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#include <sys/param.h>
33#include <sys/ioctl.h>
34#ifdef JAIL
35#include <sys/jail.h>
36#endif
37#include <sys/module.h>
38#include <sys/linker.h>
39#include <sys/nv.h>
40#include <sys/queue.h>
41#include <sys/socket.h>
42#include <sys/time.h>
43
44#include <net/ethernet.h>
45#include <net/if.h>
46#include <net/if_dl.h>
47#include <net/if_strings.h>
48#include <net/if_types.h>
49#include <net/route.h>
50
51/* IP */
52#include <netinet/in.h>
53#include <netinet/in_var.h>
54#include <arpa/inet.h>
55#include <netdb.h>
56
57#include <fnmatch.h>
58#include <ifaddrs.h>
59#include <ctype.h>
60#include <err.h>
61#include <errno.h>
62#include <fcntl.h>
63#ifdef JAIL
64#include <jail.h>
65#endif
66#include <stdbool.h>
67#include <stdio.h>
68#include <stdlib.h>
69#include <string.h>
70#include <unistd.h>
71
72#include <libifconfig.h>
73
74#include "ifconfig.h"
75
76ifconfig_handle_t *lifh;
77
78#ifdef WITHOUT_NETLINK
79static char	*descr = NULL;
80static size_t	descrlen = 64;
81#endif
82static int	setaddr;
83static int	setmask;
84static int	doalias;
85static int	clearaddr;
86static int	newaddr = 1;
87
88int	exit_code = 0;
89
90static char ifname_to_print[IFNAMSIZ]; /* Helper for printifnamemaybe() */
91
92/* Formatter Strings */
93char	*f_inet, *f_inet6, *f_ether, *f_addr;
94
95#ifdef WITHOUT_NETLINK
96static void list_interfaces_ioctl(if_ctx *ctx);
97static	void status(if_ctx *ctx, const struct sockaddr_dl *sdl,
98		struct ifaddrs *ifa);
99#endif
100static _Noreturn void usage(void);
101static void Perrorc(const char *cmd, int error);
102
103static int getifflags(const char *ifname, int us, bool err_ok);
104
105static struct afswtch *af_getbyname(const char *name);
106
107static struct option *opts = NULL;
108
109struct ifa_order_elt {
110	int if_order;
111	int af_orders[255];
112	struct ifaddrs *ifa;
113	TAILQ_ENTRY(ifa_order_elt) link;
114};
115
116TAILQ_HEAD(ifa_queue, ifa_order_elt);
117
118static struct module_map_entry {
119	const char *ifname;
120	const char *kldname;
121} module_map[] = {
122	{
123		.ifname = "tun",
124		.kldname = "if_tuntap",
125	},
126	{
127		.ifname = "tap",
128		.kldname = "if_tuntap",
129	},
130	{
131		.ifname = "vmnet",
132		.kldname = "if_tuntap",
133	},
134	{
135		.ifname = "ipsec",
136		.kldname = "ipsec",
137	},
138	{
139		/*
140		 * This mapping exists because there is a conflicting enc module
141		 * in CAM.  ifconfig's guessing behavior will attempt to match
142		 * the ifname to a module as well as if_${ifname} and clash with
143		 * CAM enc.  This is an assertion of the correct module to load.
144		 */
145		.ifname = "enc",
146		.kldname = "if_enc",
147	},
148};
149
150
151void
152opt_register(struct option *p)
153{
154	p->next = opts;
155	opts = p;
156}
157
158static void
159usage(void)
160{
161	char options[1024];
162	struct option *p;
163
164	/* XXX not right but close enough for now */
165	options[0] = '\0';
166	for (p = opts; p != NULL; p = p->next) {
167		strlcat(options, p->opt_usage, sizeof(options));
168		strlcat(options, " ", sizeof(options));
169	}
170
171	fprintf(stderr,
172	"usage: ifconfig [-j jail] [-f type:format] %sinterface address_family\n"
173	"                [address [dest_address]] [parameters]\n"
174	"       ifconfig [-j jail] interface create\n"
175	"       ifconfig [-j jail] -a %s[-d] [-m] [-u] [-v] [address_family]\n"
176	"       ifconfig [-j jail] -l [-d] [-u] [address_family]\n"
177	"       ifconfig [-j jail] %s[-d] [-m] [-u] [-v]\n",
178		options, options, options);
179	exit(1);
180}
181
182static void
183ifname_update(if_ctx *ctx, const char *name)
184{
185	strlcpy(ctx->_ifname_storage_ioctl, name, sizeof(ctx->_ifname_storage_ioctl));
186	ctx->ifname = ctx->_ifname_storage_ioctl;
187
188	strlcpy(ifname_to_print, name, sizeof(ifname_to_print));
189}
190
191static void
192ifr_set_name(struct ifreq *ifr, const char *name)
193{
194	strlcpy(ifr->ifr_name, name, sizeof(ifr->ifr_name));
195}
196
197int
198ioctl_ctx_ifr(if_ctx *ctx, unsigned long cmd, struct ifreq *ifr)
199{
200	ifr_set_name(ifr, ctx->ifname);
201	return (ioctl_ctx(ctx, cmd, ifr));
202}
203
204void
205ifcreate_ioctl(if_ctx *ctx, struct ifreq *ifr)
206{
207	char ifname_orig[IFNAMSIZ];
208
209	strlcpy(ifname_orig, ifr->ifr_name, sizeof(ifname_orig));
210
211	if (ioctl(ctx->io_s, SIOCIFCREATE2, ifr) < 0) {
212		switch (errno) {
213		case EEXIST:
214			errx(1, "interface %s already exists", ifr->ifr_name);
215		default:
216			err(1, "SIOCIFCREATE2 (%s)", ifr->ifr_name);
217		}
218	}
219
220	if (strncmp(ifname_orig, ifr->ifr_name, sizeof(ifname_orig)) != 0)
221		ifname_update(ctx, ifr->ifr_name);
222}
223
224#ifdef WITHOUT_NETLINK
225static int
226calcorders(struct ifaddrs *ifa, struct ifa_queue *q)
227{
228	struct ifaddrs *prev;
229	struct ifa_order_elt *cur;
230	unsigned int ord, af, ifa_ord;
231
232	prev = NULL;
233	cur = NULL;
234	ord = 0;
235	ifa_ord = 0;
236
237	while (ifa != NULL) {
238		if (prev == NULL ||
239		    strcmp(ifa->ifa_name, prev->ifa_name) != 0) {
240			cur = calloc(1, sizeof(*cur));
241
242			if (cur == NULL)
243				return (-1);
244
245			TAILQ_INSERT_TAIL(q, cur, link);
246			cur->if_order = ifa_ord ++;
247			cur->ifa = ifa;
248			ord = 0;
249		}
250
251		if (ifa->ifa_addr) {
252			af = ifa->ifa_addr->sa_family;
253
254			if (af < nitems(cur->af_orders) &&
255			    cur->af_orders[af] == 0)
256				cur->af_orders[af] = ++ord;
257		}
258		prev = ifa;
259		ifa = ifa->ifa_next;
260	}
261
262	return (0);
263}
264
265static int
266cmpifaddrs(struct ifaddrs *a, struct ifaddrs *b, struct ifa_queue *q)
267{
268	struct ifa_order_elt *cur, *e1, *e2;
269	unsigned int af1, af2;
270	int ret;
271
272	e1 = e2 = NULL;
273
274	ret = strcmp(a->ifa_name, b->ifa_name);
275	if (ret != 0) {
276		TAILQ_FOREACH(cur, q, link) {
277			if (e1 && e2)
278				break;
279
280			if (strcmp(cur->ifa->ifa_name, a->ifa_name) == 0)
281				e1 = cur;
282			else if (strcmp(cur->ifa->ifa_name, b->ifa_name) == 0)
283				e2 = cur;
284		}
285
286		if (!e1 || !e2)
287			return (0);
288		else
289			return (e1->if_order - e2->if_order);
290
291	} else if (a->ifa_addr != NULL && b->ifa_addr != NULL) {
292		TAILQ_FOREACH(cur, q, link) {
293			if (strcmp(cur->ifa->ifa_name, a->ifa_name) == 0) {
294				e1 = cur;
295				break;
296			}
297		}
298
299		if (!e1)
300			return (0);
301
302		af1 = a->ifa_addr->sa_family;
303		af2 = b->ifa_addr->sa_family;
304
305		if (af1 < nitems(e1->af_orders) && af2 < nitems(e1->af_orders))
306			return (e1->af_orders[af1] - e1->af_orders[af2]);
307	}
308
309	return (0);
310}
311#endif
312
313static void freeformat(void)
314{
315
316	free(f_inet);
317	free(f_inet6);
318	free(f_ether);
319	free(f_addr);
320}
321
322static void setformat(char *input)
323{
324	char	*formatstr, *category, *modifier;
325
326	formatstr = strdup(input);
327	while ((category = strsep(&formatstr, ",")) != NULL) {
328		modifier = strchr(category, ':');
329		if (modifier == NULL) {
330			if (strcmp(category, "default") == 0) {
331				freeformat();
332			} else if (strcmp(category, "cidr") == 0) {
333				free(f_inet);
334				f_inet = strdup(category);
335				free(f_inet6);
336				f_inet6 = strdup(category);
337			} else {
338				warnx("Skipping invalid format: %s\n",
339				    category);
340			}
341			continue;
342		}
343
344		/* Split the string on the separator, then seek past it */
345		modifier[0] = '\0';
346		modifier++;
347
348		if (strcmp(category, "addr") == 0) {
349			free(f_addr);
350			f_addr = strdup(modifier);
351		} else if (strcmp(category, "ether") == 0) {
352			free(f_ether);
353			f_ether = strdup(modifier);
354		} else if (strcmp(category, "inet") == 0) {
355			free(f_inet);
356			f_inet = strdup(modifier);
357		} else if (strcmp(category, "inet6") == 0) {
358			free(f_inet6);
359			f_inet6 = strdup(modifier);
360		}
361	}
362	free(formatstr);
363}
364
365#ifdef WITHOUT_NETLINK
366static struct ifaddrs *
367sortifaddrs(struct ifaddrs *list,
368    int (*compare)(struct ifaddrs *, struct ifaddrs *, struct ifa_queue *),
369    struct ifa_queue *q)
370{
371	struct ifaddrs *right, *temp, *last, *result, *next, *tail;
372
373	right = list;
374	temp = list;
375	last = list;
376	result = NULL;
377	next = NULL;
378	tail = NULL;
379
380	if (!list || !list->ifa_next)
381		return (list);
382
383	while (temp && temp->ifa_next) {
384		last = right;
385		right = right->ifa_next;
386		temp = temp->ifa_next->ifa_next;
387	}
388
389	last->ifa_next = NULL;
390
391	list = sortifaddrs(list, compare, q);
392	right = sortifaddrs(right, compare, q);
393
394	while (list || right) {
395
396		if (!right) {
397			next = list;
398			list = list->ifa_next;
399		} else if (!list) {
400			next = right;
401			right = right->ifa_next;
402		} else if (compare(list, right, q) <= 0) {
403			next = list;
404			list = list->ifa_next;
405		} else {
406			next = right;
407			right = right->ifa_next;
408		}
409
410		if (!result)
411			result = next;
412		else
413			tail->ifa_next = next;
414
415		tail = next;
416	}
417
418	return (result);
419}
420#endif
421
422static void
423printifnamemaybe(void)
424{
425	if (ifname_to_print[0] != '\0')
426		printf("%s\n", ifname_to_print);
427}
428
429static void
430list_interfaces(if_ctx *ctx)
431{
432#ifdef WITHOUT_NETLINK
433	list_interfaces_ioctl(ctx);
434#else
435	list_interfaces_nl(ctx->args);
436#endif
437}
438
439static char *
440args_peek(struct ifconfig_args *args)
441{
442	if (args->argc > 0)
443		return (args->argv[0]);
444	return (NULL);
445}
446
447static char *
448args_pop(struct ifconfig_args *args)
449{
450	if (args->argc == 0)
451		return (NULL);
452
453	char *arg = args->argv[0];
454
455	args->argc--;
456	args->argv++;
457
458	return (arg);
459}
460
461static void
462args_parse(struct ifconfig_args *args, int argc, char *argv[])
463{
464	char options[1024];
465	struct option *p;
466	int c;
467
468	/* Parse leading line options */
469	strlcpy(options, "G:adDf:j:klmnuv", sizeof(options));
470	for (p = opts; p != NULL; p = p->next)
471		strlcat(options, p->opt, sizeof(options));
472	while ((c = getopt(argc, argv, options)) != -1) {
473		switch (c) {
474		case 'a':	/* scan all interfaces */
475			args->all = true;
476			break;
477		case 'd':	/* restrict scan to "down" interfaces */
478			args->downonly = true;
479			break;
480		case 'D':	/* Print driver name */
481			args->drivername = true;
482			break;
483		case 'f':
484			if (optarg == NULL)
485				usage();
486			setformat(optarg);
487			break;
488		case 'G':
489			if (optarg == NULL || args->all == 0)
490				usage();
491			args->nogroup = optarg;
492			break;
493		case 'j':
494#ifdef JAIL
495			if (optarg == NULL)
496				usage();
497			args->jail_name = optarg;
498#else
499			Perror("not built with jail support");
500#endif
501			break;
502		case 'k':
503			args->printkeys = true;
504			break;
505		case 'l':	/* scan interface names only */
506			args->namesonly = true;
507			break;
508		case 'm':	/* show media choices in status */
509			args->supmedia = true;
510			break;
511		case 'n':	/* suppress module loading */
512			args->noload = true;
513			break;
514		case 'u':	/* restrict scan to "up" interfaces */
515			args->uponly = true;
516			break;
517		case 'v':
518			args->verbose++;
519			break;
520		case 'g':
521			if (args->all) {
522				if (optarg == NULL)
523					usage();
524				args->matchgroup = optarg;
525				break;
526			}
527			/* FALLTHROUGH */
528		default:
529			for (p = opts; p != NULL; p = p->next)
530				if (p->opt[0] == c) {
531					p->cb(optarg);
532					break;
533				}
534			if (p == NULL)
535				usage();
536			break;
537		}
538	}
539	argc -= optind;
540	argv += optind;
541
542	/* -l cannot be used with -a or -m */
543	if (args->namesonly && (args->all || args->supmedia))
544		usage();
545
546	/* nonsense.. */
547	if (args->uponly && args->downonly)
548		usage();
549
550	/* no arguments is equivalent to '-a' */
551	if (!args->namesonly && argc < 1)
552		args->all = 1;
553
554	/* -a and -l allow an address family arg to limit the output */
555	if (args->all || args->namesonly) {
556		if (argc > 1)
557			usage();
558
559		if (argc == 1) {
560			const struct afswtch *afp = af_getbyname(*argv);
561
562			if (afp == NULL) {
563				warnx("Address family '%s' unknown.", *argv);
564				usage();
565			}
566			if (afp->af_name != NULL)
567				argc--, argv++;
568			/* leave with afp non-zero */
569			args->afp = afp;
570		}
571	} else {
572		/* not listing, need an argument */
573		if (argc < 1)
574			usage();
575	}
576
577	args->argc = argc;
578	args->argv = argv;
579}
580
581static int
582ifconfig(if_ctx *ctx, int iscreate, const struct afswtch *uafp)
583{
584#ifdef WITHOUT_NETLINK
585	return (ifconfig_ioctl(ctx, iscreate, uafp));
586#else
587	return (ifconfig_nl(ctx, iscreate, uafp));
588#endif
589}
590
591static bool
592isargcreate(const char *arg)
593{
594	if (arg == NULL)
595		return (false);
596
597	if (strcmp(arg, "create") == 0 || strcmp(arg, "plumb") == 0)
598		return (true);
599
600	return (false);
601}
602
603static bool
604isnametoolong(const char *ifname)
605{
606	return (strlen(ifname) >= IFNAMSIZ);
607}
608
609int
610main(int ac, char *av[])
611{
612	char *envformat;
613	int flags;
614#ifdef JAIL
615	int jid;
616#endif
617	struct ifconfig_args _args = {};
618	struct ifconfig_args *args = &_args;
619
620	struct ifconfig_context ctx = {
621		.args = args,
622		.io_s = -1,
623	};
624
625	lifh = ifconfig_open();
626	if (lifh == NULL)
627		err(EXIT_FAILURE, "ifconfig_open");
628
629	envformat = getenv("IFCONFIG_FORMAT");
630	if (envformat != NULL)
631		setformat(envformat);
632
633	/*
634	 * Ensure we print interface name when expected to,
635	 * even if we terminate early due to error.
636	 */
637	atexit(printifnamemaybe);
638
639	args_parse(args, ac, av);
640
641#ifdef JAIL
642	if (args->jail_name) {
643		jid = jail_getid(args->jail_name);
644		if (jid == -1)
645			Perror("jail not found");
646		if (jail_attach(jid) != 0)
647			Perror("cannot attach to jail");
648	}
649#endif
650
651	if (!args->all && !args->namesonly) {
652		/* not listing, need an argument */
653		args->ifname = args_pop(args);
654		ctx.ifname = args->ifname;
655
656		/* check and maybe load support for this interface */
657		ifmaybeload(args, args->ifname);
658
659		char *arg = args_peek(args);
660		if (if_nametoindex(args->ifname) == 0) {
661			/*
662			 * NOTE:  We must special-case the `create' command
663			 * right here as we would otherwise fail when trying
664			 * to find the interface.
665			 */
666			if (isargcreate(arg)) {
667				if (isnametoolong(args->ifname))
668					errx(1, "%s: cloning name too long",
669					    args->ifname);
670				ifconfig(&ctx, 1, NULL);
671				exit(exit_code);
672			}
673#ifdef JAIL
674			/*
675			 * NOTE:  We have to special-case the `-vnet' command
676			 * right here as we would otherwise fail when trying
677			 * to find the interface as it lives in another vnet.
678			 */
679			if (arg != NULL && (strcmp(arg, "-vnet") == 0)) {
680				if (isnametoolong(args->ifname))
681					errx(1, "%s: interface name too long",
682					    args->ifname);
683				ifconfig(&ctx, 0, NULL);
684				exit(exit_code);
685			}
686#endif
687			errx(1, "interface %s does not exist", args->ifname);
688		} else {
689			/*
690			 * Do not allow use `create` command as hostname if
691			 * address family is not specified.
692			 */
693			if (isargcreate(arg)) {
694				if (args->argc == 1)
695					errx(1, "interface %s already exists",
696					    args->ifname);
697				args_pop(args);
698			}
699		}
700	}
701
702	/* Check for address family */
703	if (args->argc > 0) {
704		args->afp = af_getbyname(args_peek(args));
705		if (args->afp != NULL)
706			args_pop(args);
707	}
708
709	/*
710	 * Check for a requested configuration action on a single interface,
711	 * which doesn't require building, sorting, and searching the entire
712	 * system address list
713	 */
714	if ((args->argc > 0) && (args->ifname != NULL)) {
715		if (isnametoolong(args->ifname))
716			warnx("%s: interface name too long, skipping", args->ifname);
717		else {
718			flags = getifflags(args->ifname, -1, false);
719			if (!(((flags & IFF_CANTCONFIG) != 0) ||
720				(args->downonly && (flags & IFF_UP) != 0) ||
721				(args->uponly && (flags & IFF_UP) == 0)))
722				ifconfig(&ctx, 0, args->afp);
723		}
724		goto done;
725	}
726
727	args->allfamilies = args->afp == NULL;
728
729	list_interfaces(&ctx);
730
731done:
732	freeformat();
733	ifconfig_close(lifh);
734	exit(exit_code);
735}
736
737bool
738match_ether(const struct sockaddr_dl *sdl)
739{
740	switch (sdl->sdl_type) {
741		case IFT_ETHER:
742		case IFT_L2VLAN:
743		case IFT_BRIDGE:
744			if (sdl->sdl_alen == ETHER_ADDR_LEN)
745				return (true);
746		default:
747			return (false);
748	}
749}
750
751bool
752match_if_flags(struct ifconfig_args *args, int if_flags)
753{
754	if ((if_flags & IFF_CANTCONFIG) != 0)
755		return (false);
756	if (args->downonly && (if_flags & IFF_UP) != 0)
757		return (false);
758	if (args->uponly && (if_flags & IFF_UP) == 0)
759		return (false);
760	return (true);
761}
762
763#ifdef WITHOUT_NETLINK
764static bool
765match_afp(const struct afswtch *afp, int sa_family, const struct sockaddr_dl *sdl)
766{
767	if (afp == NULL)
768		return (true);
769	/* special case for "ether" address family */
770	if (!strcmp(afp->af_name, "ether")) {
771		if (sdl == NULL || !match_ether(sdl))
772			return (false);
773		return (true);
774	}
775	return (afp->af_af == sa_family);
776}
777
778static void
779list_interfaces_ioctl(if_ctx *ctx)
780{
781	struct ifa_queue q = TAILQ_HEAD_INITIALIZER(q);
782	struct ifaddrs *ifap, *sifap, *ifa;
783	struct ifa_order_elt *cur, *tmp;
784	char *namecp = NULL;
785	int ifindex;
786	struct ifconfig_args *args = ctx->args;
787
788	if (getifaddrs(&ifap) != 0)
789		err(EXIT_FAILURE, "getifaddrs");
790
791	char *cp = NULL;
792
793	if (calcorders(ifap, &q) != 0)
794		err(EXIT_FAILURE, "calcorders");
795
796	sifap = sortifaddrs(ifap, cmpifaddrs, &q);
797
798	TAILQ_FOREACH_SAFE(cur, &q, link, tmp)
799		free(cur);
800
801	ifindex = 0;
802	for (ifa = sifap; ifa; ifa = ifa->ifa_next) {
803		struct ifreq paifr = {};
804		const struct sockaddr_dl *sdl;
805
806		strlcpy(paifr.ifr_name, ifa->ifa_name, sizeof(paifr.ifr_name));
807		if (sizeof(paifr.ifr_addr) >= ifa->ifa_addr->sa_len) {
808			memcpy(&paifr.ifr_addr, ifa->ifa_addr,
809			    ifa->ifa_addr->sa_len);
810		}
811
812		if (args->ifname != NULL && strcmp(args->ifname, ifa->ifa_name) != 0)
813			continue;
814		if (ifa->ifa_addr->sa_family == AF_LINK)
815			sdl = satosdl_c(ifa->ifa_addr);
816		else
817			sdl = NULL;
818		if (cp != NULL && strcmp(cp, ifa->ifa_name) == 0 && !args->namesonly)
819			continue;
820		if (isnametoolong(ifa->ifa_name)) {
821			warnx("%s: interface name too long, skipping",
822			    ifa->ifa_name);
823			continue;
824		}
825		cp = ifa->ifa_name;
826
827		if (!match_if_flags(args, ifa->ifa_flags))
828			continue;
829		if (!group_member(ifa->ifa_name, args->matchgroup, args->nogroup))
830			continue;
831		ctx->ifname = cp;
832		/*
833		 * Are we just listing the interfaces?
834		 */
835		if (args->namesonly) {
836			if (namecp == cp)
837				continue;
838			if (!match_afp(args->afp, ifa->ifa_addr->sa_family, sdl))
839				continue;
840			namecp = cp;
841			ifindex++;
842			if (ifindex > 1)
843				printf(" ");
844			fputs(cp, stdout);
845			continue;
846		}
847		ifindex++;
848
849		if (args->argc > 0)
850			ifconfig(ctx, 0, args->afp);
851		else
852			status(ctx, sdl, ifa);
853	}
854	if (args->namesonly)
855		printf("\n");
856	freeifaddrs(ifap);
857}
858#endif
859
860/*
861 * Returns true if an interface should be listed because any its groups
862 * matches shell pattern "match" and none of groups matches pattern "nomatch".
863 * If any pattern is NULL, corresponding condition is skipped.
864 */
865bool
866group_member(const char *ifname, const char *match, const char *nomatch)
867{
868	static int		 sock = -1;
869
870	struct ifgroupreq	 ifgr;
871	struct ifg_req		*ifg;
872	unsigned int		 len;
873	bool			 matched, nomatched;
874
875	/* Sanity checks. */
876	if (match == NULL && nomatch == NULL)
877		return (true);
878	if (ifname == NULL)
879		return (false);
880
881	memset(&ifgr, 0, sizeof(ifgr));
882	strlcpy(ifgr.ifgr_name, ifname, IFNAMSIZ);
883
884	/* The socket is opened once. Let _exit() close it. */
885	if (sock == -1) {
886		sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
887    		if (sock == -1)
888            	    errx(1, "%s: socket(AF_LOCAL,SOCK_DGRAM)", __func__);
889	}
890
891	/* Determine amount of memory for the list of groups. */
892	if (ioctl(sock, SIOCGIFGROUP, (caddr_t)&ifgr) == -1) {
893		if (errno == EINVAL || errno == ENOTTY)
894			return (false);
895		else
896			errx(1, "%s: SIOCGIFGROUP", __func__);
897	}
898
899	/* Obtain the list of groups. */
900	len = ifgr.ifgr_len;
901	ifgr.ifgr_groups =
902	    (struct ifg_req *)calloc(len / sizeof(*ifg), sizeof(*ifg));
903
904	if (ifgr.ifgr_groups == NULL)
905		errx(1, "%s: no memory", __func__);
906	if (ioctl(sock, SIOCGIFGROUP, (caddr_t)&ifgr) == -1)
907		errx(1, "%s: SIOCGIFGROUP", __func__);
908
909	/* Perform matching. */
910	matched = false;
911	nomatched = true;
912	for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(*ifg); ifg++) {
913		len -= sizeof(*ifg);
914		if (match && !matched)
915			matched = !fnmatch(match, ifg->ifgrq_group, 0);
916		if (nomatch && nomatched)
917			nomatched = fnmatch(nomatch, ifg->ifgrq_group, 0);
918	}
919	free(ifgr.ifgr_groups);
920
921	if (match && !nomatch)
922		return (matched);
923	if (!match && nomatch)
924		return (nomatched);
925	return (matched && nomatched);
926}
927
928static struct afswtch *afs = NULL;
929
930void
931af_register(struct afswtch *p)
932{
933	p->af_next = afs;
934	afs = p;
935}
936
937static struct afswtch *
938af_getbyname(const char *name)
939{
940	struct afswtch *afp;
941
942	for (afp = afs; afp !=  NULL; afp = afp->af_next)
943		if (strcmp(afp->af_name, name) == 0)
944			return afp;
945	return NULL;
946}
947
948struct afswtch *
949af_getbyfamily(int af)
950{
951	struct afswtch *afp;
952
953	for (afp = afs; afp != NULL; afp = afp->af_next)
954		if (afp->af_af == af)
955			return afp;
956	return NULL;
957}
958
959void
960af_other_status(if_ctx *ctx)
961{
962	struct afswtch *afp;
963	uint8_t afmask[howmany(AF_MAX, NBBY)];
964
965	memset(afmask, 0, sizeof(afmask));
966	for (afp = afs; afp != NULL; afp = afp->af_next) {
967		if (afp->af_other_status == NULL)
968			continue;
969		if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af))
970			continue;
971		afp->af_other_status(ctx);
972		setbit(afmask, afp->af_af);
973	}
974}
975
976static void
977af_all_tunnel_status(if_ctx *ctx)
978{
979	struct afswtch *afp;
980	uint8_t afmask[howmany(AF_MAX, NBBY)];
981
982	memset(afmask, 0, sizeof(afmask));
983	for (afp = afs; afp != NULL; afp = afp->af_next) {
984		if (afp->af_status_tunnel == NULL)
985			continue;
986		if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af))
987			continue;
988		afp->af_status_tunnel(ctx);
989		setbit(afmask, afp->af_af);
990	}
991}
992
993static struct cmd *cmds = NULL;
994
995void
996cmd_register(struct cmd *p)
997{
998	p->c_next = cmds;
999	cmds = p;
1000}
1001
1002static const struct cmd *
1003cmd_lookup(const char *name, int iscreate)
1004{
1005	const struct cmd *p;
1006
1007	for (p = cmds; p != NULL; p = p->c_next)
1008		if (strcmp(name, p->c_name) == 0) {
1009			if (iscreate) {
1010				if (p->c_iscloneop)
1011					return p;
1012			} else {
1013				if (!p->c_iscloneop)
1014					return p;
1015			}
1016		}
1017	return NULL;
1018}
1019
1020struct callback {
1021	callback_func *cb_func;
1022	void	*cb_arg;
1023	struct callback *cb_next;
1024};
1025static struct callback *callbacks = NULL;
1026
1027void
1028callback_register(callback_func *func, void *arg)
1029{
1030	struct callback *cb;
1031
1032	cb = malloc(sizeof(struct callback));
1033	if (cb == NULL)
1034		errx(1, "unable to allocate memory for callback");
1035	cb->cb_func = func;
1036	cb->cb_arg = arg;
1037	cb->cb_next = callbacks;
1038	callbacks = cb;
1039}
1040
1041/* specially-handled commands */
1042static void setifaddr(if_ctx *ctx, const char *addr, int param);
1043static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr);
1044
1045static void setifdstaddr(if_ctx *ctx, const char *addr, int param __unused);
1046static const struct cmd setifdstaddr_cmd =
1047	DEF_CMD("ifdstaddr", 0, setifdstaddr);
1048
1049int
1050af_exec_ioctl(if_ctx *ctx, unsigned long action, void *data)
1051{
1052	struct ifreq *req = (struct ifreq *)data;
1053
1054	strlcpy(req->ifr_name, ctx->ifname, sizeof(req->ifr_name));
1055	if (ioctl_ctx(ctx, action, req) == 0)
1056		return (0);
1057	return (errno);
1058}
1059
1060static void
1061delifaddr(if_ctx *ctx, const struct afswtch *afp)
1062{
1063	int error;
1064
1065	if (afp->af_exec == NULL) {
1066		warnx("interface %s cannot change %s addresses!",
1067		    ctx->ifname, afp->af_name);
1068		clearaddr = 0;
1069		return;
1070	}
1071
1072	error = afp->af_exec(ctx, afp->af_difaddr, afp->af_ridreq);
1073	if (error != 0) {
1074		if (error == EADDRNOTAVAIL && (doalias >= 0)) {
1075			/* means no previous address for interface */
1076		} else
1077			Perrorc("ioctl (SIOCDIFADDR)", error);
1078	}
1079}
1080
1081static void
1082addifaddr(if_ctx *ctx, const struct afswtch *afp)
1083{
1084	if (afp->af_exec == NULL) {
1085		warnx("interface %s cannot change %s addresses!",
1086		      ctx->ifname, afp->af_name);
1087		newaddr = 0;
1088		return;
1089	}
1090
1091	if (setaddr || setmask) {
1092		int error = afp->af_exec(ctx, afp->af_aifaddr, afp->af_addreq);
1093		if (error != 0)
1094			Perrorc("ioctl (SIOCAIFADDR)", error);
1095	}
1096}
1097
1098int
1099ifconfig_ioctl(if_ctx *orig_ctx, int iscreate, const struct afswtch *uafp)
1100{
1101	const struct afswtch *afp, *nafp;
1102	const struct cmd *p;
1103	struct callback *cb;
1104	int s;
1105	int argc = orig_ctx->args->argc;
1106	char *const *argv = orig_ctx->args->argv;
1107	struct ifconfig_context _ctx = {
1108		.args = orig_ctx->args,
1109		.io_ss = orig_ctx->io_ss,
1110		.ifname = orig_ctx->ifname,
1111	};
1112	struct ifconfig_context *ctx = &_ctx;
1113
1114	struct ifreq ifr = {};
1115	strlcpy(ifr.ifr_name, ctx->ifname, sizeof ifr.ifr_name);
1116	afp = NULL;
1117	if (uafp != NULL)
1118		afp = uafp;
1119	/*
1120	 * This is the historical "accident" allowing users to configure IPv4
1121	 * addresses without the "inet" keyword which while a nice feature has
1122	 * proven to complicate other things.  We cannot remove this but only
1123	 * make sure we will never have a similar implicit default for IPv6 or
1124	 * any other address familiy.  We need a fallback though for
1125	 * ifconfig IF up/down etc. to work without INET support as people
1126	 * never used ifconfig IF link up/down, etc. either.
1127	 */
1128#ifndef RESCUE
1129#ifdef INET
1130	if (afp == NULL && feature_present("inet"))
1131		afp = af_getbyname("inet");
1132#endif
1133#endif
1134	if (afp == NULL)
1135		afp = af_getbyname("link");
1136	if (afp == NULL) {
1137		warnx("Please specify an address_family.");
1138		usage();
1139	}
1140
1141top:
1142	ifr.ifr_addr.sa_family =
1143		afp->af_af == AF_LINK || afp->af_af == AF_UNSPEC ?
1144		AF_LOCAL : afp->af_af;
1145
1146	if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0 &&
1147	    (uafp != NULL || errno != EAFNOSUPPORT ||
1148	     (s = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0))
1149		err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family);
1150
1151	ctx->io_s = s;
1152	ctx->afp = afp;
1153
1154	while (argc > 0) {
1155		p = cmd_lookup(*argv, iscreate);
1156		if (iscreate && p == NULL) {
1157			/*
1158			 * Push the clone create callback so the new
1159			 * device is created and can be used for any
1160			 * remaining arguments.
1161			 */
1162			cb = callbacks;
1163			if (cb == NULL)
1164				errx(1, "internal error, no callback");
1165			callbacks = cb->cb_next;
1166			cb->cb_func(ctx, cb->cb_arg);
1167			iscreate = 0;
1168			/*
1169			 * Handle any address family spec that
1170			 * immediately follows and potentially
1171			 * recreate the socket.
1172			 */
1173			nafp = af_getbyname(*argv);
1174			if (nafp != NULL) {
1175				argc--, argv++;
1176				if (nafp != afp) {
1177					close(s);
1178					afp = nafp;
1179					goto top;
1180				}
1181			}
1182			/*
1183			 * Look for a normal parameter.
1184			 */
1185			continue;
1186		}
1187		if (p == NULL) {
1188			/*
1189			 * Not a recognized command, choose between setting
1190			 * the interface address and the dst address.
1191			 */
1192			p = (setaddr ? &setifdstaddr_cmd : &setifaddr_cmd);
1193		}
1194		if (p->c_parameter == NEXTARG && p->c_u.c_func) {
1195			if (argv[1] == NULL)
1196				errx(1, "'%s' requires argument",
1197				    p->c_name);
1198			p->c_u.c_func(ctx, argv[1], 0);
1199			argc--, argv++;
1200		} else if (p->c_parameter == OPTARG && p->c_u.c_func) {
1201			p->c_u.c_func(ctx, argv[1], 0);
1202			if (argv[1] != NULL)
1203				argc--, argv++;
1204		} else if (p->c_parameter == NEXTARG2 && p->c_u.c_func2) {
1205			if (argc < 3)
1206				errx(1, "'%s' requires 2 arguments",
1207				    p->c_name);
1208			p->c_u.c_func2(ctx, argv[1], argv[2]);
1209			argc -= 2, argv += 2;
1210		} else if (p->c_parameter == SPARAM && p->c_u.c_func3) {
1211			p->c_u.c_func3(ctx, *argv, p->c_sparameter);
1212		} else if (p->c_u.c_func)
1213			p->c_u.c_func(ctx, *argv, p->c_parameter);
1214		argc--, argv++;
1215	}
1216
1217	/*
1218	 * Do any post argument processing required by the address family.
1219	 */
1220	if (afp->af_postproc != NULL)
1221		afp->af_postproc(ctx, newaddr, getifflags(ctx->ifname, s, true));
1222	/*
1223	 * Do deferred callbacks registered while processing
1224	 * command-line arguments.
1225	 */
1226	for (cb = callbacks; cb != NULL; cb = cb->cb_next)
1227		cb->cb_func(ctx, cb->cb_arg);
1228	/*
1229	 * Do deferred operations.
1230	 */
1231	if (clearaddr)
1232		delifaddr(ctx, afp);
1233	if (newaddr)
1234		addifaddr(ctx, afp);
1235
1236	close(s);
1237	return(0);
1238}
1239
1240static void
1241setifaddr(if_ctx *ctx, const char *addr, int param __unused)
1242{
1243	const struct afswtch *afp = ctx->afp;
1244
1245	if (afp->af_getaddr == NULL)
1246		return;
1247	/*
1248	 * Delay the ioctl to set the interface addr until flags are all set.
1249	 * The address interpretation may depend on the flags,
1250	 * and the flags may change when the address is set.
1251	 */
1252	setaddr++;
1253	if (doalias == 0 && afp->af_af != AF_LINK)
1254		clearaddr = 1;
1255	afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR));
1256}
1257
1258static void
1259settunnel(if_ctx *ctx, const char *src, const char *dst)
1260{
1261	const struct afswtch *afp = ctx->afp;
1262	struct addrinfo *srcres, *dstres;
1263	int ecode;
1264
1265	if (afp->af_settunnel == NULL) {
1266		warn("address family %s does not support tunnel setup",
1267			afp->af_name);
1268		return;
1269	}
1270
1271	if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0)
1272		errx(1, "error in parsing address string: %s",
1273		    gai_strerror(ecode));
1274
1275	if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0)
1276		errx(1, "error in parsing address string: %s",
1277		    gai_strerror(ecode));
1278
1279	if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family)
1280		errx(1,
1281		    "source and destination address families do not match");
1282
1283	afp->af_settunnel(ctx, srcres, dstres);
1284
1285	freeaddrinfo(srcres);
1286	freeaddrinfo(dstres);
1287}
1288
1289static void
1290deletetunnel(if_ctx *ctx, const char *vname __unused, int param __unused)
1291{
1292	struct ifreq ifr = {};
1293
1294	if (ioctl_ctx_ifr(ctx, SIOCDIFPHYADDR, &ifr) < 0)
1295		err(1, "SIOCDIFPHYADDR");
1296}
1297
1298#ifdef JAIL
1299static void
1300setifvnet(if_ctx *ctx, const char *jname, int dummy __unused)
1301{
1302	struct ifreq ifr = {};
1303
1304	ifr.ifr_jid = jail_getid(jname);
1305	if (ifr.ifr_jid < 0)
1306		errx(1, "%s", jail_errmsg);
1307	if (ioctl_ctx_ifr(ctx, SIOCSIFVNET, &ifr) < 0)
1308		err(1, "SIOCSIFVNET");
1309}
1310
1311static void
1312setifrvnet(if_ctx *ctx, const char *jname, int dummy __unused)
1313{
1314	struct ifreq ifr = {};
1315
1316	ifr.ifr_jid = jail_getid(jname);
1317	if (ifr.ifr_jid < 0)
1318		errx(1, "%s", jail_errmsg);
1319	if (ioctl_ctx_ifr(ctx, SIOCSIFRVNET, &ifr) < 0)
1320		err(1, "SIOCSIFRVNET(%d, %s)", ifr.ifr_jid, ifr.ifr_name);
1321}
1322#endif
1323
1324static void
1325setifnetmask(if_ctx *ctx, const char *addr, int dummy __unused)
1326{
1327	const struct afswtch *afp = ctx->afp;
1328
1329	if (afp->af_getaddr != NULL) {
1330		setmask++;
1331		afp->af_getaddr(addr, MASK);
1332	}
1333}
1334
1335static void
1336setifbroadaddr(if_ctx *ctx, const char *addr, int dummy __unused)
1337{
1338	const struct afswtch *afp = ctx->afp;
1339
1340	if (afp->af_getaddr != NULL)
1341		afp->af_getaddr(addr, BRDADDR);
1342}
1343
1344static void
1345notealias(if_ctx *ctx, const char *addr __unused, int param)
1346{
1347	const struct afswtch *afp = ctx->afp;
1348
1349	if (setaddr && doalias == 0 && param < 0) {
1350		if (afp->af_copyaddr != NULL)
1351			afp->af_copyaddr(ctx, RIDADDR, ADDR);
1352	}
1353	doalias = param;
1354	if (param < 0) {
1355		clearaddr = 1;
1356		newaddr = 0;
1357	} else
1358		clearaddr = 0;
1359}
1360
1361static void
1362setifdstaddr(if_ctx *ctx, const char *addr, int param __unused)
1363{
1364	const struct afswtch *afp = ctx->afp;
1365
1366	if (afp->af_getaddr != NULL)
1367		afp->af_getaddr(addr, DSTADDR);
1368}
1369
1370static int
1371getifflags(const char *ifname, int us, bool err_ok)
1372{
1373	struct ifreq my_ifr;
1374	int s;
1375
1376	memset(&my_ifr, 0, sizeof(my_ifr));
1377	(void) strlcpy(my_ifr.ifr_name, ifname, sizeof(my_ifr.ifr_name));
1378	if (us < 0) {
1379		if ((s = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0)
1380			err(1, "socket(family AF_LOCAL,SOCK_DGRAM");
1381	} else
1382		s = us;
1383 	if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) {
1384		if (!err_ok) {
1385			Perror("ioctl (SIOCGIFFLAGS)");
1386			exit(1);
1387		}
1388 	}
1389	if (us < 0)
1390		close(s);
1391	return ((my_ifr.ifr_flags & 0xffff) | (my_ifr.ifr_flagshigh << 16));
1392}
1393
1394/*
1395 * Note: doing an SIOCIGIFFLAGS scribbles on the union portion
1396 * of the ifreq structure, which may confuse other parts of ifconfig.
1397 * Make a private copy so we can avoid that.
1398 */
1399static void
1400clearifflags(if_ctx *ctx, const char *vname, int value)
1401{
1402	struct ifreq		my_ifr;
1403	int flags;
1404
1405	flags = getifflags(ctx->ifname, ctx->io_s, false);
1406	flags &= ~value;
1407	memset(&my_ifr, 0, sizeof(my_ifr));
1408	strlcpy(my_ifr.ifr_name, ctx->ifname, sizeof(my_ifr.ifr_name));
1409	my_ifr.ifr_flags = flags & 0xffff;
1410	my_ifr.ifr_flagshigh = flags >> 16;
1411	if (ioctl(ctx->io_s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0)
1412		Perror(vname);
1413}
1414
1415static void
1416setifflags(if_ctx *ctx, const char *vname, int value)
1417{
1418	struct ifreq		my_ifr;
1419	int flags;
1420
1421	flags = getifflags(ctx->ifname, ctx->io_s, false);
1422	flags |= value;
1423	memset(&my_ifr, 0, sizeof(my_ifr));
1424	strlcpy(my_ifr.ifr_name, ctx->ifname, sizeof(my_ifr.ifr_name));
1425	my_ifr.ifr_flags = flags & 0xffff;
1426	my_ifr.ifr_flagshigh = flags >> 16;
1427	if (ioctl(ctx->io_s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0)
1428		Perror(vname);
1429}
1430
1431void
1432clearifcap(if_ctx *ctx, const char *vname, int value)
1433{
1434	struct ifreq ifr = {};
1435	int flags;
1436
1437	if (ioctl_ctx_ifr(ctx, SIOCGIFCAP, &ifr) < 0) {
1438 		Perror("ioctl (SIOCGIFCAP)");
1439 		exit(1);
1440 	}
1441	flags = ifr.ifr_curcap;
1442	flags &= ~value;
1443	flags &= ifr.ifr_reqcap;
1444	/* Check for no change in capabilities. */
1445	if (ifr.ifr_curcap == flags)
1446		return;
1447	ifr.ifr_reqcap = flags;
1448	if (ioctl_ctx(ctx, SIOCSIFCAP, &ifr) < 0)
1449		Perror(vname);
1450}
1451
1452void
1453setifcap(if_ctx *ctx, const char *vname, int value)
1454{
1455	struct ifreq ifr = {};
1456	int flags;
1457
1458	if (ioctl_ctx_ifr(ctx, SIOCGIFCAP, &ifr) < 0) {
1459 		Perror("ioctl (SIOCGIFCAP)");
1460 		exit(1);
1461 	}
1462	flags = ifr.ifr_curcap;
1463	flags |= value;
1464	flags &= ifr.ifr_reqcap;
1465	/* Check for no change in capabilities. */
1466	if (ifr.ifr_curcap == flags)
1467		return;
1468	ifr.ifr_reqcap = flags;
1469	if (ioctl_ctx(ctx, SIOCSIFCAP, &ifr) < 0)
1470		Perror(vname);
1471}
1472
1473void
1474setifcapnv(if_ctx *ctx, const char *vname, const char *arg)
1475{
1476	nvlist_t *nvcap;
1477	void *buf;
1478	char *marg, *mopt;
1479	size_t nvbuflen;
1480	bool neg;
1481	struct ifreq ifr = {};
1482
1483	if (ioctl_ctx_ifr(ctx, SIOCGIFCAP, &ifr) < 0)
1484		Perror("ioctl (SIOCGIFCAP)");
1485	if ((ifr.ifr_curcap & IFCAP_NV) == 0) {
1486		warnx("IFCAP_NV not supported");
1487		return; /* Not exit() */
1488	}
1489
1490	marg = strdup(arg);
1491	if (marg == NULL)
1492		Perror("strdup");
1493	nvcap = nvlist_create(0);
1494	if (nvcap == NULL)
1495		Perror("nvlist_create");
1496	while ((mopt = strsep(&marg, ",")) != NULL) {
1497		neg = *mopt == '-';
1498		if (neg)
1499			mopt++;
1500		if (strcmp(mopt, "rxtls") == 0) {
1501			nvlist_add_bool(nvcap, "rxtls4", !neg);
1502			nvlist_add_bool(nvcap, "rxtls6", !neg);
1503		} else {
1504			nvlist_add_bool(nvcap, mopt, !neg);
1505		}
1506	}
1507	buf = nvlist_pack(nvcap, &nvbuflen);
1508	if (buf == NULL) {
1509		errx(1, "nvlist_pack error");
1510		exit(1);
1511	}
1512	ifr.ifr_cap_nv.buf_length = ifr.ifr_cap_nv.length = nvbuflen;
1513	ifr.ifr_cap_nv.buffer = buf;
1514	if (ioctl_ctx(ctx, SIOCSIFCAPNV, (caddr_t)&ifr) < 0)
1515		Perror(vname);
1516	free(buf);
1517	nvlist_destroy(nvcap);
1518	free(marg);
1519}
1520
1521static void
1522setifmetric(if_ctx *ctx, const char *val, int dummy __unused)
1523{
1524	struct ifreq ifr = {};
1525
1526	ifr.ifr_metric = atoi(val);
1527	if (ioctl_ctx_ifr(ctx, SIOCSIFMETRIC, &ifr) < 0)
1528		err(1, "ioctl SIOCSIFMETRIC (set metric)");
1529}
1530
1531static void
1532setifmtu(if_ctx *ctx, const char *val, int dummy __unused)
1533{
1534	struct ifreq ifr = {};
1535
1536	ifr.ifr_mtu = atoi(val);
1537	if (ioctl_ctx_ifr(ctx, SIOCSIFMTU, &ifr) < 0)
1538		err(1, "ioctl SIOCSIFMTU (set mtu)");
1539}
1540
1541static void
1542setifpcp(if_ctx *ctx, const char *val, int arg __unused)
1543{
1544	struct ifreq ifr = {};
1545	u_long ul;
1546	char *endp;
1547
1548	ul = strtoul(val, &endp, 0);
1549	if (*endp != '\0')
1550		errx(1, "invalid value for pcp");
1551	if (ul > 7)
1552		errx(1, "value for pcp out of range");
1553	ifr.ifr_lan_pcp = ul;
1554	if (ioctl_ctx_ifr(ctx, SIOCSLANPCP, &ifr) == -1)
1555		err(1, "SIOCSLANPCP");
1556}
1557
1558static void
1559disableifpcp(if_ctx *ctx, const char *val __unused, int arg __unused)
1560{
1561	struct ifreq ifr = {};
1562
1563	ifr.ifr_lan_pcp = IFNET_PCP_NONE;
1564	if (ioctl_ctx_ifr(ctx, SIOCSLANPCP, &ifr) == -1)
1565		err(1, "SIOCSLANPCP");
1566}
1567
1568static void
1569setifname(if_ctx *ctx, const char *val, int dummy __unused)
1570{
1571	struct ifreq ifr = {};
1572	char *newname;
1573
1574	ifr_set_name(&ifr, ctx->ifname);
1575	newname = strdup(val);
1576	if (newname == NULL)
1577		err(1, "no memory to set ifname");
1578	ifr.ifr_data = newname;
1579	if (ioctl_ctx(ctx, SIOCSIFNAME, (caddr_t)&ifr) < 0) {
1580		free(newname);
1581		err(1, "ioctl SIOCSIFNAME (set name)");
1582	}
1583	ifname_update(ctx, newname);
1584	free(newname);
1585}
1586
1587static void
1588setifdescr(if_ctx *ctx, const char *val, int dummy __unused)
1589{
1590	struct ifreq ifr = {};
1591	char *newdescr;
1592
1593	ifr.ifr_buffer.length = strlen(val) + 1;
1594	if (ifr.ifr_buffer.length == 1) {
1595		ifr.ifr_buffer.buffer = newdescr = NULL;
1596		ifr.ifr_buffer.length = 0;
1597	} else {
1598		newdescr = strdup(val);
1599		ifr.ifr_buffer.buffer = newdescr;
1600		if (newdescr == NULL) {
1601			warn("no memory to set ifdescr");
1602			return;
1603		}
1604	}
1605
1606	if (ioctl_ctx_ifr(ctx, SIOCSIFDESCR, &ifr) < 0)
1607		err(1, "ioctl SIOCSIFDESCR (set descr)");
1608
1609	free(newdescr);
1610}
1611
1612static void
1613unsetifdescr(if_ctx *ctx, const char *val __unused, int value __unused)
1614{
1615	setifdescr(ctx, "", 0);
1616}
1617
1618#ifdef WITHOUT_NETLINK
1619
1620#define	IFFBITS \
1621"\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\7RUNNING" \
1622"\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2" \
1623"\20MULTICAST\22PPROMISC\23MONITOR\24STATICARP\25STICKYARP"
1624
1625#define	IFCAPBITS \
1626"\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7POLLING" \
1627"\10VLAN_HWCSUM\11TSO4\12TSO6\13LRO\14WOL_UCAST\15WOL_MCAST\16WOL_MAGIC" \
1628"\17TOE4\20TOE6\21VLAN_HWFILTER\23VLAN_HWTSO\24LINKSTATE\25NETMAP" \
1629"\26RXCSUM_IPV6\27TXCSUM_IPV6\31TXRTLMT\32HWRXTSTMP\33NOMAP\34TXTLS4\35TXTLS6" \
1630"\36VXLAN_HWCSUM\37VXLAN_HWTSO\40TXTLS_RTLMT"
1631
1632static void
1633print_ifcap_nv(if_ctx *ctx)
1634{
1635	struct ifreq ifr = {};
1636	nvlist_t *nvcap;
1637	const char *nvname;
1638	void *buf, *cookie;
1639	bool first, val;
1640	int type;
1641
1642	buf = malloc(IFR_CAP_NV_MAXBUFSIZE);
1643	if (buf == NULL)
1644		Perror("malloc");
1645	ifr.ifr_cap_nv.buffer = buf;
1646	ifr.ifr_cap_nv.buf_length = IFR_CAP_NV_MAXBUFSIZE;
1647	if (ioctl_ctx_ifr(ctx, SIOCGIFCAPNV, &ifr) != 0)
1648		Perror("ioctl (SIOCGIFCAPNV)");
1649	nvcap = nvlist_unpack(ifr.ifr_cap_nv.buffer,
1650	    ifr.ifr_cap_nv.length, 0);
1651	if (nvcap == NULL)
1652		Perror("nvlist_unpack");
1653	printf("\toptions");
1654	cookie = NULL;
1655	for (first = true;; first = false) {
1656		nvname = nvlist_next(nvcap, &type, &cookie);
1657		if (nvname == NULL) {
1658			printf("\n");
1659			break;
1660		}
1661		if (type == NV_TYPE_BOOL) {
1662			val = nvlist_get_bool(nvcap, nvname);
1663			if (val) {
1664				printf("%c%s",
1665				    first ? ' ' : ',', nvname);
1666			}
1667		}
1668	}
1669	if (ctx->args->supmedia) {
1670		printf("\tcapabilities");
1671		cookie = NULL;
1672		for (first = true;; first = false) {
1673			nvname = nvlist_next(nvcap, &type,
1674			    &cookie);
1675			if (nvname == NULL) {
1676				printf("\n");
1677				break;
1678			}
1679			if (type == NV_TYPE_BOOL)
1680				printf("%c%s", first ? ' ' :
1681				    ',', nvname);
1682		}
1683	}
1684	nvlist_destroy(nvcap);
1685	free(buf);
1686
1687	if (ioctl_ctx(ctx, SIOCGIFCAP, (caddr_t)&ifr) != 0)
1688		Perror("ioctl (SIOCGIFCAP)");
1689}
1690
1691static void
1692print_ifcap(if_ctx *ctx)
1693{
1694	struct ifreq ifr = {};
1695
1696	if (ioctl_ctx_ifr(ctx, SIOCGIFCAP, &ifr) != 0)
1697		return;
1698
1699	if ((ifr.ifr_curcap & IFCAP_NV) != 0)
1700		print_ifcap_nv(ctx);
1701	else {
1702		printb("\toptions", ifr.ifr_curcap, IFCAPBITS);
1703		putchar('\n');
1704		if (ctx->args->supmedia && ifr.ifr_reqcap != 0) {
1705			printb("\tcapabilities", ifr.ifr_reqcap, IFCAPBITS);
1706			putchar('\n');
1707		}
1708	}
1709}
1710#endif
1711
1712void
1713print_ifstatus(if_ctx *ctx)
1714{
1715	struct ifstat ifs;
1716
1717	strlcpy(ifs.ifs_name, ctx->ifname, sizeof ifs.ifs_name);
1718	if (ioctl_ctx(ctx, SIOCGIFSTATUS, &ifs) == 0)
1719		printf("%s", ifs.ascii);
1720}
1721
1722void
1723print_metric(if_ctx *ctx)
1724{
1725	struct ifreq ifr = {};
1726
1727	if (ioctl_ctx_ifr(ctx, SIOCGIFMETRIC, &ifr) != -1)
1728		printf(" metric %d", ifr.ifr_metric);
1729}
1730
1731#ifdef WITHOUT_NETLINK
1732static void
1733print_mtu(if_ctx *ctx)
1734{
1735	struct ifreq ifr = {};
1736
1737	if (ioctl_ctx_ifr(ctx, SIOCGIFMTU, &ifr) != -1)
1738		printf(" mtu %d", ifr.ifr_mtu);
1739}
1740
1741static void
1742print_description(if_ctx *ctx)
1743{
1744	struct ifreq ifr = {};
1745
1746	ifr_set_name(&ifr, ctx->ifname);
1747	for (;;) {
1748		if ((descr = reallocf(descr, descrlen)) != NULL) {
1749			ifr.ifr_buffer.buffer = descr;
1750			ifr.ifr_buffer.length = descrlen;
1751			if (ioctl_ctx(ctx, SIOCGIFDESCR, &ifr) == 0) {
1752				if (ifr.ifr_buffer.buffer == descr) {
1753					if (strlen(descr) > 0)
1754						printf("\tdescription: %s\n",
1755						    descr);
1756				} else if (ifr.ifr_buffer.length > descrlen) {
1757					descrlen = ifr.ifr_buffer.length;
1758					continue;
1759				}
1760			}
1761		} else
1762			warn("unable to allocate memory for interface"
1763			    "description");
1764		break;
1765	}
1766}
1767
1768/*
1769 * Print the status of the interface.  If an address family was
1770 * specified, show only it; otherwise, show them all.
1771 */
1772static void
1773status(if_ctx *ctx, const struct sockaddr_dl *sdl __unused, struct ifaddrs *ifa)
1774{
1775	struct ifaddrs *ift;
1776	int s, old_s;
1777	struct ifconfig_args *args = ctx->args;
1778	bool allfamilies = args->afp == NULL;
1779	struct ifreq ifr = {};
1780
1781	if (args->afp == NULL)
1782		ifr.ifr_addr.sa_family = AF_LOCAL;
1783	else
1784		ifr.ifr_addr.sa_family =
1785		   args->afp->af_af == AF_LINK ? AF_LOCAL : args->afp->af_af;
1786
1787	s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0);
1788	if (s < 0)
1789		err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family);
1790	old_s = ctx->io_s;
1791	ctx->io_s = s;
1792
1793	printf("%s: ", ctx->ifname);
1794	printb("flags", ifa->ifa_flags, IFFBITS);
1795	print_metric(ctx);
1796	print_mtu(ctx);
1797	putchar('\n');
1798
1799	print_description(ctx);
1800
1801	print_ifcap(ctx);
1802
1803	tunnel_status(ctx);
1804
1805	for (ift = ifa; ift != NULL; ift = ift->ifa_next) {
1806		if (ift->ifa_addr == NULL)
1807			continue;
1808		if (strcmp(ifa->ifa_name, ift->ifa_name) != 0)
1809			continue;
1810		if (allfamilies) {
1811			const struct afswtch *p;
1812			p = af_getbyfamily(ift->ifa_addr->sa_family);
1813			if (p != NULL && p->af_status != NULL)
1814				p->af_status(ctx, ift);
1815		} else if (args->afp->af_af == ift->ifa_addr->sa_family)
1816			args->afp->af_status(ctx, ift);
1817	}
1818#if 0
1819	if (allfamilies || afp->af_af == AF_LINK) {
1820		const struct afswtch *lafp;
1821
1822		/*
1823		 * Hack; the link level address is received separately
1824		 * from the routing information so any address is not
1825		 * handled above.  Cobble together an entry and invoke
1826		 * the status method specially.
1827		 */
1828		lafp = af_getbyname("lladdr");
1829		if (lafp != NULL) {
1830			info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl;
1831			lafp->af_status(s, &info);
1832		}
1833	}
1834#endif
1835	if (allfamilies)
1836		af_other_status(ctx);
1837	else if (args->afp->af_other_status != NULL)
1838		args->afp->af_other_status(ctx);
1839
1840	print_ifstatus(ctx);
1841	if (args->verbose > 0)
1842		sfp_status(ctx);
1843
1844	close(s);
1845	ctx->io_s = old_s;
1846	return;
1847}
1848#endif
1849
1850void
1851tunnel_status(if_ctx *ctx)
1852{
1853	af_all_tunnel_status(ctx);
1854}
1855
1856static void
1857Perrorc(const char *cmd, int error)
1858{
1859	switch (errno) {
1860
1861	case ENXIO:
1862		errx(1, "%s: no such interface", cmd);
1863		break;
1864
1865	case EPERM:
1866		errx(1, "%s: permission denied", cmd);
1867		break;
1868
1869	default:
1870		errc(1, error, "%s", cmd);
1871	}
1872}
1873
1874void
1875Perror(const char *cmd)
1876{
1877	Perrorc(cmd, errno);
1878}
1879
1880/*
1881 * Print a value a la the %b format of the kernel's printf
1882 */
1883void
1884printb(const char *s, unsigned v, const char *bits)
1885{
1886	int i, any = 0;
1887	char c;
1888
1889	if (bits && *bits == 8)
1890		printf("%s=%o", s, v);
1891	else
1892		printf("%s=%x", s, v);
1893	if (bits) {
1894		bits++;
1895		putchar('<');
1896		while ((i = *bits++) != '\0') {
1897			if (v & (1u << (i-1))) {
1898				if (any)
1899					putchar(',');
1900				any = 1;
1901				for (; (c = *bits) > 32; bits++)
1902					putchar(c);
1903			} else
1904				for (; *bits > 32; bits++)
1905					;
1906		}
1907		putchar('>');
1908	}
1909}
1910
1911void
1912print_vhid(const struct ifaddrs *ifa)
1913{
1914	struct if_data *ifd;
1915
1916	if (ifa->ifa_data == NULL)
1917		return;
1918
1919	ifd = ifa->ifa_data;
1920	if (ifd->ifi_vhid == 0)
1921		return;
1922
1923	printf(" vhid %d", ifd->ifi_vhid);
1924}
1925
1926void
1927ifmaybeload(struct ifconfig_args *args, const char *name)
1928{
1929#define MOD_PREFIX_LEN		3	/* "if_" */
1930	struct module_stat mstat;
1931	int fileid, modid;
1932	char ifkind[IFNAMSIZ + MOD_PREFIX_LEN], ifname[IFNAMSIZ], *dp;
1933	const char *cp;
1934	struct module_map_entry *mme;
1935	bool found;
1936
1937	/* loading suppressed by the user */
1938	if (args->noload)
1939		return;
1940
1941	/* trim the interface number off the end */
1942	strlcpy(ifname, name, sizeof(ifname));
1943	dp = ifname + strlen(ifname) - 1;
1944	for (; dp > ifname; dp--) {
1945		if (isdigit(*dp))
1946			*dp = '\0';
1947		else
1948			break;
1949	}
1950
1951	/* Either derive it from the map or guess otherwise */
1952	*ifkind = '\0';
1953	found = false;
1954	for (unsigned i = 0; i < nitems(module_map); ++i) {
1955		mme = &module_map[i];
1956		if (strcmp(mme->ifname, ifname) == 0) {
1957			strlcpy(ifkind, mme->kldname, sizeof(ifkind));
1958			found = true;
1959			break;
1960		}
1961	}
1962
1963	/* We didn't have an alias for it... we'll guess. */
1964	if (!found) {
1965	    /* turn interface and unit into module name */
1966	    strlcpy(ifkind, "if_", sizeof(ifkind));
1967	    strlcat(ifkind, ifname, sizeof(ifkind));
1968	}
1969
1970	/* scan files in kernel */
1971	mstat.version = sizeof(struct module_stat);
1972	for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) {
1973		/* scan modules in file */
1974		for (modid = kldfirstmod(fileid); modid > 0;
1975		     modid = modfnext(modid)) {
1976			if (modstat(modid, &mstat) < 0)
1977				continue;
1978			/* strip bus name if present */
1979			if ((cp = strchr(mstat.name, '/')) != NULL) {
1980				cp++;
1981			} else {
1982				cp = mstat.name;
1983			}
1984			/*
1985			 * Is it already loaded?  Don't compare with ifname if
1986			 * we were specifically told which kld to use.  Doing
1987			 * so could lead to conflicts not trivially solved.
1988			 */
1989			if ((!found && strcmp(ifname, cp) == 0) ||
1990			    strcmp(ifkind, cp) == 0)
1991				return;
1992		}
1993	}
1994
1995	/*
1996	 * Try to load the module.  But ignore failures, because ifconfig can't
1997	 * infer the names of all drivers (eg mlx4en(4)).
1998	 */
1999	(void) kldload(ifkind);
2000}
2001
2002static struct cmd basic_cmds[] = {
2003	DEF_CMD("up",		IFF_UP,		setifflags),
2004	DEF_CMD("down",		IFF_UP,		clearifflags),
2005	DEF_CMD("arp",		IFF_NOARP,	clearifflags),
2006	DEF_CMD("-arp",		IFF_NOARP,	setifflags),
2007	DEF_CMD("debug",	IFF_DEBUG,	setifflags),
2008	DEF_CMD("-debug",	IFF_DEBUG,	clearifflags),
2009	DEF_CMD_ARG("description",		setifdescr),
2010	DEF_CMD_ARG("descr",			setifdescr),
2011	DEF_CMD("-description",	0,		unsetifdescr),
2012	DEF_CMD("-descr",	0,		unsetifdescr),
2013	DEF_CMD("promisc",	IFF_PPROMISC,	setifflags),
2014	DEF_CMD("-promisc",	IFF_PPROMISC,	clearifflags),
2015	DEF_CMD("add",		IFF_UP,		notealias),
2016	DEF_CMD("alias",	IFF_UP,		notealias),
2017	DEF_CMD("-alias",	-IFF_UP,	notealias),
2018	DEF_CMD("delete",	-IFF_UP,	notealias),
2019	DEF_CMD("remove",	-IFF_UP,	notealias),
2020#ifdef notdef
2021#define	EN_SWABIPS	0x1000
2022	DEF_CMD("swabips",	EN_SWABIPS,	setifflags),
2023	DEF_CMD("-swabips",	EN_SWABIPS,	clearifflags),
2024#endif
2025	DEF_CMD_ARG("netmask",			setifnetmask),
2026	DEF_CMD_ARG("metric",			setifmetric),
2027	DEF_CMD_ARG("broadcast",		setifbroadaddr),
2028	DEF_CMD_ARG2("tunnel",			settunnel),
2029	DEF_CMD("-tunnel", 0,			deletetunnel),
2030	DEF_CMD("deletetunnel", 0,		deletetunnel),
2031#ifdef JAIL
2032	DEF_CMD_ARG("vnet",			setifvnet),
2033	DEF_CMD_ARG("-vnet",			setifrvnet),
2034#endif
2035	DEF_CMD("link0",	IFF_LINK0,	setifflags),
2036	DEF_CMD("-link0",	IFF_LINK0,	clearifflags),
2037	DEF_CMD("link1",	IFF_LINK1,	setifflags),
2038	DEF_CMD("-link1",	IFF_LINK1,	clearifflags),
2039	DEF_CMD("link2",	IFF_LINK2,	setifflags),
2040	DEF_CMD("-link2",	IFF_LINK2,	clearifflags),
2041	DEF_CMD("monitor",	IFF_MONITOR,	setifflags),
2042	DEF_CMD("-monitor",	IFF_MONITOR,	clearifflags),
2043	DEF_CMD("mextpg",	IFCAP_MEXTPG,	setifcap),
2044	DEF_CMD("-mextpg",	IFCAP_MEXTPG,	clearifcap),
2045	DEF_CMD("staticarp",	IFF_STATICARP,	setifflags),
2046	DEF_CMD("-staticarp",	IFF_STATICARP,	clearifflags),
2047	DEF_CMD("stickyarp",	IFF_STICKYARP,	setifflags),
2048	DEF_CMD("-stickyarp",	IFF_STICKYARP,	clearifflags),
2049	DEF_CMD("rxcsum6",	IFCAP_RXCSUM_IPV6,	setifcap),
2050	DEF_CMD("-rxcsum6",	IFCAP_RXCSUM_IPV6,	clearifcap),
2051	DEF_CMD("txcsum6",	IFCAP_TXCSUM_IPV6,	setifcap),
2052	DEF_CMD("-txcsum6",	IFCAP_TXCSUM_IPV6,	clearifcap),
2053	DEF_CMD("rxcsum",	IFCAP_RXCSUM,	setifcap),
2054	DEF_CMD("-rxcsum",	IFCAP_RXCSUM,	clearifcap),
2055	DEF_CMD("txcsum",	IFCAP_TXCSUM,	setifcap),
2056	DEF_CMD("-txcsum",	IFCAP_TXCSUM,	clearifcap),
2057	DEF_CMD("netcons",	IFCAP_NETCONS,	setifcap),
2058	DEF_CMD("-netcons",	IFCAP_NETCONS,	clearifcap),
2059	DEF_CMD_ARG("pcp",			setifpcp),
2060	DEF_CMD("-pcp", 0,			disableifpcp),
2061	DEF_CMD("polling",	IFCAP_POLLING,	setifcap),
2062	DEF_CMD("-polling",	IFCAP_POLLING,	clearifcap),
2063	DEF_CMD("tso6",		IFCAP_TSO6,	setifcap),
2064	DEF_CMD("-tso6",	IFCAP_TSO6,	clearifcap),
2065	DEF_CMD("tso4",		IFCAP_TSO4,	setifcap),
2066	DEF_CMD("-tso4",	IFCAP_TSO4,	clearifcap),
2067	DEF_CMD("tso",		IFCAP_TSO,	setifcap),
2068	DEF_CMD("-tso",		IFCAP_TSO,	clearifcap),
2069	DEF_CMD("toe",		IFCAP_TOE,	setifcap),
2070	DEF_CMD("-toe",		IFCAP_TOE,	clearifcap),
2071	DEF_CMD("lro",		IFCAP_LRO,	setifcap),
2072	DEF_CMD("-lro",		IFCAP_LRO,	clearifcap),
2073	DEF_CMD("txtls",	IFCAP_TXTLS,	setifcap),
2074	DEF_CMD("-txtls",	IFCAP_TXTLS,	clearifcap),
2075	DEF_CMD_SARG("rxtls",	IFCAP2_RXTLS4_NAME "," IFCAP2_RXTLS6_NAME,
2076	    setifcapnv),
2077	DEF_CMD_SARG("-rxtls",	"-"IFCAP2_RXTLS4_NAME ",-" IFCAP2_RXTLS6_NAME,
2078	    setifcapnv),
2079	DEF_CMD("wol",		IFCAP_WOL,	setifcap),
2080	DEF_CMD("-wol",		IFCAP_WOL,	clearifcap),
2081	DEF_CMD("wol_ucast",	IFCAP_WOL_UCAST,	setifcap),
2082	DEF_CMD("-wol_ucast",	IFCAP_WOL_UCAST,	clearifcap),
2083	DEF_CMD("wol_mcast",	IFCAP_WOL_MCAST,	setifcap),
2084	DEF_CMD("-wol_mcast",	IFCAP_WOL_MCAST,	clearifcap),
2085	DEF_CMD("wol_magic",	IFCAP_WOL_MAGIC,	setifcap),
2086	DEF_CMD("-wol_magic",	IFCAP_WOL_MAGIC,	clearifcap),
2087	DEF_CMD("txrtlmt",	IFCAP_TXRTLMT,	setifcap),
2088	DEF_CMD("-txrtlmt",	IFCAP_TXRTLMT,	clearifcap),
2089	DEF_CMD("txtlsrtlmt",	IFCAP_TXTLS_RTLMT,	setifcap),
2090	DEF_CMD("-txtlsrtlmt",	IFCAP_TXTLS_RTLMT,	clearifcap),
2091	DEF_CMD("hwrxtstmp",	IFCAP_HWRXTSTMP,	setifcap),
2092	DEF_CMD("-hwrxtstmp",	IFCAP_HWRXTSTMP,	clearifcap),
2093	DEF_CMD("normal",	IFF_LINK0,	clearifflags),
2094	DEF_CMD("compress",	IFF_LINK0,	setifflags),
2095	DEF_CMD("noicmp",	IFF_LINK1,	setifflags),
2096	DEF_CMD_ARG("mtu",			setifmtu),
2097	DEF_CMD_ARG("name",			setifname),
2098};
2099
2100static __constructor void
2101ifconfig_ctor(void)
2102{
2103	size_t i;
2104
2105	for (i = 0; i < nitems(basic_cmds);  i++)
2106		cmd_register(&basic_cmds[i]);
2107}
2108