3 /*-
4  * SPDX-License-Identifier: BSD-1-Clause
7  *	Berkeley Software Design, Inc.  All rights reserved.
15  * THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``AS IS'' AND
18  * ARE DISCLAIMED.  IN NO EVENT SHALL Berkeley Software Design, Inc. BE LIABLE
24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * try-and-error for region size.
50 #include "un-namespace.h"
57 #define	SA_LEN(sa)	(sa)->sa_len
60 #define	SALIGN	(sizeof(long) - 1)
61 #define	SA_RLEN(sa)	((sa)->sa_len ? (((sa)->sa_len + SALIGN) & ~SALIGN) : (SALIGN + 1))
92 	struct sockaddr_dl *dl;  in getifaddrs()  local
121 			return (-1);  in getifaddrs()
123 			return (-1);  in getifaddrs()
127 				return (-1);  in getifaddrs()
134 	for (next = buf; next < buf + needed; next += rtm->rtm_msglen) {  in getifaddrs()
136 		if (rtm->rtm_version != RTM_VERSION)  in getifaddrs()
138 		switch (rtm->rtm_type) {  in getifaddrs()
141 			if (ifm->ifm_addrs & RTA_IFP) {  in getifaddrs()
142 				idx = ifm->ifm_index;  in getifaddrs()
145 				dcnt += if_data->ifi_datalen;  in getifaddrs()
146 				dl = (struct sockaddr_dl *)IF_MSGHDRL_RTA(ifm);  in getifaddrs()
147 				dcnt += SA_RLEN((struct sockaddr *)(void*)dl) +  in getifaddrs()
149 				ncnt += dl->sdl_nlen + 1;  in getifaddrs()
156 			if (idx && ifam->ifam_index != idx)  in getifaddrs()
160 			if (idx == 0 || (ifam->ifam_addrs & RTA_MASKS) == 0)  in getifaddrs()
165 			dcnt += if_data->ifi_datalen + ALIGNBYTES;  in getifaddrs()
170 				if ((RTA_MASKS & ifam->ifam_addrs & (1 << i))  in getifaddrs()
182 				if ((RTA_MASKS & ifam->ifam_addrs & (1 << i))  in getifaddrs()
205 		return(-1);  in getifaddrs()
217 	for (next = buf; next < buf + needed; next += rtm->rtm_msglen) {  in getifaddrs()
219 		if (rtm->rtm_version != RTM_VERSION)  in getifaddrs()
221 		switch (rtm->rtm_type) {  in getifaddrs()
224 			if ((ifm->ifm_addrs & RTA_IFP) == 0) {  in getifaddrs()
229 			idx = ifm->ifm_index;  in getifaddrs()
230 			dl = (struct sockaddr_dl *)IF_MSGHDRL_RTA(ifm);  in getifaddrs()
233 			ift->ifa_name = names;  in getifaddrs()
234 			ift->ifa_flags = (int)ifm->ifm_flags;  in getifaddrs()
235 			memcpy(names, dl->sdl_data, (size_t)dl->sdl_nlen);  in getifaddrs()
236 			names[dl->sdl_nlen] = 0;  in getifaddrs()
237 			names += dl->sdl_nlen + 1;  in getifaddrs()
239 			ift->ifa_addr = (struct sockaddr *)(void *)data;  in getifaddrs()
240 			memcpy(data, dl, (size_t)SA_LEN((struct sockaddr *)  in getifaddrs()
241 			    (void *)dl));  in getifaddrs()
242 			data += SA_RLEN((struct sockaddr *)(void *)dl);  in getifaddrs()
246 			ift->ifa_data = data = (void *)ALIGN(data);  in getifaddrs()
247 			memcpy(data, if_data, if_data->ifi_datalen);  in getifaddrs()
248 			data += if_data->ifi_datalen;  in getifaddrs()
250 			ift = (ift->ifa_next = ift + 1);  in getifaddrs()
255 			if (idx && ifam->ifam_index != idx)  in getifaddrs()
258 			if (idx == 0 || (ifam->ifam_addrs & RTA_MASKS) == 0)  in getifaddrs()
260 			ift->ifa_name = cif->ifa_name;  in getifaddrs()
261 			ift->ifa_flags = cif->ifa_flags;  in getifaddrs()
262 			ift->ifa_data = NULL;  in getifaddrs()
268 				if ((RTA_MASKS & ifam->ifam_addrs & (1 << i))  in getifaddrs()
280 				if ((RTA_MASKS & ifam->ifam_addrs & (1 << i))  in getifaddrs()
287 					ift->ifa_addr =  in getifaddrs()
294 					ift->ifa_netmask =  in getifaddrs()
306 					ift->ifa_broadaddr =  in getifaddrs()
317 			ift->ifa_data = data = (void *)ALIGN(data);  in getifaddrs()
318 			memcpy(data, if_data, if_data->ifi_datalen);  in getifaddrs()
319 			data += if_data->ifi_datalen;  in getifaddrs()
321 			ift = (ift->ifa_next = ift + 1);  in getifaddrs()
328 	if (--ift >= ifa) {  in getifaddrs()
329 		ift->ifa_next = NULL;  in getifaddrs()