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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /arch/um/os-Linux/drivers/ethertap_kern.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/um/os-Linux/drivers/ethertap_kern.c')
-rw-r--r-- | arch/um/os-Linux/drivers/ethertap_kern.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/arch/um/os-Linux/drivers/ethertap_kern.c b/arch/um/os-Linux/drivers/ethertap_kern.c new file mode 100644 index 000000000..3182e759d --- /dev/null +++ b/arch/um/os-Linux/drivers/ethertap_kern.c @@ -0,0 +1,100 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and + * James Leu (jleu@mindspring.net). + * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) + * Copyright (C) 2001 by various other people who didn't put their name here. + */ + +#include <linux/init.h> +#include <linux/netdevice.h> +#include "etap.h" +#include <net_kern.h> + +struct ethertap_init { + char *dev_name; + char *gate_addr; +}; + +static void etap_init(struct net_device *dev, void *data) +{ + struct uml_net_private *pri; + struct ethertap_data *epri; + struct ethertap_init *init = data; + + pri = netdev_priv(dev); + epri = (struct ethertap_data *) pri->user; + epri->dev_name = init->dev_name; + epri->gate_addr = init->gate_addr; + epri->data_fd = -1; + epri->control_fd = -1; + epri->dev = dev; + + printk(KERN_INFO "ethertap backend - %s", epri->dev_name); + if (epri->gate_addr != NULL) + printk(KERN_CONT ", IP = %s", epri->gate_addr); + printk(KERN_CONT "\n"); +} + +static int etap_read(int fd, struct sk_buff *skb, struct uml_net_private *lp) +{ + int len; + + len = net_recvfrom(fd, skb_mac_header(skb), + skb->dev->mtu + 2 + ETH_HEADER_ETHERTAP); + if (len <= 0) + return(len); + + skb_pull(skb, 2); + len -= 2; + return len; +} + +static int etap_write(int fd, struct sk_buff *skb, struct uml_net_private *lp) +{ + skb_push(skb, 2); + return net_send(fd, skb->data, skb->len); +} + +const struct net_kern_info ethertap_kern_info = { + .init = etap_init, + .protocol = eth_protocol, + .read = etap_read, + .write = etap_write, +}; + +int ethertap_setup(char *str, char **mac_out, void *data) +{ + struct ethertap_init *init = data; + + *init = ((struct ethertap_init) + { .dev_name = NULL, + .gate_addr = NULL }); + if (tap_setup_common(str, "ethertap", &init->dev_name, mac_out, + &init->gate_addr)) + return 0; + if (init->dev_name == NULL) { + printk(KERN_ERR "ethertap_setup : Missing tap device name\n"); + return 0; + } + + return 1; +} + +static struct transport ethertap_transport = { + .list = LIST_HEAD_INIT(ethertap_transport.list), + .name = "ethertap", + .setup = ethertap_setup, + .user = ðertap_user_info, + .kern = ðertap_kern_info, + .private_size = sizeof(struct ethertap_data), + .setup_size = sizeof(struct ethertap_init), +}; + +static int register_ethertap(void) +{ + register_transport(ðertap_transport); + return 0; +} + +late_initcall(register_ethertap); |