// SPDX-License-Identifier: GPL-2.0
|
/*
|
* Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
|
*/
|
|
#include <linux/if_arp.h>
|
#include <linux/init.h>
|
#include <linux/netdevice.h>
|
#include <linux/string.h>
|
#include <net_kern.h>
|
#include <net_user.h>
|
#include "slirp.h"
|
|
struct slirp_init {
|
struct arg_list_dummy_wrapper argw; /* XXX should be simpler... */
|
};
|
|
void slirp_init(struct net_device *dev, void *data)
|
{
|
struct uml_net_private *private;
|
struct slirp_data *spri;
|
struct slirp_init *init = data;
|
int i;
|
|
private = netdev_priv(dev);
|
spri = (struct slirp_data *) private->user;
|
|
spri->argw = init->argw;
|
spri->pid = -1;
|
spri->slave = -1;
|
spri->dev = dev;
|
|
slip_proto_init(&spri->slip);
|
|
dev->hard_header_len = 0;
|
dev->header_ops = NULL;
|
dev->addr_len = 0;
|
dev->type = ARPHRD_SLIP;
|
dev->tx_queue_len = 256;
|
dev->flags = IFF_NOARP;
|
printk("SLIRP backend - command line:");
|
for (i = 0; spri->argw.argv[i] != NULL; i++)
|
printk(" '%s'",spri->argw.argv[i]);
|
printk("\n");
|
}
|
|
static unsigned short slirp_protocol(struct sk_buff *skbuff)
|
{
|
return htons(ETH_P_IP);
|
}
|
|
static int slirp_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
|
{
|
return slirp_user_read(fd, skb_mac_header(skb), skb->dev->mtu,
|
(struct slirp_data *) &lp->user);
|
}
|
|
static int slirp_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
|
{
|
return slirp_user_write(fd, skb->data, skb->len,
|
(struct slirp_data *) &lp->user);
|
}
|
|
const struct net_kern_info slirp_kern_info = {
|
.init = slirp_init,
|
.protocol = slirp_protocol,
|
.read = slirp_read,
|
.write = slirp_write,
|
};
|
|
static int slirp_setup(char *str, char **mac_out, void *data)
|
{
|
struct slirp_init *init = data;
|
int i=0;
|
|
*init = ((struct slirp_init) { .argw = { { "slirp", NULL } } });
|
|
str = split_if_spec(str, mac_out, NULL);
|
|
if (str == NULL) /* no command line given after MAC addr */
|
return 1;
|
|
do {
|
if (i >= SLIRP_MAX_ARGS - 1) {
|
printk(KERN_WARNING "slirp_setup: truncating slirp "
|
"arguments\n");
|
break;
|
}
|
init->argw.argv[i++] = str;
|
while(*str && *str!=',') {
|
if (*str == '_')
|
*str=' ';
|
str++;
|
}
|
if (*str != ',')
|
break;
|
*str++ = '\0';
|
} while (1);
|
|
init->argw.argv[i] = NULL;
|
return 1;
|
}
|
|
static struct transport slirp_transport = {
|
.list = LIST_HEAD_INIT(slirp_transport.list),
|
.name = "slirp",
|
.setup = slirp_setup,
|
.user = &slirp_user_info,
|
.kern = &slirp_kern_info,
|
.private_size = sizeof(struct slirp_data),
|
.setup_size = sizeof(struct slirp_init),
|
};
|
|
static int register_slirp(void)
|
{
|
register_transport(&slirp_transport);
|
return 0;
|
}
|
|
late_initcall(register_slirp);
|
