ether.c revision 74916
162053Smarkm/*- 2255362Smarkm * Copyright (c) 1999 Brian Somers <brian@Awfulhak.org> 362053Smarkm * All rights reserved. 462053Smarkm * 562053Smarkm * Redistribution and use in source and binary forms, with or without 662053Smarkm * modification, are permitted provided that the following conditions 762053Smarkm * are met: 862053Smarkm * 1. Redistributions of source code must retain the above copyright 962053Smarkm * notice, this list of conditions and the following disclaimer. 1062053Smarkm * 2. Redistributions in binary form must reproduce the above copyright 1162053Smarkm * notice, this list of conditions and the following disclaimer in the 1262053Smarkm * documentation and/or other materials provided with the distribution. 1362053Smarkm * 1462053Smarkm * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1562053Smarkm * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1662053Smarkm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1762053Smarkm * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1862053Smarkm * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1962053Smarkm * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2062053Smarkm * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2162053Smarkm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2262053Smarkm * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2362053Smarkm * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2462053Smarkm * SUCH DAMAGE. 2562053Smarkm * 2662053Smarkm * $FreeBSD: head/usr.sbin/ppp/ether.c 74916 2001-03-28 09:45:27Z brian $ 2762053Smarkm */ 28119418Sobrien 29119418Sobrien#include <sys/param.h> 30119418Sobrien#include <sys/socket.h> 31256381Smarkm#include <sys/un.h> 32256381Smarkm#include <netinet/in.h> 3362053Smarkm#include <arpa/inet.h> 3465686Smarkm#include <netdb.h> 3574914Sjhb#include <netgraph.h> 36122871Smarkm#include <net/ethernet.h> 3767365Sjhb#include <net/if.h> 3862053Smarkm#include <net/route.h> 3974072Smarkm#include <netinet/in_systm.h> 40122871Smarkm#include <netinet/ip.h> 4169168Smarkm#include <netgraph/ng_ether.h> 42143418Sume#include <netgraph/ng_message.h> 43100082Smarkm#include <netgraph/ng_pppoe.h> 4469168Smarkm#include <netgraph/ng_socket.h> 4567112Smarkm 46254147Sobrien#include <errno.h> 47128059Smarkm#include <stdio.h> 4867112Smarkm#include <stdlib.h> 4962053Smarkm#include <string.h> 50255362Smarkm#include <sysexits.h> 51255362Smarkm#include <sys/fcntl.h> 52255362Smarkm#if defined(__FreeBSD__) && !defined(NOKLDLOAD) 53255362Smarkm#include <sys/linker.h> 54255362Smarkm#include <sys/module.h> 55255362Smarkm#endif 56255362Smarkm#include <sys/stat.h> 57255362Smarkm#include <sys/uio.h> 58255362Smarkm#include <termios.h> 59255362Smarkm#include <sys/time.h> 60255362Smarkm#include <unistd.h> 61255362Smarkm 62255362Smarkm#include "layer.h" 63255362Smarkm#include "defs.h" 64255362Smarkm#include "mbuf.h" 65255362Smarkm#include "log.h" 66255362Smarkm#include "timer.h" 67255362Smarkm#include "lqr.h" 68255362Smarkm#include "hdlc.h" 69255362Smarkm#include "throughput.h" 70255362Smarkm#include "fsm.h" 71255362Smarkm#include "lcp.h" 72255362Smarkm#include "ccp.h" 73255362Smarkm#include "link.h" 74255362Smarkm#include "async.h" 75255362Smarkm#include "descriptor.h" 76255362Smarkm#include "physical.h" 77255362Smarkm#include "main.h" 78255362Smarkm#include "mp.h" 7974072Smarkm#include "chat.h" 8074072Smarkm#include "auth.h" 81255362Smarkm#include "chap.h" 82255362Smarkm#include "cbcp.h" 8374072Smarkm#include "datalink.h" 8474072Smarkm#include "slcompress.h" 8562765Smarkm#include "iplist.h" 8674072Smarkm#include "ipcp.h" 8762053Smarkm#include "filter.h" 8865686Smarkm#ifndef NORADIUS 89153575Sps#include "radius.h" 9062765Smarkm#endif 91255362Smarkm#include "bundle.h" 92255362Smarkm#include "id.h" 93255362Smarkm#include "iface.h" 94255362Smarkm#include "ether.h" 95255362Smarkm 96255362Smarkm 97255362Smarkm#define PPPOE_NODE_TYPE_LEN (sizeof NG_PPPOE_NODE_TYPE - 1) /* "PPPoE" */ 98255362Smarkm 99255362Smarkmstruct etherdevice { 100255362Smarkm struct device dev; /* What struct physical knows about */ 101255362Smarkm int cs; /* Control socket */ 102256381Smarkm int connected; /* Are we connected yet ? */ 103255362Smarkm int timeout; /* Seconds attempting to connect */ 104255362Smarkm char hook[sizeof TUN_NAME + 11]; /* Our socket node hook */ 105255362Smarkm}; 106255362Smarkm 107255362Smarkm#define device2ether(d) \ 108255362Smarkm ((d)->type == ETHER_DEVICE ? (struct etherdevice *)d : NULL) 109255362Smarkm 110255362Smarkmint 11174072Smarkmether_DeviceSize(void) 11274072Smarkm{ 11374072Smarkm return sizeof(struct etherdevice); 11462765Smarkm} 11591600Smarkm 11665686Smarkmstatic ssize_t 11791600Smarkmether_Write(struct physical *p, const void *v, size_t n) 11865686Smarkm{ 119256381Smarkm struct etherdevice *dev = device2ether(p->handler); 120256381Smarkm 121256381Smarkm return NgSendData(p->fd, dev->hook, v, n) == -1 ? -1 : n; 122256381Smarkm} 123256381Smarkm 124256381Smarkmstatic ssize_t 125256381Smarkmether_Read(struct physical *p, void *v, size_t n) 126256381Smarkm{ 127256381Smarkm char hook[sizeof TUN_NAME + 11]; 128256381Smarkm 129256381Smarkm return NgRecvData(p->fd, v, n, hook); 130256381Smarkm} 131256381Smarkm 132256381Smarkmstatic int 133256381Smarkmether_RemoveFromSet(struct physical *p, fd_set *r, fd_set *w, fd_set *e) 13474072Smarkm{ 13574072Smarkm struct etherdevice *dev = device2ether(p->handler); 136256381Smarkm int result; 137256381Smarkm 138256381Smarkm if (r && dev->cs >= 0 && FD_ISSET(dev->cs, r)) { 13965686Smarkm FD_CLR(dev->cs, r); 14074072Smarkm log_Printf(LogTIMER, "%s: fdunset(ctrl) %d\n", p->link.name, dev->cs); 14174072Smarkm result = 1; 14274072Smarkm } else 14391600Smarkm result = 0; 14474072Smarkm 14574072Smarkm /* Careful... physical_RemoveFromSet() called us ! */ 14674072Smarkm 14765686Smarkm p->handler->removefromset = NULL; 14874072Smarkm result += physical_RemoveFromSet(p, r, w, e); 14965686Smarkm p->handler->removefromset = ether_RemoveFromSet; 15074072Smarkm 15174072Smarkm return result; 15274072Smarkm} 15365686Smarkm 15474072Smarkmstatic void 15574072Smarkmether_Free(struct physical *p) 15674072Smarkm{ 15765686Smarkm struct etherdevice *dev = device2ether(p->handler); 15874072Smarkm 15974072Smarkm physical_SetDescriptor(p); 16062765Smarkm if (dev->cs != -1) 16162765Smarkm close(dev->cs); 16274072Smarkm free(dev); 163254147Sobrien} 16462053Smarkm 16574072Smarkmstatic const char * 166170025Srwatsonether_OpenInfo(struct physical *p) 16765686Smarkm{ 16872364Smarkm struct etherdevice *dev = device2ether(p->handler); 16972364Smarkm 17072364Smarkm switch (dev->connected) { 171170025Srwatson case CARRIER_PENDING: 172254147Sobrien return "negotiating"; 173128059Smarkm case CARRIER_OK: 174128059Smarkm return "established"; 175128059Smarkm } 176170025Srwatson 177128059Smarkm return "disconnected"; 178128059Smarkm} 179128059Smarkm 180128059Smarkmstatic void 181128059Smarkmether_device2iov(struct device *d, struct iovec *iov, int *niov, 182128059Smarkm int maxiov, int *auxfd, int *nauxfd) 183170025Srwatson{ 184128059Smarkm struct etherdevice *dev = device2ether(d); 185128059Smarkm int sz = physical_MaxDeviceSize(); 186128059Smarkm 187128059Smarkm iov[*niov].iov_base = realloc(d, sz); 188128059Smarkm if (iov[*niov].iov_base == NULL) { 189128059Smarkm log_Printf(LogALERT, "Failed to allocate memory: %d\n", sz); 190170025Srwatson AbortProgram(EX_OSERR); 191128059Smarkm } 192128059Smarkm iov[*niov].iov_len = sz; 193255362Smarkm (*niov)++; 194128059Smarkm 195128059Smarkm if (dev->cs >= 0) { 196128059Smarkm *auxfd = dev->cs; 197170025Srwatson (*nauxfd)++; 198128059Smarkm } 199128059Smarkm} 200255362Smarkm 201128059Smarkmstatic void 202128059Smarkmether_MessageIn(struct etherdevice *dev) 203128059Smarkm{ 204170025Srwatson char msgbuf[sizeof(struct ng_mesg) + sizeof(struct ngpppoe_sts)]; 205128059Smarkm struct ng_mesg *rep = (struct ng_mesg *)msgbuf; 206128059Smarkm struct ngpppoe_sts *sts = (struct ngpppoe_sts *)(msgbuf + sizeof *rep); 207128059Smarkm char unknown[14]; 208128059Smarkm const char *msg; 209128059Smarkm struct timeval t; 210128059Smarkm fd_set *r; 21162765Smarkm int ret; 21262765Smarkm 213255362Smarkm if (dev->cs < 0) 214255362Smarkm return; 21562765Smarkm 21662765Smarkm if ((r = mkfdset()) == NULL) { 21765686Smarkm log_Printf(LogERROR, "DoLoop: Cannot create fd_set\n"); 21874072Smarkm return; 21974072Smarkm } 220255362Smarkm zerofdset(r); 22165686Smarkm FD_SET(dev->cs, r); 22274072Smarkm t.tv_sec = t.tv_usec = 0; 223255362Smarkm ret = select(dev->cs + 1, r, NULL, NULL, &t); 22469526Smarkm free(r); 22574072Smarkm 226255362Smarkm if (ret <= 0) 22762053Smarkm return; 22862053Smarkm 22962053Smarkm if (NgRecvMsg(dev->cs, rep, sizeof msgbuf, NULL) < 0) 230128059Smarkm return; 23162053Smarkm 23265686Smarkm if (rep->header.version != NG_VERSION) { 23362765Smarkm log_Printf(LogWARN, "%ld: Unexpected netgraph version, expected %ld\n", 23462765Smarkm (long)rep->header.version, (long)NG_VERSION); 23562765Smarkm return; 23674072Smarkm } 23762765Smarkm 23865686Smarkm if (rep->header.typecookie != NGM_PPPOE_COOKIE) { 23965686Smarkm log_Printf(LogWARN, "%ld: Unexpected netgraph cookie, expected %ld\n", 24063771Smarkm (long)rep->header.typecookie, (long)NGM_PPPOE_COOKIE); 241255362Smarkm return; 242255362Smarkm } 243255362Smarkm 244255362Smarkm switch (rep->header.cmd) { 24591600Smarkm case NGM_PPPOE_SET_FLAG: msg = "SET_FLAG"; break; 24691600Smarkm case NGM_PPPOE_CONNECT: msg = "CONNECT"; break; 24762053Smarkm case NGM_PPPOE_LISTEN: msg = "LISTEN"; break; 248256381Smarkm case NGM_PPPOE_OFFER: msg = "OFFER"; break; 249256381Smarkm case NGM_PPPOE_SUCCESS: msg = "SUCCESS"; break; 250256381Smarkm case NGM_PPPOE_FAIL: msg = "FAIL"; break; 251256381Smarkm case NGM_PPPOE_CLOSE: msg = "CLOSE"; break; 25265686Smarkm case NGM_PPPOE_GET_STATUS: msg = "GET_STATUS"; break; 25372200Sbmilekic default: 25465686Smarkm snprintf(unknown, sizeof unknown, "<%d>", (int)rep->header.cmd); 25562053Smarkm msg = unknown; 25662053Smarkm break; 257255362Smarkm } 25865686Smarkm 25965686Smarkm log_Printf(LogPHASE, "Received NGM_PPPOE_%s (hook \"%s\")\n", msg, sts->hook); 260255362Smarkm 26174072Smarkm switch (rep->header.cmd) { 262255362Smarkm case NGM_PPPOE_SUCCESS: 263255362Smarkm dev->connected = CARRIER_OK; 264255362Smarkm break; 265255362Smarkm case NGM_PPPOE_FAIL: 26662765Smarkm case NGM_PPPOE_CLOSE: 26763771Smarkm dev->connected = CARRIER_LOST; 26863771Smarkm break; 26963771Smarkm } 27062053Smarkm} 27162765Smarkm 27262765Smarkmstatic int 27362765Smarkmether_AwaitCarrier(struct physical *p) 274255362Smarkm{ 27574072Smarkm struct etherdevice *dev = device2ether(p->handler); 276255362Smarkm 27762765Smarkm if (dev->connected != CARRIER_OK && !dev->timeout--) 278255362Smarkm dev->connected = CARRIER_LOST; 27962765Smarkm else if (dev->connected == CARRIER_PENDING) 280255362Smarkm ether_MessageIn(dev); 28165686Smarkm 282255362Smarkm return dev->connected; 28362053Smarkm} 28462053Smarkm 28565686Smarkmstatic const struct device baseetherdevice = { 28665686Smarkm ETHER_DEVICE, 28765686Smarkm "ether", 28862053Smarkm { CD_REQUIRED, DEF_ETHERCDDELAY }, 289255362Smarkm ether_AwaitCarrier, 290255362Smarkm ether_RemoveFromSet, 29165686Smarkm NULL, 292255362Smarkm NULL, 293255362Smarkm NULL, 294255362Smarkm NULL, 29562053Smarkm ether_Free, 29662053Smarkm ether_Read, 29762053Smarkm ether_Write, 298255362Smarkm ether_device2iov, 299255362Smarkm NULL, 300255362Smarkm ether_OpenInfo 30162053Smarkm}; 30262765Smarkm 30362053Smarkmstruct device * 304256381Smarkmether_iov2device(int type, struct physical *p, struct iovec *iov, int *niov, 305256381Smarkm int maxiov, int *auxfd, int *nauxfd) 30674072Smarkm{ 30762053Smarkm if (type == ETHER_DEVICE) { 30862053Smarkm struct etherdevice *dev = (struct etherdevice *)iov[(*niov)++].iov_base; 30962053Smarkm 31065686Smarkm dev = realloc(dev, sizeof *dev); /* Reduce to the correct size */ 31165686Smarkm if (dev == NULL) { 31265686Smarkm log_Printf(LogALERT, "Failed to allocate memory: %d\n", 31362053Smarkm (int)(sizeof *dev)); 31465686Smarkm AbortProgram(EX_OSERR); 31565686Smarkm } 31662053Smarkm 317153575Sps if (*nauxfd) { 318255362Smarkm dev->cs = *auxfd; 319153575Sps (*nauxfd)--; 32065686Smarkm } else 32172200Sbmilekic dev->cs = -1; 32262053Smarkm 32362053Smarkm /* Refresh function pointers etc */ 324100082Smarkm memcpy(&dev->dev, &baseetherdevice, sizeof dev->dev); 32591600Smarkm 326128059Smarkm physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNCNOACF); 32762053Smarkm return &dev->dev; 32862053Smarkm } 32962053Smarkm 330255362Smarkm return NULL; 331107789Smarkm} 33291600Smarkm 33391600Smarkmstatic int 33462053Smarkmether_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n) 335256381Smarkm{ 336256381Smarkm struct physical *p = descriptor2physical(d); 337256381Smarkm struct etherdevice *dev = device2ether(p->handler); 338256381Smarkm int result; 33962875Smarkm 34072200Sbmilekic if (r && dev->cs >= 0) { 34162875Smarkm FD_SET(dev->cs, r); 34262053Smarkm log_Printf(LogTIMER, "%s(ctrl): fdset(r) %d\n", p->link.name, dev->cs); 34362053Smarkm result = 1; 34462765Smarkm } else 34562053Smarkm result = 0; 34662053Smarkm 347255362Smarkm result += physical_doUpdateSet(d, r, w, e, n, 0); 34862053Smarkm 349255362Smarkm return result; 350255362Smarkm} 351255362Smarkm 352255362Smarkmstatic int 353107789Smarkmether_IsSet(struct fdescriptor *d, const fd_set *fdset) 354255362Smarkm{ 35562053Smarkm struct physical *p = descriptor2physical(d); 35662765Smarkm struct etherdevice *dev = device2ether(p->handler); 35762053Smarkm int result; 358107789Smarkm 359174073Ssimon result = dev->cs >= 0 && FD_ISSET(dev->cs, fdset); 36062053Smarkm result += physical_IsSet(d, fdset); 36162053Smarkm 36262053Smarkm return result; 36362053Smarkm} 364255362Smarkm 365255362Smarkmstatic void 36691600Smarkmether_DescriptorRead(struct fdescriptor *d, struct bundle *bundle, 367255362Smarkm const fd_set *fdset) 368255362Smarkm{ 36962053Smarkm struct physical *p = descriptor2physical(d); 37062765Smarkm struct etherdevice *dev = device2ether(p->handler); 37162053Smarkm 37262053Smarkm if (dev->cs >= 0 && FD_ISSET(dev->cs, fdset)) { 37362053Smarkm ether_MessageIn(dev); 37462053Smarkm if (dev->connected == CARRIER_LOST) { 375128059Smarkm log_Printf(LogPHASE, "%s: Device disconnected\n", p->link.name); 376255362Smarkm datalink_Down(p->dl, CLOSE_NORMAL); 37762053Smarkm return; 37862053Smarkm } 37962053Smarkm } 38072200Sbmilekic 381256381Smarkm if (physical_IsSet(d, fdset)) 38262053Smarkm physical_DescriptorRead(d, bundle, fdset); 38362053Smarkm} 38462765Smarkm 38562053Smarkmstatic struct device * 38662053Smarkmether_Abandon(struct etherdevice *dev, struct physical *p) 38774072Smarkm{ 388255362Smarkm /* Abandon our node construction */ 38962053Smarkm close(dev->cs); 390255362Smarkm close(p->fd); 391255362Smarkm p->fd = -2; /* Nobody else need try.. */ 392255362Smarkm free(dev); 39362053Smarkm 39462053Smarkm return NULL; 395255362Smarkm} 39665686Smarkm 39762053Smarkmstruct device * 39862765Smarkmether_Create(struct physical *p) 39969172Smarkm{ 40069172Smarkm u_char rbuf[2048]; 401128059Smarkm struct etherdevice *dev; 40269172Smarkm struct ng_mesg *resp; 403256381Smarkm const struct hooklist *hlist; 404256381Smarkm const struct nodeinfo *ninfo; 405256381Smarkm char *path; 406256381Smarkm int ifacelen, f; 407256381Smarkm 408256381Smarkm dev = NULL; 409256381Smarkm path = NULL; 410256381Smarkm ifacelen = 0; 411256381Smarkm if (p->fd < 0 && !strncasecmp(p->name.full, NG_PPPOE_NODE_TYPE, 412256381Smarkm PPPOE_NODE_TYPE_LEN) && 413256381Smarkm p->name.full[PPPOE_NODE_TYPE_LEN] == ':') { 414256381Smarkm const struct linkinfo *nlink; 415100082Smarkm struct ngpppoe_init_data *data; 41669172Smarkm struct ngm_mkpeer mkp; 417 struct ngm_connect ngc; 418 const char *iface, *provider; 419 char etherid[12]; 420 int providerlen; 421 char connectpath[sizeof dev->hook + 2]; /* .:<hook> */ 422 423 p->fd--; /* We own the device - change fd */ 424 425#if defined(__FreeBSD__) && !defined(NOKLDLOAD) 426 if (modfind("netgraph") == -1) { 427 log_Printf(LogWARN, "Netgraph is not built into the kernel\n"); 428 return NULL; 429 } 430 431 if (modfind("ng_ether") == -1 && ID0kldload("ng_ether") == -1) 432 /* 433 * Don't treat this as an error as older kernels have this stuff 434 * built in as part of the netgraph node itself. 435 */ 436 log_Printf(LogWARN, "kldload: ng_ether: %s\n", strerror(errno)); 437 438 if (modfind("ng_socket") == -1 && ID0kldload("ng_socket") == -1) { 439 log_Printf(LogWARN, "kldload: ng_socket: %s\n", strerror(errno)); 440 return NULL; 441 } 442#endif 443 444 if ((dev = malloc(sizeof *dev)) == NULL) 445 return NULL; 446 447 iface = p->name.full + PPPOE_NODE_TYPE_LEN + 1; 448 449 provider = strchr(iface, ':'); 450 if (provider) { 451 ifacelen = provider - iface; 452 provider++; 453 providerlen = strlen(provider); 454 } else { 455 ifacelen = strlen(iface); 456 provider = ""; 457 providerlen = 0; 458 } 459 460 /* 461 * We're going to do this (where tunN is our tunnel device): 462 * 463 * .---------. 464 * | ether | 465 * | <iface> | dev->cs 466 * `---------' | 467 * (orphan) p->fd | 468 * | | | 469 * | | | 470 * (ethernet) | | 471 * .---------. .-----------. 472 * | pppoe | | socket | 473 * | <iface> |(tunN)<---->(tunN)| <unnamed> | 474 * `--------- `-----------' 475 * (tunX) 476 * ^ 477 * | 478 * `--->(tunX) 479 */ 480 481 /* Create a socket node */ 482 if (ID0NgMkSockNode(NULL, &dev->cs, &p->fd) == -1) { 483 log_Printf(LogWARN, "Cannot create netgraph socket node: %s\n", 484 strerror(errno)); 485 free(dev); 486 return NULL; 487 } 488 489 /* 490 * Ask for a list of hooks attached to the "ether" node. This node should 491 * magically exist as a way of hooking stuff onto an ethernet device 492 */ 493 path = (char *)alloca(ifacelen + 2); 494 sprintf(path, "%.*s:", ifacelen, iface); 495 if (NgSendMsg(dev->cs, path, NGM_GENERIC_COOKIE, NGM_LISTHOOKS, 496 NULL, 0) < 0) { 497 log_Printf(LogWARN, "%s Cannot send a netgraph message: %s\n", 498 path, strerror(errno)); 499 return ether_Abandon(dev, p); 500 } 501 502 /* Get our list back */ 503 resp = (struct ng_mesg *)rbuf; 504 if (NgRecvMsg(dev->cs, resp, sizeof rbuf, NULL) < 0) { 505 log_Printf(LogWARN, "Cannot get netgraph response: %s\n", 506 strerror(errno)); 507 return ether_Abandon(dev, p); 508 } 509 510 hlist = (const struct hooklist *)resp->data; 511 ninfo = &hlist->nodeinfo; 512 513 /* Make sure we've got the right type of node */ 514 if (strncmp(ninfo->type, NG_ETHER_NODE_TYPE, 515 sizeof NG_ETHER_NODE_TYPE - 1)) { 516 log_Printf(LogWARN, "%s Unexpected node type ``%s'' (wanted ``" 517 NG_ETHER_NODE_TYPE "'')\n", path, ninfo->type); 518 return ether_Abandon(dev, p); 519 } 520 521 log_Printf(LogDEBUG, "List of netgraph node ``%s'' (id %x) hooks:\n", 522 path, ninfo->id); 523 524 /* look for a hook already attached. */ 525 for (f = 0; f < ninfo->hooks; f++) { 526 nlink = &hlist->link[f]; 527 528 log_Printf(LogDEBUG, " Found %s -> %s\n", nlink->ourhook, 529 nlink->peerhook); 530 531 if (!strcmp(nlink->ourhook, NG_ETHER_HOOK_ORPHAN) || 532 !strcmp(nlink->ourhook, NG_ETHER_HOOK_DIVERT)) { 533 /* 534 * Something is using the data coming out of this ``ether'' node. 535 * If it's a PPPoE node, we use that node, otherwise we complain that 536 * someone else is using the node. 537 */ 538 if (!strcmp(nlink->nodeinfo.type, NG_PPPOE_NODE_TYPE)) 539 /* Use this PPPoE node ! */ 540 snprintf(ngc.path, sizeof ngc.path, "[%x]:", nlink->nodeinfo.id); 541 else { 542 log_Printf(LogWARN, "%s Node type ``%s'' is currently active\n", 543 path, nlink->nodeinfo.type); 544 return ether_Abandon(dev, p); 545 } 546 break; 547 } 548 } 549 550 if (f == ninfo->hooks) { 551 /* 552 * Create a new ``PPPoE'' node connected to the ``ether'' node using 553 * the magic ``orphan'' and ``ethernet'' hooks 554 */ 555 snprintf(mkp.type, sizeof mkp.type, "%s", NG_PPPOE_NODE_TYPE); 556 snprintf(mkp.ourhook, sizeof mkp.ourhook, "%s", NG_ETHER_HOOK_ORPHAN); 557 snprintf(mkp.peerhook, sizeof mkp.peerhook, "%s", NG_PPPOE_HOOK_ETHERNET); 558 snprintf(etherid, sizeof etherid, "[%x]:", ninfo->id); 559 560 log_Printf(LogDEBUG, "Creating PPPoE netgraph node %s%s -> %s\n", 561 etherid, mkp.ourhook, mkp.peerhook); 562 563 if (NgSendMsg(dev->cs, etherid, NGM_GENERIC_COOKIE, 564 NGM_MKPEER, &mkp, sizeof mkp) < 0) { 565 log_Printf(LogWARN, "%s Cannot create PPPoE netgraph node: %s\n", 566 etherid, strerror(errno)); 567 return ether_Abandon(dev, p); 568 } 569 570 snprintf(ngc.path, sizeof ngc.path, "%s%s", path, NG_ETHER_HOOK_ORPHAN); 571 } 572 573 snprintf(dev->hook, sizeof dev->hook, "%s%d", 574 TUN_NAME, p->dl->bundle->unit); 575 576 /* 577 * Connect the PPPoE node to our socket node. 578 * ngc.path has already been set up 579 */ 580 snprintf(ngc.ourhook, sizeof ngc.ourhook, "%s", dev->hook); 581 memcpy(ngc.peerhook, ngc.ourhook, sizeof ngc.peerhook); 582 583 log_Printf(LogDEBUG, "Connecting netgraph socket .:%s -> %s:%s\n", 584 ngc.ourhook, ngc.path, ngc.peerhook); 585 if (NgSendMsg(dev->cs, ".:", NGM_GENERIC_COOKIE, 586 NGM_CONNECT, &ngc, sizeof ngc) < 0) { 587 log_Printf(LogWARN, "Cannot connect PPPoE and socket netgraph " 588 "nodes: %s\n", strerror(errno)); 589 return ether_Abandon(dev, p); 590 } 591 592 /* And finally, request a connection to the given provider */ 593 594 data = (struct ngpppoe_init_data *)alloca(sizeof *data + providerlen); 595 snprintf(data->hook, sizeof data->hook, "%s", dev->hook); 596 memcpy(data->data, provider, providerlen); 597 data->data_len = providerlen; 598 599 snprintf(connectpath, sizeof connectpath, ".:%s", dev->hook); 600 log_Printf(LogDEBUG, "Sending PPPOE_CONNECT to %s\n", connectpath); 601 if (NgSendMsg(dev->cs, connectpath, NGM_PPPOE_COOKIE, 602 NGM_PPPOE_CONNECT, data, sizeof *data + providerlen) == -1) { 603 log_Printf(LogWARN, "``%s'': Cannot start netgraph node: %s\n", 604 connectpath, strerror(errno)); 605 return ether_Abandon(dev, p); 606 } 607 608 /* Hook things up so that we monitor dev->cs */ 609 p->desc.UpdateSet = ether_UpdateSet; 610 p->desc.IsSet = ether_IsSet; 611 p->desc.Read = ether_DescriptorRead; 612 613 memcpy(&dev->dev, &baseetherdevice, sizeof dev->dev); 614 switch (p->cfg.cd.necessity) { 615 case CD_VARIABLE: 616 dev->dev.cd.delay = p->cfg.cd.delay; 617 break; 618 case CD_REQUIRED: 619 dev->dev.cd = p->cfg.cd; 620 break; 621 case CD_NOTREQUIRED: 622 log_Printf(LogWARN, "%s: Carrier must be set, using ``set cd %d!''\n", 623 p->link.name, dev->dev.cd.delay); 624 case CD_DEFAULT: 625 break; 626 } 627 628 dev->timeout = dev->dev.cd.delay; 629 dev->connected = CARRIER_PENDING; 630 631 } else { 632 /* See if we're a netgraph socket */ 633 struct stat st; 634 635 if (fstat(p->fd, &st) != -1 && (st.st_mode & S_IFSOCK)) { 636 struct sockaddr_storage ssock; 637 struct sockaddr *sock = (struct sockaddr *)&ssock; 638 int sz; 639 640 sz = sizeof ssock; 641 if (getsockname(p->fd, sock, &sz) == -1) { 642 log_Printf(LogPHASE, "%s: Link is a closed socket !\n", p->link.name); 643 close(p->fd); 644 p->fd = -1; 645 return NULL; 646 } 647 648 if (sock->sa_family == AF_NETGRAPH) { 649 /* 650 * It's a netgraph node... We can't determine hook names etc, so we 651 * stay pretty impartial.... 652 */ 653 log_Printf(LogPHASE, "%s: Link is a netgraph node\n", p->link.name); 654 655 if ((dev = malloc(sizeof *dev)) == NULL) { 656 log_Printf(LogWARN, "%s: Cannot allocate an ether device: %s\n", 657 p->link.name, strerror(errno)); 658 return NULL; 659 } 660 661 memcpy(&dev->dev, &baseetherdevice, sizeof dev->dev); 662 dev->cs = -1; 663 dev->timeout = 0; 664 dev->connected = CARRIER_OK; 665 *dev->hook = '\0'; 666 } 667 } 668 } 669 670 if (dev) { 671 physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNCNOACF); 672 673 /* Moan about (and fix) invalid LCP configurations */ 674 if (p->link.lcp.cfg.mru > 1492) { 675 log_Printf(LogWARN, "%s: Reducing MRU to 1492\n", p->link.name); 676 p->link.lcp.cfg.mru = 1492; 677 } 678 if (p->dl->bundle->cfg.mtu > 1492) { 679 log_Printf(LogWARN, "%s: Reducing MTU to 1492\n", p->link.name); 680 p->dl->bundle->cfg.mtu = 1492; 681 } 682 683 if (path != NULL) { 684 /* Mark the interface as UP if it's not already */ 685 686 path[ifacelen] = '\0'; /* Remove the trailing ':' */ 687 if (!iface_SetFlags(path, IFF_UP)) 688 log_Printf(LogWARN, "%s: Failed to set the IFF_UP flag on %s\n", 689 p->link.name, path); 690 } 691 692 return &dev->dev; 693 } 694 695 return NULL; 696} 697