1 /*
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #ifndef lint
31 static const char rcsid[] =
32 "$FreeBSD$";
33 #endif /* not lint */
34
35 #include <sys/param.h>
36 #include <sys/ioctl.h>
37 #include <sys/socket.h>
38 #include <net/if.h>
39
40 #include <ctype.h>
41 #include <err.h>
42 #include <stdio.h>
43 #include <stdlib.h>
44 #include <string.h>
45 #include <unistd.h>
46 #include <ifaddrs.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 "ifconfig.h"
54
55 static struct in_aliasreq in_addreq;
56 static struct ifreq in_ridreq;
57 static char addr_buf[NI_MAXHOST]; /*for getnameinfo()*/
58 extern char *f_inet, *f_addr;
59
60 static void
in_status(int s __unused,const struct ifaddrs * ifa)61 in_status(int s __unused, const struct ifaddrs *ifa)
62 {
63 struct sockaddr_in *sin, null_sin;
64 int error, n_flags;
65
66 memset(&null_sin, 0, sizeof(null_sin));
67
68 sin = (struct sockaddr_in *)ifa->ifa_addr;
69 if (sin == NULL)
70 return;
71
72 if (f_addr != NULL && strcmp(f_addr, "fqdn") == 0)
73 n_flags = 0;
74 else if (f_addr != NULL && strcmp(f_addr, "host") == 0)
75 n_flags = NI_NOFQDN;
76 else
77 n_flags = NI_NUMERICHOST;
78
79 error = getnameinfo((struct sockaddr *)sin, sin->sin_len, addr_buf,
80 sizeof(addr_buf), NULL, 0, n_flags);
81
82 if (error)
83 inet_ntop(AF_INET, &sin->sin_addr, addr_buf, sizeof(addr_buf));
84
85 printf("\tinet %s", addr_buf);
86
87 if (ifa->ifa_flags & IFF_POINTOPOINT) {
88 sin = (struct sockaddr_in *)ifa->ifa_dstaddr;
89 if (sin == NULL)
90 sin = &null_sin;
91 printf(" --> %s", inet_ntoa(sin->sin_addr));
92 }
93
94 sin = (struct sockaddr_in *)ifa->ifa_netmask;
95 if (sin == NULL)
96 sin = &null_sin;
97 if (f_inet != NULL && strcmp(f_inet, "cidr") == 0) {
98 int cidr = 32;
99 unsigned long smask;
100
101 smask = ntohl(sin->sin_addr.s_addr);
102 while ((smask & 1) == 0) {
103 smask = smask >> 1;
104 cidr--;
105 if (cidr == 0)
106 break;
107 }
108 printf("/%d", cidr);
109 } else if (f_inet != NULL && strcmp(f_inet, "dotted") == 0)
110 printf(" netmask %s", inet_ntoa(sin->sin_addr));
111 else
112 printf(" netmask 0x%lx", (unsigned long)ntohl(sin->sin_addr.s_addr));
113
114 if (ifa->ifa_flags & IFF_BROADCAST) {
115 sin = (struct sockaddr_in *)ifa->ifa_broadaddr;
116 if (sin != NULL && sin->sin_addr.s_addr != 0)
117 printf(" broadcast %s", inet_ntoa(sin->sin_addr));
118 }
119
120 print_vhid(ifa, " ");
121
122 putchar('\n');
123 }
124
125 #define SIN(x) ((struct sockaddr_in *) &(x))
126 static struct sockaddr_in *sintab[] = {
127 SIN(in_ridreq.ifr_addr), SIN(in_addreq.ifra_addr),
128 SIN(in_addreq.ifra_mask), SIN(in_addreq.ifra_broadaddr)
129 };
130
131 static void
in_getaddr(const char * s,int which)132 in_getaddr(const char *s, int which)
133 {
134 struct sockaddr_in *sin = sintab[which];
135 struct hostent *hp;
136 struct netent *np;
137
138 sin->sin_len = sizeof(*sin);
139 sin->sin_family = AF_INET;
140
141 if (which == ADDR) {
142 char *p = NULL;
143
144 if((p = strrchr(s, '/')) != NULL) {
145 const char *errstr;
146 /* address is `name/masklen' */
147 int masklen;
148 struct sockaddr_in *min = sintab[MASK];
149 *p = '\0';
150 if (!isdigit(*(p + 1)))
151 errstr = "invalid";
152 else
153 masklen = (int)strtonum(p + 1, 0, 32, &errstr);
154 if (errstr != NULL) {
155 *p = '/';
156 errx(1, "%s: bad value (width %s)", s, errstr);
157 }
158 min->sin_family = AF_INET;
159 min->sin_len = sizeof(*min);
160 min->sin_addr.s_addr = htonl(~((1LL << (32 - masklen)) - 1) &
161 0xffffffff);
162 }
163 }
164
165 if (inet_aton(s, &sin->sin_addr))
166 return;
167 if ((hp = gethostbyname(s)) != NULL)
168 bcopy(hp->h_addr, (char *)&sin->sin_addr,
169 MIN((size_t)hp->h_length, sizeof(sin->sin_addr)));
170 else if ((np = getnetbyname(s)) != NULL)
171 sin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY);
172 else
173 errx(1, "%s: bad value", s);
174 }
175
176 static void
in_status_tunnel(int s)177 in_status_tunnel(int s)
178 {
179 char src[NI_MAXHOST];
180 char dst[NI_MAXHOST];
181 struct ifreq ifr;
182 const struct sockaddr *sa = (const struct sockaddr *) &ifr.ifr_addr;
183
184 memset(&ifr, 0, sizeof(ifr));
185 strlcpy(ifr.ifr_name, name, IFNAMSIZ);
186
187 if (ioctl(s, SIOCGIFPSRCADDR, (caddr_t)&ifr) < 0)
188 return;
189 if (sa->sa_family != AF_INET)
190 return;
191 if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, NI_NUMERICHOST) != 0)
192 src[0] = '\0';
193
194 if (ioctl(s, SIOCGIFPDSTADDR, (caddr_t)&ifr) < 0)
195 return;
196 if (sa->sa_family != AF_INET)
197 return;
198 if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, NI_NUMERICHOST) != 0)
199 dst[0] = '\0';
200
201 printf("\ttunnel inet %s --> %s\n", src, dst);
202 }
203
204 static void
in_set_tunnel(int s,struct addrinfo * srcres,struct addrinfo * dstres)205 in_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres)
206 {
207 struct in_aliasreq addreq;
208
209 memset(&addreq, 0, sizeof(addreq));
210 strlcpy(addreq.ifra_name, name, IFNAMSIZ);
211 memcpy(&addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len);
212 memcpy(&addreq.ifra_dstaddr, dstres->ai_addr, dstres->ai_addr->sa_len);
213
214 if (ioctl(s, SIOCSIFPHYADDR, &addreq) < 0)
215 warn("SIOCSIFPHYADDR");
216 }
217
218 static struct afswtch af_inet = {
219 .af_name = "inet",
220 .af_af = AF_INET,
221 .af_status = in_status,
222 .af_getaddr = in_getaddr,
223 .af_status_tunnel = in_status_tunnel,
224 .af_settunnel = in_set_tunnel,
225 .af_difaddr = SIOCDIFADDR,
226 .af_aifaddr = SIOCAIFADDR,
227 .af_ridreq = &in_ridreq,
228 .af_addreq = &in_addreq,
229 };
230
231 static __constructor void
inet_ctor(void)232 inet_ctor(void)
233 {
234
235 #ifndef RESCUE
236 if (!feature_present("inet"))
237 return;
238 #endif
239 af_register(&af_inet);
240 }
241