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netdev: rudimentary getinfo ioctl

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Matheus
2026-04-01 17:00:16 -03:00
parent 4e8f925156
commit 13a2bd4c6c
1 changed files with 64 additions and 2 deletions
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kernel-src/io/net/netdev.c
+64 -2
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@@ -4,23 +4,85 @@
#include <mutex.h>
#include <string.h>
#include <logging.h>
#include <kernel/usercopy.h>
#include <kernel/sock.h>
static int current_minor;
static netdev_t *minors[64];
HASHTABLE_DEFINE_STATIC(nametable, 10);
static MUTEX_DEFINE(tablelock);
static devops_t devops = {0};
typedef struct {
abisockaddr_t addr;
abisockaddr_t broadaddr;
abisockaddr_t netmask;
abisockaddr_t hwaddr;
short flags;
int mtu;
} net_info_t;
static int netdev_ioctl(int minor, unsigned long request, void *arg, int *result, cred_t *cred) {
netdev_t *netdev = minors[minor];
if (netdev == NULL)
return ENODEV;
switch (request) {
case 0x1337631: {
net_info_t *info = arg;
sockaddr_t addr = {0};
abisockaddr_t abisockaddr;
short flags = netdev->flags;
int mtu = netdev->mtu;
addr.ipv4addr.addr = netdev->ip;
sock_addrtoabiaddr(SOCKET_TYPE_UDP, &addr, &abisockaddr);
int error = USERCOPY_POSSIBLY_TO_USER(&info->addr, &abisockaddr, sizeof(abisockaddr));
if (error)
return error;
error = USERCOPY_POSSIBLY_TO_USER(&info->hwaddr, &netdev->mac, sizeof(netdev->mac));
if (error)
return error;
error = USERCOPY_POSSIBLY_TO_USER(&info->mtu, &mtu, sizeof(mtu));
if (error)
return error;
error = USERCOPY_POSSIBLY_TO_USER(&info->flags, &flags, sizeof(flags));
if (error)
return error;
// TODO broadaddr
// TODO netmask
break;
}
default:
return ENOTTY;
}
return 0;
}
static devops_t devops = {
.ioctl = netdev_ioctl
};
int netdev_register(netdev_t *netdev, char *name) {
int minor = __atomic_fetch_add(&current_minor, 1, __ATOMIC_RELAXED);
MUTEX_ACQUIRE(&tablelock);
int e = hashtable_set(&nametable, netdev, name, strlen(name), true);
if (e)
goto leave;
e = devfs_register(&devops, name, V_TYPE_CHDEV, DEV_MAJOR_NET, 0, 0600, NULL);
e = devfs_register(&devops, name, V_TYPE_CHDEV, DEV_MAJOR_NET, minor, 0600, NULL);
if (e)
hashtable_remove(&nametable, name, strlen(name));
minors[minor] = netdev;
leave:
MUTEX_RELEASE(&tablelock);
return e;