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source: rtems-libbsd/freebsd-userspace/commands/sbin/ifconfig/ifconfig.c @ 25f7f0f

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

Last change on this file since 25f7f0f was 25f7f0f, checked in by Joel Sherrill <joel.sherrill@…>, on 10/23/12 at 15:57:30
ifconfig.c: Correct for getopt_r()
Property mode set to `100644`
File size: 30.1 KB

Line
1	#ifdef __rtems__
2	#define __need_getopt_newlib
3	#include <getopt.h>
4	#endif
5	/*
6	* Copyright (c) 1983, 1993
7	* The Regents of the University of California. All rights reserved.
8	*
9	* Redistribution and use in source and binary forms, with or without
10	* modification, are permitted provided that the following conditions
11	* are met:
12	* 1. Redistributions of source code must retain the above copyright
13	* notice, this list of conditions and the following disclaimer.
14	* 2. Redistributions in binary form must reproduce the above copyright
15	* notice, this list of conditions and the following disclaimer in the
16	* documentation and/or other materials provided with the distribution.
17	* 4. Neither the name of the University nor the names of its contributors
18	* may be used to endorse or promote products derived from this software
19	* without specific prior written permission.
20	*
21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31	* SUCH DAMAGE.
32	*/
33
34	#ifndef lint
35	static const char copyright[] =
36	"@(#) Copyright (c) 1983, 1993\n\
37	The Regents of the University of California. All rights reserved.\n";
38	#endif /* not lint */
39
40	#ifndef lint
41	#if 0
42	static char sccsid[] = "@(#)ifconfig.c 8.2 (Berkeley) 2/16/94";
43	#endif
44	static const char rcsid[] =
45	"$FreeBSD$";
46	#endif /* not lint */
47
48	#include <sys/param.h>
49	#include <sys/ioctl.h>
50	#include <sys/socket.h>
51	#include <sys/time.h>
52	#ifdef __rtems__
53	#include <freebsd/sys/module.h>
54	#include <freebsd/sys/linker.h>
55	#else
56	#include <sys/module.h>
57	#include <sys/linker.h>
58	#endif
59
60	#include <net/ethernet.h>
61	#include <net/if.h>
62	#ifdef __rtems__
63	#include <freebsd/net/if_var.h>
64	#else
65	#include <net/if_var.h>
66	#endif
67	#include <net/if_dl.h>
68	#include <net/if_types.h>
69	#include <net/route.h>
70
71	/* IP */
72	#include <netinet/in.h>
73	#ifdef __rtems__
74	#include <freebsd/netinet/in_var.h>
75	#else
76	#include <netinet/in_var.h>
77	#endif
78	#include <arpa/inet.h>
79	#include <netdb.h>
80
81	#include <ifaddrs.h>
82	#include <ctype.h>
83	#include <err.h>
84	#include <errno.h>
85	#include <fcntl.h>
86
87	#ifndef __rtems__
88	#include <jail.h>
89	#endif
90
91	#include <stdio.h>
92	#include <stdlib.h>
93	#include <string.h>
94	#include <unistd.h>
95
96	#include "ifconfig.h"
97
98	/*
99	* Since "struct ifreq" is composed of various union members, callers
100	* should pay special attention to interprete the value.
101	* (.e.g. little/big endian difference in the structure.)
102	*/
103	struct ifreq ifr;
104
105	char name[IFNAMSIZ];
106	char *descr = NULL;
107	size_t descrlen = 64;
108	int setaddr;
109	int setmask;
110	int doalias;
111	int clearaddr;
112	int newaddr = 1;
113	int verbose;
114	int noload;
115
116	int supmedia = 0;
117	int printkeys = 0; /* Print keying material for interfaces. */
118
119	static int ifconfig(int argc, char const argv, int iscreate,
120	const struct afswtch *afp);
121	static void status(const struct afswtch afp, const struct sockaddr_dl sdl,
122	struct ifaddrs *ifa);
123	static void tunnel_status(int s);
124	static void usage(void);
125
126	static struct afswtch af_getbyname(const char name);
127	static struct afswtch *af_getbyfamily(int af);
128	static void af_other_status(int);
129
130	#ifdef __rtems__
131	static int main_ifconfig(int argc, char *argv[]);
132	static int rtems_shell_main_ifconfig(int argc, char *argv[])
133	{
134	rtems_shell_globals_t ifconfig_globals;
135	rtems_shell_globals = &ifconfig_globals;
136	memset (rtems_shell_globals, 0, sizeof (ifconfig_globals));
137	descr = NULL;
138	descrlen = 64;
139	newaddr = 1;
140	supmedia = 0;
141	printkeys = 0;
142	ifconfig_globals.exit_code = 1;
143	if (setjmp (ifconfig_globals.exit_jmp) == 0)
144	return main_ifconfig ( argc, argv);
145	return ifconfig_globals.exit_code;
146	}
147	#endif
148
149	#ifdef __rtems__
150	static struct ifconfig_option *opts = NULL;
151
152	void
153	opt_register(struct ifconfig_option *p)
154	{
155	p->next = opts;
156	opts = p;
157	}
158	#else
159	static struct option *opts = NULL;
160
161	void
162	opt_register(struct option *p)
163	{
164	p->next = opts;
165	opts = p;
166	}
167	#endif
168
169	static void
170	usage(void)
171	{
172	char options[1024];
173	#ifdef __rtems__
174	struct ifconfig_option *p;
175	#else
176	struct option *p;
177	#endif
178
179	/* XXX not right but close enough for now */
180	options[0] = '\0';
181	for (p = opts; p != NULL; p = p->next) {
182	strlcat(options, p->opt_usage, sizeof(options));
183	strlcat(options, " ", sizeof(options));
184	}
185
186	fprintf(stderr,
187	"usage: ifconfig %sinterface address_family [address [dest_address]]\n"
188	" [parameters]\n"
189	" ifconfig interface create\n"
190	" ifconfig -a %s[-d] [-m] [-u] [-v] [address_family]\n"
191	" ifconfig -l [-d] [-u] [address_family]\n"
192	" ifconfig %s[-d] [-m] [-u] [-v]\n",
193	options, options, options);
194	exit(1);
195	}
196
197	#ifdef __rtems__
198	int
199	main_ifconfig(int argc, char *argv[])
200	#else
201	int
202	main(int argc, char *argv[])
203	#endif
204	{
205	int c, all, namesonly, downonly, uponly;
206	const struct afswtch *afp = NULL;
207	int ifindex;
208	struct ifaddrs ifap, ifa;
209	struct ifreq paifr;
210	const struct sockaddr_dl *sdl;
211	char options[1024], *cp;
212	const char *ifname;
213	#ifdef __rtems__
214	struct ifconfig_option *p;
215	#else
216	struct option *p;
217	#endif
218	size_t iflen;
219	#ifdef __rtems__
220	struct getopt_data getopt_reent;
221	#define optind getopt_reent.optind
222	#define optarg getopt_reent.optarg
223	#define opterr getopt_reent.opterr
224	#define optopt getopt_reent.optopt
225	#endif
226
227	all = downonly = uponly = namesonly = noload = verbose = 0;
228
229	/* Parse leading line options */
230	strlcpy(options, "adklmnuv", sizeof(options));
231	for (p = opts; p != NULL; p = p->next)
232	strlcat(options, p->opt, sizeof(options));
233	#ifdef __rtems__
234	memset(&getopt_reent, 0, sizeof(getopt_data));
235	while ((c = getopt_r(argc, argv, options, &getopt_reent)) != -1) {
236	#else
237	while ((c = getopt(argc, argv, options)) != -1) {
238	#endif
239	switch (c) {
240	case 'a': /* scan all interfaces */
241	all++;
242	break;
243	case 'd': /* restrict scan to "down" interfaces */
244	downonly++;
245	break;
246	case 'k':
247	printkeys++;
248	break;
249	case 'l': /* scan interface names only */
250	namesonly++;
251	break;
252	case 'm': /* show media choices in status */
253	supmedia = 1;
254	break;
255	case 'n': /* suppress module loading */
256	noload++;
257	break;
258	case 'u': /* restrict scan to "up" interfaces */
259	uponly++;
260	break;
261	case 'v':
262	verbose++;
263	break;
264	default:
265	for (p = opts; p != NULL; p = p->next)
266	if (p->opt[0] == c) {
267	p->cb(optarg);
268	break;
269	}
270	if (p == NULL)
271	usage();
272	break;
273	}
274	}
275	argc -= optind;
276	argv += optind;
277
278	/* -l cannot be used with -a or -m */
279	if (namesonly && (all \|\| supmedia))
280	usage();
281
282	/* nonsense.. */
283	if (uponly && downonly)
284	usage();
285
286	/* no arguments is equivalent to '-a' */
287	if (!namesonly && argc < 1)
288	all = 1;
289
290	/* -a and -l allow an address family arg to limit the output */
291	if (all \|\| namesonly) {
292	if (argc > 1)
293	usage();
294
295	ifname = NULL;
296	ifindex = 0;
297	if (argc == 1) {
298	afp = af_getbyname(*argv);
299	if (afp == NULL)
300	usage();
301	if (afp->af_name != NULL)
302	argc--, argv++;
303	/* leave with afp non-zero */
304	}
305	} else {
306	/* not listing, need an argument */
307	if (argc < 1)
308	usage();
309
310	ifname = *argv;
311	argc--, argv++;
312
313	/* check and maybe load support for this interface */
314	ifmaybeload(ifname);
315
316	ifindex = if_nametoindex(ifname);
317	if (ifindex == 0) {
318	/*
319	* NOTE: We must special-case the `create' command
320	* right here as we would otherwise fail when trying
321	* to find the interface.
322	*/
323	if (argc > 0 && (strcmp(argv[0], "create") == 0 \|\|
324	strcmp(argv[0], "plumb") == 0)) {
325	iflen = strlcpy(name, ifname, sizeof(name));
326	if (iflen >= sizeof(name))
327	errx(1, "%s: cloning name too long",
328	ifname);
329	ifconfig(argc, argv, 1, NULL);
330	exit(0);
331	}
332	/*
333	* NOTE: We have to special-case the `-vnet' command
334	* right here as we would otherwise fail when trying
335	* to find the interface as it lives in another vnet.
336	*/
337	if (argc > 0 && (strcmp(argv[0], "-vnet") == 0)) {
338	iflen = strlcpy(name, ifname, sizeof(name));
339	if (iflen >= sizeof(name))
340	errx(1, "%s: interface name too long",
341	ifname);
342	ifconfig(argc, argv, 0, NULL);
343	exit(0);
344	}
345	errx(1, "interface %s does not exist", ifname);
346	}
347	}
348
349	/* Check for address family */
350	if (argc > 0) {
351	afp = af_getbyname(*argv);
352	if (afp != NULL)
353	argc--, argv++;
354	}
355
356	if (getifaddrs(&ifap) != 0)
357	err(EXIT_FAILURE, "getifaddrs");
358	cp = NULL;
359	ifindex = 0;
360	for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
361	memset(&paifr, 0, sizeof(paifr));
362	strncpy(paifr.ifr_name, ifa->ifa_name, sizeof(paifr.ifr_name));
363	if (sizeof(paifr.ifr_addr) >= ifa->ifa_addr->sa_len) {
364	memcpy(&paifr.ifr_addr, ifa->ifa_addr,
365	ifa->ifa_addr->sa_len);
366	}
367
368	if (ifname != NULL && strcmp(ifname, ifa->ifa_name) != 0)
369	continue;
370	if (ifa->ifa_addr->sa_family == AF_LINK)
371	sdl = (const struct sockaddr_dl *) ifa->ifa_addr;
372	else
373	sdl = NULL;
374	if (cp != NULL && strcmp(cp, ifa->ifa_name) == 0)
375	continue;
376	iflen = strlcpy(name, ifa->ifa_name, sizeof(name));
377	if (iflen >= sizeof(name)) {
378	warnx("%s: interface name too long, skipping",
379	ifa->ifa_name);
380	continue;
381	}
382	cp = ifa->ifa_name;
383
384	if (downonly && (ifa->ifa_flags & IFF_UP) != 0)
385	continue;
386	if (uponly && (ifa->ifa_flags & IFF_UP) == 0)
387	continue;
388	ifindex++;
389	/*
390	* Are we just listing the interfaces?
391	*/
392	if (namesonly) {
393	if (ifindex > 1)
394	printf(" ");
395	fputs(name, stdout);
396	continue;
397	}
398
399	if (argc > 0)
400	ifconfig(argc, argv, 0, afp);
401	else
402	status(afp, sdl, ifa);
403	}
404	if (namesonly)
405	printf("\n");
406	freeifaddrs(ifap);
407
408	exit(0);
409	}
410
411	static struct afswtch *afs = NULL;
412
413	void
414	af_register(struct afswtch *p)
415	{
416	p->af_next = afs;
417	afs = p;
418	}
419
420	static struct afswtch *
421	af_getbyname(const char *name)
422	{
423	struct afswtch *afp;
424
425	for (afp = afs; afp != NULL; afp = afp->af_next)
426	if (strcmp(afp->af_name, name) == 0)
427	return afp;
428	return NULL;
429	}
430
431	static struct afswtch *
432	af_getbyfamily(int af)
433	{
434	struct afswtch *afp;
435
436	for (afp = afs; afp != NULL; afp = afp->af_next)
437	if (afp->af_af == af)
438	return afp;
439	return NULL;
440	}
441
442	static void
443	af_other_status(int s)
444	{
445	struct afswtch *afp;
446	uint8_t afmask[howmany(AF_MAX, NBBY)];
447
448	memset(afmask, 0, sizeof(afmask));
449	for (afp = afs; afp != NULL; afp = afp->af_next) {
450	if (afp->af_other_status == NULL)
451	continue;
452	if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af))
453	continue;
454	afp->af_other_status(s);
455	setbit(afmask, afp->af_af);
456	}
457	}
458
459	static void
460	af_all_tunnel_status(int s)
461	{
462	struct afswtch *afp;
463	uint8_t afmask[howmany(AF_MAX, NBBY)];
464
465	memset(afmask, 0, sizeof(afmask));
466	for (afp = afs; afp != NULL; afp = afp->af_next) {
467	if (afp->af_status_tunnel == NULL)
468	continue;
469	if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af))
470	continue;
471	afp->af_status_tunnel(s);
472	setbit(afmask, afp->af_af);
473	}
474	}
475
476	static struct cmd *cmds = NULL;
477
478	void
479	cmd_register(struct cmd *p)
480	{
481	p->c_next = cmds;
482	cmds = p;
483	}
484
485	static const struct cmd *
486	cmd_lookup(const char *name, int iscreate)
487	{
488	#define N(a) (sizeof(a)/sizeof(a[0]))
489	const struct cmd *p;
490
491	for (p = cmds; p != NULL; p = p->c_next)
492	if (strcmp(name, p->c_name) == 0) {
493	if (iscreate) {
494	if (p->c_iscloneop)
495	return p;
496	} else {
497	if (!p->c_iscloneop)
498	return p;
499	}
500	}
501	return NULL;
502	#undef N
503	}
504
505	struct callback {
506	callback_func *cb_func;
507	void *cb_arg;
508	struct callback *cb_next;
509	};
510	static struct callback *callbacks = NULL;
511
512	void
513	callback_register(callback_func func, void arg)
514	{
515	struct callback *cb;
516
517	cb = malloc(sizeof(struct callback));
518	if (cb == NULL)
519	errx(1, "unable to allocate memory for callback");
520	cb->cb_func = func;
521	cb->cb_arg = arg;
522	cb->cb_next = callbacks;
523	callbacks = cb;
524	}
525
526	/* specially-handled commands */
527	static void setifaddr(const char , int, int, const struct afswtch );
528	static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr);
529
530	static void setifdstaddr(const char , int, int, const struct afswtch );
531	static const struct cmd setifdstaddr_cmd =
532	DEF_CMD("ifdstaddr", 0, setifdstaddr);
533
534	static int
535	ifconfig(int argc, char const argv, int iscreate, const struct afswtch *uafp)
536	{
537	const struct afswtch afp, nafp;
538	const struct cmd *p;
539	struct callback *cb;
540	int s;
541
542	strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
543	afp = uafp != NULL ? uafp : af_getbyname("inet");
544	top:
545	ifr.ifr_addr.sa_family =
546	afp->af_af == AF_LINK \|\| afp->af_af == AF_UNSPEC ?
547	AF_LOCAL : afp->af_af;
548
549	if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0 &&
550	(uafp != NULL \|\| errno != EPROTONOSUPPORT \|\|
551	(s = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0))
552	err(1, "socket(family %u,SOCK_DGRAM", ifr.ifr_addr.sa_family);
553
554	while (argc > 0) {
555	p = cmd_lookup(*argv, iscreate);
556	if (iscreate && p == NULL) {
557	/*
558	* Push the clone create callback so the new
559	* device is created and can be used for any
560	* remaining arguments.
561	*/
562	cb = callbacks;
563	if (cb == NULL)
564	errx(1, "internal error, no callback");
565	callbacks = cb->cb_next;
566	cb->cb_func(s, cb->cb_arg);
567	iscreate = 0;
568	/*
569	* Handle any address family spec that
570	* immediately follows and potentially
571	* recreate the socket.
572	*/
573	nafp = af_getbyname(*argv);
574	if (nafp != NULL) {
575	argc--, argv++;
576	if (nafp != afp) {
577	close(s);
578	afp = nafp;
579	goto top;
580	}
581	}
582	/*
583	* Look for a normal parameter.
584	*/
585	continue;
586	}
587	if (p == NULL) {
588	/*
589	* Not a recognized command, choose between setting
590	* the interface address and the dst address.
591	*/
592	p = (setaddr ? &setifdstaddr_cmd : &setifaddr_cmd);
593	}
594	if (p->c_u.c_func \|\| p->c_u.c_func2) {
595	if (p->c_parameter == NEXTARG) {
596	if (argv[1] == NULL)
597	errx(1, "'%s' requires argument",
598	p->c_name);
599	p->c_u.c_func(argv[1], 0, s, afp);
600	argc--, argv++;
601	} else if (p->c_parameter == OPTARG) {
602	p->c_u.c_func(argv[1], 0, s, afp);
603	if (argv[1] != NULL)
604	argc--, argv++;
605	} else if (p->c_parameter == NEXTARG2) {
606	if (argc < 3)
607	errx(1, "'%s' requires 2 arguments",
608	p->c_name);
609	p->c_u.c_func2(argv[1], argv[2], s, afp);
610	argc -= 2, argv += 2;
611	} else
612	p->c_u.c_func(*argv, p->c_parameter, s, afp);
613	}
614	argc--, argv++;
615	}
616
617	/*
618	* Do any post argument processing required by the address family.
619	*/
620	if (afp->af_postproc != NULL)
621	afp->af_postproc(s, afp);
622	/*
623	* Do deferred callbacks registered while processing
624	* command-line arguments.
625	*/
626	for (cb = callbacks; cb != NULL; cb = cb->cb_next)
627	cb->cb_func(s, cb->cb_arg);
628	/*
629	* Do deferred operations.
630	*/
631	if (clearaddr) {
632	if (afp->af_ridreq == NULL \|\| afp->af_difaddr == 0) {
633	warnx("interface %s cannot change %s addresses!",
634	name, afp->af_name);
635	clearaddr = 0;
636	}
637	}
638	if (clearaddr) {
639	int ret;
640	strncpy(afp->af_ridreq, name, sizeof ifr.ifr_name);
641	ret = ioctl(s, afp->af_difaddr, afp->af_ridreq);
642	if (ret < 0) {
643	if (errno == EADDRNOTAVAIL && (doalias >= 0)) {
644	/* means no previous address for interface */
645	} else
646	Perror("ioctl (SIOCDIFADDR)");
647	}
648	}
649	if (newaddr) {
650	if (afp->af_addreq == NULL \|\| afp->af_aifaddr == 0) {
651	warnx("interface %s cannot change %s addresses!",
652	name, afp->af_name);
653	newaddr = 0;
654	}
655	}
656	if (newaddr && (setaddr \|\| setmask)) {
657	strncpy(afp->af_addreq, name, sizeof ifr.ifr_name);
658	if (ioctl(s, afp->af_aifaddr, afp->af_addreq) < 0)
659	Perror("ioctl (SIOCAIFADDR)");
660	}
661
662	close(s);
663	return(0);
664	}
665
666	/ARGSUSED/
667	static void
668	setifaddr(const char addr, int param, int s, const struct afswtch afp)
669	{
670	if (afp->af_getaddr == NULL)
671	return;
672	/*
673	* Delay the ioctl to set the interface addr until flags are all set.
674	* The address interpretation may depend on the flags,
675	* and the flags may change when the address is set.
676	*/
677	setaddr++;
678	if (doalias == 0 && afp->af_af != AF_LINK)
679	clearaddr = 1;
680	afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR));
681	}
682
683	static void
684	settunnel(const char src, const char dst, int s, const struct afswtch *afp)
685	{
686	struct addrinfo srcres, dstres;
687	int ecode;
688
689	if (afp->af_settunnel == NULL) {
690	warn("address family %s does not support tunnel setup",
691	afp->af_name);
692	return;
693	}
694
695	if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0)
696	errx(1, "error in parsing address string: %s",
697	gai_strerror(ecode));
698
699	if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0)
700	errx(1, "error in parsing address string: %s",
701	gai_strerror(ecode));
702
703	if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family)
704	errx(1,
705	"source and destination address families do not match");
706
707	afp->af_settunnel(s, srcres, dstres);
708
709	freeaddrinfo(srcres);
710	freeaddrinfo(dstres);
711	}
712
713	/* ARGSUSED */
714	static void
715	deletetunnel(const char vname, int param, int s, const struct afswtch afp)
716	{
717
718	if (ioctl(s, SIOCDIFPHYADDR, &ifr) < 0)
719	err(1, "SIOCDIFPHYADDR");
720	}
721
722	static void
723	setifvnet(const char *jname, int dummy __unused, int s,
724	const struct afswtch *afp)
725	{
726	struct ifreq my_ifr;
727
728	memcpy(&my_ifr, &ifr, sizeof(my_ifr));
729	#ifndef __rtems__
730	my_ifr.ifr_jid = jail_getid(jname);
731	if (my_ifr.ifr_jid < 0)
732	errx(1, "%s", jail_errmsg);
733	#endif
734	if (ioctl(s, SIOCSIFVNET, &my_ifr) < 0)
735	err(1, "SIOCSIFVNET");
736	}
737
738	static void
739	setifrvnet(const char *jname, int dummy __unused, int s,
740	const struct afswtch *afp)
741	{
742	struct ifreq my_ifr;
743
744	memcpy(&my_ifr, &ifr, sizeof(my_ifr));
745	#ifndef __rtems__
746	my_ifr.ifr_jid = jail_getid(jname);
747	if (my_ifr.ifr_jid < 0)
748	errx(1, "%s", jail_errmsg);
749	#endif
750	if (ioctl(s, SIOCSIFRVNET, &my_ifr) < 0)
751	err(1, "SIOCSIFRVNET(%d, %s)", my_ifr.ifr_jid, my_ifr.ifr_name);
752	}
753
754	static void
755	setifnetmask(const char *addr, int dummy __unused, int s,
756	const struct afswtch *afp)
757	{
758	if (afp->af_getaddr != NULL) {
759	setmask++;
760	afp->af_getaddr(addr, MASK);
761	}
762	}
763
764	static void
765	setifbroadaddr(const char *addr, int dummy __unused, int s,
766	const struct afswtch *afp)
767	{
768	if (afp->af_getaddr != NULL)
769	afp->af_getaddr(addr, DSTADDR);
770	}
771
772	static void
773	setifipdst(const char *addr, int dummy __unused, int s,
774	const struct afswtch *afp)
775	{
776	const struct afswtch *inet;
777
778	inet = af_getbyname("inet");
779	if (inet == NULL)
780	return;
781	inet->af_getaddr(addr, DSTADDR);
782	clearaddr = 0;
783	newaddr = 0;
784	}
785
786	static void
787	notealias(const char addr, int param, int s, const struct afswtch afp)
788	{
789	#define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr))
790	if (setaddr && doalias == 0 && param < 0)
791	if (afp->af_addreq != NULL && afp->af_ridreq != NULL)
792	bcopy((caddr_t)rqtosa(af_addreq),
793	(caddr_t)rqtosa(af_ridreq),
794	rqtosa(af_addreq)->sa_len);
795	doalias = param;
796	if (param < 0) {
797	clearaddr = 1;
798	newaddr = 0;
799	} else
800	clearaddr = 0;
801	#undef rqtosa
802	}
803
804	/ARGSUSED/
805	static void
806	setifdstaddr(const char *addr, int param __unused, int s,
807	const struct afswtch *afp)
808	{
809	if (afp->af_getaddr != NULL)
810	afp->af_getaddr(addr, DSTADDR);
811	}
812
813	/*
814	* Note: doing an SIOCIGIFFLAGS scribbles on the union portion
815	* of the ifreq structure, which may confuse other parts of ifconfig.
816	* Make a private copy so we can avoid that.
817	*/
818	static void
819	setifflags(const char vname, int value, int s, const struct afswtch afp)
820	{
821	struct ifreq my_ifr;
822	int flags;
823
824	memset(&my_ifr, 0, sizeof(my_ifr));
825	(void) strlcpy(my_ifr.ifr_name, name, sizeof(my_ifr.ifr_name));
826
827	if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) {
828	Perror("ioctl (SIOCGIFFLAGS)");
829	exit(1);
830	}
831	flags = (my_ifr.ifr_flags & 0xffff) \| (my_ifr.ifr_flagshigh << 16);
832
833	if (value < 0) {
834	value = -value;
835	flags &= ~value;
836	} else
837	flags \|= value;
838	my_ifr.ifr_flags = flags & 0xffff;
839	my_ifr.ifr_flagshigh = flags >> 16;
840	if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0)
841	Perror(vname);
842	}
843
844	void
845	setifcap(const char vname, int value, int s, const struct afswtch afp)
846	{
847	int flags;
848
849	if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) < 0) {
850	Perror("ioctl (SIOCGIFCAP)");
851	exit(1);
852	}
853	flags = ifr.ifr_curcap;
854	if (value < 0) {
855	value = -value;
856	flags &= ~value;
857	} else
858	flags \|= value;
859	flags &= ifr.ifr_reqcap;
860	ifr.ifr_reqcap = flags;
861	if (ioctl(s, SIOCSIFCAP, (caddr_t)&ifr) < 0)
862	Perror(vname);
863	}
864
865	static void
866	setifmetric(const char *val, int dummy __unused, int s,
867	const struct afswtch *afp)
868	{
869	strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
870	ifr.ifr_metric = atoi(val);
871	if (ioctl(s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0)
872	warn("ioctl (set metric)");
873	}
874
875	static void
876	setifmtu(const char *val, int dummy __unused, int s,
877	const struct afswtch *afp)
878	{
879	strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
880	ifr.ifr_mtu = atoi(val);
881	if (ioctl(s, SIOCSIFMTU, (caddr_t)&ifr) < 0)
882	warn("ioctl (set mtu)");
883	}
884
885	static void
886	setifname(const char *val, int dummy __unused, int s,
887	const struct afswtch *afp)
888	{
889	char *newname;
890
891	newname = strdup(val);
892	if (newname == NULL) {
893	warn("no memory to set ifname");
894	return;
895	}
896	ifr.ifr_data = newname;
897	if (ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) {
898	warn("ioctl (set name)");
899	free(newname);
900	return;
901	}
902	strlcpy(name, newname, sizeof(name));
903	free(newname);
904	}
905
906	/* ARGSUSED */
907	static void
908	setifdescr(const char *val, int dummy __unused, int s,
909	const struct afswtch *afp)
910	{
911	char *newdescr;
912
913	ifr.ifr_buffer.length = strlen(val) + 1;
914	if (ifr.ifr_buffer.length == 1) {
915	ifr.ifr_buffer.buffer = newdescr = NULL;
916	ifr.ifr_buffer.length = 0;
917	} else {
918	newdescr = strdup(val);
919	ifr.ifr_buffer.buffer = newdescr;
920	if (newdescr == NULL) {
921	warn("no memory to set ifdescr");
922	return;
923	}
924	}
925
926	if (ioctl(s, SIOCSIFDESCR, (caddr_t)&ifr) < 0)
927	warn("ioctl (set descr)");
928
929	free(newdescr);
930	}
931
932	/* ARGSUSED */
933	static void
934	unsetifdescr(const char val, int value, int s, const struct afswtch afp)
935	{
936
937	setifdescr("", 0, s, 0);
938	}
939
940	#define IFFBITS \
941	"\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6SMART\7RUNNING" \
942	"\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2" \
943	"\20MULTICAST\22PPROMISC\23MONITOR\24STATICARP"
944
945	#define IFCAPBITS \
946	"\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7POLLING" \
947	"\10VLAN_HWCSUM\11TSO4\12TSO6\13LRO\14WOL_UCAST\15WOL_MCAST\16WOL_MAGIC" \
948	"\21VLAN_HWFILTER\23VLAN_HWTSO\24LINKSTATE"
949
950	/*
951	* Print the status of the interface. If an address family was
952	* specified, show only it; otherwise, show them all.
953	*/
954	static void
955	status(const struct afswtch afp, const struct sockaddr_dl sdl,
956	struct ifaddrs *ifa)
957	{
958	struct ifaddrs *ift;
959	int allfamilies, s;
960	struct ifstat ifs;
961
962	if (afp == NULL) {
963	allfamilies = 1;
964	ifr.ifr_addr.sa_family = AF_LOCAL;
965	} else {
966	allfamilies = 0;
967	ifr.ifr_addr.sa_family =
968	afp->af_af == AF_LINK ? AF_LOCAL : afp->af_af;
969	}
970	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
971
972	s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0);
973	if (s < 0)
974	err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family);
975
976	printf("%s: ", name);
977	printb("flags", ifa->ifa_flags, IFFBITS);
978	if (ioctl(s, SIOCGIFMETRIC, &ifr) != -1)
979	printf(" metric %d", ifr.ifr_metric);
980	if (ioctl(s, SIOCGIFMTU, &ifr) != -1)
981	printf(" mtu %d", ifr.ifr_mtu);
982	putchar('\n');
983
984	for (;;) {
985	if ((descr = reallocf(descr, descrlen)) != NULL) {
986	ifr.ifr_buffer.buffer = descr;
987	ifr.ifr_buffer.length = descrlen;
988	if (ioctl(s, SIOCGIFDESCR, &ifr) == 0) {
989	if (ifr.ifr_buffer.buffer == descr) {
990	if (strlen(descr) > 0)
991	printf("\tdescription: %s\n",
992	descr);
993	} else if (ifr.ifr_buffer.length > descrlen) {
994	descrlen = ifr.ifr_buffer.length;
995	continue;
996	}
997	}
998	} else
999	warn("unable to allocate memory for interface"
1000	"description");
1001	break;
1002	}
1003
1004	if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) == 0) {
1005	if (ifr.ifr_curcap != 0) {
1006	printb("\toptions", ifr.ifr_curcap, IFCAPBITS);
1007	putchar('\n');
1008	}
1009	if (supmedia && ifr.ifr_reqcap != 0) {
1010	printb("\tcapabilities", ifr.ifr_reqcap, IFCAPBITS);
1011	putchar('\n');
1012	}
1013	}
1014
1015	tunnel_status(s);
1016
1017	for (ift = ifa; ift != NULL; ift = ift->ifa_next) {
1018	if (ift->ifa_addr == NULL)
1019	continue;
1020	if (strcmp(ifa->ifa_name, ift->ifa_name) != 0)
1021	continue;
1022	if (allfamilies) {
1023	const struct afswtch *p;
1024	p = af_getbyfamily(ift->ifa_addr->sa_family);
1025	if (p != NULL && p->af_status != NULL)
1026	p->af_status(s, ift);
1027	} else if (afp->af_af == ift->ifa_addr->sa_family)
1028	afp->af_status(s, ift);
1029	}
1030	#if 0
1031	if (allfamilies \|\| afp->af_af == AF_LINK) {
1032	const struct afswtch *lafp;
1033
1034	/*
1035	* Hack; the link level address is received separately
1036	* from the routing information so any address is not
1037	* handled above. Cobble together an entry and invoke
1038	* the status method specially.
1039	*/
1040	lafp = af_getbyname("lladdr");
1041	if (lafp != NULL) {
1042	info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl;
1043	lafp->af_status(s, &info);
1044	}
1045	}
1046	#endif
1047	if (allfamilies)
1048	af_other_status(s);
1049	else if (afp->af_other_status != NULL)
1050	afp->af_other_status(s);
1051
1052	strncpy(ifs.ifs_name, name, sizeof ifs.ifs_name);
1053	if (ioctl(s, SIOCGIFSTATUS, &ifs) == 0)
1054	printf("%s", ifs.ascii);
1055
1056	close(s);
1057	return;
1058	}
1059
1060	static void
1061	tunnel_status(int s)
1062	{
1063	af_all_tunnel_status(s);
1064	}
1065
1066	void
1067	Perror(const char *cmd)
1068	{
1069	switch (errno) {
1070
1071	case ENXIO:
1072	errx(1, "%s: no such interface", cmd);
1073	break;
1074
1075	case EPERM:
1076	errx(1, "%s: permission denied", cmd);
1077	break;
1078
1079	default:
1080	err(1, "%s", cmd);
1081	}
1082	}
1083
1084	/*
1085	* Print a value a la the %b format of the kernel's printf
1086	*/
1087	void
1088	printb(const char s, unsigned v, const char bits)
1089	{
1090	int i, any = 0;
1091	char c;
1092
1093	if (bits && *bits == 8)
1094	printf("%s=%o", s, v);
1095	else
1096	printf("%s=%x", s, v);
1097	bits++;
1098	if (bits) {
1099	putchar('<');
1100	while ((i = *bits++) != '\0') {
1101	if (v & (1 << (i-1))) {
1102	if (any)
1103	putchar(',');
1104	any = 1;
1105	for (; (c = *bits) > 32; bits++)
1106	putchar(c);
1107	} else
1108	for (; *bits > 32; bits++)
1109	;
1110	}
1111	putchar('>');
1112	}
1113	}
1114
1115	void
1116	ifmaybeload(const char *name)
1117	{
1118	#ifndef __rtems__
1119	#define MOD_PREFIX_LEN 3 /* "if_" */
1120	struct module_stat mstat;
1121	int fileid, modid;
1122	char ifkind[IFNAMSIZ + MOD_PREFIX_LEN], ifname[IFNAMSIZ], *dp;
1123	const char *cp;
1124
1125	/* loading suppressed by the user */
1126	if (noload)
1127	return;
1128
1129	/* trim the interface number off the end */
1130	strlcpy(ifname, name, sizeof(ifname));
1131	for (dp = ifname; *dp != 0; dp++)
1132	if (isdigit(*dp)) {
1133	*dp = 0;
1134	break;
1135	}
1136
1137	/* turn interface and unit into module name */
1138	strcpy(ifkind, "if_");
1139	strlcpy(ifkind + MOD_PREFIX_LEN, ifname,
1140	sizeof(ifkind) - MOD_PREFIX_LEN);
1141
1142	/* scan files in kernel */
1143	mstat.version = sizeof(struct module_stat);
1144	for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) {
1145	/* scan modules in file */
1146	for (modid = kldfirstmod(fileid); modid > 0;
1147	modid = modfnext(modid)) {
1148	if (modstat(modid, &mstat) < 0)
1149	continue;
1150	/* strip bus name if present */
1151	if ((cp = strchr(mstat.name, '/')) != NULL) {
1152	cp++;
1153	} else {
1154	cp = mstat.name;
1155	}
1156	/* already loaded? */
1157	if (strncmp(ifname, cp, strlen(ifname) + 1) == 0 \|\|
1158	strncmp(ifkind, cp, strlen(ifkind) + 1) == 0)
1159	return;
1160	}
1161	}
1162
1163	/* not present, we should try to load it */
1164	kldload(ifkind);
1165	#endif
1166	}
1167
1168	static struct cmd basic_cmds[] = {
1169	DEF_CMD("up", IFF_UP, setifflags),
1170	DEF_CMD("down", -IFF_UP, setifflags),
1171	DEF_CMD("arp", -IFF_NOARP, setifflags),
1172	DEF_CMD("-arp", IFF_NOARP, setifflags),
1173	DEF_CMD("debug", IFF_DEBUG, setifflags),
1174	DEF_CMD("-debug", -IFF_DEBUG, setifflags),
1175	DEF_CMD_ARG("description", setifdescr),
1176	DEF_CMD_ARG("descr", setifdescr),
1177	DEF_CMD("-description", 0, unsetifdescr),
1178	DEF_CMD("-descr", 0, unsetifdescr),
1179	DEF_CMD("promisc", IFF_PPROMISC, setifflags),
1180	DEF_CMD("-promisc", -IFF_PPROMISC, setifflags),
1181	DEF_CMD("add", IFF_UP, notealias),
1182	DEF_CMD("alias", IFF_UP, notealias),
1183	DEF_CMD("-alias", -IFF_UP, notealias),
1184	DEF_CMD("delete", -IFF_UP, notealias),
1185	DEF_CMD("remove", -IFF_UP, notealias),
1186	#ifdef notdef
1187	#define EN_SWABIPS 0x1000
1188	DEF_CMD("swabips", EN_SWABIPS, setifflags),
1189	DEF_CMD("-swabips", -EN_SWABIPS, setifflags),
1190	#endif
1191	DEF_CMD_ARG("netmask", setifnetmask),
1192	DEF_CMD_ARG("metric", setifmetric),
1193	DEF_CMD_ARG("broadcast", setifbroadaddr),
1194	DEF_CMD_ARG("ipdst", setifipdst),
1195	DEF_CMD_ARG2("tunnel", settunnel),
1196	DEF_CMD("-tunnel", 0, deletetunnel),
1197	DEF_CMD("deletetunnel", 0, deletetunnel),
1198	DEF_CMD_ARG("vnet", setifvnet),
1199	DEF_CMD_ARG("-vnet", setifrvnet),
1200	DEF_CMD("link0", IFF_LINK0, setifflags),
1201	DEF_CMD("-link0", -IFF_LINK0, setifflags),
1202	DEF_CMD("link1", IFF_LINK1, setifflags),
1203	DEF_CMD("-link1", -IFF_LINK1, setifflags),
1204	DEF_CMD("link2", IFF_LINK2, setifflags),
1205	DEF_CMD("-link2", -IFF_LINK2, setifflags),
1206	DEF_CMD("monitor", IFF_MONITOR, setifflags),
1207	DEF_CMD("-monitor", -IFF_MONITOR, setifflags),
1208	DEF_CMD("staticarp", IFF_STATICARP, setifflags),
1209	DEF_CMD("-staticarp", -IFF_STATICARP, setifflags),
1210	DEF_CMD("rxcsum", IFCAP_RXCSUM, setifcap),
1211	DEF_CMD("-rxcsum", -IFCAP_RXCSUM, setifcap),
1212	DEF_CMD("txcsum", IFCAP_TXCSUM, setifcap),
1213	DEF_CMD("-txcsum", -IFCAP_TXCSUM, setifcap),
1214	DEF_CMD("netcons", IFCAP_NETCONS, setifcap),
1215	DEF_CMD("-netcons", -IFCAP_NETCONS, setifcap),
1216	DEF_CMD("polling", IFCAP_POLLING, setifcap),
1217	DEF_CMD("-polling", -IFCAP_POLLING, setifcap),
1218	DEF_CMD("tso", IFCAP_TSO, setifcap),
1219	DEF_CMD("-tso", -IFCAP_TSO, setifcap),
1220	DEF_CMD("lro", IFCAP_LRO, setifcap),
1221	DEF_CMD("-lro", -IFCAP_LRO, setifcap),
1222	DEF_CMD("wol", IFCAP_WOL, setifcap),
1223	DEF_CMD("-wol", -IFCAP_WOL, setifcap),
1224	DEF_CMD("wol_ucast", IFCAP_WOL_UCAST, setifcap),
1225	DEF_CMD("-wol_ucast", -IFCAP_WOL_UCAST, setifcap),
1226	DEF_CMD("wol_mcast", IFCAP_WOL_MCAST, setifcap),
1227	DEF_CMD("-wol_mcast", -IFCAP_WOL_MCAST, setifcap),
1228	DEF_CMD("wol_magic", IFCAP_WOL_MAGIC, setifcap),
1229	DEF_CMD("-wol_magic", -IFCAP_WOL_MAGIC, setifcap),
1230	DEF_CMD("normal", -IFF_LINK0, setifflags),
1231	DEF_CMD("compress", IFF_LINK0, setifflags),
1232	DEF_CMD("noicmp", IFF_LINK1, setifflags),
1233	DEF_CMD_ARG("mtu", setifmtu),
1234	DEF_CMD_ARG("name", setifname),
1235	};
1236
1237	static __constructor void
1238	ifconfig_ctor(void)
1239	{
1240	#define N(a) (sizeof(a) / sizeof(a[0]))
1241	size_t i;
1242
1243	for (i = 0; i < N(basic_cmds); i++)
1244	cmd_register(&basic_cmds[i]);
1245	#undef N
1246	}
1247
1248	#ifdef __rtems__
1249	#include <rtems/shell.h>
1250
1251	rtems_shell_cmd_t rtems_shell_IFCONFIG_Command = {
1252	"ifconfig", /* name */
1253	"ifconfig [args]", /* usage */
1254	"net", /* topic */
1255	rtems_shell_main_ifconfig, /* command */
1256	NULL, /* alias */
1257	NULL /* next */
1258	};
1259	#endif

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