[mirror_frr.git] / zebra / if_ioctl.c

/*
 * Interface looking up by ioctl ().
 * Copyright (C) 1997, 98 Kunihiro Ishiguro
 *
 * This file is part of GNU Zebra.
 *
 * GNU Zebra is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2, or (at your option) any
 * later version.
 *
 * GNU Zebra is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; see the file COPYING; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <zebra.h>

#ifdef OPEN_BSD

#include "if.h"
#include "sockunion.h"
#include "prefix.h"
#include "ioctl.h"
#include "connected.h"
#include "memory.h"
#include "zebra_memory.h"
#include "log.h"
#include "vrf.h"
#include "vty.h"
#include "lib_errors.h"

#include "zebra/interface.h"
#include "zebra/rib.h"
#include "zebra/rt.h"
#include "zebra/zebra_errors.h"

#include <ifaddrs.h>

/* Interface looking up using infamous SIOCGIFCONF. */
static int interface_list_ioctl(void)
{
	int ret;
	int sock;
#define IFNUM_BASE 32
	int ifnum;
	struct ifreq *ifreq;
	struct ifconf ifconf;
	struct interface *ifp;
	int n;
	int lastlen;

	/* Normally SIOCGIFCONF works with AF_INET socket. */
	sock = socket(AF_INET, SOCK_DGRAM, 0);
	if (sock < 0) {
		flog_err_sys(EC_LIB_SOCKET,
			     "Can't make AF_INET socket stream: %s",
			     safe_strerror(errno));
		return -1;
	}

/* Set initial ifreq count.  This will be double when SIOCGIFCONF
   fail.  Solaris has SIOCGIFNUM. */
#ifdef SIOCGIFNUM
	ret = ioctl(sock, SIOCGIFNUM, &ifnum);
	if (ret < 0)
		ifnum = IFNUM_BASE;
	else
		ifnum++;
#else
	ifnum = IFNUM_BASE;
#endif /* SIOCGIFNUM */

	ifconf.ifc_buf = NULL;

	lastlen = 0;
	/* Loop until SIOCGIFCONF success. */
	for (;;) {
		ifconf.ifc_len = sizeof(struct ifreq) * ifnum;
		ifconf.ifc_buf =
			XREALLOC(MTYPE_TMP, ifconf.ifc_buf, ifconf.ifc_len);

		ret = ioctl(sock, SIOCGIFCONF, &ifconf);

		if (ret < 0) {
			flog_err_sys(EC_LIB_SYSTEM_CALL, "SIOCGIFCONF: %s",
				     safe_strerror(errno));
			goto end;
		}
		/* Repeatedly get info til buffer fails to grow. */
		if (ifconf.ifc_len > lastlen) {
			lastlen = ifconf.ifc_len;
			ifnum += 10;
			continue;
		}
		/* Success. */
		break;
	}

	/* Allocate interface. */
	ifreq = ifconf.ifc_req;

#ifdef OPEN_BSD
	for (n = 0; n < ifconf.ifc_len;) {
		unsigned int size;

		ifreq = (struct ifreq *)((caddr_t)ifconf.ifc_req + n);
		ifp = if_get_by_name(ifreq->ifr_name, VRF_DEFAULT);
		if_add_update(ifp);
		size = ifreq->ifr_addr.sa_len;
		if (size < sizeof(ifreq->ifr_addr))
			size = sizeof(ifreq->ifr_addr);
		size += sizeof(ifreq->ifr_name);
		n += size;
	}
#else
	for (n = 0; n < ifconf.ifc_len; n += sizeof(struct ifreq)) {
		ifp = if_get_by_name(ifreq->ifr_name, VRF_DEFAULT);
		if_add_update(ifp);
		ifreq++;
	}
#endif /* OPEN_BSD */

end:
	close(sock);
	XFREE(MTYPE_TMP, ifconf.ifc_buf);

	return ret;
}

/* Get interface's index by ioctl. */
static int if_get_index(struct interface *ifp)
{
	if_set_index(ifp, if_nametoindex(ifp->name));
	return ifp->ifindex;
}

#ifdef SIOCGIFHWADDR
static int if_get_hwaddr(struct interface *ifp)
{
	int ret;
	struct ifreq ifreq;
	int i;

	strncpy(ifreq.ifr_name, ifp->name, IFNAMSIZ);
	ifreq.ifr_addr.sa_family = AF_INET;

	/* Fetch Hardware address if available. */
	ret = vrf_if_ioctl(SIOCGIFHWADDR, (caddr_t)&ifreq, ifp->vrf_id);
	if (ret < 0)
		ifp->hw_addr_len = 0;
	else {
		memcpy(ifp->hw_addr, ifreq.ifr_hwaddr.sa_data, 6);

		for (i = 0; i < 6; i++)
			if (ifp->hw_addr[i] != 0)
				break;

		if (i == 6)
			ifp->hw_addr_len = 0;
		else
			ifp->hw_addr_len = 6;
	}
	return 0;
}
#endif /* SIOCGIFHWADDR */

static int if_getaddrs(void)
{
	int ret;
	struct ifaddrs *ifap;
	struct ifaddrs *ifapfree;
	struct interface *ifp;
	int prefixlen;

	ret = getifaddrs(&ifap);
	if (ret != 0) {
		flog_err_sys(EC_LIB_SYSTEM_CALL, "getifaddrs(): %s",
			     safe_strerror(errno));
		return -1;
	}

	for (ifapfree = ifap; ifap; ifap = ifap->ifa_next) {
		if (ifap->ifa_addr == NULL) {
			flog_err(
				EC_LIB_INTERFACE,
				"%s: nonsensical ifaddr with NULL ifa_addr, ifname %s",
				__func__,
				(ifap->ifa_name ? ifap->ifa_name : "(null)"));
			continue;
		}

		ifp = if_lookup_by_name(ifap->ifa_name, VRF_DEFAULT);
		if (ifp == NULL) {
			flog_err(EC_LIB_INTERFACE,
				 "if_getaddrs(): Can't lookup interface %s\n",
				 ifap->ifa_name);
			continue;
		}

		if (ifap->ifa_addr->sa_family == AF_INET) {
			struct sockaddr_in *addr;
			struct sockaddr_in *mask;
			struct sockaddr_in *dest;
			struct in_addr *dest_pnt;
			int flags = 0;

			addr = (struct sockaddr_in *)ifap->ifa_addr;
			mask = (struct sockaddr_in *)ifap->ifa_netmask;
			prefixlen = ip_masklen(mask->sin_addr);

			dest_pnt = NULL;

			if (if_is_pointopoint(ifp) && ifap->ifa_dstaddr
			    && !IPV4_ADDR_SAME(&addr->sin_addr,
					       &((struct sockaddr_in *)
							 ifap->ifa_dstaddr)
							->sin_addr)) {
				dest = (struct sockaddr_in *)ifap->ifa_dstaddr;
				dest_pnt = &dest->sin_addr;
				flags = ZEBRA_IFA_PEER;
			} else if (ifap->ifa_broadaddr
				   && !IPV4_ADDR_SAME(
					      &addr->sin_addr,
					      &((struct sockaddr_in *)
							ifap->ifa_broadaddr)
						       ->sin_addr)) {
				dest = (struct sockaddr_in *)
					       ifap->ifa_broadaddr;
				dest_pnt = &dest->sin_addr;
			}

			connected_add_ipv4(ifp, flags, &addr->sin_addr,
					   prefixlen, dest_pnt, NULL);
		}
		if (ifap->ifa_addr->sa_family == AF_INET6) {
			struct sockaddr_in6 *addr;
			struct sockaddr_in6 *mask;
			int flags = 0;

			addr = (struct sockaddr_in6 *)ifap->ifa_addr;
			mask = (struct sockaddr_in6 *)ifap->ifa_netmask;
			prefixlen = ip6_masklen(mask->sin6_addr);

#if defined(KAME)
			if (IN6_IS_ADDR_LINKLOCAL(&addr->sin6_addr)) {
				addr->sin6_scope_id =
					ntohs(*(uint16_t *)&addr->sin6_addr
						       .s6_addr[2]);
				addr->sin6_addr.s6_addr[2] =
					addr->sin6_addr.s6_addr[3] = 0;
			}
#endif

			connected_add_ipv6(ifp, flags, &addr->sin6_addr, NULL,
					   prefixlen, NULL);
		}
	}

	freeifaddrs(ifapfree);

	return 0;
}

/* Fetch interface information via ioctl(). */
static void interface_info_ioctl()
{
	struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT);
	struct interface *ifp;

	FOR_ALL_INTERFACES (vrf, ifp) {
		if_get_index(ifp);
#ifdef SIOCGIFHWADDR
		if_get_hwaddr(ifp);
#endif /* SIOCGIFHWADDR */
		if_get_flags(ifp);
		if_get_mtu(ifp);
		if_get_metric(ifp);
	}
}

/* Lookup all interface information. */
void interface_list(struct zebra_ns *zns)
{

	zlog_info("interface_list: NS %u", zns->ns_id);

/* Linux can do both proc & ioctl, ioctl is the only way to get
   interface aliases in 2.2 series kernels. */
#ifdef HAVE_PROC_NET_DEV
	interface_list_proc();
#endif /* HAVE_PROC_NET_DEV */
	interface_list_ioctl();

	/* After listing is done, get index, address, flags and other
	   interface's information. */
	interface_info_ioctl();

	if_getaddrs();

#if defined(HAVE_PROC_NET_IF_INET6)
	/* Linux provides interface's IPv6 address via
	   /proc/net/if_inet6. */
	ifaddr_proc_ipv6();
#endif /* HAVE_PROC_NET_IF_INET6 */
}

#endif /* OPEN_BSD */
Commit	Line	Data
718e3744	1	/*
	2	* Interface looking up by ioctl ().
	3	* Copyright (C) 1997, 98 Kunihiro Ishiguro
	4	*
	5	* This file is part of GNU Zebra.
	6	*
	7	* GNU Zebra is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; either version 2, or (at your option) any
	10	* later version.
	11	*
	12	* GNU Zebra is distributed in the hope that it will be useful, but
	13	* WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*
896014f4 DL	17	* You should have received a copy of the GNU General Public License along
	18	* with this program; see the file COPYING; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
718e3744	20	*/
	21
	22	#include <zebra.h>
	23
ddfeb486 DL	24	#ifdef OPEN_BSD
ddfeb486 DL	25
718e3744	26	#include "if.h"
	27	#include "sockunion.h"
	28	#include "prefix.h"
	29	#include "ioctl.h"
	30	#include "connected.h"
	31	#include "memory.h"
4a1ab8e4	32	#include "zebra_memory.h"
718e3744	33	#include "log.h"
8f7d9fc0	34	#include "vrf.h"
82283592	35	#include "vty.h"
43e52561	36	#include "lib_errors.h"
718e3744	37
718e3744	38	#include "zebra/interface.h"
8f7d9fc0	39	#include "zebra/rib.h"
f7dae312	40	#include "zebra/rt.h"
364fed6b	41	#include "zebra/zebra_errors.h"
718e3744	42
24f5e2fc DL	43	#include <ifaddrs.h>
24f5e2fc DL	44
718e3744	45	/* Interface looking up using infamous SIOCGIFCONF. */
d62a17ae	46	static int interface_list_ioctl(void)
718e3744	47	{
d62a17ae	48	int ret;
d62a17ae	49	int sock;
718e3744	50	#define IFNUM_BASE 32
d62a17ae	51	int ifnum;
	52	struct ifreq *ifreq;
	53	struct ifconf ifconf;
	54	struct interface *ifp;
	55	int n;
	56	int lastlen;
	57
	58	/* Normally SIOCGIFCONF works with AF_INET socket. */
	59	sock = socket(AF_INET, SOCK_DGRAM, 0);
	60	if (sock < 0) {
450971aa	61	flog_err_sys(EC_LIB_SOCKET,
9df414fe QY	62	"Can't make AF_INET socket stream: %s",
9df414fe QY	63	safe_strerror(errno));
d62a17ae	64	return -1;
	65	}
	66
	67	/* Set initial ifreq count. This will be double when SIOCGIFCONF
	68	fail. Solaris has SIOCGIFNUM. */
718e3744	69	#ifdef SIOCGIFNUM
d62a17ae	70	ret = ioctl(sock, SIOCGIFNUM, &ifnum);
	71	if (ret < 0)
	72	ifnum = IFNUM_BASE;
	73	else
	74	ifnum++;
718e3744	75	#else
d62a17ae	76	ifnum = IFNUM_BASE;
718e3744	77	#endif /* SIOCGIFNUM */
718e3744	78
d62a17ae	79	ifconf.ifc_buf = NULL;
	80
	81	lastlen = 0;
	82	/* Loop until SIOCGIFCONF success. */
	83	for (;;) {
	84	ifconf.ifc_len = sizeof(struct ifreq) * ifnum;
	85	ifconf.ifc_buf =
	86	XREALLOC(MTYPE_TMP, ifconf.ifc_buf, ifconf.ifc_len);
	87
	88	ret = ioctl(sock, SIOCGIFCONF, &ifconf);
	89
	90	if (ret < 0) {
450971aa	91	flog_err_sys(EC_LIB_SYSTEM_CALL, "SIOCGIFCONF: %s",
9df414fe	92	safe_strerror(errno));
d62a17ae	93	goto end;
	94	}
	95	/* Repeatedly get info til buffer fails to grow. */
	96	if (ifconf.ifc_len > lastlen) {
	97	lastlen = ifconf.ifc_len;
	98	ifnum += 10;
	99	continue;
	100	}
	101	/* Success. */
	102	break;
718e3744	103	}
718e3744	104
d62a17ae	105	/* Allocate interface. */
d62a17ae	106	ifreq = ifconf.ifc_req;
718e3744	107
718e3744	108	#ifdef OPEN_BSD
d62a17ae	109	for (n = 0; n < ifconf.ifc_len;) {
	110	unsigned int size;
	111
	112	ifreq = (struct ifreq *)((caddr_t)ifconf.ifc_req + n);
8f90d89b	113	ifp = if_get_by_name(ifreq->ifr_name, VRF_DEFAULT);
d62a17ae	114	if_add_update(ifp);
	115	size = ifreq->ifr_addr.sa_len;
	116	if (size < sizeof(ifreq->ifr_addr))
	117	size = sizeof(ifreq->ifr_addr);
	118	size += sizeof(ifreq->ifr_name);
	119	n += size;
	120	}
718e3744	121	#else
d62a17ae	122	for (n = 0; n < ifconf.ifc_len; n += sizeof(struct ifreq)) {
8f90d89b	123	ifp = if_get_by_name(ifreq->ifr_name, VRF_DEFAULT);
d62a17ae	124	if_add_update(ifp);
	125	ifreq++;
	126	}
718e3744	127	#endif /* OPEN_BSD */
718e3744	128
d62a17ae	129	end:
	130	close(sock);
	131	XFREE(MTYPE_TMP, ifconf.ifc_buf);
718e3744	132
d62a17ae	133	return ret;
718e3744	134	}
	135
	136	/* Get interface's index by ioctl. */
d62a17ae	137	static int if_get_index(struct interface *ifp)
718e3744	138	{
ff880b78	139	if_set_index(ifp, if_nametoindex(ifp->name));
d62a17ae	140	return ifp->ifindex;
718e3744	141	}
	142
	143	#ifdef SIOCGIFHWADDR
d62a17ae	144	static int if_get_hwaddr(struct interface *ifp)
718e3744	145	{
d62a17ae	146	int ret;
	147	struct ifreq ifreq;
	148	int i;
	149
	150	strncpy(ifreq.ifr_name, ifp->name, IFNAMSIZ);
	151	ifreq.ifr_addr.sa_family = AF_INET;
	152
	153	/* Fetch Hardware address if available. */
4db21619	154	ret = vrf_if_ioctl(SIOCGIFHWADDR, (caddr_t)&ifreq, ifp->vrf_id);
d62a17ae	155	if (ret < 0)
	156	ifp->hw_addr_len = 0;
	157	else {
	158	memcpy(ifp->hw_addr, ifreq.ifr_hwaddr.sa_data, 6);
	159
	160	for (i = 0; i < 6; i++)
	161	if (ifp->hw_addr[i] != 0)
	162	break;
	163
	164	if (i == 6)
	165	ifp->hw_addr_len = 0;
	166	else
	167	ifp->hw_addr_len = 6;
	168	}
	169	return 0;
718e3744	170	}
	171	#endif /* SIOCGIFHWADDR */
	172
d62a17ae	173	static int if_getaddrs(void)
718e3744	174	{
d62a17ae	175	int ret;
	176	struct ifaddrs *ifap;
	177	struct ifaddrs *ifapfree;
	178	struct interface *ifp;
	179	int prefixlen;
	180
	181	ret = getifaddrs(&ifap);
	182	if (ret != 0) {
450971aa	183	flog_err_sys(EC_LIB_SYSTEM_CALL, "getifaddrs(): %s",
09c866e3	184	safe_strerror(errno));
d62a17ae	185	return -1;
718e3744	186	}
718e3744	187
d62a17ae	188	for (ifapfree = ifap; ifap; ifap = ifap->ifa_next) {
d62a17ae	189	if (ifap->ifa_addr == NULL) {
af4c2728	190	flog_err(
450971aa	191	EC_LIB_INTERFACE,
d62a17ae	192	"%s: nonsensical ifaddr with NULL ifa_addr, ifname %s",
	193	__func__,
	194	(ifap->ifa_name ? ifap->ifa_name : "(null)"));
	195	continue;
	196	}
	197
	198	ifp = if_lookup_by_name(ifap->ifa_name, VRF_DEFAULT);
	199	if (ifp == NULL) {
450971aa	200	flog_err(EC_LIB_INTERFACE,
1c50c1c0 QY	201	"if_getaddrs(): Can't lookup interface %s\n",
1c50c1c0 QY	202	ifap->ifa_name);
d62a17ae	203	continue;
	204	}
	205
	206	if (ifap->ifa_addr->sa_family == AF_INET) {
	207	struct sockaddr_in *addr;
	208	struct sockaddr_in *mask;
	209	struct sockaddr_in *dest;
	210	struct in_addr *dest_pnt;
	211	int flags = 0;
	212
	213	addr = (struct sockaddr_in *)ifap->ifa_addr;
	214	mask = (struct sockaddr_in *)ifap->ifa_netmask;
	215	prefixlen = ip_masklen(mask->sin_addr);
	216
	217	dest_pnt = NULL;
	218
608105a7	219	if (if_is_pointopoint(ifp) && ifap->ifa_dstaddr
d62a17ae	220	&& !IPV4_ADDR_SAME(&addr->sin_addr,
	221	&((struct sockaddr_in *)
	222	ifap->ifa_dstaddr)
	223	->sin_addr)) {
	224	dest = (struct sockaddr_in *)ifap->ifa_dstaddr;
	225	dest_pnt = &dest->sin_addr;
	226	flags = ZEBRA_IFA_PEER;
	227	} else if (ifap->ifa_broadaddr
	228	&& !IPV4_ADDR_SAME(
	229	&addr->sin_addr,
	230	&((struct sockaddr_in *)
	231	ifap->ifa_broadaddr)
	232	->sin_addr)) {
	233	dest = (struct sockaddr_in *)
	234	ifap->ifa_broadaddr;
	235	dest_pnt = &dest->sin_addr;
	236	}
	237
	238	connected_add_ipv4(ifp, flags, &addr->sin_addr,
	239	prefixlen, dest_pnt, NULL);
	240	}
	241	if (ifap->ifa_addr->sa_family == AF_INET6) {
	242	struct sockaddr_in6 *addr;
	243	struct sockaddr_in6 *mask;
d62a17ae	244	int flags = 0;
	245
	246	addr = (struct sockaddr_in6 *)ifap->ifa_addr;
	247	mask = (struct sockaddr_in6 *)ifap->ifa_netmask;
	248	prefixlen = ip6_masklen(mask->sin6_addr);
	249
ab836aab	250	#if defined(KAME)
d62a17ae	251	if (IN6_IS_ADDR_LINKLOCAL(&addr->sin6_addr)) {
d62a17ae	252	addr->sin6_scope_id =
d7c0a89a	253	ntohs((uint16_t )&addr->sin6_addr
d62a17ae	254	.s6_addr[2]);
	255	addr->sin6_addr.s6_addr[2] =
	256	addr->sin6_addr.s6_addr[3] = 0;
	257	}
	258	#endif
	259
60c0687a	260	connected_add_ipv6(ifp, flags, &addr->sin6_addr, NULL,
608105a7	261	prefixlen, NULL);
d62a17ae	262	}
718e3744	263	}
718e3744	264
d62a17ae	265	freeifaddrs(ifapfree);
718e3744	266
d62a17ae	267	return 0;
718e3744	268	}
718e3744	269
718e3744	270	/* Fetch interface information via ioctl(). */
d62a17ae	271	static void interface_info_ioctl()
718e3744	272	{
f4e14fdb	273	struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT);
d62a17ae	274	struct interface *ifp;
d62a17ae	275
451fda4f	276	FOR_ALL_INTERFACES (vrf, ifp) {
d62a17ae	277	if_get_index(ifp);
718e3744	278	#ifdef SIOCGIFHWADDR
d62a17ae	279	if_get_hwaddr(ifp);
718e3744	280	#endif /* SIOCGIFHWADDR */
d62a17ae	281	if_get_flags(ifp);
	282	if_get_mtu(ifp);
	283	if_get_metric(ifp);
	284	}
718e3744	285	}
	286
	287	/* Lookup all interface information. */
d62a17ae	288	void interface_list(struct zebra_ns *zns)
718e3744	289	{
12f6fb97	290
d62a17ae	291	zlog_info("interface_list: NS %u", zns->ns_id);
12f6fb97	292
d62a17ae	293	/* Linux can do both proc & ioctl, ioctl is the only way to get
d62a17ae	294	interface aliases in 2.2 series kernels. */
718e3744	295	#ifdef HAVE_PROC_NET_DEV
d62a17ae	296	interface_list_proc();
718e3744	297	#endif /* HAVE_PROC_NET_DEV */
d62a17ae	298	interface_list_ioctl();
718e3744	299
d62a17ae	300	/* After listing is done, get index, address, flags and other
	301	interface's information. */
	302	interface_info_ioctl();
718e3744	303
d62a17ae	304	if_getaddrs();
718e3744	305
56c1f7d8	306	#if defined(HAVE_PROC_NET_IF_INET6)
d62a17ae	307	/* Linux provides interface's IPv6 address via
	308	/proc/net/if_inet6. */
	309	ifaddr_proc_ipv6();
56c1f7d8	310	#endif /* HAVE_PROC_NET_IF_INET6 */
718e3744	311	}
ddfeb486 DL	312
ddfeb486 DL	313	#endif /* OPEN_BSD */