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source: rtems-libbsd/freebsd-userspace/commands/sbin/ifconfig/ifconfig.c @ ebbe3cc

4.1155-freebsd-126-freebsd-12freebsd-9.3

Last change on this file since ebbe3cc was ebbe3cc, checked in by Jennifer Averett <jennifer.averett@…>, on 09/07/12 at 18:16:22
Added the ifconfig command.
Property mode set to `100644`
File size: 28.4 KB

Line
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 copyright[] =
32	"@(#) Copyright (c) 1983, 1993\n\
33	The Regents of the University of California. All rights reserved.\n";
34	#endif /* not lint */
35
36	#ifndef lint
37	#if 0
38	static char sccsid[] = "@(#)ifconfig.c 8.2 (Berkeley) 2/16/94";
39	#endif
40	static const char rcsid[] =
41	"$FreeBSD$";
42	#endif /* not lint */
43
44	#include <sys/param.h>
45	#include <sys/ioctl.h>
46	#include <sys/socket.h>
47	#include <sys/time.h>
48	#ifdef __rtems__
49	#include <freebsd/sys/module.h>
50	#include <freebsd/sys/linker.h>
51	#else
52	#include <sys/module.h>
53	#include <sys/linker.h>
54	#endif
55
56	#include <net/ethernet.h>
57	#include <net/if.h>
58	#ifdef __rtems__
59	#include <freebsd/net/if_var.h>
60	#else
61	#include <net/if_var.h>
62	#endif
63	#include <net/if_dl.h>
64	#include <net/if_types.h>
65	#include <net/route.h>
66
67	/* IP */
68	#include <netinet/in.h>
69	#ifdef __rtems__
70	#include <freebsd/netinet/in_var.h>
71	#else
72	#include <netinet/in_var.h>
73	#endif
74	#include <arpa/inet.h>
75	#include <netdb.h>
76
77	#include <ifaddrs.h>
78	#include <ctype.h>
79	#include <err.h>
80	#include <errno.h>
81	#include <fcntl.h>
82
83	#ifndef __rtems__
84	#include <jail.h>
85	#endif
86
87	#include <stdio.h>
88	#include <stdlib.h>
89	#include <string.h>
90	#include <unistd.h>
91
92	#include "ifconfig.h"
93
94	/*
95	* Since "struct ifreq" is composed of various union members, callers
96	* should pay special attention to interprete the value.
97	* (.e.g. little/big endian difference in the structure.)
98	*/
99	struct ifreq ifr;
100
101	char name[IFNAMSIZ];
102	char *descr = NULL;
103	size_t descrlen = 64;
104	int setaddr;
105	int setmask;
106	int doalias;
107	int clearaddr;
108	int newaddr = 1;
109	int verbose;
110	int noload;
111
112	int supmedia = 0;
113	int printkeys = 0; /* Print keying material for interfaces. */
114
115	static int ifconfig(int argc, char const argv, int iscreate,
116	const struct afswtch *afp);
117	static void status(const struct afswtch afp, const struct sockaddr_dl sdl,
118	struct ifaddrs *ifa);
119	static void tunnel_status(int s);
120	static void usage(void);
121
122	static struct afswtch af_getbyname(const char name);
123	static struct afswtch *af_getbyfamily(int af);
124	static void af_other_status(int);
125
126	static struct option *opts = NULL;
127
128	void
129	opt_register(struct option *p)
130	{
131	p->next = opts;
132	opts = p;
133	}
134
135	static void
136	usage(void)
137	{
138	char options[1024];
139	struct option *p;
140
141	/* XXX not right but close enough for now */
142	options[0] = '\0';
143	for (p = opts; p != NULL; p = p->next) {
144	strlcat(options, p->opt_usage, sizeof(options));
145	strlcat(options, " ", sizeof(options));
146	}
147
148	fprintf(stderr,
149	"usage: ifconfig %sinterface address_family [address [dest_address]]\n"
150	" [parameters]\n"
151	" ifconfig interface create\n"
152	" ifconfig -a %s[-d] [-m] [-u] [-v] [address_family]\n"
153	" ifconfig -l [-d] [-u] [address_family]\n"
154	" ifconfig %s[-d] [-m] [-u] [-v]\n",
155	options, options, options);
156	exit(1);
157	}
158
159	int
160	main(int argc, char *argv[])
161	{
162	int c, all, namesonly, downonly, uponly;
163	const struct afswtch *afp = NULL;
164	int ifindex;
165	struct ifaddrs ifap, ifa;
166	struct ifreq paifr;
167	const struct sockaddr_dl *sdl;
168	char options[1024], *cp;
169	const char *ifname;
170	struct option *p;
171	size_t iflen;
172
173	all = downonly = uponly = namesonly = noload = verbose = 0;
174
175	/* Parse leading line options */
176	strlcpy(options, "adklmnuv", sizeof(options));
177	for (p = opts; p != NULL; p = p->next)
178	strlcat(options, p->opt, sizeof(options));
179	while ((c = getopt(argc, argv, options)) != -1) {
180	switch (c) {
181	case 'a': /* scan all interfaces */
182	all++;
183	break;
184	case 'd': /* restrict scan to "down" interfaces */
185	downonly++;
186	break;
187	case 'k':
188	printkeys++;
189	break;
190	case 'l': /* scan interface names only */
191	namesonly++;
192	break;
193	case 'm': /* show media choices in status */
194	supmedia = 1;
195	break;
196	case 'n': /* suppress module loading */
197	noload++;
198	break;
199	case 'u': /* restrict scan to "up" interfaces */
200	uponly++;
201	break;
202	case 'v':
203	verbose++;
204	break;
205	default:
206	for (p = opts; p != NULL; p = p->next)
207	if (p->opt[0] == c) {
208	p->cb(optarg);
209	break;
210	}
211	if (p == NULL)
212	usage();
213	break;
214	}
215	}
216	argc -= optind;
217	argv += optind;
218
219	/* -l cannot be used with -a or -m */
220	if (namesonly && (all \|\| supmedia))
221	usage();
222
223	/* nonsense.. */
224	if (uponly && downonly)
225	usage();
226
227	/* no arguments is equivalent to '-a' */
228	if (!namesonly && argc < 1)
229	all = 1;
230
231	/* -a and -l allow an address family arg to limit the output */
232	if (all \|\| namesonly) {
233	if (argc > 1)
234	usage();
235
236	ifname = NULL;
237	ifindex = 0;
238	if (argc == 1) {
239	afp = af_getbyname(*argv);
240	if (afp == NULL)
241	usage();
242	if (afp->af_name != NULL)
243	argc--, argv++;
244	/* leave with afp non-zero */
245	}
246	} else {
247	/* not listing, need an argument */
248	if (argc < 1)
249	usage();
250
251	ifname = *argv;
252	argc--, argv++;
253
254	/* check and maybe load support for this interface */
255	ifmaybeload(ifname);
256
257	ifindex = if_nametoindex(ifname);
258	if (ifindex == 0) {
259	/*
260	* NOTE: We must special-case the `create' command
261	* right here as we would otherwise fail when trying
262	* to find the interface.
263	*/
264	if (argc > 0 && (strcmp(argv[0], "create") == 0 \|\|
265	strcmp(argv[0], "plumb") == 0)) {
266	iflen = strlcpy(name, ifname, sizeof(name));
267	if (iflen >= sizeof(name))
268	errx(1, "%s: cloning name too long",
269	ifname);
270	ifconfig(argc, argv, 1, NULL);
271	exit(0);
272	}
273	/*
274	* NOTE: We have to special-case the `-vnet' command
275	* right here as we would otherwise fail when trying
276	* to find the interface as it lives in another vnet.
277	*/
278	if (argc > 0 && (strcmp(argv[0], "-vnet") == 0)) {
279	iflen = strlcpy(name, ifname, sizeof(name));
280	if (iflen >= sizeof(name))
281	errx(1, "%s: interface name too long",
282	ifname);
283	ifconfig(argc, argv, 0, NULL);
284	exit(0);
285	}
286	errx(1, "interface %s does not exist", ifname);
287	}
288	}
289
290	/* Check for address family */
291	if (argc > 0) {
292	afp = af_getbyname(*argv);
293	if (afp != NULL)
294	argc--, argv++;
295	}
296
297	if (getifaddrs(&ifap) != 0)
298	err(EXIT_FAILURE, "getifaddrs");
299	cp = NULL;
300	ifindex = 0;
301	for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
302	memset(&paifr, 0, sizeof(paifr));
303	strncpy(paifr.ifr_name, ifa->ifa_name, sizeof(paifr.ifr_name));
304	if (sizeof(paifr.ifr_addr) >= ifa->ifa_addr->sa_len) {
305	memcpy(&paifr.ifr_addr, ifa->ifa_addr,
306	ifa->ifa_addr->sa_len);
307	}
308
309	if (ifname != NULL && strcmp(ifname, ifa->ifa_name) != 0)
310	continue;
311	if (ifa->ifa_addr->sa_family == AF_LINK)
312	sdl = (const struct sockaddr_dl *) ifa->ifa_addr;
313	else
314	sdl = NULL;
315	if (cp != NULL && strcmp(cp, ifa->ifa_name) == 0)
316	continue;
317	iflen = strlcpy(name, ifa->ifa_name, sizeof(name));
318	if (iflen >= sizeof(name)) {
319	warnx("%s: interface name too long, skipping",
320	ifa->ifa_name);
321	continue;
322	}
323	cp = ifa->ifa_name;
324
325	if (downonly && (ifa->ifa_flags & IFF_UP) != 0)
326	continue;
327	if (uponly && (ifa->ifa_flags & IFF_UP) == 0)
328	continue;
329	ifindex++;
330	/*
331	* Are we just listing the interfaces?
332	*/
333	if (namesonly) {
334	if (ifindex > 1)
335	printf(" ");
336	fputs(name, stdout);
337	continue;
338	}
339
340	if (argc > 0)
341	ifconfig(argc, argv, 0, afp);
342	else
343	status(afp, sdl, ifa);
344	}
345	if (namesonly)
346	printf("\n");
347	freeifaddrs(ifap);
348
349	exit(0);
350	}
351
352	static struct afswtch *afs = NULL;
353
354	void
355	af_register(struct afswtch *p)
356	{
357	p->af_next = afs;
358	afs = p;
359	}
360
361	static struct afswtch *
362	af_getbyname(const char *name)
363	{
364	struct afswtch *afp;
365
366	for (afp = afs; afp != NULL; afp = afp->af_next)
367	if (strcmp(afp->af_name, name) == 0)
368	return afp;
369	return NULL;
370	}
371
372	static struct afswtch *
373	af_getbyfamily(int af)
374	{
375	struct afswtch *afp;
376
377	for (afp = afs; afp != NULL; afp = afp->af_next)
378	if (afp->af_af == af)
379	return afp;
380	return NULL;
381	}
382
383	static void
384	af_other_status(int s)
385	{
386	struct afswtch *afp;
387	uint8_t afmask[howmany(AF_MAX, NBBY)];
388
389	memset(afmask, 0, sizeof(afmask));
390	for (afp = afs; afp != NULL; afp = afp->af_next) {
391	if (afp->af_other_status == NULL)
392	continue;
393	if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af))
394	continue;
395	afp->af_other_status(s);
396	setbit(afmask, afp->af_af);
397	}
398	}
399
400	static void
401	af_all_tunnel_status(int s)
402	{
403	struct afswtch *afp;
404	uint8_t afmask[howmany(AF_MAX, NBBY)];
405
406	memset(afmask, 0, sizeof(afmask));
407	for (afp = afs; afp != NULL; afp = afp->af_next) {
408	if (afp->af_status_tunnel == NULL)
409	continue;
410	if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af))
411	continue;
412	afp->af_status_tunnel(s);
413	setbit(afmask, afp->af_af);
414	}
415	}
416
417	static struct cmd *cmds = NULL;
418
419	void
420	cmd_register(struct cmd *p)
421	{
422	p->c_next = cmds;
423	cmds = p;
424	}
425
426	static const struct cmd *
427	cmd_lookup(const char *name, int iscreate)
428	{
429	#define N(a) (sizeof(a)/sizeof(a[0]))
430	const struct cmd *p;
431
432	for (p = cmds; p != NULL; p = p->c_next)
433	if (strcmp(name, p->c_name) == 0) {
434	if (iscreate) {
435	if (p->c_iscloneop)
436	return p;
437	} else {
438	if (!p->c_iscloneop)
439	return p;
440	}
441	}
442	return NULL;
443	#undef N
444	}
445
446	struct callback {
447	callback_func *cb_func;
448	void *cb_arg;
449	struct callback *cb_next;
450	};
451	static struct callback *callbacks = NULL;
452
453	void
454	callback_register(callback_func func, void arg)
455	{
456	struct callback *cb;
457
458	cb = malloc(sizeof(struct callback));
459	if (cb == NULL)
460	errx(1, "unable to allocate memory for callback");
461	cb->cb_func = func;
462	cb->cb_arg = arg;
463	cb->cb_next = callbacks;
464	callbacks = cb;
465	}
466
467	/* specially-handled commands */
468	static void setifaddr(const char , int, int, const struct afswtch );
469	static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr);
470
471	static void setifdstaddr(const char , int, int, const struct afswtch );
472	static const struct cmd setifdstaddr_cmd =
473	DEF_CMD("ifdstaddr", 0, setifdstaddr);
474
475	static int
476	ifconfig(int argc, char const argv, int iscreate, const struct afswtch *uafp)
477	{
478	const struct afswtch afp, nafp;
479	const struct cmd *p;
480	struct callback *cb;
481	int s;
482
483	strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
484	afp = uafp != NULL ? uafp : af_getbyname("inet");
485	top:
486	ifr.ifr_addr.sa_family =
487	afp->af_af == AF_LINK \|\| afp->af_af == AF_UNSPEC ?
488	AF_LOCAL : afp->af_af;
489
490	if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0 &&
491	(uafp != NULL \|\| errno != EPROTONOSUPPORT \|\|
492	(s = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0))
493	err(1, "socket(family %u,SOCK_DGRAM", ifr.ifr_addr.sa_family);
494
495	while (argc > 0) {
496	p = cmd_lookup(*argv, iscreate);
497	if (iscreate && p == NULL) {
498	/*
499	* Push the clone create callback so the new
500	* device is created and can be used for any
501	* remaining arguments.
502	*/
503	cb = callbacks;
504	if (cb == NULL)
505	errx(1, "internal error, no callback");
506	callbacks = cb->cb_next;
507	cb->cb_func(s, cb->cb_arg);
508	iscreate = 0;
509	/*
510	* Handle any address family spec that
511	* immediately follows and potentially
512	* recreate the socket.
513	*/
514	nafp = af_getbyname(*argv);
515	if (nafp != NULL) {
516	argc--, argv++;
517	if (nafp != afp) {
518	close(s);
519	afp = nafp;
520	goto top;
521	}
522	}
523	/*
524	* Look for a normal parameter.
525	*/
526	continue;
527	}
528	if (p == NULL) {
529	/*
530	* Not a recognized command, choose between setting
531	* the interface address and the dst address.
532	*/
533	p = (setaddr ? &setifdstaddr_cmd : &setifaddr_cmd);
534	}
535	if (p->c_u.c_func \|\| p->c_u.c_func2) {
536	if (p->c_parameter == NEXTARG) {
537	if (argv[1] == NULL)
538	errx(1, "'%s' requires argument",
539	p->c_name);
540	p->c_u.c_func(argv[1], 0, s, afp);
541	argc--, argv++;
542	} else if (p->c_parameter == OPTARG) {
543	p->c_u.c_func(argv[1], 0, s, afp);
544	if (argv[1] != NULL)
545	argc--, argv++;
546	} else if (p->c_parameter == NEXTARG2) {
547	if (argc < 3)
548	errx(1, "'%s' requires 2 arguments",
549	p->c_name);
550	p->c_u.c_func2(argv[1], argv[2], s, afp);
551	argc -= 2, argv += 2;
552	} else
553	p->c_u.c_func(*argv, p->c_parameter, s, afp);
554	}
555	argc--, argv++;
556	}
557
558	/*
559	* Do any post argument processing required by the address family.
560	*/
561	if (afp->af_postproc != NULL)
562	afp->af_postproc(s, afp);
563	/*
564	* Do deferred callbacks registered while processing
565	* command-line arguments.
566	*/
567	for (cb = callbacks; cb != NULL; cb = cb->cb_next)
568	cb->cb_func(s, cb->cb_arg);
569	/*
570	* Do deferred operations.
571	*/
572	if (clearaddr) {
573	if (afp->af_ridreq == NULL \|\| afp->af_difaddr == 0) {
574	warnx("interface %s cannot change %s addresses!",
575	name, afp->af_name);
576	clearaddr = 0;
577	}
578	}
579	if (clearaddr) {
580	int ret;
581	strncpy(afp->af_ridreq, name, sizeof ifr.ifr_name);
582	ret = ioctl(s, afp->af_difaddr, afp->af_ridreq);
583	if (ret < 0) {
584	if (errno == EADDRNOTAVAIL && (doalias >= 0)) {
585	/* means no previous address for interface */
586	} else
587	Perror("ioctl (SIOCDIFADDR)");
588	}
589	}
590	if (newaddr) {
591	if (afp->af_addreq == NULL \|\| afp->af_aifaddr == 0) {
592	warnx("interface %s cannot change %s addresses!",
593	name, afp->af_name);
594	newaddr = 0;
595	}
596	}
597	if (newaddr && (setaddr \|\| setmask)) {
598	strncpy(afp->af_addreq, name, sizeof ifr.ifr_name);
599	if (ioctl(s, afp->af_aifaddr, afp->af_addreq) < 0)
600	Perror("ioctl (SIOCAIFADDR)");
601	}
602
603	close(s);
604	return(0);
605	}
606
607	/ARGSUSED/
608	static void
609	setifaddr(const char addr, int param, int s, const struct afswtch afp)
610	{
611	if (afp->af_getaddr == NULL)
612	return;
613	/*
614	* Delay the ioctl to set the interface addr until flags are all set.
615	* The address interpretation may depend on the flags,
616	* and the flags may change when the address is set.
617	*/
618	setaddr++;
619	if (doalias == 0 && afp->af_af != AF_LINK)
620	clearaddr = 1;
621	afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR));
622	}
623
624	static void
625	settunnel(const char src, const char dst, int s, const struct afswtch *afp)
626	{
627	struct addrinfo srcres, dstres;
628	int ecode;
629
630	if (afp->af_settunnel == NULL) {
631	warn("address family %s does not support tunnel setup",
632	afp->af_name);
633	return;
634	}
635
636	if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0)
637	errx(1, "error in parsing address string: %s",
638	gai_strerror(ecode));
639
640	if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0)
641	errx(1, "error in parsing address string: %s",
642	gai_strerror(ecode));
643
644	if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family)
645	errx(1,
646	"source and destination address families do not match");
647
648	afp->af_settunnel(s, srcres, dstres);
649
650	freeaddrinfo(srcres);
651	freeaddrinfo(dstres);
652	}
653
654	/* ARGSUSED */
655	static void
656	deletetunnel(const char vname, int param, int s, const struct afswtch afp)
657	{
658
659	if (ioctl(s, SIOCDIFPHYADDR, &ifr) < 0)
660	err(1, "SIOCDIFPHYADDR");
661	}
662
663	static void
664	setifvnet(const char *jname, int dummy __unused, int s,
665	const struct afswtch *afp)
666	{
667	struct ifreq my_ifr;
668
669	memcpy(&my_ifr, &ifr, sizeof(my_ifr));
670	my_ifr.ifr_jid = jail_getid(jname);
671	#ifndef __rtems__
672	if (my_ifr.ifr_jid < 0)
673	errx(1, "%s", jail_errmsg);
674	#endif
675	if (ioctl(s, SIOCSIFVNET, &my_ifr) < 0)
676	err(1, "SIOCSIFVNET");
677	}
678
679	static void
680	setifrvnet(const char *jname, int dummy __unused, int s,
681	const struct afswtch *afp)
682	{
683	struct ifreq my_ifr;
684
685	memcpy(&my_ifr, &ifr, sizeof(my_ifr));
686	my_ifr.ifr_jid = jail_getid(jname);
687	#ifndef __rtems__
688	if (my_ifr.ifr_jid < 0)
689	errx(1, "%s", jail_errmsg);
690	#endif
691	if (ioctl(s, SIOCSIFRVNET, &my_ifr) < 0)
692	err(1, "SIOCSIFRVNET(%d, %s)", my_ifr.ifr_jid, my_ifr.ifr_name);
693	}
694
695	static void
696	setifnetmask(const char *addr, int dummy __unused, int s,
697	const struct afswtch *afp)
698	{
699	if (afp->af_getaddr != NULL) {
700	setmask++;
701	afp->af_getaddr(addr, MASK);
702	}
703	}
704
705	static void
706	setifbroadaddr(const char *addr, int dummy __unused, int s,
707	const struct afswtch *afp)
708	{
709	if (afp->af_getaddr != NULL)
710	afp->af_getaddr(addr, DSTADDR);
711	}
712
713	static void
714	setifipdst(const char *addr, int dummy __unused, int s,
715	const struct afswtch *afp)
716	{
717	const struct afswtch *inet;
718
719	inet = af_getbyname("inet");
720	if (inet == NULL)
721	return;
722	inet->af_getaddr(addr, DSTADDR);
723	clearaddr = 0;
724	newaddr = 0;
725	}
726
727	static void
728	notealias(const char addr, int param, int s, const struct afswtch afp)
729	{
730	#define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr))
731	if (setaddr && doalias == 0 && param < 0)
732	if (afp->af_addreq != NULL && afp->af_ridreq != NULL)
733	bcopy((caddr_t)rqtosa(af_addreq),
734	(caddr_t)rqtosa(af_ridreq),
735	rqtosa(af_addreq)->sa_len);
736	doalias = param;
737	if (param < 0) {
738	clearaddr = 1;
739	newaddr = 0;
740	} else
741	clearaddr = 0;
742	#undef rqtosa
743	}
744
745	/ARGSUSED/
746	static void
747	setifdstaddr(const char *addr, int param __unused, int s,
748	const struct afswtch *afp)
749	{
750	if (afp->af_getaddr != NULL)
751	afp->af_getaddr(addr, DSTADDR);
752	}
753
754	/*
755	* Note: doing an SIOCIGIFFLAGS scribbles on the union portion
756	* of the ifreq structure, which may confuse other parts of ifconfig.
757	* Make a private copy so we can avoid that.
758	*/
759	static void
760	setifflags(const char vname, int value, int s, const struct afswtch afp)
761	{
762	struct ifreq my_ifr;
763	int flags;
764
765	memset(&my_ifr, 0, sizeof(my_ifr));
766	(void) strlcpy(my_ifr.ifr_name, name, sizeof(my_ifr.ifr_name));
767
768	if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) {
769	Perror("ioctl (SIOCGIFFLAGS)");
770	exit(1);
771	}
772	flags = (my_ifr.ifr_flags & 0xffff) \| (my_ifr.ifr_flagshigh << 16);
773
774	if (value < 0) {
775	value = -value;
776	flags &= ~value;
777	} else
778	flags \|= value;
779	my_ifr.ifr_flags = flags & 0xffff;
780	my_ifr.ifr_flagshigh = flags >> 16;
781	if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0)
782	Perror(vname);
783	}
784
785	void
786	setifcap(const char vname, int value, int s, const struct afswtch afp)
787	{
788	int flags;
789
790	if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) < 0) {
791	Perror("ioctl (SIOCGIFCAP)");
792	exit(1);
793	}
794	flags = ifr.ifr_curcap;
795	if (value < 0) {
796	value = -value;
797	flags &= ~value;
798	} else
799	flags \|= value;
800	flags &= ifr.ifr_reqcap;
801	ifr.ifr_reqcap = flags;
802	if (ioctl(s, SIOCSIFCAP, (caddr_t)&ifr) < 0)
803	Perror(vname);
804	}
805
806	static void
807	setifmetric(const char *val, int dummy __unused, int s,
808	const struct afswtch *afp)
809	{
810	strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
811	ifr.ifr_metric = atoi(val);
812	if (ioctl(s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0)
813	warn("ioctl (set metric)");
814	}
815
816	static void
817	setifmtu(const char *val, int dummy __unused, int s,
818	const struct afswtch *afp)
819	{
820	strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
821	ifr.ifr_mtu = atoi(val);
822	if (ioctl(s, SIOCSIFMTU, (caddr_t)&ifr) < 0)
823	warn("ioctl (set mtu)");
824	}
825
826	static void
827	setifname(const char *val, int dummy __unused, int s,
828	const struct afswtch *afp)
829	{
830	char *newname;
831
832	newname = strdup(val);
833	if (newname == NULL) {
834	warn("no memory to set ifname");
835	return;
836	}
837	ifr.ifr_data = newname;
838	if (ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) {
839	warn("ioctl (set name)");
840	free(newname);
841	return;
842	}
843	strlcpy(name, newname, sizeof(name));
844	free(newname);
845	}
846
847	/* ARGSUSED */
848	static void
849	setifdescr(const char *val, int dummy __unused, int s,
850	const struct afswtch *afp)
851	{
852	char *newdescr;
853
854	ifr.ifr_buffer.length = strlen(val) + 1;
855	if (ifr.ifr_buffer.length == 1) {
856	ifr.ifr_buffer.buffer = newdescr = NULL;
857	ifr.ifr_buffer.length = 0;
858	} else {
859	newdescr = strdup(val);
860	ifr.ifr_buffer.buffer = newdescr;
861	if (newdescr == NULL) {
862	warn("no memory to set ifdescr");
863	return;
864	}
865	}
866
867	if (ioctl(s, SIOCSIFDESCR, (caddr_t)&ifr) < 0)
868	warn("ioctl (set descr)");
869
870	free(newdescr);
871	}
872
873	/* ARGSUSED */
874	static void
875	unsetifdescr(const char val, int value, int s, const struct afswtch afp)
876	{
877
878	setifdescr("", 0, s, 0);
879	}
880
881	#define IFFBITS \
882	"\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6SMART\7RUNNING" \
883	"\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2" \
884	"\20MULTICAST\22PPROMISC\23MONITOR\24STATICARP"
885
886	#define IFCAPBITS \
887	"\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7POLLING" \
888	"\10VLAN_HWCSUM\11TSO4\12TSO6\13LRO\14WOL_UCAST\15WOL_MCAST\16WOL_MAGIC" \
889	"\21VLAN_HWFILTER\23VLAN_HWTSO\24LINKSTATE"
890
891	/*
892	* Print the status of the interface. If an address family was
893	* specified, show only it; otherwise, show them all.
894	*/
895	static void
896	status(const struct afswtch afp, const struct sockaddr_dl sdl,
897	struct ifaddrs *ifa)
898	{
899	struct ifaddrs *ift;
900	int allfamilies, s;
901	struct ifstat ifs;
902
903	if (afp == NULL) {
904	allfamilies = 1;
905	ifr.ifr_addr.sa_family = AF_LOCAL;
906	} else {
907	allfamilies = 0;
908	ifr.ifr_addr.sa_family =
909	afp->af_af == AF_LINK ? AF_LOCAL : afp->af_af;
910	}
911	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
912
913	s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0);
914	if (s < 0)
915	err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family);
916
917	printf("%s: ", name);
918	printb("flags", ifa->ifa_flags, IFFBITS);
919	if (ioctl(s, SIOCGIFMETRIC, &ifr) != -1)
920	printf(" metric %d", ifr.ifr_metric);
921	if (ioctl(s, SIOCGIFMTU, &ifr) != -1)
922	printf(" mtu %d", ifr.ifr_mtu);
923	putchar('\n');
924
925	for (;;) {
926	if ((descr = reallocf(descr, descrlen)) != NULL) {
927	ifr.ifr_buffer.buffer = descr;
928	ifr.ifr_buffer.length = descrlen;
929	if (ioctl(s, SIOCGIFDESCR, &ifr) == 0) {
930	if (ifr.ifr_buffer.buffer == descr) {
931	if (strlen(descr) > 0)
932	printf("\tdescription: %s\n",
933	descr);
934	} else if (ifr.ifr_buffer.length > descrlen) {
935	descrlen = ifr.ifr_buffer.length;
936	continue;
937	}
938	}
939	} else
940	warn("unable to allocate memory for interface"
941	"description");
942	break;
943	}
944
945	if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) == 0) {
946	if (ifr.ifr_curcap != 0) {
947	printb("\toptions", ifr.ifr_curcap, IFCAPBITS);
948	putchar('\n');
949	}
950	if (supmedia && ifr.ifr_reqcap != 0) {
951	printb("\tcapabilities", ifr.ifr_reqcap, IFCAPBITS);
952	putchar('\n');
953	}
954	}
955
956	tunnel_status(s);
957
958	for (ift = ifa; ift != NULL; ift = ift->ifa_next) {
959	if (ift->ifa_addr == NULL)
960	continue;
961	if (strcmp(ifa->ifa_name, ift->ifa_name) != 0)
962	continue;
963	if (allfamilies) {
964	const struct afswtch *p;
965	p = af_getbyfamily(ift->ifa_addr->sa_family);
966	if (p != NULL && p->af_status != NULL)
967	p->af_status(s, ift);
968	} else if (afp->af_af == ift->ifa_addr->sa_family)
969	afp->af_status(s, ift);
970	}
971	#if 0
972	if (allfamilies \|\| afp->af_af == AF_LINK) {
973	const struct afswtch *lafp;
974
975	/*
976	* Hack; the link level address is received separately
977	* from the routing information so any address is not
978	* handled above. Cobble together an entry and invoke
979	* the status method specially.
980	*/
981	lafp = af_getbyname("lladdr");
982	if (lafp != NULL) {
983	info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl;
984	lafp->af_status(s, &info);
985	}
986	}
987	#endif
988	if (allfamilies)
989	af_other_status(s);
990	else if (afp->af_other_status != NULL)
991	afp->af_other_status(s);
992
993	strncpy(ifs.ifs_name, name, sizeof ifs.ifs_name);
994	if (ioctl(s, SIOCGIFSTATUS, &ifs) == 0)
995	printf("%s", ifs.ascii);
996
997	close(s);
998	return;
999	}
1000
1001	static void
1002	tunnel_status(int s)
1003	{
1004	af_all_tunnel_status(s);
1005	}
1006
1007	void
1008	Perror(const char *cmd)
1009	{
1010	switch (errno) {
1011
1012	case ENXIO:
1013	errx(1, "%s: no such interface", cmd);
1014	break;
1015
1016	case EPERM:
1017	errx(1, "%s: permission denied", cmd);
1018	break;
1019
1020	default:
1021	err(1, "%s", cmd);
1022	}
1023	}
1024
1025	/*
1026	* Print a value a la the %b format of the kernel's printf
1027	*/
1028	void
1029	printb(const char s, unsigned v, const char bits)
1030	{
1031	int i, any = 0;
1032	char c;
1033
1034	if (bits && *bits == 8)
1035	printf("%s=%o", s, v);
1036	else
1037	printf("%s=%x", s, v);
1038	bits++;
1039	if (bits) {
1040	putchar('<');
1041	while ((i = *bits++) != '\0') {
1042	if (v & (1 << (i-1))) {
1043	if (any)
1044	putchar(',');
1045	any = 1;
1046	for (; (c = *bits) > 32; bits++)
1047	putchar(c);
1048	} else
1049	for (; *bits > 32; bits++)
1050	;
1051	}
1052	putchar('>');
1053	}
1054	}
1055
1056	void
1057	ifmaybeload(const char *name)
1058	{
1059	#define MOD_PREFIX_LEN 3 /* "if_" */
1060	struct module_stat mstat;
1061	int fileid, modid;
1062	char ifkind[IFNAMSIZ + MOD_PREFIX_LEN], ifname[IFNAMSIZ], *dp;
1063	const char *cp;
1064
1065	/* loading suppressed by the user */
1066	if (noload)
1067	return;
1068
1069	/* trim the interface number off the end */
1070	strlcpy(ifname, name, sizeof(ifname));
1071	for (dp = ifname; *dp != 0; dp++)
1072	if (isdigit(*dp)) {
1073	*dp = 0;
1074	break;
1075	}
1076
1077	/* turn interface and unit into module name */
1078	strcpy(ifkind, "if_");
1079	strlcpy(ifkind + MOD_PREFIX_LEN, ifname,
1080	sizeof(ifkind) - MOD_PREFIX_LEN);
1081
1082	/* scan files in kernel */
1083	mstat.version = sizeof(struct module_stat);
1084	for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) {
1085	/* scan modules in file */
1086	for (modid = kldfirstmod(fileid); modid > 0;
1087	modid = modfnext(modid)) {
1088	if (modstat(modid, &mstat) < 0)
1089	continue;
1090	/* strip bus name if present */
1091	if ((cp = strchr(mstat.name, '/')) != NULL) {
1092	cp++;
1093	} else {
1094	cp = mstat.name;
1095	}
1096	/* already loaded? */
1097	if (strncmp(ifname, cp, strlen(ifname) + 1) == 0 \|\|
1098	strncmp(ifkind, cp, strlen(ifkind) + 1) == 0)
1099	return;
1100	}
1101	}
1102
1103	/* not present, we should try to load it */
1104	kldload(ifkind);
1105	}
1106
1107	static struct cmd basic_cmds[] = {
1108	DEF_CMD("up", IFF_UP, setifflags),
1109	DEF_CMD("down", -IFF_UP, setifflags),
1110	DEF_CMD("arp", -IFF_NOARP, setifflags),
1111	DEF_CMD("-arp", IFF_NOARP, setifflags),
1112	DEF_CMD("debug", IFF_DEBUG, setifflags),
1113	DEF_CMD("-debug", -IFF_DEBUG, setifflags),
1114	DEF_CMD_ARG("description", setifdescr),
1115	DEF_CMD_ARG("descr", setifdescr),
1116	DEF_CMD("-description", 0, unsetifdescr),
1117	DEF_CMD("-descr", 0, unsetifdescr),
1118	DEF_CMD("promisc", IFF_PPROMISC, setifflags),
1119	DEF_CMD("-promisc", -IFF_PPROMISC, setifflags),
1120	DEF_CMD("add", IFF_UP, notealias),
1121	DEF_CMD("alias", IFF_UP, notealias),
1122	DEF_CMD("-alias", -IFF_UP, notealias),
1123	DEF_CMD("delete", -IFF_UP, notealias),
1124	DEF_CMD("remove", -IFF_UP, notealias),
1125	#ifdef notdef
1126	#define EN_SWABIPS 0x1000
1127	DEF_CMD("swabips", EN_SWABIPS, setifflags),
1128	DEF_CMD("-swabips", -EN_SWABIPS, setifflags),
1129	#endif
1130	DEF_CMD_ARG("netmask", setifnetmask),
1131	DEF_CMD_ARG("metric", setifmetric),
1132	DEF_CMD_ARG("broadcast", setifbroadaddr),
1133	DEF_CMD_ARG("ipdst", setifipdst),
1134	DEF_CMD_ARG2("tunnel", settunnel),
1135	DEF_CMD("-tunnel", 0, deletetunnel),
1136	DEF_CMD("deletetunnel", 0, deletetunnel),
1137	DEF_CMD_ARG("vnet", setifvnet),
1138	DEF_CMD_ARG("-vnet", setifrvnet),
1139	DEF_CMD("link0", IFF_LINK0, setifflags),
1140	DEF_CMD("-link0", -IFF_LINK0, setifflags),
1141	DEF_CMD("link1", IFF_LINK1, setifflags),
1142	DEF_CMD("-link1", -IFF_LINK1, setifflags),
1143	DEF_CMD("link2", IFF_LINK2, setifflags),
1144	DEF_CMD("-link2", -IFF_LINK2, setifflags),
1145	DEF_CMD("monitor", IFF_MONITOR, setifflags),
1146	DEF_CMD("-monitor", -IFF_MONITOR, setifflags),
1147	DEF_CMD("staticarp", IFF_STATICARP, setifflags),
1148	DEF_CMD("-staticarp", -IFF_STATICARP, setifflags),
1149	DEF_CMD("rxcsum", IFCAP_RXCSUM, setifcap),
1150	DEF_CMD("-rxcsum", -IFCAP_RXCSUM, setifcap),
1151	DEF_CMD("txcsum", IFCAP_TXCSUM, setifcap),
1152	DEF_CMD("-txcsum", -IFCAP_TXCSUM, setifcap),
1153	DEF_CMD("netcons", IFCAP_NETCONS, setifcap),
1154	DEF_CMD("-netcons", -IFCAP_NETCONS, setifcap),
1155	DEF_CMD("polling", IFCAP_POLLING, setifcap),
1156	DEF_CMD("-polling", -IFCAP_POLLING, setifcap),
1157	DEF_CMD("tso", IFCAP_TSO, setifcap),
1158	DEF_CMD("-tso", -IFCAP_TSO, setifcap),
1159	DEF_CMD("lro", IFCAP_LRO, setifcap),
1160	DEF_CMD("-lro", -IFCAP_LRO, setifcap),
1161	DEF_CMD("wol", IFCAP_WOL, setifcap),
1162	DEF_CMD("-wol", -IFCAP_WOL, setifcap),
1163	DEF_CMD("wol_ucast", IFCAP_WOL_UCAST, setifcap),
1164	DEF_CMD("-wol_ucast", -IFCAP_WOL_UCAST, setifcap),
1165	DEF_CMD("wol_mcast", IFCAP_WOL_MCAST, setifcap),
1166	DEF_CMD("-wol_mcast", -IFCAP_WOL_MCAST, setifcap),
1167	DEF_CMD("wol_magic", IFCAP_WOL_MAGIC, setifcap),
1168	DEF_CMD("-wol_magic", -IFCAP_WOL_MAGIC, setifcap),
1169	DEF_CMD("normal", -IFF_LINK0, setifflags),
1170	DEF_CMD("compress", IFF_LINK0, setifflags),
1171	DEF_CMD("noicmp", IFF_LINK1, setifflags),
1172	DEF_CMD_ARG("mtu", setifmtu),
1173	DEF_CMD_ARG("name", setifname),
1174	};
1175
1176	static __constructor void
1177	ifconfig_ctor(void)
1178	{
1179	#define N(a) (sizeof(a) / sizeof(a[0]))
1180	size_t i;
1181
1182	for (i = 0; i < N(basic_cmds); i++)
1183	cmd_register(&basic_cmds[i]);
1184	#undef N
1185	}

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