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/* |
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device-darwin.C -- device driver for mac os x |
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Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de> |
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|
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This file is part of GVPE. |
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|
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GVPE is free software; you can redistribute it and/or modify it |
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under the terms of the GNU General Public License as published by the |
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Free Software Foundation; either version 3 of the License, or (at your |
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option) any later version. |
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|
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This program is distributed in the hope that it will be useful, but |
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WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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Public License for more details. |
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|
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You should have received a copy of the GNU General Public License along |
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with this program; if not, see <http://www.gnu.org/licenses/>. |
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|
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Additional permission under GNU GPL version 3 section 7 |
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|
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If you modify this Program, or any covered work, by linking or |
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combining it with the OpenSSL project's OpenSSL library (or a modified |
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version of that library), containing parts covered by the terms of the |
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OpenSSL or SSLeay licenses, the licensors of this Program grant you |
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additional permission to convey the resulting work. Corresponding |
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Source for a non-source form of such a combination shall include the |
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source code for the parts of OpenSSL used as well as that of the |
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covered work. |
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*/ |
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|
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// uses the kernel driver at: |
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// http://www-user.rhrk.uni-kl.de/~nissler/tuntap/ |
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|
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#include <cstdio> |
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#include <cstring> |
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#include <cerrno> |
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|
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <sys/ioctl.h> |
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#include <unistd.h> |
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#include <syslog.h> |
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#include <fcntl.h> |
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|
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#include "conf.h" |
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|
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// following headers used by cygwin (maybe others) |
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#include "netcompat.h" |
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#include <signal.h> |
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|
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#define DEFAULT_DEVICE "/dev/tap0" |
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|
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const char * |
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tap_device::info () |
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{ |
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return _("darwin tap driver"); |
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} |
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|
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const char * |
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tap_device::if_up () |
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{ |
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return "/sbin/ifconfig $IFNAME ether $MAC mtu $MTU"; |
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} |
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|
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tap_device::tap_device () |
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{ |
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const char *device = conf.ifname ? conf.ifname : DEFAULT_DEVICE; |
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|
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if ((fd = open (device, O_RDWR | O_NONBLOCK)) < 0) |
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{ |
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slog (L_ERR, _("could not open device %s: %s"), device, strerror (errno)); |
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exit (EXIT_FAILURE); |
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} |
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|
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slog (L_DEBUG, _("interface %s on %s initialized"), info (), device); |
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|
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strcpy (ifrname, rindex(device, '/') ? rindex(device, '/') + 1 : device); |
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} |
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|
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tap_device::~tap_device () |
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{ |
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close (fd); |
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} |
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|
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tap_packet * |
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tap_device::recv () |
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{ |
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tap_packet *pkt = new tap_packet; |
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|
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pkt->len = read (fd, &((*pkt)[0]), MAX_MTU); |
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|
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if (pkt->len <= 0) |
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{ |
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delete pkt; |
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slog (L_ERR, _("error while reading from %s %s: %s"), |
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info (), DEFAULT_DEVICE, strerror (errno)); |
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return 0; |
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} |
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|
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return pkt; |
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} |
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|
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void |
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tap_device::send (tap_packet *pkt) |
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{ |
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if (write (fd, &((*pkt)[0]), pkt->len) < 0) |
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slog (L_ERR, _("can't write to %s %s: %s"), info (), DEFAULT_DEVICE, |
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strerror (errno)); |
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} |
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