diff options
Diffstat (limited to 'freebsd/sys/net/if_tap.c')
| -rw-r--r-- | freebsd/sys/net/if_tap.c | 1133 |
1 files changed, 0 insertions, 1133 deletions
diff --git a/freebsd/sys/net/if_tap.c b/freebsd/sys/net/if_tap.c deleted file mode 100644 index dbf3e599..00000000 --- a/freebsd/sys/net/if_tap.c +++ /dev/null @@ -1,1133 +0,0 @@ -#include <machine/rtems-bsd-kernel-space.h> - -/*- - * SPDX-License-Identifier: BSD-2-Clause-FreeBSD - * - * Copyright (C) 1999-2000 by Maksim Yevmenkin <m_evmenkin@yahoo.com> - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * BASED ON: - * ------------------------------------------------------------------------- - * - * Copyright (c) 1988, Julian Onions <jpo@cs.nott.ac.uk> - * Nottingham University 1987. - */ - -/* - * $FreeBSD$ - * $Id: if_tap.c,v 0.21 2000/07/23 21:46:02 max Exp $ - */ - -#include <rtems/bsd/local/opt_inet.h> - -#include <sys/param.h> -#include <sys/conf.h> -#include <sys/fcntl.h> -#include <sys/filio.h> -#include <sys/jail.h> -#include <sys/kernel.h> -#include <sys/malloc.h> -#include <sys/mbuf.h> -#include <sys/module.h> -#include <sys/poll.h> -#include <sys/priv.h> -#include <sys/proc.h> -#include <sys/selinfo.h> -#include <sys/signalvar.h> -#include <sys/socket.h> -#include <sys/sockio.h> -#include <sys/sysctl.h> -#include <sys/systm.h> -#include <sys/ttycom.h> -#include <sys/uio.h> -#include <sys/queue.h> - -#include <net/bpf.h> -#include <net/ethernet.h> -#include <net/if.h> -#include <net/if_var.h> -#include <net/if_clone.h> -#include <net/if_dl.h> -#include <net/if_media.h> -#include <net/if_types.h> -#include <net/route.h> -#include <net/vnet.h> - -#include <netinet/in.h> - -#include <net/if_tapvar.h> -#include <net/if_tap.h> - -#define CDEV_NAME "tap" -#define TAPDEBUG if (tapdebug) printf - -static const char tapname[] = "tap"; -static const char vmnetname[] = "vmnet"; -#define TAPMAXUNIT 0x7fff -#define VMNET_DEV_MASK CLONE_FLAG0 - -/* module */ -static int tapmodevent(module_t, int, void *); - -/* device */ -static void tapclone(void *, struct ucred *, char *, int, - struct cdev **); -static void tapcreate(struct cdev *); - -/* network interface */ -static void tapifstart(struct ifnet *); -static int tapifioctl(struct ifnet *, u_long, caddr_t); -static void tapifinit(void *); - -static int tap_clone_create(struct if_clone *, int, caddr_t); -static void tap_clone_destroy(struct ifnet *); -static struct if_clone *tap_cloner; -static int vmnet_clone_create(struct if_clone *, int, caddr_t); -static void vmnet_clone_destroy(struct ifnet *); -static struct if_clone *vmnet_cloner; - -/* character device */ -static d_open_t tapopen; -static d_close_t tapclose; -static d_read_t tapread; -static d_write_t tapwrite; -static d_ioctl_t tapioctl; -static d_poll_t tappoll; -static d_kqfilter_t tapkqfilter; - -/* kqueue(2) */ -static int tapkqread(struct knote *, long); -static int tapkqwrite(struct knote *, long); -static void tapkqdetach(struct knote *); - -static struct filterops tap_read_filterops = { - .f_isfd = 1, - .f_attach = NULL, - .f_detach = tapkqdetach, - .f_event = tapkqread, -}; - -static struct filterops tap_write_filterops = { - .f_isfd = 1, - .f_attach = NULL, - .f_detach = tapkqdetach, - .f_event = tapkqwrite, -}; - -static struct cdevsw tap_cdevsw = { - .d_version = D_VERSION, - .d_flags = D_NEEDMINOR, - .d_open = tapopen, - .d_close = tapclose, - .d_read = tapread, - .d_write = tapwrite, - .d_ioctl = tapioctl, - .d_poll = tappoll, - .d_name = CDEV_NAME, - .d_kqfilter = tapkqfilter, -}; - -/* - * All global variables in if_tap.c are locked with tapmtx, with the - * exception of tapdebug, which is accessed unlocked; tapclones is - * static at runtime. - */ -static struct mtx tapmtx; -static int tapdebug = 0; /* debug flag */ -static int tapuopen = 0; /* allow user open() */ -static int tapuponopen = 0; /* IFF_UP on open() */ -static int tapdclone = 1; /* enable devfs cloning */ -static SLIST_HEAD(, tap_softc) taphead; /* first device */ -static struct clonedevs *tapclones; - -MALLOC_DECLARE(M_TAP); -MALLOC_DEFINE(M_TAP, CDEV_NAME, "Ethernet tunnel interface"); -SYSCTL_INT(_debug, OID_AUTO, if_tap_debug, CTLFLAG_RW, &tapdebug, 0, ""); - -SYSCTL_DECL(_net_link); -static SYSCTL_NODE(_net_link, OID_AUTO, tap, CTLFLAG_RW, 0, - "Ethernet tunnel software network interface"); -SYSCTL_INT(_net_link_tap, OID_AUTO, user_open, CTLFLAG_RW, &tapuopen, 0, - "Allow user to open /dev/tap (based on node permissions)"); -SYSCTL_INT(_net_link_tap, OID_AUTO, up_on_open, CTLFLAG_RW, &tapuponopen, 0, - "Bring interface up when /dev/tap is opened"); -SYSCTL_INT(_net_link_tap, OID_AUTO, devfs_cloning, CTLFLAG_RWTUN, &tapdclone, 0, - "Enable legacy devfs interface creation"); -SYSCTL_INT(_net_link_tap, OID_AUTO, debug, CTLFLAG_RW, &tapdebug, 0, ""); - -DEV_MODULE(if_tap, tapmodevent, NULL); - -static int -tap_clone_create(struct if_clone *ifc, int unit, caddr_t params) -{ - struct cdev *dev; - int i; - - /* Find any existing device, or allocate new unit number. */ - i = clone_create(&tapclones, &tap_cdevsw, &unit, &dev, 0); - if (i) { - dev = make_dev(&tap_cdevsw, unit, UID_ROOT, GID_WHEEL, 0600, - "%s%d", tapname, unit); - } - - tapcreate(dev); - return (0); -} - -/* vmnet devices are tap devices in disguise */ -static int -vmnet_clone_create(struct if_clone *ifc, int unit, caddr_t params) -{ - struct cdev *dev; - int i; - - /* Find any existing device, or allocate new unit number. */ - i = clone_create(&tapclones, &tap_cdevsw, &unit, &dev, VMNET_DEV_MASK); - if (i) { - dev = make_dev(&tap_cdevsw, unit | VMNET_DEV_MASK, UID_ROOT, - GID_WHEEL, 0600, "%s%d", vmnetname, unit); - } - - tapcreate(dev); - return (0); -} - -static void -tap_destroy(struct tap_softc *tp) -{ - struct ifnet *ifp = tp->tap_ifp; - - CURVNET_SET(ifp->if_vnet); - destroy_dev(tp->tap_dev); - seldrain(&tp->tap_rsel); - knlist_clear(&tp->tap_rsel.si_note, 0); - knlist_destroy(&tp->tap_rsel.si_note); - ether_ifdetach(ifp); - if_free(ifp); - - mtx_destroy(&tp->tap_mtx); - free(tp, M_TAP); - CURVNET_RESTORE(); -} - -static void -tap_clone_destroy(struct ifnet *ifp) -{ - struct tap_softc *tp = ifp->if_softc; - - mtx_lock(&tapmtx); - SLIST_REMOVE(&taphead, tp, tap_softc, tap_next); - mtx_unlock(&tapmtx); - tap_destroy(tp); -} - -/* vmnet devices are tap devices in disguise */ -static void -vmnet_clone_destroy(struct ifnet *ifp) -{ - tap_clone_destroy(ifp); -} - -/* - * tapmodevent - * - * module event handler - */ -static int -tapmodevent(module_t mod, int type, void *data) -{ - static eventhandler_tag eh_tag = NULL; - struct tap_softc *tp = NULL; - struct ifnet *ifp = NULL; - - switch (type) { - case MOD_LOAD: - - /* intitialize device */ - - mtx_init(&tapmtx, "tapmtx", NULL, MTX_DEF); - SLIST_INIT(&taphead); - - clone_setup(&tapclones); - eh_tag = EVENTHANDLER_REGISTER(dev_clone, tapclone, 0, 1000); - if (eh_tag == NULL) { - clone_cleanup(&tapclones); - mtx_destroy(&tapmtx); - return (ENOMEM); - } - tap_cloner = if_clone_simple(tapname, tap_clone_create, - tap_clone_destroy, 0); - vmnet_cloner = if_clone_simple(vmnetname, vmnet_clone_create, - vmnet_clone_destroy, 0); - return (0); - - case MOD_UNLOAD: - /* - * The EBUSY algorithm here can't quite atomically - * guarantee that this is race-free since we have to - * release the tap mtx to deregister the clone handler. - */ - mtx_lock(&tapmtx); - SLIST_FOREACH(tp, &taphead, tap_next) { - mtx_lock(&tp->tap_mtx); - if (tp->tap_flags & TAP_OPEN) { - mtx_unlock(&tp->tap_mtx); - mtx_unlock(&tapmtx); - return (EBUSY); - } - mtx_unlock(&tp->tap_mtx); - } - mtx_unlock(&tapmtx); - - EVENTHANDLER_DEREGISTER(dev_clone, eh_tag); - if_clone_detach(tap_cloner); - if_clone_detach(vmnet_cloner); - drain_dev_clone_events(); - - mtx_lock(&tapmtx); - while ((tp = SLIST_FIRST(&taphead)) != NULL) { - SLIST_REMOVE_HEAD(&taphead, tap_next); - mtx_unlock(&tapmtx); - - ifp = tp->tap_ifp; - - TAPDEBUG("detaching %s\n", ifp->if_xname); - - tap_destroy(tp); - mtx_lock(&tapmtx); - } - mtx_unlock(&tapmtx); - clone_cleanup(&tapclones); - - mtx_destroy(&tapmtx); - - break; - - default: - return (EOPNOTSUPP); - } - - return (0); -} /* tapmodevent */ - - -/* - * DEVFS handler - * - * We need to support two kind of devices - tap and vmnet - */ -static void -tapclone(void *arg, struct ucred *cred, char *name, int namelen, struct cdev **dev) -{ - char devname[SPECNAMELEN + 1]; - int i, unit, append_unit; - int extra; - - if (*dev != NULL) - return; - - if (!tapdclone || - (!tapuopen && priv_check_cred(cred, PRIV_NET_IFCREATE) != 0)) - return; - - unit = 0; - append_unit = 0; - extra = 0; - - /* We're interested in only tap/vmnet devices. */ - if (strcmp(name, tapname) == 0) { - unit = -1; - } else if (strcmp(name, vmnetname) == 0) { - unit = -1; - extra = VMNET_DEV_MASK; - } else if (dev_stdclone(name, NULL, tapname, &unit) != 1) { - if (dev_stdclone(name, NULL, vmnetname, &unit) != 1) { - return; - } else { - extra = VMNET_DEV_MASK; - } - } - - if (unit == -1) - append_unit = 1; - - CURVNET_SET(CRED_TO_VNET(cred)); - /* find any existing device, or allocate new unit number */ - i = clone_create(&tapclones, &tap_cdevsw, &unit, dev, extra); - if (i) { - if (append_unit) { - /* - * We were passed 'tun' or 'tap', with no unit specified - * so we'll need to append it now. - */ - namelen = snprintf(devname, sizeof(devname), "%s%d", name, - unit); - name = devname; - } - - *dev = make_dev_credf(MAKEDEV_REF, &tap_cdevsw, unit | extra, - cred, UID_ROOT, GID_WHEEL, 0600, "%s", name); - } - - if_clone_create(name, namelen, NULL); - CURVNET_RESTORE(); -} /* tapclone */ - - -/* - * tapcreate - * - * to create interface - */ -static void -tapcreate(struct cdev *dev) -{ - struct ifnet *ifp = NULL; - struct tap_softc *tp = NULL; - unsigned short macaddr_hi; - uint32_t macaddr_mid; - int unit; - const char *name = NULL; - u_char eaddr[6]; - - /* allocate driver storage and create device */ - tp = malloc(sizeof(*tp), M_TAP, M_WAITOK | M_ZERO); - mtx_init(&tp->tap_mtx, "tap_mtx", NULL, MTX_DEF); - mtx_lock(&tapmtx); - SLIST_INSERT_HEAD(&taphead, tp, tap_next); - mtx_unlock(&tapmtx); - - unit = dev2unit(dev); - - /* select device: tap or vmnet */ - if (unit & VMNET_DEV_MASK) { - name = vmnetname; - tp->tap_flags |= TAP_VMNET; - } else - name = tapname; - - unit &= TAPMAXUNIT; - - TAPDEBUG("tapcreate(%s%d). minor = %#x\n", name, unit, dev2unit(dev)); - - /* generate fake MAC address: 00 bd xx xx xx unit_no */ - macaddr_hi = htons(0x00bd); - macaddr_mid = (uint32_t) ticks; - bcopy(&macaddr_hi, eaddr, sizeof(short)); - bcopy(&macaddr_mid, &eaddr[2], sizeof(uint32_t)); - eaddr[5] = (u_char)unit; - - /* fill the rest and attach interface */ - ifp = tp->tap_ifp = if_alloc(IFT_ETHER); - if (ifp == NULL) - panic("%s%d: can not if_alloc()", name, unit); - ifp->if_softc = tp; - if_initname(ifp, name, unit); - ifp->if_init = tapifinit; - ifp->if_start = tapifstart; - ifp->if_ioctl = tapifioctl; - ifp->if_mtu = ETHERMTU; - ifp->if_flags = (IFF_BROADCAST|IFF_SIMPLEX|IFF_MULTICAST); - IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); - ifp->if_capabilities |= IFCAP_LINKSTATE; - ifp->if_capenable |= IFCAP_LINKSTATE; - - dev->si_drv1 = tp; - tp->tap_dev = dev; - - ether_ifattach(ifp, eaddr); - - mtx_lock(&tp->tap_mtx); - tp->tap_flags |= TAP_INITED; - mtx_unlock(&tp->tap_mtx); - - knlist_init_mtx(&tp->tap_rsel.si_note, &tp->tap_mtx); - - TAPDEBUG("interface %s is created. minor = %#x\n", - ifp->if_xname, dev2unit(dev)); -} /* tapcreate */ - - -/* - * tapopen - * - * to open tunnel. must be superuser - */ -static int -tapopen(struct cdev *dev, int flag, int mode, struct thread *td) -{ - struct tap_softc *tp = NULL; - struct ifnet *ifp = NULL; - int error; - - if (tapuopen == 0) { - error = priv_check(td, PRIV_NET_TAP); - if (error) - return (error); - } - - if ((dev2unit(dev) & CLONE_UNITMASK) > TAPMAXUNIT) - return (ENXIO); - - tp = dev->si_drv1; - - mtx_lock(&tp->tap_mtx); - if (tp->tap_flags & TAP_OPEN) { - mtx_unlock(&tp->tap_mtx); - return (EBUSY); - } - - bcopy(IF_LLADDR(tp->tap_ifp), tp->ether_addr, sizeof(tp->ether_addr)); -#ifndef __rtems__ - tp->tap_pid = td->td_proc->p_pid; -#else /* __rtems__ */ - tp->tap_pid = BSD_DEFAULT_PID; -#endif /* __rtems__ */ - tp->tap_flags |= TAP_OPEN; - ifp = tp->tap_ifp; - - ifp->if_drv_flags |= IFF_DRV_RUNNING; - ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; - if (tapuponopen) - ifp->if_flags |= IFF_UP; - if_link_state_change(ifp, LINK_STATE_UP); - mtx_unlock(&tp->tap_mtx); - - TAPDEBUG("%s is open. minor = %#x\n", ifp->if_xname, dev2unit(dev)); - - return (0); -} /* tapopen */ - - -/* - * tapclose - * - * close the device - mark i/f down & delete routing info - */ -static int -tapclose(struct cdev *dev, int foo, int bar, struct thread *td) -{ - struct ifaddr *ifa; - struct tap_softc *tp = dev->si_drv1; - struct ifnet *ifp = tp->tap_ifp; - - /* junk all pending output */ - mtx_lock(&tp->tap_mtx); - CURVNET_SET(ifp->if_vnet); - IF_DRAIN(&ifp->if_snd); - - /* - * Do not bring the interface down, and do not anything with - * interface, if we are in VMnet mode. Just close the device. - */ - if (((tp->tap_flags & TAP_VMNET) == 0) && - (ifp->if_flags & (IFF_UP | IFF_LINK0)) == IFF_UP) { - mtx_unlock(&tp->tap_mtx); - if_down(ifp); - mtx_lock(&tp->tap_mtx); - if (ifp->if_drv_flags & IFF_DRV_RUNNING) { - ifp->if_drv_flags &= ~IFF_DRV_RUNNING; - mtx_unlock(&tp->tap_mtx); - CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { - rtinit(ifa, (int)RTM_DELETE, 0); - } - if_purgeaddrs(ifp); - mtx_lock(&tp->tap_mtx); - } - } - - if_link_state_change(ifp, LINK_STATE_DOWN); - CURVNET_RESTORE(); - - funsetown(&tp->tap_sigio); - selwakeuppri(&tp->tap_rsel, PZERO+1); - KNOTE_LOCKED(&tp->tap_rsel.si_note, 0); - - tp->tap_flags &= ~TAP_OPEN; - tp->tap_pid = 0; - mtx_unlock(&tp->tap_mtx); - - TAPDEBUG("%s is closed. minor = %#x\n", - ifp->if_xname, dev2unit(dev)); - - return (0); -} /* tapclose */ - - -/* - * tapifinit - * - * network interface initialization function - */ -static void -tapifinit(void *xtp) -{ - struct tap_softc *tp = (struct tap_softc *)xtp; - struct ifnet *ifp = tp->tap_ifp; - - TAPDEBUG("initializing %s\n", ifp->if_xname); - - mtx_lock(&tp->tap_mtx); - ifp->if_drv_flags |= IFF_DRV_RUNNING; - ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; - mtx_unlock(&tp->tap_mtx); - - /* attempt to start output */ - tapifstart(ifp); -} /* tapifinit */ - - -/* - * tapifioctl - * - * Process an ioctl request on network interface - */ -static int -tapifioctl(struct ifnet *ifp, u_long cmd, caddr_t data) -{ - struct tap_softc *tp = ifp->if_softc; - struct ifreq *ifr = (struct ifreq *)data; - struct ifstat *ifs = NULL; - struct ifmediareq *ifmr = NULL; - int dummy, error = 0; - - switch (cmd) { - case SIOCSIFFLAGS: /* XXX -- just like vmnet does */ - case SIOCADDMULTI: - case SIOCDELMULTI: - break; - - case SIOCGIFMEDIA: - ifmr = (struct ifmediareq *)data; - dummy = ifmr->ifm_count; - ifmr->ifm_count = 1; - ifmr->ifm_status = IFM_AVALID; - ifmr->ifm_active = IFM_ETHER; - if (tp->tap_flags & TAP_OPEN) - ifmr->ifm_status |= IFM_ACTIVE; - ifmr->ifm_current = ifmr->ifm_active; - if (dummy >= 1) { - int media = IFM_ETHER; - error = copyout(&media, ifmr->ifm_ulist, - sizeof(int)); - } - break; - - case SIOCSIFMTU: - ifp->if_mtu = ifr->ifr_mtu; - break; - - case SIOCGIFSTATUS: - ifs = (struct ifstat *)data; - mtx_lock(&tp->tap_mtx); - if (tp->tap_pid != 0) - snprintf(ifs->ascii, sizeof(ifs->ascii), - "\tOpened by PID %d\n", tp->tap_pid); - else - ifs->ascii[0] = '\0'; - mtx_unlock(&tp->tap_mtx); - break; - - default: - error = ether_ioctl(ifp, cmd, data); - break; - } - - return (error); -} /* tapifioctl */ - - -/* - * tapifstart - * - * queue packets from higher level ready to put out - */ -static void -tapifstart(struct ifnet *ifp) -{ - struct tap_softc *tp = ifp->if_softc; - - TAPDEBUG("%s starting\n", ifp->if_xname); - - /* - * do not junk pending output if we are in VMnet mode. - * XXX: can this do any harm because of queue overflow? - */ - - mtx_lock(&tp->tap_mtx); - if (((tp->tap_flags & TAP_VMNET) == 0) && - ((tp->tap_flags & TAP_READY) != TAP_READY)) { - struct mbuf *m; - - /* Unlocked read. */ - TAPDEBUG("%s not ready, tap_flags = 0x%x\n", ifp->if_xname, - tp->tap_flags); - - for (;;) { - IF_DEQUEUE(&ifp->if_snd, m); - if (m != NULL) { - m_freem(m); - if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); - } else - break; - } - mtx_unlock(&tp->tap_mtx); - - return; - } - - ifp->if_drv_flags |= IFF_DRV_OACTIVE; - - if (!IFQ_IS_EMPTY(&ifp->if_snd)) { - if (tp->tap_flags & TAP_RWAIT) { - tp->tap_flags &= ~TAP_RWAIT; - wakeup(tp); - } - - if ((tp->tap_flags & TAP_ASYNC) && (tp->tap_sigio != NULL)) { - mtx_unlock(&tp->tap_mtx); - pgsigio(&tp->tap_sigio, SIGIO, 0); - mtx_lock(&tp->tap_mtx); - } - - selwakeuppri(&tp->tap_rsel, PZERO+1); - KNOTE_LOCKED(&tp->tap_rsel.si_note, 0); - if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); /* obytes are counted in ether_output */ - } - - ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; - mtx_unlock(&tp->tap_mtx); -} /* tapifstart */ - - -/* - * tapioctl - * - * the cdevsw interface is now pretty minimal - */ -static int -tapioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) -{ - struct ifreq ifr; - struct tap_softc *tp = dev->si_drv1; - struct ifnet *ifp = tp->tap_ifp; - struct tapinfo *tapp = NULL; - int f; - int error; -#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \ - defined(COMPAT_FREEBSD4) - int ival; -#endif - - switch (cmd) { - case TAPSIFINFO: - tapp = (struct tapinfo *)data; - if (ifp->if_type != tapp->type) - return (EPROTOTYPE); - mtx_lock(&tp->tap_mtx); - if (ifp->if_mtu != tapp->mtu) { - strlcpy(ifr.ifr_name, if_name(ifp), IFNAMSIZ); - ifr.ifr_mtu = tapp->mtu; - CURVNET_SET(ifp->if_vnet); - error = ifhwioctl(SIOCSIFMTU, ifp, - (caddr_t)&ifr, td); - CURVNET_RESTORE(); - if (error) { - mtx_unlock(&tp->tap_mtx); - return (error); - } - } - ifp->if_baudrate = tapp->baudrate; - mtx_unlock(&tp->tap_mtx); - break; - - case TAPGIFINFO: - tapp = (struct tapinfo *)data; - mtx_lock(&tp->tap_mtx); - tapp->mtu = ifp->if_mtu; - tapp->type = ifp->if_type; - tapp->baudrate = ifp->if_baudrate; - mtx_unlock(&tp->tap_mtx); - break; - - case TAPSDEBUG: - tapdebug = *(int *)data; - break; - - case TAPGDEBUG: - *(int *)data = tapdebug; - break; - - case TAPGIFNAME: { - struct ifreq *ifr = (struct ifreq *) data; - - strlcpy(ifr->ifr_name, ifp->if_xname, IFNAMSIZ); - } break; - - case FIONBIO: - break; - - case FIOASYNC: - mtx_lock(&tp->tap_mtx); - if (*(int *)data) - tp->tap_flags |= TAP_ASYNC; - else - tp->tap_flags &= ~TAP_ASYNC; - mtx_unlock(&tp->tap_mtx); - break; - - case FIONREAD: - if (!IFQ_IS_EMPTY(&ifp->if_snd)) { - struct mbuf *mb; - - IFQ_LOCK(&ifp->if_snd); - IFQ_POLL_NOLOCK(&ifp->if_snd, mb); - for (*(int *)data = 0; mb != NULL; - mb = mb->m_next) - *(int *)data += mb->m_len; - IFQ_UNLOCK(&ifp->if_snd); - } else - *(int *)data = 0; - break; - - case FIOSETOWN: - return (fsetown(*(int *)data, &tp->tap_sigio)); - - case FIOGETOWN: - *(int *)data = fgetown(&tp->tap_sigio); - return (0); - - /* this is deprecated, FIOSETOWN should be used instead */ - case TIOCSPGRP: - return (fsetown(-(*(int *)data), &tp->tap_sigio)); - - /* this is deprecated, FIOGETOWN should be used instead */ - case TIOCGPGRP: - *(int *)data = -fgetown(&tp->tap_sigio); - return (0); - - /* VMware/VMnet port ioctl's */ - -#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \ - defined(COMPAT_FREEBSD4) - case _IO('V', 0): - ival = IOCPARM_IVAL(data); - data = (caddr_t)&ival; - /* FALLTHROUGH */ -#endif - case VMIO_SIOCSIFFLAGS: /* VMware/VMnet SIOCSIFFLAGS */ - f = *(int *)data; - f &= 0x0fff; - f &= ~IFF_CANTCHANGE; - f |= IFF_UP; - - mtx_lock(&tp->tap_mtx); - ifp->if_flags = f | (ifp->if_flags & IFF_CANTCHANGE); - mtx_unlock(&tp->tap_mtx); - break; - - case SIOCGIFADDR: /* get MAC address of the remote side */ - mtx_lock(&tp->tap_mtx); - bcopy(tp->ether_addr, data, sizeof(tp->ether_addr)); - mtx_unlock(&tp->tap_mtx); - break; - - case SIOCSIFADDR: /* set MAC address of the remote side */ - mtx_lock(&tp->tap_mtx); - bcopy(data, tp->ether_addr, sizeof(tp->ether_addr)); - mtx_unlock(&tp->tap_mtx); - break; - - default: - return (ENOTTY); - } - return (0); -} /* tapioctl */ - - -/* - * tapread - * - * the cdevsw read interface - reads a packet at a time, or at - * least as much of a packet as can be read - */ -static int -tapread(struct cdev *dev, struct uio *uio, int flag) -{ - struct tap_softc *tp = dev->si_drv1; - struct ifnet *ifp = tp->tap_ifp; - struct mbuf *m = NULL; - int error = 0, len; - - TAPDEBUG("%s reading, minor = %#x\n", ifp->if_xname, dev2unit(dev)); - - mtx_lock(&tp->tap_mtx); - if ((tp->tap_flags & TAP_READY) != TAP_READY) { - mtx_unlock(&tp->tap_mtx); - - /* Unlocked read. */ - TAPDEBUG("%s not ready. minor = %#x, tap_flags = 0x%x\n", - ifp->if_xname, dev2unit(dev), tp->tap_flags); - - return (EHOSTDOWN); - } - - tp->tap_flags &= ~TAP_RWAIT; - - /* sleep until we get a packet */ - do { - IF_DEQUEUE(&ifp->if_snd, m); - - if (m == NULL) { - if (flag & O_NONBLOCK) { - mtx_unlock(&tp->tap_mtx); - return (EWOULDBLOCK); - } - - tp->tap_flags |= TAP_RWAIT; - error = mtx_sleep(tp, &tp->tap_mtx, PCATCH | (PZERO + 1), - "taprd", 0); - if (error) { - mtx_unlock(&tp->tap_mtx); - return (error); - } - } - } while (m == NULL); - mtx_unlock(&tp->tap_mtx); - - /* feed packet to bpf */ - BPF_MTAP(ifp, m); - - /* xfer packet to user space */ - while ((m != NULL) && (uio->uio_resid > 0) && (error == 0)) { - len = min(uio->uio_resid, m->m_len); - if (len == 0) - break; - - error = uiomove(mtod(m, void *), len, uio); - m = m_free(m); - } - - if (m != NULL) { - TAPDEBUG("%s dropping mbuf, minor = %#x\n", ifp->if_xname, - dev2unit(dev)); - m_freem(m); - } - - return (error); -} /* tapread */ - - -/* - * tapwrite - * - * the cdevsw write interface - an atomic write is a packet - or else! - */ -static int -tapwrite(struct cdev *dev, struct uio *uio, int flag) -{ - struct ether_header *eh; - struct tap_softc *tp = dev->si_drv1; - struct ifnet *ifp = tp->tap_ifp; - struct mbuf *m; - - TAPDEBUG("%s writing, minor = %#x\n", - ifp->if_xname, dev2unit(dev)); - - if (uio->uio_resid == 0) - return (0); - - if ((uio->uio_resid < 0) || (uio->uio_resid > TAPMRU)) { - TAPDEBUG("%s invalid packet len = %zd, minor = %#x\n", - ifp->if_xname, uio->uio_resid, dev2unit(dev)); - - return (EIO); - } - - if ((m = m_uiotombuf(uio, M_NOWAIT, 0, ETHER_ALIGN, - M_PKTHDR)) == NULL) { - if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); - return (ENOBUFS); - } - - m->m_pkthdr.rcvif = ifp; - - /* - * Only pass a unicast frame to ether_input(), if it would actually - * have been received by non-virtual hardware. - */ - if (m->m_len < sizeof(struct ether_header)) { - m_freem(m); - return (0); - } - eh = mtod(m, struct ether_header *); - - if (eh && (ifp->if_flags & IFF_PROMISC) == 0 && - !ETHER_IS_MULTICAST(eh->ether_dhost) && - bcmp(eh->ether_dhost, IF_LLADDR(ifp), ETHER_ADDR_LEN) != 0) { - m_freem(m); - return (0); - } - - /* Pass packet up to parent. */ - CURVNET_SET(ifp->if_vnet); - (*ifp->if_input)(ifp, m); - CURVNET_RESTORE(); - if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1); /* ibytes are counted in parent */ - - return (0); -} /* tapwrite */ - - -/* - * tappoll - * - * the poll interface, this is only useful on reads - * really. the write detect always returns true, write never blocks - * anyway, it either accepts the packet or drops it - */ -static int -tappoll(struct cdev *dev, int events, struct thread *td) -{ - struct tap_softc *tp = dev->si_drv1; - struct ifnet *ifp = tp->tap_ifp; - int revents = 0; - - TAPDEBUG("%s polling, minor = %#x\n", - ifp->if_xname, dev2unit(dev)); - - if (events & (POLLIN | POLLRDNORM)) { - IFQ_LOCK(&ifp->if_snd); - if (!IFQ_IS_EMPTY(&ifp->if_snd)) { - TAPDEBUG("%s have data in queue. len = %d, " \ - "minor = %#x\n", ifp->if_xname, - ifp->if_snd.ifq_len, dev2unit(dev)); - - revents |= (events & (POLLIN | POLLRDNORM)); - } else { - TAPDEBUG("%s waiting for data, minor = %#x\n", - ifp->if_xname, dev2unit(dev)); - - selrecord(td, &tp->tap_rsel); - } - IFQ_UNLOCK(&ifp->if_snd); - } - - if (events & (POLLOUT | POLLWRNORM)) - revents |= (events & (POLLOUT | POLLWRNORM)); - - return (revents); -} /* tappoll */ - - -/* - * tap_kqfilter - * - * support for kevent() system call - */ -static int -tapkqfilter(struct cdev *dev, struct knote *kn) -{ - struct tap_softc *tp = dev->si_drv1; - struct ifnet *ifp = tp->tap_ifp; - - switch (kn->kn_filter) { - case EVFILT_READ: - TAPDEBUG("%s kqfilter: EVFILT_READ, minor = %#x\n", - ifp->if_xname, dev2unit(dev)); - kn->kn_fop = &tap_read_filterops; - break; - - case EVFILT_WRITE: - TAPDEBUG("%s kqfilter: EVFILT_WRITE, minor = %#x\n", - ifp->if_xname, dev2unit(dev)); - kn->kn_fop = &tap_write_filterops; - break; - - default: - TAPDEBUG("%s kqfilter: invalid filter, minor = %#x\n", - ifp->if_xname, dev2unit(dev)); - return (EINVAL); - /* NOT REACHED */ - } - - kn->kn_hook = tp; - knlist_add(&tp->tap_rsel.si_note, kn, 0); - - return (0); -} /* tapkqfilter */ - - -/* - * tap_kqread - * - * Return true if there is data in the interface queue - */ -static int -tapkqread(struct knote *kn, long hint) -{ - int ret; - struct tap_softc *tp = kn->kn_hook; - struct cdev *dev = tp->tap_dev; - struct ifnet *ifp = tp->tap_ifp; - - if ((kn->kn_data = ifp->if_snd.ifq_len) > 0) { - TAPDEBUG("%s have data in queue. len = %d, minor = %#x\n", - ifp->if_xname, ifp->if_snd.ifq_len, dev2unit(dev)); - ret = 1; - } else { - TAPDEBUG("%s waiting for data, minor = %#x\n", - ifp->if_xname, dev2unit(dev)); - ret = 0; - } - - return (ret); -} /* tapkqread */ - - -/* - * tap_kqwrite - * - * Always can write. Return the MTU in kn->data - */ -static int -tapkqwrite(struct knote *kn, long hint) -{ - struct tap_softc *tp = kn->kn_hook; - struct ifnet *ifp = tp->tap_ifp; - - kn->kn_data = ifp->if_mtu; - - return (1); -} /* tapkqwrite */ - - -static void -tapkqdetach(struct knote *kn) -{ - struct tap_softc *tp = kn->kn_hook; - - knlist_remove(&tp->tap_rsel.si_note, kn, 0); -} /* tapkqdetach */ - |