1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
90 	if (modfind("netlink") == -1 && errno == ENOENT) {  in nl_init_socket()
92 		if (kldload("netlink") == -1)  in nl_init_socket()
98 	err(1, "unable to open netlink socket");  in nl_init_socket()
108 	ctx->io_ss = &ss;  in ifconfig_nl()
113 	ctx->io_ss = NULL;  in ifconfig_nl()
138  * Returns ifmap ifindex->snl_parsed_link.
148 	hdr->nlmsg_flags |= NLM_F_DUMP;  in prepare_ifmap()
154 	uint32_t nlmsg_seq = hdr->nlmsg_seq;  in prepare_ifmap()
161 		if (!snl_parse_nlmsg(ss, hdr, &snl_rtm_link_parser, &iface->link))  in prepare_ifmap()
163 		if (iface->link.ifi_index >= ifmap->size) {  in prepare_ifmap()
164 			size_t new_size = MAX(ifmap->size, 32);  in prepare_ifmap()
166 			while (new_size <= iface->link.ifi_index + 1)  in prepare_ifmap()
170 			memcpy(ifaces, ifmap->ifaces, ifmap->size * sizeof(void *));  in prepare_ifmap()
171 			ifmap->ifaces = ifaces;  in prepare_ifmap()
172 			ifmap->size = new_size;  in prepare_ifmap()
174 		ifmap->ifaces[iface->link.ifi_index] = iface;  in prepare_ifmap()
175 		ifmap->count++;  in prepare_ifmap()
176 		iface->idx = ifmap->count;  in prepare_ifmap()
195 	hdr = snl_read_reply(ss, hdr->nlmsg_seq);  in if_nametoindex_nl()
196 	if (hdr->nlmsg_type != NL_RTM_NEWLINK)  in if_nametoindex_nl()
224 	hdr->nlmsg_flags |= NLM_F_DUMP;  in prepare_ifaddrs()
230 	uint32_t nlmsg_seq = hdr->nlmsg_seq;  in prepare_ifaddrs()
237 		if (!snl_parse_nlmsg(ss, hdr, &snl_rtm_addr_parser, &ifa->addr))  in prepare_ifaddrs()
240 		const uint32_t ifindex = ifa->addr.ifa_index;  in prepare_ifaddrs()
241 		if (ifindex >= ifmap->size || ifmap->ifaces[ifindex] == NULL)  in prepare_ifaddrs()
243 		struct iface *iface = ifmap->ifaces[ifindex];  in prepare_ifaddrs()
244 		ifa->next = iface->ifa;  in prepare_ifaddrs()
245 		ifa->idx = ++count;  in prepare_ifaddrs()
246 		iface->ifa = ifa;  in prepare_ifaddrs()
247 		iface->ifa_count++;  in prepare_ifaddrs()
254 	if_link_t *link = &iface->link;  in match_iface()
256 	if (args->ifname != NULL && strcmp(args->ifname, link->ifla_ifname))  in match_iface()
259 	if (!match_if_flags(args, link->ifi_flags))  in match_iface()
262 	if (!group_member(link->ifla_ifname, args->matchgroup, args->nogroup))  in match_iface()
265 	if (args->afp == NULL)  in match_iface()
268 	if (!strcmp(args->afp->af_name, "ether")) {  in match_iface()
269 		if (link->ifla_address == NULL)  in match_iface()
275 			.sdl_type = convert_iftype(link->ifi_type),  in match_iface()
276 			.sdl_alen = NLA_DATA_LEN(link->ifla_address),  in match_iface()
279 	} else if (args->afp->af_af == AF_LINK)  in match_iface()
283 		 * circuit on RTM_GETLINK has provided us an address.  in match_iface()
285 		return (link->ifla_address != NULL);  in match_iface()
287 	for (struct ifa *ifa = iface->ifa; ifa != NULL; ifa = ifa->next) {  in match_iface()
288 		if (args->afp->af_af == ifa->addr.ifa_family)  in match_iface()
295 /* Sort according to the kernel-provided order */
302 	return ((a->idx > b->idx) * 2 - 1);  in cmp_iface()
311 	if (a->addr.ifa_family != b->addr.ifa_family)  in cmp_ifaddr()
312 		return ((a->addr.ifa_family > b->addr.ifa_family) * 2 - 1);  in cmp_ifaddr()
313 	return ((a->idx > b->idx) * 2 - 1);  in cmp_ifaddr()
319 	if (iface->ifa_count == 0)  in sort_iface_ifaddrs()
322 	struct ifa **sorted_ifaddrs = snl_allocz(ss, iface->ifa_count * sizeof(void *));  in sort_iface_ifaddrs()
323 	struct ifa *ifa = iface->ifa;  in sort_iface_ifaddrs()
325 	for (uint32_t i = 0; i < iface->ifa_count; i++) {  in sort_iface_ifaddrs()
326 		struct ifa *ifa_next = ifa->next;  in sort_iface_ifaddrs()
329 		ifa->next = NULL;  in sort_iface_ifaddrs()
332 	qsort(sorted_ifaddrs, iface->ifa_count, sizeof(void *), cmp_ifaddr);  in sort_iface_ifaddrs()
334 	iface->ifa = ifa;  in sort_iface_ifaddrs()
335 	for (uint32_t i = 1; i < iface->ifa_count; i++) {  in sort_iface_ifaddrs()
336 		ifa->next = sorted_ifaddrs[i];  in sort_iface_ifaddrs()
344 	uint32_t sz_u32 = roundup2(link->iflaf_caps.nla_bitset_size, 32) / 32;  in print_ifcaps()
347 		uint32_t *caps = link->iflaf_caps.nla_bitset_value;  in print_ifcaps()
354 	if (ctx->args->supmedia && sz_u32 > 0) {  in print_ifcaps()
355 		uint32_t *caps = link->iflaf_caps.nla_bitset_mask;  in print_ifcaps()
366 	if_link_t *link = &iface->link;  in status_nl()
367 	struct ifconfig_args *args = ctx->args;  in status_nl()
370 	printf("%s: ", link->ifla_ifname);  in status_nl()
372 	printf("flags=%x", link->ifi_flags);  in status_nl()
373 	print_bits("IFF", &link->ifi_flags, 1, IFFBITS, nitems(IFFBITS));  in status_nl()
376 	printf(" mtu %d\n", link->ifla_mtu);  in status_nl()
378 	if (link->ifla_ifalias != NULL)  in status_nl()
379 		printf("\tdescription: %s\n", link->ifla_ifalias);  in status_nl()
384 	if (args->allfamilies | (args->afp != NULL && args->afp->af_af == AF_LINK)) {  in status_nl()
385 		/* Start with link-level */  in status_nl()
387 		if (p != NULL && link->ifla_address != NULL)  in status_nl()
388 			p->af_status(ctx, link, NULL);  in status_nl()
391 	sort_iface_ifaddrs(ctx->io_ss, iface);  in status_nl()
393 	for (struct ifa *ifa = iface->ifa; ifa != NULL; ifa = ifa->next) {  in status_nl()
394 		if (args->allfamilies) {  in status_nl()
395 			const struct afswtch *p = af_getbyfamily(ifa->addr.ifa_family);  in status_nl()
398 				p->af_status(ctx, link, &ifa->addr);  in status_nl()
399 		} else if (args->afp->af_af == ifa->addr.ifa_family) {  in status_nl()
400 			const struct afswtch *p = args->afp;  in status_nl()
402 			p->af_status(ctx, link, &ifa->addr);  in status_nl()
407 	if (args->allfamilies)  in status_nl()
409 	else if (args->afp->af_other_status != NULL)  in status_nl()
410 		args->afp->af_other_status(ctx);  in status_nl()
413 	if (args->drivername || args->verbose) {  in status_nl()
414 		if (ifconfig_get_orig_name(lifh, link->ifla_ifname,  in status_nl()
429 	if (args->verbose > 0)  in status_nl()
457 	struct iface **sorted_ifaces = snl_allocz(&ss, ifmap->count * sizeof(void *));  in list_interfaces_nl()
458 	for (uint32_t i = 0, num = 0; i < ifmap->size; i++) {  in list_interfaces_nl()
459 		if (ifmap->ifaces[i] != NULL) {  in list_interfaces_nl()
460 			sorted_ifaces[num++] = ifmap->ifaces[i];  in list_interfaces_nl()
461 			if (num == ifmap->count)  in list_interfaces_nl()
465 	qsort(sorted_ifaces, ifmap->count, sizeof(void *), cmp_iface);  in list_interfaces_nl()
468 	for (uint32_t i = 0, num = 0; i < ifmap->count; i++) {  in list_interfaces_nl()
474 		ctx->ifname = iface->link.ifla_ifname;  in list_interfaces_nl()
476 		if (args->namesonly) {  in list_interfaces_nl()
479 			fputs(iface->link.ifla_ifname, stdout);  in list_interfaces_nl()
480 		} else if (args->argc == 0)  in list_interfaces_nl()
483 			ifconfig_ioctl(ctx, 0, args->afp);  in list_interfaces_nl()
485 	if (args->namesonly)  in list_interfaces_nl()
488 	close(ctx->io_s);  in list_interfaces_nl()