/* $Id: VBoxNetAdp-darwin.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */ /** @file * VBoxNetAdp - Virtual Network Adapter Driver (Host), Darwin Specific Code. */ /* * Copyright (C) 2008-2020 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * The contents of this file may alternatively be used under the terms * of the Common Development and Distribution License Version 1.0 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the * VirtualBox OSE distribution, in which case the provisions of the * CDDL are applicable instead of those of the GPL. * * You may elect to license modified versions of this file under the * terms and conditions of either the GPL or the CDDL or both. */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #define LOG_GROUP LOG_GROUP_NET_ADP_DRV #include "../../../Runtime/r0drv/darwin/the-darwin-kernel.h" #include #include #include #include #include #include #include #include #include #include #include "../../darwin/VBoxNetSend.h" #include RT_C_DECLS_BEGIN /* Buggy 10.4 headers, fixed in 10.5. */ #include RT_C_DECLS_END #include #include #include #include #include #include #include #include #include #include RT_C_DECLS_BEGIN #include RT_C_DECLS_END #define VBOXNETADP_OS_SPECFIC 1 #include "../VBoxNetAdpInternal.h" /********************************************************************************************************************************* * Defined Constants And Macros * *********************************************************************************************************************************/ /** The maximum number of SG segments. * Used to prevent stack overflow and similar bad stuff. */ #define VBOXNETADP_DARWIN_MAX_SEGS 32 #define VBOXNETADP_DARWIN_MAX_FAMILIES 4 #define VBOXNETADP_DARWIN_NAME "vboxnet" #define VBOXNETADP_DARWIN_MTU 1500 #define VBOXNETADP_DARWIN_DETACH_TIMEOUT 500 #define VBOXNETADP_FROM_IFACE(iface) ((PVBOXNETADP) ifnet_softc(iface)) /********************************************************************************************************************************* * Internal Functions * *********************************************************************************************************************************/ RT_C_DECLS_BEGIN static kern_return_t VBoxNetAdpDarwinStart(struct kmod_info *pKModInfo, void *pvData); static kern_return_t VBoxNetAdpDarwinStop(struct kmod_info *pKModInfo, void *pvData); RT_C_DECLS_END static int VBoxNetAdpDarwinOpen(dev_t Dev, int fFlags, int fDevType, struct proc *pProcess); static int VBoxNetAdpDarwinClose(dev_t Dev, int fFlags, int fDevType, struct proc *pProcess); static int VBoxNetAdpDarwinIOCtl(dev_t Dev, u_long iCmd, caddr_t pData, int fFlags, struct proc *pProcess); /********************************************************************************************************************************* * Global Variables * *********************************************************************************************************************************/ /** * Declare the module stuff. */ RT_C_DECLS_BEGIN extern kern_return_t _start(struct kmod_info *pKModInfo, void *pvData); extern kern_return_t _stop(struct kmod_info *pKModInfo, void *pvData); KMOD_EXPLICIT_DECL(VBoxNetAdp, VBOX_VERSION_STRING, _start, _stop) DECLHIDDEN(kmod_start_func_t *) _realmain = VBoxNetAdpDarwinStart; DECLHIDDEN(kmod_stop_func_t *) _antimain = VBoxNetAdpDarwinStop; DECLHIDDEN(int) _kext_apple_cc = __APPLE_CC__; RT_C_DECLS_END /** * The (common) global data. */ static int g_nCtlDev = -1; /* Major dev number */ static void *g_hCtlDev = 0; /* FS dev handle */ /** * The character device switch table for the driver. */ static struct cdevsw g_ChDev = { /*.d_open = */VBoxNetAdpDarwinOpen, /*.d_close = */VBoxNetAdpDarwinClose, /*.d_read = */eno_rdwrt, /*.d_write = */eno_rdwrt, /*.d_ioctl = */VBoxNetAdpDarwinIOCtl, /*.d_stop = */eno_stop, /*.d_reset = */eno_reset, /*.d_ttys = */NULL, /*.d_select = */eno_select, /*.d_mmap = */eno_mmap, /*.d_strategy = */eno_strat, /*.d_getc = */(void *)(uintptr_t)&enodev, //eno_getc, /*.d_putc = */(void *)(uintptr_t)&enodev, //eno_putc, /*.d_type = */0 }; static void vboxNetAdpDarwinComposeUUID(PVBOXNETADP pThis, PRTUUID pUuid) { /* Generate UUID from name and MAC address. */ RTUuidClear(pUuid); memcpy(pUuid->au8, "vboxnet", 7); pUuid->Gen.u8ClockSeqHiAndReserved = (pUuid->Gen.u8ClockSeqHiAndReserved & 0x3f) | 0x80; pUuid->Gen.u16TimeHiAndVersion = (pUuid->Gen.u16TimeHiAndVersion & 0x0fff) | 0x4000; pUuid->Gen.u8ClockSeqLow = pThis->iUnit; vboxNetAdpComposeMACAddress(pThis, (PRTMAC)pUuid->Gen.au8Node); } static errno_t vboxNetAdpDarwinOutput(ifnet_t pIface, mbuf_t pMBuf) { /* * We are a dummy interface with all the real work done in * VBoxNetFlt bridged networking filter. If anything makes it * this far, it must be a broadcast or a packet for an unknown * guest that intnet didn't know where to dispatch. In that case * we must still do the BPF tap and stats. */ bpf_tap_out(pIface, DLT_EN10MB, pMBuf, NULL, 0); ifnet_stat_increment_out(pIface, 1, mbuf_len(pMBuf), 0); mbuf_freem_list(pMBuf); return 0; } static void vboxNetAdpDarwinDetach(ifnet_t pIface) { PVBOXNETADP pThis = VBOXNETADP_FROM_IFACE(pIface); Assert(pThis); Log2(("vboxNetAdpDarwinDetach: Signaling detach to vboxNetAdpUnregisterDevice.\n")); /* Let vboxNetAdpDarwinUnregisterDevice know that the interface has been detached. */ RTSemEventSignal(pThis->u.s.hEvtDetached); } static errno_t vboxNetAdpDarwinDemux(ifnet_t pIface, mbuf_t pMBuf, char *pFrameHeader, protocol_family_t *pProtocolFamily) { /* * Anything we get here comes from VBoxNetFlt bridged networking * filter where it has already been accounted for and fed to bpf. */ return ether_demux(pIface, pMBuf, pFrameHeader, pProtocolFamily); } static errno_t vboxNetAdpDarwinIfIOCtl(ifnet_t pIface, unsigned long uCmd, void *pvData) { errno_t error = 0; if (pvData == NULL) { /* * Common pattern in the kernel code is to make changes in the * net layer and then notify the device driver by calling its * ioctl function with NULL parameter, e.g.: * * ifnet_set_flags(interface, ...); * ifnet_ioctl(interface, 0, SIOCSIFFLAGS, NULL); * * These are no-ops for us, so tell the caller we succeeded * because some callers do check that return value. */ switch (uCmd) { case SIOCSIFFLAGS: Log2(("VBoxNetAdp: %s%d: SIOCSIFFLAGS (null): flags = 0x%04hx\n", ifnet_name(pIface), ifnet_unit(pIface), (uint16_t)ifnet_flags(pIface))); return 0; case SIOCADDMULTI: case SIOCDELMULTI: Log2(("VBoxNetAdp: %s%d: SIOC%sMULTI (null)\n", ifnet_name(pIface), ifnet_unit(pIface), uCmd == SIOCADDMULTI ? "ADD" : "DEL")); return 0; } } Log2(("VBoxNetAdp: %s%d: %c%c '%c' %u len %u\n", ifnet_name(pIface), ifnet_unit(pIface), uCmd & IOC_OUT ? '<' : '-', uCmd & IOC_IN ? '>' : '-', IOCGROUP(uCmd), uCmd & 0xff, IOCPARM_LEN(uCmd))); error = ether_ioctl(pIface, uCmd, pvData); return error; } int vboxNetAdpOsCreate(PVBOXNETADP pThis, PCRTMAC pMACAddress) { int rc; struct ifnet_init_params Params; RTUUID uuid; struct sockaddr_dl mac; pThis->u.s.hEvtDetached = NIL_RTSEMEVENT; rc = RTSemEventCreate(&pThis->u.s.hEvtDetached); if (RT_FAILURE(rc)) { printf("vboxNetAdpOsCreate: failed to create semaphore (rc=%d).\n", rc); return rc; } mac.sdl_len = sizeof(mac); mac.sdl_family = AF_LINK; mac.sdl_alen = ETHER_ADDR_LEN; mac.sdl_nlen = 0; mac.sdl_slen = 0; memcpy(LLADDR(&mac), pMACAddress->au8, mac.sdl_alen); RTStrPrintf(pThis->szName, VBOXNETADP_MAX_NAME_LEN, "%s%d", VBOXNETADP_NAME, pThis->iUnit); vboxNetAdpDarwinComposeUUID(pThis, &uuid); Params.uniqueid = uuid.au8; Params.uniqueid_len = sizeof(uuid); Params.name = VBOXNETADP_NAME; Params.unit = pThis->iUnit; Params.family = IFNET_FAMILY_ETHERNET; Params.type = IFT_ETHER; Params.output = vboxNetAdpDarwinOutput; Params.demux = vboxNetAdpDarwinDemux; Params.add_proto = ether_add_proto; Params.del_proto = ether_del_proto; Params.check_multi = ether_check_multi; Params.framer = ether_frameout; Params.softc = pThis; Params.ioctl = vboxNetAdpDarwinIfIOCtl; Params.set_bpf_tap = NULL; Params.detach = vboxNetAdpDarwinDetach; Params.event = NULL; Params.broadcast_addr = "\xFF\xFF\xFF\xFF\xFF\xFF"; Params.broadcast_len = ETHER_ADDR_LEN; errno_t err = ifnet_allocate(&Params, &pThis->u.s.pIface); if (!err) { err = ifnet_attach(pThis->u.s.pIface, &mac); if (!err) { bpfattach(pThis->u.s.pIface, DLT_EN10MB, ETHER_HDR_LEN); err = ifnet_set_flags(pThis->u.s.pIface, IFF_RUNNING | IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST, 0xFFFF); if (!err) { ifnet_set_mtu(pThis->u.s.pIface, VBOXNETADP_MTU); VBoxNetSendDummy(pThis->u.s.pIface); return VINF_SUCCESS; } else Log(("vboxNetAdpDarwinRegisterDevice: Failed to set flags (err=%d).\n", err)); ifnet_detach(pThis->u.s.pIface); } else Log(("vboxNetAdpDarwinRegisterDevice: Failed to attach to interface (err=%d).\n", err)); ifnet_release(pThis->u.s.pIface); } else Log(("vboxNetAdpDarwinRegisterDevice: Failed to allocate interface (err=%d).\n", err)); RTSemEventDestroy(pThis->u.s.hEvtDetached); pThis->u.s.hEvtDetached = NIL_RTSEMEVENT; return RTErrConvertFromErrno(err); } void vboxNetAdpOsDestroy(PVBOXNETADP pThis) { /* Bring down the interface */ int rc = VINF_SUCCESS; errno_t err; AssertPtr(pThis->u.s.pIface); Assert(pThis->u.s.hEvtDetached != NIL_RTSEMEVENT); err = ifnet_set_flags(pThis->u.s.pIface, 0, IFF_UP | IFF_RUNNING); if (err) Log(("vboxNetAdpDarwinUnregisterDevice: Failed to bring down interface " "(err=%d).\n", err)); err = ifnet_detach(pThis->u.s.pIface); if (err) Log(("vboxNetAdpDarwinUnregisterDevice: Failed to detach interface " "(err=%d).\n", err)); Log2(("vboxNetAdpDarwinUnregisterDevice: Waiting for 'detached' event...\n")); /* Wait until we get a signal from detach callback. */ rc = RTSemEventWait(pThis->u.s.hEvtDetached, VBOXNETADP_DETACH_TIMEOUT); if (rc == VERR_TIMEOUT) LogRel(("VBoxAdpDrv: Failed to detach interface %s%d\n.", VBOXNETADP_NAME, pThis->iUnit)); err = ifnet_release(pThis->u.s.pIface); if (err) Log(("vboxNetAdpUnregisterDevice: Failed to release interface (err=%d).\n", err)); RTSemEventDestroy(pThis->u.s.hEvtDetached); pThis->u.s.hEvtDetached = NIL_RTSEMEVENT; } /** * Device open. Called on open /dev/vboxnetctl * * @param Dev The device number. * @param fFlags ???. * @param fDevType ???. * @param pProcess The process issuing this request. */ static int VBoxNetAdpDarwinOpen(dev_t Dev, int fFlags, int fDevType, struct proc *pProcess) { RT_NOREF(Dev, fFlags, fDevType, pProcess); #ifdef LOG_ENABLED char szName[128]; szName[0] = '\0'; proc_name(proc_pid(pProcess), szName, sizeof(szName)); Log(("VBoxNetAdpDarwinOpen: pid=%d '%s'\n", proc_pid(pProcess), szName)); #endif return 0; } /** * Close device. */ static int VBoxNetAdpDarwinClose(dev_t Dev, int fFlags, int fDevType, struct proc *pProcess) { RT_NOREF(Dev, fFlags, fDevType, pProcess); Log(("VBoxNetAdpDarwinClose: pid=%d\n", proc_pid(pProcess))); return 0; } /** * Device I/O Control entry point. * * @returns Darwin for slow IOCtls and VBox status code for the fast ones. * @param Dev The device number (major+minor). * @param iCmd The IOCtl command. * @param pData Pointer to the data (if any it's a SUPDRVIOCTLDATA (kernel copy)). * @param fFlags Flag saying we're a character device (like we didn't know already). * @param pProcess The process issuing this request. */ static int VBoxNetAdpDarwinIOCtl(dev_t Dev, u_long iCmd, caddr_t pData, int fFlags, struct proc *pProcess) { RT_NOREF(Dev, fFlags, pProcess); uint32_t cbReq = IOCPARM_LEN(iCmd); PVBOXNETADPREQ pReq = (PVBOXNETADPREQ)pData; int rc; Log(("VBoxNetAdpDarwinIOCtl: param len %#x; iCmd=%#lx\n", cbReq, iCmd)); switch (IOCBASECMD(iCmd)) { case IOCBASECMD(VBOXNETADP_CTL_ADD): { if ( (IOC_DIRMASK & iCmd) != IOC_INOUT || cbReq < sizeof(VBOXNETADPREQ)) return EINVAL; PVBOXNETADP pNew; Log(("VBoxNetAdpDarwinIOCtl: szName=%s\n", pReq->szName)); rc = vboxNetAdpCreate(&pNew, pReq->szName[0] && RTStrEnd(pReq->szName, RT_MIN(cbReq, sizeof(pReq->szName))) ? pReq->szName : NULL); if (RT_FAILURE(rc)) return rc == VERR_OUT_OF_RESOURCES ? ENOMEM : EINVAL; Assert(strlen(pReq->szName) < sizeof(pReq->szName)); strncpy(pReq->szName, pNew->szName, sizeof(pReq->szName) - 1); pReq->szName[sizeof(pReq->szName) - 1] = '\0'; Log(("VBoxNetAdpDarwinIOCtl: Added '%s'\n", pReq->szName)); break; } case IOCBASECMD(VBOXNETADP_CTL_REMOVE): { if (!RTStrEnd(pReq->szName, RT_MIN(cbReq, sizeof(pReq->szName)))) return EINVAL; PVBOXNETADP pAdp = vboxNetAdpFindByName(pReq->szName); if (!pAdp) return EINVAL; rc = vboxNetAdpDestroy(pAdp); if (RT_FAILURE(rc)) return EINVAL; Log(("VBoxNetAdpDarwinIOCtl: Removed %s\n", pReq->szName)); break; } default: printf("VBoxNetAdpDarwinIOCtl: unknown command %lx.\n", IOCBASECMD(iCmd)); return EINVAL; } return 0; } int vboxNetAdpOsInit(PVBOXNETADP pThis) { /* * Init the darwin specific members. */ pThis->u.s.pIface = NULL; pThis->u.s.hEvtDetached = NIL_RTSEMEVENT; return VINF_SUCCESS; } /** * Start the kernel module. */ static kern_return_t VBoxNetAdpDarwinStart(struct kmod_info *pKModInfo, void *pvData) { RT_NOREF(pKModInfo, pvData); int rc; /* * Initialize IPRT and find our module tag id. * (IPRT is shared with VBoxDrv, it creates the loggers.) */ rc = RTR0Init(0); if (RT_SUCCESS(rc)) { Log(("VBoxNetAdpDarwinStart\n")); rc = vboxNetAdpInit(); if (RT_SUCCESS(rc)) { g_nCtlDev = cdevsw_add(-1, &g_ChDev); if (g_nCtlDev < 0) { LogRel(("VBoxAdp: failed to register control device.")); rc = VERR_CANT_CREATE; } else { g_hCtlDev = devfs_make_node(makedev(g_nCtlDev, 0), DEVFS_CHAR, UID_ROOT, GID_WHEEL, 0600, VBOXNETADP_CTL_DEV_NAME); if (!g_hCtlDev) { LogRel(("VBoxAdp: failed to create FS node for control device.")); rc = VERR_CANT_CREATE; } } } if (RT_SUCCESS(rc)) { LogRel(("VBoxAdpDrv: version " VBOX_VERSION_STRING " r%d\n", VBOX_SVN_REV)); return KMOD_RETURN_SUCCESS; } LogRel(("VBoxAdpDrv: failed to initialize device extension (rc=%d)\n", rc)); RTR0Term(); } else printf("VBoxAdpDrv: failed to initialize IPRT (rc=%d)\n", rc); return KMOD_RETURN_FAILURE; } /** * Stop the kernel module. */ static kern_return_t VBoxNetAdpDarwinStop(struct kmod_info *pKModInfo, void *pvData) { RT_NOREF(pKModInfo, pvData); Log(("VBoxNetAdpDarwinStop\n")); vboxNetAdpShutdown(); /* Remove control device */ devfs_remove(g_hCtlDev); cdevsw_remove(g_nCtlDev, &g_ChDev); RTR0Term(); return KMOD_RETURN_SUCCESS; }