1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2009 Hiroki Sato. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #ifndef lint 29 static const char rcsid[] = 30 "$FreeBSD$"; 31 #endif /* not lint */ 32 33 #include <sys/param.h> 34 #include <sys/ioctl.h> 35 #include <sys/socket.h> 36 #include <sys/sysctl.h> 37 #include <net/if.h> 38 #include <net/route.h> 39 40 #include <err.h> 41 #include <errno.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <unistd.h> 46 #include <ifaddrs.h> 47 48 #include <arpa/inet.h> 49 50 #include <netinet/in.h> 51 #include <netinet/in_var.h> 52 #include <arpa/inet.h> 53 #include <netdb.h> 54 55 #include <netinet6/nd6.h> 56 57 #include "ifconfig.h" 58 59 #define MAX_SYSCTL_TRY 5 60 #define ND6BITS "\020\001PERFORMNUD\002ACCEPT_RTADV\003PREFER_SOURCE" \ 61 "\004IFDISABLED\005DONT_SET_IFROUTE\006AUTO_LINKLOCAL" \ 62 "\007NO_RADR\010NO_PREFER_IFACE\011NO_DAD\020DEFAULTIF" 63 64 static int isnd6defif(int); 65 void setnd6flags(const char *, int, int, const struct afswtch *); 66 void setnd6defif(const char *, int, int, const struct afswtch *); 67 void nd6_status(int); 68 69 void 70 setnd6flags(const char *dummyaddr __unused, 71 int d, int s, 72 const struct afswtch *afp) 73 { 74 struct in6_ndireq nd; 75 int error; 76 77 memset(&nd, 0, sizeof(nd)); 78 strlcpy(nd.ifname, ifr.ifr_name, sizeof(nd.ifname)); 79 error = ioctl(s, SIOCGIFINFO_IN6, &nd); 80 if (error) { 81 warn("ioctl(SIOCGIFINFO_IN6)"); 82 return; 83 } 84 if (d < 0) 85 nd.ndi.flags &= ~(-d); 86 else 87 nd.ndi.flags |= d; 88 error = ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd); 89 if (error) 90 warn("ioctl(SIOCSIFINFO_IN6)"); 91 } 92 93 void 94 setnd6defif(const char *dummyaddr __unused, 95 int d, int s, 96 const struct afswtch *afp) 97 { 98 struct in6_ndifreq ndifreq; 99 int ifindex; 100 int error; 101 102 memset(&ndifreq, 0, sizeof(ndifreq)); 103 strlcpy(ndifreq.ifname, ifr.ifr_name, sizeof(ndifreq.ifname)); 104 105 if (d < 0) { 106 if (isnd6defif(s)) { 107 /* ifindex = 0 means to remove default if */ 108 ifindex = 0; 109 } else 110 return; 111 } else if ((ifindex = if_nametoindex(ndifreq.ifname)) == 0) { 112 warn("if_nametoindex(%s)", ndifreq.ifname); 113 return; 114 } 115 116 ndifreq.ifindex = ifindex; 117 error = ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq); 118 if (error) 119 warn("ioctl(SIOCSDEFIFACE_IN6)"); 120 } 121 122 static int 123 isnd6defif(int s) 124 { 125 struct in6_ndifreq ndifreq; 126 unsigned int ifindex; 127 int error; 128 129 memset(&ndifreq, 0, sizeof(ndifreq)); 130 strlcpy(ndifreq.ifname, ifr.ifr_name, sizeof(ndifreq.ifname)); 131 132 ifindex = if_nametoindex(ndifreq.ifname); 133 error = ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq); 134 if (error) { 135 warn("ioctl(SIOCGDEFIFACE_IN6)"); 136 return (error); 137 } 138 return (ndifreq.ifindex == ifindex); 139 } 140 141 void 142 nd6_status(int s) 143 { 144 struct in6_ndireq nd; 145 int s6; 146 int error; 147 int isdefif; 148 149 memset(&nd, 0, sizeof(nd)); 150 strlcpy(nd.ifname, ifr.ifr_name, sizeof(nd.ifname)); 151 if ((s6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 152 if (errno != EAFNOSUPPORT && errno != EPROTONOSUPPORT) 153 warn("socket(AF_INET6, SOCK_DGRAM)"); 154 return; 155 } 156 error = ioctl(s6, SIOCGIFINFO_IN6, &nd); 157 if (error) { 158 if (errno != EPFNOSUPPORT) 159 warn("ioctl(SIOCGIFINFO_IN6)"); 160 close(s6); 161 return; 162 } 163 isdefif = isnd6defif(s6); 164 close(s6); 165 if (nd.ndi.flags == 0 && !isdefif) 166 return; 167 printb("\tnd6 options", 168 (unsigned int)(nd.ndi.flags | (isdefif << 15)), ND6BITS); 169 putchar('\n'); 170 } 171