/**
* @file
*
* @ingroup rtems_bsd_rtems
*
* @brief Interface support routines
*/
/*
* Copyright (c) 2021. Chris Johns <chrisj@rtems.org> All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <ifaddrs.h>
#include <net/if_dl.h>
#include <rtems/bsd/iface.h>
#if !defined(RTEMS_BSD_IFACE_TRACE)
#define RTEMS_BSD_IFACE_TRACE 0
#endif
int
rtems_bsd_iface_get(const char *name, struct rtems_bsd_iface *iface)
{
struct ifaddrs *ifap, *ifa;
bool found = false;
if (iface == NULL) {
errno = EINVAL;
return -1;
}
memset(iface, 0, sizeof(*iface));
if (getifaddrs(&ifap) != 0) {
if (RTEMS_BSD_IFACE_TRACE) {
printf("bsd: iface: getifaddrs failed: %s\n", strerror(errno));
}
return -1;
}
for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
if ((ifa->ifa_flags & IFF_LOOPBACK) ||
(ifa->ifa_flags & IFF_POINTOPOINT))
continue;
if (strcmp(name, ifa->ifa_name) != 0)
continue;
found = true;
if (ifa->ifa_addr->sa_family == AF_LINK) {
struct sockaddr_dl *sa;
sa = (struct sockaddr_dl *)ifa->ifa_addr;
iface->unit = sa->sdl_index;
iface->hw_len = sa->sdl_alen;
memcpy(iface->hw_address, LLADDR(sa), sa->sdl_alen);
} else if (ifa->ifa_addr->sa_family == AF_INET) {
struct sockaddr_in sa;
memcpy(&sa, ifa->ifa_addr, sizeof(sa));
if (sa.sin_addr.s_addr == htonl(INADDR_LOOPBACK))
continue;
strlcpy(iface->ifr.ifr_name, ifa->ifa_name, IFNAMSIZ);
memcpy(&iface->ifr.ifr_addr, ifa->ifa_addr,
ifa->ifa_addr->sa_len);
iface->address = sa.sin_addr;
}
}
freeifaddrs(ifap);
if (!found) {
if (RTEMS_BSD_IFACE_TRACE) {
printf("bsd: iface: not-found: %s\n", name);
}
errno = ENOENT;
return -1;
}
strlcpy(iface->name, name, sizeof(iface->name));
return 0;
}
int
rtems_bsd_iface_link_state(const char *name, bool *state)
{
struct rtems_bsd_iface iface;
struct ifmediareq ifmr = {0};
int s;
int rc;
*state = false;
rc = rtems_bsd_iface_get(name, &iface);
if (rc < 0) {
return -1;
}
s = socket(iface.ifr.ifr_addr.sa_family, SOCK_DGRAM, 0);
if (s < 0) {
if (RTEMS_BSD_IFACE_TRACE) {
printf("bsd: iface: link state: socket open failed: %s\n", strerror(errno));
}
return -1;
}
strlcpy(ifmr.ifm_name, name, sizeof(ifmr.ifm_name));
rc = ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr);
close(s);
if (rc < 0) {
if (RTEMS_BSD_IFACE_TRACE) {
printf("bsd: iface: link state: socket ioctl failed: %s\n", strerror(errno));
}
return -1;
}
if ((ifmr.ifm_status & IFM_AVALID) != 0) {
*state = (ifmr.ifm_status & IFM_ACTIVE) != 0;
}
return 0;
}
