umka/vnet/null.c

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/*
SPDX-License-Identifier: GPL-2.0-or-later
UMKa - User-Mode KolibriOS developer tools
vnet - virtual network card, null interface
Copyright (C) 2023 Ivan Baravy <dunkaist@gmail.com>
*/
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "trace.h"
#include "umka.h"
#include "vnet.h"
static STDCALL void
vnet_unload_null(void) {
COVERAGE_ON();
COVERAGE_OFF();
}
static STDCALL void
vnet_reset_null(void) {
COVERAGE_ON();
COVERAGE_OFF();
}
/*
static void
dump_net_buff(net_buff_t *buf) {
for (size_t i = 0; i < buf->length; i++) {
printf("%2.2x ", buf->data[i]);
}
putchar('\n');
}
*/
static STDCALL int
vnet_transmit_null(net_buff_t *buf) {
struct vnet *net;
__asm__ __inline__ __volatile__ (
""
: "=b"(net)
:
: "memory");
// dump_net_buff(buf);
buf->length = 0;
COVERAGE_OFF();
COVERAGE_ON();
return 0;
}
struct vnet *
vnet_init_null(void) {
struct vnet *vnet = malloc(sizeof(struct vnet));
vnet->eth.net.device_type = NET_TYPE_ETH;
vnet->eth.net.mtu = 1514;
char *devname = malloc(8);
sprintf(devname, "UMKNUL%d", 0); // FIXME: support more devices
vnet->eth.net.name = devname;
vnet->eth.net.unload = vnet_unload_null;
vnet->eth.net.reset = vnet_reset_null;
vnet->eth.net.transmit = vnet_transmit_null;
vnet->fdin = 0;
vnet->fdout = 0;
vnet->input_processed = 1;
memcpy(vnet->eth.mac, (uint8_t[]){0x80, 0x2b, 0xf9, 0x3b, 0x6c, 0xca},
sizeof(vnet->eth.mac));
return vnet;
}