1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1983, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #ifndef lint
33 static const char rcsid[] =
34 "$FreeBSD$";
35 #endif /* not lint */
36
37 #include <sys/param.h>
38 #include <sys/ioctl.h>
39 #include <sys/socket.h>
40 #include <net/if.h>
41
42 #include <ctype.h>
43 #include <err.h>
44 #include <stdio.h>
45 #include <stdlib.h>
46 #include <string.h>
47 #include <unistd.h>
48 #include <ifaddrs.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 "ifconfig.h"
56
57 static struct in_aliasreq in_addreq;
58 static struct ifreq in_ridreq;
59 static char addr_buf[NI_MAXHOST]; /*for getnameinfo()*/
60 extern char *f_inet, *f_addr;
61
62 static void
in_status(int s __unused,const struct ifaddrs * ifa)63 in_status(int s __unused, const struct ifaddrs *ifa)
64 {
65 struct sockaddr_in *sin, null_sin;
66 #ifndef FSTACK
67 int error, n_flags;
68 #endif
69
70 memset(&null_sin, 0, sizeof(null_sin));
71
72 sin = (struct sockaddr_in *)ifa->ifa_addr;
73 if (sin == NULL)
74 return;
75
76 #ifndef FSTACK
77 if (f_addr != NULL && strcmp(f_addr, "fqdn") == 0)
78 n_flags = 0;
79 else if (f_addr != NULL && strcmp(f_addr, "host") == 0)
80 n_flags = NI_NOFQDN;
81 else
82 n_flags = NI_NUMERICHOST;
83
84 error = getnameinfo((struct sockaddr *)sin, sin->sin_len, addr_buf,
85 sizeof(addr_buf), NULL, 0, n_flags);
86
87 if (error)
88 #endif
89 inet_ntop(AF_INET, &sin->sin_addr, addr_buf, sizeof(addr_buf));
90
91 printf("\tinet %s", addr_buf);
92
93 if (ifa->ifa_flags & IFF_POINTOPOINT) {
94 sin = (struct sockaddr_in *)ifa->ifa_dstaddr;
95 if (sin == NULL)
96 sin = &null_sin;
97 printf(" --> %s", inet_ntoa(sin->sin_addr));
98 }
99
100 sin = (struct sockaddr_in *)ifa->ifa_netmask;
101 if (sin == NULL)
102 sin = &null_sin;
103 if (f_inet != NULL && strcmp(f_inet, "cidr") == 0) {
104 int cidr = 32;
105 unsigned long smask;
106
107 smask = ntohl(sin->sin_addr.s_addr);
108 while ((smask & 1) == 0) {
109 smask = smask >> 1;
110 cidr--;
111 if (cidr == 0)
112 break;
113 }
114 printf("/%d", cidr);
115 } else if (f_inet != NULL && strcmp(f_inet, "dotted") == 0)
116 printf(" netmask %s", inet_ntoa(sin->sin_addr));
117 else
118 printf(" netmask 0x%lx", (unsigned long)ntohl(sin->sin_addr.s_addr));
119
120 if (ifa->ifa_flags & IFF_BROADCAST) {
121 sin = (struct sockaddr_in *)ifa->ifa_broadaddr;
122 if (sin != NULL && sin->sin_addr.s_addr != 0)
123 printf(" broadcast %s", inet_ntoa(sin->sin_addr));
124 }
125
126 print_vhid(ifa, " ");
127
128 putchar('\n');
129 }
130
131 #define SIN(x) ((struct sockaddr_in *) &(x))
132 static struct sockaddr_in *sintab[] = {
133 SIN(in_ridreq.ifr_addr), SIN(in_addreq.ifra_addr),
134 SIN(in_addreq.ifra_mask), SIN(in_addreq.ifra_broadaddr)
135 };
136
137 static void
in_getaddr(const char * s,int which)138 in_getaddr(const char *s, int which)
139 {
140 struct sockaddr_in *sin = sintab[which];
141 #ifndef FSTACK
142 struct hostent *hp;
143 struct netent *np;
144 #endif
145
146 sin->sin_len = sizeof(*sin);
147 sin->sin_family = AF_INET;
148
149 if (which == ADDR) {
150 char *p = NULL;
151
152 if((p = strrchr(s, '/')) != NULL) {
153 const char *errstr;
154 /* address is `name/masklen' */
155 int masklen;
156 struct sockaddr_in *min = sintab[MASK];
157 *p = '\0';
158 if (!isdigit(*(p + 1)))
159 errstr = "invalid";
160 else
161 masklen = (int)strtonum(p + 1, 0, 32, &errstr);
162 if (errstr != NULL) {
163 *p = '/';
164 errx(1, "%s: bad value (width %s)", s, errstr);
165 }
166 min->sin_family = AF_INET;
167 min->sin_len = sizeof(*min);
168 min->sin_addr.s_addr = htonl(~((1LL << (32 - masklen)) - 1) &
169 0xffffffff);
170 }
171 }
172
173 if (inet_aton(s, &sin->sin_addr))
174 return;
175 #ifdef FSTACK
176 else
177 errx(1, "%s: bad value", s);
178 #else
179 if ((hp = gethostbyname(s)) != NULL)
180 bcopy(hp->h_addr, (char *)&sin->sin_addr,
181 MIN((size_t)hp->h_length, sizeof(sin->sin_addr)));
182 else if ((np = getnetbyname(s)) != NULL)
183 sin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY);
184 else
185 errx(1, "%s: bad value", s);
186 #endif
187 }
188
189 static void
in_status_tunnel(int s)190 in_status_tunnel(int s)
191 {
192 char src[NI_MAXHOST];
193 char dst[NI_MAXHOST];
194 struct ifreq ifr;
195 const struct sockaddr *sa = (const struct sockaddr *) &ifr.ifr_addr;
196 #ifdef FSTACK
197 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
198 #endif
199
200 memset(&ifr, 0, sizeof(ifr));
201 strlcpy(ifr.ifr_name, name, IFNAMSIZ);
202
203 if (ioctl(s, SIOCGIFPSRCADDR, (caddr_t)&ifr) < 0)
204 return;
205 if (sa->sa_family != AF_INET)
206 return;
207 #ifndef FSTACK
208 if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, NI_NUMERICHOST) != 0)
209 src[0] = '\0';
210 #else
211 if (inet_ntop(AF_INET, &sin->sin_addr, src, sizeof(src)) == NULL)
212 return;
213 #endif
214
215 if (ioctl(s, SIOCGIFPDSTADDR, (caddr_t)&ifr) < 0)
216 return;
217 if (sa->sa_family != AF_INET)
218 return;
219 #ifndef FSTACK
220 if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, NI_NUMERICHOST) != 0)
221 dst[0] = '\0';
222 #else
223 if (inet_ntop(AF_INET, &sin->sin_addr, dst, sizeof(dst)) == NULL)
224 return;
225 #endif
226
227 printf("\ttunnel inet %s --> %s\n", src, dst);
228 }
229
230 static void
in_set_tunnel(int s,struct addrinfo * srcres,struct addrinfo * dstres)231 in_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres)
232 {
233 struct in_aliasreq addreq;
234
235 memset(&addreq, 0, sizeof(addreq));
236 strlcpy(addreq.ifra_name, name, IFNAMSIZ);
237 memcpy(&addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len);
238 memcpy(&addreq.ifra_dstaddr, dstres->ai_addr, dstres->ai_addr->sa_len);
239
240 if (ioctl(s, SIOCSIFPHYADDR, &addreq) < 0)
241 warn("SIOCSIFPHYADDR");
242 }
243
244 static struct afswtch af_inet = {
245 .af_name = "inet",
246 .af_af = AF_INET,
247 .af_status = in_status,
248 .af_getaddr = in_getaddr,
249 .af_status_tunnel = in_status_tunnel,
250 .af_settunnel = in_set_tunnel,
251 .af_difaddr = SIOCDIFADDR,
252 .af_aifaddr = SIOCAIFADDR,
253 .af_ridreq = &in_ridreq,
254 .af_addreq = &in_addreq,
255 };
256
257 static __constructor void
inet_ctor(void)258 inet_ctor(void)
259 {
260 #ifndef FSTACK
261 #ifndef RESCUE
262 if (!feature_present("inet"))
263 return;
264 #endif
265 #endif
266 af_register(&af_inet);
267 }
268