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: stable/9/sbin/ifconfig/af_nd6.c 253062 2013-07-09 07:59:47Z hrs $";
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 <net/if_var.h>
50 #include <netinet/in_var.h>
51 #include <arpa/inet.h>
52 #include <netdb.h>
53
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\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
setnd6flags(const char * dummyaddr __unused,int d,int s,const struct afswtch * afp)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
setnd6defif(const char * dummyaddr __unused,int d,int s,const struct afswtch * afp)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
isnd6defif(int s)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
nd6_status(int s)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