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#include <machine/rtems-bsd-user-space.h>
/*
* Copyright (c) 2009 Hiroki Sato. 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 REGENTS 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 REGENTS 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.
*/
#ifndef lint
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <rtems/bsd/sys/param.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/route.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ifaddrs.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <net/if_var.h>
#include <netinet/in_var.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <netinet6/nd6.h>
#include "ifconfig.h"
#define MAX_SYSCTL_TRY 5
#define ND6BITS "\020\001PERFORMNUD\002ACCEPT_RTADV\003PREFER_SOURCE" \
"\004IFDISABLED\005DONT_SET_IFROUTE\006AUTO_LINKLOCAL" \
"\020DEFAULTIF"
static int isnd6defif(int);
void setnd6flags(const char *, int, int, const struct afswtch *);
void setnd6defif(const char *, int, int, const struct afswtch *);
void
setnd6flags(const char *dummyaddr __unused,
int d, int s,
const struct afswtch *afp)
{
struct in6_ndireq nd;
int error;
memset(&nd, 0, sizeof(nd));
strncpy(nd.ifname, ifr.ifr_name, sizeof(nd.ifname));
error = ioctl(s, SIOCGIFINFO_IN6, &nd);
if (error) {
warn("ioctl(SIOCGIFINFO_IN6)");
return;
}
if (d < 0)
nd.ndi.flags &= ~(-d);
else
nd.ndi.flags |= d;
error = ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd);
if (error)
warn("ioctl(SIOCSIFINFO_IN6)");
}
void
setnd6defif(const char *dummyaddr __unused,
int d, int s,
const struct afswtch *afp)
{
struct in6_ndifreq ndifreq;
int ifindex;
int error;
memset(&ndifreq, 0, sizeof(ndifreq));
strncpy(ndifreq.ifname, ifr.ifr_name, sizeof(ndifreq.ifname));
if (d < 0) {
if (isnd6defif(s)) {
/* ifindex = 0 means to remove default if */
ifindex = 0;
} else
return;
} else if ((ifindex = if_nametoindex(ndifreq.ifname)) == 0) {
warn("if_nametoindex(%s)", ndifreq.ifname);
return;
}
ndifreq.ifindex = ifindex;
error = ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq);
if (error)
warn("ioctl(SIOCSDEFIFACE_IN6)");
}
static int
isnd6defif(int s)
{
struct in6_ndifreq ndifreq;
unsigned int ifindex;
int error;
memset(&ndifreq, 0, sizeof(ndifreq));
strncpy(ndifreq.ifname, ifr.ifr_name, sizeof(ndifreq.ifname));
ifindex = if_nametoindex(ndifreq.ifname);
error = ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq);
if (error) {
warn("ioctl(SIOCGDEFIFACE_IN6)");
return (error);
}
return (ndifreq.ifindex == ifindex);
}
static void
nd6_status(int s)
{
struct in6_ndireq nd;
struct rt_msghdr *rtm;
size_t needed;
char *buf, *next;
int mib[6], ntry;
int s6;
int error;
int isinet6, isdefif;
/* Check if the interface has at least one IPv6 address. */
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0;
mib[3] = AF_INET6;
mib[4] = NET_RT_IFLIST;
mib[5] = if_nametoindex(ifr.ifr_name);
/* Try to prevent a race between two sysctls. */
ntry = 0;
do {
error = sysctl(mib, 6, NULL, &needed, NULL, 0);
if (error) {
warn("sysctl(NET_RT_IFLIST)/estimate");
return;
}
buf = malloc(needed);
if (buf == NULL) {
warn("malloc for sysctl(NET_RT_IFLIST) failed");
return;
}
if ((error = sysctl(mib, 6, buf, &needed, NULL, 0)) < 0) {
if (errno != ENOMEM || ++ntry >= MAX_SYSCTL_TRY) {
warn("sysctl(NET_RT_IFLIST)/get");
free(buf);
return;
}
free(buf);
buf = NULL;
}
} while (buf == NULL);
isinet6 = 0;
for (next = buf; next < buf + needed; next += rtm->rtm_msglen) {
rtm = (struct rt_msghdr *)next;
if (rtm->rtm_version != RTM_VERSION)
continue;
if (rtm->rtm_type == RTM_NEWADDR) {
isinet6 = 1;
break;
}
}
free(buf);
if (!isinet6)
return;
memset(&nd, 0, sizeof(nd));
strncpy(nd.ifname, ifr.ifr_name, sizeof(nd.ifname));
if ((s6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
warn("socket(AF_INET6, SOCK_DGRAM)");
return;
}
error = ioctl(s6, SIOCGIFINFO_IN6, &nd);
if (error) {
warn("ioctl(SIOCGIFINFO_IN6)");
close(s6);
return;
}
isdefif = isnd6defif(s6);
close(s6);
if (nd.ndi.flags == 0 && !isdefif)
return;
printb("\tnd6 options",
(unsigned int)(nd.ndi.flags | (isdefif << 15)), ND6BITS);
putchar('\n');
}
static struct afswtch af_nd6 = {
.af_name = "nd6",
.af_af = AF_LOCAL,
.af_other_status= nd6_status,
};
#ifndef __rtems__
static __constructor void
#else /* __rtems__ */
void
#endif /* __rtems__ */
nd6_ctor(void)
{
af_register(&af_nd6);
}
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