ether.c revision 78410
152942Sbrian/*- 252942Sbrian * Copyright (c) 1999 Brian Somers <brian@Awfulhak.org> 352942Sbrian * All rights reserved. 452942Sbrian * 552942Sbrian * Redistribution and use in source and binary forms, with or without 652942Sbrian * modification, are permitted provided that the following conditions 752942Sbrian * are met: 852942Sbrian * 1. Redistributions of source code must retain the above copyright 952942Sbrian * notice, this list of conditions and the following disclaimer. 1052942Sbrian * 2. Redistributions in binary form must reproduce the above copyright 1152942Sbrian * notice, this list of conditions and the following disclaimer in the 1252942Sbrian * documentation and/or other materials provided with the distribution. 1352942Sbrian * 1452942Sbrian * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1552942Sbrian * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1652942Sbrian * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1752942Sbrian * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1852942Sbrian * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1952942Sbrian * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2052942Sbrian * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2152942Sbrian * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2252942Sbrian * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2352942Sbrian * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2452942Sbrian * SUCH DAMAGE. 2552942Sbrian * 2652942Sbrian * $FreeBSD: head/usr.sbin/ppp/ether.c 78410 2001-06-18 14:59:36Z brian $ 2752942Sbrian */ 2852942Sbrian 2952942Sbrian#include <sys/param.h> 3052942Sbrian#include <sys/socket.h> 3152942Sbrian#include <sys/un.h> 3252942Sbrian#include <netinet/in.h> 3352942Sbrian#include <arpa/inet.h> 3452942Sbrian#include <netdb.h> 3552942Sbrian#include <netgraph.h> 3652942Sbrian#include <net/ethernet.h> 3774916Sbrian#include <net/if.h> 3874916Sbrian#include <net/route.h> 3952942Sbrian#include <netinet/in_systm.h> 4052942Sbrian#include <netinet/ip.h> 4152942Sbrian#include <netgraph/ng_ether.h> 4252942Sbrian#include <netgraph/ng_message.h> 4352942Sbrian#include <netgraph/ng_pppoe.h> 4452942Sbrian#include <netgraph/ng_socket.h> 4552942Sbrian 4652942Sbrian#include <errno.h> 4752942Sbrian#include <stdio.h> 4852942Sbrian#include <stdlib.h> 4952942Sbrian#include <string.h> 5052942Sbrian#include <sysexits.h> 5152942Sbrian#include <sys/fcntl.h> 5252942Sbrian#if defined(__FreeBSD__) && !defined(NOKLDLOAD) 5352942Sbrian#include <sys/linker.h> 5453241Sbrian#include <sys/module.h> 5552942Sbrian#endif 5671006Sbrian#include <sys/stat.h> 5752942Sbrian#include <sys/uio.h> 5852942Sbrian#include <termios.h> 5952942Sbrian#include <sys/time.h> 6052942Sbrian#include <unistd.h> 6152942Sbrian 6252942Sbrian#include "layer.h" 6352942Sbrian#include "defs.h" 6452942Sbrian#include "mbuf.h" 6552942Sbrian#include "log.h" 6652942Sbrian#include "timer.h" 6752942Sbrian#include "lqr.h" 6852942Sbrian#include "hdlc.h" 6952942Sbrian#include "throughput.h" 7052942Sbrian#include "fsm.h" 7152942Sbrian#include "lcp.h" 7252942Sbrian#include "ccp.h" 7352942Sbrian#include "link.h" 7452942Sbrian#include "async.h" 7552942Sbrian#include "descriptor.h" 7652942Sbrian#include "physical.h" 7752942Sbrian#include "main.h" 7852942Sbrian#include "mp.h" 7952942Sbrian#include "chat.h" 8052942Sbrian#include "auth.h" 8152942Sbrian#include "chap.h" 8252942Sbrian#include "cbcp.h" 8352942Sbrian#include "datalink.h" 8452942Sbrian#include "slcompress.h" 8552942Sbrian#include "iplist.h" 8652942Sbrian#include "ipcp.h" 8752942Sbrian#include "filter.h" 8852942Sbrian#ifndef NORADIUS 8952942Sbrian#include "radius.h" 9052942Sbrian#endif 9152942Sbrian#include "bundle.h" 9252942Sbrian#include "id.h" 9374916Sbrian#include "iface.h" 9452942Sbrian#include "ether.h" 9552942Sbrian 9652942Sbrian 9752942Sbrian#define PPPOE_NODE_TYPE_LEN (sizeof NG_PPPOE_NODE_TYPE - 1) /* "PPPoE" */ 9852942Sbrian 9952942Sbrianstruct etherdevice { 10052942Sbrian struct device dev; /* What struct physical knows about */ 10152942Sbrian int cs; /* Control socket */ 10252942Sbrian int connected; /* Are we connected yet ? */ 10352942Sbrian int timeout; /* Seconds attempting to connect */ 10452942Sbrian char hook[sizeof TUN_NAME + 11]; /* Our socket node hook */ 10552942Sbrian}; 10652942Sbrian 10752942Sbrian#define device2ether(d) \ 10852942Sbrian ((d)->type == ETHER_DEVICE ? (struct etherdevice *)d : NULL) 10952942Sbrian 11052942Sbrianint 11152942Sbrianether_DeviceSize(void) 11252942Sbrian{ 11352942Sbrian return sizeof(struct etherdevice); 11452942Sbrian} 11552942Sbrian 11652942Sbrianstatic ssize_t 11752942Sbrianether_Write(struct physical *p, const void *v, size_t n) 11852942Sbrian{ 11952942Sbrian struct etherdevice *dev = device2ether(p->handler); 12052942Sbrian 12152942Sbrian return NgSendData(p->fd, dev->hook, v, n) == -1 ? -1 : n; 12252942Sbrian} 12352942Sbrian 12452942Sbrianstatic ssize_t 12552942Sbrianether_Read(struct physical *p, void *v, size_t n) 12652942Sbrian{ 12752942Sbrian char hook[sizeof TUN_NAME + 11]; 12852942Sbrian 12952942Sbrian return NgRecvData(p->fd, v, n, hook); 13052942Sbrian} 13152942Sbrian 13252942Sbrianstatic int 13352942Sbrianether_RemoveFromSet(struct physical *p, fd_set *r, fd_set *w, fd_set *e) 13452942Sbrian{ 13552942Sbrian struct etherdevice *dev = device2ether(p->handler); 13652942Sbrian int result; 13752942Sbrian 13852942Sbrian if (r && dev->cs >= 0 && FD_ISSET(dev->cs, r)) { 13952942Sbrian FD_CLR(dev->cs, r); 14052942Sbrian log_Printf(LogTIMER, "%s: fdunset(ctrl) %d\n", p->link.name, dev->cs); 14152942Sbrian result = 1; 14252942Sbrian } else 14352942Sbrian result = 0; 14452942Sbrian 14552942Sbrian /* Careful... physical_RemoveFromSet() called us ! */ 14652942Sbrian 14752942Sbrian p->handler->removefromset = NULL; 14852942Sbrian result += physical_RemoveFromSet(p, r, w, e); 14952942Sbrian p->handler->removefromset = ether_RemoveFromSet; 15052942Sbrian 15152942Sbrian return result; 15252942Sbrian} 15352942Sbrian 15452942Sbrianstatic void 15552942Sbrianether_Free(struct physical *p) 15652942Sbrian{ 15752942Sbrian struct etherdevice *dev = device2ether(p->handler); 15852942Sbrian 15952942Sbrian physical_SetDescriptor(p); 16052942Sbrian if (dev->cs != -1) 16152942Sbrian close(dev->cs); 16252942Sbrian free(dev); 16352942Sbrian} 16452942Sbrian 16552942Sbrianstatic const char * 16652942Sbrianether_OpenInfo(struct physical *p) 16752942Sbrian{ 16852942Sbrian struct etherdevice *dev = device2ether(p->handler); 16952942Sbrian 17052942Sbrian switch (dev->connected) { 17152942Sbrian case CARRIER_PENDING: 17252942Sbrian return "negotiating"; 17352942Sbrian case CARRIER_OK: 17452942Sbrian return "established"; 17552942Sbrian } 17652942Sbrian 17752942Sbrian return "disconnected"; 17852942Sbrian} 17952942Sbrian 18052942Sbrianstatic void 18152942Sbrianether_device2iov(struct device *d, struct iovec *iov, int *niov, 18253684Sbrian int maxiov, int *auxfd, int *nauxfd) 18352942Sbrian{ 18452942Sbrian struct etherdevice *dev = device2ether(d); 18552942Sbrian int sz = physical_MaxDeviceSize(); 18652942Sbrian 18752942Sbrian iov[*niov].iov_base = realloc(d, sz); 18852942Sbrian if (iov[*niov].iov_base == NULL) { 18952942Sbrian log_Printf(LogALERT, "Failed to allocate memory: %d\n", sz); 19052942Sbrian AbortProgram(EX_OSERR); 19152942Sbrian } 19252942Sbrian iov[*niov].iov_len = sz; 19352942Sbrian (*niov)++; 19452942Sbrian 19552942Sbrian if (dev->cs >= 0) { 19652942Sbrian *auxfd = dev->cs; 19752942Sbrian (*nauxfd)++; 19852942Sbrian } 19952942Sbrian} 20052942Sbrian 20152942Sbrianstatic void 20252942Sbrianether_MessageIn(struct etherdevice *dev) 20352942Sbrian{ 20452942Sbrian char msgbuf[sizeof(struct ng_mesg) + sizeof(struct ngpppoe_sts)]; 20552942Sbrian struct ng_mesg *rep = (struct ng_mesg *)msgbuf; 20652942Sbrian struct ngpppoe_sts *sts = (struct ngpppoe_sts *)(msgbuf + sizeof *rep); 20752942Sbrian char unknown[14]; 20852942Sbrian const char *msg; 20952942Sbrian struct timeval t; 21066898Sbrian fd_set *r; 21166898Sbrian int ret; 21252942Sbrian 21352942Sbrian if (dev->cs < 0) 21452942Sbrian return; 21552942Sbrian 21666898Sbrian if ((r = mkfdset()) == NULL) { 21766898Sbrian log_Printf(LogERROR, "DoLoop: Cannot create fd_set\n"); 21866898Sbrian return; 21966898Sbrian } 22066898Sbrian zerofdset(r); 22166898Sbrian FD_SET(dev->cs, r); 22252942Sbrian t.tv_sec = t.tv_usec = 0; 22366898Sbrian ret = select(dev->cs + 1, r, NULL, NULL, &t); 22466898Sbrian free(r); 22566898Sbrian 22666898Sbrian if (ret <= 0) 22752942Sbrian return; 22852942Sbrian 22952942Sbrian if (NgRecvMsg(dev->cs, rep, sizeof msgbuf, NULL) < 0) 23052942Sbrian return; 23152942Sbrian 23252942Sbrian if (rep->header.version != NG_VERSION) { 23352942Sbrian log_Printf(LogWARN, "%ld: Unexpected netgraph version, expected %ld\n", 23452942Sbrian (long)rep->header.version, (long)NG_VERSION); 23552942Sbrian return; 23652942Sbrian } 23752942Sbrian 23852942Sbrian if (rep->header.typecookie != NGM_PPPOE_COOKIE) { 23952942Sbrian log_Printf(LogWARN, "%ld: Unexpected netgraph cookie, expected %ld\n", 24052942Sbrian (long)rep->header.typecookie, (long)NGM_PPPOE_COOKIE); 24152942Sbrian return; 24252942Sbrian } 24352942Sbrian 24452942Sbrian switch (rep->header.cmd) { 24552942Sbrian case NGM_PPPOE_SET_FLAG: msg = "SET_FLAG"; break; 24652942Sbrian case NGM_PPPOE_CONNECT: msg = "CONNECT"; break; 24752942Sbrian case NGM_PPPOE_LISTEN: msg = "LISTEN"; break; 24852942Sbrian case NGM_PPPOE_OFFER: msg = "OFFER"; break; 24952942Sbrian case NGM_PPPOE_SUCCESS: msg = "SUCCESS"; break; 25052942Sbrian case NGM_PPPOE_FAIL: msg = "FAIL"; break; 25152942Sbrian case NGM_PPPOE_CLOSE: msg = "CLOSE"; break; 25252942Sbrian case NGM_PPPOE_GET_STATUS: msg = "GET_STATUS"; break; 25352942Sbrian default: 25452942Sbrian snprintf(unknown, sizeof unknown, "<%d>", (int)rep->header.cmd); 25552942Sbrian msg = unknown; 25652942Sbrian break; 25752942Sbrian } 25852942Sbrian 25952942Sbrian log_Printf(LogPHASE, "Received NGM_PPPOE_%s (hook \"%s\")\n", msg, sts->hook); 26052942Sbrian 26152942Sbrian switch (rep->header.cmd) { 26252942Sbrian case NGM_PPPOE_SUCCESS: 26352942Sbrian dev->connected = CARRIER_OK; 26452942Sbrian break; 26552942Sbrian case NGM_PPPOE_FAIL: 26652942Sbrian case NGM_PPPOE_CLOSE: 26752942Sbrian dev->connected = CARRIER_LOST; 26852942Sbrian break; 26952942Sbrian } 27052942Sbrian} 27152942Sbrian 27252942Sbrianstatic int 27352942Sbrianether_AwaitCarrier(struct physical *p) 27452942Sbrian{ 27552942Sbrian struct etherdevice *dev = device2ether(p->handler); 27652942Sbrian 27753071Sbrian if (dev->connected != CARRIER_OK && !dev->timeout--) 27852942Sbrian dev->connected = CARRIER_LOST; 27952942Sbrian else if (dev->connected == CARRIER_PENDING) 28052942Sbrian ether_MessageIn(dev); 28152942Sbrian 28252942Sbrian return dev->connected; 28352942Sbrian} 28452942Sbrian 28552942Sbrianstatic const struct device baseetherdevice = { 28652942Sbrian ETHER_DEVICE, 28752942Sbrian "ether", 28878410Sbrian 1492, 28953733Sbrian { CD_REQUIRED, DEF_ETHERCDDELAY }, 29052942Sbrian ether_AwaitCarrier, 29152942Sbrian ether_RemoveFromSet, 29252942Sbrian NULL, 29352942Sbrian NULL, 29452942Sbrian NULL, 29552942Sbrian NULL, 29652942Sbrian ether_Free, 29752942Sbrian ether_Read, 29852942Sbrian ether_Write, 29952942Sbrian ether_device2iov, 30052942Sbrian NULL, 30152942Sbrian ether_OpenInfo 30252942Sbrian}; 30352942Sbrian 30452942Sbrianstruct device * 30552942Sbrianether_iov2device(int type, struct physical *p, struct iovec *iov, int *niov, 30652942Sbrian int maxiov, int *auxfd, int *nauxfd) 30752942Sbrian{ 30852942Sbrian if (type == ETHER_DEVICE) { 30952942Sbrian struct etherdevice *dev = (struct etherdevice *)iov[(*niov)++].iov_base; 31052942Sbrian 31152942Sbrian dev = realloc(dev, sizeof *dev); /* Reduce to the correct size */ 31252942Sbrian if (dev == NULL) { 31352942Sbrian log_Printf(LogALERT, "Failed to allocate memory: %d\n", 31452942Sbrian (int)(sizeof *dev)); 31552942Sbrian AbortProgram(EX_OSERR); 31652942Sbrian } 31752942Sbrian 31852942Sbrian if (*nauxfd) { 31952942Sbrian dev->cs = *auxfd; 32052942Sbrian (*nauxfd)--; 32152942Sbrian } else 32252942Sbrian dev->cs = -1; 32352942Sbrian 32452942Sbrian /* Refresh function pointers etc */ 32552942Sbrian memcpy(&dev->dev, &baseetherdevice, sizeof dev->dev); 32652942Sbrian 32752942Sbrian physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNCNOACF); 32852942Sbrian return &dev->dev; 32952942Sbrian } 33052942Sbrian 33152942Sbrian return NULL; 33252942Sbrian} 33352942Sbrian 33452942Sbrianstatic int 33558028Sbrianether_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n) 33652942Sbrian{ 33752942Sbrian struct physical *p = descriptor2physical(d); 33852942Sbrian struct etherdevice *dev = device2ether(p->handler); 33952942Sbrian int result; 34052942Sbrian 34152942Sbrian if (r && dev->cs >= 0) { 34252942Sbrian FD_SET(dev->cs, r); 34352942Sbrian log_Printf(LogTIMER, "%s(ctrl): fdset(r) %d\n", p->link.name, dev->cs); 34452942Sbrian result = 1; 34552942Sbrian } else 34652942Sbrian result = 0; 34752942Sbrian 34852942Sbrian result += physical_doUpdateSet(d, r, w, e, n, 0); 34952942Sbrian 35052942Sbrian return result; 35152942Sbrian} 35252942Sbrian 35352942Sbrianstatic int 35458028Sbrianether_IsSet(struct fdescriptor *d, const fd_set *fdset) 35552942Sbrian{ 35652942Sbrian struct physical *p = descriptor2physical(d); 35752942Sbrian struct etherdevice *dev = device2ether(p->handler); 35852942Sbrian int result; 35952942Sbrian 36052942Sbrian result = dev->cs >= 0 && FD_ISSET(dev->cs, fdset); 36152942Sbrian result += physical_IsSet(d, fdset); 36252942Sbrian 36352942Sbrian return result; 36452942Sbrian} 36552942Sbrian 36652942Sbrianstatic void 36758028Sbrianether_DescriptorRead(struct fdescriptor *d, struct bundle *bundle, 36852942Sbrian const fd_set *fdset) 36952942Sbrian{ 37052942Sbrian struct physical *p = descriptor2physical(d); 37152942Sbrian struct etherdevice *dev = device2ether(p->handler); 37252942Sbrian 37352942Sbrian if (dev->cs >= 0 && FD_ISSET(dev->cs, fdset)) { 37452942Sbrian ether_MessageIn(dev); 37552942Sbrian if (dev->connected == CARRIER_LOST) { 37652942Sbrian log_Printf(LogPHASE, "%s: Device disconnected\n", p->link.name); 37752942Sbrian datalink_Down(p->dl, CLOSE_NORMAL); 37852942Sbrian return; 37952942Sbrian } 38052942Sbrian } 38152942Sbrian 38252942Sbrian if (physical_IsSet(d, fdset)) 38352942Sbrian physical_DescriptorRead(d, bundle, fdset); 38452942Sbrian} 38552942Sbrian 38652942Sbrianstatic struct device * 38752942Sbrianether_Abandon(struct etherdevice *dev, struct physical *p) 38852942Sbrian{ 38952942Sbrian /* Abandon our node construction */ 39052942Sbrian close(dev->cs); 39152942Sbrian close(p->fd); 39252942Sbrian p->fd = -2; /* Nobody else need try.. */ 39352942Sbrian free(dev); 39452942Sbrian 39552942Sbrian return NULL; 39652942Sbrian} 39752942Sbrian 39852942Sbrianstruct device * 39952942Sbrianether_Create(struct physical *p) 40052942Sbrian{ 40152942Sbrian u_char rbuf[2048]; 40252942Sbrian struct etherdevice *dev; 40352942Sbrian struct ng_mesg *resp; 40452942Sbrian const struct hooklist *hlist; 40552942Sbrian const struct nodeinfo *ninfo; 40674916Sbrian char *path; 40774916Sbrian int ifacelen, f; 40852942Sbrian 40952942Sbrian dev = NULL; 41074916Sbrian path = NULL; 41174916Sbrian ifacelen = 0; 41252942Sbrian if (p->fd < 0 && !strncasecmp(p->name.full, NG_PPPOE_NODE_TYPE, 41352942Sbrian PPPOE_NODE_TYPE_LEN) && 41452942Sbrian p->name.full[PPPOE_NODE_TYPE_LEN] == ':') { 41552942Sbrian const struct linkinfo *nlink; 41652942Sbrian struct ngpppoe_init_data *data; 41752942Sbrian struct ngm_mkpeer mkp; 41852942Sbrian struct ngm_connect ngc; 41952942Sbrian const char *iface, *provider; 42074916Sbrian char etherid[12]; 42174916Sbrian int providerlen; 42252942Sbrian char connectpath[sizeof dev->hook + 2]; /* .:<hook> */ 42352942Sbrian 42452942Sbrian p->fd--; /* We own the device - change fd */ 42552942Sbrian 42653241Sbrian#if defined(__FreeBSD__) && !defined(NOKLDLOAD) 42775252Sbrian if (modfind("netgraph") == -1 && ID0kldload("netgraph") == -1) { 42875252Sbrian log_Printf(LogWARN, "kldload: netgraph: %s\n", strerror(errno)); 42952942Sbrian return NULL; 43052942Sbrian } 43152942Sbrian 43262209Sbrian if (modfind("ng_ether") == -1 && ID0kldload("ng_ether") == -1) 43362209Sbrian /* 43462209Sbrian * Don't treat this as an error as older kernels have this stuff 43562209Sbrian * built in as part of the netgraph node itself. 43662209Sbrian */ 43762209Sbrian log_Printf(LogWARN, "kldload: ng_ether: %s\n", strerror(errno)); 43862209Sbrian 43975376Sbrian if (modfind("ng_pppoe") == -1 && ID0kldload("ng_pppoe") == -1) { 44075376Sbrian log_Printf(LogWARN, "kldload: ng_pppoe: %s\n", strerror(errno)); 44175376Sbrian return NULL; 44275376Sbrian } 44375376Sbrian 44462209Sbrian if (modfind("ng_socket") == -1 && ID0kldload("ng_socket") == -1) { 44552942Sbrian log_Printf(LogWARN, "kldload: ng_socket: %s\n", strerror(errno)); 44652942Sbrian return NULL; 44752942Sbrian } 44852942Sbrian#endif 44952942Sbrian 45052942Sbrian if ((dev = malloc(sizeof *dev)) == NULL) 45152942Sbrian return NULL; 45252942Sbrian 45352942Sbrian iface = p->name.full + PPPOE_NODE_TYPE_LEN + 1; 45452942Sbrian 45552942Sbrian provider = strchr(iface, ':'); 45652942Sbrian if (provider) { 45752942Sbrian ifacelen = provider - iface; 45852942Sbrian provider++; 45952942Sbrian providerlen = strlen(provider); 46052942Sbrian } else { 46152942Sbrian ifacelen = strlen(iface); 46252942Sbrian provider = ""; 46352942Sbrian providerlen = 0; 46452942Sbrian } 46552942Sbrian 46652942Sbrian /* 46752942Sbrian * We're going to do this (where tunN is our tunnel device): 46852942Sbrian * 46952942Sbrian * .---------. 47052942Sbrian * | ether | 47152942Sbrian * | <iface> | dev->cs 47252942Sbrian * `---------' | 47352942Sbrian * (orphan) p->fd | 47452942Sbrian * | | | 47552942Sbrian * | | | 47652942Sbrian * (ethernet) | | 47752942Sbrian * .---------. .-----------. 47852942Sbrian * | pppoe | | socket | 47952942Sbrian * | <iface> |(tunN)<---->(tunN)| <unnamed> | 48052942Sbrian * `--------- `-----------' 48152942Sbrian * (tunX) 48252942Sbrian * ^ 48352942Sbrian * | 48452942Sbrian * `--->(tunX) 48552942Sbrian */ 48652942Sbrian 48752942Sbrian /* Create a socket node */ 48853535Sbrian if (ID0NgMkSockNode(NULL, &dev->cs, &p->fd) == -1) { 48952942Sbrian log_Printf(LogWARN, "Cannot create netgraph socket node: %s\n", 49052942Sbrian strerror(errno)); 49152942Sbrian free(dev); 49252942Sbrian return NULL; 49352942Sbrian } 49452942Sbrian 49552942Sbrian /* 49652942Sbrian * Ask for a list of hooks attached to the "ether" node. This node should 49752942Sbrian * magically exist as a way of hooking stuff onto an ethernet device 49852942Sbrian */ 49952942Sbrian path = (char *)alloca(ifacelen + 2); 50052942Sbrian sprintf(path, "%.*s:", ifacelen, iface); 50152942Sbrian if (NgSendMsg(dev->cs, path, NGM_GENERIC_COOKIE, NGM_LISTHOOKS, 50252942Sbrian NULL, 0) < 0) { 50352942Sbrian log_Printf(LogWARN, "%s Cannot send a netgraph message: %s\n", 50452942Sbrian path, strerror(errno)); 50552942Sbrian return ether_Abandon(dev, p); 50652942Sbrian } 50752942Sbrian 50852942Sbrian /* Get our list back */ 50952942Sbrian resp = (struct ng_mesg *)rbuf; 51052942Sbrian if (NgRecvMsg(dev->cs, resp, sizeof rbuf, NULL) < 0) { 51152942Sbrian log_Printf(LogWARN, "Cannot get netgraph response: %s\n", 51252942Sbrian strerror(errno)); 51352942Sbrian return ether_Abandon(dev, p); 51452942Sbrian } 51552942Sbrian 51652942Sbrian hlist = (const struct hooklist *)resp->data; 51752942Sbrian ninfo = &hlist->nodeinfo; 51852942Sbrian 51952942Sbrian /* Make sure we've got the right type of node */ 52052942Sbrian if (strncmp(ninfo->type, NG_ETHER_NODE_TYPE, 52152942Sbrian sizeof NG_ETHER_NODE_TYPE - 1)) { 52252942Sbrian log_Printf(LogWARN, "%s Unexpected node type ``%s'' (wanted ``" 52352942Sbrian NG_ETHER_NODE_TYPE "'')\n", path, ninfo->type); 52452942Sbrian return ether_Abandon(dev, p); 52552942Sbrian } 52652942Sbrian 52752963Sbrian log_Printf(LogDEBUG, "List of netgraph node ``%s'' (id %x) hooks:\n", 52852942Sbrian path, ninfo->id); 52952942Sbrian 53052942Sbrian /* look for a hook already attached. */ 53152942Sbrian for (f = 0; f < ninfo->hooks; f++) { 53252942Sbrian nlink = &hlist->link[f]; 53352942Sbrian 53452942Sbrian log_Printf(LogDEBUG, " Found %s -> %s\n", nlink->ourhook, 53552942Sbrian nlink->peerhook); 53652942Sbrian 53752942Sbrian if (!strcmp(nlink->ourhook, NG_ETHER_HOOK_ORPHAN) || 53852942Sbrian !strcmp(nlink->ourhook, NG_ETHER_HOOK_DIVERT)) { 53952942Sbrian /* 54052942Sbrian * Something is using the data coming out of this ``ether'' node. 54152942Sbrian * If it's a PPPoE node, we use that node, otherwise we complain that 54252942Sbrian * someone else is using the node. 54352942Sbrian */ 54452942Sbrian if (!strcmp(nlink->nodeinfo.type, NG_PPPOE_NODE_TYPE)) 54552942Sbrian /* Use this PPPoE node ! */ 54652963Sbrian snprintf(ngc.path, sizeof ngc.path, "[%x]:", nlink->nodeinfo.id); 54752942Sbrian else { 54852942Sbrian log_Printf(LogWARN, "%s Node type ``%s'' is currently active\n", 54952942Sbrian path, nlink->nodeinfo.type); 55052942Sbrian return ether_Abandon(dev, p); 55152942Sbrian } 55252942Sbrian break; 55352942Sbrian } 55452942Sbrian } 55552942Sbrian 55652942Sbrian if (f == ninfo->hooks) { 55752942Sbrian /* 55852942Sbrian * Create a new ``PPPoE'' node connected to the ``ether'' node using 55952942Sbrian * the magic ``orphan'' and ``ethernet'' hooks 56052942Sbrian */ 56152942Sbrian snprintf(mkp.type, sizeof mkp.type, "%s", NG_PPPOE_NODE_TYPE); 56252942Sbrian snprintf(mkp.ourhook, sizeof mkp.ourhook, "%s", NG_ETHER_HOOK_ORPHAN); 56352942Sbrian snprintf(mkp.peerhook, sizeof mkp.peerhook, "%s", NG_PPPOE_HOOK_ETHERNET); 56452963Sbrian snprintf(etherid, sizeof etherid, "[%x]:", ninfo->id); 56552942Sbrian 56652942Sbrian log_Printf(LogDEBUG, "Creating PPPoE netgraph node %s%s -> %s\n", 56752942Sbrian etherid, mkp.ourhook, mkp.peerhook); 56852942Sbrian 56952942Sbrian if (NgSendMsg(dev->cs, etherid, NGM_GENERIC_COOKIE, 57052942Sbrian NGM_MKPEER, &mkp, sizeof mkp) < 0) { 57152942Sbrian log_Printf(LogWARN, "%s Cannot create PPPoE netgraph node: %s\n", 57252942Sbrian etherid, strerror(errno)); 57352942Sbrian return ether_Abandon(dev, p); 57452942Sbrian } 57552942Sbrian 57652942Sbrian snprintf(ngc.path, sizeof ngc.path, "%s%s", path, NG_ETHER_HOOK_ORPHAN); 57752942Sbrian } 57852942Sbrian 57952942Sbrian snprintf(dev->hook, sizeof dev->hook, "%s%d", 58052942Sbrian TUN_NAME, p->dl->bundle->unit); 58152942Sbrian 58252942Sbrian /* 58352942Sbrian * Connect the PPPoE node to our socket node. 58452942Sbrian * ngc.path has already been set up 58552942Sbrian */ 58652942Sbrian snprintf(ngc.ourhook, sizeof ngc.ourhook, "%s", dev->hook); 58752942Sbrian memcpy(ngc.peerhook, ngc.ourhook, sizeof ngc.peerhook); 58852942Sbrian 58952942Sbrian log_Printf(LogDEBUG, "Connecting netgraph socket .:%s -> %s:%s\n", 59052942Sbrian ngc.ourhook, ngc.path, ngc.peerhook); 59152942Sbrian if (NgSendMsg(dev->cs, ".:", NGM_GENERIC_COOKIE, 59252942Sbrian NGM_CONNECT, &ngc, sizeof ngc) < 0) { 59352942Sbrian log_Printf(LogWARN, "Cannot connect PPPoE and socket netgraph " 59452942Sbrian "nodes: %s\n", strerror(errno)); 59552942Sbrian return ether_Abandon(dev, p); 59652942Sbrian } 59752942Sbrian 59852942Sbrian /* And finally, request a connection to the given provider */ 59952942Sbrian 60068032Sbrian data = (struct ngpppoe_init_data *)alloca(sizeof *data + providerlen); 60152942Sbrian snprintf(data->hook, sizeof data->hook, "%s", dev->hook); 60268846Sbrian memcpy(data->data, provider, providerlen); 60368846Sbrian data->data_len = providerlen; 60452942Sbrian 60552942Sbrian snprintf(connectpath, sizeof connectpath, ".:%s", dev->hook); 60652942Sbrian log_Printf(LogDEBUG, "Sending PPPOE_CONNECT to %s\n", connectpath); 60752942Sbrian if (NgSendMsg(dev->cs, connectpath, NGM_PPPOE_COOKIE, 60852942Sbrian NGM_PPPOE_CONNECT, data, sizeof *data + providerlen) == -1) { 60952942Sbrian log_Printf(LogWARN, "``%s'': Cannot start netgraph node: %s\n", 61052942Sbrian connectpath, strerror(errno)); 61152942Sbrian return ether_Abandon(dev, p); 61252942Sbrian } 61352942Sbrian 61453062Sbrian /* Hook things up so that we monitor dev->cs */ 61553062Sbrian p->desc.UpdateSet = ether_UpdateSet; 61653062Sbrian p->desc.IsSet = ether_IsSet; 61753062Sbrian p->desc.Read = ether_DescriptorRead; 61853733Sbrian 61953733Sbrian memcpy(&dev->dev, &baseetherdevice, sizeof dev->dev); 62053733Sbrian switch (p->cfg.cd.necessity) { 62153733Sbrian case CD_VARIABLE: 62253733Sbrian dev->dev.cd.delay = p->cfg.cd.delay; 62353733Sbrian break; 62453733Sbrian case CD_REQUIRED: 62553733Sbrian dev->dev.cd = p->cfg.cd; 62653733Sbrian break; 62753733Sbrian case CD_NOTREQUIRED: 62853733Sbrian log_Printf(LogWARN, "%s: Carrier must be set, using ``set cd %d!''\n", 62953733Sbrian p->link.name, dev->dev.cd.delay); 63053733Sbrian case CD_DEFAULT: 63153733Sbrian break; 63253733Sbrian } 63353733Sbrian 63453733Sbrian dev->timeout = dev->dev.cd.delay; 63553733Sbrian dev->connected = CARRIER_PENDING; 63653733Sbrian 63752942Sbrian } else { 63852942Sbrian /* See if we're a netgraph socket */ 63971006Sbrian struct stat st; 64052942Sbrian 64171006Sbrian if (fstat(p->fd, &st) != -1 && (st.st_mode & S_IFSOCK)) { 64271006Sbrian struct sockaddr_storage ssock; 64371006Sbrian struct sockaddr *sock = (struct sockaddr *)&ssock; 64471006Sbrian int sz; 64552942Sbrian 64671006Sbrian sz = sizeof ssock; 64771006Sbrian if (getsockname(p->fd, sock, &sz) == -1) { 64871006Sbrian log_Printf(LogPHASE, "%s: Link is a closed socket !\n", p->link.name); 64971006Sbrian close(p->fd); 65071006Sbrian p->fd = -1; 65152942Sbrian return NULL; 65252942Sbrian } 65352942Sbrian 65471006Sbrian if (sock->sa_family == AF_NETGRAPH) { 65571006Sbrian /* 65671006Sbrian * It's a netgraph node... We can't determine hook names etc, so we 65771006Sbrian * stay pretty impartial.... 65871006Sbrian */ 65971006Sbrian log_Printf(LogPHASE, "%s: Link is a netgraph node\n", p->link.name); 66071006Sbrian 66171006Sbrian if ((dev = malloc(sizeof *dev)) == NULL) { 66271006Sbrian log_Printf(LogWARN, "%s: Cannot allocate an ether device: %s\n", 66371006Sbrian p->link.name, strerror(errno)); 66471006Sbrian return NULL; 66571006Sbrian } 66671006Sbrian 66771006Sbrian memcpy(&dev->dev, &baseetherdevice, sizeof dev->dev); 66871006Sbrian dev->cs = -1; 66971006Sbrian dev->timeout = 0; 67071006Sbrian dev->connected = CARRIER_OK; 67171006Sbrian *dev->hook = '\0'; 67271006Sbrian } 67352942Sbrian } 67452942Sbrian } 67552942Sbrian 67652942Sbrian if (dev) { 67752942Sbrian physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNCNOACF); 67852942Sbrian 67974916Sbrian if (path != NULL) { 68074916Sbrian /* Mark the interface as UP if it's not already */ 68174916Sbrian 68274916Sbrian path[ifacelen] = '\0'; /* Remove the trailing ':' */ 68374916Sbrian if (!iface_SetFlags(path, IFF_UP)) 68474916Sbrian log_Printf(LogWARN, "%s: Failed to set the IFF_UP flag on %s\n", 68574916Sbrian p->link.name, path); 68674916Sbrian } 68774916Sbrian 68852942Sbrian return &dev->dev; 68952942Sbrian } 69052942Sbrian 69152942Sbrian return NULL; 69252942Sbrian} 693