mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-06 05:36:39 +07:00
37185b3324
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
189 lines
4.6 KiB
C
189 lines
4.6 KiB
C
/*
|
|
* user-mode-linux networking multicast transport
|
|
* Copyright (C) 2001 by Harald Welte <laforge@gnumonks.org>
|
|
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
|
|
*
|
|
* based on the existing uml-networking code, which is
|
|
* Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
|
|
* James Leu (jleu@mindspring.net).
|
|
* Copyright (C) 2001 by various other people who didn't put their name here.
|
|
*
|
|
* Licensed under the GPL.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/netdevice.h>
|
|
#include "umcast.h"
|
|
#include <net_kern.h>
|
|
|
|
struct umcast_init {
|
|
char *addr;
|
|
int lport;
|
|
int rport;
|
|
int ttl;
|
|
bool unicast;
|
|
};
|
|
|
|
static void umcast_init(struct net_device *dev, void *data)
|
|
{
|
|
struct uml_net_private *pri;
|
|
struct umcast_data *dpri;
|
|
struct umcast_init *init = data;
|
|
|
|
pri = netdev_priv(dev);
|
|
dpri = (struct umcast_data *) pri->user;
|
|
dpri->addr = init->addr;
|
|
dpri->lport = init->lport;
|
|
dpri->rport = init->rport;
|
|
dpri->unicast = init->unicast;
|
|
dpri->ttl = init->ttl;
|
|
dpri->dev = dev;
|
|
|
|
if (dpri->unicast) {
|
|
printk(KERN_INFO "ucast backend address: %s:%u listen port: "
|
|
"%u\n", dpri->addr, dpri->rport, dpri->lport);
|
|
} else {
|
|
printk(KERN_INFO "mcast backend multicast address: %s:%u, "
|
|
"TTL:%u\n", dpri->addr, dpri->lport, dpri->ttl);
|
|
}
|
|
}
|
|
|
|
static int umcast_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
|
|
{
|
|
return net_recvfrom(fd, skb_mac_header(skb),
|
|
skb->dev->mtu + ETH_HEADER_OTHER);
|
|
}
|
|
|
|
static int umcast_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
|
|
{
|
|
return umcast_user_write(fd, skb->data, skb->len,
|
|
(struct umcast_data *) &lp->user);
|
|
}
|
|
|
|
static const struct net_kern_info umcast_kern_info = {
|
|
.init = umcast_init,
|
|
.protocol = eth_protocol,
|
|
.read = umcast_read,
|
|
.write = umcast_write,
|
|
};
|
|
|
|
static int mcast_setup(char *str, char **mac_out, void *data)
|
|
{
|
|
struct umcast_init *init = data;
|
|
char *port_str = NULL, *ttl_str = NULL, *remain;
|
|
char *last;
|
|
|
|
*init = ((struct umcast_init)
|
|
{ .addr = "239.192.168.1",
|
|
.lport = 1102,
|
|
.ttl = 1 });
|
|
|
|
remain = split_if_spec(str, mac_out, &init->addr, &port_str, &ttl_str,
|
|
NULL);
|
|
if (remain != NULL) {
|
|
printk(KERN_ERR "mcast_setup - Extra garbage on "
|
|
"specification : '%s'\n", remain);
|
|
return 0;
|
|
}
|
|
|
|
if (port_str != NULL) {
|
|
init->lport = simple_strtoul(port_str, &last, 10);
|
|
if ((*last != '\0') || (last == port_str)) {
|
|
printk(KERN_ERR "mcast_setup - Bad port : '%s'\n",
|
|
port_str);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (ttl_str != NULL) {
|
|
init->ttl = simple_strtoul(ttl_str, &last, 10);
|
|
if ((*last != '\0') || (last == ttl_str)) {
|
|
printk(KERN_ERR "mcast_setup - Bad ttl : '%s'\n",
|
|
ttl_str);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
init->unicast = false;
|
|
init->rport = init->lport;
|
|
|
|
printk(KERN_INFO "Configured mcast device: %s:%u-%u\n", init->addr,
|
|
init->lport, init->ttl);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int ucast_setup(char *str, char **mac_out, void *data)
|
|
{
|
|
struct umcast_init *init = data;
|
|
char *lport_str = NULL, *rport_str = NULL, *remain;
|
|
char *last;
|
|
|
|
*init = ((struct umcast_init)
|
|
{ .addr = "",
|
|
.lport = 1102,
|
|
.rport = 1102 });
|
|
|
|
remain = split_if_spec(str, mac_out, &init->addr,
|
|
&lport_str, &rport_str, NULL);
|
|
if (remain != NULL) {
|
|
printk(KERN_ERR "ucast_setup - Extra garbage on "
|
|
"specification : '%s'\n", remain);
|
|
return 0;
|
|
}
|
|
|
|
if (lport_str != NULL) {
|
|
init->lport = simple_strtoul(lport_str, &last, 10);
|
|
if ((*last != '\0') || (last == lport_str)) {
|
|
printk(KERN_ERR "ucast_setup - Bad listen port : "
|
|
"'%s'\n", lport_str);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (rport_str != NULL) {
|
|
init->rport = simple_strtoul(rport_str, &last, 10);
|
|
if ((*last != '\0') || (last == rport_str)) {
|
|
printk(KERN_ERR "ucast_setup - Bad remote port : "
|
|
"'%s'\n", rport_str);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
init->unicast = true;
|
|
|
|
printk(KERN_INFO "Configured ucast device: :%u -> %s:%u\n",
|
|
init->lport, init->addr, init->rport);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static struct transport mcast_transport = {
|
|
.list = LIST_HEAD_INIT(mcast_transport.list),
|
|
.name = "mcast",
|
|
.setup = mcast_setup,
|
|
.user = &umcast_user_info,
|
|
.kern = &umcast_kern_info,
|
|
.private_size = sizeof(struct umcast_data),
|
|
.setup_size = sizeof(struct umcast_init),
|
|
};
|
|
|
|
static struct transport ucast_transport = {
|
|
.list = LIST_HEAD_INIT(ucast_transport.list),
|
|
.name = "ucast",
|
|
.setup = ucast_setup,
|
|
.user = &umcast_user_info,
|
|
.kern = &umcast_kern_info,
|
|
.private_size = sizeof(struct umcast_data),
|
|
.setup_size = sizeof(struct umcast_init),
|
|
};
|
|
|
|
static int register_umcast(void)
|
|
{
|
|
register_transport(&mcast_transport);
|
|
register_transport(&ucast_transport);
|
|
return 0;
|
|
}
|
|
|
|
late_initcall(register_umcast);
|