* grub-core/net/drivers/emu/emunet.c: Move to ..

* grub-core/osdep/linux/emunet.c: ..here.
2013-10-08 18:42:46 +02:00 · 2013-10-08 18:42:46 +02:00 · aabe433afe
commit aabe433afe
parent 9a2c903f28
5 changed files with 35 additions and 11 deletions
--- a/grub-core/osdep/linux/emunet.c
+++ b/grub-core/osdep/linux/emunet.c
@ -0,0 +1,122 @@
+/*
+ *  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 <grub/dl.h>
+#include <grub/net/netbuff.h>
+#include <sys/socket.h>
+#include <grub/net.h>
+#include <sys/types.h>
+#include <linux/if.h>
+#include <linux/if_tun.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <grub/term.h>
+#include <grub/i18n.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+static int fd;
+
+static grub_err_t 
+send_card_buffer (struct grub_net_card *dev __attribute__ ((unused)),
+		  struct grub_net_buff *pack)
+{
+  ssize_t actual;
+
+  actual = write (fd, pack->data, pack->tail - pack->data);
+  if (actual < 0)
+    return grub_error (GRUB_ERR_IO, N_("couldn't send network packet"));
+
+  return GRUB_ERR_NONE;
+}
+
+static struct grub_net_buff *
+get_card_packet (struct grub_net_card *dev __attribute__ ((unused)))
+{
+  ssize_t actual;
+  struct grub_net_buff *nb;
+
+  nb = grub_netbuff_alloc (1536 + 2);
+  if (!nb)
+    return NULL;
+
+  /* Reserve 2 bytes so that 2 + 14/18 bytes of ethernet header is divisible
+     by 4. So that IP header is aligned on 4 bytes. */
+  grub_netbuff_reserve (nb, 2);
+  if (!nb)
+    {
+      grub_netbuff_free (nb);
+      return NULL;
+    }
+
+  actual = read (fd, nb->data, 1536);
+  if (actual < 0)
+    {
+      grub_netbuff_free (nb);
+      return NULL;
+    }
+  grub_netbuff_put (nb, actual);
+
+  return nb;
+}
+
+static struct grub_net_card_driver emudriver = 
+  {
+    .name = "emu",
+    .send = send_card_buffer,
+    .recv = get_card_packet
+  };
+
+static struct grub_net_card emucard = 
+  {
+    .name = "emu0",
+    .driver = &emudriver,
+    .mtu = 1500,
+    .default_address = {
+			 .type = GRUB_NET_LINK_LEVEL_PROTOCOL_ETHERNET,
+			 {.mac = {0, 1, 2, 3, 4, 5}}
+		       },
+    .flags = 0
+  };
+
+GRUB_MOD_INIT(emunet)
+{
+  struct ifreq ifr;
+  fd = open ("/dev/net/tun", O_RDWR | O_NONBLOCK);
+  if (fd < 0)
+    return;
+  grub_memset (&ifr, 0, sizeof (ifr));
+  ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
+  if (ioctl (fd, TUNSETIFF, &ifr) < 0)
+    {
+      close (fd);
+      fd = -1;
+      return;
+    }
+  grub_net_card_register (&emucard);
+}
+
+GRUB_MOD_FINI(emunet)
+{
+  if (fd >= 0)
+    {
+      close (fd);
+      grub_net_card_unregister (&emucard);
+    }
+}