ether.c revision 98638
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 98638 2002-06-22 21:01:47Z 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> 5271006Sbrian#include <sys/stat.h> 5352942Sbrian#include <sys/uio.h> 5452942Sbrian#include <termios.h> 5552942Sbrian#include <sys/time.h> 5696582Sbrian#include <syslog.h> 5752942Sbrian#include <unistd.h> 5852942Sbrian 5952942Sbrian#include "layer.h" 6052942Sbrian#include "defs.h" 6152942Sbrian#include "mbuf.h" 6252942Sbrian#include "log.h" 6352942Sbrian#include "timer.h" 6452942Sbrian#include "lqr.h" 6552942Sbrian#include "hdlc.h" 6652942Sbrian#include "throughput.h" 6752942Sbrian#include "fsm.h" 6852942Sbrian#include "lcp.h" 6952942Sbrian#include "ccp.h" 7052942Sbrian#include "link.h" 7152942Sbrian#include "async.h" 7252942Sbrian#include "descriptor.h" 7352942Sbrian#include "physical.h" 7452942Sbrian#include "main.h" 7552942Sbrian#include "mp.h" 7652942Sbrian#include "chat.h" 7752942Sbrian#include "auth.h" 7852942Sbrian#include "chap.h" 7952942Sbrian#include "cbcp.h" 8052942Sbrian#include "datalink.h" 8152942Sbrian#include "slcompress.h" 8252942Sbrian#include "iplist.h" 8381634Sbrian#include "ncpaddr.h" 8481634Sbrian#include "ip.h" 8552942Sbrian#include "ipcp.h" 8652942Sbrian#include "filter.h" 8752942Sbrian#ifndef NORADIUS 8852942Sbrian#include "radius.h" 8952942Sbrian#endif 9081634Sbrian#include "ipv6cp.h" 9181634Sbrian#include "ncp.h" 9252942Sbrian#include "bundle.h" 9352942Sbrian#include "id.h" 9474916Sbrian#include "iface.h" 9596582Sbrian#include "route.h" 9652942Sbrian#include "ether.h" 9752942Sbrian 9852942Sbrian 9952942Sbrian#define PPPOE_NODE_TYPE_LEN (sizeof NG_PPPOE_NODE_TYPE - 1) /* "PPPoE" */ 10052942Sbrian 10152942Sbrianstruct etherdevice { 10252942Sbrian struct device dev; /* What struct physical knows about */ 10352942Sbrian int cs; /* Control socket */ 10452942Sbrian int connected; /* Are we connected yet ? */ 10552942Sbrian int timeout; /* Seconds attempting to connect */ 10652942Sbrian char hook[sizeof TUN_NAME + 11]; /* Our socket node hook */ 10796582Sbrian u_int32_t slot; /* ifindex << 24 | unit */ 10852942Sbrian}; 10952942Sbrian 11052942Sbrian#define device2ether(d) \ 11152942Sbrian ((d)->type == ETHER_DEVICE ? (struct etherdevice *)d : NULL) 11252942Sbrian 11352942Sbrianint 11452942Sbrianether_DeviceSize(void) 11552942Sbrian{ 11652942Sbrian return sizeof(struct etherdevice); 11752942Sbrian} 11852942Sbrian 11952942Sbrianstatic ssize_t 12052942Sbrianether_Write(struct physical *p, const void *v, size_t n) 12152942Sbrian{ 12252942Sbrian struct etherdevice *dev = device2ether(p->handler); 12352942Sbrian 12452942Sbrian return NgSendData(p->fd, dev->hook, v, n) == -1 ? -1 : n; 12552942Sbrian} 12652942Sbrian 12752942Sbrianstatic ssize_t 12852942Sbrianether_Read(struct physical *p, void *v, size_t n) 12952942Sbrian{ 13052942Sbrian char hook[sizeof TUN_NAME + 11]; 13152942Sbrian 13252942Sbrian return NgRecvData(p->fd, v, n, hook); 13352942Sbrian} 13452942Sbrian 13552942Sbrianstatic int 13652942Sbrianether_RemoveFromSet(struct physical *p, fd_set *r, fd_set *w, fd_set *e) 13752942Sbrian{ 13852942Sbrian struct etherdevice *dev = device2ether(p->handler); 13952942Sbrian int result; 14052942Sbrian 14152942Sbrian if (r && dev->cs >= 0 && FD_ISSET(dev->cs, r)) { 14252942Sbrian FD_CLR(dev->cs, r); 14352942Sbrian log_Printf(LogTIMER, "%s: fdunset(ctrl) %d\n", p->link.name, dev->cs); 14452942Sbrian result = 1; 14552942Sbrian } else 14652942Sbrian result = 0; 14752942Sbrian 14852942Sbrian /* Careful... physical_RemoveFromSet() called us ! */ 14952942Sbrian 15052942Sbrian p->handler->removefromset = NULL; 15152942Sbrian result += physical_RemoveFromSet(p, r, w, e); 15252942Sbrian p->handler->removefromset = ether_RemoveFromSet; 15352942Sbrian 15452942Sbrian return result; 15552942Sbrian} 15652942Sbrian 15752942Sbrianstatic void 15852942Sbrianether_Free(struct physical *p) 15952942Sbrian{ 16052942Sbrian struct etherdevice *dev = device2ether(p->handler); 16152942Sbrian 16252942Sbrian physical_SetDescriptor(p); 16352942Sbrian if (dev->cs != -1) 16452942Sbrian close(dev->cs); 16552942Sbrian free(dev); 16652942Sbrian} 16752942Sbrian 16852942Sbrianstatic const char * 16952942Sbrianether_OpenInfo(struct physical *p) 17052942Sbrian{ 17152942Sbrian struct etherdevice *dev = device2ether(p->handler); 17252942Sbrian 17352942Sbrian switch (dev->connected) { 17452942Sbrian case CARRIER_PENDING: 17552942Sbrian return "negotiating"; 17652942Sbrian case CARRIER_OK: 17752942Sbrian return "established"; 17852942Sbrian } 17952942Sbrian 18052942Sbrian return "disconnected"; 18152942Sbrian} 18252942Sbrian 18396582Sbrianstatic int 18496582Sbrianether_Slot(struct physical *p) 18596582Sbrian{ 18696582Sbrian struct etherdevice *dev = device2ether(p->handler); 18796582Sbrian 18896582Sbrian return dev->slot; 18996582Sbrian} 19096582Sbrian 19196582Sbrian 19252942Sbrianstatic void 19352942Sbrianether_device2iov(struct device *d, struct iovec *iov, int *niov, 19453684Sbrian int maxiov, int *auxfd, int *nauxfd) 19552942Sbrian{ 19652942Sbrian struct etherdevice *dev = device2ether(d); 19752942Sbrian int sz = physical_MaxDeviceSize(); 19852942Sbrian 19952942Sbrian iov[*niov].iov_base = realloc(d, sz); 20052942Sbrian if (iov[*niov].iov_base == NULL) { 20152942Sbrian log_Printf(LogALERT, "Failed to allocate memory: %d\n", sz); 20252942Sbrian AbortProgram(EX_OSERR); 20352942Sbrian } 20452942Sbrian iov[*niov].iov_len = sz; 20552942Sbrian (*niov)++; 20652942Sbrian 20752942Sbrian if (dev->cs >= 0) { 20852942Sbrian *auxfd = dev->cs; 20952942Sbrian (*nauxfd)++; 21052942Sbrian } 21152942Sbrian} 21252942Sbrian 21352942Sbrianstatic void 21452942Sbrianether_MessageIn(struct etherdevice *dev) 21552942Sbrian{ 21652942Sbrian char msgbuf[sizeof(struct ng_mesg) + sizeof(struct ngpppoe_sts)]; 21752942Sbrian struct ng_mesg *rep = (struct ng_mesg *)msgbuf; 21852942Sbrian struct ngpppoe_sts *sts = (struct ngpppoe_sts *)(msgbuf + sizeof *rep); 21996582Sbrian char *end, unknown[14], sessionid[5]; 22052942Sbrian const char *msg; 22152942Sbrian struct timeval t; 22266898Sbrian fd_set *r; 22396582Sbrian u_long slot; 22498638Sbrian int asciilen, ret; 22552942Sbrian 22652942Sbrian if (dev->cs < 0) 22752942Sbrian return; 22852942Sbrian 22966898Sbrian if ((r = mkfdset()) == NULL) { 23066898Sbrian log_Printf(LogERROR, "DoLoop: Cannot create fd_set\n"); 23166898Sbrian return; 23266898Sbrian } 23366898Sbrian zerofdset(r); 23466898Sbrian FD_SET(dev->cs, r); 23552942Sbrian t.tv_sec = t.tv_usec = 0; 23666898Sbrian ret = select(dev->cs + 1, r, NULL, NULL, &t); 23766898Sbrian free(r); 23866898Sbrian 23966898Sbrian if (ret <= 0) 24052942Sbrian return; 24152942Sbrian 24282277Sbrian if (NgRecvMsg(dev->cs, rep, sizeof msgbuf, NULL) <= 0) 24352942Sbrian return; 24452942Sbrian 24552942Sbrian if (rep->header.version != NG_VERSION) { 24652942Sbrian log_Printf(LogWARN, "%ld: Unexpected netgraph version, expected %ld\n", 24752942Sbrian (long)rep->header.version, (long)NG_VERSION); 24852942Sbrian return; 24952942Sbrian } 25052942Sbrian 25152942Sbrian if (rep->header.typecookie != NGM_PPPOE_COOKIE) { 25252942Sbrian log_Printf(LogWARN, "%ld: Unexpected netgraph cookie, expected %ld\n", 25352942Sbrian (long)rep->header.typecookie, (long)NGM_PPPOE_COOKIE); 25452942Sbrian return; 25552942Sbrian } 25652942Sbrian 25798638Sbrian asciilen = 0; 25852942Sbrian switch (rep->header.cmd) { 25952942Sbrian case NGM_PPPOE_SET_FLAG: msg = "SET_FLAG"; break; 26052942Sbrian case NGM_PPPOE_CONNECT: msg = "CONNECT"; break; 26152942Sbrian case NGM_PPPOE_LISTEN: msg = "LISTEN"; break; 26252942Sbrian case NGM_PPPOE_OFFER: msg = "OFFER"; break; 26352942Sbrian case NGM_PPPOE_SUCCESS: msg = "SUCCESS"; break; 26452942Sbrian case NGM_PPPOE_FAIL: msg = "FAIL"; break; 26552942Sbrian case NGM_PPPOE_CLOSE: msg = "CLOSE"; break; 26652942Sbrian case NGM_PPPOE_GET_STATUS: msg = "GET_STATUS"; break; 26790975Sbrian case NGM_PPPOE_ACNAME: 26890975Sbrian msg = "ACNAME"; 26990975Sbrian if (setenv("ACNAME", sts->hook, 1) != 0) 27090975Sbrian log_Printf(LogWARN, "setenv: cannot set ACNAME=%s: %m", sts->hook); 27198638Sbrian asciilen = rep->header.arglen; 27290975Sbrian break; 27396582Sbrian case NGM_PPPOE_SESSIONID: 27496582Sbrian msg = "SESSIONID"; 27596582Sbrian snprintf(sessionid, sizeof sessionid, "%04x", *(u_int16_t *)sts); 27696582Sbrian if (setenv("SESSIONID", sessionid, 1) != 0) 27796582Sbrian syslog(LOG_WARNING, "setenv: cannot set SESSIONID=%s: %m", 27896582Sbrian sessionid); 27996582Sbrian /* Use this in preference to our interface index */ 28096582Sbrian slot = strtoul(sessionid, &end, 16); 28196582Sbrian if (end != sessionid && *end == '\0') 28296582Sbrian dev->slot = slot; 28396582Sbrian break; 28452942Sbrian default: 28552942Sbrian snprintf(unknown, sizeof unknown, "<%d>", (int)rep->header.cmd); 28652942Sbrian msg = unknown; 28752942Sbrian break; 28852942Sbrian } 28952942Sbrian 29098638Sbrian if (asciilen) 29198638Sbrian log_Printf(LogPHASE, "Received NGM_PPPOE_%s (hook \"%.*s\")\n", 29298638Sbrian msg, asciilen, sts->hook); 29398638Sbrian else 29498638Sbrian log_Printf(LogPHASE, "Received NGM_PPPOE_%s\n", msg); 29552942Sbrian 29652942Sbrian switch (rep->header.cmd) { 29752942Sbrian case NGM_PPPOE_SUCCESS: 29852942Sbrian dev->connected = CARRIER_OK; 29952942Sbrian break; 30052942Sbrian case NGM_PPPOE_FAIL: 30152942Sbrian case NGM_PPPOE_CLOSE: 30252942Sbrian dev->connected = CARRIER_LOST; 30352942Sbrian break; 30452942Sbrian } 30552942Sbrian} 30652942Sbrian 30752942Sbrianstatic int 30852942Sbrianether_AwaitCarrier(struct physical *p) 30952942Sbrian{ 31052942Sbrian struct etherdevice *dev = device2ether(p->handler); 31152942Sbrian 31253071Sbrian if (dev->connected != CARRIER_OK && !dev->timeout--) 31352942Sbrian dev->connected = CARRIER_LOST; 31452942Sbrian else if (dev->connected == CARRIER_PENDING) 31552942Sbrian ether_MessageIn(dev); 31652942Sbrian 31752942Sbrian return dev->connected; 31852942Sbrian} 31952942Sbrian 32052942Sbrianstatic const struct device baseetherdevice = { 32152942Sbrian ETHER_DEVICE, 32252942Sbrian "ether", 32378410Sbrian 1492, 32453733Sbrian { CD_REQUIRED, DEF_ETHERCDDELAY }, 32552942Sbrian ether_AwaitCarrier, 32652942Sbrian ether_RemoveFromSet, 32752942Sbrian NULL, 32852942Sbrian NULL, 32952942Sbrian NULL, 33052942Sbrian NULL, 33193418Sbrian NULL, 33252942Sbrian ether_Free, 33352942Sbrian ether_Read, 33452942Sbrian ether_Write, 33552942Sbrian ether_device2iov, 33652942Sbrian NULL, 33796582Sbrian ether_OpenInfo, 33896582Sbrian ether_Slot 33952942Sbrian}; 34052942Sbrian 34152942Sbrianstruct device * 34252942Sbrianether_iov2device(int type, struct physical *p, struct iovec *iov, int *niov, 34352942Sbrian int maxiov, int *auxfd, int *nauxfd) 34452942Sbrian{ 34552942Sbrian if (type == ETHER_DEVICE) { 34652942Sbrian struct etherdevice *dev = (struct etherdevice *)iov[(*niov)++].iov_base; 34752942Sbrian 34852942Sbrian dev = realloc(dev, sizeof *dev); /* Reduce to the correct size */ 34952942Sbrian if (dev == NULL) { 35052942Sbrian log_Printf(LogALERT, "Failed to allocate memory: %d\n", 35152942Sbrian (int)(sizeof *dev)); 35252942Sbrian AbortProgram(EX_OSERR); 35352942Sbrian } 35452942Sbrian 35552942Sbrian if (*nauxfd) { 35652942Sbrian dev->cs = *auxfd; 35752942Sbrian (*nauxfd)--; 35852942Sbrian } else 35952942Sbrian dev->cs = -1; 36052942Sbrian 36152942Sbrian /* Refresh function pointers etc */ 36252942Sbrian memcpy(&dev->dev, &baseetherdevice, sizeof dev->dev); 36352942Sbrian 36452942Sbrian physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNCNOACF); 36552942Sbrian return &dev->dev; 36652942Sbrian } 36752942Sbrian 36852942Sbrian return NULL; 36952942Sbrian} 37052942Sbrian 37152942Sbrianstatic int 37258028Sbrianether_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n) 37352942Sbrian{ 37452942Sbrian struct physical *p = descriptor2physical(d); 37552942Sbrian struct etherdevice *dev = device2ether(p->handler); 37652942Sbrian int result; 37752942Sbrian 37852942Sbrian if (r && dev->cs >= 0) { 37952942Sbrian FD_SET(dev->cs, r); 38052942Sbrian log_Printf(LogTIMER, "%s(ctrl): fdset(r) %d\n", p->link.name, dev->cs); 38152942Sbrian result = 1; 38252942Sbrian } else 38352942Sbrian result = 0; 38452942Sbrian 38552942Sbrian result += physical_doUpdateSet(d, r, w, e, n, 0); 38652942Sbrian 38752942Sbrian return result; 38852942Sbrian} 38952942Sbrian 39052942Sbrianstatic int 39158028Sbrianether_IsSet(struct fdescriptor *d, const fd_set *fdset) 39252942Sbrian{ 39352942Sbrian struct physical *p = descriptor2physical(d); 39452942Sbrian struct etherdevice *dev = device2ether(p->handler); 39552942Sbrian int result; 39652942Sbrian 39752942Sbrian result = dev->cs >= 0 && FD_ISSET(dev->cs, fdset); 39852942Sbrian result += physical_IsSet(d, fdset); 39952942Sbrian 40052942Sbrian return result; 40152942Sbrian} 40252942Sbrian 40352942Sbrianstatic void 40458028Sbrianether_DescriptorRead(struct fdescriptor *d, struct bundle *bundle, 40552942Sbrian const fd_set *fdset) 40652942Sbrian{ 40752942Sbrian struct physical *p = descriptor2physical(d); 40852942Sbrian struct etherdevice *dev = device2ether(p->handler); 40952942Sbrian 41052942Sbrian if (dev->cs >= 0 && FD_ISSET(dev->cs, fdset)) { 41152942Sbrian ether_MessageIn(dev); 41252942Sbrian if (dev->connected == CARRIER_LOST) { 41352942Sbrian log_Printf(LogPHASE, "%s: Device disconnected\n", p->link.name); 41452942Sbrian datalink_Down(p->dl, CLOSE_NORMAL); 41552942Sbrian return; 41652942Sbrian } 41752942Sbrian } 41852942Sbrian 41952942Sbrian if (physical_IsSet(d, fdset)) 42052942Sbrian physical_DescriptorRead(d, bundle, fdset); 42152942Sbrian} 42252942Sbrian 42352942Sbrianstatic struct device * 42452942Sbrianether_Abandon(struct etherdevice *dev, struct physical *p) 42552942Sbrian{ 42652942Sbrian /* Abandon our node construction */ 42752942Sbrian close(dev->cs); 42852942Sbrian close(p->fd); 42952942Sbrian p->fd = -2; /* Nobody else need try.. */ 43052942Sbrian free(dev); 43152942Sbrian 43252942Sbrian return NULL; 43352942Sbrian} 43452942Sbrian 43552942Sbrianstruct device * 43652942Sbrianether_Create(struct physical *p) 43752942Sbrian{ 43852942Sbrian u_char rbuf[2048]; 43952942Sbrian struct etherdevice *dev; 44052942Sbrian struct ng_mesg *resp; 44152942Sbrian const struct hooklist *hlist; 44252942Sbrian const struct nodeinfo *ninfo; 44396582Sbrian char *path, *sessionid; 44474916Sbrian int ifacelen, f; 44552942Sbrian 44652942Sbrian dev = NULL; 44774916Sbrian path = NULL; 44874916Sbrian ifacelen = 0; 44952942Sbrian if (p->fd < 0 && !strncasecmp(p->name.full, NG_PPPOE_NODE_TYPE, 45052942Sbrian PPPOE_NODE_TYPE_LEN) && 45152942Sbrian p->name.full[PPPOE_NODE_TYPE_LEN] == ':') { 45252942Sbrian const struct linkinfo *nlink; 45352942Sbrian struct ngpppoe_init_data *data; 45452942Sbrian struct ngm_mkpeer mkp; 45552942Sbrian struct ngm_connect ngc; 45652942Sbrian const char *iface, *provider; 45774916Sbrian char etherid[12]; 45874916Sbrian int providerlen; 45952942Sbrian char connectpath[sizeof dev->hook + 2]; /* .:<hook> */ 46052942Sbrian 46152942Sbrian p->fd--; /* We own the device - change fd */ 46252942Sbrian 46393418Sbrian loadmodules(LOAD_VERBOSLY, "netgraph", "ng_ether", "ng_pppoe", "ng_socket", 46493418Sbrian NULL); 46552942Sbrian 46652942Sbrian if ((dev = malloc(sizeof *dev)) == NULL) 46752942Sbrian return NULL; 46852942Sbrian 46952942Sbrian iface = p->name.full + PPPOE_NODE_TYPE_LEN + 1; 47052942Sbrian 47152942Sbrian provider = strchr(iface, ':'); 47252942Sbrian if (provider) { 47352942Sbrian ifacelen = provider - iface; 47452942Sbrian provider++; 47552942Sbrian providerlen = strlen(provider); 47652942Sbrian } else { 47752942Sbrian ifacelen = strlen(iface); 47852942Sbrian provider = ""; 47952942Sbrian providerlen = 0; 48052942Sbrian } 48152942Sbrian 48252942Sbrian /* 48352942Sbrian * We're going to do this (where tunN is our tunnel device): 48452942Sbrian * 48552942Sbrian * .---------. 48652942Sbrian * | ether | 48752942Sbrian * | <iface> | dev->cs 48852942Sbrian * `---------' | 48952942Sbrian * (orphan) p->fd | 49052942Sbrian * | | | 49152942Sbrian * | | | 49252942Sbrian * (ethernet) | | 49352942Sbrian * .---------. .-----------. 49452942Sbrian * | pppoe | | socket | 49552942Sbrian * | <iface> |(tunN)<---->(tunN)| <unnamed> | 49652942Sbrian * `--------- `-----------' 49752942Sbrian * (tunX) 49852942Sbrian * ^ 49952942Sbrian * | 50052942Sbrian * `--->(tunX) 50152942Sbrian */ 50252942Sbrian 50352942Sbrian /* Create a socket node */ 50453535Sbrian if (ID0NgMkSockNode(NULL, &dev->cs, &p->fd) == -1) { 50552942Sbrian log_Printf(LogWARN, "Cannot create netgraph socket node: %s\n", 50652942Sbrian strerror(errno)); 50752942Sbrian free(dev); 50893418Sbrian p->fd = -2; 50952942Sbrian return NULL; 51052942Sbrian } 51152942Sbrian 51252942Sbrian /* 51352942Sbrian * Ask for a list of hooks attached to the "ether" node. This node should 51452942Sbrian * magically exist as a way of hooking stuff onto an ethernet device 51552942Sbrian */ 51652942Sbrian path = (char *)alloca(ifacelen + 2); 51752942Sbrian sprintf(path, "%.*s:", ifacelen, iface); 51852942Sbrian if (NgSendMsg(dev->cs, path, NGM_GENERIC_COOKIE, NGM_LISTHOOKS, 51952942Sbrian NULL, 0) < 0) { 52052942Sbrian log_Printf(LogWARN, "%s Cannot send a netgraph message: %s\n", 52152942Sbrian path, strerror(errno)); 52252942Sbrian return ether_Abandon(dev, p); 52352942Sbrian } 52452942Sbrian 52552942Sbrian /* Get our list back */ 52652942Sbrian resp = (struct ng_mesg *)rbuf; 52782277Sbrian if (NgRecvMsg(dev->cs, resp, sizeof rbuf, NULL) <= 0) { 52852942Sbrian log_Printf(LogWARN, "Cannot get netgraph response: %s\n", 52952942Sbrian strerror(errno)); 53052942Sbrian return ether_Abandon(dev, p); 53152942Sbrian } 53252942Sbrian 53352942Sbrian hlist = (const struct hooklist *)resp->data; 53452942Sbrian ninfo = &hlist->nodeinfo; 53552942Sbrian 53652942Sbrian /* Make sure we've got the right type of node */ 53752942Sbrian if (strncmp(ninfo->type, NG_ETHER_NODE_TYPE, 53852942Sbrian sizeof NG_ETHER_NODE_TYPE - 1)) { 53952942Sbrian log_Printf(LogWARN, "%s Unexpected node type ``%s'' (wanted ``" 54052942Sbrian NG_ETHER_NODE_TYPE "'')\n", path, ninfo->type); 54152942Sbrian return ether_Abandon(dev, p); 54252942Sbrian } 54352942Sbrian 54452963Sbrian log_Printf(LogDEBUG, "List of netgraph node ``%s'' (id %x) hooks:\n", 54552942Sbrian path, ninfo->id); 54652942Sbrian 54752942Sbrian /* look for a hook already attached. */ 54852942Sbrian for (f = 0; f < ninfo->hooks; f++) { 54952942Sbrian nlink = &hlist->link[f]; 55052942Sbrian 55152942Sbrian log_Printf(LogDEBUG, " Found %s -> %s\n", nlink->ourhook, 55252942Sbrian nlink->peerhook); 55352942Sbrian 55452942Sbrian if (!strcmp(nlink->ourhook, NG_ETHER_HOOK_ORPHAN) || 55552942Sbrian !strcmp(nlink->ourhook, NG_ETHER_HOOK_DIVERT)) { 55652942Sbrian /* 55752942Sbrian * Something is using the data coming out of this ``ether'' node. 55852942Sbrian * If it's a PPPoE node, we use that node, otherwise we complain that 55952942Sbrian * someone else is using the node. 56052942Sbrian */ 56152942Sbrian if (!strcmp(nlink->nodeinfo.type, NG_PPPOE_NODE_TYPE)) 56252942Sbrian /* Use this PPPoE node ! */ 56352963Sbrian snprintf(ngc.path, sizeof ngc.path, "[%x]:", nlink->nodeinfo.id); 56452942Sbrian else { 56552942Sbrian log_Printf(LogWARN, "%s Node type ``%s'' is currently active\n", 56652942Sbrian path, nlink->nodeinfo.type); 56752942Sbrian return ether_Abandon(dev, p); 56852942Sbrian } 56952942Sbrian break; 57052942Sbrian } 57152942Sbrian } 57252942Sbrian 57352942Sbrian if (f == ninfo->hooks) { 57452942Sbrian /* 57552942Sbrian * Create a new ``PPPoE'' node connected to the ``ether'' node using 57693418Sbrian * the ``orphan'' and ``ethernet'' hooks 57752942Sbrian */ 57852942Sbrian snprintf(mkp.type, sizeof mkp.type, "%s", NG_PPPOE_NODE_TYPE); 57952942Sbrian snprintf(mkp.ourhook, sizeof mkp.ourhook, "%s", NG_ETHER_HOOK_ORPHAN); 58052942Sbrian snprintf(mkp.peerhook, sizeof mkp.peerhook, "%s", NG_PPPOE_HOOK_ETHERNET); 58152963Sbrian snprintf(etherid, sizeof etherid, "[%x]:", ninfo->id); 58252942Sbrian 58352942Sbrian log_Printf(LogDEBUG, "Creating PPPoE netgraph node %s%s -> %s\n", 58452942Sbrian etherid, mkp.ourhook, mkp.peerhook); 58552942Sbrian 58652942Sbrian if (NgSendMsg(dev->cs, etherid, NGM_GENERIC_COOKIE, 58752942Sbrian NGM_MKPEER, &mkp, sizeof mkp) < 0) { 58852942Sbrian log_Printf(LogWARN, "%s Cannot create PPPoE netgraph node: %s\n", 58952942Sbrian etherid, strerror(errno)); 59052942Sbrian return ether_Abandon(dev, p); 59152942Sbrian } 59252942Sbrian 59352942Sbrian snprintf(ngc.path, sizeof ngc.path, "%s%s", path, NG_ETHER_HOOK_ORPHAN); 59452942Sbrian } 59552942Sbrian 59652942Sbrian snprintf(dev->hook, sizeof dev->hook, "%s%d", 59752942Sbrian TUN_NAME, p->dl->bundle->unit); 59852942Sbrian 59952942Sbrian /* 60052942Sbrian * Connect the PPPoE node to our socket node. 60152942Sbrian * ngc.path has already been set up 60252942Sbrian */ 60352942Sbrian snprintf(ngc.ourhook, sizeof ngc.ourhook, "%s", dev->hook); 60452942Sbrian memcpy(ngc.peerhook, ngc.ourhook, sizeof ngc.peerhook); 60552942Sbrian 60652942Sbrian log_Printf(LogDEBUG, "Connecting netgraph socket .:%s -> %s:%s\n", 60752942Sbrian ngc.ourhook, ngc.path, ngc.peerhook); 60852942Sbrian if (NgSendMsg(dev->cs, ".:", NGM_GENERIC_COOKIE, 60952942Sbrian NGM_CONNECT, &ngc, sizeof ngc) < 0) { 61052942Sbrian log_Printf(LogWARN, "Cannot connect PPPoE and socket netgraph " 61152942Sbrian "nodes: %s\n", strerror(errno)); 61252942Sbrian return ether_Abandon(dev, p); 61352942Sbrian } 61452942Sbrian 61579854Sbrian /* Bring the Ethernet interface up */ 61679854Sbrian path[ifacelen] = '\0'; /* Remove the trailing ':' */ 61779854Sbrian if (!iface_SetFlags(path, IFF_UP)) 61879854Sbrian log_Printf(LogWARN, "%s: Failed to set the IFF_UP flag on %s\n", 61979854Sbrian p->link.name, path); 62079854Sbrian 62152942Sbrian /* And finally, request a connection to the given provider */ 62252942Sbrian 62368032Sbrian data = (struct ngpppoe_init_data *)alloca(sizeof *data + providerlen); 62452942Sbrian snprintf(data->hook, sizeof data->hook, "%s", dev->hook); 62568846Sbrian memcpy(data->data, provider, providerlen); 62668846Sbrian data->data_len = providerlen; 62752942Sbrian 62852942Sbrian snprintf(connectpath, sizeof connectpath, ".:%s", dev->hook); 62952942Sbrian log_Printf(LogDEBUG, "Sending PPPOE_CONNECT to %s\n", connectpath); 63052942Sbrian if (NgSendMsg(dev->cs, connectpath, NGM_PPPOE_COOKIE, 63152942Sbrian NGM_PPPOE_CONNECT, data, sizeof *data + providerlen) == -1) { 63252942Sbrian log_Printf(LogWARN, "``%s'': Cannot start netgraph node: %s\n", 63352942Sbrian connectpath, strerror(errno)); 63452942Sbrian return ether_Abandon(dev, p); 63552942Sbrian } 63652942Sbrian 63753062Sbrian /* Hook things up so that we monitor dev->cs */ 63853062Sbrian p->desc.UpdateSet = ether_UpdateSet; 63953062Sbrian p->desc.IsSet = ether_IsSet; 64053062Sbrian p->desc.Read = ether_DescriptorRead; 64153733Sbrian 64253733Sbrian memcpy(&dev->dev, &baseetherdevice, sizeof dev->dev); 64353733Sbrian switch (p->cfg.cd.necessity) { 64453733Sbrian case CD_VARIABLE: 64553733Sbrian dev->dev.cd.delay = p->cfg.cd.delay; 64653733Sbrian break; 64753733Sbrian case CD_REQUIRED: 64853733Sbrian dev->dev.cd = p->cfg.cd; 64953733Sbrian break; 65053733Sbrian case CD_NOTREQUIRED: 65153733Sbrian log_Printf(LogWARN, "%s: Carrier must be set, using ``set cd %d!''\n", 65253733Sbrian p->link.name, dev->dev.cd.delay); 65353733Sbrian case CD_DEFAULT: 65453733Sbrian break; 65553733Sbrian } 65653733Sbrian 65753733Sbrian dev->timeout = dev->dev.cd.delay; 65853733Sbrian dev->connected = CARRIER_PENDING; 65996582Sbrian /* This will be overridden by our session id - if provided by netgraph */ 66096582Sbrian dev->slot = GetIfIndex(path); 66152942Sbrian } else { 66252942Sbrian /* See if we're a netgraph socket */ 66371006Sbrian struct stat st; 66452942Sbrian 66571006Sbrian if (fstat(p->fd, &st) != -1 && (st.st_mode & S_IFSOCK)) { 66671006Sbrian struct sockaddr_storage ssock; 66771006Sbrian struct sockaddr *sock = (struct sockaddr *)&ssock; 66871006Sbrian int sz; 66952942Sbrian 67071006Sbrian sz = sizeof ssock; 67171006Sbrian if (getsockname(p->fd, sock, &sz) == -1) { 67271006Sbrian log_Printf(LogPHASE, "%s: Link is a closed socket !\n", p->link.name); 67371006Sbrian close(p->fd); 67471006Sbrian p->fd = -1; 67552942Sbrian return NULL; 67652942Sbrian } 67752942Sbrian 67871006Sbrian if (sock->sa_family == AF_NETGRAPH) { 67971006Sbrian /* 68071006Sbrian * It's a netgraph node... We can't determine hook names etc, so we 68171006Sbrian * stay pretty impartial.... 68271006Sbrian */ 68371006Sbrian log_Printf(LogPHASE, "%s: Link is a netgraph node\n", p->link.name); 68471006Sbrian 68571006Sbrian if ((dev = malloc(sizeof *dev)) == NULL) { 68671006Sbrian log_Printf(LogWARN, "%s: Cannot allocate an ether device: %s\n", 68771006Sbrian p->link.name, strerror(errno)); 68871006Sbrian return NULL; 68971006Sbrian } 69071006Sbrian 69171006Sbrian memcpy(&dev->dev, &baseetherdevice, sizeof dev->dev); 69271006Sbrian dev->cs = -1; 69371006Sbrian dev->timeout = 0; 69471006Sbrian dev->connected = CARRIER_OK; 69571006Sbrian *dev->hook = '\0'; 69696582Sbrian 69796582Sbrian /* 69896582Sbrian * If we're being envoked from pppoed(8), we may have a SESSIONID 69996582Sbrian * set in the environment. If so, use it as the slot 70096582Sbrian */ 70196582Sbrian if ((sessionid = getenv("SESSIONID")) != NULL) { 70296582Sbrian char *end; 70396582Sbrian u_long slot; 70496582Sbrian 70596582Sbrian slot = strtoul(sessionid, &end, 16); 70696582Sbrian dev->slot = end != sessionid && *end == '\0' ? slot : 0; 70796582Sbrian } else 70896582Sbrian dev->slot = 0; 70971006Sbrian } 71052942Sbrian } 71152942Sbrian } 71252942Sbrian 71352942Sbrian if (dev) { 71452942Sbrian physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNCNOACF); 71552942Sbrian return &dev->dev; 71652942Sbrian } 71752942Sbrian 71852942Sbrian return NULL; 71952942Sbrian} 720