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
31static 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 <err.h>
41#include <stdio.h>
42#include <stdlib.h>
43#include <string.h>
44#include <unistd.h>
45#include <ifaddrs.h>
46
47#include <arpa/inet.h>
48
49#include <netinet/in.h>
50#include <net/if_var.h>		/* for struct ifaddr */
51#include <netinet/in_var.h>
52#include <arpa/inet.h>
53#include <netdb.h>
54
55#include <netinet6/nd6.h>	/* Define ND6_INFINITE_LIFETIME */
56
57#include "ifconfig.h"
58
59static	struct in6_ifreq in6_ridreq;
60static	struct in6_aliasreq in6_addreq =
61  { .ifra_flags = 0,
62    .ifra_lifetime = { 0, 0, ND6_INFINITE_LIFETIME, ND6_INFINITE_LIFETIME } };
63static	int ip6lifetime;
64
65static	int prefix(void *, int);
66static	char *sec2str(time_t);
67static	int explicit_prefix = 0;
68
69extern void setnd6flags(const char *, int, int, const struct afswtch *);
70extern void setnd6defif(const char *, int, int, const struct afswtch *);
71extern void nd6_status(int);
72
73static	char addr_buf[MAXHOSTNAMELEN *2 + 1];	/*for getnameinfo()*/
74
75static void
76setifprefixlen(const char *addr, int dummy __unused, int s,
77    const struct afswtch *afp)
78{
79        if (afp->af_getprefix != NULL)
80                afp->af_getprefix(addr, MASK);
81	explicit_prefix = 1;
82}
83
84static void
85setip6flags(const char *dummyaddr __unused, int flag, int dummysoc __unused,
86    const struct afswtch *afp)
87{
88	if (afp->af_af != AF_INET6)
89		err(1, "address flags can be set only for inet6 addresses");
90
91	if (flag < 0)
92		in6_addreq.ifra_flags &= ~(-flag);
93	else
94		in6_addreq.ifra_flags |= flag;
95}
96
97static void
98setip6lifetime(const char *cmd, const char *val, int s,
99    const struct afswtch *afp)
100{
101	time_t newval, t;
102	char *ep;
103
104	t = time(NULL);
105	newval = (time_t)strtoul(val, &ep, 0);
106	if (val == ep)
107		errx(1, "invalid %s", cmd);
108	if (afp->af_af != AF_INET6)
109		errx(1, "%s not allowed for the AF", cmd);
110	if (strcmp(cmd, "vltime") == 0) {
111		in6_addreq.ifra_lifetime.ia6t_expire = t + newval;
112		in6_addreq.ifra_lifetime.ia6t_vltime = newval;
113	} else if (strcmp(cmd, "pltime") == 0) {
114		in6_addreq.ifra_lifetime.ia6t_preferred = t + newval;
115		in6_addreq.ifra_lifetime.ia6t_pltime = newval;
116	}
117}
118
119static void
120setip6pltime(const char *seconds, int dummy __unused, int s,
121    const struct afswtch *afp)
122{
123	setip6lifetime("pltime", seconds, s, afp);
124}
125
126static void
127setip6vltime(const char *seconds, int dummy __unused, int s,
128    const struct afswtch *afp)
129{
130	setip6lifetime("vltime", seconds, s, afp);
131}
132
133static void
134setip6eui64(const char *cmd, int dummy __unused, int s,
135    const struct afswtch *afp)
136{
137	struct ifaddrs *ifap, *ifa;
138	const struct sockaddr_in6 *sin6 = NULL;
139	const struct in6_addr *lladdr = NULL;
140	struct in6_addr *in6;
141
142	if (afp->af_af != AF_INET6)
143		errx(EXIT_FAILURE, "%s not allowed for the AF", cmd);
144 	in6 = (struct in6_addr *)&in6_addreq.ifra_addr.sin6_addr;
145	if (memcmp(&in6addr_any.s6_addr[8], &in6->s6_addr[8], 8) != 0)
146		errx(EXIT_FAILURE, "interface index is already filled");
147	if (getifaddrs(&ifap) != 0)
148		err(EXIT_FAILURE, "getifaddrs");
149	for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
150		if (ifa->ifa_addr->sa_family == AF_INET6 &&
151		    strcmp(ifa->ifa_name, name) == 0) {
152			sin6 = (const struct sockaddr_in6 *)ifa->ifa_addr;
153			if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
154				lladdr = &sin6->sin6_addr;
155				break;
156			}
157		}
158	}
159	if (!lladdr)
160		errx(EXIT_FAILURE, "could not determine link local address");
161
162 	memcpy(&in6->s6_addr[8], &lladdr->s6_addr[8], 8);
163
164	freeifaddrs(ifap);
165}
166
167static void
168in6_status(int s __unused, const struct ifaddrs *ifa)
169{
170	struct sockaddr_in6 *sin, null_sin;
171	struct in6_ifreq ifr6;
172	int s6;
173	u_int32_t flags6;
174	struct in6_addrlifetime lifetime;
175	time_t t = time(NULL);
176	int error;
177
178	memset(&null_sin, 0, sizeof(null_sin));
179
180	sin = (struct sockaddr_in6 *)ifa->ifa_addr;
181	if (sin == NULL)
182		return;
183
184	strncpy(ifr6.ifr_name, ifr.ifr_name, sizeof(ifr.ifr_name));
185	if ((s6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
186		warn("socket(AF_INET6,SOCK_DGRAM)");
187		return;
188	}
189	ifr6.ifr_addr = *sin;
190	if (ioctl(s6, SIOCGIFAFLAG_IN6, &ifr6) < 0) {
191		warn("ioctl(SIOCGIFAFLAG_IN6)");
192		close(s6);
193		return;
194	}
195	flags6 = ifr6.ifr_ifru.ifru_flags6;
196	memset(&lifetime, 0, sizeof(lifetime));
197	ifr6.ifr_addr = *sin;
198	if (ioctl(s6, SIOCGIFALIFETIME_IN6, &ifr6) < 0) {
199		warn("ioctl(SIOCGIFALIFETIME_IN6)");
200		close(s6);
201		return;
202	}
203	lifetime = ifr6.ifr_ifru.ifru_lifetime;
204	close(s6);
205
206	error = getnameinfo((struct sockaddr *)sin, sin->sin6_len, addr_buf,
207			    sizeof(addr_buf), NULL, 0, NI_NUMERICHOST);
208	if (error != 0)
209		inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf,
210			  sizeof(addr_buf));
211	printf("\tinet6 %s ", addr_buf);
212
213	if (ifa->ifa_flags & IFF_POINTOPOINT) {
214		sin = (struct sockaddr_in6 *)ifa->ifa_dstaddr;
215		/*
216		 * some of the interfaces do not have valid destination
217		 * address.
218		 */
219		if (sin != NULL && sin->sin6_family == AF_INET6) {
220			int error;
221
222			error = getnameinfo((struct sockaddr *)sin,
223					    sin->sin6_len, addr_buf,
224					    sizeof(addr_buf), NULL, 0,
225					    NI_NUMERICHOST);
226			if (error != 0)
227				inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf,
228					  sizeof(addr_buf));
229			printf("--> %s ", addr_buf);
230		}
231	}
232
233	sin = (struct sockaddr_in6 *)ifa->ifa_netmask;
234	if (sin == NULL)
235		sin = &null_sin;
236	printf("prefixlen %d ", prefix(&sin->sin6_addr,
237		sizeof(struct in6_addr)));
238
239	if ((flags6 & IN6_IFF_ANYCAST) != 0)
240		printf("anycast ");
241	if ((flags6 & IN6_IFF_TENTATIVE) != 0)
242		printf("tentative ");
243	if ((flags6 & IN6_IFF_DUPLICATED) != 0)
244		printf("duplicated ");
245	if ((flags6 & IN6_IFF_DETACHED) != 0)
246		printf("detached ");
247	if ((flags6 & IN6_IFF_DEPRECATED) != 0)
248		printf("deprecated ");
249	if ((flags6 & IN6_IFF_AUTOCONF) != 0)
250		printf("autoconf ");
251	if ((flags6 & IN6_IFF_TEMPORARY) != 0)
252		printf("temporary ");
253
254	if (((struct sockaddr_in6 *)(ifa->ifa_addr))->sin6_scope_id)
255		printf("scopeid 0x%x ",
256		    ((struct sockaddr_in6 *)(ifa->ifa_addr))->sin6_scope_id);
257
258	if (ip6lifetime && (lifetime.ia6t_preferred || lifetime.ia6t_expire)) {
259		printf("pltime ");
260		if (lifetime.ia6t_preferred) {
261			printf("%s ", lifetime.ia6t_preferred < t
262				? "0" : sec2str(lifetime.ia6t_preferred - t));
263		} else
264			printf("infty ");
265
266		printf("vltime ");
267		if (lifetime.ia6t_expire) {
268			printf("%s ", lifetime.ia6t_expire < t
269				? "0" : sec2str(lifetime.ia6t_expire - t));
270		} else
271			printf("infty ");
272	}
273
274	print_vhid(ifa, " ");
275
276	putchar('\n');
277}
278
279#define	SIN6(x) ((struct sockaddr_in6 *) &(x))
280static struct	sockaddr_in6 *sin6tab[] = {
281	SIN6(in6_ridreq.ifr_addr), SIN6(in6_addreq.ifra_addr),
282	SIN6(in6_addreq.ifra_prefixmask), SIN6(in6_addreq.ifra_dstaddr)
283};
284
285static void
286in6_getprefix(const char *plen, int which)
287{
288	struct sockaddr_in6 *sin = sin6tab[which];
289	u_char *cp;
290	int len = atoi(plen);
291
292	if ((len < 0) || (len > 128))
293		errx(1, "%s: bad value", plen);
294	sin->sin6_len = sizeof(*sin);
295	if (which != MASK)
296		sin->sin6_family = AF_INET6;
297	if ((len == 0) || (len == 128)) {
298		memset(&sin->sin6_addr, 0xff, sizeof(struct in6_addr));
299		return;
300	}
301	memset((void *)&sin->sin6_addr, 0x00, sizeof(sin->sin6_addr));
302	for (cp = (u_char *)&sin->sin6_addr; len > 7; len -= 8)
303		*cp++ = 0xff;
304	*cp = 0xff << (8 - len);
305}
306
307static void
308in6_getaddr(const char *s, int which)
309{
310	struct sockaddr_in6 *sin = sin6tab[which];
311	struct addrinfo hints, *res;
312	int error = -1;
313
314	newaddr &= 1;
315
316	sin->sin6_len = sizeof(*sin);
317	if (which != MASK)
318		sin->sin6_family = AF_INET6;
319
320	if (which == ADDR) {
321		char *p = NULL;
322		if((p = strrchr(s, '/')) != NULL) {
323			*p = '\0';
324			in6_getprefix(p + 1, MASK);
325			explicit_prefix = 1;
326		}
327	}
328
329	if (sin->sin6_family == AF_INET6) {
330		bzero(&hints, sizeof(struct addrinfo));
331		hints.ai_family = AF_INET6;
332		error = getaddrinfo(s, NULL, &hints, &res);
333	}
334	if (error != 0) {
335		if (inet_pton(AF_INET6, s, &sin->sin6_addr) != 1)
336			errx(1, "%s: bad value", s);
337	} else
338		bcopy(res->ai_addr, sin, res->ai_addrlen);
339}
340
341static int
342prefix(void *val, int size)
343{
344        u_char *name = (u_char *)val;
345        int byte, bit, plen = 0;
346
347        for (byte = 0; byte < size; byte++, plen += 8)
348                if (name[byte] != 0xff)
349                        break;
350	if (byte == size)
351		return (plen);
352	for (bit = 7; bit != 0; bit--, plen++)
353                if (!(name[byte] & (1 << bit)))
354                        break;
355        for (; bit != 0; bit--)
356                if (name[byte] & (1 << bit))
357                        return(0);
358        byte++;
359        for (; byte < size; byte++)
360                if (name[byte])
361                        return(0);
362        return (plen);
363}
364
365static char *
366sec2str(time_t total)
367{
368	static char result[256];
369	int days, hours, mins, secs;
370	int first = 1;
371	char *p = result;
372
373	if (0) {
374		days = total / 3600 / 24;
375		hours = (total / 3600) % 24;
376		mins = (total / 60) % 60;
377		secs = total % 60;
378
379		if (days) {
380			first = 0;
381			p += sprintf(p, "%dd", days);
382		}
383		if (!first || hours) {
384			first = 0;
385			p += sprintf(p, "%dh", hours);
386		}
387		if (!first || mins) {
388			first = 0;
389			p += sprintf(p, "%dm", mins);
390		}
391		sprintf(p, "%ds", secs);
392	} else
393		sprintf(result, "%lu", (unsigned long)total);
394
395	return(result);
396}
397
398static void
399in6_postproc(int s, const struct afswtch *afp)
400{
401	if (explicit_prefix == 0) {
402		/* Aggregatable address architecture defines all prefixes
403		   are 64. So, it is convenient to set prefixlen to 64 if
404		   it is not specified. */
405		setifprefixlen("64", 0, s, afp);
406		/* in6_getprefix("64", MASK) if MASK is available here... */
407	}
408}
409
410static void
411in6_status_tunnel(int s)
412{
413	char src[NI_MAXHOST];
414	char dst[NI_MAXHOST];
415	struct in6_ifreq in6_ifr;
416	const struct sockaddr *sa = (const struct sockaddr *) &in6_ifr.ifr_addr;
417
418	memset(&in6_ifr, 0, sizeof(in6_ifr));
419	strncpy(in6_ifr.ifr_name, name, IFNAMSIZ);
420
421	if (ioctl(s, SIOCGIFPSRCADDR_IN6, (caddr_t)&in6_ifr) < 0)
422		return;
423	if (sa->sa_family != AF_INET6)
424		return;
425	if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0,
426	    NI_NUMERICHOST) != 0)
427		src[0] = '\0';
428
429	if (ioctl(s, SIOCGIFPDSTADDR_IN6, (caddr_t)&in6_ifr) < 0)
430		return;
431	if (sa->sa_family != AF_INET6)
432		return;
433	if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0,
434	    NI_NUMERICHOST) != 0)
435		dst[0] = '\0';
436
437	printf("\ttunnel inet6 %s --> %s\n", src, dst);
438}
439
440static void
441in6_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres)
442{
443	struct in6_aliasreq in6_addreq;
444
445	memset(&in6_addreq, 0, sizeof(in6_addreq));
446	strncpy(in6_addreq.ifra_name, name, IFNAMSIZ);
447	memcpy(&in6_addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len);
448	memcpy(&in6_addreq.ifra_dstaddr, dstres->ai_addr,
449	    dstres->ai_addr->sa_len);
450
451	if (ioctl(s, SIOCSIFPHYADDR_IN6, &in6_addreq) < 0)
452		warn("SIOCSIFPHYADDR_IN6");
453}
454
455static struct cmd inet6_cmds[] = {
456	DEF_CMD_ARG("prefixlen",			setifprefixlen),
457	DEF_CMD("anycast",	IN6_IFF_ANYCAST,	setip6flags),
458	DEF_CMD("tentative",	IN6_IFF_TENTATIVE,	setip6flags),
459	DEF_CMD("-tentative",	-IN6_IFF_TENTATIVE,	setip6flags),
460	DEF_CMD("deprecated",	IN6_IFF_DEPRECATED,	setip6flags),
461	DEF_CMD("-deprecated", -IN6_IFF_DEPRECATED,	setip6flags),
462	DEF_CMD("autoconf",	IN6_IFF_AUTOCONF,	setip6flags),
463	DEF_CMD("-autoconf",	-IN6_IFF_AUTOCONF,	setip6flags),
464	DEF_CMD("accept_rtadv",	ND6_IFF_ACCEPT_RTADV,	setnd6flags),
465	DEF_CMD("-accept_rtadv",-ND6_IFF_ACCEPT_RTADV,	setnd6flags),
466	DEF_CMD("no_radr",	ND6_IFF_NO_RADR,	setnd6flags),
467	DEF_CMD("-no_radr",	-ND6_IFF_NO_RADR,	setnd6flags),
468	DEF_CMD("defaultif",	1,			setnd6defif),
469	DEF_CMD("-defaultif",	-1,			setnd6defif),
470	DEF_CMD("ifdisabled",	ND6_IFF_IFDISABLED,	setnd6flags),
471	DEF_CMD("-ifdisabled",	-ND6_IFF_IFDISABLED,	setnd6flags),
472	DEF_CMD("nud",		ND6_IFF_PERFORMNUD,	setnd6flags),
473	DEF_CMD("-nud",		-ND6_IFF_PERFORMNUD,	setnd6flags),
474	DEF_CMD("auto_linklocal",ND6_IFF_AUTO_LINKLOCAL,setnd6flags),
475	DEF_CMD("-auto_linklocal",-ND6_IFF_AUTO_LINKLOCAL,setnd6flags),
476	DEF_CMD("no_prefer_iface",ND6_IFF_NO_PREFER_IFACE,setnd6flags),
477	DEF_CMD("-no_prefer_iface",-ND6_IFF_NO_PREFER_IFACE,setnd6flags),
478	DEF_CMD_ARG("pltime",        			setip6pltime),
479	DEF_CMD_ARG("vltime",        			setip6vltime),
480	DEF_CMD("eui64",	0,			setip6eui64),
481};
482
483static struct afswtch af_inet6 = {
484	.af_name	= "inet6",
485	.af_af		= AF_INET6,
486	.af_status	= in6_status,
487	.af_getaddr	= in6_getaddr,
488	.af_getprefix	= in6_getprefix,
489	.af_other_status = nd6_status,
490	.af_postproc	= in6_postproc,
491	.af_status_tunnel = in6_status_tunnel,
492	.af_settunnel	= in6_set_tunnel,
493	.af_difaddr	= SIOCDIFADDR_IN6,
494	.af_aifaddr	= SIOCAIFADDR_IN6,
495	.af_ridreq	= &in6_addreq,
496	.af_addreq	= &in6_addreq,
497};
498
499static void
500in6_Lopt_cb(const char *optarg __unused)
501{
502	ip6lifetime++;	/* print IPv6 address lifetime */
503}
504static struct option in6_Lopt = { .opt = "L", .opt_usage = "[-L]", .cb = in6_Lopt_cb };
505
506static __constructor void
507inet6_ctor(void)
508{
509#define	N(a)	(sizeof(a) / sizeof(a[0]))
510	size_t i;
511
512#ifndef RESCUE
513	if (!feature_present("inet6"))
514		return;
515#endif
516
517	for (i = 0; i < N(inet6_cmds);  i++)
518		cmd_register(&inet6_cmds[i]);
519	af_register(&af_inet6);
520	opt_register(&in6_Lopt);
521#undef N
522}
523