1 /* 2 * Copyright (c) 2009 Hiroki Sato. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26 #ifndef lint 27 static const char rcsid[] = 28 "$FreeBSD$"; 29 #endif /* not lint */ 30 31 #include <sys/param.h> 32 #include <sys/ioctl.h> 33 #include <sys/socket.h> 34 #include <sys/sysctl.h> 35 #include <net/if.h> 36 #include <net/route.h> 37 38 #include <err.h> 39 #include <errno.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <unistd.h> 44 #include <ifaddrs.h> 45 46 #include <arpa/inet.h> 47 48 #include <netinet/in.h> 49 #include <netinet/in_var.h> 50 #include <arpa/inet.h> 51 #include <netdb.h> 52 53 #include <netinet6/in6_var.h> 54 #include <netinet6/nd6.h> 55 56 #include "ifconfig.h" 57 58 #define MAX_SYSCTL_TRY 5 59 #define ND6BITS "\020\001PERFORMNUD\002ACCEPT_RTADV\003PREFER_SOURCE" \ 60 "\004IFDISABLED\005DONT_SET_IFROUTE\006AUTO_LINKLOCAL" \ 61 "\007NO_RADR\010NO_PREFER_IFACE\011IGNORELOOP\012NO_DAD" \ 62 "\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 #ifndef FSTACK 80 error = ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd); 81 #else 82 error = ioctl_va(s, SIOCGIFINFO_IN6, (caddr_t)&nd, 1, AF_INET6); 83 #endif 84 if (error) { 85 warn("ioctl(SIOCGIFINFO_IN6)"); 86 return; 87 } 88 if (d < 0) 89 nd.ndi.flags &= ~(-d); 90 else 91 nd.ndi.flags |= d; 92 93 #ifndef FSTACK 94 error = ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd); 95 #else 96 error = ioctl_va(s, SIOCSIFINFO_IN6, (caddr_t)&nd, 1, AF_INET6); 97 #endif 98 if (error) 99 warn("ioctl(SIOCSIFINFO_IN6)"); 100 } 101 102 void 103 setnd6defif(const char *dummyaddr __unused, 104 int d, int s, 105 const struct afswtch *afp) 106 { 107 struct in6_ndifreq ndifreq; 108 int ifindex; 109 int error; 110 111 memset(&ndifreq, 0, sizeof(ndifreq)); 112 strlcpy(ndifreq.ifname, ifr.ifr_name, sizeof(ndifreq.ifname)); 113 114 if (d < 0) { 115 if (isnd6defif(s)) { 116 /* ifindex = 0 means to remove default if */ 117 ifindex = 0; 118 } else 119 return; 120 } else if ((ifindex = if_nametoindex(ndifreq.ifname)) == 0) { 121 warn("if_nametoindex(%s)", ndifreq.ifname); 122 return; 123 } 124 125 ndifreq.ifindex = ifindex; 126 #ifndef FSTACK 127 error = ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq); 128 #else 129 error = ioctl_va(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq, 1, AF_INET6); 130 #endif 131 if (error) 132 warn("ioctl(SIOCSDEFIFACE_IN6)"); 133 } 134 135 static int 136 isnd6defif(int s) 137 { 138 struct in6_ndifreq ndifreq; 139 unsigned int ifindex; 140 int error; 141 142 memset(&ndifreq, 0, sizeof(ndifreq)); 143 strlcpy(ndifreq.ifname, ifr.ifr_name, sizeof(ndifreq.ifname)); 144 145 ifindex = if_nametoindex(ndifreq.ifname); 146 #ifndef FSTACK 147 error = ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq); 148 #else 149 error = ioctl_va(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq, 1, AF_INET6); 150 #endif 151 if (error) { 152 warn("ioctl(SIOCGDEFIFACE_IN6)"); 153 return (error); 154 } 155 return (ndifreq.ifindex == ifindex); 156 } 157 158 void 159 nd6_status(int s) 160 { 161 struct in6_ndireq nd; 162 int s6; 163 int error; 164 int isdefif; 165 166 memset(&nd, 0, sizeof(nd)); 167 strlcpy(nd.ifname, ifr.ifr_name, sizeof(nd.ifname)); 168 if ((s6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 169 if (errno != EAFNOSUPPORT && errno != EPROTONOSUPPORT) 170 warn("socket(AF_INET6, SOCK_DGRAM)"); 171 return; 172 } 173 174 #ifndef FSTACK 175 error = ioctl(s6, SIOCGIFINFO_IN6, &nd); 176 #else 177 error = ioctl_va(s, SIOCGIFINFO_IN6, (caddr_t)&nd, 1, AF_INET6); 178 #endif 179 if (error) { 180 if (errno != EPFNOSUPPORT) 181 warn("ioctl(SIOCGIFINFO_IN6)"); 182 close(s6); 183 return; 184 } 185 isdefif = isnd6defif(s6); 186 close(s6); 187 if (nd.ndi.flags == 0 && !isdefif) 188 return; 189 printb("\tnd6 options", 190 (unsigned int)(nd.ndi.flags | (isdefif << 15)), ND6BITS); 191 putchar('\n'); 192 } 193