isc/unix/ifiter_ioctl.c

132 getbuf4(isc_interfaceiter_t *iter) {
135 	iter->bufsize = IFCONF_BUFSIZE_INITIAL;
138 		iter->buf = isc_mem_get(iter->mctx, iter->bufsize);
139 		if (iter->buf == NULL)
142 		memset(&iter->ifc.ifc_len, 0, sizeof(iter->ifc.ifc_len));
143 		iter->ifc.ifc_len = iter->bufsize;
144 		iter->ifc.ifc_buf = iter->buf;
150 		if (isc_ioctl(iter->socket, SIOCGIFCONF, (char *)&iter->ifc)
176 			if (iter->ifc.ifc_len + 2 * sizeof(struct ifreq)
177 			    < iter->bufsize)
180 		if (iter->bufsize >= IFCONF_BUFSIZE_MAX) {
191 		isc_mem_put(iter->mctx, iter->buf, iter->bufsize);
193 		iter->bufsize *= 2;
198 	isc_mem_put(iter->mctx, iter->buf, iter->bufsize);
199 	iter->buf = NULL;
205 getbuf6(isc_interfaceiter_t *iter) {
209 	iter->bufsize6 = IFCONF_BUFSIZE_INITIAL;
212 		iter->buf6 = isc_mem_get(iter->mctx, iter->bufsize6);
213 		if (iter->buf6 == NULL)
216 		memset(&iter->lifc, 0, sizeof(iter->lifc));
218 		iter->lifc.lifc_family = AF_INET6;
221 		iter->lifc.lifc_flags = 0;
223 		iter->lifc.lifc_len = iter->bufsize6;
224 		iter->lifc.lifc_buf = iter->buf6;
230 		if (isc_ioctl(iter->socket6, SIOCGLIFCONF, (char *)&iter->lifc)
277 			if (iter->lifc.lifc_len + 2 * sizeof(struct LIFREQ)
278 			    < iter->bufsize6)
281 		if (iter->bufsize6 >= IFCONF_BUFSIZE_MAX) {
293 		isc_mem_put(iter->mctx, iter->buf6, iter->bufsize6);
295 		iter->bufsize6 *= 2;
298 	if (iter->lifc.lifc_len != 0)
299 		iter->mode = 6;
303 	isc_mem_put(iter->mctx, iter->buf6, iter->bufsize6);
304 	iter->buf6 = NULL;
311 	isc_interfaceiter_t *iter;
319 	iter = isc_mem_get(mctx, sizeof(*iter));
320 	if (iter == NULL)
323 	iter->mctx = mctx;
324 	iter->mode = 4;
325 	iter->buf = NULL;
326 	iter->pos = (unsigned int) -1;
328 	iter->buf6 = NULL;
329 	iter->pos6 = (unsigned int) -1;
330 	iter->result6 = ISC_R_NOMORE;
331 	iter->socket6 = -1;
332 	iter->first6 = ISC_FALSE;
348 		if ((iter->socket6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
360 		result = iter->result6 = getbuf6(iter);
365 	if ((iter->socket = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
377 	result = getbuf4(iter);
386 	iter->clua_context = -1;
387 	iter->clua_done = ISC_TRUE;
390 	iter->proc = fopen("/proc/net/if_inet6", "r");
391 	iter->valid = ISC_R_FAILURE;
393 	iter->result = ISC_R_FAILURE;
395 	iter->magic = IFITER_MAGIC;
396 	*iterp = iter;
400 	if (iter->buf != NULL)
401 		isc_mem_put(mctx, iter->buf, iter->bufsize);
402 	(void) close(iter->socket);
406 	if (iter->buf6 != NULL)
407 		isc_mem_put(mctx, iter->buf6, iter->bufsize6);
409 	if (iter->socket6 != -1)
410 		(void) close(iter->socket6);
414 	isc_mem_put(mctx, iter, sizeof(*iter));
426 internal_current_clusteralias(isc_interfaceiter_t *iter) {
428 	if (clua_getaliasinfo(&iter->clua_sa, &ci) != CLUA_SUCCESS)
430 	memset(&iter->current, 0, sizeof(iter->current));
431 	iter->current.af = iter->clua_sa.sa_family;
432 	memset(iter->current.name, 0, sizeof(iter->current.name));
433 	sprintf(iter->current.name, "clua%d", ci.aliasid);
434 	iter->current.flags = INTERFACE_F_UP;
435 	get_inaddr(&iter->current.address, &ci.addr);
436 	get_inaddr(&iter->current.netmask, &ci.netmask);
442  * Get information about the current interface to iter->current.
450 internal_current4(isc_interfaceiter_t *iter) {
462 	REQUIRE(VALID_IFITER(iter));
464 	if (iter->ifc.ifc_len == 0 ||
465 	    iter->pos == (unsigned int)iter->ifc.ifc_len) {
467 		return (linux_if_inet6_current(iter));
473 	INSIST( iter->pos < (unsigned int) iter->ifc.ifc_len);
475 	ifrp = (void *)((char *) iter->ifc.ifc_req + iter->pos);
488 	memset(&iter->current, 0, sizeof(iter->current));
489 	iter->current.af = family;
491 	INSIST(sizeof(ifreq.ifr_name) <= sizeof(iter->current.name));
492 	memset(iter->current.name, 0, sizeof(iter->current.name));
493 	memcpy(iter->current.name, ifreq.ifr_name, sizeof(ifreq.ifr_name));
495 	get_addr(family, &iter->current.address,
503 		if (iter->current.address.type.in.s_addr == htonl(INADDR_ANY))
507 		if (memcmp(&iter->current.address.type.in6, &in6addr_any,
517 	iter->current.flags = 0;
524 	if (isc_ioctl(iter->socket, SIOCGIFFLAGS, (char *) &ifreq) < 0) {
533 		iter->current.flags |= INTERFACE_F_UP;
537 		iter->current.flags |= INTERFACE_F_POINTTOPOINT;
541 		iter->current.flags |= INTERFACE_F_LOOPBACK;
544 		iter->current.flags |= INTERFACE_F_BROADCAST;
548 		iter->current.flags |= INTERFACE_F_MULTICAST;
556 	memcpy(lifreq.lifr_name, iter->current.name, sizeof(lifreq.lifr_name));
557 	memcpy(&lifreq.lifr_addr, &iter->current.address.type.in6,
558 	       sizeof(iter->current.address.type.in6));
560 	if (isc_ioctl(iter->socket, SIOCGLIFADDR, &lifreq) < 0) {
569 	isc_netaddr_format(&iter->current.address, sabuf, sizeof(sabuf));
584 	iter->current.netmask.family = family;
593 		iter->current.netmask.type.in6.s6_addr[i] = (~0 << bits) & 0xff;
596 	iter->current.ifindex = if_nametoindex(iter->current.name);
607 	if ((iter->current.flags & INTERFACE_F_POINTTOPOINT) != 0) {
613 		if (isc_ioctl(iter->socket, SIOCGIFDSTADDR, (char *)&ifreq)
625 		get_addr(family, &iter->current.dstaddress,
630 	if ((iter->current.flags & INTERFACE_F_BROADCAST) != 0) {
636 		if (isc_ioctl(iter->socket, SIOCGIFBRDADDR, (char *)&ifreq)
648 		get_addr(family, &iter->current.broadcast,
662 	if (isc_ioctl(iter->socket, SIOCGIFNETMASK, (char *)&ifreq) < 0) {
672 	get_addr(family, &iter->current.netmask,
675 	iter->current.ifindex = if_nametoindex(iter->current.name);
682 internal_current6(isc_interfaceiter_t *iter) {
689 	REQUIRE(VALID_IFITER(iter));
690 	if (iter->result6 != ISC_R_SUCCESS)
691 		return (iter->result6);
692 	REQUIRE(iter->pos6 < (unsigned int) iter->lifc.lifc_len);
694 	ifrp = (void *)((char *)iter->lifc.lifc_req + iter->pos6);
707 	memset(&iter->current, 0, sizeof(iter->current));
708 	iter->current.af = family;
710 	INSIST(sizeof(lifreq.lifr_name) <= sizeof(iter->current.name));
711 	memset(iter->current.name, 0, sizeof(iter->current.name));
712 	memcpy(iter->current.name, lifreq.lifr_name, sizeof(lifreq.lifr_name));
714 	get_addr(family, &iter->current.address,
717 	if (isc_netaddr_islinklocal(&iter->current.address))
718 		isc_netaddr_setzone(&iter->current.address,
726 		if (iter->current.address.type.in.s_addr == htonl(INADDR_ANY))
730 		if (memcmp(&iter->current.address.type.in6, &in6addr_any,
740 	iter->current.flags = 0;
743 		fd = iter->socket6;
745 		fd = iter->socket;
761 		iter->current.flags |= INTERFACE_F_UP;
765 		iter->current.flags |= INTERFACE_F_POINTTOPOINT;
769 		iter->current.flags |= INTERFACE_F_LOOPBACK;
772 		iter->current.flags |= INTERFACE_F_BROADCAST;
777 		iter->current.flags |= INTERFACE_F_MULTICAST;
785 	if ((iter->current.flags & INTERFACE_F_POINTTOPOINT) != 0) {
803 		get_addr(family, &iter->current.dstaddress,
810 	if ((iter->current.flags & INTERFACE_F_BROADCAST) != 0) {
816 		if (isc_ioctl(iter->socket, SIOCGLIFBRDADDR, (char *)&lifreq)
828 		get_addr(family, &iter->current.broadcast,
849 		iter->current.netmask.family = family;
853 			iter->current.netmask.type.in6.s6_addr[i / 8] =
857 		iter->current.ifindex = if_nametoindex(iter->current.name);
878 	get_addr(family, &iter->current.netmask,
882 	iter->current.ifindex = if_nametoindex(iter->current.name);
889 internal_current(isc_interfaceiter_t *iter) {
891 	if (iter->mode == 6) {
892 		iter->result6 = internal_current6(iter);
893 		if (iter->result6 != ISC_R_NOMORE)
894 			return (iter->result6);
898 	if (!iter->clua_done)
899 		return(internal_current_clusteralias(iter));
901 	return (internal_current4(iter));
912 internal_next4(isc_interfaceiter_t *iter) {
917 	if (iter->pos < (unsigned int) iter->ifc.ifc_len) {
919 		ifrp = (struct ifreq *)((char *) iter->ifc.ifc_req + iter->pos);
922 			iter->pos += sizeof(ifrp->ifr_name) +
926 			iter->pos += sizeof(struct ifreq);
929 		INSIST(iter->pos == (unsigned int) iter->ifc.ifc_len);
931 		return (linux_if_inet6_next(iter));
941 internal_next6(isc_interfaceiter_t *iter) {
946 	if (iter->result6 != ISC_R_SUCCESS && iter->result6 != ISC_R_IGNORE)
947 		return (iter->result6);
949 	REQUIRE(iter->pos6 < (unsigned int) iter->lifc.lifc_len);
952 	ifrp = (struct LIFREQ *)((char *) iter->lifc.lifc_req + iter->pos6);
955 		iter->pos6 += sizeof(ifrp->lifr_name) + ifrp->lifr_addr.sa_len;
958 		iter->pos6 += sizeof(struct LIFREQ);
960 	if (iter->pos6 >= (unsigned int) iter->lifc.lifc_len)
968 internal_next(isc_interfaceiter_t *iter) {
973 	if (iter->mode == 6) {
974 		iter->result6 = internal_next6(iter);
975 		if (iter->result6 != ISC_R_NOMORE)
976 			return (iter->result6);
977 		if (iter->first6) {
978 			iter->first6 = ISC_FALSE;
984 	if (!iter->clua_done) {
985 		clua_result = clua_getaliasaddress(&iter->clua_sa,
986 						   &iter->clua_context);
988 			iter->clua_done = ISC_TRUE;
992 	return (internal_next4(iter));
996 internal_destroy(isc_interfaceiter_t *iter) {
997 	(void) close(iter->socket);
999 	if (iter->socket6 != -1)
1000 		(void) close(iter->socket6);
1001 	if (iter->buf6 != NULL) {
1002 		isc_mem_put(iter->mctx, iter->buf6, iter->bufsize6);
1006 	if (iter->proc != NULL)
1007 		fclose(iter->proc);
1012 void internal_first(isc_interfaceiter_t *iter) {
1016 	iter->pos = 0;
1018 	iter->pos6 = 0;
1019 	if (iter->result6 == ISC_R_NOMORE)
1020 		iter->result6 = ISC_R_SUCCESS;
1021 	iter->first6 = ISC_TRUE;
1024 	iter->clua_context = 0;
1025 	clua_result = clua_getaliasaddress(&iter->clua_sa,
1026 					   &iter->clua_context);
1027 	iter->clua_done = ISC_TF(clua_result != CLUA_SUCCESS);
1030 	linux_if_inet6_first(iter);