56d5e0967c
Sponsored by: Nginx, Inc.
170 lines
4.4 KiB
C
170 lines
4.4 KiB
C
/*
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* Copyright (c) 2009 Hiroki Sato. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <err.h>
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#include <errno.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 <unistd.h>
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#include <ifaddrs.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <netinet6/nd6.h>
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#include "ifconfig.h"
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#define MAX_SYSCTL_TRY 5
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#define ND6BITS "\020\001PERFORMNUD\002ACCEPT_RTADV\003PREFER_SOURCE" \
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"\004IFDISABLED\005DONT_SET_IFROUTE\006AUTO_LINKLOCAL" \
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"\007NO_RADR\010NO_PREFER_IFACE\011IGNORELOOP\012NO_DAD" \
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"\020DEFAULTIF"
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static int isnd6defif(int);
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void setnd6flags(const char *, int, int, const struct afswtch *);
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void setnd6defif(const char *, int, int, const struct afswtch *);
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void nd6_status(int);
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void
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setnd6flags(const char *dummyaddr __unused,
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int d, int s,
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const struct afswtch *afp)
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{
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struct in6_ndireq nd;
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int error;
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memset(&nd, 0, sizeof(nd));
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strncpy(nd.ifname, ifr.ifr_name, sizeof(nd.ifname));
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error = ioctl(s, SIOCGIFINFO_IN6, &nd);
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if (error) {
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warn("ioctl(SIOCGIFINFO_IN6)");
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return;
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}
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if (d < 0)
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nd.ndi.flags &= ~(-d);
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else
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nd.ndi.flags |= d;
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error = ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd);
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if (error)
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warn("ioctl(SIOCSIFINFO_IN6)");
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}
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void
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setnd6defif(const char *dummyaddr __unused,
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int d, int s,
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const struct afswtch *afp)
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{
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struct in6_ndifreq ndifreq;
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int ifindex;
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int error;
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memset(&ndifreq, 0, sizeof(ndifreq));
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strncpy(ndifreq.ifname, ifr.ifr_name, sizeof(ndifreq.ifname));
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if (d < 0) {
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if (isnd6defif(s)) {
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/* ifindex = 0 means to remove default if */
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ifindex = 0;
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} else
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return;
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} else if ((ifindex = if_nametoindex(ndifreq.ifname)) == 0) {
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warn("if_nametoindex(%s)", ndifreq.ifname);
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return;
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}
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ndifreq.ifindex = ifindex;
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error = ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq);
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if (error)
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warn("ioctl(SIOCSDEFIFACE_IN6)");
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}
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static int
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isnd6defif(int s)
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{
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struct in6_ndifreq ndifreq;
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unsigned int ifindex;
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int error;
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memset(&ndifreq, 0, sizeof(ndifreq));
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strncpy(ndifreq.ifname, ifr.ifr_name, sizeof(ndifreq.ifname));
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ifindex = if_nametoindex(ndifreq.ifname);
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error = ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq);
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if (error) {
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warn("ioctl(SIOCGDEFIFACE_IN6)");
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return (error);
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}
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return (ndifreq.ifindex == ifindex);
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}
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void
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nd6_status(int s)
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{
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struct in6_ndireq nd;
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int s6;
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int error;
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int isdefif;
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memset(&nd, 0, sizeof(nd));
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strncpy(nd.ifname, ifr.ifr_name, sizeof(nd.ifname));
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if ((s6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
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if (errno != EAFNOSUPPORT && errno != EPROTONOSUPPORT)
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warn("socket(AF_INET6, SOCK_DGRAM)");
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return;
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}
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error = ioctl(s6, SIOCGIFINFO_IN6, &nd);
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if (error) {
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if (errno != EPFNOSUPPORT)
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warn("ioctl(SIOCGIFINFO_IN6)");
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close(s6);
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return;
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}
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isdefif = isnd6defif(s6);
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close(s6);
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if (nd.ndi.flags == 0 && !isdefif)
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return;
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printb("\tnd6 options",
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(unsigned int)(nd.ndi.flags | (isdefif << 15)), ND6BITS);
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putchar('\n');
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}
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