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* Copyright (c) 2018 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
*
* Routines setting up the host system. Those are placed in separate file
* because there is naming conflicts between host and zephyr network stacks.
*/
/* Host include files */
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <errno.h>
#include <string.h>
#include <stdbool.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <net/if.h>
#include <time.h>
#include "posix_trace.h"
#ifdef __linux
#include <linux/if_tun.h>
#endif
/* Zephyr include files. Be very careful here and only include minimum
* things needed.
*/
#define LOG_MODULE_NAME eth_posix_adapt
#define LOG_LEVEL CONFIG_ETHERNET_LOG_LEVEL
#include <logging/log.h>
LOG_MODULE_REGISTER(LOG_MODULE_NAME);
#include <zephyr/types.h>
#include <sys_clock.h>
#if defined(CONFIG_NET_GPTP)
#include <net/gptp.h>
#endif
#include "eth_native_posix_priv.h"
/* Note that we cannot create the TUN/TAP device from the setup script
* as we need to get a file descriptor to communicate with the interface.
*/
int eth_iface_create(const char *if_name, bool tun_only)
{
struct ifreq ifr;
int fd, ret = -EINVAL;
fd = open(ETH_NATIVE_POSIX_DEV_NAME, O_RDWR);
if (fd < 0) {
return -errno;
}
(void)memset(&ifr, 0, sizeof(ifr));
#ifdef __linux
ifr.ifr_flags = (tun_only ? IFF_TUN : IFF_TAP) | IFF_NO_PI;
strncpy(ifr.ifr_name, if_name, IFNAMSIZ - 1);
ret = ioctl(fd, TUNSETIFF, (void *)&ifr);
if (ret < 0) {
ret = -errno;
close(fd);
return ret;
}
#endif
return fd;
}
int eth_iface_remove(int fd)
{
return close(fd);
}
static int ssystem(const char *fmt, ...)
__attribute__((__format__(__printf__, 1, 2)));
static int ssystem(const char *fmt, ...)
{
char cmd[255];
va_list ap;
int ret;
va_start(ap, fmt);
vsnprintf(cmd, sizeof(cmd), fmt, ap);
va_end(ap);
posix_print_trace("%s\n", cmd);
ret = system(cmd);
return -WEXITSTATUS(ret);
}
int eth_setup_host(const char *if_name)
{
if (!IS_ENABLED(CONFIG_ETH_NATIVE_POSIX_STARTUP_AUTOMATIC)) {
return 0;
}
/* User might have added -i option to setup script string, so
* check that situation in the script itself so that the -i option
* we add here is ignored in that case.
*/
return ssystem("%s -i %s", ETH_NATIVE_POSIX_SETUP_SCRIPT,
if_name);
}
int eth_start_script(const char *if_name)
{
if (!IS_ENABLED(CONFIG_ETH_NATIVE_POSIX_STARTUP_AUTOMATIC)) {
return 0;
}
if (ETH_NATIVE_POSIX_STARTUP_SCRIPT[0] == '\0') {
return 0;
}
if (ETH_NATIVE_POSIX_STARTUP_SCRIPT_USER[0] == '\0') {
return ssystem("%s %s", ETH_NATIVE_POSIX_STARTUP_SCRIPT,
if_name);
} else {
return ssystem("sudo -u %s %s %s",
ETH_NATIVE_POSIX_STARTUP_SCRIPT_USER,
ETH_NATIVE_POSIX_STARTUP_SCRIPT,
if_name);
}
}
int eth_wait_data(int fd)
{
struct timeval timeout;
fd_set rset;
int ret;
FD_ZERO(&rset);
FD_SET(fd, &rset);
timeout.tv_sec = 0;
timeout.tv_usec = 0;
ret = select(fd + 1, &rset, NULL, NULL, &timeout);
if (ret < 0 && errno != EINTR) {
return -errno;
} else if (ret > 0) {
if (FD_ISSET(fd, &rset)) {
return 0;
}
}
return -EAGAIN;
}
ssize_t eth_read_data(int fd, void *buf, size_t buf_len)
{
return read(fd, buf, buf_len);
}
ssize_t eth_write_data(int fd, void *buf, size_t buf_len)
{
return write(fd, buf, buf_len);
}
#if defined(CONFIG_NET_GPTP)
int eth_clock_gettime(struct net_ptp_time *time)
{
struct timespec tp;
int ret;
ret = clock_gettime(CLOCK_MONOTONIC_RAW, &tp);
if (ret < 0) {
return -errno;
}
time->second = tp.tv_sec;
time->nanosecond = tp.tv_nsec;
return 0;
}
#endif /* CONFIG_NET_GPTP */
#if defined(CONFIG_NET_PROMISCUOUS_MODE)
int eth_promisc_mode(const char *if_name, bool enable)
{
if (!IS_ENABLED(CONFIG_ETH_NATIVE_POSIX_STARTUP_AUTOMATIC)) {
return 0;
}
return ssystem("ip link set dev %s promisc %s",
if_name, enable ? "on" : "off");
}
#endif /* CONFIG_NET_PROMISCUOUS_MODE */
/* If we have enabled manual setup, then interface cannot be
* taken up or down by the driver as we normally do not have
* enough permissions.
*/
int eth_if_up(const char *if_name)
{
if (!IS_ENABLED(CONFIG_ETH_NATIVE_POSIX_STARTUP_AUTOMATIC)) {
return 0;
}
return ssystem("ip link set dev %s up", if_name);
}
int eth_if_down(const char *if_name)
{
if (!IS_ENABLED(CONFIG_ETH_NATIVE_POSIX_STARTUP_AUTOMATIC)) {
return 0;
}
return ssystem("ip link set dev %s down", if_name);
}
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