[mirror_frr.git] / zebra / rt_socket.c

/*
 * Kernel routing table updates by routing socket.
 * 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>

#ifndef HAVE_NETLINK

#ifdef __OpenBSD__
#include <netmpls/mpls.h>
#endif

#include "if.h"
#include "prefix.h"
#include "sockunion.h"
#include "log.h"
#include "privs.h"
#include "vxlan.h"
#include "lib_errors.h"

#include "zebra/debug.h"
#include "zebra/rib.h"
#include "zebra/rt.h"
#include "zebra/kernel_socket.h"
#include "zebra/zebra_mpls.h"
#include "zebra/zebra_errors.h"

extern struct zebra_privs_t zserv_privs;

#ifdef __OpenBSD__
static int kernel_rtm_add_labels(struct mpls_label_stack *nh_label,
				 struct sockaddr_mpls *smpls)
{
	if (nh_label->num_labels > 1) {
		flog_warn(EC_ZEBRA_MAX_LABELS_PUSH,
			  "%s: can't push %u labels at once (maximum is 1)",
			  __func__, nh_label->num_labels);
		return -1;
	}

	memset(smpls, 0, sizeof(*smpls));
	smpls->smpls_len = sizeof(*smpls);
	smpls->smpls_family = AF_MPLS;
	smpls->smpls_label = htonl(nh_label->label[0] << MPLS_LABEL_OFFSET);

	return 0;
}
#endif

/* Interface between zebra message and rtm message. */
static int kernel_rtm(int cmd, const struct prefix *p,
		      const struct nexthop_group *ng, uint32_t metric)

{
	union sockunion sin_dest, sin_mask, sin_gate;
#ifdef __OpenBSD__
	struct sockaddr_mpls smpls;
#endif
	union sockunion *smplsp = NULL;
	struct nexthop *nexthop;
	int nexthop_num = 0;
	ifindex_t ifindex = 0;
	bool gate = false;
	int error;
	char gate_buf[INET6_BUFSIZ];
	char prefix_buf[PREFIX_STRLEN];
	enum blackhole_type bh_type = BLACKHOLE_UNSPEC;

	prefix2str(p, prefix_buf, sizeof(prefix_buf));

	/*
	 * We only have the ability to ADD or DELETE at this point
	 * in time.
	 */
	if (cmd != RTM_ADD && cmd != RTM_DELETE) {
		if (IS_ZEBRA_DEBUG_KERNEL)
			zlog_debug("%s: %s odd command %s",
				   __func__, prefix_buf,
				   lookup_msg(rtm_type_str, cmd, NULL));
		return 0;
	}

	memset(&sin_dest, 0, sizeof(sin_dest));
	memset(&sin_gate, 0, sizeof(sin_gate));
	memset(&sin_mask, 0, sizeof(sin_mask));

	switch (p->family) {
	case AF_INET:
		sin_dest.sin.sin_family = AF_INET;
		sin_dest.sin.sin_addr = p->u.prefix4;
		sin_gate.sin.sin_family = AF_INET;
#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
		sin_dest.sin.sin_len = sizeof(struct sockaddr_in);
		sin_gate.sin.sin_len = sizeof(struct sockaddr_in);
#endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
		break;
	case AF_INET6:
		sin_dest.sin6.sin6_family = AF_INET6;
		sin_dest.sin6.sin6_addr = p->u.prefix6;
		sin_gate.sin6.sin6_family = AF_INET6;
#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
		sin_dest.sin6.sin6_len = sizeof(struct sockaddr_in6);
		sin_gate.sin6.sin6_len = sizeof(struct sockaddr_in6);
#endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
		break;
	}

	/* Make gateway. */
	for (ALL_NEXTHOPS_PTR(ng, nexthop)) {
		/*
		 * We only want to use the actual good nexthops
		 */
		if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE) ||
		    !CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE))
			continue;

		smplsp = NULL;
		gate = false;
		snprintf(gate_buf, sizeof(gate_buf), "NULL");

		switch (nexthop->type) {
		case NEXTHOP_TYPE_IPV4:
		case NEXTHOP_TYPE_IPV4_IFINDEX:
			sin_gate.sin.sin_addr = nexthop->gate.ipv4;
			sin_gate.sin.sin_family = AF_INET;
#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
			sin_gate.sin.sin_len = sizeof(struct sockaddr_in);
#endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
			ifindex = nexthop->ifindex;
			gate = true;
			break;
		case NEXTHOP_TYPE_IPV6:
		case NEXTHOP_TYPE_IPV6_IFINDEX:
			sin_gate.sin6.sin6_addr = nexthop->gate.ipv6;
			sin_gate.sin6.sin6_family = AF_INET6;
#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
			sin_gate.sin6.sin6_len = sizeof(struct sockaddr_in6);
#endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
			ifindex = nexthop->ifindex;
/* Under kame set interface index to link local address */
#ifdef KAME

#define SET_IN6_LINKLOCAL_IFINDEX(a, i)                                        \
	do {                                                                   \
		(a).s6_addr[2] = ((i) >> 8) & 0xff;                            \
		(a).s6_addr[3] = (i)&0xff;                                     \
	} while (0)

			if (IN6_IS_ADDR_LINKLOCAL(&sin_gate.sin6.sin6_addr))
				SET_IN6_LINKLOCAL_IFINDEX(
					sin_gate.sin6.sin6_addr,
					ifindex);
#endif /* KAME */

			gate = true;
			break;
		case NEXTHOP_TYPE_IFINDEX:
			ifindex = nexthop->ifindex;
			break;
		case NEXTHOP_TYPE_BLACKHOLE:
			bh_type = nexthop->bh_type;
			switch (p->family) {
			case AF_INET: {
				struct in_addr loopback;

				loopback.s_addr = htonl(INADDR_LOOPBACK);
				sin_gate.sin.sin_addr = loopback;
#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
				sin_gate.sin.sin_len =
					sizeof(struct sockaddr_in);
#endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
				gate = true;
			} break;
			case AF_INET6: {
				struct in6_addr loopback;

				inet_pton(AF_INET6, "::1", &loopback);

				sin_gate.sin6.sin6_addr = loopback;
				sin_gate.sin6.sin6_family = AF_INET6;

#ifdef HAVE_STRUCTSOCKADDR_SA_LEN
				sin_gate.sin6.sin6_len =
					sizeof(struct sockaddr_in6);
#endif /* HAVE_STRUCTSOCKADDR_SA_LEN */
				gate = true;
			} break;
			}
		}

		switch (p->family) {
		case AF_INET:
			masklen2ip(p->prefixlen, &sin_mask.sin.sin_addr);
			sin_mask.sin.sin_family = AF_INET;
#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
			sin_mask.sin.sin_len = sizeof(struct sockaddr_in);
#endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
			break;
		case AF_INET6:
			masklen2ip6(p->prefixlen, &sin_mask.sin6.sin6_addr);
			sin_mask.sin6.sin6_family = AF_INET6;
#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
			sin_mask.sin6.sin6_len = sizeof(struct sockaddr_in6);
#endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
			break;
		}

#ifdef __OpenBSD__
		if (nexthop->nh_label) {
			if (kernel_rtm_add_labels(nexthop->nh_label,
						  &smpls) != 0)
				continue;
			smplsp = (union sockunion *)&smpls;
		}
#endif
		error = rtm_write(cmd, &sin_dest, &sin_mask,
				  gate ? &sin_gate : NULL, smplsp,
				  ifindex, bh_type, metric);

		if (IS_ZEBRA_DEBUG_KERNEL) {
			if (!gate) {
				zlog_debug(
					"%s: %s: attention! gate not found for re",
					__func__, prefix_buf);
			} else {
				switch (p->family) {
				case AF_INET:
					inet_ntop(AF_INET,
						  &sin_gate.sin.sin_addr,
						  gate_buf, sizeof(gate_buf));
					break;

				case AF_INET6:
					inet_ntop(AF_INET6,
						  &sin_gate.sin6.sin6_addr,
						  gate_buf, sizeof(gate_buf));
					break;

				default:
					snprintf(gate_buf, sizeof(gate_buf),
						 "(invalid-af)");
					break;
				}
			}
		}
		switch (error) {
			/* We only flag nexthops as being in FIB if
			 * rtm_write() did its work. */
		case ZEBRA_ERR_NOERROR:
			nexthop_num++;
			if (IS_ZEBRA_DEBUG_KERNEL)
				zlog_debug("%s: %s: successfully did NH %s",
					   __func__, prefix_buf, gate_buf);
			if (cmd == RTM_ADD)
				SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB);
			break;

			/* The only valid case for this error is
			 * kernel's failure to install a multipath
			 * route, which is common for FreeBSD. This
			 * should be ignored silently, but logged as an error
			 * otherwise.
			 */
		case ZEBRA_ERR_RTEXIST:
			if (cmd != RTM_ADD)
				flog_err(EC_LIB_SYSTEM_CALL,
					 "%s: rtm_write() returned %d for command %d",
					 __func__, error, cmd);
			continue;

			/* Note any unexpected status returns */
		default:
			flog_err(
				EC_LIB_SYSTEM_CALL,
				"%s: %s: rtm_write() unexpectedly returned %d for command %s",
				__func__, prefix_buf, error,
				lookup_msg(rtm_type_str, cmd, NULL));
			break;
		}
	} /* for (ALL_NEXTHOPS(...))*/

	/* If there was no useful nexthop, then complain. */
	if (nexthop_num == 0) {
		if (IS_ZEBRA_DEBUG_KERNEL)
			zlog_debug(
				"%s: No useful nexthops were found in RIB prefix %s",
				__func__, prefix_buf);
		return 1;
	}

	return 0; /*XXX*/
}

/*
 * Update or delete a prefix from the kernel,
 * using info from a dataplane context struct.
 */
enum zebra_dplane_result kernel_route_update(struct zebra_dplane_ctx *ctx)
{
	enum zebra_dplane_result res = ZEBRA_DPLANE_REQUEST_SUCCESS;
	uint32_t type, old_type;

	if (dplane_ctx_get_src(ctx) != NULL) {
		zlog_err("route add: IPv6 sourcedest routes unsupported!");
		return ZEBRA_DPLANE_REQUEST_FAILURE;
	}

	type = dplane_ctx_get_type(ctx);
	old_type = dplane_ctx_get_old_type(ctx);

	frr_with_privs(&zserv_privs) {

		if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_DELETE) {
			if (!RSYSTEM_ROUTE(type))
				kernel_rtm(RTM_DELETE, dplane_ctx_get_dest(ctx),
					   dplane_ctx_get_ng(ctx),
					   dplane_ctx_get_metric(ctx));
		} else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_INSTALL) {
			if (!RSYSTEM_ROUTE(type))
				kernel_rtm(RTM_ADD, dplane_ctx_get_dest(ctx),
					   dplane_ctx_get_ng(ctx),
					   dplane_ctx_get_metric(ctx));
		} else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_UPDATE) {
			/* Must do delete and add separately -
			 * no update available
			 */
			if (!RSYSTEM_ROUTE(old_type))
				kernel_rtm(RTM_DELETE, dplane_ctx_get_dest(ctx),
					   dplane_ctx_get_old_ng(ctx),
					   dplane_ctx_get_old_metric(ctx));

			if (!RSYSTEM_ROUTE(type))
				kernel_rtm(RTM_ADD, dplane_ctx_get_dest(ctx),
					   dplane_ctx_get_ng(ctx),
					   dplane_ctx_get_metric(ctx));
		} else {
			zlog_err("Invalid routing socket update op %s (%u)",
				 dplane_op2str(dplane_ctx_get_op(ctx)),
				 dplane_ctx_get_op(ctx));
			res = ZEBRA_DPLANE_REQUEST_FAILURE;
		}
	} /* Elevated privs */

	if (RSYSTEM_ROUTE(type)
	    && dplane_ctx_get_op(ctx) != DPLANE_OP_ROUTE_DELETE) {
		struct nexthop *nexthop;

		for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) {
			if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE))
				continue;

			if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) {
				SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB);
			}
		}
	}

	return res;
}

enum zebra_dplane_result kernel_nexthop_update(struct zebra_dplane_ctx *ctx)
{
	return ZEBRA_DPLANE_REQUEST_SUCCESS;
}

int kernel_neigh_update(int add, int ifindex, uint32_t addr, char *lla,
			int llalen, ns_id_t ns_id)
{
	/* TODO */
	return 0;
}

/* NYI on routing-socket platforms, but we've always returned 'success'... */
enum zebra_dplane_result kernel_neigh_update_ctx(struct zebra_dplane_ctx *ctx)
{
	return ZEBRA_DPLANE_REQUEST_SUCCESS;
}

extern int kernel_get_ipmr_sg_stats(struct zebra_vrf *zvrf, void *mroute)
{
	return 0;
}

/*
 * Update MAC, using dataplane context object. No-op here for now.
 */
enum zebra_dplane_result kernel_mac_update_ctx(struct zebra_dplane_ctx *ctx)
{
	return ZEBRA_DPLANE_REQUEST_SUCCESS;
}

extern int kernel_interface_set_master(struct interface *master,
				       struct interface *slave)
{
	return 0;
}

uint32_t kernel_get_speed(struct interface *ifp, int *error)
{
	return ifp->speed;
}

#endif /* !HAVE_NETLINK */
Commit	Line	Data
718e3744	1	/*
	2	* Kernel routing table updates by routing socket.
	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>
ddfeb486 DL	23
	24	#ifndef HAVE_NETLINK
	25
fe6c7157	26	#ifdef __OpenBSD__
d3e2c74a RW	27	#include <netmpls/mpls.h>
d3e2c74a RW	28	#endif
718e3744	29
	30	#include "if.h"
	31	#include "prefix.h"
	32	#include "sockunion.h"
	33	#include "log.h"
edd7c245	34	#include "privs.h"
13d60d35	35	#include "vxlan.h"
174482ef	36	#include "lib_errors.h"
718e3744	37
	38	#include "zebra/debug.h"
	39	#include "zebra/rib.h"
6621ca86	40	#include "zebra/rt.h"
dc95824a	41	#include "zebra/kernel_socket.h"
d3e2c74a	42	#include "zebra/zebra_mpls.h"
364fed6b	43	#include "zebra/zebra_errors.h"
718e3744	44
edd7c245	45	extern struct zebra_privs_t zserv_privs;
edd7c245	46
5e8c8947	47	#ifdef __OpenBSD__
8ecdb26e	48	static int kernel_rtm_add_labels(struct mpls_label_stack *nh_label,
5e8c8947 RW	49	struct sockaddr_mpls *smpls)
	50	{
	51	if (nh_label->num_labels > 1) {
e914ccbe	52	flog_warn(EC_ZEBRA_MAX_LABELS_PUSH,
3efd0893	53	"%s: can't push %u labels at once (maximum is 1)",
9df414fe	54	__func__, nh_label->num_labels);
5e8c8947 RW	55	return -1;
	56	}
	57
	58	memset(smpls, 0, sizeof(*smpls));
	59	smpls->smpls_len = sizeof(*smpls);
	60	smpls->smpls_family = AF_MPLS;
	61	smpls->smpls_label = htonl(nh_label->label[0] << MPLS_LABEL_OFFSET);
	62
	63	return 0;
	64	}
	65	#endif
	66
718e3744	67	/* Interface between zebra message and rtm message. */
08ea27d1 DS	68	static int kernel_rtm(int cmd, const struct prefix *p,
08ea27d1 DS	69	const struct nexthop_group *ng, uint32_t metric)
718e3744	70
718e3744	71	{
ca2c70bd	72	union sockunion sin_dest, sin_mask, sin_gate;
fe6c7157	73	#ifdef __OpenBSD__
d62a17ae	74	struct sockaddr_mpls smpls;
d3e2c74a	75	#endif
d62a17ae	76	union sockunion *smplsp = NULL;
	77	struct nexthop *nexthop;
	78	int nexthop_num = 0;
	79	ifindex_t ifindex = 0;
4dd39a0e	80	bool gate = false;
d62a17ae	81	int error;
981dc13f	82	char gate_buf[INET6_BUFSIZ];
d62a17ae	83	char prefix_buf[PREFIX_STRLEN];
a8309422	84	enum blackhole_type bh_type = BLACKHOLE_UNSPEC;
d62a17ae	85
683c06ad	86	prefix2str(p, prefix_buf, sizeof(prefix_buf));
718e3744	87
86afd529 DS	88	/*
	89	* We only have the ability to ADD or DELETE at this point
	90	* in time.
	91	*/
	92	if (cmd != RTM_ADD && cmd != RTM_DELETE) {
	93	if (IS_ZEBRA_DEBUG_KERNEL)
5ea8213f	94	zlog_debug("%s: %s odd command %s",
86afd529	95	__func__, prefix_buf,
5ea8213f	96	lookup_msg(rtm_type_str, cmd, NULL));
86afd529 DS	97	return 0;
	98	}
	99
08ea27d1 DS	100	memset(&sin_dest, 0, sizeof(sin_dest));
08ea27d1 DS	101	memset(&sin_gate, 0, sizeof(sin_gate));
ca2c70bd	102	memset(&sin_mask, 0, sizeof(sin_mask));
718e3744	103
08ea27d1 DS	104	switch (p->family) {
	105	case AF_INET:
	106	sin_dest.sin.sin_family = AF_INET;
08ea27d1 DS	107	sin_dest.sin.sin_addr = p->u.prefix4;
08ea27d1 DS	108	sin_gate.sin.sin_family = AF_INET;
0413dd75 RZ	109	#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
	110	sin_dest.sin.sin_len = sizeof(struct sockaddr_in);
	111	sin_gate.sin.sin_len = sizeof(struct sockaddr_in);
	112	#endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
08ea27d1 DS	113	break;
	114	case AF_INET6:
	115	sin_dest.sin6.sin6_family = AF_INET6;
08ea27d1 DS	116	sin_dest.sin6.sin6_addr = p->u.prefix6;
08ea27d1 DS	117	sin_gate.sin6.sin6_family = AF_INET6;
0413dd75 RZ	118	#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
	119	sin_dest.sin6.sin6_len = sizeof(struct sockaddr_in6);
	120	sin_gate.sin6.sin6_len = sizeof(struct sockaddr_in6);
	121	#endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
08ea27d1 DS	122	break;
08ea27d1 DS	123	}
718e3744	124
d62a17ae	125	/* Make gateway. */
01ce7cba	126	for (ALL_NEXTHOPS_PTR(ng, nexthop)) {
86afd529 DS	127	/*
	128	* We only want to use the actual good nexthops
	129	*/
	130	if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE) \|\|
	131	!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE))
d62a17ae	132	continue;
d62a17ae	133
c2519893	134	smplsp = NULL;
4dd39a0e	135	gate = false;
981dc13f	136	snprintf(gate_buf, sizeof(gate_buf), "NULL");
d62a17ae	137
86afd529 DS	138	switch (nexthop->type) {
	139	case NEXTHOP_TYPE_IPV4:
	140	case NEXTHOP_TYPE_IPV4_IFINDEX:
	141	sin_gate.sin.sin_addr = nexthop->gate.ipv4;
	142	sin_gate.sin.sin_family = AF_INET;
0413dd75 RZ	143	#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
	144	sin_gate.sin.sin_len = sizeof(struct sockaddr_in);
	145	#endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
86afd529	146	ifindex = nexthop->ifindex;
4dd39a0e	147	gate = true;
86afd529 DS	148	break;
	149	case NEXTHOP_TYPE_IPV6:
	150	case NEXTHOP_TYPE_IPV6_IFINDEX:
	151	sin_gate.sin6.sin6_addr = nexthop->gate.ipv6;
	152	sin_gate.sin6.sin6_family = AF_INET6;
0413dd75 RZ	153	#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
	154	sin_gate.sin6.sin6_len = sizeof(struct sockaddr_in6);
	155	#endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
86afd529	156	ifindex = nexthop->ifindex;
08ea27d1 DS	157	/* Under kame set interface index to link local address */
	158	#ifdef KAME
	159
	160	#define SET_IN6_LINKLOCAL_IFINDEX(a, i) \
c9277ebb DS	161	do { \
	162	(a).s6_addr[2] = ((i) >> 8) & 0xff; \
	163	(a).s6_addr[3] = (i)&0xff; \
	164	} while (0)
08ea27d1	165
86afd529 DS	166	if (IN6_IS_ADDR_LINKLOCAL(&sin_gate.sin6.sin6_addr))
	167	SET_IN6_LINKLOCAL_IFINDEX(
	168	sin_gate.sin6.sin6_addr,
	169	ifindex);
08ea27d1 DS	170	#endif /* KAME */
08ea27d1 DS	171
4dd39a0e	172	gate = true;
86afd529 DS	173	break;
	174	case NEXTHOP_TYPE_IFINDEX:
	175	ifindex = nexthop->ifindex;
	176	break;
	177	case NEXTHOP_TYPE_BLACKHOLE:
	178	bh_type = nexthop->bh_type;
	179	switch (p->family) {
c3d6b386	180	case AF_INET: {
86afd529	181	struct in_addr loopback;
381477e8	182
86afd529 DS	183	loopback.s_addr = htonl(INADDR_LOOPBACK);
86afd529 DS	184	sin_gate.sin.sin_addr = loopback;
0413dd75 RZ	185	#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
	186	sin_gate.sin.sin_len =
	187	sizeof(struct sockaddr_in);
	188	#endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
4dd39a0e	189	gate = true;
381477e8 DS	190	} break;
	191	case AF_INET6: {
	192	struct in6_addr loopback;
	193
	194	inet_pton(AF_INET6, "::1", &loopback);
	195
	196	sin_gate.sin6.sin6_addr = loopback;
	197	sin_gate.sin6.sin6_family = AF_INET6;
	198
	199	#ifdef HAVE_STRUCTSOCKADDR_SA_LEN
	200	sin_gate.sin6.sin6_len =
	201	sizeof(struct sockaddr_in6);
	202	#endif /* HAVE_STRUCTSOCKADDR_SA_LEN */
	203	gate = true;
	204	} break;
d62a17ae	205	}
86afd529 DS	206	}
	207
	208	switch (p->family) {
	209	case AF_INET:
18d10d88 DS	210	masklen2ip(p->prefixlen, &sin_mask.sin.sin_addr);
18d10d88 DS	211	sin_mask.sin.sin_family = AF_INET;
0413dd75 RZ	212	#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
	213	sin_mask.sin.sin_len = sizeof(struct sockaddr_in);
	214	#endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
86afd529 DS	215	break;
86afd529 DS	216	case AF_INET6:
18d10d88 DS	217	masklen2ip6(p->prefixlen, &sin_mask.sin6.sin6_addr);
18d10d88 DS	218	sin_mask.sin6.sin6_family = AF_INET6;
0413dd75 RZ	219	#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
	220	sin_mask.sin6.sin6_len = sizeof(struct sockaddr_in6);
	221	#endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
86afd529 DS	222	break;
86afd529 DS	223	}
718e3744	224
fe6c7157	225	#ifdef __OpenBSD__
b24204be MS	226	if (nexthop->nh_label) {
	227	if (kernel_rtm_add_labels(nexthop->nh_label,
	228	&smpls) != 0)
	229	continue;
	230	smplsp = (union sockunion *)&smpls;
	231	}
d3e2c74a	232	#endif
18d10d88	233	error = rtm_write(cmd, &sin_dest, &sin_mask,
86afd529 DS	234	gate ? &sin_gate : NULL, smplsp,
	235	ifindex, bh_type, metric);
	236
	237	if (IS_ZEBRA_DEBUG_KERNEL) {
	238	if (!gate) {
981dc13f RZ	239	zlog_debug(
	240	"%s: %s: attention! gate not found for re",
	241	__func__, prefix_buf);
	242	} else {
	243	switch (p->family) {
c3d6b386	244	case AF_INET:
981dc13f RZ	245	inet_ntop(AF_INET,
	246	&sin_gate.sin.sin_addr,
	247	gate_buf, sizeof(gate_buf));
	248	break;
	249
c3d6b386	250	case AF_INET6:
981dc13f RZ	251	inet_ntop(AF_INET6,
	252	&sin_gate.sin6.sin6_addr,
	253	gate_buf, sizeof(gate_buf));
	254	break;
	255
	256	default:
	257	snprintf(gate_buf, sizeof(gate_buf),
	258	"(invalid-af)");
	259	break;
	260	}
	261	}
86afd529 DS	262	}
	263	switch (error) {
	264	/* We only flag nexthops as being in FIB if
	265	* rtm_write() did its work. */
	266	case ZEBRA_ERR_NOERROR:
	267	nexthop_num++;
	268	if (IS_ZEBRA_DEBUG_KERNEL)
	269	zlog_debug("%s: %s: successfully did NH %s",
	270	__func__, prefix_buf, gate_buf);
	271	if (cmd == RTM_ADD)
	272	SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB);
	273	break;
	274
	275	/* The only valid case for this error is
	276	* kernel's failure to install a multipath
	277	* route, which is common for FreeBSD. This
	278	* should be ignored silently, but logged as an error
	279	* otherwise.
	280	*/
	281	case ZEBRA_ERR_RTEXIST:
	282	if (cmd != RTM_ADD)
	283	flog_err(EC_LIB_SYSTEM_CALL,
	284	"%s: rtm_write() returned %d for command %d",
	285	__func__, error, cmd);
	286	continue;
d62a17ae	287
86afd529 DS	288	/* Note any unexpected status returns */
86afd529 DS	289	default:
31be7dbb RZ	290	flog_err(
	291	EC_LIB_SYSTEM_CALL,
	292	"%s: %s: rtm_write() unexpectedly returned %d for command %s",
	293	__func__, prefix_buf, error,
	294	lookup_msg(rtm_type_str, cmd, NULL));
86afd529 DS	295	break;
86afd529 DS	296	}
d62a17ae	297	} /* for (ALL_NEXTHOPS(...))*/
	298
	299	/* If there was no useful nexthop, then complain. */
560e3136 DS	300	if (nexthop_num == 0) {
560e3136 DS	301	if (IS_ZEBRA_DEBUG_KERNEL)
31be7dbb RZ	302	zlog_debug(
	303	"%s: No useful nexthops were found in RIB prefix %s",
	304	__func__, prefix_buf);
560e3136 DS	305	return 1;
560e3136 DS	306	}
d62a17ae	307
d62a17ae	308	return 0; /XXX/
718e3744	309	}
718e3744	310
01ce7cba MS	311	/*
	312	* Update or delete a prefix from the kernel,
	313	* using info from a dataplane context struct.
	314	*/
25779064	315	enum zebra_dplane_result kernel_route_update(struct zebra_dplane_ctx *ctx)
01ce7cba MS	316	{
01ce7cba MS	317	enum zebra_dplane_result res = ZEBRA_DPLANE_REQUEST_SUCCESS;
3cdba47a	318	uint32_t type, old_type;
01ce7cba MS	319
	320	if (dplane_ctx_get_src(ctx) != NULL) {
	321	zlog_err("route add: IPv6 sourcedest routes unsupported!");
e677d109	322	return ZEBRA_DPLANE_REQUEST_FAILURE;
01ce7cba MS	323	}
01ce7cba MS	324
3cdba47a DS	325	type = dplane_ctx_get_type(ctx);
	326	old_type = dplane_ctx_get_old_type(ctx);
	327
0cf6db21	328	frr_with_privs(&zserv_privs) {
f183e380	329
3cdba47a DS	330	if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_DELETE) {
	331	if (!RSYSTEM_ROUTE(type))
	332	kernel_rtm(RTM_DELETE, dplane_ctx_get_dest(ctx),
	333	dplane_ctx_get_ng(ctx),
	334	dplane_ctx_get_metric(ctx));
	335	} else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_INSTALL) {
	336	if (!RSYSTEM_ROUTE(type))
	337	kernel_rtm(RTM_ADD, dplane_ctx_get_dest(ctx),
	338	dplane_ctx_get_ng(ctx),
	339	dplane_ctx_get_metric(ctx));
	340	} else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_UPDATE) {
f183e380 MS	341	/* Must do delete and add separately -
	342	* no update available
	343	*/
3cdba47a DS	344	if (!RSYSTEM_ROUTE(old_type))
	345	kernel_rtm(RTM_DELETE, dplane_ctx_get_dest(ctx),
	346	dplane_ctx_get_old_ng(ctx),
	347	dplane_ctx_get_old_metric(ctx));
	348
	349	if (!RSYSTEM_ROUTE(type))
	350	kernel_rtm(RTM_ADD, dplane_ctx_get_dest(ctx),
	351	dplane_ctx_get_ng(ctx),
	352	dplane_ctx_get_metric(ctx));
f183e380 MS	353	} else {
	354	zlog_err("Invalid routing socket update op %s (%u)",
	355	dplane_op2str(dplane_ctx_get_op(ctx)),
	356	dplane_ctx_get_op(ctx));
	357	res = ZEBRA_DPLANE_REQUEST_FAILURE;
	358	}
	359	} /* Elevated privs */
01ce7cba	360
3cdba47a DS	361	if (RSYSTEM_ROUTE(type)
	362	&& dplane_ctx_get_op(ctx) != DPLANE_OP_ROUTE_DELETE) {
	363	struct nexthop *nexthop;
	364
	365	for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) {
	366	if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE))
	367	continue;
	368
	369	if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) {
	370	SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB);
	371	}
	372	}
	373	}
	374
01ce7cba MS	375	return res;
	376	}
	377
07cc1745 SW	378	enum zebra_dplane_result kernel_nexthop_update(struct zebra_dplane_ctx *ctx)
	379	{
	380	return ZEBRA_DPLANE_REQUEST_SUCCESS;
	381	}
	382
d62a17ae	383	int kernel_neigh_update(int add, int ifindex, uint32_t addr, char *lla,
5895d33f	384	int llalen, ns_id_t ns_id)
6b8a5694	385	{
d62a17ae	386	/* TODO */
d62a17ae	387	return 0;
6b8a5694	388	}
1498c059	389
931fa60c MS	390	/* NYI on routing-socket platforms, but we've always returned 'success'... */
	391	enum zebra_dplane_result kernel_neigh_update_ctx(struct zebra_dplane_ctx *ctx)
	392	{
	393	return ZEBRA_DPLANE_REQUEST_SUCCESS;
	394	}
	395
43b5cc5e	396	extern int kernel_get_ipmr_sg_stats(struct zebra_vrf zvrf, void mroute)
1498c059	397	{
d62a17ae	398	return 0;
1498c059	399	}
13d60d35	400
036d93c0 MS	401	/*
	402	* Update MAC, using dataplane context object. No-op here for now.
	403	*/
	404	enum zebra_dplane_result kernel_mac_update_ctx(struct zebra_dplane_ctx *ctx)
2232a77c	405	{
036d93c0	406	return ZEBRA_DPLANE_REQUEST_SUCCESS;
2232a77c	407	}
2232a77c	408
e0ae31b8 DS	409	extern int kernel_interface_set_master(struct interface *master,
	410	struct interface *slave)
	411	{
	412	return 0;
	413	}
0ecfe5bf	414
594c2878	415	uint32_t kernel_get_speed(struct interface ifp, int error)
dc7b3cae DS	416	{
	417	return ifp->speed;
	418	}
	419
ddfeb486	420	#endif /* !HAVE_NETLINK */