summaryrefslogtreecommitdiffstats
path: root/qemu/roms/ipxe/src/drivers/linux/tap.c
diff options
context:
space:
mode:
Diffstat (limited to 'qemu/roms/ipxe/src/drivers/linux/tap.c')
-rw-r--r--qemu/roms/ipxe/src/drivers/linux/tap.c253
1 files changed, 0 insertions, 253 deletions
diff --git a/qemu/roms/ipxe/src/drivers/linux/tap.c b/qemu/roms/ipxe/src/drivers/linux/tap.c
deleted file mode 100644
index 979436654..000000000
--- a/qemu/roms/ipxe/src/drivers/linux/tap.c
+++ /dev/null
@@ -1,253 +0,0 @@
-/*
- * Copyright (C) 2010 Piotr JaroszyƄski <p.jaroszynski@gmail.com>
- *
- * This program 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 2 of the
- * License, or any later version.
- *
- * This program 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 this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <errno.h>
-#include <string.h>
-#include <stdio.h>
-#include <linux_api.h>
-#include <ipxe/list.h>
-#include <ipxe/linux.h>
-#include <ipxe/malloc.h>
-#include <ipxe/device.h>
-#include <ipxe/netdevice.h>
-#include <ipxe/iobuf.h>
-#include <ipxe/ethernet.h>
-#include <ipxe/settings.h>
-#include <ipxe/socket.h>
-
-/* This hack prevents pre-2.6.32 headers from redefining struct sockaddr */
-#define __GLIBC__ 2
-#include <linux/socket.h>
-#undef __GLIBC__
-#include <linux/if.h>
-#include <linux/if_ether.h>
-#include <linux/if_tun.h>
-
-#define RX_BUF_SIZE 1536
-
-/** @file
- *
- * The TAP driver.
- *
- * The TAP is a Virtual Ethernet network device.
- */
-
-struct tap_nic {
- /** Tap interface name */
- char * interface;
- /** File descriptor of the opened tap device */
- int fd;
-};
-
-/** Open the TAP device */
-static int tap_open(struct net_device * netdev)
-{
- struct tap_nic * nic = netdev->priv;
- struct ifreq ifr;
- int ret;
-
- nic->fd = linux_open("/dev/net/tun", O_RDWR);
- if (nic->fd < 0) {
- DBGC(nic, "tap %p open('/dev/net/tun') = %d (%s)\n", nic, nic->fd, linux_strerror(linux_errno));
- return nic->fd;
- }
-
- memset(&ifr, 0, sizeof(ifr));
- /* IFF_NO_PI for no extra packet information */
- ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
- strncpy(ifr.ifr_name, nic->interface, IFNAMSIZ);
- DBGC(nic, "tap %p interface = '%s'\n", nic, nic->interface);
-
- ret = linux_ioctl(nic->fd, TUNSETIFF, &ifr);
-
- if (ret != 0) {
- DBGC(nic, "tap %p ioctl(%d, ...) = %d (%s)\n", nic, nic->fd, ret, linux_strerror(linux_errno));
- linux_close(nic->fd);
- return ret;
- }
-
- /* Set nonblocking mode to make tap_poll easier */
- ret = linux_fcntl(nic->fd, F_SETFL, O_NONBLOCK);
-
- if (ret != 0) {
- DBGC(nic, "tap %p fcntl(%d, ...) = %d (%s)\n", nic, nic->fd, ret, linux_strerror(linux_errno));
- linux_close(nic->fd);
- return ret;
- }
-
- return 0;
-}
-
-/** Close the TAP device */
-static void tap_close(struct net_device *netdev)
-{
- struct tap_nic * nic = netdev->priv;
- linux_close(nic->fd);
-}
-
-/**
- * Transmit an ethernet packet.
- *
- * The packet can be written to the TAP device and marked as complete immediately.
- */
-static int tap_transmit(struct net_device *netdev, struct io_buffer *iobuf)
-{
- struct tap_nic * nic = netdev->priv;
- int rc;
-
- /* Pad and align packet */
- iob_pad(iobuf, ETH_ZLEN);
-
- rc = linux_write(nic->fd, iobuf->data, iobuf->tail - iobuf->data);
- DBGC2(nic, "tap %p wrote %d bytes\n", nic, rc);
- netdev_tx_complete(netdev, iobuf);
-
- return 0;
-}
-
-/** Poll for new packets */
-static void tap_poll(struct net_device *netdev)
-{
- struct tap_nic * nic = netdev->priv;
- struct pollfd pfd;
- struct io_buffer * iobuf;
- int r;
-
- pfd.fd = nic->fd;
- pfd.events = POLLIN;
- if (linux_poll(&pfd, 1, 0) == -1) {
- DBGC(nic, "tap %p poll failed (%s)\n", nic, linux_strerror(linux_errno));
- return;
- }
- if ((pfd.revents & POLLIN) == 0)
- return;
-
- /* At this point we know there is at least one new packet to be read */
-
- iobuf = alloc_iob(RX_BUF_SIZE);
- if (! iobuf)
- goto allocfail;
-
- while ((r = linux_read(nic->fd, iobuf->data, RX_BUF_SIZE)) > 0) {
- DBGC2(nic, "tap %p read %d bytes\n", nic, r);
-
- iob_put(iobuf, r);
- netdev_rx(netdev, iobuf);
-
- iobuf = alloc_iob(RX_BUF_SIZE);
- if (! iobuf)
- goto allocfail;
- }
-
- free_iob(iobuf);
- return;
-
-allocfail:
- DBGC(nic, "tap %p alloc_iob failed\n", nic);
-}
-
-/**
- * Set irq.
- *
- * Not used on linux, provide a dummy implementation.
- */
-static void tap_irq(struct net_device *netdev, int enable)
-{
- struct tap_nic *nic = netdev->priv;
-
- DBGC(nic, "tap %p irq enable = %d\n", nic, enable);
-}
-
-/** Tap operations */
-static struct net_device_operations tap_operations = {
- .open = tap_open,
- .close = tap_close,
- .transmit = tap_transmit,
- .poll = tap_poll,
- .irq = tap_irq,
-};
-
-/** Handle a device request for the tap driver */
-static int tap_probe(struct linux_device *device, struct linux_device_request *request)
-{
- struct linux_setting *if_setting;
- struct net_device *netdev;
- struct tap_nic *nic;
- int rc;
-
- netdev = alloc_etherdev(sizeof(*nic));
- if (! netdev)
- return -ENOMEM;
-
- netdev_init(netdev, &tap_operations);
- nic = netdev->priv;
- linux_set_drvdata(device, netdev);
- netdev->dev = &device->dev;
- memset(nic, 0, sizeof(*nic));
-
- /* Look for the mandatory if setting */
- if_setting = linux_find_setting("if", &request->settings);
-
- /* No if setting */
- if (! if_setting) {
- printf("tap missing a mandatory if setting\n");
- rc = -EINVAL;
- goto err_settings;
- }
-
- nic->interface = if_setting->value;
- snprintf ( device->dev.name, sizeof ( device->dev.name ), "%s",
- nic->interface );
- device->dev.desc.bus_type = BUS_TYPE_TAP;
- if_setting->applied = 1;
-
- /* Apply rest of the settings */
- linux_apply_settings(&request->settings, &netdev->settings.settings);
-
- /* Register network device */
- if ((rc = register_netdev(netdev)) != 0)
- goto err_register;
-
- netdev_link_up(netdev);
-
- return 0;
-
-err_settings:
- unregister_netdev(netdev);
-err_register:
- netdev_nullify(netdev);
- netdev_put(netdev);
- return rc;
-}
-
-/** Remove the device */
-static void tap_remove(struct linux_device *device)
-{
- struct net_device *netdev = linux_get_drvdata(device);
- unregister_netdev(netdev);
- netdev_nullify(netdev);
- netdev_put(netdev);
-}
-
-/** Tap linux_driver */
-struct linux_driver tap_driver __linux_driver = {
- .name = "tap",
- .probe = tap_probe,
- .remove = tap_remove,
- .can_probe = 1,
-};