/* $OpenBSD: if_cdce.c,v 1.11 2005/09/29 01:18:05 deraadt Exp $ */ /* * Copyright (c) 1997, 1998, 1999, 2000-2003 Bill Paul * Copyright (c) 2003 Craig Boston * Copyright (c) 2004 Daniel Hartmeier * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Bill Paul. * 4. Neither the name of the author nor the names of any co-contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul, THE VOICES IN HIS HEAD OR * THE 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. */ /* * USB Communication Device Class (Ethernet Networking Control Model) * http://www.usb.org/developers/devclass_docs/usbcdc11.pdf * */ #include #include #include #include #include #include #include #include #include #include #include #include #if NBPFILTER > 0 #include #define BPF_MTAP(ifp, m) bpf_mtap((ifp)->if_bpf, (m)) #endif #include #include #include #include #include #include #include #include #include #include #include Static void *cdce_get_desc(usbd_device_handle dev, int type, int subtype); Static int cdce_tx_list_init(struct cdce_softc *); Static int cdce_rx_list_init(struct cdce_softc *); Static int cdce_newbuf(struct cdce_softc *, struct cdce_chain *, struct mbuf *); Static int cdce_encap(struct cdce_softc *, struct mbuf *, int); Static void cdce_rxeof(usbd_xfer_handle, usbd_private_handle, usbd_status); Static void cdce_txeof(usbd_xfer_handle, usbd_private_handle, usbd_status); Static void cdce_start(struct ifnet *); Static int cdce_ioctl(struct ifnet *, u_long, caddr_t); Static void cdce_init(void *); Static void cdce_watchdog(struct ifnet *); Static void cdce_stop(struct cdce_softc *); static uint32_t cdce_crc32(const void *, size_t); Static const struct cdce_type cdce_devs[] = { {{ USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2501 }, CDCE_NO_UNION }, {{ USB_VENDOR_SHARP, USB_PRODUCT_SHARP_SL5500 }, CDCE_ZAURUS }, {{ USB_VENDOR_SHARP, USB_PRODUCT_SHARP_A300 }, CDCE_ZAURUS | CDCE_NO_UNION }, {{ USB_VENDOR_SHARP, USB_PRODUCT_SHARP_SL5600 }, CDCE_ZAURUS | CDCE_NO_UNION }, {{ USB_VENDOR_SHARP, USB_PRODUCT_SHARP_C700 }, CDCE_ZAURUS | CDCE_NO_UNION }, {{ USB_VENDOR_SHARP, USB_PRODUCT_SHARP_C750 }, CDCE_ZAURUS | CDCE_NO_UNION }, {{ USB_VENDOR_GMATE, USB_PRODUCT_GMATE_YP3X00 }, CDCE_NO_UNION }, {{ USB_VENDOR_NETCHIP, USB_PRODUCT_NETCHIP_ETHERNETGADGET }, CDCE_NO_UNION }, }; #define cdce_lookup(v, p) ((const struct cdce_type *)usb_lookup(cdce_devs, v, p)) USB_DECLARE_DRIVER_CLASS(cdce, DV_IFNET); USB_MATCH(cdce) { USB_MATCH_START(cdce, uaa); usb_interface_descriptor_t *id; if (uaa->iface == NULL) return (UMATCH_NONE); id = usbd_get_interface_descriptor(uaa->iface); if (id == NULL) return (UMATCH_NONE); if (cdce_lookup(uaa->vendor, uaa->product) != NULL) return (UMATCH_VENDOR_PRODUCT); if (id->bInterfaceClass == UICLASS_CDC && id->bInterfaceSubClass == UISUBCLASS_ETHERNET_NETWORKING_CONTROL_MODEL) return (UMATCH_IFACECLASS_GENERIC); return (UMATCH_NONE); } USB_ATTACH(cdce) { USB_ATTACH_START(cdce, sc, uaa); char *devinfop; int s; struct ifnet *ifp; usbd_device_handle dev = uaa->device; const struct cdce_type *t; usb_interface_descriptor_t *id; usb_endpoint_descriptor_t *ed; usb_cdc_union_descriptor_t *ud; int data_ifcno; u_int16_t macaddr_hi; int i; devinfop = usbd_devinfo_alloc(dev, 0); USB_ATTACH_SETUP; printf("%s: %s\n", USBDEVNAME(sc->cdce_dev), devinfop); usbd_devinfo_free(devinfop); sc->cdce_udev = uaa->device; sc->cdce_ctl_iface = uaa->iface; t = cdce_lookup(uaa->vendor, uaa->product); if (t) sc->cdce_flags = t->cdce_flags; if (sc->cdce_flags & CDCE_NO_UNION) sc->cdce_data_iface = sc->cdce_ctl_iface; else { ud = cdce_get_desc(sc->cdce_udev, UDESC_CS_INTERFACE, UDESCSUB_CDC_UNION); if (ud == NULL) { printf("%s: no union descriptor\n", USBDEVNAME(sc->cdce_dev)); USB_ATTACH_ERROR_RETURN; } data_ifcno = ud->bSlaveInterface[0]; for (i = 0; i < uaa->nifaces; i++) { if (uaa->ifaces[i] != NULL) { id = usbd_get_interface_descriptor( uaa->ifaces[i]); if (id != NULL && id->bInterfaceNumber == data_ifcno) { sc->cdce_data_iface = uaa->ifaces[i]; uaa->ifaces[i] = NULL; } } } } if (sc->cdce_data_iface == NULL) { printf("%s: no data interface\n", USBDEVNAME(sc->cdce_dev)); USB_ATTACH_ERROR_RETURN; } /* Find endpoints. */ id = usbd_get_interface_descriptor(sc->cdce_data_iface); sc->cdce_bulkin_no = sc->cdce_bulkout_no = -1; for (i = 0; i < id->bNumEndpoints; i++) { ed = usbd_interface2endpoint_descriptor(sc->cdce_data_iface, i); if (!ed) { printf("%s: could not read endpoint descriptor\n", USBDEVNAME(sc->cdce_dev)); USB_ATTACH_ERROR_RETURN; } if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { sc->cdce_bulkin_no = ed->bEndpointAddress; } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { sc->cdce_bulkout_no = ed->bEndpointAddress; } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) { /* XXX: CDC spec defines an interrupt pipe, but it is not * needed for simple host-to-host applications. */ } else { printf("%s: unexpected endpoint\n", USBDEVNAME(sc->cdce_dev)); } } if (sc->cdce_bulkin_no == -1) { printf("%s: could not find data bulk in\n", USBDEVNAME(sc->cdce_dev)); USB_ATTACH_ERROR_RETURN; } if (sc->cdce_bulkout_no == -1 ) { printf("%s: could not find data bulk out\n", USBDEVNAME(sc->cdce_dev)); USB_ATTACH_ERROR_RETURN; } s = splnet(); macaddr_hi = htons(0x2acb); bcopy(&macaddr_hi, &sc->cdce_arpcom.ac_enaddr[0], sizeof(u_int16_t)); bcopy(&ticks, &sc->cdce_arpcom.ac_enaddr[2], sizeof(u_int32_t)); sc->cdce_arpcom.ac_enaddr[5] = (u_int8_t)(sc->cdce_unit); printf("%s: address %s\n", USBDEVNAME(sc->cdce_dev), ether_sprintf(sc->cdce_arpcom.ac_enaddr)); ifp = GET_IFP(sc); ifp->if_softc = sc; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; ifp->if_ioctl = cdce_ioctl; ifp->if_start = cdce_start; ifp->if_watchdog = cdce_watchdog; strlcpy(ifp->if_xname, USBDEVNAME(sc->cdce_dev), IFNAMSIZ); IFQ_SET_READY(&ifp->if_snd); if_attach(ifp); Ether_ifattach(ifp, sc->cdce_arpcom.ac_enaddr); sc->cdce_attached = 1; splx(s); usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->cdce_udev, USBDEV(sc->cdce_dev)); USB_ATTACH_SUCCESS_RETURN; } USB_DETACH(cdce) { USB_DETACH_START(cdce, sc); struct ifnet *ifp = GET_IFP(sc); int s; s = splusb(); if (!sc->cdce_attached) { splx(s); return (0); } if (ifp->if_flags & IFF_RUNNING) cdce_stop(sc); ether_ifdetach(ifp); if_detach(ifp); sc->cdce_attached = 0; splx(s); return (0); } Static void cdce_start(struct ifnet *ifp) { struct cdce_softc *sc = ifp->if_softc; struct mbuf *m_head = NULL; if (sc->cdce_dying || (ifp->if_flags & IFF_OACTIVE)) return; IFQ_POLL(&ifp->if_snd, m_head); if (m_head == NULL) return; if (cdce_encap(sc, m_head, 0)) { ifp->if_flags |= IFF_OACTIVE; return; } IFQ_DEQUEUE(&ifp->if_snd, m_head); #if NBPFILTER > 0 if (ifp->if_bpf) BPF_MTAP(ifp, m_head); #endif ifp->if_flags |= IFF_OACTIVE; ifp->if_timer = 6; } Static int cdce_encap(struct cdce_softc *sc, struct mbuf *m, int idx) { struct cdce_chain *c; usbd_status err; int extra = 0; c = &sc->cdce_cdata.cdce_tx_chain[idx]; m_copydata(m, 0, m->m_pkthdr.len, c->cdce_buf); if (sc->cdce_flags & CDCE_ZAURUS) { /* Zaurus wants a 32-bit CRC appended to every frame */ u_int32_t crc; crc = cdce_crc32(c->cdce_buf, m->m_pkthdr.len); bcopy(&crc, c->cdce_buf + m->m_pkthdr.len, 4); extra = 4; } c->cdce_mbuf = m; usbd_setup_xfer(c->cdce_xfer, sc->cdce_bulkout_pipe, c, c->cdce_buf, m->m_pkthdr.len + extra, USBD_NO_COPY, 10000, cdce_txeof); err = usbd_transfer(c->cdce_xfer); if (err != USBD_IN_PROGRESS) { cdce_stop(sc); return (EIO); } sc->cdce_cdata.cdce_tx_cnt++; return (0); } Static void cdce_stop(struct cdce_softc *sc) { usbd_status err; struct ifnet *ifp = GET_IFP(sc); int i; ifp->if_timer = 0; ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); if (sc->cdce_bulkin_pipe != NULL) { err = usbd_abort_pipe(sc->cdce_bulkin_pipe); if (err) printf("%s: abort rx pipe failed: %s\n", USBDEVNAME(sc->cdce_dev), usbd_errstr(err)); err = usbd_close_pipe(sc->cdce_bulkin_pipe); if (err) printf("%s: close rx pipe failed: %s\n", USBDEVNAME(sc->cdce_dev), usbd_errstr(err)); sc->cdce_bulkin_pipe = NULL; } if (sc->cdce_bulkout_pipe != NULL) { err = usbd_abort_pipe(sc->cdce_bulkout_pipe); if (err) printf("%s: abort tx pipe failed: %s\n", USBDEVNAME(sc->cdce_dev), usbd_errstr(err)); err = usbd_close_pipe(sc->cdce_bulkout_pipe); if (err) printf("%s: close tx pipe failed: %s\n", USBDEVNAME(sc->cdce_dev), usbd_errstr(err)); sc->cdce_bulkout_pipe = NULL; } for (i = 0; i < CDCE_RX_LIST_CNT; i++) { if (sc->cdce_cdata.cdce_rx_chain[i].cdce_mbuf != NULL) { m_freem(sc->cdce_cdata.cdce_rx_chain[i].cdce_mbuf); sc->cdce_cdata.cdce_rx_chain[i].cdce_mbuf = NULL; } if (sc->cdce_cdata.cdce_rx_chain[i].cdce_xfer != NULL) { usbd_free_xfer(sc->cdce_cdata.cdce_rx_chain[i].cdce_xfer); sc->cdce_cdata.cdce_rx_chain[i].cdce_xfer = NULL; } } for (i = 0; i < CDCE_TX_LIST_CNT; i++) { if (sc->cdce_cdata.cdce_tx_chain[i].cdce_mbuf != NULL) { m_freem(sc->cdce_cdata.cdce_tx_chain[i].cdce_mbuf); sc->cdce_cdata.cdce_tx_chain[i].cdce_mbuf = NULL; } if (sc->cdce_cdata.cdce_tx_chain[i].cdce_xfer != NULL) { usbd_free_xfer(sc->cdce_cdata.cdce_tx_chain[i].cdce_xfer); sc->cdce_cdata.cdce_tx_chain[i].cdce_xfer = NULL; } } } Static int cdce_ioctl(struct ifnet *ifp, u_long command, caddr_t data) { struct cdce_softc *sc = ifp->if_softc; struct ifaddr *ifa = (struct ifaddr *)data; struct ifreq *ifr = (struct ifreq *)data; int s, error = 0; if (sc->cdce_dying) return (EIO); s = splnet(); switch(command) { case SIOCSIFADDR: ifp->if_flags |= IFF_UP; cdce_init(sc); switch (ifa->ifa_addr->sa_family) { case AF_INET: arp_ifinit(&sc->cdce_arpcom, ifa); break; } break; case SIOCSIFMTU: if (ifr->ifr_mtu > ETHERMTU) error = EINVAL; else ifp->if_mtu = ifr->ifr_mtu; break; case SIOCSIFFLAGS: if (ifp->if_flags & IFF_UP) { if (!(ifp->if_flags & IFF_RUNNING)) cdce_init(sc); } else { if (ifp->if_flags & IFF_RUNNING) cdce_stop(sc); } error = 0; break; default: error = EINVAL; break; } splx(s); return (error); } Static void cdce_watchdog(struct ifnet *ifp) { struct cdce_softc *sc = ifp->if_softc; if (sc->cdce_dying) return; ifp->if_oerrors++; printf("%s: watchdog timeout\n", USBDEVNAME(sc->cdce_dev)); } Static void cdce_init(void *xsc) { struct cdce_softc *sc = xsc; struct ifnet *ifp = GET_IFP(sc); struct cdce_chain *c; usbd_status err; int s, i; if (ifp->if_flags & IFF_RUNNING) return; s = splnet(); if (cdce_tx_list_init(sc) == ENOBUFS) { printf("%s: tx list init failed\n", USBDEVNAME(sc->cdce_dev)); splx(s); return; } if (cdce_rx_list_init(sc) == ENOBUFS) { printf("%s: rx list init failed\n", USBDEVNAME(sc->cdce_dev)); splx(s); return; } /* Maybe set multicast / broadcast here??? */ err = usbd_open_pipe(sc->cdce_data_iface, sc->cdce_bulkin_no, USBD_EXCLUSIVE_USE, &sc->cdce_bulkin_pipe); if (err) { printf("%s: open rx pipe failed: %s\n", USBDEVNAME(sc->cdce_dev), usbd_errstr(err)); splx(s); return; } err = usbd_open_pipe(sc->cdce_data_iface, sc->cdce_bulkout_no, USBD_EXCLUSIVE_USE, &sc->cdce_bulkout_pipe); if (err) { printf("%s: open tx pipe failed: %s\n", USBDEVNAME(sc->cdce_dev), usbd_errstr(err)); splx(s); return; } for (i = 0; i < CDCE_RX_LIST_CNT; i++) { c = &sc->cdce_cdata.cdce_rx_chain[i]; usbd_setup_xfer(c->cdce_xfer, sc->cdce_bulkin_pipe, c, c->cdce_buf, CDCE_BUFSZ, USBD_SHORT_XFER_OK | USBD_NO_COPY, USBD_NO_TIMEOUT, cdce_rxeof); usbd_transfer(c->cdce_xfer); } ifp->if_flags |= IFF_RUNNING; ifp->if_flags &= ~IFF_OACTIVE; splx(s); } Static int cdce_newbuf(struct cdce_softc *sc, struct cdce_chain *c, struct mbuf *m) { struct mbuf *m_new = NULL; if (m == NULL) { MGETHDR(m_new, M_DONTWAIT, MT_DATA); if (m_new == NULL) { printf("%s: no memory for rx list " "-- packet dropped!\n", USBDEVNAME(sc->cdce_dev)); return (ENOBUFS); } MCLGET(m_new, M_DONTWAIT); if (!(m_new->m_flags & M_EXT)) { printf("%s: no memory for rx list " "-- packet dropped!\n", USBDEVNAME(sc->cdce_dev)); m_freem(m_new); return (ENOBUFS); } m_new->m_len = m_new->m_pkthdr.len = MCLBYTES; } else { m_new = m; m_new->m_len = m_new->m_pkthdr.len = MCLBYTES; m_new->m_data = m_new->m_ext.ext_buf; } m_adj(m_new, ETHER_ALIGN); c->cdce_mbuf = m_new; return (0); } Static int cdce_rx_list_init(struct cdce_softc *sc) { struct cdce_cdata *cd; struct cdce_chain *c; int i; cd = &sc->cdce_cdata; for (i = 0; i < CDCE_RX_LIST_CNT; i++) { c = &cd->cdce_rx_chain[i]; c->cdce_sc = sc; c->cdce_idx = i; if (cdce_newbuf(sc, c, NULL) == ENOBUFS) return (ENOBUFS); if (c->cdce_xfer == NULL) { c->cdce_xfer = usbd_alloc_xfer(sc->cdce_udev); if (c->cdce_xfer == NULL) return (ENOBUFS); c->cdce_buf = usbd_alloc_buffer(c->cdce_xfer, CDCE_BUFSZ); if (c->cdce_buf == NULL) return (ENOBUFS); } } return (0); } Static int cdce_tx_list_init(struct cdce_softc *sc) { struct cdce_cdata *cd; struct cdce_chain *c; int i; cd = &sc->cdce_cdata; for (i = 0; i < CDCE_TX_LIST_CNT; i++) { c = &cd->cdce_tx_chain[i]; c->cdce_sc = sc; c->cdce_idx = i; c->cdce_mbuf = NULL; if (c->cdce_xfer == NULL) { c->cdce_xfer = usbd_alloc_xfer(sc->cdce_udev); if (c->cdce_xfer == NULL) return (ENOBUFS); c->cdce_buf = usbd_alloc_buffer(c->cdce_xfer, CDCE_BUFSZ); if (c->cdce_buf == NULL) return (ENOBUFS); } } return (0); } Static void cdce_rxeof(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status) { struct cdce_chain *c = priv; struct cdce_softc *sc = c->cdce_sc; struct ifnet *ifp = GET_IFP(sc); struct mbuf *m; int total_len = 0; int s; if (sc->cdce_dying || !(ifp->if_flags & IFF_RUNNING)) return; if (status != USBD_NORMAL_COMPLETION) { if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) return; if (sc->cdce_rxeof_errors == 0) printf("%s: usb error on rx: %s\n", USBDEVNAME(sc->cdce_dev), usbd_errstr(status)); if (status == USBD_STALLED) usbd_clear_endpoint_stall(sc->cdce_bulkin_pipe); DELAY(sc->cdce_rxeof_errors * 10000); sc->cdce_rxeof_errors++; goto done; } sc->cdce_rxeof_errors = 0; usbd_get_xfer_status(xfer, NULL, NULL, &total_len, NULL); if (sc->cdce_flags & CDCE_ZAURUS) total_len -= 4; /* Strip off CRC added by Zaurus */ if (total_len <= 1) goto done; m = c->cdce_mbuf; memcpy(mtod(m, char *), c->cdce_buf, total_len); if (total_len < sizeof(struct ether_header)) { ifp->if_ierrors++; goto done; } ifp->if_ipackets++; m->m_pkthdr.len = m->m_len = total_len; m->m_pkthdr.rcvif = ifp; s = splnet(); if (cdce_newbuf(sc, c, NULL) == ENOBUFS) { ifp->if_ierrors++; goto done1; } #if NBPFILTER > 0 if (ifp->if_bpf) BPF_MTAP(ifp, m); #endif IF_INPUT(ifp, m); done1: splx(s); done: /* Setup new transfer. */ usbd_setup_xfer(c->cdce_xfer, sc->cdce_bulkin_pipe, c, c->cdce_buf, CDCE_BUFSZ, USBD_SHORT_XFER_OK | USBD_NO_COPY, USBD_NO_TIMEOUT, cdce_rxeof); usbd_transfer(c->cdce_xfer); } Static void cdce_txeof(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status) { struct cdce_chain *c = priv; struct cdce_softc *sc = c->cdce_sc; struct ifnet *ifp = GET_IFP(sc); usbd_status err; int s; if (sc->cdce_dying) return; s = splnet(); ifp->if_timer = 0; ifp->if_flags &= ~IFF_OACTIVE; if (status != USBD_NORMAL_COMPLETION) { if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) { splx(s); return; } ifp->if_oerrors++; printf("%s: usb error on tx: %s\n", USBDEVNAME(sc->cdce_dev), usbd_errstr(status)); if (status == USBD_STALLED) usbd_clear_endpoint_stall(sc->cdce_bulkout_pipe); splx(s); return; } usbd_get_xfer_status(c->cdce_xfer, NULL, NULL, NULL, &err); if (c->cdce_mbuf != NULL) { m_freem(c->cdce_mbuf); c->cdce_mbuf = NULL; } if (err) ifp->if_oerrors++; else ifp->if_opackets++; if (IFQ_IS_EMPTY(&ifp->if_snd) == 0) cdce_start(ifp); splx(s); } void * cdce_get_desc(usbd_device_handle dev, int type, int subtype) { usb_descriptor_t *desc; usb_config_descriptor_t *cd = usbd_get_config_descriptor(dev); uByte *p = (uByte *)cd; uByte *end = p + UGETW(cd->wTotalLength); while (p < end) { desc = (usb_descriptor_t *)p; if (desc->bDescriptorType == type && desc->bDescriptorSubtype == subtype) return (desc); p += desc->bLength; } return (NULL); } int cdce_activate(device_ptr_t self, enum devact act) { struct cdce_softc *sc = (struct cdce_softc *)self; switch (act) { case DVACT_ACTIVATE: return (EOPNOTSUPP); break; case DVACT_DEACTIVATE: if_deactivate(GET_IFP(sc)); sc->cdce_dying = 1; break; } return (0); } /* COPYRIGHT (C) 1986 Gary S. Brown. You may use this program, or * code or tables extracted from it, as desired without restriction. */ static uint32_t cdce_crc32_tab[] = { 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d }; uint32_t cdce_crc32(const void *buf, size_t size) { const uint8_t *p; uint32_t crc; p = buf; crc = ~0U; while (size--) crc = cdce_crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8); return (htole32(crc) ^ ~0U); }