diff options
Diffstat (limited to 'grub-core/osdep/linux/emunet.c')
-rw-r--r-- | grub-core/osdep/linux/emunet.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/grub-core/osdep/linux/emunet.c b/grub-core/osdep/linux/emunet.c new file mode 100644 index 0000000..19b188f --- /dev/null +++ b/grub-core/osdep/linux/emunet.c @@ -0,0 +1,74 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2010,2011,2012,2013 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <config.h> +#include <config-util.h> + +#include <sys/socket.h> +#include <sys/types.h> +#include <linux/if.h> +#include <linux/if_tun.h> +#include <unistd.h> +#include <sys/ioctl.h> +#include <fcntl.h> +#include <string.h> + +#include <grub/emu/net.h> + +static int fd; + +grub_ssize_t +grub_emunet_send (const void *packet, grub_size_t sz) +{ + return write (fd, packet, sz); +} + +grub_ssize_t +grub_emunet_receive (void *packet, grub_size_t sz) +{ + return read (fd, packet, sz); +} + +int +grub_emunet_create (grub_size_t *mtu) +{ + struct ifreq ifr; + *mtu = 1500; + fd = open ("/dev/net/tun", O_RDWR | O_NONBLOCK); + if (fd < 0) + return -1; + memset (&ifr, 0, sizeof (ifr)); + ifr.ifr_flags = IFF_TAP | IFF_NO_PI; + if (ioctl (fd, TUNSETIFF, &ifr) < 0) + { + close (fd); + fd = -1; + return -1; + } + return 0; +} + +void +grub_emunet_close (void) +{ + if (fd < 0) + return; + + close (fd); + fd = -1; +} |