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/nd6.h> 54 55 #include "ifconfig.h" 56 57 #define MAX_SYSCTL_TRY 5 58 #define ND6BITS "\020\001PERFORMNUD\002ACCEPT_RTADV\003PREFER_SOURCE" \ 59 "\004IFDISABLED\005DONT_SET_IFROUTE\006AUTO_LINKLOCAL" \ 60 "\007NO_RADR\010NO_PREFER_IFACE\011IGNORELOOP\012NO_DAD" \ 61 "\020DEFAULTIF" 62 63 static int isnd6defif(int); 64 void setnd6flags(const char *, int, int, const struct afswtch *); 65 void setnd6defif(const char *, int, int, const struct afswtch *); 66 void nd6_status(int); 67 68 void 69 setnd6flags(const char *dummyaddr __unused, 70 int d, int s, 71 const struct afswtch *afp) 72 { 73 struct in6_ndireq nd; 74 int error; 75 76 memset(&nd, 0, sizeof(nd)); 77 strncpy(nd.ifname, ifr.ifr_name, sizeof(nd.ifname)); 78 error = ioctl(s, SIOCGIFINFO_IN6, &nd); 79 if (error) { 80 warn("ioctl(SIOCGIFINFO_IN6)"); 81 return; 82 } 83 if (d < 0) 84 nd.ndi.flags &= ~(-d); 85 else 86 nd.ndi.flags |= d; 87 error = ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd); 88 if (error) 89 warn("ioctl(SIOCSIFINFO_IN6)"); 90 } 91 92 void 93 setnd6defif(const char *dummyaddr __unused, 94 int d, int s, 95 const struct afswtch *afp) 96 { 97 struct in6_ndifreq ndifreq; 98 int ifindex; 99 int error; 100 101 memset(&ndifreq, 0, sizeof(ndifreq)); 102 strncpy(ndifreq.ifname, ifr.ifr_name, sizeof(ndifreq.ifname)); 103 104 if (d < 0) { 105 if (isnd6defif(s)) { 106 /* ifindex = 0 means to remove default if */ 107 ifindex = 0; 108 } else 109 return; 110 } else if ((ifindex = if_nametoindex(ndifreq.ifname)) == 0) { 111 warn("if_nametoindex(%s)", ndifreq.ifname); 112 return; 113 } 114 115 ndifreq.ifindex = ifindex; 116 error = ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq); 117 if (error) 118 warn("ioctl(SIOCSDEFIFACE_IN6)"); 119 } 120 121 static int 122 isnd6defif(int s) 123 { 124 struct in6_ndifreq ndifreq; 125 unsigned int ifindex; 126 int error; 127 128 memset(&ndifreq, 0, sizeof(ndifreq)); 129 strncpy(ndifreq.ifname, ifr.ifr_name, sizeof(ndifreq.ifname)); 130 131 ifindex = if_nametoindex(ndifreq.ifname); 132 error = ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq); 133 if (error) { 134 warn("ioctl(SIOCGDEFIFACE_IN6)"); 135 return (error); 136 } 137 return (ndifreq.ifindex == ifindex); 138 } 139 140 void 141 nd6_status(int s) 142 { 143 struct in6_ndireq nd; 144 int s6; 145 int error; 146 int isdefif; 147 148 memset(&nd, 0, sizeof(nd)); 149 strncpy(nd.ifname, ifr.ifr_name, sizeof(nd.ifname)); 150 if ((s6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 151 if (errno != EAFNOSUPPORT && errno != EPROTONOSUPPORT) 152 warn("socket(AF_INET6, SOCK_DGRAM)"); 153 return; 154 } 155 error = ioctl(s6, SIOCGIFINFO_IN6, &nd); 156 if (error) { 157 if (errno != EPFNOSUPPORT) 158 warn("ioctl(SIOCGIFINFO_IN6)"); 159 close(s6); 160 return; 161 } 162 isdefif = isnd6defif(s6); 163 close(s6); 164 if (nd.ndi.flags == 0 && !isdefif) 165 return; 166 printb("\tnd6 options", 167 (unsigned int)(nd.ndi.flags | (isdefif << 15)), ND6BITS); 168 putchar('\n'); 169 } 170