[mirror_frr.git] / isisd / isis_bpf.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * IS-IS Rout(e)ing protocol - isis_bpf.c
 *
 * Copyright (C) 2001,2002    Sampo Saaristo
 *                            Tampere University of Technology
 *                            Institute of Communications Engineering
 */

#include <zebra.h>
#if ISIS_METHOD == ISIS_METHOD_BPF
#include <net/if.h>
#include <netinet/if_ether.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <net/bpf.h>

#include "log.h"
#include "network.h"
#include "stream.h"
#include "if.h"
#include "lib_errors.h"

#include "isisd/isis_constants.h"
#include "isisd/isis_common.h"
#include "isisd/isis_circuit.h"
#include "isisd/isis_flags.h"
#include "isisd/isisd.h"
#include "isisd/isis_constants.h"
#include "isisd/isis_circuit.h"
#include "isisd/isis_network.h"
#include "isisd/isis_pdu.h"

#include "privs.h"

struct bpf_insn llcfilter[] = {
	BPF_STMT(BPF_LD + BPF_B + BPF_ABS,
		 ETHER_HDR_LEN), /* check first byte */
	BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, ISO_SAP, 0, 5),
	BPF_STMT(BPF_LD + BPF_B + BPF_ABS, ETHER_HDR_LEN + 1),
	BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, ISO_SAP, 0,
		 3), /* check second byte */
	BPF_STMT(BPF_LD + BPF_B + BPF_ABS, ETHER_HDR_LEN + 2),
	BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, 0x03, 0, 1), /* check third byte */
	BPF_STMT(BPF_RET + BPF_K, (unsigned int)-1),
	BPF_STMT(BPF_RET + BPF_K, 0)};
unsigned int readblen = 0;
uint8_t *readbuff = NULL;

/*
 * Table 9 - Architectural constants for use with ISO 8802 subnetworks
 * ISO 10589 - 8.4.8
 */

static const uint8_t ALL_L1_ISS[6] = {0x01, 0x80, 0xC2, 0x00, 0x00, 0x14};
static const uint8_t ALL_L2_ISS[6] = {0x01, 0x80, 0xC2, 0x00, 0x00, 0x15};
static char sock_buff[16384];

static int open_bpf_dev(struct isis_circuit *circuit)
{
	int i = 0, fd;
	char bpfdev[128];
	struct ifreq ifr;
	unsigned int blen, immediate;
#ifdef BIOCSSEESENT
	unsigned int seesent;
#endif
	struct timeval timeout;
	struct bpf_program bpf_prog;

	do {
		(void)snprintf(bpfdev, sizeof(bpfdev), "/dev/bpf%d", i++);
		fd = open(bpfdev, O_RDWR);
	} while (fd < 0 && errno == EBUSY);

	if (fd < 0) {
		zlog_warn("open_bpf_dev(): failed to create bpf socket: %s",
			  safe_strerror(errno));
		return ISIS_WARNING;
	}

	zlog_debug("Opened BPF device %s", bpfdev);

	memcpy(ifr.ifr_name, circuit->interface->name, sizeof(ifr.ifr_name));
	if (ioctl(fd, BIOCSETIF, (caddr_t)&ifr) < 0) {
		zlog_warn("open_bpf_dev(): failed to bind to interface: %s",
			  safe_strerror(errno));
		return ISIS_WARNING;
	}

	if (ioctl(fd, BIOCGBLEN, (caddr_t)&blen) < 0) {
		zlog_warn("failed to get BPF buffer len");
		blen = circuit->interface->mtu;
	}

	readblen = blen;

	if (readbuff == NULL)
		readbuff = malloc(blen);

	zlog_debug("BPF buffer len = %u", blen);

	/*  BPF(4): reads return immediately upon packet reception.
	 *  Otherwise, a read will block until either the kernel
	 *  buffer becomes full or a timeout occurs.
	 */
	immediate = 1;
	if (ioctl(fd, BIOCIMMEDIATE, (caddr_t)&immediate) < 0) {
		zlog_warn("failed to set BPF dev to immediate mode");
	}

#ifdef BIOCSSEESENT
	/*
	 * We want to see only incoming packets
	 */
	seesent = 0;
	if (ioctl(fd, BIOCSSEESENT, (caddr_t)&seesent) < 0) {
		zlog_warn("failed to set BPF dev to incoming only mode");
	}
#endif

	/*
	 * ...but all of them
	 */
	if (ioctl(fd, BIOCPROMISC) < 0) {
		zlog_warn("failed to set BPF dev to promiscuous mode");
	}

	/*
	 * If the buffer length is smaller than our mtu, lets try to increase it
	 */
	if (blen < circuit->interface->mtu) {
		if (ioctl(fd, BIOCSBLEN, &circuit->interface->mtu) < 0) {
			zlog_warn("failed to set BPF buffer len (%u to %u)",
				  blen, circuit->interface->mtu);
		}
	}

	/*
	 * Set a timeout parameter - hope this helps select()
	 */
	timeout.tv_sec = 600;
	timeout.tv_usec = 0;
	if (ioctl(fd, BIOCSRTIMEOUT, (caddr_t)&timeout) < 0) {
		zlog_warn("failed to set BPF device timeout");
	}

	/*
	 * And set the filter
	 */
	memset(&bpf_prog, 0, sizeof(bpf_prog));
	bpf_prog.bf_len = 8;
	bpf_prog.bf_insns = &(llcfilter[0]);
	if (ioctl(fd, BIOCSETF, (caddr_t)&bpf_prog) < 0) {
		zlog_warn("%s: failed to install filter: %s", __func__,
			  safe_strerror(errno));
		return ISIS_WARNING;
	}

	assert(fd > 0);

	circuit->fd = fd;

	return ISIS_OK;
}

/*
 * Create the socket and set the tx/rx funcs
 */
int isis_sock_init(struct isis_circuit *circuit)
{
	int retval = ISIS_OK;

	frr_with_privs(&isisd_privs) {

		retval = open_bpf_dev(circuit);

		if (retval != ISIS_OK) {
			zlog_warn("%s: could not initialize the socket",
				  __func__);
			break;
		}

		if (if_is_broadcast(circuit->interface)) {
			circuit->tx = isis_send_pdu_bcast;
			circuit->rx = isis_recv_pdu_bcast;
		} else {
			zlog_warn("%s: unknown circuit type", __func__);
			retval = ISIS_WARNING;
			break;
		}
	}

	return retval;
}

int isis_recv_pdu_bcast(struct isis_circuit *circuit, uint8_t *ssnpa)
{
	int bytesread = 0, bytestoread = 0, offset, one = 1;
	uint8_t *buff_ptr;
	struct bpf_hdr *bpf_hdr;

	assert(circuit->fd > 0);

	if (ioctl(circuit->fd, FIONREAD, (caddr_t)&bytestoread) < 0) {
		zlog_warn("ioctl() FIONREAD failed: %s", safe_strerror(errno));
	}

	if (bytestoread) {
		bytesread = read(circuit->fd, readbuff, readblen);
	}
	if (bytesread < 0) {
		zlog_warn("%s: read() failed: %s", __func__,
			  safe_strerror(errno));
		return ISIS_WARNING;
	}

	if (bytesread == 0)
		return ISIS_WARNING;

	buff_ptr = readbuff;
	while (buff_ptr < readbuff + bytesread) {
		bpf_hdr = (struct bpf_hdr *) buff_ptr;
		assert(bpf_hdr->bh_caplen == bpf_hdr->bh_datalen);
		offset = bpf_hdr->bh_hdrlen + LLC_LEN + ETHER_HDR_LEN;

		/* then we lose the BPF, LLC and ethernet headers */
		stream_write(circuit->rcv_stream, buff_ptr + offset,
			     bpf_hdr->bh_caplen - LLC_LEN - ETHER_HDR_LEN);
		stream_set_getp(circuit->rcv_stream, 0);

		memcpy(ssnpa, buff_ptr + bpf_hdr->bh_hdrlen + ETHER_ADDR_LEN,
		ETHER_ADDR_LEN);

		isis_handle_pdu(circuit, ssnpa);
		stream_reset(circuit->rcv_stream);
		buff_ptr += BPF_WORDALIGN(bpf_hdr->bh_hdrlen +
						bpf_hdr->bh_datalen);
	}


	if (ioctl(circuit->fd, BIOCFLUSH, &one) < 0)
		zlog_warn("Flushing failed: %s", safe_strerror(errno));

	return ISIS_OK;
}

int isis_send_pdu_bcast(struct isis_circuit *circuit, int level)
{
	struct ether_header *eth;
	ssize_t written;
	size_t buflen;

	buflen = stream_get_endp(circuit->snd_stream) + LLC_LEN + ETHER_HDR_LEN;
	if (buflen > sizeof(sock_buff)) {
		zlog_warn(
			"%s: sock_buff size %zu is less than output pdu size %zu on circuit %s",
			__func__, sizeof(sock_buff), buflen,
			circuit->interface->name);
		return ISIS_WARNING;
	}

	stream_set_getp(circuit->snd_stream, 0);

	/*
	 * First the eth header
	 */
	eth = (struct ether_header *)sock_buff;
	if (level == 1)
		memcpy(eth->ether_dhost, ALL_L1_ISS, ETH_ALEN);
	else
		memcpy(eth->ether_dhost, ALL_L2_ISS, ETH_ALEN);
	memcpy(eth->ether_shost, circuit->u.bc.snpa, ETH_ALEN);
	size_t frame_size = stream_get_endp(circuit->snd_stream) + LLC_LEN;
	eth->ether_type = htons(isis_ethertype(frame_size));

	/*
	 * Then the LLC
	 */
	sock_buff[ETHER_HDR_LEN] = ISO_SAP;
	sock_buff[ETHER_HDR_LEN + 1] = ISO_SAP;
	sock_buff[ETHER_HDR_LEN + 2] = 0x03;

	/* then we copy the data */
	memcpy(sock_buff + (LLC_LEN + ETHER_HDR_LEN), circuit->snd_stream->data,
	       stream_get_endp(circuit->snd_stream));

	/* now we can send this */
	written = write(circuit->fd, sock_buff, buflen);
	if (written < 0) {
		zlog_warn("IS-IS bpf: could not transmit packet on %s: %s",
			  circuit->interface->name, safe_strerror(errno));
		if (ERRNO_IO_RETRY(errno))
			return ISIS_WARNING;
		return ISIS_ERROR;
	}

	return ISIS_OK;
}

#endif /* ISIS_METHOD == ISIS_METHOD_BPF */
Commit	Line	Data
acddc0ed	1	// SPDX-License-Identifier: GPL-2.0-or-later
8bc98059 PJ	2	/*
	3	* IS-IS Rout(e)ing protocol - isis_bpf.c
	4	*
	5	* Copyright (C) 2001,2002 Sampo Saaristo
d62a17ae	6	* Tampere University of Technology
8bc98059	7	* Institute of Communications Engineering
8bc98059 PJ	8	*/
	9
	10	#include <zebra.h>
745bf05f	11	#if ISIS_METHOD == ISIS_METHOD_BPF
8bc98059 PJ	12	#include <net/if.h>
	13	#include <netinet/if_ether.h>
	14	#include <sys/time.h>
	15	#include <sys/ioctl.h>
	16	#include <net/bpf.h>
	17
	18	#include "log.h"
cfd1f27b	19	#include "network.h"
8bc98059 PJ	20	#include "stream.h"
8bc98059 PJ	21	#include "if.h"
38937bd5	22	#include "lib_errors.h"
8bc98059	23
8bc98059 PJ	24	#include "isisd/isis_constants.h"
	25	#include "isisd/isis_common.h"
	26	#include "isisd/isis_circuit.h"
	27	#include "isisd/isis_flags.h"
	28	#include "isisd/isisd.h"
	29	#include "isisd/isis_constants.h"
	30	#include "isisd/isis_circuit.h"
	31	#include "isisd/isis_network.h"
344b4a29	32	#include "isisd/isis_pdu.h"
8bc98059 PJ	33
	34	#include "privs.h"
	35
8bc98059	36	struct bpf_insn llcfilter[] = {
12386e86 RZ	37	BPF_STMT(BPF_LD + BPF_B + BPF_ABS,
12386e86 RZ	38	ETHER_HDR_LEN), /* check first byte */
d62a17ae	39	BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, ISO_SAP, 0, 5),
12386e86 RZ	40	BPF_STMT(BPF_LD + BPF_B + BPF_ABS, ETHER_HDR_LEN + 1),
	41	BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, ISO_SAP, 0,
	42	3), /* check second byte */
	43	BPF_STMT(BPF_LD + BPF_B + BPF_ABS, ETHER_HDR_LEN + 2),
	44	BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, 0x03, 0, 1), /* check third byte */
d7c0a89a	45	BPF_STMT(BPF_RET + BPF_K, (unsigned int)-1),
d62a17ae	46	BPF_STMT(BPF_RET + BPF_K, 0)};
d7c0a89a QY	47	unsigned int readblen = 0;
d7c0a89a QY	48	uint8_t *readbuff = NULL;
8bc98059 PJ	49
	50	/*
	51	* Table 9 - Architectural constants for use with ISO 8802 subnetworks
	52	* ISO 10589 - 8.4.8
	53	*/
	54
2b64873d DL	55	static const uint8_t ALL_L1_ISS[6] = {0x01, 0x80, 0xC2, 0x00, 0x00, 0x14};
2b64873d DL	56	static const uint8_t ALL_L2_ISS[6] = {0x01, 0x80, 0xC2, 0x00, 0x00, 0x15};
207a1429	57	static char sock_buff[16384];
8bc98059	58
d62a17ae	59	static int open_bpf_dev(struct isis_circuit *circuit)
8bc98059	60	{
d62a17ae	61	int i = 0, fd;
	62	char bpfdev[128];
	63	struct ifreq ifr;
d7c0a89a	64	unsigned int blen, immediate;
f94d4e70	65	#ifdef BIOCSSEESENT
d7c0a89a	66	unsigned int seesent;
f94d4e70	67	#endif
d62a17ae	68	struct timeval timeout;
	69	struct bpf_program bpf_prog;
	70
	71	do {
	72	(void)snprintf(bpfdev, sizeof(bpfdev), "/dev/bpf%d", i++);
	73	fd = open(bpfdev, O_RDWR);
	74	} while (fd < 0 && errno == EBUSY);
	75
	76	if (fd < 0) {
	77	zlog_warn("open_bpf_dev(): failed to create bpf socket: %s",
	78	safe_strerror(errno));
	79	return ISIS_WARNING;
	80	}
	81
	82	zlog_debug("Opened BPF device %s", bpfdev);
	83
	84	memcpy(ifr.ifr_name, circuit->interface->name, sizeof(ifr.ifr_name));
	85	if (ioctl(fd, BIOCSETIF, (caddr_t)&ifr) < 0) {
	86	zlog_warn("open_bpf_dev(): failed to bind to interface: %s",
	87	safe_strerror(errno));
	88	return ISIS_WARNING;
	89	}
	90
	91	if (ioctl(fd, BIOCGBLEN, (caddr_t)&blen) < 0) {
	92	zlog_warn("failed to get BPF buffer len");
	93	blen = circuit->interface->mtu;
	94	}
	95
	96	readblen = blen;
	97
	98	if (readbuff == NULL)
	99	readbuff = malloc(blen);
	100
	101	zlog_debug("BPF buffer len = %u", blen);
	102
	103	/* BPF(4): reads return immediately upon packet reception.
	104	* Otherwise, a read will block until either the kernel
	105	* buffer becomes full or a timeout occurs.
	106	*/
	107	immediate = 1;
	108	if (ioctl(fd, BIOCIMMEDIATE, (caddr_t)&immediate) < 0) {
	109	zlog_warn("failed to set BPF dev to immediate mode");
	110	}
8bc98059 PJ	111
8bc98059 PJ	112	#ifdef BIOCSSEESENT
d62a17ae	113	/*
	114	* We want to see only incoming packets
	115	*/
	116	seesent = 0;
	117	if (ioctl(fd, BIOCSSEESENT, (caddr_t)&seesent) < 0) {
	118	zlog_warn("failed to set BPF dev to incoming only mode");
	119	}
8bc98059 PJ	120	#endif
8bc98059 PJ	121
d62a17ae	122	/*
	123	* ...but all of them
	124	*/
	125	if (ioctl(fd, BIOCPROMISC) < 0) {
	126	zlog_warn("failed to set BPF dev to promiscuous mode");
	127	}
	128
	129	/*
	130	* If the buffer length is smaller than our mtu, lets try to increase it
	131	*/
	132	if (blen < circuit->interface->mtu) {
	133	if (ioctl(fd, BIOCSBLEN, &circuit->interface->mtu) < 0) {
	134	zlog_warn("failed to set BPF buffer len (%u to %u)",
	135	blen, circuit->interface->mtu);
	136	}
	137	}
	138
	139	/*
	140	* Set a timeout parameter - hope this helps select()
	141	*/
	142	timeout.tv_sec = 600;
	143	timeout.tv_usec = 0;
	144	if (ioctl(fd, BIOCSRTIMEOUT, (caddr_t)&timeout) < 0) {
	145	zlog_warn("failed to set BPF device timeout");
	146	}
	147
	148	/*
	149	* And set the filter
	150	*/
6006b807	151	memset(&bpf_prog, 0, sizeof(bpf_prog));
d62a17ae	152	bpf_prog.bf_len = 8;
	153	bpf_prog.bf_insns = &(llcfilter[0]);
	154	if (ioctl(fd, BIOCSETF, (caddr_t)&bpf_prog) < 0) {
1f46f33f	155	zlog_warn("%s: failed to install filter: %s", __func__,
d62a17ae	156	safe_strerror(errno));
d62a17ae	157	return ISIS_WARNING;
8bc98059	158	}
d62a17ae	159
	160	assert(fd > 0);
	161
	162	circuit->fd = fd;
	163
	164	return ISIS_OK;
8bc98059 PJ	165	}
	166
	167	/*
	168	* Create the socket and set the tx/rx funcs
	169	*/
d62a17ae	170	int isis_sock_init(struct isis_circuit *circuit)
8bc98059	171	{
d62a17ae	172	int retval = ISIS_OK;
d62a17ae	173
0cf6db21	174	frr_with_privs(&isisd_privs) {
d62a17ae	175
01b9e3fd	176	retval = open_bpf_dev(circuit);
d62a17ae	177
01b9e3fd	178	if (retval != ISIS_OK) {
633fc9b1 DL	179	zlog_warn("%s: could not initialize the socket",
633fc9b1 DL	180	__func__);
01b9e3fd DL	181	break;
01b9e3fd DL	182	}
d62a17ae	183
01b9e3fd DL	184	if (if_is_broadcast(circuit->interface)) {
	185	circuit->tx = isis_send_pdu_bcast;
	186	circuit->rx = isis_recv_pdu_bcast;
	187	} else {
1f46f33f	188	zlog_warn("%s: unknown circuit type", __func__);
01b9e3fd DL	189	retval = ISIS_WARNING;
	190	break;
	191	}
633fc9b1	192	}
8bc98059	193
d62a17ae	194	return retval;
8bc98059 PJ	195	}
8bc98059 PJ	196
d7c0a89a	197	int isis_recv_pdu_bcast(struct isis_circuit circuit, uint8_t ssnpa)
8bc98059	198	{
55b2b5ab	199	int bytesread = 0, bytestoread = 0, offset, one = 1;
d7c0a89a	200	uint8_t *buff_ptr;
d62a17ae	201	struct bpf_hdr *bpf_hdr;
8bc98059	202
d62a17ae	203	assert(circuit->fd > 0);
8bc98059	204
d62a17ae	205	if (ioctl(circuit->fd, FIONREAD, (caddr_t)&bytestoread) < 0) {
	206	zlog_warn("ioctl() FIONREAD failed: %s", safe_strerror(errno));
	207	}
8bc98059	208
d62a17ae	209	if (bytestoread) {
	210	bytesread = read(circuit->fd, readbuff, readblen);
	211	}
	212	if (bytesread < 0) {
1f46f33f	213	zlog_warn("%s: read() failed: %s", __func__,
1f46f33f	214	safe_strerror(errno));
d62a17ae	215	return ISIS_WARNING;
d62a17ae	216	}
8bc98059	217
d62a17ae	218	if (bytesread == 0)
d62a17ae	219	return ISIS_WARNING;
8bc98059	220
b9347997	221	buff_ptr = readbuff;
	222	while (buff_ptr < readbuff + bytesread) {
	223	bpf_hdr = (struct bpf_hdr *) buff_ptr;
	224	assert(bpf_hdr->bh_caplen == bpf_hdr->bh_datalen);
	225	offset = bpf_hdr->bh_hdrlen + LLC_LEN + ETHER_HDR_LEN;
8bc98059	226
b9347997	227	/* then we lose the BPF, LLC and ethernet headers */
	228	stream_write(circuit->rcv_stream, buff_ptr + offset,
	229	bpf_hdr->bh_caplen - LLC_LEN - ETHER_HDR_LEN);
	230	stream_set_getp(circuit->rcv_stream, 0);
8bc98059	231
b9347997	232	memcpy(ssnpa, buff_ptr + bpf_hdr->bh_hdrlen + ETHER_ADDR_LEN,
b9347997	233	ETHER_ADDR_LEN);
8bc98059	234
3009394b	235	isis_handle_pdu(circuit, ssnpa);
b9347997	236	stream_reset(circuit->rcv_stream);
	237	buff_ptr += BPF_WORDALIGN(bpf_hdr->bh_hdrlen +
	238	bpf_hdr->bh_datalen);
	239	}
8bc98059	240
8bc98059	241
d62a17ae	242	if (ioctl(circuit->fd, BIOCFLUSH, &one) < 0)
d62a17ae	243	zlog_warn("Flushing failed: %s", safe_strerror(errno));
8bc98059	244
d62a17ae	245	return ISIS_OK;
8bc98059 PJ	246	}
8bc98059 PJ	247
d62a17ae	248	int isis_send_pdu_bcast(struct isis_circuit *circuit, int level)
8bc98059	249	{
d62a17ae	250	struct ether_header *eth;
	251	ssize_t written;
	252	size_t buflen;
	253
12386e86	254	buflen = stream_get_endp(circuit->snd_stream) + LLC_LEN + ETHER_HDR_LEN;
d62a17ae	255	if (buflen > sizeof(sock_buff)) {
d62a17ae	256	zlog_warn(
1f46f33f	257	"%s: sock_buff size %zu is less than output pdu size %zu on circuit %s",
	258	__func__, sizeof(sock_buff), buflen,
	259	circuit->interface->name);
d62a17ae	260	return ISIS_WARNING;
	261	}
	262
	263	stream_set_getp(circuit->snd_stream, 0);
	264
	265	/*
	266	* First the eth header
	267	*/
	268	eth = (struct ether_header *)sock_buff;
	269	if (level == 1)
d1be6968	270	memcpy(eth->ether_dhost, ALL_L1_ISS, ETH_ALEN);
d62a17ae	271	else
d1be6968 DS	272	memcpy(eth->ether_dhost, ALL_L2_ISS, ETH_ALEN);
d1be6968 DS	273	memcpy(eth->ether_shost, circuit->u.bc.snpa, ETH_ALEN);
d62a17ae	274	size_t frame_size = stream_get_endp(circuit->snd_stream) + LLC_LEN;
	275	eth->ether_type = htons(isis_ethertype(frame_size));
	276
	277	/*
	278	* Then the LLC
	279	*/
12386e86 RZ	280	sock_buff[ETHER_HDR_LEN] = ISO_SAP;
	281	sock_buff[ETHER_HDR_LEN + 1] = ISO_SAP;
	282	sock_buff[ETHER_HDR_LEN + 2] = 0x03;
d62a17ae	283
d62a17ae	284	/* then we copy the data */
12386e86	285	memcpy(sock_buff + (LLC_LEN + ETHER_HDR_LEN), circuit->snd_stream->data,
d62a17ae	286	stream_get_endp(circuit->snd_stream));
	287
	288	/* now we can send this */
	289	written = write(circuit->fd, sock_buff, buflen);
	290	if (written < 0) {
	291	zlog_warn("IS-IS bpf: could not transmit packet on %s: %s",
	292	circuit->interface->name, safe_strerror(errno));
	293	if (ERRNO_IO_RETRY(errno))
	294	return ISIS_WARNING;
	295	return ISIS_ERROR;
	296	}
	297
	298	return ISIS_OK;
8bc98059 PJ	299	}
8bc98059 PJ	300
745bf05f	301	#endif /* ISIS_METHOD == ISIS_METHOD_BPF */