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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2018 Intel Corporation
*/
#include <netinet/in.h>
#ifdef RTE_EXEC_ENV_LINUXAPP
#include <linux/if.h>
#include <linux/if_tun.h>
#endif
#include <sys/ioctl.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <rte_string_fns.h>
#include "rte_eth_softnic_internals.h"
#define TAP_DEV "/dev/net/tun"
int
softnic_tap_init(struct pmd_internals *p)
{
TAILQ_INIT(&p->tap_list);
return 0;
}
void
softnic_tap_free(struct pmd_internals *p)
{
for ( ; ; ) {
struct softnic_tap *tap;
tap = TAILQ_FIRST(&p->tap_list);
if (tap == NULL)
break;
TAILQ_REMOVE(&p->tap_list, tap, node);
free(tap);
}
}
struct softnic_tap *
softnic_tap_find(struct pmd_internals *p,
const char *name)
{
struct softnic_tap *tap;
if (name == NULL)
return NULL;
TAILQ_FOREACH(tap, &p->tap_list, node)
if (strcmp(tap->name, name) == 0)
return tap;
return NULL;
}
#ifndef RTE_EXEC_ENV_LINUXAPP
struct softnic_tap *
softnic_tap_create(struct pmd_internals *p __rte_unused,
const char *name __rte_unused)
{
return NULL;
}
#else
struct softnic_tap *
softnic_tap_create(struct pmd_internals *p,
const char *name)
{
struct softnic_tap *tap;
struct ifreq ifr;
int fd, status;
/* Check input params */
if (name == NULL ||
softnic_tap_find(p, name))
return NULL;
/* Resource create */
fd = open(TAP_DEV, O_RDWR | O_NONBLOCK);
if (fd < 0)
return NULL;
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TAP | IFF_NO_PI; /* No packet information */
snprintf(ifr.ifr_name, IFNAMSIZ, "%s", name);
status = ioctl(fd, TUNSETIFF, (void *)&ifr);
if (status < 0) {
close(fd);
return NULL;
}
/* Node allocation */
tap = calloc(1, sizeof(struct softnic_tap));
if (tap == NULL) {
close(fd);
return NULL;
}
/* Node fill in */
strlcpy(tap->name, name, sizeof(tap->name));
tap->fd = fd;
/* Node add to list */
TAILQ_INSERT_TAIL(&p->tap_list, tap, node);
return tap;
}
#endif
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