1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* Kernel routing table updates using netlink over GNU/Linux system.
3 * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro
10 /* The following definition is to workaround an issue in the Linux kernel
11 * header files with redefinition of 'struct in6_addr' in both
12 * netinet/in.h and linux/in6.h.
13 * Reference - https://sourceware.org/ml/libc-alpha/2013-01/msg00599.html
17 #include <net/if_arp.h>
18 #include <linux/lwtunnel.h>
19 #include <linux/mpls_iptunnel.h>
20 #include <linux/seg6_iptunnel.h>
21 #include <linux/seg6_local.h>
22 #include <linux/neighbour.h>
23 #include <linux/rtnetlink.h>
24 #include <linux/nexthop.h>
26 /* Hack for GNU libc version 2. */
28 #define MSG_TRUNC 0x20
29 #endif /* MSG_TRUNC */
36 #include "plist_int.h"
37 #include "connected.h"
50 #include "zebra/zapi_msg.h"
51 #include "zebra/zebra_ns.h"
52 #include "zebra/zebra_vrf.h"
54 #include "zebra/redistribute.h"
55 #include "zebra/interface.h"
56 #include "zebra/debug.h"
57 #include "zebra/rtadv.h"
58 #include "zebra/zebra_ptm.h"
59 #include "zebra/zebra_mpls.h"
60 #include "zebra/kernel_netlink.h"
61 #include "zebra/rt_netlink.h"
62 #include "zebra/zebra_nhg.h"
63 #include "zebra/zebra_mroute.h"
64 #include "zebra/zebra_vxlan.h"
65 #include "zebra/zebra_errors.h"
66 #include "zebra/zebra_evpn_mh.h"
67 #include "zebra/zebra_trace.h"
68 #include "zebra/zebra_neigh.h"
74 /* Re-defining as I am unable to include <linux/if_bridge.h> which has the
75 * UAPI for MAC sync. */
76 #ifndef _UAPI_LINUX_IF_BRIDGE_H
77 #define BR_SPH_LIST_SIZE 10
80 static vlanid_t filter_vlan
= 0;
82 /* We capture whether the current kernel supports nexthop ids; by
83 * default, we'll use them if possible. There's also a configuration
84 * available to _disable_ use of kernel nexthops.
86 static bool supports_nh
;
94 static const char ipv4_ll_buf
[16] = "169.254.0.1";
95 static struct in_addr ipv4_ll
;
97 /* Is this a ipv4 over ipv6 route? */
98 static bool is_route_v4_over_v6(unsigned char rtm_family
,
99 enum nexthop_types_t nexthop_type
)
101 if (rtm_family
== AF_INET
102 && (nexthop_type
== NEXTHOP_TYPE_IPV6
103 || nexthop_type
== NEXTHOP_TYPE_IPV6_IFINDEX
))
109 /* Helper to control use of kernel-level nexthop ids */
110 static bool kernel_nexthops_supported(void)
112 return (supports_nh
&& !vrf_is_backend_netns()
113 && zebra_nhg_kernel_nexthops_enabled());
117 * Some people may only want to use NHGs created by protos and not
118 * implicitly created by Zebra. This check accounts for that.
120 static bool proto_nexthops_only(void)
122 return zebra_nhg_proto_nexthops_only();
125 /* Is this a proto created NHG? */
126 static bool is_proto_nhg(uint32_t id
, int type
)
128 /* If type is available, use it as the source of truth */
130 if (type
!= ZEBRA_ROUTE_NHG
)
135 if (id
>= ZEBRA_NHG_PROTO_LOWER
)
141 /* Is vni mcast group */
142 static bool is_mac_vni_mcast_group(struct ethaddr
*mac
, vni_t vni
,
143 struct in_addr grp_addr
)
148 if (!is_zero_mac(mac
))
151 if (!IN_MULTICAST(ntohl(grp_addr
.s_addr
)))
158 * The ipv4_ll data structure is used for all 5549
159 * additions to the kernel. Let's figure out the
160 * correct value one time instead for every
161 * install/remove of a 5549 type route
163 void rt_netlink_init(void)
165 inet_pton(AF_INET
, ipv4_ll_buf
, &ipv4_ll
);
169 * Mapping from dataplane neighbor flags to netlink flags
171 static uint8_t neigh_flags_to_netlink(uint8_t dplane_flags
)
175 if (dplane_flags
& DPLANE_NTF_EXT_LEARNED
)
176 flags
|= NTF_EXT_LEARNED
;
177 if (dplane_flags
& DPLANE_NTF_ROUTER
)
179 if (dplane_flags
& DPLANE_NTF_USE
)
186 * Mapping from dataplane neighbor state to netlink state
188 static uint16_t neigh_state_to_netlink(uint16_t dplane_state
)
192 if (dplane_state
& DPLANE_NUD_REACHABLE
)
193 state
|= NUD_REACHABLE
;
194 if (dplane_state
& DPLANE_NUD_STALE
)
196 if (dplane_state
& DPLANE_NUD_NOARP
)
198 if (dplane_state
& DPLANE_NUD_PROBE
)
200 if (dplane_state
& DPLANE_NUD_INCOMPLETE
)
201 state
|= NUD_INCOMPLETE
;
202 if (dplane_state
& DPLANE_NUD_PERMANENT
)
203 state
|= NUD_PERMANENT
;
204 if (dplane_state
& DPLANE_NUD_FAILED
)
211 static inline bool is_selfroute(int proto
)
213 if ((proto
== RTPROT_BGP
) || (proto
== RTPROT_OSPF
)
214 || (proto
== RTPROT_ZSTATIC
) || (proto
== RTPROT_ZEBRA
)
215 || (proto
== RTPROT_ISIS
) || (proto
== RTPROT_RIPNG
)
216 || (proto
== RTPROT_NHRP
) || (proto
== RTPROT_EIGRP
)
217 || (proto
== RTPROT_LDP
) || (proto
== RTPROT_BABEL
)
218 || (proto
== RTPROT_RIP
) || (proto
== RTPROT_SHARP
)
219 || (proto
== RTPROT_PBR
) || (proto
== RTPROT_OPENFABRIC
)
220 || (proto
== RTPROT_SRTE
)) {
227 int zebra2proto(int proto
)
230 case ZEBRA_ROUTE_BABEL
:
231 proto
= RTPROT_BABEL
;
233 case ZEBRA_ROUTE_BGP
:
236 case ZEBRA_ROUTE_OSPF
:
237 case ZEBRA_ROUTE_OSPF6
:
240 case ZEBRA_ROUTE_STATIC
:
241 proto
= RTPROT_ZSTATIC
;
243 case ZEBRA_ROUTE_ISIS
:
246 case ZEBRA_ROUTE_RIP
:
249 case ZEBRA_ROUTE_RIPNG
:
250 proto
= RTPROT_RIPNG
;
252 case ZEBRA_ROUTE_NHRP
:
255 case ZEBRA_ROUTE_EIGRP
:
256 proto
= RTPROT_EIGRP
;
258 case ZEBRA_ROUTE_LDP
:
261 case ZEBRA_ROUTE_SHARP
:
262 proto
= RTPROT_SHARP
;
264 case ZEBRA_ROUTE_PBR
:
267 case ZEBRA_ROUTE_OPENFABRIC
:
268 proto
= RTPROT_OPENFABRIC
;
270 case ZEBRA_ROUTE_SRTE
:
273 case ZEBRA_ROUTE_TABLE
:
274 case ZEBRA_ROUTE_NHG
:
275 proto
= RTPROT_ZEBRA
;
277 case ZEBRA_ROUTE_CONNECT
:
278 case ZEBRA_ROUTE_KERNEL
:
279 proto
= RTPROT_KERNEL
;
283 * When a user adds a new protocol this will show up
284 * to let them know to do something about it. This
285 * is intentionally a warn because we should see
286 * this as part of development of a new protocol
289 "%s: Please add this protocol(%d) to proper rt_netlink.c handling",
291 proto
= RTPROT_ZEBRA
;
298 static inline int proto2zebra(int proto
, int family
, bool is_nexthop
)
302 proto
= ZEBRA_ROUTE_BABEL
;
305 proto
= ZEBRA_ROUTE_BGP
;
308 proto
= (family
== AF_INET
) ? ZEBRA_ROUTE_OSPF
312 proto
= ZEBRA_ROUTE_ISIS
;
315 proto
= ZEBRA_ROUTE_RIP
;
318 proto
= ZEBRA_ROUTE_RIPNG
;
321 proto
= ZEBRA_ROUTE_NHRP
;
324 proto
= ZEBRA_ROUTE_EIGRP
;
327 proto
= ZEBRA_ROUTE_LDP
;
331 proto
= ZEBRA_ROUTE_STATIC
;
334 proto
= ZEBRA_ROUTE_SHARP
;
337 proto
= ZEBRA_ROUTE_PBR
;
339 case RTPROT_OPENFABRIC
:
340 proto
= ZEBRA_ROUTE_OPENFABRIC
;
343 proto
= ZEBRA_ROUTE_SRTE
;
346 case RTPROT_REDIRECT
:
353 case RTPROT_DNROUTED
:
357 case RTPROT_KEEPALIVED
:
359 proto
= ZEBRA_ROUTE_KERNEL
;
363 proto
= ZEBRA_ROUTE_NHG
;
366 /* Intentional fall thru */
369 * When a user adds a new protocol this will show up
370 * to let them know to do something about it. This
371 * is intentionally a warn because we should see
372 * this as part of development of a new protocol
375 "%s: Please add this protocol(%d) to proper rt_netlink.c handling",
377 proto
= ZEBRA_ROUTE_KERNEL
;
384 Pending: create an efficient table_id (in a tree/hash) based lookup)
386 vrf_id_t
vrf_lookup_by_table(uint32_t table_id
, ns_id_t ns_id
)
389 struct zebra_vrf
*zvrf
;
391 RB_FOREACH (vrf
, vrf_id_head
, &vrfs_by_id
) {
395 /* case vrf with netns : match the netnsid */
396 if (vrf_is_backend_netns()) {
397 if (ns_id
== zvrf_id(zvrf
))
398 return zvrf_id(zvrf
);
400 /* VRF is VRF_BACKEND_VRF_LITE */
401 if (zvrf
->table_id
!= table_id
)
403 return zvrf_id(zvrf
);
411 * @parse_encap_mpls() - Parses encapsulated mpls attributes
412 * @tb: Pointer to rtattr to look for nested items in.
413 * @labels: Pointer to store labels in.
415 * Return: Number of mpls labels found.
417 static int parse_encap_mpls(struct rtattr
*tb
, mpls_label_t
*labels
)
419 struct rtattr
*tb_encap
[MPLS_IPTUNNEL_MAX
+ 1] = {0};
420 mpls_lse_t
*lses
= NULL
;
425 mpls_label_t label
= 0;
427 netlink_parse_rtattr_nested(tb_encap
, MPLS_IPTUNNEL_MAX
, tb
);
428 lses
= (mpls_lse_t
*)RTA_DATA(tb_encap
[MPLS_IPTUNNEL_DST
]);
429 while (!bos
&& num_labels
< MPLS_MAX_LABELS
) {
430 mpls_lse_decode(lses
[num_labels
], &label
, &ttl
, &exp
, &bos
);
431 labels
[num_labels
++] = label
;
437 static enum seg6local_action_t
438 parse_encap_seg6local(struct rtattr
*tb
,
439 struct seg6local_context
*ctx
)
441 struct rtattr
*tb_encap
[SEG6_LOCAL_MAX
+ 1] = {};
442 enum seg6local_action_t act
= ZEBRA_SEG6_LOCAL_ACTION_UNSPEC
;
444 netlink_parse_rtattr_nested(tb_encap
, SEG6_LOCAL_MAX
, tb
);
446 if (tb_encap
[SEG6_LOCAL_ACTION
])
447 act
= *(uint32_t *)RTA_DATA(tb_encap
[SEG6_LOCAL_ACTION
]);
449 if (tb_encap
[SEG6_LOCAL_NH4
])
450 ctx
->nh4
= *(struct in_addr
*)RTA_DATA(
451 tb_encap
[SEG6_LOCAL_NH4
]);
453 if (tb_encap
[SEG6_LOCAL_NH6
])
454 ctx
->nh6
= *(struct in6_addr
*)RTA_DATA(
455 tb_encap
[SEG6_LOCAL_NH6
]);
457 if (tb_encap
[SEG6_LOCAL_TABLE
])
458 ctx
->table
= *(uint32_t *)RTA_DATA(tb_encap
[SEG6_LOCAL_TABLE
]);
460 if (tb_encap
[SEG6_LOCAL_VRFTABLE
])
462 *(uint32_t *)RTA_DATA(tb_encap
[SEG6_LOCAL_VRFTABLE
]);
467 static int parse_encap_seg6(struct rtattr
*tb
, struct in6_addr
*segs
)
469 struct rtattr
*tb_encap
[SEG6_IPTUNNEL_MAX
+ 1] = {};
470 struct seg6_iptunnel_encap
*ipt
= NULL
;
471 struct in6_addr
*segments
= NULL
;
473 netlink_parse_rtattr_nested(tb_encap
, SEG6_IPTUNNEL_MAX
, tb
);
476 * TODO: It's not support multiple SID list.
478 if (tb_encap
[SEG6_IPTUNNEL_SRH
]) {
479 ipt
= (struct seg6_iptunnel_encap
*)
480 RTA_DATA(tb_encap
[SEG6_IPTUNNEL_SRH
]);
481 segments
= ipt
->srh
[0].segments
;
490 static struct nexthop
491 parse_nexthop_unicast(ns_id_t ns_id
, struct rtmsg
*rtm
, struct rtattr
**tb
,
492 enum blackhole_type bh_type
, int index
, void *prefsrc
,
493 void *gate
, afi_t afi
, vrf_id_t vrf_id
)
495 struct interface
*ifp
= NULL
;
496 struct nexthop nh
= {0};
497 mpls_label_t labels
[MPLS_MAX_LABELS
] = {0};
499 enum seg6local_action_t seg6l_act
= ZEBRA_SEG6_LOCAL_ACTION_UNSPEC
;
500 struct seg6local_context seg6l_ctx
= {};
501 struct in6_addr seg6_segs
= {};
504 vrf_id_t nh_vrf_id
= vrf_id
;
505 size_t sz
= (afi
== AFI_IP
) ? 4 : 16;
507 if (bh_type
== BLACKHOLE_UNSPEC
) {
509 nh
.type
= NEXTHOP_TYPE_IFINDEX
;
510 else if (index
&& gate
)
511 nh
.type
= (afi
== AFI_IP
) ? NEXTHOP_TYPE_IPV4_IFINDEX
512 : NEXTHOP_TYPE_IPV6_IFINDEX
;
513 else if (!index
&& gate
)
514 nh
.type
= (afi
== AFI_IP
) ? NEXTHOP_TYPE_IPV4
517 nh
.type
= NEXTHOP_TYPE_BLACKHOLE
;
518 nh
.bh_type
= bh_type
;
521 nh
.type
= NEXTHOP_TYPE_BLACKHOLE
;
522 nh
.bh_type
= bh_type
;
526 memcpy(&nh
.src
, prefsrc
, sz
);
528 memcpy(&nh
.gate
, gate
, sz
);
531 ifp
= if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id
), index
);
533 nh_vrf_id
= ifp
->vrf
->vrf_id
;
535 nh
.vrf_id
= nh_vrf_id
;
537 if (tb
[RTA_ENCAP
] && tb
[RTA_ENCAP_TYPE
]
538 && *(uint16_t *)RTA_DATA(tb
[RTA_ENCAP_TYPE
])
539 == LWTUNNEL_ENCAP_MPLS
) {
540 num_labels
= parse_encap_mpls(tb
[RTA_ENCAP
], labels
);
542 if (tb
[RTA_ENCAP
] && tb
[RTA_ENCAP_TYPE
]
543 && *(uint16_t *)RTA_DATA(tb
[RTA_ENCAP_TYPE
])
544 == LWTUNNEL_ENCAP_SEG6_LOCAL
) {
545 seg6l_act
= parse_encap_seg6local(tb
[RTA_ENCAP
], &seg6l_ctx
);
547 if (tb
[RTA_ENCAP
] && tb
[RTA_ENCAP_TYPE
]
548 && *(uint16_t *)RTA_DATA(tb
[RTA_ENCAP_TYPE
])
549 == LWTUNNEL_ENCAP_SEG6
) {
550 num_segs
= parse_encap_seg6(tb
[RTA_ENCAP
], &seg6_segs
);
553 if (rtm
->rtm_flags
& RTNH_F_ONLINK
)
554 SET_FLAG(nh
.flags
, NEXTHOP_FLAG_ONLINK
);
556 if (rtm
->rtm_flags
& RTNH_F_LINKDOWN
)
557 SET_FLAG(nh
.flags
, NEXTHOP_FLAG_LINKDOWN
);
560 nexthop_add_labels(&nh
, ZEBRA_LSP_STATIC
, num_labels
, labels
);
562 if (seg6l_act
!= ZEBRA_SEG6_LOCAL_ACTION_UNSPEC
)
563 nexthop_add_srv6_seg6local(&nh
, seg6l_act
, &seg6l_ctx
);
566 nexthop_add_srv6_seg6(&nh
, &seg6_segs
);
571 static uint8_t parse_multipath_nexthops_unicast(ns_id_t ns_id
,
572 struct nexthop_group
*ng
,
574 struct rtnexthop
*rtnh
,
576 void *prefsrc
, vrf_id_t vrf_id
)
579 struct interface
*ifp
= NULL
;
582 mpls_label_t labels
[MPLS_MAX_LABELS
] = {0};
584 enum seg6local_action_t seg6l_act
= ZEBRA_SEG6_LOCAL_ACTION_UNSPEC
;
585 struct seg6local_context seg6l_ctx
= {};
586 struct in6_addr seg6_segs
= {};
588 struct rtattr
*rtnh_tb
[RTA_MAX
+ 1] = {};
590 int len
= RTA_PAYLOAD(tb
[RTA_MULTIPATH
]);
591 vrf_id_t nh_vrf_id
= vrf_id
;
594 struct nexthop
*nh
= NULL
;
596 if (len
< (int)sizeof(*rtnh
) || rtnh
->rtnh_len
> len
)
599 index
= rtnh
->rtnh_ifindex
;
602 * Yes we are looking this up
603 * for every nexthop and just
604 * using the last one looked
607 ifp
= if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id
),
610 nh_vrf_id
= ifp
->vrf
->vrf_id
;
613 EC_ZEBRA_UNKNOWN_INTERFACE
,
614 "%s: Unknown interface %u specified, defaulting to VRF_DEFAULT",
616 nh_vrf_id
= VRF_DEFAULT
;
621 if (rtnh
->rtnh_len
> sizeof(*rtnh
)) {
622 netlink_parse_rtattr(rtnh_tb
, RTA_MAX
, RTNH_DATA(rtnh
),
623 rtnh
->rtnh_len
- sizeof(*rtnh
));
624 if (rtnh_tb
[RTA_GATEWAY
])
625 gate
= RTA_DATA(rtnh_tb
[RTA_GATEWAY
]);
626 if (rtnh_tb
[RTA_ENCAP
] && rtnh_tb
[RTA_ENCAP_TYPE
]
627 && *(uint16_t *)RTA_DATA(rtnh_tb
[RTA_ENCAP_TYPE
])
628 == LWTUNNEL_ENCAP_MPLS
) {
629 num_labels
= parse_encap_mpls(
630 rtnh_tb
[RTA_ENCAP
], labels
);
632 if (rtnh_tb
[RTA_ENCAP
] && rtnh_tb
[RTA_ENCAP_TYPE
]
633 && *(uint16_t *)RTA_DATA(rtnh_tb
[RTA_ENCAP_TYPE
])
634 == LWTUNNEL_ENCAP_SEG6_LOCAL
) {
635 seg6l_act
= parse_encap_seg6local(
636 rtnh_tb
[RTA_ENCAP
], &seg6l_ctx
);
638 if (rtnh_tb
[RTA_ENCAP
] && rtnh_tb
[RTA_ENCAP_TYPE
]
639 && *(uint16_t *)RTA_DATA(rtnh_tb
[RTA_ENCAP_TYPE
])
640 == LWTUNNEL_ENCAP_SEG6
) {
641 num_segs
= parse_encap_seg6(rtnh_tb
[RTA_ENCAP
],
646 if (gate
&& rtm
->rtm_family
== AF_INET
) {
648 nh
= nexthop_from_ipv4_ifindex(
649 gate
, prefsrc
, index
, nh_vrf_id
);
651 nh
= nexthop_from_ipv4(gate
, prefsrc
,
653 } else if (gate
&& rtm
->rtm_family
== AF_INET6
) {
655 nh
= nexthop_from_ipv6_ifindex(
656 gate
, index
, nh_vrf_id
);
658 nh
= nexthop_from_ipv6(gate
, nh_vrf_id
);
660 nh
= nexthop_from_ifindex(index
, nh_vrf_id
);
663 nh
->weight
= rtnh
->rtnh_hops
+ 1;
666 nexthop_add_labels(nh
, ZEBRA_LSP_STATIC
,
669 if (seg6l_act
!= ZEBRA_SEG6_LOCAL_ACTION_UNSPEC
)
670 nexthop_add_srv6_seg6local(nh
, seg6l_act
,
674 nexthop_add_srv6_seg6(nh
, &seg6_segs
);
676 if (rtnh
->rtnh_flags
& RTNH_F_ONLINK
)
677 SET_FLAG(nh
->flags
, NEXTHOP_FLAG_ONLINK
);
679 /* Add to temporary list */
680 nexthop_group_add_sorted(ng
, nh
);
683 if (rtnh
->rtnh_len
== 0)
686 len
-= NLMSG_ALIGN(rtnh
->rtnh_len
);
687 rtnh
= RTNH_NEXT(rtnh
);
690 uint8_t nhop_num
= nexthop_group_nexthop_num(ng
);
695 /* Looking up routing table by netlink interface. */
696 int netlink_route_change_read_unicast_internal(struct nlmsghdr
*h
,
697 ns_id_t ns_id
, int startup
,
698 struct zebra_dplane_ctx
*ctx
)
702 struct rtattr
*tb
[RTA_MAX
+ 1];
705 struct prefix_ipv6 src_p
= {};
709 char anyaddr
[16] = {0};
711 int proto
= ZEBRA_ROUTE_KERNEL
;
716 uint8_t distance
= 0;
722 void *prefsrc
= NULL
; /* IPv4 preferred source host address */
723 void *src
= NULL
; /* IPv6 srcdest source prefix */
724 enum blackhole_type bh_type
= BLACKHOLE_UNSPEC
;
726 frrtrace(3, frr_zebra
, netlink_route_change_read_unicast
, h
, ns_id
,
731 if (startup
&& h
->nlmsg_type
!= RTM_NEWROUTE
)
733 switch (rtm
->rtm_type
) {
737 bh_type
= BLACKHOLE_NULL
;
739 case RTN_UNREACHABLE
:
740 bh_type
= BLACKHOLE_REJECT
;
743 bh_type
= BLACKHOLE_ADMINPROHIB
;
746 if (IS_ZEBRA_DEBUG_KERNEL
)
747 zlog_debug("Route rtm_type: %s(%d) intentionally ignoring",
748 nl_rttype_to_str(rtm
->rtm_type
),
753 len
= h
->nlmsg_len
- NLMSG_LENGTH(sizeof(struct rtmsg
));
756 "%s: Message received from netlink is of a broken size %d %zu",
757 __func__
, h
->nlmsg_len
,
758 (size_t)NLMSG_LENGTH(sizeof(struct rtmsg
)));
762 netlink_parse_rtattr(tb
, RTA_MAX
, RTM_RTA(rtm
), len
);
764 if (rtm
->rtm_flags
& RTM_F_CLONED
)
766 if (rtm
->rtm_protocol
== RTPROT_REDIRECT
)
768 if (rtm
->rtm_protocol
== RTPROT_KERNEL
)
771 selfroute
= is_selfroute(rtm
->rtm_protocol
);
773 if (!startup
&& selfroute
&& h
->nlmsg_type
== RTM_NEWROUTE
&&
774 !zrouter
.asic_offloaded
&& !ctx
) {
775 if (IS_ZEBRA_DEBUG_KERNEL
)
776 zlog_debug("Route type: %d Received that we think we have originated, ignoring",
781 /* We don't care about change notifications for the MPLS table. */
782 /* TODO: Revisit this. */
783 if (rtm
->rtm_family
== AF_MPLS
)
786 /* Table corresponding to route. */
788 table
= *(int *)RTA_DATA(tb
[RTA_TABLE
]);
790 table
= rtm
->rtm_table
;
793 vrf_id
= vrf_lookup_by_table(table
, ns_id
);
794 if (vrf_id
== VRF_DEFAULT
) {
795 if (!is_zebra_valid_kernel_table(table
)
796 && !is_zebra_main_routing_table(table
))
800 if (rtm
->rtm_flags
& RTM_F_TRAP
)
801 flags
|= ZEBRA_FLAG_TRAPPED
;
802 if (rtm
->rtm_flags
& RTM_F_OFFLOAD
)
803 flags
|= ZEBRA_FLAG_OFFLOADED
;
804 if (rtm
->rtm_flags
& RTM_F_OFFLOAD_FAILED
)
805 flags
|= ZEBRA_FLAG_OFFLOAD_FAILED
;
807 if (h
->nlmsg_flags
& NLM_F_APPEND
)
808 flags
|= ZEBRA_FLAG_OUTOFSYNC
;
810 /* Route which inserted by Zebra. */
812 flags
|= ZEBRA_FLAG_SELFROUTE
;
813 proto
= proto2zebra(rtm
->rtm_protocol
, rtm
->rtm_family
, false);
816 index
= *(int *)RTA_DATA(tb
[RTA_OIF
]);
819 dest
= RTA_DATA(tb
[RTA_DST
]);
824 src
= RTA_DATA(tb
[RTA_SRC
]);
829 prefsrc
= RTA_DATA(tb
[RTA_PREFSRC
]);
832 gate
= RTA_DATA(tb
[RTA_GATEWAY
]);
835 nhe_id
= *(uint32_t *)RTA_DATA(tb
[RTA_NH_ID
]);
837 if (tb
[RTA_PRIORITY
])
838 metric
= *(int *)RTA_DATA(tb
[RTA_PRIORITY
]);
840 #if defined(SUPPORT_REALMS)
842 tag
= *(uint32_t *)RTA_DATA(tb
[RTA_FLOW
]);
845 if (tb
[RTA_METRICS
]) {
846 struct rtattr
*mxrta
[RTAX_MAX
+ 1];
848 netlink_parse_rtattr(mxrta
, RTAX_MAX
, RTA_DATA(tb
[RTA_METRICS
]),
849 RTA_PAYLOAD(tb
[RTA_METRICS
]));
852 mtu
= *(uint32_t *)RTA_DATA(mxrta
[RTAX_MTU
]);
855 if (rtm
->rtm_family
== AF_INET
) {
857 if (rtm
->rtm_dst_len
> IPV4_MAX_BITLEN
) {
859 "Invalid destination prefix length: %u received from kernel route change",
863 memcpy(&p
.u
.prefix4
, dest
, 4);
864 p
.prefixlen
= rtm
->rtm_dst_len
;
866 if (rtm
->rtm_src_len
!= 0) {
868 EC_ZEBRA_UNSUPPORTED_V4_SRCDEST
,
869 "unsupported IPv4 sourcedest route (dest %pFX vrf %u)",
874 /* Force debug below to not display anything for source */
876 } else if (rtm
->rtm_family
== AF_INET6
) {
878 if (rtm
->rtm_dst_len
> IPV6_MAX_BITLEN
) {
880 "Invalid destination prefix length: %u received from kernel route change",
884 memcpy(&p
.u
.prefix6
, dest
, 16);
885 p
.prefixlen
= rtm
->rtm_dst_len
;
887 src_p
.family
= AF_INET6
;
888 if (rtm
->rtm_src_len
> IPV6_MAX_BITLEN
) {
890 "Invalid source prefix length: %u received from kernel route change",
894 memcpy(&src_p
.prefix
, src
, 16);
895 src_p
.prefixlen
= rtm
->rtm_src_len
;
897 /* We only handle the AFs we handle... */
898 if (IS_ZEBRA_DEBUG_KERNEL
)
899 zlog_debug("%s: unknown address-family %u", __func__
,
905 * For ZEBRA_ROUTE_KERNEL types:
907 * The metric/priority of the route received from the kernel
908 * is a 32 bit number. We are going to interpret the high
909 * order byte as the Admin Distance and the low order 3 bytes
912 * This will allow us to do two things:
913 * 1) Allow the creation of kernel routes that can be
914 * overridden by zebra.
915 * 2) Allow the old behavior for 'most' kernel route types
916 * if a user enters 'ip route ...' v4 routes get a metric
917 * of 0 and v6 routes get a metric of 1024. Both of these
918 * values will end up with a admin distance of 0, which
919 * will cause them to win for the purposes of zebra.
921 if (proto
== ZEBRA_ROUTE_KERNEL
) {
922 distance
= (metric
>> 24) & 0xFF;
923 metric
= (metric
& 0x00FFFFFF);
926 if (IS_ZEBRA_DEBUG_KERNEL
) {
927 char buf2
[PREFIX_STRLEN
];
930 "%s %pFX%s%s vrf %s(%u) table_id: %u metric: %d Admin Distance: %d",
931 nl_msg_type_to_str(h
->nlmsg_type
), &p
,
932 src_p
.prefixlen
? " from " : "",
933 src_p
.prefixlen
? prefix2str(&src_p
, buf2
, sizeof(buf2
))
935 vrf_id_to_name(vrf_id
), vrf_id
, table
, metric
,
940 if (rtm
->rtm_family
== AF_INET6
)
943 if (h
->nlmsg_type
== RTM_NEWROUTE
) {
944 struct route_entry
*re
;
945 struct nexthop_group
*ng
= NULL
;
947 re
= zebra_rib_route_entry_new(vrf_id
, proto
, 0, flags
, nhe_id
,
948 table
, metric
, mtu
, distance
,
951 ng
= nexthop_group_new();
953 if (!tb
[RTA_MULTIPATH
]) {
954 struct nexthop
*nexthop
, nh
;
957 nh
= parse_nexthop_unicast(
958 ns_id
, rtm
, tb
, bh_type
, index
, prefsrc
,
961 nexthop
= nexthop_new();
963 nexthop_group_add_sorted(ng
, nexthop
);
966 /* This is a multipath route */
967 struct rtnexthop
*rtnh
=
968 (struct rtnexthop
*)RTA_DATA(tb
[RTA_MULTIPATH
]);
973 /* Use temporary list of nexthops; parse
974 * message payload's nexthops.
977 parse_multipath_nexthops_unicast(
978 ns_id
, ng
, rtm
, rtnh
, tb
,
981 zserv_nexthop_num_warn(
982 __func__
, (const struct prefix
*)&p
,
986 nexthop_group_delete(&ng
);
992 dplane_rib_add_multipath(afi
, SAFI_UNICAST
, &p
, &src_p
,
993 re
, ng
, startup
, ctx
);
995 nexthop_group_delete(&ng
);
998 * I really don't see how this is possible
999 * but since we are testing for it let's
1000 * let the end user know why the route
1001 * that was just received was swallowed
1005 "%s: %pFX multipath RTM_NEWROUTE has a invalid nexthop group from the kernel",
1007 XFREE(MTYPE_RE
, re
);
1012 "%s: %pFX RTM_DELROUTE received but received a context as well",
1018 rib_delete(afi
, SAFI_UNICAST
, vrf_id
, proto
, 0, flags
,
1019 &p
, &src_p
, NULL
, nhe_id
, table
, metric
,
1022 if (!tb
[RTA_MULTIPATH
]) {
1025 nh
= parse_nexthop_unicast(
1026 ns_id
, rtm
, tb
, bh_type
, index
, prefsrc
,
1028 rib_delete(afi
, SAFI_UNICAST
, vrf_id
, proto
, 0,
1029 flags
, &p
, &src_p
, &nh
, 0, table
,
1030 metric
, distance
, true);
1032 /* XXX: need to compare the entire list of
1033 * nexthops here for NLM_F_APPEND stupidity */
1034 rib_delete(afi
, SAFI_UNICAST
, vrf_id
, proto
, 0,
1035 flags
, &p
, &src_p
, NULL
, 0, table
,
1036 metric
, distance
, true);
1044 static int netlink_route_change_read_unicast(struct nlmsghdr
*h
, ns_id_t ns_id
,
1047 return netlink_route_change_read_unicast_internal(h
, ns_id
, startup
,
1051 static struct mcast_route_data
*mroute
= NULL
;
1053 static int netlink_route_change_read_multicast(struct nlmsghdr
*h
,
1054 ns_id_t ns_id
, int startup
)
1058 struct rtattr
*tb
[RTA_MAX
+ 1];
1059 struct mcast_route_data
*m
;
1064 char oif_list
[256] = "\0";
1071 rtm
= NLMSG_DATA(h
);
1073 len
= h
->nlmsg_len
- NLMSG_LENGTH(sizeof(struct rtmsg
));
1075 netlink_parse_rtattr(tb
, RTA_MAX
, RTM_RTA(rtm
), len
);
1078 table
= *(int *)RTA_DATA(tb
[RTA_TABLE
]);
1080 table
= rtm
->rtm_table
;
1082 vrf
= vrf_lookup_by_table(table
, ns_id
);
1085 iif
= *(int *)RTA_DATA(tb
[RTA_IIF
]);
1088 if (rtm
->rtm_family
== RTNL_FAMILY_IPMR
)
1090 *(struct in_addr
*)RTA_DATA(tb
[RTA_SRC
]);
1093 *(struct in6_addr
*)RTA_DATA(tb
[RTA_SRC
]);
1097 if (rtm
->rtm_family
== RTNL_FAMILY_IPMR
)
1099 *(struct in_addr
*)RTA_DATA(tb
[RTA_DST
]);
1102 *(struct in6_addr
*)RTA_DATA(tb
[RTA_DST
]);
1105 if (tb
[RTA_EXPIRES
])
1106 m
->lastused
= *(unsigned long long *)RTA_DATA(tb
[RTA_EXPIRES
]);
1108 if (tb
[RTA_MULTIPATH
]) {
1109 struct rtnexthop
*rtnh
=
1110 (struct rtnexthop
*)RTA_DATA(tb
[RTA_MULTIPATH
]);
1112 len
= RTA_PAYLOAD(tb
[RTA_MULTIPATH
]);
1114 if (len
< (int)sizeof(*rtnh
) || rtnh
->rtnh_len
> len
)
1117 oif
[oif_count
] = rtnh
->rtnh_ifindex
;
1120 if (rtnh
->rtnh_len
== 0)
1123 len
-= NLMSG_ALIGN(rtnh
->rtnh_len
);
1124 rtnh
= RTNH_NEXT(rtnh
);
1128 if (rtm
->rtm_family
== RTNL_FAMILY_IPMR
) {
1129 SET_IPADDR_V4(&m
->src
);
1130 SET_IPADDR_V4(&m
->grp
);
1131 } else if (rtm
->rtm_family
== RTNL_FAMILY_IP6MR
) {
1132 SET_IPADDR_V6(&m
->src
);
1133 SET_IPADDR_V6(&m
->grp
);
1135 zlog_warn("%s: Invalid rtm_family received", __func__
);
1139 if (IS_ZEBRA_DEBUG_KERNEL
) {
1140 struct interface
*ifp
= NULL
;
1141 struct zebra_vrf
*zvrf
= NULL
;
1143 for (count
= 0; count
< oif_count
; count
++) {
1144 ifp
= if_lookup_by_index(oif
[count
], vrf
);
1147 snprintf(temp
, sizeof(temp
), "%s(%d) ",
1148 ifp
? ifp
->name
: "Unknown", oif
[count
]);
1149 strlcat(oif_list
, temp
, sizeof(oif_list
));
1151 zvrf
= zebra_vrf_lookup_by_id(vrf
);
1152 ifp
= if_lookup_by_index(iif
, vrf
);
1154 "MCAST VRF: %s(%d) %s (%pIA,%pIA) IIF: %s(%d) OIF: %s jiffies: %lld",
1155 zvrf_name(zvrf
), vrf
, nl_msg_type_to_str(h
->nlmsg_type
),
1156 &m
->src
, &m
->grp
, ifp
? ifp
->name
: "Unknown", iif
,
1157 oif_list
, m
->lastused
);
1162 int netlink_route_change(struct nlmsghdr
*h
, ns_id_t ns_id
, int startup
)
1167 rtm
= NLMSG_DATA(h
);
1169 if (!(h
->nlmsg_type
== RTM_NEWROUTE
|| h
->nlmsg_type
== RTM_DELROUTE
)) {
1170 /* If this is not route add/delete message print warning. */
1171 zlog_debug("Kernel message: %s NS %u",
1172 nl_msg_type_to_str(h
->nlmsg_type
), ns_id
);
1176 switch (rtm
->rtm_family
) {
1181 case RTNL_FAMILY_IPMR
:
1182 case RTNL_FAMILY_IP6MR
:
1183 /* notifications on IPMR are irrelevant to zebra, we only care
1184 * about responses to RTM_GETROUTE requests we sent.
1190 EC_ZEBRA_UNKNOWN_FAMILY
,
1191 "Invalid address family: %u received from kernel route change: %s",
1192 rtm
->rtm_family
, nl_msg_type_to_str(h
->nlmsg_type
));
1196 /* Connected route. */
1197 if (IS_ZEBRA_DEBUG_KERNEL
)
1198 zlog_debug("%s %s %s proto %s NS %u",
1199 nl_msg_type_to_str(h
->nlmsg_type
),
1200 nl_family_to_str(rtm
->rtm_family
),
1201 nl_rttype_to_str(rtm
->rtm_type
),
1202 nl_rtproto_to_str(rtm
->rtm_protocol
), ns_id
);
1205 len
= h
->nlmsg_len
- NLMSG_LENGTH(sizeof(struct rtmsg
));
1208 "%s: Message received from netlink is of a broken size: %d %zu",
1209 __func__
, h
->nlmsg_len
,
1210 (size_t)NLMSG_LENGTH(sizeof(struct rtmsg
)));
1214 /* these are "magic" kernel-managed *unicast* routes used for
1215 * outputting locally generated multicast traffic (which uses unicast
1216 * handling on Linux because ~reasons~.
1218 if (rtm
->rtm_type
== RTN_MULTICAST
)
1221 netlink_route_change_read_unicast(h
, ns_id
, startup
);
1225 /* Request for specific route information from the kernel */
1226 static int netlink_request_route(struct zebra_ns
*zns
, int family
, int type
)
1233 /* Form the request, specifying filter (rtattr) if needed. */
1234 memset(&req
, 0, sizeof(req
));
1235 req
.n
.nlmsg_type
= type
;
1236 req
.n
.nlmsg_flags
= NLM_F_ROOT
| NLM_F_MATCH
| NLM_F_REQUEST
;
1237 req
.n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct rtmsg
));
1238 req
.rtm
.rtm_family
= family
;
1240 return netlink_request(&zns
->netlink_cmd
, &req
);
1243 /* Routing table read function using netlink interface. Only called
1245 int netlink_route_read(struct zebra_ns
*zns
)
1248 struct zebra_dplane_info dp_info
;
1250 zebra_dplane_info_from_zns(&dp_info
, zns
, true /*is_cmd*/);
1252 /* Get IPv4 routing table. */
1253 ret
= netlink_request_route(zns
, AF_INET
, RTM_GETROUTE
);
1256 ret
= netlink_parse_info(netlink_route_change_read_unicast
,
1257 &zns
->netlink_cmd
, &dp_info
, 0, true);
1261 /* Get IPv6 routing table. */
1262 ret
= netlink_request_route(zns
, AF_INET6
, RTM_GETROUTE
);
1265 ret
= netlink_parse_info(netlink_route_change_read_unicast
,
1266 &zns
->netlink_cmd
, &dp_info
, 0, true);
1274 * The function returns true if the gateway info could be added
1275 * to the message, otherwise false is returned.
1277 static bool _netlink_route_add_gateway_info(uint8_t route_family
,
1279 struct nlmsghdr
*nlmsg
,
1280 size_t req_size
, int bytelen
,
1281 const struct nexthop
*nexthop
)
1283 if (route_family
== AF_MPLS
) {
1284 struct gw_family_t gw_fam
;
1286 gw_fam
.family
= gw_family
;
1287 if (gw_family
== AF_INET
)
1288 memcpy(&gw_fam
.gate
.ipv4
, &nexthop
->gate
.ipv4
, bytelen
);
1290 memcpy(&gw_fam
.gate
.ipv6
, &nexthop
->gate
.ipv6
, bytelen
);
1291 if (!nl_attr_put(nlmsg
, req_size
, RTA_VIA
, &gw_fam
.family
,
1295 if (!(nexthop
->rparent
1296 && IS_MAPPED_IPV6(&nexthop
->rparent
->gate
.ipv6
))) {
1297 if (gw_family
== AF_INET
) {
1298 if (!nl_attr_put(nlmsg
, req_size
, RTA_GATEWAY
,
1299 &nexthop
->gate
.ipv4
, bytelen
))
1302 if (!nl_attr_put(nlmsg
, req_size
, RTA_GATEWAY
,
1303 &nexthop
->gate
.ipv6
, bytelen
))
1312 static int build_label_stack(struct mpls_label_stack
*nh_label
,
1313 enum lsp_types_t nh_label_type
,
1314 mpls_lse_t
*out_lse
, char *label_buf
,
1315 size_t label_buf_size
)
1317 char label_buf1
[20];
1320 for (int i
= 0; nh_label
&& i
< nh_label
->num_labels
; i
++) {
1321 if (nh_label_type
!= ZEBRA_LSP_EVPN
&&
1322 nh_label
->label
[i
] == MPLS_LABEL_IMPLICIT_NULL
)
1325 if (IS_ZEBRA_DEBUG_KERNEL
) {
1327 snprintf(label_buf
, label_buf_size
, "label %u",
1328 nh_label
->label
[i
]);
1330 snprintf(label_buf1
, sizeof(label_buf1
), "/%u",
1331 nh_label
->label
[i
]);
1332 strlcat(label_buf
, label_buf1
, label_buf_size
);
1336 if (nh_label_type
== ZEBRA_LSP_EVPN
)
1337 out_lse
[num_labels
] = label2vni(&nh_label
->label
[i
]);
1339 out_lse
[num_labels
] =
1340 mpls_lse_encode(nh_label
->label
[i
], 0, 0, 0);
1347 static bool _netlink_nexthop_encode_dvni_label(const struct nexthop
*nexthop
,
1348 struct nlmsghdr
*nlmsg
,
1349 mpls_lse_t
*out_lse
,
1350 size_t buflen
, char *label_buf
)
1352 struct in_addr ipv4
;
1354 if (!nl_attr_put64(nlmsg
, buflen
, LWTUNNEL_IP_ID
,
1355 htonll((uint64_t)out_lse
[0])))
1358 if (nexthop
->type
== NEXTHOP_TYPE_IPV4_IFINDEX
) {
1359 if (!nl_attr_put(nlmsg
, buflen
, LWTUNNEL_IP_DST
,
1360 &nexthop
->gate
.ipv4
, 4))
1363 } else if (nexthop
->type
== NEXTHOP_TYPE_IPV6_IFINDEX
) {
1364 if (IS_MAPPED_IPV6(&nexthop
->gate
.ipv6
)) {
1365 ipv4_mapped_ipv6_to_ipv4(&nexthop
->gate
.ipv6
, &ipv4
);
1366 if (!nl_attr_put(nlmsg
, buflen
, LWTUNNEL_IP_DST
, &ipv4
,
1371 if (!nl_attr_put(nlmsg
, buflen
, LWTUNNEL_IP_DST
,
1372 &nexthop
->gate
.ipv6
, 16))
1376 if (IS_ZEBRA_DEBUG_KERNEL
)
1378 "%s: nexthop %pNHv %s must NEXTHOP_TYPE_IPV*_IFINDEX to be vxlan encapped",
1379 __func__
, nexthop
, label_buf
);
1387 static bool _netlink_route_encode_label_info(const struct nexthop
*nexthop
,
1388 struct nlmsghdr
*nlmsg
,
1389 size_t buflen
, struct rtmsg
*rtmsg
,
1391 size_t label_buf_size
)
1393 mpls_lse_t out_lse
[MPLS_MAX_LABELS
];
1395 struct rtattr
*nest
;
1396 struct mpls_label_stack
*nh_label
;
1397 enum lsp_types_t nh_label_type
;
1399 nh_label
= nexthop
->nh_label
;
1400 nh_label_type
= nexthop
->nh_label_type
;
1403 * label_buf is *only* currently used within debugging.
1404 * As such when we assign it we are guarding it inside
1405 * a debug test. If you want to change this make sure
1406 * you fix this assumption
1408 label_buf
[0] = '\0';
1410 num_labels
= build_label_stack(nh_label
, nh_label_type
, out_lse
,
1411 label_buf
, label_buf_size
);
1413 if (num_labels
&& nh_label_type
== ZEBRA_LSP_EVPN
) {
1414 if (!nl_attr_put16(nlmsg
, buflen
, RTA_ENCAP_TYPE
,
1418 nest
= nl_attr_nest(nlmsg
, buflen
, RTA_ENCAP
);
1422 if (_netlink_nexthop_encode_dvni_label(nexthop
, nlmsg
, out_lse
,
1424 label_buf
) == false)
1427 nl_attr_nest_end(nlmsg
, nest
);
1429 } else if (num_labels
) {
1430 /* Set the BoS bit */
1431 out_lse
[num_labels
- 1] |= htonl(1 << MPLS_LS_S_SHIFT
);
1433 if (rtmsg
->rtm_family
== AF_MPLS
) {
1434 if (!nl_attr_put(nlmsg
, buflen
, RTA_NEWDST
, &out_lse
,
1435 num_labels
* sizeof(mpls_lse_t
)))
1438 if (!nl_attr_put16(nlmsg
, buflen
, RTA_ENCAP_TYPE
,
1439 LWTUNNEL_ENCAP_MPLS
))
1442 nest
= nl_attr_nest(nlmsg
, buflen
, RTA_ENCAP
);
1446 if (!nl_attr_put(nlmsg
, buflen
, MPLS_IPTUNNEL_DST
,
1448 num_labels
* sizeof(mpls_lse_t
)))
1450 nl_attr_nest_end(nlmsg
, nest
);
1457 static bool _netlink_route_encode_nexthop_src(const struct nexthop
*nexthop
,
1459 struct nlmsghdr
*nlmsg
,
1460 size_t buflen
, int bytelen
)
1462 if (family
== AF_INET
) {
1463 if (nexthop
->rmap_src
.ipv4
.s_addr
!= INADDR_ANY
) {
1464 if (!nl_attr_put(nlmsg
, buflen
, RTA_PREFSRC
,
1465 &nexthop
->rmap_src
.ipv4
, bytelen
))
1467 } else if (nexthop
->src
.ipv4
.s_addr
!= INADDR_ANY
) {
1468 if (!nl_attr_put(nlmsg
, buflen
, RTA_PREFSRC
,
1469 &nexthop
->src
.ipv4
, bytelen
))
1472 } else if (family
== AF_INET6
) {
1473 if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop
->rmap_src
.ipv6
)) {
1474 if (!nl_attr_put(nlmsg
, buflen
, RTA_PREFSRC
,
1475 &nexthop
->rmap_src
.ipv6
, bytelen
))
1477 } else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop
->src
.ipv6
)) {
1478 if (!nl_attr_put(nlmsg
, buflen
, RTA_PREFSRC
,
1479 &nexthop
->src
.ipv6
, bytelen
))
1487 static ssize_t
fill_seg6ipt_encap(char *buffer
, size_t buflen
,
1488 const struct in6_addr
*seg
)
1490 struct seg6_iptunnel_encap
*ipt
;
1491 struct ipv6_sr_hdr
*srh
;
1492 const size_t srhlen
= 24;
1495 * Caution: Support only SINGLE-SID, not MULTI-SID
1496 * This function only supports the case where segs represents
1497 * a single SID. If you want to extend the SRv6 functionality,
1498 * you should improve the Boundary Check.
1499 * Ex. In case of set a SID-List include multiple-SIDs as an
1500 * argument of the Transit Behavior, we must support variable
1501 * boundary check for buflen.
1503 if (buflen
< (sizeof(struct seg6_iptunnel_encap
) +
1504 sizeof(struct ipv6_sr_hdr
) + 16))
1507 memset(buffer
, 0, buflen
);
1509 ipt
= (struct seg6_iptunnel_encap
*)buffer
;
1510 ipt
->mode
= SEG6_IPTUN_MODE_ENCAP
;
1512 srh
->hdrlen
= (srhlen
>> 3) - 1;
1514 srh
->segments_left
= 0;
1515 srh
->first_segment
= 0;
1516 memcpy(&srh
->segments
[0], seg
, sizeof(struct in6_addr
));
1521 /* This function takes a nexthop as argument and adds
1522 * the appropriate netlink attributes to an existing
1525 * @param routedesc: Human readable description of route type
1526 * (direct/recursive, single-/multipath)
1527 * @param bytelen: Length of addresses in bytes.
1528 * @param nexthop: Nexthop information
1529 * @param nlmsg: nlmsghdr structure to fill in.
1530 * @param req_size: The size allocated for the message.
1532 * The function returns true if the nexthop could be added
1533 * to the message, otherwise false is returned.
1535 static bool _netlink_route_build_singlepath(const struct prefix
*p
,
1536 const char *routedesc
, int bytelen
,
1537 const struct nexthop
*nexthop
,
1538 struct nlmsghdr
*nlmsg
,
1539 struct rtmsg
*rtmsg
,
1540 size_t req_size
, int cmd
)
1543 char label_buf
[256];
1545 char addrstr
[INET6_ADDRSTRLEN
];
1549 vrf
= vrf_lookup_by_id(nexthop
->vrf_id
);
1551 if (!_netlink_route_encode_label_info(nexthop
, nlmsg
, req_size
, rtmsg
,
1552 label_buf
, sizeof(label_buf
)))
1555 if (nexthop
->nh_srv6
) {
1556 if (nexthop
->nh_srv6
->seg6local_action
!=
1557 ZEBRA_SEG6_LOCAL_ACTION_UNSPEC
) {
1558 struct rtattr
*nest
;
1559 const struct seg6local_context
*ctx
;
1561 ctx
= &nexthop
->nh_srv6
->seg6local_ctx
;
1562 if (!nl_attr_put16(nlmsg
, req_size
, RTA_ENCAP_TYPE
,
1563 LWTUNNEL_ENCAP_SEG6_LOCAL
))
1566 nest
= nl_attr_nest(nlmsg
, req_size
, RTA_ENCAP
);
1570 switch (nexthop
->nh_srv6
->seg6local_action
) {
1571 case ZEBRA_SEG6_LOCAL_ACTION_END
:
1572 if (!nl_attr_put32(nlmsg
, req_size
,
1574 SEG6_LOCAL_ACTION_END
))
1577 case ZEBRA_SEG6_LOCAL_ACTION_END_X
:
1578 if (!nl_attr_put32(nlmsg
, req_size
,
1580 SEG6_LOCAL_ACTION_END_X
))
1582 if (!nl_attr_put(nlmsg
, req_size
,
1583 SEG6_LOCAL_NH6
, &ctx
->nh6
,
1584 sizeof(struct in6_addr
)))
1587 case ZEBRA_SEG6_LOCAL_ACTION_END_T
:
1588 if (!nl_attr_put32(nlmsg
, req_size
,
1590 SEG6_LOCAL_ACTION_END_T
))
1592 if (!nl_attr_put32(nlmsg
, req_size
,
1597 case ZEBRA_SEG6_LOCAL_ACTION_END_DX4
:
1598 if (!nl_attr_put32(nlmsg
, req_size
,
1600 SEG6_LOCAL_ACTION_END_DX4
))
1602 if (!nl_attr_put(nlmsg
, req_size
,
1603 SEG6_LOCAL_NH4
, &ctx
->nh4
,
1604 sizeof(struct in_addr
)))
1607 case ZEBRA_SEG6_LOCAL_ACTION_END_DT6
:
1608 if (!nl_attr_put32(nlmsg
, req_size
,
1610 SEG6_LOCAL_ACTION_END_DT6
))
1612 if (!nl_attr_put32(nlmsg
, req_size
,
1617 case ZEBRA_SEG6_LOCAL_ACTION_END_DT4
:
1618 if (!nl_attr_put32(nlmsg
, req_size
,
1620 SEG6_LOCAL_ACTION_END_DT4
))
1622 if (!nl_attr_put32(nlmsg
, req_size
,
1623 SEG6_LOCAL_VRFTABLE
,
1627 case ZEBRA_SEG6_LOCAL_ACTION_END_DT46
:
1628 if (!nl_attr_put32(nlmsg
, req_size
,
1630 SEG6_LOCAL_ACTION_END_DT46
))
1632 if (!nl_attr_put32(nlmsg
, req_size
,
1633 SEG6_LOCAL_VRFTABLE
,
1637 case ZEBRA_SEG6_LOCAL_ACTION_END_DX2
:
1638 case ZEBRA_SEG6_LOCAL_ACTION_END_DX6
:
1639 case ZEBRA_SEG6_LOCAL_ACTION_END_B6
:
1640 case ZEBRA_SEG6_LOCAL_ACTION_END_B6_ENCAP
:
1641 case ZEBRA_SEG6_LOCAL_ACTION_END_BM
:
1642 case ZEBRA_SEG6_LOCAL_ACTION_END_S
:
1643 case ZEBRA_SEG6_LOCAL_ACTION_END_AS
:
1644 case ZEBRA_SEG6_LOCAL_ACTION_END_AM
:
1645 case ZEBRA_SEG6_LOCAL_ACTION_END_BPF
:
1646 case ZEBRA_SEG6_LOCAL_ACTION_UNSPEC
:
1647 zlog_err("%s: unsupport seg6local behaviour action=%u",
1649 nexthop
->nh_srv6
->seg6local_action
);
1652 nl_attr_nest_end(nlmsg
, nest
);
1655 if (!sid_zero(&nexthop
->nh_srv6
->seg6_segs
)) {
1658 struct rtattr
*nest
;
1660 if (!nl_attr_put16(nlmsg
, req_size
, RTA_ENCAP_TYPE
,
1661 LWTUNNEL_ENCAP_SEG6
))
1663 nest
= nl_attr_nest(nlmsg
, req_size
, RTA_ENCAP
);
1666 tun_len
= fill_seg6ipt_encap(tun_buf
, sizeof(tun_buf
),
1667 &nexthop
->nh_srv6
->seg6_segs
);
1670 if (!nl_attr_put(nlmsg
, req_size
, SEG6_IPTUNNEL_SRH
,
1673 nl_attr_nest_end(nlmsg
, nest
);
1677 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ONLINK
))
1678 rtmsg
->rtm_flags
|= RTNH_F_ONLINK
;
1680 if (is_route_v4_over_v6(rtmsg
->rtm_family
, nexthop
->type
)) {
1681 rtmsg
->rtm_flags
|= RTNH_F_ONLINK
;
1682 if (!nl_attr_put(nlmsg
, req_size
, RTA_GATEWAY
, &ipv4_ll
, 4))
1684 if (!nl_attr_put32(nlmsg
, req_size
, RTA_OIF
, nexthop
->ifindex
))
1687 if (cmd
== RTM_NEWROUTE
) {
1688 if (!_netlink_route_encode_nexthop_src(
1689 nexthop
, AF_INET
, nlmsg
, req_size
, bytelen
))
1693 if (IS_ZEBRA_DEBUG_KERNEL
)
1694 zlog_debug("%s: 5549 (%s): %pFX nexthop via %s %s if %u vrf %s(%u)",
1695 __func__
, routedesc
, p
, ipv4_ll_buf
,
1696 label_buf
, nexthop
->ifindex
,
1697 VRF_LOGNAME(vrf
), nexthop
->vrf_id
);
1701 if (nexthop
->type
== NEXTHOP_TYPE_IPV4
1702 || nexthop
->type
== NEXTHOP_TYPE_IPV4_IFINDEX
) {
1703 /* Send deletes to the kernel without specifying the next-hop */
1704 if (cmd
!= RTM_DELROUTE
) {
1705 if (!_netlink_route_add_gateway_info(
1706 rtmsg
->rtm_family
, AF_INET
, nlmsg
, req_size
,
1711 if (cmd
== RTM_NEWROUTE
) {
1712 if (!_netlink_route_encode_nexthop_src(
1713 nexthop
, AF_INET
, nlmsg
, req_size
, bytelen
))
1717 if (IS_ZEBRA_DEBUG_KERNEL
) {
1718 inet_ntop(AF_INET
, &nexthop
->gate
.ipv4
, addrstr
,
1720 zlog_debug("%s: (%s): %pFX nexthop via %s %s if %u vrf %s(%u)",
1721 __func__
, routedesc
, p
, addrstr
, label_buf
,
1722 nexthop
->ifindex
, VRF_LOGNAME(vrf
),
1727 if (nexthop
->type
== NEXTHOP_TYPE_IPV6
1728 || nexthop
->type
== NEXTHOP_TYPE_IPV6_IFINDEX
) {
1729 if (!_netlink_route_add_gateway_info(rtmsg
->rtm_family
,
1730 AF_INET6
, nlmsg
, req_size
,
1734 if (cmd
== RTM_NEWROUTE
) {
1735 if (!_netlink_route_encode_nexthop_src(
1736 nexthop
, AF_INET6
, nlmsg
, req_size
,
1741 if (IS_ZEBRA_DEBUG_KERNEL
) {
1742 inet_ntop(AF_INET6
, &nexthop
->gate
.ipv6
, addrstr
,
1744 zlog_debug("%s: (%s): %pFX nexthop via %s %s if %u vrf %s(%u)",
1745 __func__
, routedesc
, p
, addrstr
, label_buf
,
1746 nexthop
->ifindex
, VRF_LOGNAME(vrf
),
1752 * We have the ifindex so we should always send it
1753 * This is especially useful if we are doing route
1756 if (nexthop
->type
!= NEXTHOP_TYPE_BLACKHOLE
) {
1757 if (!nl_attr_put32(nlmsg
, req_size
, RTA_OIF
, nexthop
->ifindex
))
1761 if (nexthop
->type
== NEXTHOP_TYPE_IFINDEX
) {
1762 if (cmd
== RTM_NEWROUTE
) {
1763 if (!_netlink_route_encode_nexthop_src(
1764 nexthop
, AF_INET
, nlmsg
, req_size
, bytelen
))
1768 if (IS_ZEBRA_DEBUG_KERNEL
)
1769 zlog_debug("%s: (%s): %pFX nexthop via if %u vrf %s(%u)",
1770 __func__
, routedesc
, p
, nexthop
->ifindex
,
1771 VRF_LOGNAME(vrf
), nexthop
->vrf_id
);
1777 /* This function appends tag value as rtnl flow attribute
1778 * to the given netlink msg only if value is less than 256.
1779 * Used only if SUPPORT_REALMS enabled.
1781 * @param nlmsg: nlmsghdr structure to fill in.
1782 * @param maxlen: The size allocated for the message.
1783 * @param tag: The route tag.
1785 * The function returns true if the flow attribute could
1786 * be added to the message, otherwise false is returned.
1788 static inline bool _netlink_set_tag(struct nlmsghdr
*n
, unsigned int maxlen
,
1791 if (tag
> 0 && tag
<= 255) {
1792 if (!nl_attr_put32(n
, maxlen
, RTA_FLOW
, tag
))
1798 /* This function takes a nexthop as argument and
1799 * appends to the given netlink msg. If the nexthop
1800 * defines a preferred source, the src parameter
1801 * will be modified to point to that src, otherwise
1802 * it will be kept unmodified.
1804 * @param routedesc: Human readable description of route type
1805 * (direct/recursive, single-/multipath)
1806 * @param bytelen: Length of addresses in bytes.
1807 * @param nexthop: Nexthop information
1808 * @param nlmsg: nlmsghdr structure to fill in.
1809 * @param req_size: The size allocated for the message.
1810 * @param src: pointer pointing to a location where
1811 * the prefsrc should be stored.
1813 * The function returns true if the nexthop could be added
1814 * to the message, otherwise false is returned.
1816 static bool _netlink_route_build_multipath(
1817 const struct prefix
*p
, const char *routedesc
, int bytelen
,
1818 const struct nexthop
*nexthop
, struct nlmsghdr
*nlmsg
, size_t req_size
,
1819 struct rtmsg
*rtmsg
, const union g_addr
**src
, route_tag_t tag
)
1821 char label_buf
[256];
1823 struct rtnexthop
*rtnh
;
1825 rtnh
= nl_attr_rtnh(nlmsg
, req_size
);
1831 vrf
= vrf_lookup_by_id(nexthop
->vrf_id
);
1833 if (!_netlink_route_encode_label_info(nexthop
, nlmsg
, req_size
, rtmsg
,
1834 label_buf
, sizeof(label_buf
)))
1837 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ONLINK
))
1838 rtnh
->rtnh_flags
|= RTNH_F_ONLINK
;
1840 if (is_route_v4_over_v6(rtmsg
->rtm_family
, nexthop
->type
)) {
1841 rtnh
->rtnh_flags
|= RTNH_F_ONLINK
;
1842 if (!nl_attr_put(nlmsg
, req_size
, RTA_GATEWAY
, &ipv4_ll
, 4))
1844 rtnh
->rtnh_ifindex
= nexthop
->ifindex
;
1845 if (nexthop
->weight
)
1846 rtnh
->rtnh_hops
= nexthop
->weight
- 1;
1848 if (nexthop
->rmap_src
.ipv4
.s_addr
!= INADDR_ANY
)
1849 *src
= &nexthop
->rmap_src
;
1850 else if (nexthop
->src
.ipv4
.s_addr
!= INADDR_ANY
)
1851 *src
= &nexthop
->src
;
1853 if (IS_ZEBRA_DEBUG_KERNEL
)
1855 "%s: 5549 (%s): %pFX nexthop via %s %s if %u vrf %s(%u)",
1856 __func__
, routedesc
, p
, ipv4_ll_buf
, label_buf
,
1857 nexthop
->ifindex
, VRF_LOGNAME(vrf
),
1859 nl_attr_rtnh_end(nlmsg
, rtnh
);
1863 if (nexthop
->type
== NEXTHOP_TYPE_IPV4
1864 || nexthop
->type
== NEXTHOP_TYPE_IPV4_IFINDEX
) {
1865 if (!_netlink_route_add_gateway_info(rtmsg
->rtm_family
, AF_INET
,
1866 nlmsg
, req_size
, bytelen
,
1870 if (nexthop
->rmap_src
.ipv4
.s_addr
!= INADDR_ANY
)
1871 *src
= &nexthop
->rmap_src
;
1872 else if (nexthop
->src
.ipv4
.s_addr
!= INADDR_ANY
)
1873 *src
= &nexthop
->src
;
1875 if (IS_ZEBRA_DEBUG_KERNEL
)
1876 zlog_debug("%s: (%s): %pFX nexthop via %pI4 %s if %u vrf %s(%u)",
1877 __func__
, routedesc
, p
, &nexthop
->gate
.ipv4
,
1878 label_buf
, nexthop
->ifindex
,
1879 VRF_LOGNAME(vrf
), nexthop
->vrf_id
);
1881 if (nexthop
->type
== NEXTHOP_TYPE_IPV6
1882 || nexthop
->type
== NEXTHOP_TYPE_IPV6_IFINDEX
) {
1883 if (!_netlink_route_add_gateway_info(rtmsg
->rtm_family
,
1884 AF_INET6
, nlmsg
, req_size
,
1888 if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop
->rmap_src
.ipv6
))
1889 *src
= &nexthop
->rmap_src
;
1890 else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop
->src
.ipv6
))
1891 *src
= &nexthop
->src
;
1893 if (IS_ZEBRA_DEBUG_KERNEL
)
1894 zlog_debug("%s: (%s): %pFX nexthop via %pI6 %s if %u vrf %s(%u)",
1895 __func__
, routedesc
, p
, &nexthop
->gate
.ipv6
,
1896 label_buf
, nexthop
->ifindex
,
1897 VRF_LOGNAME(vrf
), nexthop
->vrf_id
);
1901 * We have figured out the ifindex so we should always send it
1902 * This is especially useful if we are doing route
1905 if (nexthop
->type
!= NEXTHOP_TYPE_BLACKHOLE
)
1906 rtnh
->rtnh_ifindex
= nexthop
->ifindex
;
1909 if (nexthop
->type
== NEXTHOP_TYPE_IFINDEX
) {
1910 if (nexthop
->rmap_src
.ipv4
.s_addr
!= INADDR_ANY
)
1911 *src
= &nexthop
->rmap_src
;
1912 else if (nexthop
->src
.ipv4
.s_addr
!= INADDR_ANY
)
1913 *src
= &nexthop
->src
;
1915 if (IS_ZEBRA_DEBUG_KERNEL
)
1916 zlog_debug("%s: (%s): %pFX nexthop via if %u vrf %s(%u)",
1917 __func__
, routedesc
, p
, nexthop
->ifindex
,
1918 VRF_LOGNAME(vrf
), nexthop
->vrf_id
);
1921 if (nexthop
->weight
)
1922 rtnh
->rtnh_hops
= nexthop
->weight
- 1;
1924 if (!_netlink_set_tag(nlmsg
, req_size
, tag
))
1927 nl_attr_rtnh_end(nlmsg
, rtnh
);
1932 _netlink_mpls_build_singlepath(const struct prefix
*p
, const char *routedesc
,
1933 const struct zebra_nhlfe
*nhlfe
,
1934 struct nlmsghdr
*nlmsg
, struct rtmsg
*rtmsg
,
1935 size_t req_size
, int cmd
)
1940 family
= NHLFE_FAMILY(nhlfe
);
1941 bytelen
= (family
== AF_INET
? 4 : 16);
1942 return _netlink_route_build_singlepath(p
, routedesc
, bytelen
,
1943 nhlfe
->nexthop
, nlmsg
, rtmsg
,
1949 _netlink_mpls_build_multipath(const struct prefix
*p
, const char *routedesc
,
1950 const struct zebra_nhlfe
*nhlfe
,
1951 struct nlmsghdr
*nlmsg
, size_t req_size
,
1952 struct rtmsg
*rtmsg
, const union g_addr
**src
)
1957 family
= NHLFE_FAMILY(nhlfe
);
1958 bytelen
= (family
== AF_INET
? 4 : 16);
1959 return _netlink_route_build_multipath(p
, routedesc
, bytelen
,
1960 nhlfe
->nexthop
, nlmsg
, req_size
,
1964 static void _netlink_mpls_debug(int cmd
, uint32_t label
, const char *routedesc
)
1966 if (IS_ZEBRA_DEBUG_KERNEL
)
1967 zlog_debug("netlink_mpls_multipath_msg_encode() (%s): %s %u/20",
1968 routedesc
, nl_msg_type_to_str(cmd
), label
);
1971 static int netlink_neigh_update(int cmd
, int ifindex
, void *addr
, char *lla
,
1972 int llalen
, ns_id_t ns_id
, uint8_t family
,
1973 bool permanent
, uint8_t protocol
)
1981 struct zebra_ns
*zns
= zebra_ns_lookup(ns_id
);
1983 memset(&req
, 0, sizeof(req
));
1985 req
.n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct ndmsg
));
1986 req
.n
.nlmsg_flags
= NLM_F_CREATE
| NLM_F_REQUEST
;
1987 req
.n
.nlmsg_type
= cmd
; // RTM_NEWNEIGH or RTM_DELNEIGH
1988 req
.n
.nlmsg_pid
= zns
->netlink_cmd
.snl
.nl_pid
;
1990 req
.ndm
.ndm_family
= family
;
1991 req
.ndm
.ndm_ifindex
= ifindex
;
1992 req
.ndm
.ndm_type
= RTN_UNICAST
;
1993 if (cmd
== RTM_NEWNEIGH
) {
1995 req
.ndm
.ndm_state
= NUD_REACHABLE
;
1997 req
.ndm
.ndm_state
= NUD_PERMANENT
;
1999 req
.ndm
.ndm_state
= NUD_FAILED
;
2001 nl_attr_put(&req
.n
, sizeof(req
), NDA_PROTOCOL
, &protocol
,
2003 req
.ndm
.ndm_type
= RTN_UNICAST
;
2004 nl_attr_put(&req
.n
, sizeof(req
), NDA_DST
, addr
,
2005 family2addrsize(family
));
2007 nl_attr_put(&req
.n
, sizeof(req
), NDA_LLADDR
, lla
, llalen
);
2009 return netlink_talk(netlink_talk_filter
, &req
.n
, &zns
->netlink_cmd
, zns
,
2013 static bool nexthop_set_src(const struct nexthop
*nexthop
, int family
,
2016 if (family
== AF_INET
) {
2017 if (nexthop
->rmap_src
.ipv4
.s_addr
!= INADDR_ANY
) {
2018 src
->ipv4
= nexthop
->rmap_src
.ipv4
;
2020 } else if (nexthop
->src
.ipv4
.s_addr
!= INADDR_ANY
) {
2021 src
->ipv4
= nexthop
->src
.ipv4
;
2024 } else if (family
== AF_INET6
) {
2025 if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop
->rmap_src
.ipv6
)) {
2026 src
->ipv6
= nexthop
->rmap_src
.ipv6
;
2028 } else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop
->src
.ipv6
)) {
2029 src
->ipv6
= nexthop
->src
.ipv6
;
2038 * The function returns true if the attribute could be added
2039 * to the message, otherwise false is returned.
2041 static int netlink_route_nexthop_encap(struct nlmsghdr
*n
, size_t nlen
,
2044 struct rtattr
*nest
;
2046 switch (nh
->nh_encap_type
) {
2048 if (!nl_attr_put16(n
, nlen
, RTA_ENCAP_TYPE
, nh
->nh_encap_type
))
2051 nest
= nl_attr_nest(n
, nlen
, RTA_ENCAP
);
2055 if (!nl_attr_put32(n
, nlen
, 0 /* VXLAN_VNI */,
2058 nl_attr_nest_end(n
, nest
);
2066 * Routing table change via netlink interface, using a dataplane context object
2068 * Returns -1 on failure, 0 when the msg doesn't fit entirely in the buffer
2069 * otherwise the number of bytes written to buf.
2071 ssize_t
netlink_route_multipath_msg_encode(int cmd
,
2072 struct zebra_dplane_ctx
*ctx
,
2073 uint8_t *data
, size_t datalen
,
2074 bool fpm
, bool force_nhg
)
2077 struct nexthop
*nexthop
= NULL
;
2078 unsigned int nexthop_num
;
2079 const char *routedesc
;
2080 bool setsrc
= false;
2082 const struct prefix
*p
, *src_p
;
2085 route_tag_t tag
= 0;
2091 } *req
= (void *)data
;
2093 p
= dplane_ctx_get_dest(ctx
);
2094 src_p
= dplane_ctx_get_src(ctx
);
2096 if (datalen
< sizeof(*req
))
2099 nl
= kernel_netlink_nlsock_lookup(dplane_ctx_get_ns_sock(ctx
));
2101 memset(req
, 0, sizeof(*req
));
2103 bytelen
= (p
->family
== AF_INET
? 4 : 16);
2105 req
->n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct rtmsg
));
2106 req
->n
.nlmsg_flags
= NLM_F_CREATE
| NLM_F_REQUEST
;
2108 if ((cmd
== RTM_NEWROUTE
) &&
2109 ((p
->family
== AF_INET
) || v6_rr_semantics
))
2110 req
->n
.nlmsg_flags
|= NLM_F_REPLACE
;
2112 req
->n
.nlmsg_type
= cmd
;
2114 req
->n
.nlmsg_pid
= nl
->snl
.nl_pid
;
2116 req
->r
.rtm_family
= p
->family
;
2117 req
->r
.rtm_dst_len
= p
->prefixlen
;
2118 req
->r
.rtm_src_len
= src_p
? src_p
->prefixlen
: 0;
2119 req
->r
.rtm_scope
= RT_SCOPE_UNIVERSE
;
2121 if (cmd
== RTM_DELROUTE
)
2122 req
->r
.rtm_protocol
= zebra2proto(dplane_ctx_get_old_type(ctx
));
2124 req
->r
.rtm_protocol
= zebra2proto(dplane_ctx_get_type(ctx
));
2127 * blackhole routes are not RTN_UNICAST, they are
2128 * RTN_ BLACKHOLE|UNREACHABLE|PROHIBIT
2129 * so setting this value as a RTN_UNICAST would
2130 * cause the route lookup of just the prefix
2131 * to fail. So no need to specify this for
2132 * the RTM_DELROUTE case
2134 if (cmd
!= RTM_DELROUTE
)
2135 req
->r
.rtm_type
= RTN_UNICAST
;
2137 if (!nl_attr_put(&req
->n
, datalen
, RTA_DST
, &p
->u
.prefix
, bytelen
))
2140 if (!nl_attr_put(&req
->n
, datalen
, RTA_SRC
, &src_p
->u
.prefix
,
2146 /* Hardcode the metric for all routes coming from zebra. Metric isn't
2148 * either by the kernel or by zebra. Its purely for calculating best
2150 * by the routing protocol and for communicating with protocol peers.
2152 if (!nl_attr_put32(&req
->n
, datalen
, RTA_PRIORITY
,
2153 ROUTE_INSTALLATION_METRIC
))
2156 #if defined(SUPPORT_REALMS)
2157 if (cmd
== RTM_DELROUTE
)
2158 tag
= dplane_ctx_get_old_tag(ctx
);
2160 tag
= dplane_ctx_get_tag(ctx
);
2163 /* Table corresponding to this route. */
2164 table_id
= dplane_ctx_get_table(ctx
);
2166 req
->r
.rtm_table
= table_id
;
2168 req
->r
.rtm_table
= RT_TABLE_UNSPEC
;
2169 if (!nl_attr_put32(&req
->n
, datalen
, RTA_TABLE
, table_id
))
2173 if (IS_ZEBRA_DEBUG_KERNEL
)
2175 "%s: %s %pFX vrf %u(%u)", __func__
,
2176 nl_msg_type_to_str(cmd
), p
, dplane_ctx_get_vrf(ctx
),
2180 * If we are not updating the route and we have received
2181 * a route delete, then all we need to fill in is the
2182 * prefix information to tell the kernel to schwack
2185 if (cmd
== RTM_DELROUTE
) {
2186 if (!_netlink_set_tag(&req
->n
, datalen
, tag
))
2188 return NLMSG_ALIGN(req
->n
.nlmsg_len
);
2191 if (dplane_ctx_get_mtu(ctx
) || dplane_ctx_get_nh_mtu(ctx
)) {
2192 struct rtattr
*nest
;
2193 uint32_t mtu
= dplane_ctx_get_mtu(ctx
);
2194 uint32_t nexthop_mtu
= dplane_ctx_get_nh_mtu(ctx
);
2196 if (!mtu
|| (nexthop_mtu
&& nexthop_mtu
< mtu
))
2199 nest
= nl_attr_nest(&req
->n
, datalen
, RTA_METRICS
);
2203 if (!nl_attr_put(&req
->n
, datalen
, RTAX_MTU
, &mtu
, sizeof(mtu
)))
2205 nl_attr_nest_end(&req
->n
, nest
);
2209 * Always install blackhole routes without using nexthops, because of
2210 * the following kernel problems:
2211 * 1. Kernel nexthops don't suport unreachable/prohibit route types.
2212 * 2. Blackhole kernel nexthops are deleted when loopback is down.
2214 nexthop
= dplane_ctx_get_ng(ctx
)->nexthop
;
2216 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_RECURSIVE
))
2217 nexthop
= nexthop
->resolved
;
2219 if (nexthop
->type
== NEXTHOP_TYPE_BLACKHOLE
) {
2220 switch (nexthop
->bh_type
) {
2221 case BLACKHOLE_ADMINPROHIB
:
2222 req
->r
.rtm_type
= RTN_PROHIBIT
;
2224 case BLACKHOLE_REJECT
:
2225 req
->r
.rtm_type
= RTN_UNREACHABLE
;
2227 case BLACKHOLE_UNSPEC
:
2228 case BLACKHOLE_NULL
:
2229 req
->r
.rtm_type
= RTN_BLACKHOLE
;
2232 return NLMSG_ALIGN(req
->n
.nlmsg_len
);
2236 if ((!fpm
&& kernel_nexthops_supported()
2237 && (!proto_nexthops_only()
2238 || is_proto_nhg(dplane_ctx_get_nhe_id(ctx
), 0)))
2239 || (fpm
&& force_nhg
)) {
2240 /* Kernel supports nexthop objects */
2241 if (IS_ZEBRA_DEBUG_KERNEL
)
2242 zlog_debug("%s: %pFX nhg_id is %u", __func__
, p
,
2243 dplane_ctx_get_nhe_id(ctx
));
2245 if (!nl_attr_put32(&req
->n
, datalen
, RTA_NH_ID
,
2246 dplane_ctx_get_nhe_id(ctx
)))
2249 /* Have to determine src still */
2250 for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx
), nexthop
)) {
2254 setsrc
= nexthop_set_src(nexthop
, p
->family
, &src
);
2258 if (p
->family
== AF_INET
) {
2259 if (!nl_attr_put(&req
->n
, datalen
, RTA_PREFSRC
,
2260 &src
.ipv4
, bytelen
))
2262 } else if (p
->family
== AF_INET6
) {
2263 if (!nl_attr_put(&req
->n
, datalen
, RTA_PREFSRC
,
2264 &src
.ipv6
, bytelen
))
2269 return NLMSG_ALIGN(req
->n
.nlmsg_len
);
2272 /* Count overall nexthops so we can decide whether to use singlepath
2273 * or multipath case.
2276 for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx
), nexthop
)) {
2277 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_RECURSIVE
))
2279 if (!NEXTHOP_IS_ACTIVE(nexthop
->flags
))
2285 /* Singlepath case. */
2286 if (nexthop_num
== 1) {
2288 for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx
), nexthop
)) {
2289 if (CHECK_FLAG(nexthop
->flags
,
2290 NEXTHOP_FLAG_RECURSIVE
)) {
2295 setsrc
= nexthop_set_src(nexthop
, p
->family
,
2300 if (NEXTHOP_IS_ACTIVE(nexthop
->flags
)) {
2301 routedesc
= nexthop
->rparent
2302 ? "recursive, single-path"
2305 if (!_netlink_set_tag(&req
->n
, datalen
, tag
))
2308 if (!_netlink_route_build_singlepath(
2309 p
, routedesc
, bytelen
, nexthop
,
2310 &req
->n
, &req
->r
, datalen
, cmd
))
2317 * Add encapsulation information when installing via
2321 if (!netlink_route_nexthop_encap(
2322 &req
->n
, datalen
, nexthop
))
2328 if (p
->family
== AF_INET
) {
2329 if (!nl_attr_put(&req
->n
, datalen
, RTA_PREFSRC
,
2330 &src
.ipv4
, bytelen
))
2332 } else if (p
->family
== AF_INET6
) {
2333 if (!nl_attr_put(&req
->n
, datalen
, RTA_PREFSRC
,
2334 &src
.ipv6
, bytelen
))
2338 } else { /* Multipath case */
2339 struct rtattr
*nest
;
2340 const union g_addr
*src1
= NULL
;
2342 nest
= nl_attr_nest(&req
->n
, datalen
, RTA_MULTIPATH
);
2347 for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx
), nexthop
)) {
2348 if (CHECK_FLAG(nexthop
->flags
,
2349 NEXTHOP_FLAG_RECURSIVE
)) {
2350 /* This only works for IPv4 now */
2354 setsrc
= nexthop_set_src(nexthop
, p
->family
,
2359 if (NEXTHOP_IS_ACTIVE(nexthop
->flags
)) {
2360 routedesc
= nexthop
->rparent
2361 ? "recursive, multipath"
2365 if (!_netlink_route_build_multipath(
2366 p
, routedesc
, bytelen
, nexthop
,
2367 &req
->n
, datalen
, &req
->r
, &src1
,
2371 if (!setsrc
&& src1
) {
2372 if (p
->family
== AF_INET
)
2373 src
.ipv4
= src1
->ipv4
;
2374 else if (p
->family
== AF_INET6
)
2375 src
.ipv6
= src1
->ipv6
;
2382 nl_attr_nest_end(&req
->n
, nest
);
2385 * Add encapsulation information when installing via
2389 for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx
),
2391 if (CHECK_FLAG(nexthop
->flags
,
2392 NEXTHOP_FLAG_RECURSIVE
))
2394 if (!netlink_route_nexthop_encap(
2395 &req
->n
, datalen
, nexthop
))
2402 if (p
->family
== AF_INET
) {
2403 if (!nl_attr_put(&req
->n
, datalen
, RTA_PREFSRC
,
2404 &src
.ipv4
, bytelen
))
2406 } else if (p
->family
== AF_INET6
) {
2407 if (!nl_attr_put(&req
->n
, datalen
, RTA_PREFSRC
,
2408 &src
.ipv6
, bytelen
))
2411 if (IS_ZEBRA_DEBUG_KERNEL
)
2412 zlog_debug("Setting source");
2416 /* If there is no useful nexthop then return. */
2417 if (nexthop_num
== 0) {
2418 if (IS_ZEBRA_DEBUG_KERNEL
)
2419 zlog_debug("%s: No useful nexthop.", __func__
);
2422 return NLMSG_ALIGN(req
->n
.nlmsg_len
);
2425 int kernel_get_ipmr_sg_stats(struct zebra_vrf
*zvrf
, void *in
)
2427 uint32_t actual_table
;
2429 struct mcast_route_data
*mr
= (struct mcast_route_data
*)in
;
2437 struct zebra_ns
*zns
;
2440 memset(&req
, 0, sizeof(req
));
2442 req
.n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct rtmsg
));
2443 req
.n
.nlmsg_flags
= NLM_F_REQUEST
;
2444 req
.n
.nlmsg_pid
= zns
->netlink_cmd
.snl
.nl_pid
;
2446 req
.n
.nlmsg_type
= RTM_GETROUTE
;
2448 if (mroute
->family
== AF_INET
) {
2449 req
.rtm
.rtm_family
= RTNL_FAMILY_IPMR
;
2450 req
.rtm
.rtm_dst_len
= IPV4_MAX_BITLEN
;
2451 req
.rtm
.rtm_src_len
= IPV4_MAX_BITLEN
;
2453 nl_attr_put(&req
.n
, sizeof(req
), RTA_SRC
,
2454 &mroute
->src
.ipaddr_v4
,
2455 sizeof(mroute
->src
.ipaddr_v4
));
2456 nl_attr_put(&req
.n
, sizeof(req
), RTA_DST
,
2457 &mroute
->grp
.ipaddr_v4
,
2458 sizeof(mroute
->grp
.ipaddr_v4
));
2460 req
.rtm
.rtm_family
= RTNL_FAMILY_IP6MR
;
2461 req
.rtm
.rtm_dst_len
= IPV6_MAX_BITLEN
;
2462 req
.rtm
.rtm_src_len
= IPV6_MAX_BITLEN
;
2464 nl_attr_put(&req
.n
, sizeof(req
), RTA_SRC
,
2465 &mroute
->src
.ipaddr_v6
,
2466 sizeof(mroute
->src
.ipaddr_v6
));
2467 nl_attr_put(&req
.n
, sizeof(req
), RTA_DST
,
2468 &mroute
->grp
.ipaddr_v6
,
2469 sizeof(mroute
->grp
.ipaddr_v6
));
2475 * So during the namespace cleanup we started storing
2476 * the zvrf table_id for the default table as RT_TABLE_MAIN
2477 * which is what the normal routing table for ip routing is.
2478 * This change caused this to break our lookups of sg data
2479 * because prior to this change the zvrf->table_id was 0
2480 * and when the pim multicast kernel code saw a 0,
2481 * it was auto-translated to RT_TABLE_DEFAULT. But since
2482 * we are now passing in RT_TABLE_MAIN there is no auto-translation
2483 * and the kernel goes screw you and the delicious cookies you
2484 * are trying to give me. So now we have this little hack.
2486 if (mroute
->family
== AF_INET
)
2487 actual_table
= (zvrf
->table_id
== RT_TABLE_MAIN
)
2491 actual_table
= zvrf
->table_id
;
2493 nl_attr_put32(&req
.n
, sizeof(req
), RTA_TABLE
, actual_table
);
2495 suc
= netlink_talk(netlink_route_change_read_multicast
, &req
.n
,
2496 &zns
->netlink_cmd
, zns
, false);
2502 /* Char length to debug ID with */
2503 #define ID_LENGTH 10
2505 static bool _netlink_nexthop_build_group(struct nlmsghdr
*n
, size_t req_size
,
2507 const struct nh_grp
*z_grp
,
2508 const uint8_t count
, bool resilient
,
2509 const struct nhg_resilience
*nhgr
)
2511 struct nexthop_grp grp
[count
];
2512 /* Need space for max group size, "/", and null term */
2513 char buf
[(MULTIPATH_NUM
* (ID_LENGTH
+ 1)) + 1];
2514 char buf1
[ID_LENGTH
+ 2];
2518 memset(grp
, 0, sizeof(grp
));
2521 for (int i
= 0; i
< count
; i
++) {
2522 grp
[i
].id
= z_grp
[i
].id
;
2523 grp
[i
].weight
= z_grp
[i
].weight
- 1;
2525 if (IS_ZEBRA_DEBUG_KERNEL
) {
2527 snprintf(buf
, sizeof(buf1
), "group %u",
2530 snprintf(buf1
, sizeof(buf1
), "/%u",
2532 strlcat(buf
, buf1
, sizeof(buf
));
2536 if (!nl_attr_put(n
, req_size
, NHA_GROUP
, grp
,
2537 count
* sizeof(*grp
)))
2541 struct rtattr
*nest
;
2543 nest
= nl_attr_nest(n
, req_size
, NHA_RES_GROUP
);
2545 nl_attr_put16(n
, req_size
, NHA_RES_GROUP_BUCKETS
,
2547 nl_attr_put32(n
, req_size
, NHA_RES_GROUP_IDLE_TIMER
,
2548 nhgr
->idle_timer
* 1000);
2549 nl_attr_put32(n
, req_size
,
2550 NHA_RES_GROUP_UNBALANCED_TIMER
,
2551 nhgr
->unbalanced_timer
* 1000);
2552 nl_attr_nest_end(n
, nest
);
2554 nl_attr_put16(n
, req_size
, NHA_GROUP_TYPE
,
2555 NEXTHOP_GRP_TYPE_RES
);
2559 if (IS_ZEBRA_DEBUG_KERNEL
)
2560 zlog_debug("%s: ID (%u): %s", __func__
, id
, buf
);
2566 * Next hop packet encoding helper function.
2568 * \param[in] cmd netlink command.
2569 * \param[in] ctx dataplane context (information snapshot).
2570 * \param[out] buf buffer to hold the packet.
2571 * \param[in] buflen amount of buffer bytes.
2573 * \returns -1 on failure, 0 when the msg doesn't fit entirely in the buffer
2574 * otherwise the number of bytes written to buf.
2576 ssize_t
netlink_nexthop_msg_encode(uint16_t cmd
,
2577 const struct zebra_dplane_ctx
*ctx
,
2578 void *buf
, size_t buflen
, bool fpm
)
2586 mpls_lse_t out_lse
[MPLS_MAX_LABELS
];
2587 char label_buf
[256];
2589 uint32_t id
= dplane_ctx_get_nhe_id(ctx
);
2590 int type
= dplane_ctx_get_nhe_type(ctx
);
2591 struct rtattr
*nest
;
2594 kernel_netlink_nlsock_lookup(dplane_ctx_get_ns_sock(ctx
));
2598 EC_ZEBRA_NHG_FIB_UPDATE
,
2599 "Failed trying to update a nexthop group in the kernel that does not have an ID");
2604 * Nothing to do if the kernel doesn't support nexthop objects or
2605 * we dont want to install this type of NHG, but FPM may possible to
2608 if (!fpm
&& !kernel_nexthops_supported()) {
2609 if (IS_ZEBRA_DEBUG_KERNEL
|| IS_ZEBRA_DEBUG_NHG
)
2611 "%s: nhg_id %u (%s): kernel nexthops not supported, ignoring",
2612 __func__
, id
, zebra_route_string(type
));
2616 if (proto_nexthops_only() && !is_proto_nhg(id
, type
)) {
2617 if (IS_ZEBRA_DEBUG_KERNEL
|| IS_ZEBRA_DEBUG_NHG
)
2619 "%s: nhg_id %u (%s): proto-based nexthops only, ignoring",
2620 __func__
, id
, zebra_route_string(type
));
2624 label_buf
[0] = '\0';
2626 if (buflen
< sizeof(*req
))
2629 memset(req
, 0, sizeof(*req
));
2631 req
->n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct nhmsg
));
2632 req
->n
.nlmsg_flags
= NLM_F_CREATE
| NLM_F_REQUEST
;
2634 if (cmd
== RTM_NEWNEXTHOP
)
2635 req
->n
.nlmsg_flags
|= NLM_F_REPLACE
;
2637 req
->n
.nlmsg_type
= cmd
;
2638 req
->n
.nlmsg_pid
= nl
->snl
.nl_pid
;
2640 req
->nhm
.nh_family
= AF_UNSPEC
;
2643 if (!nl_attr_put32(&req
->n
, buflen
, NHA_ID
, id
))
2646 if (cmd
== RTM_NEWNEXTHOP
) {
2648 * We distinguish between a "group", which is a collection
2649 * of ids, and a singleton nexthop with an id. The
2650 * group is installed as an id that just refers to a list of
2653 if (dplane_ctx_get_nhe_nh_grp_count(ctx
)) {
2654 const struct nexthop_group
*nhg
;
2655 const struct nhg_resilience
*nhgr
;
2657 nhg
= dplane_ctx_get_nhe_ng(ctx
);
2659 if (!_netlink_nexthop_build_group(
2660 &req
->n
, buflen
, id
,
2661 dplane_ctx_get_nhe_nh_grp(ctx
),
2662 dplane_ctx_get_nhe_nh_grp_count(ctx
),
2663 !!nhgr
->buckets
, nhgr
))
2666 const struct nexthop
*nh
=
2667 dplane_ctx_get_nhe_ng(ctx
)->nexthop
;
2668 afi_t afi
= dplane_ctx_get_nhe_afi(ctx
);
2671 req
->nhm
.nh_family
= AF_INET
;
2672 else if (afi
== AFI_IP6
)
2673 req
->nhm
.nh_family
= AF_INET6
;
2676 case NEXTHOP_TYPE_IPV4
:
2677 case NEXTHOP_TYPE_IPV4_IFINDEX
:
2678 if (!nl_attr_put(&req
->n
, buflen
, NHA_GATEWAY
,
2683 case NEXTHOP_TYPE_IPV6
:
2684 case NEXTHOP_TYPE_IPV6_IFINDEX
:
2685 if (!nl_attr_put(&req
->n
, buflen
, NHA_GATEWAY
,
2690 case NEXTHOP_TYPE_BLACKHOLE
:
2691 if (!nl_attr_put(&req
->n
, buflen
, NHA_BLACKHOLE
,
2694 /* Blackhole shouldn't have anymore attributes
2697 case NEXTHOP_TYPE_IFINDEX
:
2698 /* Don't need anymore info for this */
2704 EC_ZEBRA_NHG_FIB_UPDATE
,
2705 "Context received for kernel nexthop update without an interface");
2709 if (!nl_attr_put32(&req
->n
, buflen
, NHA_OIF
,
2713 if (CHECK_FLAG(nh
->flags
, NEXTHOP_FLAG_ONLINK
))
2714 req
->nhm
.nh_flags
|= RTNH_F_ONLINK
;
2716 num_labels
= build_label_stack(
2717 nh
->nh_label
, nh
->nh_label_type
, out_lse
,
2718 label_buf
, sizeof(label_buf
));
2720 if (num_labels
&& nh
->nh_label_type
== ZEBRA_LSP_EVPN
) {
2721 if (!nl_attr_put16(&req
->n
, buflen
,
2726 nest
= nl_attr_nest(&req
->n
, buflen
, NHA_ENCAP
);
2730 if (_netlink_nexthop_encode_dvni_label(
2731 nh
, &req
->n
, out_lse
, buflen
,
2732 label_buf
) == false)
2735 nl_attr_nest_end(&req
->n
, nest
);
2737 } else if (num_labels
) {
2738 /* Set the BoS bit */
2739 out_lse
[num_labels
- 1] |=
2740 htonl(1 << MPLS_LS_S_SHIFT
);
2743 * TODO: MPLS unsupported for now in kernel.
2745 if (req
->nhm
.nh_family
== AF_MPLS
)
2748 encap
= LWTUNNEL_ENCAP_MPLS
;
2749 if (!nl_attr_put16(&req
->n
, buflen
,
2750 NHA_ENCAP_TYPE
, encap
))
2752 nest
= nl_attr_nest(&req
->n
, buflen
, NHA_ENCAP
);
2756 &req
->n
, buflen
, MPLS_IPTUNNEL_DST
,
2758 num_labels
* sizeof(mpls_lse_t
)))
2761 nl_attr_nest_end(&req
->n
, nest
);
2765 if (nh
->nh_srv6
->seg6local_action
!=
2766 ZEBRA_SEG6_LOCAL_ACTION_UNSPEC
) {
2769 struct rtattr
*nest
;
2770 const struct seg6local_context
*ctx
;
2772 req
->nhm
.nh_family
= AF_INET6
;
2773 action
= nh
->nh_srv6
->seg6local_action
;
2774 ctx
= &nh
->nh_srv6
->seg6local_ctx
;
2775 encap
= LWTUNNEL_ENCAP_SEG6_LOCAL
;
2776 if (!nl_attr_put(&req
->n
, buflen
,
2782 nest
= nl_attr_nest(&req
->n
, buflen
,
2783 NHA_ENCAP
| NLA_F_NESTED
);
2788 case SEG6_LOCAL_ACTION_END
:
2792 SEG6_LOCAL_ACTION_END
))
2795 case SEG6_LOCAL_ACTION_END_X
:
2799 SEG6_LOCAL_ACTION_END_X
))
2803 SEG6_LOCAL_NH6
, &ctx
->nh6
,
2804 sizeof(struct in6_addr
)))
2807 case SEG6_LOCAL_ACTION_END_T
:
2811 SEG6_LOCAL_ACTION_END_T
))
2819 case SEG6_LOCAL_ACTION_END_DX4
:
2823 SEG6_LOCAL_ACTION_END_DX4
))
2827 SEG6_LOCAL_NH4
, &ctx
->nh4
,
2828 sizeof(struct in_addr
)))
2831 case SEG6_LOCAL_ACTION_END_DT6
:
2835 SEG6_LOCAL_ACTION_END_DT6
))
2843 case SEG6_LOCAL_ACTION_END_DT4
:
2847 SEG6_LOCAL_ACTION_END_DT4
))
2851 SEG6_LOCAL_VRFTABLE
,
2855 case SEG6_LOCAL_ACTION_END_DT46
:
2859 SEG6_LOCAL_ACTION_END_DT46
))
2863 SEG6_LOCAL_VRFTABLE
,
2868 zlog_err("%s: unsupport seg6local behaviour action=%u",
2872 nl_attr_nest_end(&req
->n
, nest
);
2875 if (!sid_zero(&nh
->nh_srv6
->seg6_segs
)) {
2878 struct rtattr
*nest
;
2880 if (!nl_attr_put16(&req
->n
, buflen
,
2882 LWTUNNEL_ENCAP_SEG6
))
2884 nest
= nl_attr_nest(&req
->n
, buflen
,
2885 NHA_ENCAP
| NLA_F_NESTED
);
2888 tun_len
= fill_seg6ipt_encap(tun_buf
,
2890 &nh
->nh_srv6
->seg6_segs
);
2893 if (!nl_attr_put(&req
->n
, buflen
,
2897 nl_attr_nest_end(&req
->n
, nest
);
2903 if (IS_ZEBRA_DEBUG_KERNEL
)
2904 zlog_debug("%s: ID (%u): %pNHv(%d) vrf %s(%u) %s ",
2905 __func__
, id
, nh
, nh
->ifindex
,
2906 vrf_id_to_name(nh
->vrf_id
),
2907 nh
->vrf_id
, label_buf
);
2910 req
->nhm
.nh_protocol
= zebra2proto(type
);
2912 } else if (cmd
!= RTM_DELNEXTHOP
) {
2914 EC_ZEBRA_NHG_FIB_UPDATE
,
2915 "Nexthop group kernel update command (%d) does not exist",
2920 if (IS_ZEBRA_DEBUG_KERNEL
)
2921 zlog_debug("%s: %s, id=%u", __func__
, nl_msg_type_to_str(cmd
),
2924 return NLMSG_ALIGN(req
->n
.nlmsg_len
);
2927 static ssize_t
netlink_nexthop_msg_encoder(struct zebra_dplane_ctx
*ctx
,
2928 void *buf
, size_t buflen
)
2930 enum dplane_op_e op
;
2933 op
= dplane_ctx_get_op(ctx
);
2934 if (op
== DPLANE_OP_NH_INSTALL
|| op
== DPLANE_OP_NH_UPDATE
)
2935 cmd
= RTM_NEWNEXTHOP
;
2936 else if (op
== DPLANE_OP_NH_DELETE
)
2937 cmd
= RTM_DELNEXTHOP
;
2939 flog_err(EC_ZEBRA_NHG_FIB_UPDATE
,
2940 "Context received for kernel nexthop update with incorrect OP code (%u)",
2945 return netlink_nexthop_msg_encode(cmd
, ctx
, buf
, buflen
, false);
2948 enum netlink_msg_status
2949 netlink_put_nexthop_update_msg(struct nl_batch
*bth
,
2950 struct zebra_dplane_ctx
*ctx
)
2952 /* Nothing to do if the kernel doesn't support nexthop objects */
2953 if (!kernel_nexthops_supported())
2954 return FRR_NETLINK_SUCCESS
;
2956 return netlink_batch_add_msg(bth
, ctx
, netlink_nexthop_msg_encoder
,
2960 static ssize_t
netlink_newroute_msg_encoder(struct zebra_dplane_ctx
*ctx
,
2961 void *buf
, size_t buflen
)
2963 return netlink_route_multipath_msg_encode(RTM_NEWROUTE
, ctx
, buf
,
2964 buflen
, false, false);
2967 static ssize_t
netlink_delroute_msg_encoder(struct zebra_dplane_ctx
*ctx
,
2968 void *buf
, size_t buflen
)
2970 return netlink_route_multipath_msg_encode(RTM_DELROUTE
, ctx
, buf
,
2971 buflen
, false, false);
2974 enum netlink_msg_status
2975 netlink_put_route_update_msg(struct nl_batch
*bth
, struct zebra_dplane_ctx
*ctx
)
2978 const struct prefix
*p
= dplane_ctx_get_dest(ctx
);
2980 if (dplane_ctx_get_op(ctx
) == DPLANE_OP_ROUTE_DELETE
) {
2982 } else if (dplane_ctx_get_op(ctx
) == DPLANE_OP_ROUTE_INSTALL
) {
2984 } else if (dplane_ctx_get_op(ctx
) == DPLANE_OP_ROUTE_UPDATE
) {
2986 if (p
->family
== AF_INET
|| v6_rr_semantics
) {
2987 /* Single 'replace' operation */
2990 * With route replace semantics in place
2991 * for v4 routes and the new route is a system
2992 * route we do not install anything.
2993 * The problem here is that the new system
2994 * route should cause us to withdraw from
2995 * the kernel the old non-system route
2997 if (RSYSTEM_ROUTE(dplane_ctx_get_type(ctx
))
2998 && !RSYSTEM_ROUTE(dplane_ctx_get_old_type(ctx
)))
2999 return netlink_batch_add_msg(
3000 bth
, ctx
, netlink_delroute_msg_encoder
,
3004 * So v6 route replace semantics are not in
3005 * the kernel at this point as I understand it.
3006 * so let's do a delete then an add.
3007 * In the future once v6 route replace semantics
3008 * are in we can figure out what to do here to
3009 * allow working with old and new kernels.
3011 * I'm also intentionally ignoring the failure case
3012 * of the route delete. If that happens yeah we're
3015 if (!RSYSTEM_ROUTE(dplane_ctx_get_old_type(ctx
)))
3016 netlink_batch_add_msg(
3017 bth
, ctx
, netlink_delroute_msg_encoder
,
3023 return FRR_NETLINK_ERROR
;
3025 if (RSYSTEM_ROUTE(dplane_ctx_get_type(ctx
)))
3026 return FRR_NETLINK_SUCCESS
;
3028 return netlink_batch_add_msg(bth
, ctx
,
3030 ? netlink_newroute_msg_encoder
3031 : netlink_delroute_msg_encoder
,
3036 * netlink_nexthop_process_nh() - Parse the gatway/if info from a new nexthop
3038 * @tb: Netlink RTA data
3039 * @family: Address family in the nhmsg
3040 * @ifp: Interface connected - this should be NULL, we fill it in
3041 * @ns_id: Namspace id
3043 * Return: New nexthop
3045 static struct nexthop
netlink_nexthop_process_nh(struct rtattr
**tb
,
3046 unsigned char family
,
3047 struct interface
**ifp
,
3050 struct nexthop nh
= {};
3052 enum nexthop_types_t type
= 0;
3055 struct interface
*ifp_lookup
;
3057 if_index
= *(int *)RTA_DATA(tb
[NHA_OIF
]);
3060 if (tb
[NHA_GATEWAY
]) {
3063 type
= NEXTHOP_TYPE_IPV4_IFINDEX
;
3067 type
= NEXTHOP_TYPE_IPV6_IFINDEX
;
3072 EC_ZEBRA_BAD_NHG_MESSAGE
,
3073 "Nexthop gateway with bad address family (%d) received from kernel",
3077 gate
= RTA_DATA(tb
[NHA_GATEWAY
]);
3079 type
= NEXTHOP_TYPE_IFINDEX
;
3085 memcpy(&(nh
.gate
), gate
, sz
);
3088 nh
.ifindex
= if_index
;
3091 if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id
), nh
.ifindex
);
3096 nh
.vrf_id
= ifp_lookup
->vrf
->vrf_id
;
3099 EC_ZEBRA_UNKNOWN_INTERFACE
,
3100 "%s: Unknown nexthop interface %u received, defaulting to VRF_DEFAULT",
3101 __func__
, nh
.ifindex
);
3103 nh
.vrf_id
= VRF_DEFAULT
;
3106 if (tb
[NHA_ENCAP
] && tb
[NHA_ENCAP_TYPE
]) {
3107 uint16_t encap_type
= *(uint16_t *)RTA_DATA(tb
[NHA_ENCAP_TYPE
]);
3110 mpls_label_t labels
[MPLS_MAX_LABELS
] = {0};
3112 if (encap_type
== LWTUNNEL_ENCAP_MPLS
)
3113 num_labels
= parse_encap_mpls(tb
[NHA_ENCAP
], labels
);
3116 nexthop_add_labels(&nh
, ZEBRA_LSP_STATIC
, num_labels
,
3123 static int netlink_nexthop_process_group(struct rtattr
**tb
,
3124 struct nh_grp
*z_grp
, int z_grp_size
,
3125 struct nhg_resilience
*nhgr
)
3128 /* linux/nexthop.h group struct */
3129 struct nexthop_grp
*n_grp
= NULL
;
3131 n_grp
= (struct nexthop_grp
*)RTA_DATA(tb
[NHA_GROUP
]);
3132 count
= (RTA_PAYLOAD(tb
[NHA_GROUP
]) / sizeof(*n_grp
));
3134 if (!count
|| (count
* sizeof(*n_grp
)) != RTA_PAYLOAD(tb
[NHA_GROUP
])) {
3135 flog_warn(EC_ZEBRA_BAD_NHG_MESSAGE
,
3136 "Invalid nexthop group received from the kernel");
3140 for (int i
= 0; ((i
< count
) && (i
< z_grp_size
)); i
++) {
3141 z_grp
[i
].id
= n_grp
[i
].id
;
3142 z_grp
[i
].weight
= n_grp
[i
].weight
+ 1;
3145 memset(nhgr
, 0, sizeof(*nhgr
));
3146 if (tb
[NHA_RES_GROUP
]) {
3147 struct rtattr
*tbn
[NHA_RES_GROUP_MAX
+ 1];
3149 struct rtattr
*res_group
= tb
[NHA_RES_GROUP
];
3151 netlink_parse_rtattr_nested(tbn
, NHA_RES_GROUP_MAX
, res_group
);
3153 if (tbn
[NHA_RES_GROUP_BUCKETS
]) {
3154 rta
= tbn
[NHA_RES_GROUP_BUCKETS
];
3155 nhgr
->buckets
= *(uint16_t *)RTA_DATA(rta
);
3158 if (tbn
[NHA_RES_GROUP_IDLE_TIMER
]) {
3159 rta
= tbn
[NHA_RES_GROUP_IDLE_TIMER
];
3160 nhgr
->idle_timer
= *(uint32_t *)RTA_DATA(rta
);
3163 if (tbn
[NHA_RES_GROUP_UNBALANCED_TIMER
]) {
3164 rta
= tbn
[NHA_RES_GROUP_UNBALANCED_TIMER
];
3165 nhgr
->unbalanced_timer
= *(uint32_t *)RTA_DATA(rta
);
3168 if (tbn
[NHA_RES_GROUP_UNBALANCED_TIME
]) {
3169 rta
= tbn
[NHA_RES_GROUP_UNBALANCED_TIME
];
3170 nhgr
->unbalanced_time
= *(uint64_t *)RTA_DATA(rta
);
3178 * netlink_nexthop_change() - Read in change about nexthops from the kernel
3180 * @h: Netlink message header
3181 * @ns_id: Namspace id
3182 * @startup: Are we reading under startup conditions?
3184 * Return: Result status
3186 int netlink_nexthop_change(struct nlmsghdr
*h
, ns_id_t ns_id
, int startup
)
3189 /* nexthop group id */
3191 unsigned char family
;
3193 afi_t afi
= AFI_UNSPEC
;
3194 vrf_id_t vrf_id
= VRF_DEFAULT
;
3195 struct interface
*ifp
= NULL
;
3196 struct nhmsg
*nhm
= NULL
;
3197 struct nexthop nh
= {};
3198 struct nh_grp grp
[MULTIPATH_NUM
] = {};
3199 /* Count of nexthops in group array */
3200 uint8_t grp_count
= 0;
3201 struct rtattr
*tb
[NHA_MAX
+ 1] = {};
3203 frrtrace(3, frr_zebra
, netlink_nexthop_change
, h
, ns_id
, startup
);
3205 nhm
= NLMSG_DATA(h
);
3210 if (startup
&& h
->nlmsg_type
!= RTM_NEWNEXTHOP
)
3213 len
= h
->nlmsg_len
- NLMSG_LENGTH(sizeof(struct nhmsg
));
3216 "%s: Message received from netlink is of a broken size %d %zu",
3217 __func__
, h
->nlmsg_len
,
3218 (size_t)NLMSG_LENGTH(sizeof(struct nhmsg
)));
3222 netlink_parse_rtattr_flags(tb
, NHA_MAX
, RTM_NHA(nhm
), len
,
3228 EC_ZEBRA_BAD_NHG_MESSAGE
,
3229 "Nexthop group without an ID received from the kernel");
3233 /* We use the ID key'd nhg table for kernel updates */
3234 id
= *((uint32_t *)RTA_DATA(tb
[NHA_ID
]));
3236 if (zebra_evpn_mh_is_fdb_nh(id
)) {
3237 /* If this is a L2 NH just ignore it */
3238 if (IS_ZEBRA_DEBUG_KERNEL
|| IS_ZEBRA_DEBUG_EVPN_MH_NH
) {
3239 zlog_debug("Ignore kernel update (%u) for fdb-nh 0x%x",
3245 family
= nhm
->nh_family
;
3246 afi
= family2afi(family
);
3248 type
= proto2zebra(nhm
->nh_protocol
, 0, true);
3250 if (IS_ZEBRA_DEBUG_KERNEL
)
3251 zlog_debug("%s ID (%u) %s NS %u",
3252 nl_msg_type_to_str(h
->nlmsg_type
), id
,
3253 nl_family_to_str(family
), ns_id
);
3256 if (h
->nlmsg_type
== RTM_NEWNEXTHOP
) {
3257 struct nhg_resilience nhgr
= {};
3259 if (tb
[NHA_GROUP
]) {
3261 * If this is a group message its only going to have
3262 * an array of nexthop IDs associated with it
3264 grp_count
= netlink_nexthop_process_group(
3265 tb
, grp
, array_size(grp
), &nhgr
);
3267 if (tb
[NHA_BLACKHOLE
]) {
3269 * This nexthop is just for blackhole-ing
3270 * traffic, it should not have an OIF, GATEWAY,
3273 nh
.type
= NEXTHOP_TYPE_BLACKHOLE
;
3274 nh
.bh_type
= BLACKHOLE_UNSPEC
;
3275 } else if (tb
[NHA_OIF
])
3277 * This is a true new nexthop, so we need
3278 * to parse the gateway and device info
3280 nh
= netlink_nexthop_process_nh(tb
, family
,
3285 EC_ZEBRA_BAD_NHG_MESSAGE
,
3286 "Invalid Nexthop message received from the kernel with ID (%u)",
3290 SET_FLAG(nh
.flags
, NEXTHOP_FLAG_ACTIVE
);
3291 if (nhm
->nh_flags
& RTNH_F_ONLINK
)
3292 SET_FLAG(nh
.flags
, NEXTHOP_FLAG_ONLINK
);
3296 if (zebra_nhg_kernel_find(id
, &nh
, grp
, grp_count
, vrf_id
, afi
,
3297 type
, startup
, &nhgr
))
3300 } else if (h
->nlmsg_type
== RTM_DELNEXTHOP
)
3301 zebra_nhg_kernel_del(id
, vrf_id
);
3307 * netlink_request_nexthop() - Request nextop information from the kernel
3308 * @zns: Zebra namespace
3309 * @family: AF_* netlink family
3310 * @type: RTM_* route type
3312 * Return: Result status
3314 static int netlink_request_nexthop(struct zebra_ns
*zns
, int family
, int type
)
3321 /* Form the request, specifying filter (rtattr) if needed. */
3322 memset(&req
, 0, sizeof(req
));
3323 req
.n
.nlmsg_type
= type
;
3324 req
.n
.nlmsg_flags
= NLM_F_ROOT
| NLM_F_MATCH
| NLM_F_REQUEST
;
3325 req
.n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct nhmsg
));
3326 req
.nhm
.nh_family
= family
;
3328 return netlink_request(&zns
->netlink_cmd
, &req
);
3333 * netlink_nexthop_read() - Nexthop read function using netlink interface
3335 * @zns: Zebra name space
3337 * Return: Result status
3338 * Only called at bootstrap time.
3340 int netlink_nexthop_read(struct zebra_ns
*zns
)
3343 struct zebra_dplane_info dp_info
;
3345 zebra_dplane_info_from_zns(&dp_info
, zns
, true /*is_cmd*/);
3347 /* Get nexthop objects */
3348 ret
= netlink_request_nexthop(zns
, AF_UNSPEC
, RTM_GETNEXTHOP
);
3351 ret
= netlink_parse_info(netlink_nexthop_change
, &zns
->netlink_cmd
,
3355 /* If we succesfully read in nexthop objects,
3356 * this kernel must support them.
3359 if (IS_ZEBRA_DEBUG_KERNEL
|| IS_ZEBRA_DEBUG_NHG
)
3360 zlog_debug("Nexthop objects %ssupported on this kernel",
3361 supports_nh
? "" : "not ");
3363 zebra_router_set_supports_nhgs(supports_nh
);
3369 int kernel_neigh_update(int add
, int ifindex
, void *addr
, char *lla
, int llalen
,
3370 ns_id_t ns_id
, uint8_t family
, bool permanent
)
3372 return netlink_neigh_update(add
? RTM_NEWNEIGH
: RTM_DELNEIGH
, ifindex
,
3373 addr
, lla
, llalen
, ns_id
, family
, permanent
,
3378 * netlink_neigh_update_msg_encode() - Common helper api for encoding
3379 * evpn neighbor update as netlink messages using dataplane context object.
3380 * Here, a neighbor refers to a bridge forwarding database entry for
3381 * either unicast forwarding or head-end replication or an IP neighbor
3383 * @ctx: Dataplane context
3384 * @cmd: Netlink command (RTM_NEWNEIGH or RTM_DELNEIGH)
3385 * @lla: A pointer to neighbor cache link layer address
3386 * @llalen: Length of the pointer to neighbor cache link layer
3388 * @ip: A neighbor cache n/w layer destination address
3389 * In the case of bridge FDB, this represnts the remote
3391 * @replace_obj: Whether NEW request should replace existing object or
3392 * add to the end of the list
3393 * @family: AF_* netlink family
3394 * @type: RTN_* route type
3395 * @flags: NTF_* flags
3396 * @state: NUD_* states
3397 * @data: data buffer pointer
3398 * @datalen: total amount of data buffer space
3399 * @protocol: protocol information
3401 * Return: 0 when the msg doesn't fit entirely in the buffer
3402 * otherwise the number of bytes written to buf.
3404 static ssize_t
netlink_neigh_update_msg_encode(
3405 const struct zebra_dplane_ctx
*ctx
, int cmd
, const void *lla
,
3406 int llalen
, const struct ipaddr
*ip
, bool replace_obj
, uint8_t family
,
3407 uint8_t type
, uint8_t flags
, uint16_t state
, uint32_t nhg_id
, bool nfy
,
3408 uint8_t nfy_flags
, bool ext
, uint32_t ext_flags
, void *data
,
3409 size_t datalen
, uint8_t protocol
)
3417 enum dplane_op_e op
;
3419 if (datalen
< sizeof(*req
))
3421 memset(req
, 0, sizeof(*req
));
3423 op
= dplane_ctx_get_op(ctx
);
3425 req
->n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct ndmsg
));
3426 req
->n
.nlmsg_flags
= NLM_F_REQUEST
;
3427 if (cmd
== RTM_NEWNEIGH
)
3428 req
->n
.nlmsg_flags
|=
3430 | (replace_obj
? NLM_F_REPLACE
: NLM_F_APPEND
);
3431 req
->n
.nlmsg_type
= cmd
;
3432 req
->ndm
.ndm_family
= family
;
3433 req
->ndm
.ndm_type
= type
;
3434 req
->ndm
.ndm_state
= state
;
3435 req
->ndm
.ndm_flags
= flags
;
3436 req
->ndm
.ndm_ifindex
= dplane_ctx_get_ifindex(ctx
);
3438 if (!nl_attr_put(&req
->n
, datalen
, NDA_PROTOCOL
, &protocol
,
3443 if (!nl_attr_put(&req
->n
, datalen
, NDA_LLADDR
, lla
, llalen
))
3448 struct rtattr
*nest
;
3450 nest
= nl_attr_nest(&req
->n
, datalen
,
3451 NDA_FDB_EXT_ATTRS
| NLA_F_NESTED
);
3455 if (!nl_attr_put(&req
->n
, datalen
, NFEA_ACTIVITY_NOTIFY
,
3456 &nfy_flags
, sizeof(nfy_flags
)))
3458 if (!nl_attr_put(&req
->n
, datalen
, NFEA_DONT_REFRESH
, NULL
, 0))
3461 nl_attr_nest_end(&req
->n
, nest
);
3466 if (!nl_attr_put(&req
->n
, datalen
, NDA_EXT_FLAGS
, &ext_flags
,
3472 if (!nl_attr_put32(&req
->n
, datalen
, NDA_NH_ID
, nhg_id
))
3476 IS_IPADDR_V4(ip
) ? IPV4_MAX_BYTELEN
: IPV6_MAX_BYTELEN
;
3477 if (!nl_attr_put(&req
->n
, datalen
, NDA_DST
, &ip
->ip
.addr
,
3482 if (op
== DPLANE_OP_MAC_INSTALL
|| op
== DPLANE_OP_MAC_DELETE
) {
3483 vlanid_t vid
= dplane_ctx_mac_get_vlan(ctx
);
3484 vni_t vni
= dplane_ctx_mac_get_vni(ctx
);
3487 if (!nl_attr_put16(&req
->n
, datalen
, NDA_VLAN
, vid
))
3492 if (!nl_attr_put32(&req
->n
, datalen
, NDA_SRC_VNI
, vni
))
3496 if (!nl_attr_put32(&req
->n
, datalen
, NDA_MASTER
,
3497 dplane_ctx_mac_get_br_ifindex(ctx
)))
3501 if (op
== DPLANE_OP_VTEP_ADD
|| op
== DPLANE_OP_VTEP_DELETE
) {
3502 vni_t vni
= dplane_ctx_neigh_get_vni(ctx
);
3505 if (!nl_attr_put32(&req
->n
, datalen
, NDA_SRC_VNI
, vni
))
3510 return NLMSG_ALIGN(req
->n
.nlmsg_len
);
3514 * Add remote VTEP to the flood list for this VxLAN interface (VNI). This
3515 * is done by adding an FDB entry with a MAC of 00:00:00:00:00:00.
3518 netlink_vxlan_flood_update_ctx(const struct zebra_dplane_ctx
*ctx
, int cmd
,
3519 void *buf
, size_t buflen
)
3521 struct ethaddr dst_mac
= {.octet
= {0}};
3522 int proto
= RTPROT_ZEBRA
;
3524 if (dplane_ctx_get_type(ctx
) != 0)
3525 proto
= zebra2proto(dplane_ctx_get_type(ctx
));
3527 return netlink_neigh_update_msg_encode(
3528 ctx
, cmd
, (const void *)&dst_mac
, ETH_ALEN
,
3529 dplane_ctx_neigh_get_ipaddr(ctx
), false, PF_BRIDGE
, 0, NTF_SELF
,
3530 (NUD_NOARP
| NUD_PERMANENT
), 0 /*nhg*/, false /*nfy*/,
3531 0 /*nfy_flags*/, false /*ext*/, 0 /*ext_flags*/, buf
, buflen
,
3536 #define NDA_RTA(r) \
3537 ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
3540 static int netlink_macfdb_change(struct nlmsghdr
*h
, int len
, ns_id_t ns_id
)
3543 struct interface
*ifp
;
3544 struct zebra_if
*zif
;
3545 struct rtattr
*tb
[NDA_MAX
+ 1];
3546 struct interface
*br_if
;
3549 struct in_addr vtep_ip
;
3550 int vid_present
= 0, dst_present
= 0;
3554 bool local_inactive
= false;
3555 bool dp_static
= false;
3557 uint32_t nhg_id
= 0;
3558 bool vni_mcast_grp
= false;
3560 ndm
= NLMSG_DATA(h
);
3562 /* We only process macfdb notifications if EVPN is enabled */
3563 if (!is_evpn_enabled())
3566 /* Parse attributes and extract fields of interest. Do basic
3567 * validation of the fields.
3569 netlink_parse_rtattr_flags(tb
, NDA_MAX
, NDA_RTA(ndm
), len
,
3572 if (!tb
[NDA_LLADDR
]) {
3573 if (IS_ZEBRA_DEBUG_KERNEL
)
3574 zlog_debug("%s AF_BRIDGE IF %u - no LLADDR",
3575 nl_msg_type_to_str(h
->nlmsg_type
),
3580 if (RTA_PAYLOAD(tb
[NDA_LLADDR
]) != ETH_ALEN
) {
3581 if (IS_ZEBRA_DEBUG_KERNEL
)
3583 "%s AF_BRIDGE IF %u - LLADDR is not MAC, len %lu",
3584 nl_msg_type_to_str(h
->nlmsg_type
), ndm
->ndm_ifindex
,
3585 (unsigned long)RTA_PAYLOAD(tb
[NDA_LLADDR
]));
3589 memcpy(&mac
, RTA_DATA(tb
[NDA_LLADDR
]), ETH_ALEN
);
3593 vid
= *(uint16_t *)RTA_DATA(tb
[NDA_VLAN
]);
3594 snprintf(vid_buf
, sizeof(vid_buf
), " VLAN %u", vid
);
3598 /* TODO: Only IPv4 supported now. */
3600 memcpy(&vtep_ip
.s_addr
, RTA_DATA(tb
[NDA_DST
]),
3602 snprintfrr(dst_buf
, sizeof(dst_buf
), " dst %pI4",
3605 memset(&vtep_ip
, 0, sizeof(vtep_ip
));
3608 nhg_id
= *(uint32_t *)RTA_DATA(tb
[NDA_NH_ID
]);
3610 if (ndm
->ndm_state
& NUD_STALE
)
3611 local_inactive
= true;
3613 if (tb
[NDA_FDB_EXT_ATTRS
]) {
3614 struct rtattr
*attr
= tb
[NDA_FDB_EXT_ATTRS
];
3615 struct rtattr
*nfea_tb
[NFEA_MAX
+ 1] = {0};
3617 netlink_parse_rtattr_nested(nfea_tb
, NFEA_MAX
, attr
);
3618 if (nfea_tb
[NFEA_ACTIVITY_NOTIFY
]) {
3621 nfy_flags
= *(uint8_t *)RTA_DATA(
3622 nfea_tb
[NFEA_ACTIVITY_NOTIFY
]);
3623 if (nfy_flags
& FDB_NOTIFY_BIT
)
3625 if (nfy_flags
& FDB_NOTIFY_INACTIVE_BIT
)
3626 local_inactive
= true;
3630 if (tb
[NDA_SRC_VNI
])
3631 vni
= *(vni_t
*)RTA_DATA(tb
[NDA_SRC_VNI
]);
3633 if (IS_ZEBRA_DEBUG_KERNEL
)
3635 "Rx %s AF_BRIDGE IF %u%s st 0x%x fl 0x%x MAC %pEA%s nhg %d vni %d",
3636 nl_msg_type_to_str(h
->nlmsg_type
), ndm
->ndm_ifindex
,
3637 vid_present
? vid_buf
: "", ndm
->ndm_state
,
3638 ndm
->ndm_flags
, &mac
, dst_present
? dst_buf
: "",
3641 /* The interface should exist. */
3642 ifp
= if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id
),
3644 if (!ifp
|| !ifp
->info
)
3647 /* The interface should be something we're interested in. */
3648 if (!IS_ZEBRA_IF_BRIDGE_SLAVE(ifp
))
3651 zif
= (struct zebra_if
*)ifp
->info
;
3652 if ((br_if
= zif
->brslave_info
.br_if
) == NULL
) {
3653 if (IS_ZEBRA_DEBUG_KERNEL
)
3655 "%s AF_BRIDGE IF %s(%u) brIF %u - no bridge master",
3656 nl_msg_type_to_str(h
->nlmsg_type
), ifp
->name
,
3658 zif
->brslave_info
.bridge_ifindex
);
3662 /* For per vni device, vni comes from device itself */
3663 if (IS_ZEBRA_IF_VXLAN(ifp
) && IS_ZEBRA_VXLAN_IF_VNI(zif
)) {
3664 struct zebra_vxlan_vni
*vnip
;
3666 vnip
= zebra_vxlan_if_vni_find(zif
, 0);
3670 sticky
= !!(ndm
->ndm_flags
& NTF_STICKY
);
3672 if (filter_vlan
&& vid
!= filter_vlan
) {
3673 if (IS_ZEBRA_DEBUG_KERNEL
)
3674 zlog_debug(" Filtered due to filter vlan: %d",
3680 * Check if this is a mcast group update (svd case)
3682 vni_mcast_grp
= is_mac_vni_mcast_group(&mac
, vni
, vtep_ip
);
3684 /* If add or update, do accordingly if learnt on a "local" interface; if
3685 * the notification is over VxLAN, this has to be related to
3687 * so perform an implicit delete of any local entry (if it exists).
3689 if (h
->nlmsg_type
== RTM_NEWNEIGH
) {
3690 /* Drop "permanent" entries. */
3691 if (!vni_mcast_grp
&& (ndm
->ndm_state
& NUD_PERMANENT
)) {
3692 if (IS_ZEBRA_DEBUG_KERNEL
)
3694 " Dropping entry because of NUD_PERMANENT");
3698 if (IS_ZEBRA_IF_VXLAN(ifp
)) {
3703 return zebra_vxlan_if_vni_mcast_group_add_update(
3704 ifp
, vni
, &vtep_ip
);
3706 return zebra_vxlan_dp_network_mac_add(
3707 ifp
, br_if
, &mac
, vid
, vni
, nhg_id
, sticky
,
3708 !!(ndm
->ndm_flags
& NTF_EXT_LEARNED
));
3711 return zebra_vxlan_local_mac_add_update(ifp
, br_if
, &mac
, vid
,
3712 sticky
, local_inactive
, dp_static
);
3715 /* This is a delete notification.
3716 * Ignore the notification with IP dest as it may just signify that the
3717 * MAC has moved from remote to local. The exception is the special
3718 * all-zeros MAC that represents the BUM flooding entry; we may have
3719 * to readd it. Otherwise,
3720 * 1. For a MAC over VxLan, check if it needs to be refreshed(readded)
3721 * 2. For a MAC over "local" interface, delete the mac
3722 * Note: We will get notifications from both bridge driver and VxLAN
3730 return zebra_vxlan_if_vni_mcast_group_del(ifp
, vni
,
3733 if (is_zero_mac(&mac
) && vni
)
3734 return zebra_vxlan_check_readd_vtep(ifp
, vni
, vtep_ip
);
3739 if (IS_ZEBRA_IF_VXLAN(ifp
))
3742 return zebra_vxlan_local_mac_del(ifp
, br_if
, &mac
, vid
);
3745 static int netlink_macfdb_table(struct nlmsghdr
*h
, ns_id_t ns_id
, int startup
)
3750 if (h
->nlmsg_type
!= RTM_NEWNEIGH
)
3753 /* Length validity. */
3754 len
= h
->nlmsg_len
- NLMSG_LENGTH(sizeof(struct ndmsg
));
3758 /* We are interested only in AF_BRIDGE notifications. */
3759 ndm
= NLMSG_DATA(h
);
3760 if (ndm
->ndm_family
!= AF_BRIDGE
)
3763 return netlink_macfdb_change(h
, len
, ns_id
);
3766 /* Request for MAC FDB information from the kernel */
3767 static int netlink_request_macs(struct nlsock
*netlink_cmd
, int family
,
3768 int type
, ifindex_t master_ifindex
)
3772 struct ifinfomsg ifm
;
3776 /* Form the request, specifying filter (rtattr) if needed. */
3777 memset(&req
, 0, sizeof(req
));
3778 req
.n
.nlmsg_type
= type
;
3779 req
.n
.nlmsg_flags
= NLM_F_ROOT
| NLM_F_MATCH
| NLM_F_REQUEST
;
3780 req
.n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct ifinfomsg
));
3781 req
.ifm
.ifi_family
= family
;
3783 nl_attr_put32(&req
.n
, sizeof(req
), IFLA_MASTER
, master_ifindex
);
3785 return netlink_request(netlink_cmd
, &req
);
3789 * MAC forwarding database read using netlink interface. This is invoked
3792 int netlink_macfdb_read(struct zebra_ns
*zns
)
3795 struct zebra_dplane_info dp_info
;
3797 zebra_dplane_info_from_zns(&dp_info
, zns
, true /*is_cmd*/);
3799 /* Get bridge FDB table. */
3800 ret
= netlink_request_macs(&zns
->netlink_cmd
, AF_BRIDGE
, RTM_GETNEIGH
,
3804 /* We are reading entire table. */
3806 ret
= netlink_parse_info(netlink_macfdb_table
, &zns
->netlink_cmd
,
3813 * MAC forwarding database read using netlink interface. This is for a
3814 * specific bridge and matching specific access VLAN (if VLAN-aware bridge).
3816 int netlink_macfdb_read_for_bridge(struct zebra_ns
*zns
, struct interface
*ifp
,
3817 struct interface
*br_if
, vlanid_t vid
)
3819 struct zebra_if
*br_zif
;
3820 struct zebra_dplane_info dp_info
;
3823 zebra_dplane_info_from_zns(&dp_info
, zns
, true /*is_cmd*/);
3825 /* Save VLAN we're filtering on, if needed. */
3826 br_zif
= (struct zebra_if
*)br_if
->info
;
3827 if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif
))
3830 /* Get bridge FDB table for specific bridge - we do the VLAN filtering.
3832 ret
= netlink_request_macs(&zns
->netlink_cmd
, AF_BRIDGE
, RTM_GETNEIGH
,
3836 ret
= netlink_parse_info(netlink_macfdb_table
, &zns
->netlink_cmd
,
3837 &dp_info
, 0, false);
3839 /* Reset VLAN filter. */
3845 /* Request for MAC FDB for a specific MAC address in VLAN from the kernel */
3846 static int netlink_request_specific_mac(struct zebra_ns
*zns
, int family
,
3847 int type
, struct interface
*ifp
,
3848 const struct ethaddr
*mac
, vlanid_t vid
,
3849 vni_t vni
, uint8_t flags
)
3856 struct zebra_if
*zif
;
3858 memset(&req
, 0, sizeof(req
));
3859 req
.n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct ndmsg
));
3860 req
.n
.nlmsg_type
= type
; /* RTM_GETNEIGH */
3861 req
.n
.nlmsg_flags
= NLM_F_REQUEST
;
3862 req
.ndm
.ndm_family
= family
; /* AF_BRIDGE */
3863 req
.ndm
.ndm_flags
= flags
;
3864 /* req.ndm.ndm_state = NUD_REACHABLE; */
3866 nl_attr_put(&req
.n
, sizeof(req
), NDA_LLADDR
, mac
, 6);
3868 zif
= (struct zebra_if
*)ifp
->info
;
3869 /* Is this a read on a VXLAN interface? */
3870 if (IS_ZEBRA_IF_VXLAN(ifp
)) {
3871 nl_attr_put32(&req
.n
, sizeof(req
), NDA_VNI
, vni
);
3872 /* TBD: Why is ifindex not filled in the non-vxlan case? */
3873 req
.ndm
.ndm_ifindex
= ifp
->ifindex
;
3875 if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(zif
) && vid
> 0)
3876 nl_attr_put16(&req
.n
, sizeof(req
), NDA_VLAN
, vid
);
3877 nl_attr_put32(&req
.n
, sizeof(req
), NDA_MASTER
, ifp
->ifindex
);
3880 if (IS_ZEBRA_DEBUG_KERNEL
)
3881 zlog_debug("Tx %s %s IF %s(%u) MAC %pEA vid %u vni %u",
3882 nl_msg_type_to_str(type
),
3883 nl_family_to_str(req
.ndm
.ndm_family
), ifp
->name
,
3884 ifp
->ifindex
, mac
, vid
, vni
);
3886 return netlink_request(&zns
->netlink_cmd
, &req
);
3889 int netlink_macfdb_read_specific_mac(struct zebra_ns
*zns
,
3890 struct interface
*br_if
,
3891 const struct ethaddr
*mac
, vlanid_t vid
)
3894 struct zebra_dplane_info dp_info
;
3896 zebra_dplane_info_from_zns(&dp_info
, zns
, true /*is_cmd*/);
3898 /* Get bridge FDB table for specific bridge - we do the VLAN filtering.
3900 ret
= netlink_request_specific_mac(zns
, AF_BRIDGE
, RTM_GETNEIGH
, br_if
,
3905 ret
= netlink_parse_info(netlink_macfdb_table
, &zns
->netlink_cmd
,
3911 int netlink_macfdb_read_mcast_for_vni(struct zebra_ns
*zns
,
3912 struct interface
*ifp
, vni_t vni
)
3914 struct zebra_if
*zif
;
3915 struct ethaddr mac
= {.octet
= {0}};
3916 struct zebra_dplane_info dp_info
;
3920 if (IS_ZEBRA_VXLAN_IF_VNI(zif
))
3923 zebra_dplane_info_from_zns(&dp_info
, zns
, true /*is_cmd*/);
3925 /* Get specific FDB entry for BUM handling, if any */
3926 ret
= netlink_request_specific_mac(zns
, AF_BRIDGE
, RTM_GETNEIGH
, ifp
,
3927 &mac
, 0, vni
, NTF_SELF
);
3931 ret
= netlink_parse_info(netlink_macfdb_table
, &zns
->netlink_cmd
,
3932 &dp_info
, 1, false);
3938 * Netlink-specific handler for MAC updates using dataplane context object.
3940 ssize_t
netlink_macfdb_update_ctx(struct zebra_dplane_ctx
*ctx
, void *data
,
3943 struct ipaddr vtep_ip
;
3950 uint32_t update_flags
;
3952 uint8_t nfy_flags
= 0;
3953 int proto
= RTPROT_ZEBRA
;
3955 if (dplane_ctx_get_type(ctx
) != 0)
3956 proto
= zebra2proto(dplane_ctx_get_type(ctx
));
3958 cmd
= dplane_ctx_get_op(ctx
) == DPLANE_OP_MAC_INSTALL
3959 ? RTM_NEWNEIGH
: RTM_DELNEIGH
;
3962 state
= NUD_REACHABLE
;
3964 update_flags
= dplane_ctx_mac_get_update_flags(ctx
);
3965 if (update_flags
& DPLANE_MAC_REMOTE
) {
3967 if (dplane_ctx_mac_is_sticky(ctx
)) {
3968 /* NUD_NOARP prevents the entry from expiring */
3970 /* sticky the entry from moving */
3971 flags
|= NTF_STICKY
;
3973 flags
|= NTF_EXT_LEARNED
;
3975 /* if it was static-local previously we need to clear the
3976 * notify flags on replace with remote
3978 if (update_flags
& DPLANE_MAC_WAS_STATIC
)
3982 if (update_flags
& DPLANE_MAC_SET_STATIC
) {
3983 nfy_flags
|= FDB_NOTIFY_BIT
;
3987 if (update_flags
& DPLANE_MAC_SET_INACTIVE
)
3988 nfy_flags
|= FDB_NOTIFY_INACTIVE_BIT
;
3993 nhg_id
= dplane_ctx_mac_get_nhg_id(ctx
);
3994 vtep_ip
.ipaddr_v4
= *(dplane_ctx_mac_get_vtep_ip(ctx
));
3995 SET_IPADDR_V4(&vtep_ip
);
3997 if (IS_ZEBRA_DEBUG_KERNEL
) {
3999 const struct ethaddr
*mac
= dplane_ctx_mac_get_addr(ctx
);
4001 vid
= dplane_ctx_mac_get_vlan(ctx
);
4003 snprintf(vid_buf
, sizeof(vid_buf
), " VLAN %u", vid
);
4008 "Tx %s family %s IF %s(%u)%s %sMAC %pEA dst %pIA nhg %u%s%s%s%s%s",
4009 nl_msg_type_to_str(cmd
), nl_family_to_str(AF_BRIDGE
),
4010 dplane_ctx_get_ifname(ctx
), dplane_ctx_get_ifindex(ctx
),
4011 vid_buf
, dplane_ctx_mac_is_sticky(ctx
) ? "sticky " : "",
4012 mac
, &vtep_ip
, nhg_id
,
4013 (update_flags
& DPLANE_MAC_REMOTE
) ? " rem" : "",
4014 (update_flags
& DPLANE_MAC_WAS_STATIC
) ? " clr_sync"
4016 (update_flags
& DPLANE_MAC_SET_STATIC
) ? " static" : "",
4017 (update_flags
& DPLANE_MAC_SET_INACTIVE
) ? " inactive"
4022 total
= netlink_neigh_update_msg_encode(
4023 ctx
, cmd
, (const void *)dplane_ctx_mac_get_addr(ctx
), ETH_ALEN
,
4024 &vtep_ip
, true, AF_BRIDGE
, 0, flags
, state
, nhg_id
, nfy
,
4025 nfy_flags
, false /*ext*/, 0 /*ext_flags*/, data
, datalen
,
4032 * In the event the kernel deletes ipv4 link-local neighbor entries created for
4033 * 5549 support, re-install them.
4035 static void netlink_handle_5549(struct ndmsg
*ndm
, struct zebra_if
*zif
,
4036 struct interface
*ifp
, struct ipaddr
*ip
,
4039 if (ndm
->ndm_family
!= AF_INET
)
4042 if (!zif
->v6_2_v4_ll_neigh_entry
)
4045 if (ipv4_ll
.s_addr
!= ip
->ip
._v4_addr
.s_addr
)
4048 if (handle_failed
&& ndm
->ndm_state
& NUD_FAILED
) {
4049 zlog_info("Neighbor Entry for %s has entered a failed state, not reinstalling",
4054 if_nbr_ipv6ll_to_ipv4ll_neigh_update(ifp
, &zif
->v6_2_v4_ll_addr6
, true);
4058 (NUD_PERMANENT | NUD_NOARP | NUD_REACHABLE | NUD_PROBE | NUD_STALE \
4060 #define NUD_LOCAL_ACTIVE \
4061 (NUD_PERMANENT | NUD_NOARP | NUD_REACHABLE)
4063 static int netlink_nbr_entry_state_to_zclient(int nbr_state
)
4065 /* an exact match is done between
4066 * - netlink neighbor state values: NDM_XXX (see in linux/neighbour.h)
4067 * - zclient neighbor state values: ZEBRA_NEIGH_STATE_XXX
4068 * (see in lib/zclient.h)
4072 static int netlink_ipneigh_change(struct nlmsghdr
*h
, int len
, ns_id_t ns_id
)
4075 struct interface
*ifp
;
4076 struct zebra_if
*zif
;
4077 struct rtattr
*tb
[NDA_MAX
+ 1];
4078 struct interface
*link_if
;
4081 char buf
[ETHER_ADDR_STRLEN
];
4082 int mac_present
= 0;
4085 bool local_inactive
;
4086 uint32_t ext_flags
= 0;
4087 bool dp_static
= false;
4091 ndm
= NLMSG_DATA(h
);
4093 /* The interface should exist. */
4094 ifp
= if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id
),
4096 if (!ifp
|| !ifp
->info
)
4099 zif
= (struct zebra_if
*)ifp
->info
;
4101 /* Parse attributes and extract fields of interest. */
4102 netlink_parse_rtattr(tb
, NDA_MAX
, NDA_RTA(ndm
), len
);
4105 zlog_debug("%s family %s IF %s(%u) vrf %s(%u) - no DST",
4106 nl_msg_type_to_str(h
->nlmsg_type
),
4107 nl_family_to_str(ndm
->ndm_family
), ifp
->name
,
4108 ndm
->ndm_ifindex
, ifp
->vrf
->name
, ifp
->vrf
->vrf_id
);
4112 memset(&ip
, 0, sizeof(ip
));
4113 ip
.ipa_type
= (ndm
->ndm_family
== AF_INET
) ? IPADDR_V4
: IPADDR_V6
;
4114 memcpy(&ip
.ip
.addr
, RTA_DATA(tb
[NDA_DST
]), RTA_PAYLOAD(tb
[NDA_DST
]));
4116 /* if kernel deletes our rfc5549 neighbor entry, re-install it */
4117 if (h
->nlmsg_type
== RTM_DELNEIGH
&& (ndm
->ndm_state
& NUD_PERMANENT
)) {
4118 netlink_handle_5549(ndm
, zif
, ifp
, &ip
, false);
4119 if (IS_ZEBRA_DEBUG_KERNEL
)
4121 " Neighbor Entry Received is a 5549 entry, finished");
4125 /* if kernel marks our rfc5549 neighbor entry invalid, re-install it */
4126 if (h
->nlmsg_type
== RTM_NEWNEIGH
&& !(ndm
->ndm_state
& NUD_VALID
))
4127 netlink_handle_5549(ndm
, zif
, ifp
, &ip
, true);
4129 /* we send link layer information to client:
4130 * - nlmsg_type = RTM_DELNEIGH|NEWNEIGH|GETNEIGH
4131 * - struct ipaddr ( for DEL and GET)
4132 * - struct ethaddr mac; (for NEW)
4134 if (h
->nlmsg_type
== RTM_NEWNEIGH
)
4135 cmd
= ZEBRA_NHRP_NEIGH_ADDED
;
4136 else if (h
->nlmsg_type
== RTM_GETNEIGH
)
4137 cmd
= ZEBRA_NHRP_NEIGH_GET
;
4138 else if (h
->nlmsg_type
== RTM_DELNEIGH
)
4139 cmd
= ZEBRA_NHRP_NEIGH_REMOVED
;
4141 zlog_debug("%s(): unknown nlmsg type %u", __func__
,
4145 if (tb
[NDA_LLADDR
]) {
4146 /* copy LLADDR information */
4147 l2_len
= RTA_PAYLOAD(tb
[NDA_LLADDR
]);
4149 if (l2_len
== IPV4_MAX_BYTELEN
|| l2_len
== 0) {
4150 union sockunion link_layer_ipv4
;
4153 sockunion_family(&link_layer_ipv4
) = AF_INET
;
4154 memcpy((void *)sockunion_get_addr(&link_layer_ipv4
),
4155 RTA_DATA(tb
[NDA_LLADDR
]), l2_len
);
4157 sockunion_family(&link_layer_ipv4
) = AF_UNSPEC
;
4158 zsend_nhrp_neighbor_notify(
4160 netlink_nbr_entry_state_to_zclient(ndm
->ndm_state
),
4164 if (h
->nlmsg_type
== RTM_GETNEIGH
)
4167 /* The neighbor is present on an SVI. From this, we locate the
4169 * bridge because we're only interested in neighbors on a VxLAN bridge.
4170 * The bridge is located based on the nature of the SVI:
4171 * (a) In the case of a VLAN-aware bridge, the SVI is a L3 VLAN
4173 * and is linked to the bridge
4174 * (b) In the case of a VLAN-unaware bridge, the SVI is the bridge
4178 if (IS_ZEBRA_IF_VLAN(ifp
)) {
4179 link_if
= if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id
),
4183 } else if (IS_ZEBRA_IF_BRIDGE(ifp
))
4187 if (IS_ZEBRA_DEBUG_KERNEL
)
4189 " Neighbor Entry received is not on a VLAN or a BRIDGE, ignoring");
4192 memset(&mac
, 0, sizeof(mac
));
4193 if (h
->nlmsg_type
== RTM_NEWNEIGH
) {
4194 if (tb
[NDA_LLADDR
]) {
4195 if (RTA_PAYLOAD(tb
[NDA_LLADDR
]) != ETH_ALEN
) {
4196 if (IS_ZEBRA_DEBUG_KERNEL
)
4198 "%s family %s IF %s(%u) vrf %s(%u) - LLADDR is not MAC, len %lu",
4203 ifp
->name
, ndm
->ndm_ifindex
,
4206 (unsigned long)RTA_PAYLOAD(
4212 memcpy(&mac
, RTA_DATA(tb
[NDA_LLADDR
]), ETH_ALEN
);
4215 is_ext
= !!(ndm
->ndm_flags
& NTF_EXT_LEARNED
);
4216 is_router
= !!(ndm
->ndm_flags
& NTF_ROUTER
);
4218 if (tb
[NDA_EXT_FLAGS
]) {
4219 ext_flags
= *(uint32_t *)RTA_DATA(tb
[NDA_EXT_FLAGS
]);
4220 if (ext_flags
& NTF_E_MH_PEER_SYNC
)
4224 if (IS_ZEBRA_DEBUG_KERNEL
)
4226 "Rx %s family %s IF %s(%u) vrf %s(%u) IP %pIA MAC %s state 0x%x flags 0x%x ext_flags 0x%x",
4227 nl_msg_type_to_str(h
->nlmsg_type
),
4228 nl_family_to_str(ndm
->ndm_family
), ifp
->name
,
4229 ndm
->ndm_ifindex
, ifp
->vrf
->name
,
4230 ifp
->vrf
->vrf_id
, &ip
,
4232 ? prefix_mac2str(&mac
, buf
, sizeof(buf
))
4234 ndm
->ndm_state
, ndm
->ndm_flags
, ext_flags
);
4236 /* If the neighbor state is valid for use, process as an add or
4238 * else process as a delete. Note that the delete handling may
4240 * in re-adding the neighbor if it is a valid "remote" neighbor.
4242 if (ndm
->ndm_state
& NUD_VALID
) {
4243 if (zebra_evpn_mh_do_adv_reachable_neigh_only())
4245 !(ndm
->ndm_state
& NUD_LOCAL_ACTIVE
);
4247 /* If EVPN-MH is not enabled we treat STALE
4248 * neighbors as locally-active and advertise
4251 local_inactive
= false;
4253 /* Add local neighbors to the l3 interface database */
4255 zebra_neigh_del(ifp
, &ip
);
4257 zebra_neigh_add(ifp
, &ip
, &mac
);
4260 zebra_vxlan_handle_kernel_neigh_update(
4261 ifp
, link_if
, &ip
, &mac
, ndm
->ndm_state
,
4262 is_ext
, is_router
, local_inactive
,
4268 zebra_neigh_del(ifp
, &ip
);
4270 zebra_vxlan_handle_kernel_neigh_del(ifp
, link_if
, &ip
);
4274 if (IS_ZEBRA_DEBUG_KERNEL
)
4275 zlog_debug("Rx %s family %s IF %s(%u) vrf %s(%u) IP %pIA",
4276 nl_msg_type_to_str(h
->nlmsg_type
),
4277 nl_family_to_str(ndm
->ndm_family
), ifp
->name
,
4278 ndm
->ndm_ifindex
, ifp
->vrf
->name
, ifp
->vrf
->vrf_id
,
4281 /* Process the delete - it may result in re-adding the neighbor if it is
4282 * a valid "remote" neighbor.
4284 zebra_neigh_del(ifp
, &ip
);
4286 zebra_vxlan_handle_kernel_neigh_del(ifp
, link_if
, &ip
);
4291 static int netlink_neigh_table(struct nlmsghdr
*h
, ns_id_t ns_id
, int startup
)
4296 if (h
->nlmsg_type
!= RTM_NEWNEIGH
)
4299 /* Length validity. */
4300 len
= h
->nlmsg_len
- NLMSG_LENGTH(sizeof(struct ndmsg
));
4304 /* We are interested only in AF_INET or AF_INET6 notifications. */
4305 ndm
= NLMSG_DATA(h
);
4306 if (ndm
->ndm_family
!= AF_INET
&& ndm
->ndm_family
!= AF_INET6
)
4309 return netlink_neigh_change(h
, len
);
4312 /* Request for IP neighbor information from the kernel */
4313 static int netlink_request_neigh(struct nlsock
*netlink_cmd
, int family
,
4314 int type
, ifindex_t ifindex
)
4322 /* Form the request, specifying filter (rtattr) if needed. */
4323 memset(&req
, 0, sizeof(req
));
4324 req
.n
.nlmsg_type
= type
;
4325 req
.n
.nlmsg_flags
= NLM_F_ROOT
| NLM_F_MATCH
| NLM_F_REQUEST
;
4326 req
.n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct ndmsg
));
4327 req
.ndm
.ndm_family
= family
;
4329 nl_attr_put32(&req
.n
, sizeof(req
), NDA_IFINDEX
, ifindex
);
4331 return netlink_request(netlink_cmd
, &req
);
4335 * IP Neighbor table read using netlink interface. This is invoked
4338 int netlink_neigh_read(struct zebra_ns
*zns
)
4341 struct zebra_dplane_info dp_info
;
4343 zebra_dplane_info_from_zns(&dp_info
, zns
, true /*is_cmd*/);
4345 /* Get IP neighbor table. */
4346 ret
= netlink_request_neigh(&zns
->netlink_cmd
, AF_UNSPEC
, RTM_GETNEIGH
,
4350 ret
= netlink_parse_info(netlink_neigh_table
, &zns
->netlink_cmd
,
4357 * IP Neighbor table read using netlink interface. This is for a specific
4360 int netlink_neigh_read_for_vlan(struct zebra_ns
*zns
, struct interface
*vlan_if
)
4363 struct zebra_dplane_info dp_info
;
4365 zebra_dplane_info_from_zns(&dp_info
, zns
, true /*is_cmd*/);
4367 ret
= netlink_request_neigh(&zns
->netlink_cmd
, AF_UNSPEC
, RTM_GETNEIGH
,
4371 ret
= netlink_parse_info(netlink_neigh_table
, &zns
->netlink_cmd
,
4372 &dp_info
, 0, false);
4378 * Request for a specific IP in VLAN (SVI) device from IP Neighbor table,
4379 * read using netlink interface.
4381 static int netlink_request_specific_neigh_in_vlan(struct zebra_ns
*zns
,
4383 const struct ipaddr
*ip
,
4393 /* Form the request, specifying filter (rtattr) if needed. */
4394 memset(&req
, 0, sizeof(req
));
4395 req
.n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct ndmsg
));
4396 req
.n
.nlmsg_flags
= NLM_F_REQUEST
;
4397 req
.n
.nlmsg_type
= type
; /* RTM_GETNEIGH */
4398 req
.ndm
.ndm_ifindex
= ifindex
;
4400 if (IS_IPADDR_V4(ip
)) {
4401 ipa_len
= IPV4_MAX_BYTELEN
;
4402 req
.ndm
.ndm_family
= AF_INET
;
4405 ipa_len
= IPV6_MAX_BYTELEN
;
4406 req
.ndm
.ndm_family
= AF_INET6
;
4409 nl_attr_put(&req
.n
, sizeof(req
), NDA_DST
, &ip
->ip
.addr
, ipa_len
);
4411 if (IS_ZEBRA_DEBUG_KERNEL
)
4412 zlog_debug("%s: Tx %s family %s IF %u IP %pIA flags 0x%x",
4413 __func__
, nl_msg_type_to_str(type
),
4414 nl_family_to_str(req
.ndm
.ndm_family
), ifindex
, ip
,
4417 return netlink_request(&zns
->netlink_cmd
, &req
);
4420 int netlink_neigh_read_specific_ip(const struct ipaddr
*ip
,
4421 struct interface
*vlan_if
)
4424 struct zebra_ns
*zns
;
4425 struct zebra_vrf
*zvrf
= vlan_if
->vrf
->info
;
4426 struct zebra_dplane_info dp_info
;
4430 zebra_dplane_info_from_zns(&dp_info
, zns
, true /*is_cmd*/);
4432 if (IS_ZEBRA_DEBUG_KERNEL
)
4433 zlog_debug("%s: neigh request IF %s(%u) IP %pIA vrf %s(%u)",
4434 __func__
, vlan_if
->name
, vlan_if
->ifindex
, ip
,
4435 vlan_if
->vrf
->name
, vlan_if
->vrf
->vrf_id
);
4437 ret
= netlink_request_specific_neigh_in_vlan(zns
, RTM_GETNEIGH
, ip
,
4442 ret
= netlink_parse_info(netlink_neigh_table
, &zns
->netlink_cmd
,
4443 &dp_info
, 1, false);
4448 int netlink_neigh_change(struct nlmsghdr
*h
, ns_id_t ns_id
)
4453 if (!(h
->nlmsg_type
== RTM_NEWNEIGH
|| h
->nlmsg_type
== RTM_DELNEIGH
4454 || h
->nlmsg_type
== RTM_GETNEIGH
))
4457 /* Length validity. */
4458 len
= h
->nlmsg_len
- NLMSG_LENGTH(sizeof(struct ndmsg
));
4461 "%s: Message received from netlink is of a broken size %d %zu",
4462 __func__
, h
->nlmsg_len
,
4463 (size_t)NLMSG_LENGTH(sizeof(struct ndmsg
)));
4467 /* Is this a notification for the MAC FDB or IP neighbor table? */
4468 ndm
= NLMSG_DATA(h
);
4469 if (ndm
->ndm_family
== AF_BRIDGE
)
4470 return netlink_macfdb_change(h
, len
, ns_id
);
4472 if (ndm
->ndm_type
!= RTN_UNICAST
)
4475 if (ndm
->ndm_family
== AF_INET
|| ndm
->ndm_family
== AF_INET6
)
4476 return netlink_ipneigh_change(h
, len
, ns_id
);
4479 EC_ZEBRA_UNKNOWN_FAMILY
,
4480 "Invalid address family: %u received from kernel neighbor change: %s",
4481 ndm
->ndm_family
, nl_msg_type_to_str(h
->nlmsg_type
));
4489 * Utility neighbor-update function, using info from dplane context.
4491 static ssize_t
netlink_neigh_update_ctx(const struct zebra_dplane_ctx
*ctx
,
4492 int cmd
, void *buf
, size_t buflen
)
4494 const struct ipaddr
*ip
;
4495 const struct ethaddr
*mac
= NULL
;
4496 const struct ipaddr
*link_ip
= NULL
;
4497 const void *link_ptr
= NULL
;
4498 char buf2
[ETHER_ADDR_STRLEN
];
4504 uint32_t update_flags
;
4505 uint32_t ext_flags
= 0;
4507 int proto
= RTPROT_ZEBRA
;
4509 if (dplane_ctx_get_type(ctx
) != 0)
4510 proto
= zebra2proto(dplane_ctx_get_type(ctx
));
4512 ip
= dplane_ctx_neigh_get_ipaddr(ctx
);
4514 if (dplane_ctx_get_op(ctx
) == DPLANE_OP_NEIGH_IP_INSTALL
4515 || dplane_ctx_get_op(ctx
) == DPLANE_OP_NEIGH_IP_DELETE
) {
4516 link_ip
= dplane_ctx_neigh_get_link_ip(ctx
);
4517 llalen
= IPADDRSZ(link_ip
);
4518 link_ptr
= (const void *)&(link_ip
->ip
.addr
);
4519 ipaddr2str(link_ip
, buf2
, sizeof(buf2
));
4521 mac
= dplane_ctx_neigh_get_mac(ctx
);
4523 link_ptr
= (const void *)mac
;
4524 if (is_zero_mac(mac
))
4527 prefix_mac2str(mac
, buf2
, sizeof(buf2
));
4529 snprintf(buf2
, sizeof(buf2
), "null");
4531 update_flags
= dplane_ctx_neigh_get_update_flags(ctx
);
4532 flags
= neigh_flags_to_netlink(dplane_ctx_neigh_get_flags(ctx
));
4533 state
= neigh_state_to_netlink(dplane_ctx_neigh_get_state(ctx
));
4535 family
= IS_IPADDR_V4(ip
) ? AF_INET
: AF_INET6
;
4537 if (update_flags
& DPLANE_NEIGH_REMOTE
) {
4538 flags
|= NTF_EXT_LEARNED
;
4539 /* if it was static-local previously we need to clear the
4540 * ext flags on replace with remote
4542 if (update_flags
& DPLANE_NEIGH_WAS_STATIC
)
4544 } else if (!(update_flags
& DPLANE_NEIGH_NO_EXTENSION
)) {
4547 if (update_flags
& DPLANE_NEIGH_SET_STATIC
)
4548 ext_flags
|= NTF_E_MH_PEER_SYNC
;
4550 if (IS_ZEBRA_DEBUG_KERNEL
)
4552 "Tx %s family %s IF %s(%u) Neigh %pIA %s %s flags 0x%x state 0x%x %sext_flags 0x%x",
4553 nl_msg_type_to_str(cmd
), nl_family_to_str(family
),
4554 dplane_ctx_get_ifname(ctx
), dplane_ctx_get_ifindex(ctx
),
4555 ip
, link_ip
? "Link" : "MAC", buf2
, flags
, state
,
4556 ext
? "ext " : "", ext_flags
);
4558 return netlink_neigh_update_msg_encode(
4559 ctx
, cmd
, link_ptr
, llalen
, ip
, true, family
, RTN_UNICAST
,
4560 flags
, state
, 0 /*nhg*/, false /*nfy*/, 0 /*nfy_flags*/, ext
,
4561 ext_flags
, buf
, buflen
, proto
);
4564 static int netlink_neigh_table_update_ctx(const struct zebra_dplane_ctx
*ctx
,
4565 void *data
, size_t datalen
)
4572 struct rtattr
*nest
;
4577 if (datalen
< sizeof(*req
))
4579 memset(req
, 0, sizeof(*req
));
4580 family
= dplane_ctx_neightable_get_family(ctx
);
4581 idx
= dplane_ctx_get_ifindex(ctx
);
4583 req
->n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct ndtmsg
));
4584 req
->n
.nlmsg_flags
= NLM_F_REQUEST
| NLM_F_REPLACE
;
4585 req
->n
.nlmsg_type
= RTM_SETNEIGHTBL
;
4586 req
->ndtm
.ndtm_family
= family
;
4588 nl_attr_put(&req
->n
, datalen
, NDTA_NAME
,
4589 family
== AF_INET
? "arp_cache" : "ndisc_cache", 10);
4590 nest
= nl_attr_nest(&req
->n
, datalen
, NDTA_PARMS
);
4593 if (!nl_attr_put(&req
->n
, datalen
, NDTPA_IFINDEX
, &idx
, sizeof(idx
)))
4595 val
= dplane_ctx_neightable_get_app_probes(ctx
);
4596 if (!nl_attr_put(&req
->n
, datalen
, NDTPA_APP_PROBES
, &val
, sizeof(val
)))
4598 val
= dplane_ctx_neightable_get_mcast_probes(ctx
);
4599 if (!nl_attr_put(&req
->n
, datalen
, NDTPA_MCAST_PROBES
, &val
,
4602 val
= dplane_ctx_neightable_get_ucast_probes(ctx
);
4603 if (!nl_attr_put(&req
->n
, datalen
, NDTPA_UCAST_PROBES
, &val
,
4606 nl_attr_nest_end(&req
->n
, nest
);
4608 return NLMSG_ALIGN(req
->n
.nlmsg_len
);
4611 static ssize_t
netlink_neigh_msg_encoder(struct zebra_dplane_ctx
*ctx
,
4612 void *buf
, size_t buflen
)
4616 switch (dplane_ctx_get_op(ctx
)) {
4617 case DPLANE_OP_NEIGH_INSTALL
:
4618 case DPLANE_OP_NEIGH_UPDATE
:
4619 case DPLANE_OP_NEIGH_DISCOVER
:
4620 case DPLANE_OP_NEIGH_IP_INSTALL
:
4621 ret
= netlink_neigh_update_ctx(ctx
, RTM_NEWNEIGH
, buf
, buflen
);
4623 case DPLANE_OP_NEIGH_DELETE
:
4624 case DPLANE_OP_NEIGH_IP_DELETE
:
4625 ret
= netlink_neigh_update_ctx(ctx
, RTM_DELNEIGH
, buf
, buflen
);
4627 case DPLANE_OP_VTEP_ADD
:
4628 ret
= netlink_vxlan_flood_update_ctx(ctx
, RTM_NEWNEIGH
, buf
,
4631 case DPLANE_OP_VTEP_DELETE
:
4632 ret
= netlink_vxlan_flood_update_ctx(ctx
, RTM_DELNEIGH
, buf
,
4635 case DPLANE_OP_NEIGH_TABLE_UPDATE
:
4636 ret
= netlink_neigh_table_update_ctx(ctx
, buf
, buflen
);
4638 case DPLANE_OP_ROUTE_INSTALL
:
4639 case DPLANE_OP_ROUTE_UPDATE
:
4640 case DPLANE_OP_ROUTE_DELETE
:
4641 case DPLANE_OP_ROUTE_NOTIFY
:
4642 case DPLANE_OP_NH_INSTALL
:
4643 case DPLANE_OP_NH_UPDATE
:
4644 case DPLANE_OP_NH_DELETE
:
4645 case DPLANE_OP_LSP_INSTALL
:
4646 case DPLANE_OP_LSP_UPDATE
:
4647 case DPLANE_OP_LSP_DELETE
:
4648 case DPLANE_OP_LSP_NOTIFY
:
4649 case DPLANE_OP_PW_INSTALL
:
4650 case DPLANE_OP_PW_UNINSTALL
:
4651 case DPLANE_OP_SYS_ROUTE_ADD
:
4652 case DPLANE_OP_SYS_ROUTE_DELETE
:
4653 case DPLANE_OP_ADDR_INSTALL
:
4654 case DPLANE_OP_ADDR_UNINSTALL
:
4655 case DPLANE_OP_MAC_INSTALL
:
4656 case DPLANE_OP_MAC_DELETE
:
4657 case DPLANE_OP_RULE_ADD
:
4658 case DPLANE_OP_RULE_DELETE
:
4659 case DPLANE_OP_RULE_UPDATE
:
4660 case DPLANE_OP_BR_PORT_UPDATE
:
4661 case DPLANE_OP_IPTABLE_ADD
:
4662 case DPLANE_OP_IPTABLE_DELETE
:
4663 case DPLANE_OP_IPSET_ADD
:
4664 case DPLANE_OP_IPSET_DELETE
:
4665 case DPLANE_OP_IPSET_ENTRY_ADD
:
4666 case DPLANE_OP_IPSET_ENTRY_DELETE
:
4667 case DPLANE_OP_GRE_SET
:
4668 case DPLANE_OP_INTF_ADDR_ADD
:
4669 case DPLANE_OP_INTF_ADDR_DEL
:
4670 case DPLANE_OP_INTF_NETCONFIG
:
4671 case DPLANE_OP_INTF_INSTALL
:
4672 case DPLANE_OP_INTF_UPDATE
:
4673 case DPLANE_OP_INTF_DELETE
:
4674 case DPLANE_OP_TC_QDISC_INSTALL
:
4675 case DPLANE_OP_TC_QDISC_UNINSTALL
:
4676 case DPLANE_OP_TC_CLASS_ADD
:
4677 case DPLANE_OP_TC_CLASS_DELETE
:
4678 case DPLANE_OP_TC_CLASS_UPDATE
:
4679 case DPLANE_OP_TC_FILTER_ADD
:
4680 case DPLANE_OP_TC_FILTER_DELETE
:
4681 case DPLANE_OP_TC_FILTER_UPDATE
:
4682 case DPLANE_OP_NONE
:
4690 * Update MAC, using dataplane context object.
4693 enum netlink_msg_status
netlink_put_mac_update_msg(struct nl_batch
*bth
,
4694 struct zebra_dplane_ctx
*ctx
)
4696 return netlink_batch_add_msg(bth
, ctx
, netlink_macfdb_update_ctx
,
4700 enum netlink_msg_status
4701 netlink_put_neigh_update_msg(struct nl_batch
*bth
, struct zebra_dplane_ctx
*ctx
)
4703 return netlink_batch_add_msg(bth
, ctx
, netlink_neigh_msg_encoder
,
4708 * MPLS label forwarding table change via netlink interface, using dataplane
4709 * context information.
4711 ssize_t
netlink_mpls_multipath_msg_encode(int cmd
, struct zebra_dplane_ctx
*ctx
,
4712 void *buf
, size_t buflen
)
4715 const struct nhlfe_list_head
*head
;
4716 const struct zebra_nhlfe
*nhlfe
;
4717 struct nexthop
*nexthop
= NULL
;
4718 unsigned int nexthop_num
;
4719 const char *routedesc
;
4721 struct prefix p
= {0};
4723 kernel_netlink_nlsock_lookup(dplane_ctx_get_ns_sock(ctx
));
4731 if (buflen
< sizeof(*req
))
4734 memset(req
, 0, sizeof(*req
));
4737 * Count # nexthops so we can decide whether to use singlepath
4738 * or multipath case.
4741 head
= dplane_ctx_get_nhlfe_list(ctx
);
4742 frr_each(nhlfe_list_const
, head
, nhlfe
) {
4743 nexthop
= nhlfe
->nexthop
;
4746 if (cmd
== RTM_NEWROUTE
) {
4747 /* Count all selected NHLFEs */
4748 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
)
4749 && CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
))
4752 /* Count all installed NHLFEs */
4753 if (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_INSTALLED
)
4754 && CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
))
4759 if ((nexthop_num
== 0) ||
4760 (!dplane_ctx_get_best_nhlfe(ctx
) && (cmd
!= RTM_DELROUTE
)))
4763 req
->n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct rtmsg
));
4764 req
->n
.nlmsg_flags
= NLM_F_CREATE
| NLM_F_REQUEST
;
4765 req
->n
.nlmsg_type
= cmd
;
4766 req
->n
.nlmsg_pid
= nl
->snl
.nl_pid
;
4768 req
->r
.rtm_family
= AF_MPLS
;
4769 req
->r
.rtm_table
= RT_TABLE_MAIN
;
4770 req
->r
.rtm_dst_len
= MPLS_LABEL_LEN_BITS
;
4771 req
->r
.rtm_scope
= RT_SCOPE_UNIVERSE
;
4772 req
->r
.rtm_type
= RTN_UNICAST
;
4774 if (cmd
== RTM_NEWROUTE
) {
4775 /* We do a replace to handle update. */
4776 req
->n
.nlmsg_flags
|= NLM_F_REPLACE
;
4778 /* set the protocol value if installing */
4779 route_type
= re_type_from_lsp_type(
4780 dplane_ctx_get_best_nhlfe(ctx
)->type
);
4781 req
->r
.rtm_protocol
= zebra2proto(route_type
);
4784 /* Fill destination */
4785 lse
= mpls_lse_encode(dplane_ctx_get_in_label(ctx
), 0, 0, 1);
4786 if (!nl_attr_put(&req
->n
, buflen
, RTA_DST
, &lse
, sizeof(mpls_lse_t
)))
4789 /* Fill nexthops (paths) based on single-path or multipath. The paths
4790 * chosen depend on the operation.
4792 if (nexthop_num
== 1) {
4793 routedesc
= "single-path";
4794 _netlink_mpls_debug(cmd
, dplane_ctx_get_in_label(ctx
),
4798 frr_each(nhlfe_list_const
, head
, nhlfe
) {
4799 nexthop
= nhlfe
->nexthop
;
4803 if ((cmd
== RTM_NEWROUTE
4804 && (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
)
4805 && CHECK_FLAG(nexthop
->flags
,
4806 NEXTHOP_FLAG_ACTIVE
)))
4807 || (cmd
== RTM_DELROUTE
4808 && (CHECK_FLAG(nhlfe
->flags
,
4809 NHLFE_FLAG_INSTALLED
)
4810 && CHECK_FLAG(nexthop
->flags
,
4811 NEXTHOP_FLAG_FIB
)))) {
4812 /* Add the gateway */
4813 if (!_netlink_mpls_build_singlepath(
4814 &p
, routedesc
, nhlfe
, &req
->n
,
4815 &req
->r
, buflen
, cmd
))
4822 } else { /* Multipath case */
4823 struct rtattr
*nest
;
4824 const union g_addr
*src1
= NULL
;
4826 nest
= nl_attr_nest(&req
->n
, buflen
, RTA_MULTIPATH
);
4830 routedesc
= "multipath";
4831 _netlink_mpls_debug(cmd
, dplane_ctx_get_in_label(ctx
),
4835 frr_each(nhlfe_list_const
, head
, nhlfe
) {
4836 nexthop
= nhlfe
->nexthop
;
4840 if ((cmd
== RTM_NEWROUTE
4841 && (CHECK_FLAG(nhlfe
->flags
, NHLFE_FLAG_SELECTED
)
4842 && CHECK_FLAG(nexthop
->flags
,
4843 NEXTHOP_FLAG_ACTIVE
)))
4844 || (cmd
== RTM_DELROUTE
4845 && (CHECK_FLAG(nhlfe
->flags
,
4846 NHLFE_FLAG_INSTALLED
)
4847 && CHECK_FLAG(nexthop
->flags
,
4848 NEXTHOP_FLAG_FIB
)))) {
4851 /* Build the multipath */
4852 if (!_netlink_mpls_build_multipath(
4853 &p
, routedesc
, nhlfe
, &req
->n
,
4854 buflen
, &req
->r
, &src1
))
4859 /* Add the multipath */
4860 nl_attr_nest_end(&req
->n
, nest
);
4863 return NLMSG_ALIGN(req
->n
.nlmsg_len
);
4866 /****************************************************************************
4867 * This code was developed in a branch that didn't have dplane APIs for
4868 * MAC updates. Hence the use of the legacy style. It will be moved to
4869 * the new dplane style pre-merge to master. XXX
4871 static int netlink_fdb_nh_update(uint32_t nh_id
, struct in_addr vtep_ip
)
4878 int cmd
= RTM_NEWNEXTHOP
;
4879 struct zebra_vrf
*zvrf
;
4880 struct zebra_ns
*zns
;
4882 zvrf
= zebra_vrf_get_evpn();
4885 memset(&req
, 0, sizeof(req
));
4887 req
.n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct nhmsg
));
4888 req
.n
.nlmsg_flags
= NLM_F_REQUEST
;
4889 req
.n
.nlmsg_flags
|= (NLM_F_CREATE
| NLM_F_REPLACE
);
4890 req
.n
.nlmsg_type
= cmd
;
4891 req
.nhm
.nh_family
= AF_INET
;
4893 if (!nl_attr_put32(&req
.n
, sizeof(req
), NHA_ID
, nh_id
))
4895 if (!nl_attr_put(&req
.n
, sizeof(req
), NHA_FDB
, NULL
, 0))
4897 if (!nl_attr_put(&req
.n
, sizeof(req
), NHA_GATEWAY
,
4898 &vtep_ip
, IPV4_MAX_BYTELEN
))
4901 if (IS_ZEBRA_DEBUG_KERNEL
|| IS_ZEBRA_DEBUG_EVPN_MH_NH
) {
4902 zlog_debug("Tx %s fdb-nh 0x%x %pI4",
4903 nl_msg_type_to_str(cmd
), nh_id
, &vtep_ip
);
4906 return netlink_talk(netlink_talk_filter
, &req
.n
, &zns
->netlink_cmd
, zns
,
4910 static int netlink_fdb_nh_del(uint32_t nh_id
)
4917 int cmd
= RTM_DELNEXTHOP
;
4918 struct zebra_vrf
*zvrf
;
4919 struct zebra_ns
*zns
;
4921 zvrf
= zebra_vrf_get_evpn();
4924 memset(&req
, 0, sizeof(req
));
4926 req
.n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct nhmsg
));
4927 req
.n
.nlmsg_flags
= NLM_F_REQUEST
;
4928 req
.n
.nlmsg_type
= cmd
;
4929 req
.nhm
.nh_family
= AF_UNSPEC
;
4931 if (!nl_attr_put32(&req
.n
, sizeof(req
), NHA_ID
, nh_id
))
4934 if (IS_ZEBRA_DEBUG_KERNEL
|| IS_ZEBRA_DEBUG_EVPN_MH_NH
) {
4935 zlog_debug("Tx %s fdb-nh 0x%x",
4936 nl_msg_type_to_str(cmd
), nh_id
);
4939 return netlink_talk(netlink_talk_filter
, &req
.n
, &zns
->netlink_cmd
, zns
,
4943 static int netlink_fdb_nhg_update(uint32_t nhg_id
, uint32_t nh_cnt
,
4944 struct nh_grp
*nh_ids
)
4951 int cmd
= RTM_NEWNEXTHOP
;
4952 struct zebra_vrf
*zvrf
;
4953 struct zebra_ns
*zns
;
4954 struct nexthop_grp grp
[nh_cnt
];
4957 zvrf
= zebra_vrf_get_evpn();
4960 memset(&req
, 0, sizeof(req
));
4962 req
.n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct nhmsg
));
4963 req
.n
.nlmsg_flags
= NLM_F_REQUEST
;
4964 req
.n
.nlmsg_flags
|= (NLM_F_CREATE
| NLM_F_REPLACE
);
4965 req
.n
.nlmsg_type
= cmd
;
4966 req
.nhm
.nh_family
= AF_UNSPEC
;
4968 if (!nl_attr_put32(&req
.n
, sizeof(req
), NHA_ID
, nhg_id
))
4970 if (!nl_attr_put(&req
.n
, sizeof(req
), NHA_FDB
, NULL
, 0))
4972 memset(&grp
, 0, sizeof(grp
));
4973 for (i
= 0; i
< nh_cnt
; ++i
) {
4974 grp
[i
].id
= nh_ids
[i
].id
;
4975 grp
[i
].weight
= nh_ids
[i
].weight
;
4977 if (!nl_attr_put(&req
.n
, sizeof(req
), NHA_GROUP
,
4978 grp
, nh_cnt
* sizeof(struct nexthop_grp
)))
4982 if (IS_ZEBRA_DEBUG_KERNEL
|| IS_ZEBRA_DEBUG_EVPN_MH_NH
) {
4983 char vtep_str
[ES_VTEP_LIST_STR_SZ
];
4987 for (i
= 0; i
< nh_cnt
; ++i
) {
4988 snprintf(nh_buf
, sizeof(nh_buf
), "%u ",
4990 strlcat(vtep_str
, nh_buf
, sizeof(vtep_str
));
4993 zlog_debug("Tx %s fdb-nhg 0x%x %s",
4994 nl_msg_type_to_str(cmd
), nhg_id
, vtep_str
);
4997 return netlink_talk(netlink_talk_filter
, &req
.n
, &zns
->netlink_cmd
, zns
,
5001 static int netlink_fdb_nhg_del(uint32_t nhg_id
)
5003 return netlink_fdb_nh_del(nhg_id
);
5006 int kernel_upd_mac_nh(uint32_t nh_id
, struct in_addr vtep_ip
)
5008 return netlink_fdb_nh_update(nh_id
, vtep_ip
);
5011 int kernel_del_mac_nh(uint32_t nh_id
)
5013 return netlink_fdb_nh_del(nh_id
);
5016 int kernel_upd_mac_nhg(uint32_t nhg_id
, uint32_t nh_cnt
,
5017 struct nh_grp
*nh_ids
)
5019 return netlink_fdb_nhg_update(nhg_id
, nh_cnt
, nh_ids
);
5022 int kernel_del_mac_nhg(uint32_t nhg_id
)
5024 return netlink_fdb_nhg_del(nhg_id
);
5027 #endif /* HAVE_NETLINK */