136 lines
3.6 KiB
C
136 lines
3.6 KiB
C
/*
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SPDX-License-Identifier: GPL-2.0-or-later
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UMKa - User-Mode KolibriOS developer tools
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vnet - virtual network card
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Copyright (C) 2020-2023 Ivan Baravy <dunkaist@gmail.com>
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Copyright (C) 2021 Magomed Kostoev <mkostoevr@yandex.ru>
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*/
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#include <assert.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <pthread.h>
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#include <signal.h>
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#include <stdatomic.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "umka.h"
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#include "trace.h"
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#include "vnet.h"
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#include "vnet/tap.h"
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#include "vnet/file.h"
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#ifndef _WIN32
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#include <unistd.h>
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#else
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#include <io.h>
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#endif
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#define STACK_SIZE 0x10000
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static int
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vnet_input(void *udata) {
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umka_sti();
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int plen = 0;
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struct vnet *vnet = udata;
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// fprintf(stderr, "[vnet] input interrupt\n");
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net_buff_t *buf = kos_net_buff_alloc(NET_BUFFER_SIZE);
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if (!buf) {
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fprintf(stderr, "[vnet] Can't allocate network buffer!\n");
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return 1;
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}
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buf->device = &vnet->eth.net;
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/*
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plen = read(fd, buf->data, NET_BUFFER_SIZE - offsetof(net_buff_t, data));
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if (plen == -1) {
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plen = 0; // we have just allocated a buffer, so we have to submit it
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}
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*/
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plen = vnet->bufin_len;
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memcpy(buf->data, vnet->bufin, vnet->bufin_len);
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/*
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fprintf(stderr, "[vnet] read %i bytes\n", plen);
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for (int i = 0; i < plen; i++) {
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fprintf(stderr, " %2.2x", buf->data[i]);
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}
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fprintf(stderr, "\n");
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*/
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buf->length = plen;
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buf->offset = offsetof(net_buff_t, data);
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kos_eth_input(buf);
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vnet->input_processed = 1;
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//fprintf(stderr, "[vnet_input] signal before\n");
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// pthread_cond_signal(&vnet->cond);
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//fprintf(stderr, "[vnet_input] signal after\n");
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return 1; // acknowledge our interrupt
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}
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static void *
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vnet_input_monitor(void *arg) {
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struct vnet *vnet = arg;
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while (1) {
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ssize_t nread = read(vnet->fdin, vnet->bufin, VNET_BUFIN_CAP);
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vnet->input_processed = 0;
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vnet->bufin_len = nread;
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atomic_store_explicit(&umka_irq_number, UMKA_IRQ_NETWORK,
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memory_order_release);
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raise(UMKA_SIGNAL_IRQ); // FIXME: not atomic with the above
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//fprintf(stderr, "[vnet_input_monitor] wait for signal\n");
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// pthread_cond_wait(&vnet->cond, &vnet->mutex); // TODO: handle spurious
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//fprintf(stderr, "[vnet_input_monitor] got signal\n");
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}
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return NULL;
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}
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struct vnet *
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vnet_init(enum vnet_type type) {
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struct vnet *vnet;
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switch (type) {
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case VNET_FILE:
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vnet = vnet_init_file();
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break;
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case VNET_TAP:
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vnet = vnet_init_tap();
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break;
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default:
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fprintf(stderr, "[vnet] bad vnet type: %d\n", type);
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return NULL;
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}
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if (!vnet) {
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fprintf(stderr, "[vnet] device initialization failed\n");
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return NULL;
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}
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vnet->eth.net.link_state = ETH_LINK_FD + ETH_LINK_10M;
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vnet->eth.net.hwacc = 0;
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vnet->eth.net.bytes_tx = 0;
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vnet->eth.net.bytes_rx = 0;
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vnet->eth.net.packets_tx = 0;
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vnet->eth.net.packets_tx_err = 0;
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vnet->eth.net.packets_tx_drop = 0;
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vnet->eth.net.packets_tx_ovr = 0;
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vnet->eth.net.packets_rx = 0;
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vnet->eth.net.packets_rx_err = 0;
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vnet->eth.net.packets_rx_drop = 0;
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vnet->eth.net.packets_rx_ovr = 0;
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// pthread_cond_init(&vnet->cond, NULL);
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// pthread_mutex_init(&vnet->mutex, NULL);
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// pthread_mutex_lock(&vnet->mutex);
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kos_attach_int_handler(UMKA_IRQ_NETWORK, vnet_input, vnet);
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fprintf(stderr, "[vnet] start input_monitor thread\n");
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pthread_t thread_input_monitor;
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pthread_create(&thread_input_monitor, NULL, vnet_input_monitor, vnet);
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return vnet;
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}
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