ng_pppoe[%x]: no " 1279 "matching session\n", node->nd_ID); 1280 LEAVE(ENETUNREACH); 1281 } 1282 1283 /* 1284 * Check the session is in the right state. 1285 * It needs to be in PPPOE_SINIT. 1286 */ 1287 sp = NG_HOOK_PRIVATE(sendhook); 1288 if (sp->state != PPPOE_SINIT) { 1289 log(LOG_NOTICE, "ng_pppoe[%x]: session " 1290 "in wrong state\n", node->nd_ID); 1291 LEAVE(ENETUNREACH); 1292 } 1293 neg = sp->neg; 1294 ng_uncallout(&neg->handle, node); 1295 1296 /* 1297 * This is the first time we hear 1298 * from the server, so note it's 1299 * unicast address, replacing the 1300 * broadcast address . 1301 */ 1302 bcopy(wh->eh.ether_shost, 1303 neg->pkt->pkt_header.eh.ether_dhost, 1304 ETHER_ADDR_LEN); 1305 neg->timeout = 0; 1306 neg->pkt->pkt_header.ph.code = PADR_CODE; 1307 init_tags(sp); 1308 insert_tag(sp, utag); /* Host Unique */ 1309 if ((tag = get_tag(ph, PTT_AC_COOKIE))) 1310 insert_tag(sp, tag); /* return cookie */ 1311 if ((tag = get_tag(ph, PTT_AC_NAME))) { 1312 insert_tag(sp, tag); /* return it */ 1313 send_acname(sp, tag); 1314 } 1315 insert_tag(sp, &neg->service.hdr); /* Service */ 1316 scan_tags(sp, ph); 1317 make_packet(sp); 1318 sp->state = PPPOE_SREQ; 1319 ng_pppoe_sendpacket(sp); 1320 break; 1321 case PADR_CODE: 1322 1323 /* 1324 * We are a server: 1325 * Use the ac_cookie tag to find the 1326 * hook this is in response to. 1327 */ 1328 utag = get_tag(ph, PTT_AC_COOKIE); 1329 if ((utag == NULL) 1330 || (ntohs(utag->tag_len) != sizeof(sp))) { 1331 LEAVE(ENETUNREACH); 1332 } 1333 1334 sendhook = pppoe_finduniq(node, utag); 1335 if (sendhook == NULL) { 1336 LEAVE(ENETUNREACH); 1337 } 1338 1339 /* 1340 * Check the session is in the right state. 1341 * It needs to be in PPPOE_SOFFER 1342 * or PPPOE_NEWCONNECTED. If the latter, 1343 * then this is a retry by the client. 1344 * so be nice, and resend. 1345 */ 1346 sp = NG_HOOK_PRIVATE(sendhook); 1347 if (sp->state == PPPOE_NEWCONNECTED) { 1348 /* 1349 * Whoa! drop back to resend that 1350 * PADS packet. 1351 * We should still have a copy of it. 1352 */ 1353 sp->state = PPPOE_SOFFER; 1354 } 1355 if (sp->state != PPPOE_SOFFER) { 1356 LEAVE (ENETUNREACH); 1357 break; 1358 } 1359 neg = sp->neg; 1360 ng_uncallout(&neg->handle, node); 1361 neg->pkt->pkt_header.ph.code = PADS_CODE; 1362 if (sp->Session_ID == 0) 1363 neg->pkt->pkt_header.ph.sid = 1364 htons(sp->Session_ID 1365 = get_new_sid(node)); 1366 send_sessionid(sp); 1367 neg->timeout = 0; 1368 /* 1369 * start working out the tags to respond with. 1370 */ 1371 init_tags(sp); 1372 insert_tag(sp, &neg->ac_name.hdr); /* AC_NAME */ 1373 if ((tag = get_tag(ph, PTT_SRV_NAME))) 1374 insert_tag(sp, tag);/* return service */ 1375 if ((tag = get_tag(ph, PTT_HOST_UNIQ))) 1376 insert_tag(sp, tag); /* return it */ 1377 insert_tag(sp, utag); /* ac_cookie */ 1378 scan_tags(sp, ph); 1379 make_packet(sp); 1380 sp->state = PPPOE_NEWCONNECTED; 1381 ng_pppoe_sendpacket(sp); 1382 /* 1383 * Having sent the last Negotiation header, 1384 * Set up the stored packet header to 1385 * be correct for the actual session. 1386 * But keep the negotialtion stuff 1387 * around in case we need to resend this last 1388 * packet. We'll discard it when we move 1389 * from NEWCONNECTED to CONNECTED 1390 */ 1391 sp->pkt_hdr = neg->pkt->pkt_header; 1392 /* Configure ethertype depending on what 1393 * ethertype was used at discovery phase */ 1394 if (sp->pkt_hdr.eh.ether_type == 1395 ETHERTYPE_PPPOE_3COM_DISC) 1396 sp->pkt_hdr.eh.ether_type 1397 = ETHERTYPE_PPPOE_3COM_SESS; 1398 else 1399 sp->pkt_hdr.eh.ether_type 1400 = ETHERTYPE_PPPOE_SESS; 1401 sp->pkt_hdr.ph.code = 0; 1402 pppoe_send_event(sp, NGM_PPPOE_SUCCESS); 1403 break; 1404 case PADS_CODE: 1405 /* 1406 * We are a client: 1407 * Use the host_uniq tag to find the 1408 * hook this is in response to. 1409 * take the session ID and store it away. 1410 * Also make sure the pre-made header is 1411 * correct and set us into Session mode. 1412 */ 1413 utag = get_tag(ph, PTT_HOST_UNIQ); 1414 if ((utag == NULL) 1415 || (ntohs(utag->tag_len) != sizeof(sp))) { 1416 LEAVE (ENETUNREACH); 1417 break; 1418 } 1419 sendhook = pppoe_finduniq(node, utag); 1420 if (sendhook == NULL) { 1421 LEAVE(ENETUNREACH); 1422 } 1423 1424 /* 1425 * Check the session is in the right state. 1426 * It needs to be in PPPOE_SREQ. 1427 */ 1428 sp = NG_HOOK_PRIVATE(sendhook); 1429 if (sp->state != PPPOE_SREQ) { 1430 LEAVE(ENETUNREACH); 1431 } 1432 neg = sp->neg; 1433 ng_uncallout(&neg->handle, node); 1434 neg->pkt->pkt_header.ph.sid = wh->ph.sid; 1435 sp->Session_ID = ntohs(wh->ph.sid); 1436 send_sessionid(sp); 1437 neg->timeout = 0; 1438 sp->state = PPPOE_CONNECTED; 1439 /* 1440 * Now we have gone to Connected mode, 1441 * Free all resources needed for 1442 * negotiation. 1443 * Keep a copy of the header we will be using. 1444 */ 1445 sp->pkt_hdr = neg->pkt->pkt_header; 1446 if (privp->flags & COMPAT_3COM) 1447 sp->pkt_hdr.eh.ether_type 1448 = ETHERTYPE_PPPOE_3COM_SESS; 1449 else 1450 sp->pkt_hdr.eh.ether_type 1451 = ETHERTYPE_PPPOE_SESS; 1452 sp->pkt_hdr.ph.code = 0; 1453 m_freem(neg->m); 1454 free(sp->neg, M_NETGRAPH_PPPOE); 1455 sp->neg = NULL; 1456 pppoe_send_event(sp, NGM_PPPOE_SUCCESS); 1457 break; 1458 case PADT_CODE: 1459 /* 1460 * Send a 'close' message to the controlling 1461 * process (the one that set us up); 1462 * And then tear everything down. 1463 * 1464 * Find matching peer/session combination. 1465 */ 1466 sendhook = pppoe_findsession(node, wh); 1467 if (sendhook == NULL) { 1468 LEAVE(ENETUNREACH); 1469 } 1470 /* send message to creator */ 1471 /* close hook */ 1472 if (sendhook) { 1473 ng_rmhook_self(sendhook); 1474 } 1475 break; 1476 default: 1477 LEAVE(EPFNOSUPPORT); 1478 } 1479 break; 1480 case ETHERTYPE_PPPOE_3COM_SESS: 1481 case ETHERTYPE_PPPOE_SESS: 1482 /* 1483 * Find matching peer/session combination. 1484 */ 1485 sendhook = pppoe_findsession(node, wh); 1486 if (sendhook == NULL) { 1487 LEAVE (ENETUNREACH); 1488 break; 1489 } 1490 sp = NG_HOOK_PRIVATE(sendhook); 1491 m_adj(m, sizeof(*wh)); 1492 if (m->m_pkthdr.len < length) { 1493 /* Packet too short, dump it */ 1494 LEAVE(EMSGSIZE); 1495 } 1496 1497 /* Also need to trim excess at the end */ 1498 if (m->m_pkthdr.len > length) { 1499 m_adj(m, -((int)(m->m_pkthdr.len - length))); 1500 } 1501 if ( sp->state != PPPOE_CONNECTED) { 1502 if (sp->state == PPPOE_NEWCONNECTED) { 1503 sp->state = PPPOE_CONNECTED; 1504 /* 1505 * Now we have gone to Connected mode, 1506 * Free all resources needed for 1507 * negotiation. Be paranoid about 1508 * whether there may be a timeout. 1509 */ 1510 m_freem(sp->neg->m); 1511 ng_uncallout(&sp->neg->handle, node); 1512 free(sp->neg, M_NETGRAPH_PPPOE); 1513 sp->neg = NULL; 1514 } else { 1515 LEAVE (ENETUNREACH); 1516 break; 1517 } 1518 } 1519 NG_FWD_NEW_DATA( error, item, sendhook, m); 1520 break; 1521 default: 1522 LEAVE(EPFNOSUPPORT); 1523 } 1524 } else { 1525 /* 1526 * Not ethernet or debug hook.. 1527 * 1528 * The packet has come in on a normal hook. 1529 * We need to find out what kind of hook, 1530 * So we can decide how to handle it. 1531 * Check the hook's state. 1532 */ 1533 sp = NG_HOOK_PRIVATE(hook); 1534 switch (sp->state) { 1535 case PPPOE_NEWCONNECTED: 1536 case PPPOE_CONNECTED: { 1537 static const u_char addrctrl[] = { 0xff, 0x03 }; 1538 struct pppoe_full_hdr *wh; 1539 1540 /* 1541 * Remove PPP address and control fields, if any. 1542 * For example, ng_ppp(4) always sends LCP packets 1543 * with address and control fields as required by 1544 * generic PPP. PPPoE is an exception to the rule. 1545 */ 1546 if (m->m_pkthdr.len >= 2) { 1547 if (m->m_len < 2 && !(m = m_pullup(m, 2))) 1548 LEAVE(ENOBUFS); 1549 if (bcmp(mtod(m, u_char *), addrctrl, 2) == 0) 1550 m_adj(m, 2); 1551 } 1552 /* 1553 * Bang in a pre-made header, and set the length up 1554 * to be correct. Then send it to the ethernet driver. 1555 * But first correct the length. 1556 */ 1557 sp->pkt_hdr.ph.length = htons((short)(m->m_pkthdr.len)); 1558 M_PREPEND(m, sizeof(*wh), M_DONTWAIT); 1559 if (m == NULL) 1560 LEAVE(ENOBUFS); 1561 1562 wh = mtod(m, struct pppoe_full_hdr *); 1563 bcopy(&sp->pkt_hdr, wh, sizeof(*wh)); 1564 NG_FWD_NEW_DATA( error, item, privp->ethernet_hook, m); 1565 privp->packets_out++; 1566 break; 1567 } 1568 case PPPOE_PRIMED: 1569 /* 1570 * A PADI packet is being returned by the application 1571 * that has set up this hook. This indicates that it 1572 * wants us to offer service. 1573 */ 1574 neg = sp->neg; 1575 if (m->m_len < sizeof(*wh)) { 1576 m = m_pullup(m, sizeof(*wh)); 1577 if (m == NULL) 1578 LEAVE(ENOBUFS); 1579 } 1580 wh = mtod(m, struct pppoe_full_hdr *); 1581 ph = &wh->ph; 1582 session = ntohs(wh->ph.sid); 1583 length = ntohs(wh->ph.length); 1584 code = wh->ph.code; 1585 /* Use peers mode in session. */ 1586 neg->pkt->pkt_header.eh.ether_type = wh->eh.ether_type; 1587 if (code != PADI_CODE) 1588 LEAVE(EINVAL); 1589 ng_uncallout(&neg->handle, node); 1590 1591 /* 1592 * This is the first time we hear 1593 * from the client, so note it's 1594 * unicast address, replacing the 1595 * broadcast address. 1596 */ 1597 bcopy(wh->eh.ether_shost, 1598 neg->pkt->pkt_header.eh.ether_dhost, 1599 ETHER_ADDR_LEN); 1600 sp->state = PPPOE_SOFFER; 1601 neg->timeout = 0; 1602 neg->pkt->pkt_header.ph.code = PADO_CODE; 1603 1604 /* 1605 * Start working out the tags to respond with. 1606 */ 1607 uniqtag.hdr.tag_type = PTT_AC_COOKIE; 1608 uniqtag.hdr.tag_len = htons((u_int16_t)sizeof(sp)); 1609 uniqtag.data.pointer = sp; 1610 init_tags(sp); 1611 insert_tag(sp, &neg->ac_name.hdr); /* AC_NAME */ 1612 if ((tag = get_tag(ph, PTT_SRV_NAME))) 1613 insert_tag(sp, tag); /* return service */ 1614 /* 1615 * If we have a NULL service request 1616 * and have an extra service defined in this hook, 1617 * then also add a tag for the extra service. 1618 * XXX this is a hack. eventually we should be able 1619 * to support advertising many services, not just one 1620 */ 1621 if (((tag == NULL) || (tag->tag_len == 0)) && 1622 (neg->service.hdr.tag_len != 0)) { 1623 insert_tag(sp, &neg->service.hdr); /* SERVICE */ 1624 } 1625 if ((tag = get_tag(ph, PTT_HOST_UNIQ))) 1626 insert_tag(sp, tag); /* returned hostunique */ 1627 insert_tag(sp, &uniqtag.hdr); 1628 scan_tags(sp, ph); 1629 make_packet(sp); 1630 ng_pppoe_sendpacket(sp); 1631 break; 1632 1633 /* 1634 * Packets coming from the hook make no sense 1635 * to sessions in these states. Throw them away. 1636 */ 1637 case PPPOE_SINIT: 1638 case PPPOE_SREQ: 1639 case PPPOE_SOFFER: 1640 case PPPOE_SNONE: 1641 case PPPOE_LISTENING: 1642 case PPPOE_DEAD: 1643 default: 1644 LEAVE(ENETUNREACH); 1645 } 1646 } 1647quit: 1648 if (item) 1649 NG_FREE_ITEM(item); 1650 NG_FREE_M(m); 1651 return error; 1652} 1653 1654/* 1655 * Do local shutdown processing.. 1656 * If we are a persistant device, we might refuse to go away, and 1657 * we'd only remove our links and reset ourself. 1658 */ 1659static int 1660ng_pppoe_shutdown(node_p node) 1661{ 1662 const priv_p privdata = NG_NODE_PRIVATE(node); 1663 1664 NG_NODE_SET_PRIVATE(node, NULL); 1665 NG_NODE_UNREF(privdata->node); 1666 free(privdata, M_NETGRAPH_PPPOE); 1667 return (0); 1668} 1669 1670/* 1671 * Hook disconnection 1672 * 1673 * Clean up all dangling links and information about the session/hook. 1674 * For this type, removal of the last link destroys the node. 1675 */ 1676static int 1677ng_pppoe_disconnect(hook_p hook) 1678{ 1679 node_p node = NG_HOOK_NODE(hook); 1680 priv_p privp = NG_NODE_PRIVATE(node); 1681 sessp sp; 1682 int hooks; 1683 1684 hooks = NG_NODE_NUMHOOKS(node); /* This one already not counted. */ 1685 if (NG_HOOK_PRIVATE(hook) == &privp->debug_hook) { 1686 privp->debug_hook = NULL; 1687 } else if (NG_HOOK_PRIVATE(hook) == &privp->ethernet_hook) { 1688 privp->ethernet_hook = NULL; 1689 if (NG_NODE_IS_VALID(node)) 1690 ng_rmnode_self(node); 1691 } else { 1692 sp = NG_HOOK_PRIVATE(hook); 1693 if (sp->state != PPPOE_SNONE ) { 1694 pppoe_send_event(sp, NGM_PPPOE_CLOSE); 1695 } 1696 /* 1697 * According to the spec, if we are connected, 1698 * we should send a DISC packet if we are shutting down 1699 * a session. 1700 */ 1701 if ((privp->ethernet_hook) 1702 && ((sp->state == PPPOE_CONNECTED) 1703 || (sp->state == PPPOE_NEWCONNECTED))) { 1704 struct mbuf *m; 1705 struct pppoe_full_hdr *wh; 1706 struct pppoe_tag *tag; 1707 int msglen = strlen(SIGNOFF); 1708 int error = 0; 1709 1710 /* Revert the stored header to DISC/PADT mode. */ 1711 wh = &sp->pkt_hdr; 1712 wh->ph.code = PADT_CODE; 1713 /* 1714 * Configure ethertype depending on what was used 1715 * during sessions stage. 1716 */ 1717 if (sp->pkt_hdr.eh.ether_type == 1718 ETHERTYPE_PPPOE_3COM_SESS) 1719 wh->eh.ether_type = ETHERTYPE_PPPOE_3COM_DISC; 1720 else 1721 wh->eh.ether_type = ETHERTYPE_PPPOE_DISC; 1722 1723 /* Generate a packet of that type. */ 1724 MGETHDR(m, M_DONTWAIT, MT_DATA); 1725 if (m == NULL) 1726 log(LOG_NOTICE, "ng_pppoe[%x]: session out of " 1727 "mbufs\n", node->nd_ID); 1728 else { 1729 m->m_pkthdr.rcvif = NULL; 1730 m->m_pkthdr.len = m->m_len = sizeof(*wh); 1731 bcopy((caddr_t)wh, mtod(m, caddr_t), 1732 sizeof(*wh)); 1733 /* 1734 * Add a General error message and adjust 1735 * sizes. 1736 */ 1737 wh = mtod(m, struct pppoe_full_hdr *); 1738 tag = wh->ph.tag; 1739 tag->tag_type = PTT_GEN_ERR; 1740 tag->tag_len = htons((u_int16_t)msglen); 1741 strncpy(tag->tag_data, SIGNOFF, msglen); 1742 m->m_pkthdr.len = (m->m_len += sizeof(*tag) + 1743 msglen); 1744 wh->ph.length = htons(sizeof(*tag) + msglen); 1745 NG_SEND_DATA_ONLY(error, 1746 privp->ethernet_hook, m); 1747 } 1748 } 1749 /* 1750 * As long as we have somewhere to store the timeout handle, 1751 * we may have a timeout pending.. get rid of it. 1752 */ 1753 if (sp->neg) { 1754 ng_uncallout(&sp->neg->handle, node); 1755 if (sp->neg->m) 1756 m_freem(sp->neg->m); 1757 free(sp->neg, M_NETGRAPH_PPPOE); 1758 } 1759 free(sp, M_NETGRAPH_PPPOE); 1760 NG_HOOK_SET_PRIVATE(hook, NULL); 1761 1762 /* 1763 * Work out how many session hooks there are. 1764 * Node goes away on last session hook removal. 1765 */ 1766 if (privp->ethernet_hook) 1767 hooks -= 1; 1768 if (privp->debug_hook) 1769 hooks -= 1; 1770 } 1771 if ((NG_NODE_NUMHOOKS(node) == 0) && 1772 (NG_NODE_IS_VALID(node))) 1773 ng_rmnode_self(node); 1774 return (0); 1775} 1776 1777/* 1778 * Timeouts come here. 1779 */ 1780static void 1781pppoe_ticker(node_p node, hook_p hook, void *arg1, int arg2) 1782{ 1783 priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 1784 sessp sp = NG_HOOK_PRIVATE(hook); 1785 negp neg = sp->neg; 1786 struct mbuf *m0 = NULL; 1787 int error = 0; 1788 1789 CTR6(KTR_NET, "%20s: node [%x] (%p) hook \"%s\" (%p) session %d", 1790 __func__, node->nd_ID, node, hook->hk_name, hook, sp->Session_ID); 1791 switch(sp->state) { 1792 /* 1793 * Resend the last packet, using an exponential backoff. 1794 * After a period of time, stop growing the backoff, 1795 * And either leave it, or revert to the start. 1796 */ 1797 case PPPOE_SINIT: 1798 case PPPOE_SREQ: 1799 /* Timeouts on these produce resends. */ 1800 m0 = m_copypacket(sp->neg->m, M_DONTWAIT); 1801 NG_SEND_DATA_ONLY( error, privp->ethernet_hook, m0); 1802 ng_callout(&neg->handle, node, hook, neg->timeout * hz, 1803 pppoe_ticker, NULL, 0); 1804 if ((neg->timeout <<= 1) > PPPOE_TIMEOUT_LIMIT) { 1805 if (sp->state == PPPOE_SREQ) { 1806 /* Revert to SINIT mode. */ 1807 pppoe_start(sp); 1808 } else { 1809 neg->timeout = PPPOE_TIMEOUT_LIMIT; 1810 } 1811 } 1812 break; 1813 case PPPOE_PRIMED: 1814 case PPPOE_SOFFER: 1815 /* A timeout on these says "give up" */ 1816 ng_rmhook_self(hook); 1817 break; 1818 default: 1819 /* Timeouts have no meaning in other states. */ 1820 log(LOG_NOTICE, "ng_pppoe[%x]: unexpected timeout\n", 1821 node->nd_ID); 1822 } 1823} 1824 1825 1826static void 1827ng_pppoe_sendpacket(sessp sp) 1828{ 1829 struct mbuf *m0 = NULL; 1830 hook_p hook = sp->hook; 1831 node_p node = NG_HOOK_NODE(hook); 1832 priv_p privp = NG_NODE_PRIVATE(node); 1833 negp neg = sp->neg; 1834 int error = 0; 1835 1836 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID); 1837 switch(sp->state) { 1838 case PPPOE_LISTENING: 1839 case PPPOE_DEAD: 1840 case PPPOE_SNONE: 1841 case PPPOE_CONNECTED: 1842 log(LOG_NOTICE, "%s: unexpected state %d\n", 1843 __func__, sp->state); 1844 break; 1845 1846 case PPPOE_NEWCONNECTED: 1847 /* Send the PADS without a timeout - we're now connected. */ 1848 m0 = m_copypacket(sp->neg->m, M_DONTWAIT); 1849 NG_SEND_DATA_ONLY( error, privp->ethernet_hook, m0); 1850 break; 1851 1852 case PPPOE_PRIMED: 1853 /* No packet to send, but set up the timeout. */ 1854 ng_callout(&neg->handle, node, hook, PPPOE_OFFER_TIMEOUT * hz, 1855 pppoe_ticker, NULL, 0); 1856 break; 1857 1858 case PPPOE_SOFFER: 1859 /* 1860 * Send the offer but if they don't respond 1861 * in PPPOE_OFFER_TIMEOUT seconds, forget about it. 1862 */ 1863 m0 = m_copypacket(sp->neg->m, M_DONTWAIT); 1864 NG_SEND_DATA_ONLY( error, privp->ethernet_hook, m0); 1865 ng_callout(&neg->handle, node, hook, PPPOE_OFFER_TIMEOUT * hz, 1866 pppoe_ticker, NULL, 0); 1867 break; 1868 1869 case PPPOE_SINIT: 1870 case PPPOE_SREQ: 1871 m0 = m_copypacket(sp->neg->m, M_DONTWAIT); 1872 NG_SEND_DATA_ONLY( error, privp->ethernet_hook, m0); 1873 ng_callout(&neg->handle, node, hook, PPPOE_INITIAL_TIMEOUT * hz, 1874 pppoe_ticker, NULL, 0); 1875 neg->timeout = PPPOE_INITIAL_TIMEOUT * 2; 1876 break; 1877 1878 default: 1879 error = EINVAL; 1880 log(LOG_NOTICE, "%s: bad state %d\n", __func__, sp->state); 1881 } 1882} 1883 1884/* 1885 * Parse an incoming packet to see if any tags should be copied to the 1886 * output packet. Don't do any tags that have been handled in the main 1887 * state machine. 1888 */ 1889static const struct pppoe_tag* 1890scan_tags(sessp sp, const struct pppoe_hdr* ph) 1891{ 1892 const char *const end = (const char *)next_tag(ph); 1893 const char *ptn; 1894 const struct pppoe_tag *pt = &ph->tag[0]; 1895 1896 /* 1897 * Keep processing tags while a tag header will still fit. 1898 */ 1899 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID); 1900 1901 while((const char*)(pt + 1) <= end) { 1902 /* 1903 * If the tag data would go past the end of the packet, abort. 1904 */ 1905 ptn = (((const char *)(pt + 1)) + ntohs(pt->tag_len)); 1906 if(ptn > end) 1907 return NULL; 1908 1909 switch (pt->tag_type) { 1910 case PTT_RELAY_SID: 1911 insert_tag(sp, pt); 1912 break; 1913 case PTT_EOL: 1914 return NULL; 1915 case PTT_SRV_NAME: 1916 case PTT_AC_NAME: 1917 case PTT_HOST_UNIQ: 1918 case PTT_AC_COOKIE: 1919 case PTT_VENDOR: 1920 case PTT_SRV_ERR: 1921 case PTT_SYS_ERR: 1922 case PTT_GEN_ERR: 1923 break; 1924 } 1925 pt = (const struct pppoe_tag*)ptn; 1926 } 1927 return NULL; 1928} 1929 1930static int 1931pppoe_send_event(sessp sp, enum cmd cmdid) 1932{ 1933 int error; 1934 struct ng_mesg *msg; 1935 struct ngpppoe_sts *sts; 1936 1937 CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID); 1938 1939 NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, cmdid, 1940 sizeof(struct ngpppoe_sts), M_NOWAIT); 1941 if (msg == NULL) 1942 return (ENOMEM); 1943 sts = (struct ngpppoe_sts *)msg->data; 1944 strncpy(sts->hook, NG_HOOK_NAME(sp->hook), NG_HOOKSIZ); 1945 NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0); 1946 return (error); 1947} 1948