2 * Copyright (C) 2017 Hans Dedecker <dedeckeh@gmail.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License v2 as published by
6 * the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
19 #include <linux/netlink.h>
20 #include <linux/if_addr.h>
21 #include <linux/neighbour.h>
22 #include <linux/rtnetlink.h>
24 #include <netlink/msg.h>
25 #include <netlink/socket.h>
26 #include <netlink/attr.h>
28 #include <arpa/inet.h>
29 #include <libubox/list.h>
34 struct odhcpd_event ev
;
39 static void handle_rtnl_event(struct odhcpd_event
*ev
);
40 static int cb_rtnl_valid(struct nl_msg
*msg
, void *arg
);
41 static void catch_rtnl_err(struct odhcpd_event
*e
, int error
);
42 static struct nl_sock
*create_socket(int protocol
);
44 static struct nl_sock
*rtnl_socket
= NULL
;
45 struct list_head netevent_handler_list
= LIST_HEAD_INIT(netevent_handler_list
);
46 static struct event_socket rtnl_event
= {
48 .uloop
= {.fd
= - 1, },
50 .handle_error
= catch_rtnl_err
,
51 .recv_msgs
= handle_rtnl_event
,
54 .sock_bufsize
= 133120,
57 int netlink_init(void)
59 rtnl_socket
= create_socket(NETLINK_ROUTE
);
61 syslog(LOG_ERR
, "Unable to open nl socket: %m");
65 rtnl_event
.sock
= create_socket(NETLINK_ROUTE
);
66 if (!rtnl_event
.sock
) {
67 syslog(LOG_ERR
, "Unable to open nl event socket: %m");
71 rtnl_event
.ev
.uloop
.fd
= nl_socket_get_fd(rtnl_event
.sock
);
73 if (nl_socket_set_buffer_size(rtnl_event
.sock
, rtnl_event
.sock_bufsize
, 0))
76 nl_socket_disable_seq_check(rtnl_event
.sock
);
78 nl_socket_modify_cb(rtnl_event
.sock
, NL_CB_VALID
, NL_CB_CUSTOM
,
81 /* Receive IPv4 address, IPv6 address, IPv6 routes and neighbor events */
82 if (nl_socket_add_memberships(rtnl_event
.sock
, RTNLGRP_IPV4_IFADDR
,
83 RTNLGRP_IPV6_IFADDR
, RTNLGRP_IPV6_ROUTE
,
84 RTNLGRP_NEIGH
, RTNLGRP_LINK
, 0))
87 odhcpd_register(&rtnl_event
.ev
);
93 nl_socket_free(rtnl_socket
);
97 if (rtnl_event
.sock
) {
98 nl_socket_free(rtnl_event
.sock
);
99 rtnl_event
.sock
= NULL
;
100 rtnl_event
.ev
.uloop
.fd
= -1;
107 int netlink_add_netevent_handler(struct netevent_handler
*handler
)
112 list_add(&handler
->head
, &netevent_handler_list
);
117 static void call_netevent_handler_list(unsigned long event
, struct netevent_handler_info
*info
)
119 struct netevent_handler
*handler
;
121 list_for_each_entry(handler
, &netevent_handler_list
, head
)
122 handler
->cb(event
, info
);
125 static void handle_rtnl_event(struct odhcpd_event
*e
)
127 struct event_socket
*ev_sock
= container_of(e
, struct event_socket
, ev
);
129 nl_recvmsgs_default(ev_sock
->sock
);
132 static void refresh_iface_addr4(int ifindex
)
134 struct odhcpd_ipaddr
*addr
= NULL
;
135 struct interface
*iface
;
136 ssize_t len
= netlink_get_interface_addrs(ifindex
, false, &addr
);
142 avl_for_each_element(&interfaces
, iface
, avl
) {
143 struct netevent_handler_info event_info
;
145 if (iface
->ifindex
!= ifindex
)
148 memset(&event_info
, 0, sizeof(event_info
));
149 event_info
.iface
= iface
;
150 event_info
.addrs_old
.addrs
= iface
->addr4
;
151 event_info
.addrs_old
.len
= iface
->addr4_len
;
154 change
= len
!= (ssize_t
)iface
->addr4_len
;
155 for (ssize_t i
= 0; !change
&& i
< len
; ++i
) {
156 if (addr
[i
].addr
.in
.s_addr
!= iface
->addr4
[i
].addr
.in
.s_addr
)
162 iface
->addr4_len
= len
;
165 call_netevent_handler_list(NETEV_ADDRLIST_CHANGE
, &event_info
);
167 free(event_info
.addrs_old
.addrs
);
172 addr
= malloc(len
* sizeof(*addr
));
176 memcpy(addr
, iface
->addr4
, len
* sizeof(*addr
));
182 static void refresh_iface_addr6(int ifindex
)
184 struct odhcpd_ipaddr
*addr
= NULL
;
185 struct interface
*iface
;
186 ssize_t len
= netlink_get_interface_addrs(ifindex
, true, &addr
);
187 time_t now
= odhcpd_time();
193 avl_for_each_element(&interfaces
, iface
, avl
) {
194 struct netevent_handler_info event_info
;
196 if (iface
->ifindex
!= ifindex
)
199 memset(&event_info
, 0, sizeof(event_info
));
200 event_info
.iface
= iface
;
201 event_info
.addrs_old
.addrs
= iface
->addr6
;
202 event_info
.addrs_old
.len
= iface
->addr6_len
;
205 change
= len
!= (ssize_t
)iface
->addr6_len
;
206 for (ssize_t i
= 0; !change
&& i
< len
; ++i
) {
207 if (!IN6_ARE_ADDR_EQUAL(&addr
[i
].addr
.in6
, &iface
->addr6
[i
].addr
.in6
) ||
208 (addr
[i
].preferred
> (uint32_t)now
) != (iface
->addr6
[i
].preferred
> (uint32_t)now
) ||
209 addr
[i
].valid
< iface
->addr6
[i
].valid
|| addr
[i
].preferred
< iface
->addr6
[i
].preferred
)
215 iface
->addr6_len
= len
;
218 call_netevent_handler_list(NETEV_ADDR6LIST_CHANGE
, &event_info
);
220 free(event_info
.addrs_old
.addrs
);
225 addr
= malloc(len
* sizeof(*addr
));
229 memcpy(addr
, iface
->addr6
, len
* sizeof(*addr
));
235 static int handle_rtm_link(struct nlmsghdr
*hdr
)
237 struct ifinfomsg
*ifi
= nlmsg_data(hdr
);
238 struct nlattr
*nla
[__IFLA_MAX
];
239 struct interface
*iface
;
240 struct netevent_handler_info event_info
;
243 memset(&event_info
, 0, sizeof(event_info
));
245 if (!nlmsg_valid_hdr(hdr
, sizeof(*ifi
)) || ifi
->ifi_family
!= AF_UNSPEC
)
248 nlmsg_parse(hdr
, sizeof(*ifi
), nla
, __IFLA_MAX
- 1, NULL
);
249 if (!nla
[IFLA_IFNAME
])
252 ifname
= nla_get_string(nla
[IFLA_IFNAME
]);
254 avl_for_each_element(&interfaces
, iface
, avl
) {
255 if (strcmp(iface
->ifname
, ifname
) || iface
->ifindex
== ifi
->ifi_index
)
258 iface
->ifindex
= ifi
->ifi_index
;
259 event_info
.iface
= iface
;
260 call_netevent_handler_list(NETEV_IFINDEX_CHANGE
, &event_info
);
266 static int handle_rtm_route(struct nlmsghdr
*hdr
, bool add
)
268 struct rtmsg
*rtm
= nlmsg_data(hdr
);
269 struct nlattr
*nla
[__RTA_MAX
];
270 struct interface
*iface
;
271 struct netevent_handler_info event_info
;
274 if (!nlmsg_valid_hdr(hdr
, sizeof(*rtm
)) || rtm
->rtm_family
!= AF_INET6
)
277 nlmsg_parse(hdr
, sizeof(*rtm
), nla
, __RTA_MAX
- 1, NULL
);
279 memset(&event_info
, 0, sizeof(event_info
));
280 event_info
.rt
.dst_len
= rtm
->rtm_dst_len
;
283 nla_memcpy(&event_info
.rt
.dst
, nla
[RTA_DST
],
284 sizeof(event_info
.rt
.dst
));
287 ifindex
= nla_get_u32(nla
[RTA_OIF
]);
289 if (nla
[RTA_GATEWAY
])
290 nla_memcpy(&event_info
.rt
.gateway
, nla
[RTA_GATEWAY
],
291 sizeof(event_info
.rt
.gateway
));
293 avl_for_each_element(&interfaces
, iface
, avl
) {
294 if (ifindex
&& iface
->ifindex
!= ifindex
)
297 event_info
.iface
= ifindex
? iface
: NULL
;
298 call_netevent_handler_list(add
? NETEV_ROUTE6_ADD
: NETEV_ROUTE6_DEL
,
305 static int handle_rtm_addr(struct nlmsghdr
*hdr
, bool add
)
307 struct ifaddrmsg
*ifa
= nlmsg_data(hdr
);
308 struct nlattr
*nla
[__IFA_MAX
];
309 struct interface
*iface
;
310 struct netevent_handler_info event_info
;
311 char buf
[INET6_ADDRSTRLEN
];
313 if (!nlmsg_valid_hdr(hdr
, sizeof(*ifa
)) ||
314 (ifa
->ifa_family
!= AF_INET6
&&
315 ifa
->ifa_family
!= AF_INET
))
318 memset(&event_info
, 0, sizeof(event_info
));
320 nlmsg_parse(hdr
, sizeof(*ifa
), nla
, __IFA_MAX
- 1, NULL
);
322 if (ifa
->ifa_family
== AF_INET6
) {
323 if (!nla
[IFA_ADDRESS
])
326 nla_memcpy(&event_info
.addr
, nla
[IFA_ADDRESS
], sizeof(event_info
.addr
));
328 if (IN6_IS_ADDR_LINKLOCAL(&event_info
.addr
) || IN6_IS_ADDR_MULTICAST(&event_info
.addr
))
331 inet_ntop(AF_INET6
, &event_info
.addr
, buf
, sizeof(buf
));
333 avl_for_each_element(&interfaces
, iface
, avl
) {
334 if (iface
->ifindex
!= (int)ifa
->ifa_index
)
337 syslog(LOG_DEBUG
, "Netlink %s %s on %s", add
? "newaddr" : "deladdr",
340 event_info
.iface
= iface
;
341 call_netevent_handler_list(add
? NETEV_ADDR6_ADD
: NETEV_ADDR6_DEL
,
345 refresh_iface_addr6(ifa
->ifa_index
);
350 nla_memcpy(&event_info
.addr
, nla
[IFA_LOCAL
], sizeof(event_info
.addr
));
352 inet_ntop(AF_INET
, &event_info
.addr
, buf
, sizeof(buf
));
354 avl_for_each_element(&interfaces
, iface
, avl
) {
355 if (iface
->ifindex
!= (int)ifa
->ifa_index
)
358 syslog(LOG_DEBUG
, "Netlink %s %s on %s", add
? "newaddr" : "deladdr",
361 event_info
.iface
= iface
;
362 call_netevent_handler_list(add
? NETEV_ADDR_ADD
: NETEV_ADDR_DEL
,
366 refresh_iface_addr4(ifa
->ifa_index
);
372 static int handle_rtm_neigh(struct nlmsghdr
*hdr
, bool add
)
374 struct ndmsg
*ndm
= nlmsg_data(hdr
);
375 struct nlattr
*nla
[__NDA_MAX
];
376 struct interface
*iface
;
377 struct netevent_handler_info event_info
;
378 char buf
[INET6_ADDRSTRLEN
];
380 if (!nlmsg_valid_hdr(hdr
, sizeof(*ndm
)) ||
381 ndm
->ndm_family
!= AF_INET6
)
384 nlmsg_parse(hdr
, sizeof(*ndm
), nla
, __NDA_MAX
- 1, NULL
);
388 memset(&event_info
, 0, sizeof(event_info
));
390 nla_memcpy(&event_info
.neigh
.dst
, nla
[NDA_DST
], sizeof(event_info
.neigh
.dst
));
392 if (IN6_IS_ADDR_LINKLOCAL(&event_info
.neigh
.dst
) ||
393 IN6_IS_ADDR_MULTICAST(&event_info
.neigh
.dst
))
396 inet_ntop(AF_INET6
, &event_info
.neigh
.dst
, buf
, sizeof(buf
));
398 avl_for_each_element(&interfaces
, iface
, avl
) {
399 if (iface
->ifindex
!= ndm
->ndm_ifindex
)
402 syslog(LOG_DEBUG
, "Netlink %s %s on %s", true ? "newneigh" : "delneigh",
405 event_info
.iface
= iface
;
406 event_info
.neigh
.state
= ndm
->ndm_state
;
407 event_info
.neigh
.flags
= ndm
->ndm_flags
;
409 call_netevent_handler_list(add
? NETEV_NEIGH6_ADD
: NETEV_NEIGH6_DEL
,
416 /* Handler for neighbor cache entries from the kernel. This is our source
417 * to learn and unlearn hosts on interfaces. */
418 static int cb_rtnl_valid(struct nl_msg
*msg
, _unused
void *arg
)
420 struct nlmsghdr
*hdr
= nlmsg_hdr(msg
);
424 switch (hdr
->nlmsg_type
) {
426 ret
= handle_rtm_link(hdr
);
433 ret
= handle_rtm_route(hdr
, add
);
440 ret
= handle_rtm_addr(hdr
, add
);
447 ret
= handle_rtm_neigh(hdr
, add
);
457 static void catch_rtnl_err(struct odhcpd_event
*e
, int error
)
459 struct event_socket
*ev_sock
= container_of(e
, struct event_socket
, ev
);
461 if (error
!= ENOBUFS
)
464 /* Double netlink event buffer size */
465 ev_sock
->sock_bufsize
*= 2;
467 if (nl_socket_set_buffer_size(ev_sock
->sock
, ev_sock
->sock_bufsize
, 0))
470 netlink_dump_addr_table(true);
474 odhcpd_deregister(e
);
477 static struct nl_sock
*create_socket(int protocol
)
479 struct nl_sock
*nl_sock
;
481 nl_sock
= nl_socket_alloc();
485 if (nl_connect(nl_sock
, protocol
) < 0)
492 nl_socket_free(nl_sock
);
501 struct odhcpd_ipaddr
**addrs
;
507 static int cb_valid_handler(struct nl_msg
*msg
, void *arg
)
509 struct addr_info
*ctxt
= (struct addr_info
*)arg
;
510 struct odhcpd_ipaddr
*addrs
= *(ctxt
->addrs
);
511 struct nlmsghdr
*hdr
= nlmsg_hdr(msg
);
512 struct ifaddrmsg
*ifa
;
513 struct nlattr
*nla
[__IFA_MAX
], *nla_addr
= NULL
;
515 if (hdr
->nlmsg_type
!= RTM_NEWADDR
)
518 ifa
= NLMSG_DATA(hdr
);
519 if (ifa
->ifa_scope
!= RT_SCOPE_UNIVERSE
||
520 (ctxt
->af
!= ifa
->ifa_family
) ||
521 (ctxt
->ifindex
&& ifa
->ifa_index
!= (unsigned)ctxt
->ifindex
))
524 nlmsg_parse(hdr
, sizeof(*ifa
), nla
, __IFA_MAX
- 1, NULL
);
526 switch (ifa
->ifa_family
) {
528 if (nla
[IFA_ADDRESS
])
529 nla_addr
= nla
[IFA_ADDRESS
];
534 nla_addr
= nla
[IFA_LOCAL
];
543 addrs
= realloc(addrs
, sizeof(*addrs
)*(ctxt
->ret
+ 1));
547 memset(&addrs
[ctxt
->ret
], 0, sizeof(addrs
[ctxt
->ret
]));
548 addrs
[ctxt
->ret
].prefix
= ifa
->ifa_prefixlen
;
550 nla_memcpy(&addrs
[ctxt
->ret
].addr
, nla_addr
,
551 sizeof(addrs
[ctxt
->ret
].addr
));
553 if (nla
[IFA_BROADCAST
])
554 nla_memcpy(&addrs
[ctxt
->ret
].broadcast
, nla
[IFA_BROADCAST
],
555 sizeof(addrs
[ctxt
->ret
].broadcast
));
557 if (nla
[IFA_CACHEINFO
]) {
558 struct ifa_cacheinfo
*ifc
= nla_data(nla
[IFA_CACHEINFO
]);
560 addrs
[ctxt
->ret
].preferred
= ifc
->ifa_prefered
;
561 addrs
[ctxt
->ret
].valid
= ifc
->ifa_valid
;
564 if (ifa
->ifa_flags
& IFA_F_DEPRECATED
)
565 addrs
[ctxt
->ret
].preferred
= 0;
568 *(ctxt
->addrs
) = addrs
;
574 static int cb_finish_handler(_unused
struct nl_msg
*msg
, void *arg
)
576 struct addr_info
*ctxt
= (struct addr_info
*)arg
;
584 static int cb_error_handler(_unused
struct sockaddr_nl
*nla
, struct nlmsgerr
*err
,
587 struct addr_info
*ctxt
= (struct addr_info
*)arg
;
590 ctxt
->ret
= err
->error
;
596 static int prefix_cmp(const void *va
, const void *vb
)
598 const struct odhcpd_ipaddr
*a
= va
, *b
= vb
;
601 if (a
->prefix
== b
->prefix
) {
602 ret
= (ntohl(a
->addr
.in
.s_addr
) < ntohl(b
->addr
.in
.s_addr
)) ? 1 :
603 (ntohl(a
->addr
.in
.s_addr
) > ntohl(b
->addr
.in
.s_addr
)) ? -1 : 0;
605 ret
= a
->prefix
< b
->prefix
? 1 : -1;
611 /* compare IPv6 prefixes */
612 static int prefix6_cmp(const void *va
, const void *vb
)
614 const struct odhcpd_ipaddr
*a
= va
, *b
= vb
;
615 uint32_t a_pref
= IN6_IS_ADDR_ULA(&a
->addr
.in6
) ? 1 : a
->preferred
;
616 uint32_t b_pref
= IN6_IS_ADDR_ULA(&b
->addr
.in6
) ? 1 : b
->preferred
;
617 return (a_pref
< b_pref
) ? 1 : (a_pref
> b_pref
) ? -1 : 0;
621 /* Detect an IPV6-address currently assigned to the given interface */
622 ssize_t
netlink_get_interface_addrs(int ifindex
, bool v6
, struct odhcpd_ipaddr
**addrs
)
625 struct ifaddrmsg ifa
= {
626 .ifa_family
= v6
? AF_INET6
: AF_INET
,
630 .ifa_index
= ifindex
, };
631 struct nl_cb
*cb
= nl_cb_alloc(NL_CB_DEFAULT
);
632 struct addr_info ctxt
= {
634 .af
= v6
? AF_INET6
: AF_INET
,
645 msg
= nlmsg_alloc_simple(RTM_GETADDR
, NLM_F_REQUEST
| NLM_F_DUMP
);
652 nlmsg_append(msg
, &ifa
, sizeof(ifa
), 0);
654 nl_cb_set(cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb_valid_handler
, &ctxt
);
655 nl_cb_set(cb
, NL_CB_FINISH
, NL_CB_CUSTOM
, cb_finish_handler
, &ctxt
);
656 nl_cb_err(cb
, NL_CB_CUSTOM
, cb_error_handler
, &ctxt
);
658 nl_send_auto_complete(rtnl_socket
, msg
);
659 while (ctxt
.pending
> 0)
660 nl_recvmsgs(rtnl_socket
, cb
);
667 time_t now
= odhcpd_time();
668 struct odhcpd_ipaddr
*addr
= *addrs
;
670 qsort(addr
, ctxt
.ret
, sizeof(*addr
), v6
? prefix6_cmp
: prefix_cmp
);
672 for (ssize_t i
= 0; i
< ctxt
.ret
; ++i
) {
673 if (addr
[i
].preferred
< UINT32_MAX
- now
)
674 addr
[i
].preferred
+= now
;
676 if (addr
[i
].valid
< UINT32_MAX
- now
)
677 addr
[i
].valid
+= now
;
687 int netlink_setup_route(const struct in6_addr
*addr
, const int prefixlen
,
688 const int ifindex
, const struct in6_addr
*gw
,
689 const uint32_t metric
, const bool add
)
693 .rtm_family
= AF_INET6
,
694 .rtm_dst_len
= prefixlen
,
696 .rtm_table
= RT_TABLE_MAIN
,
697 .rtm_protocol
= (add
? RTPROT_STATIC
: RTPROT_UNSPEC
),
698 .rtm_scope
= (add
? (gw
? RT_SCOPE_UNIVERSE
: RT_SCOPE_LINK
) : RT_SCOPE_NOWHERE
),
699 .rtm_type
= (add
? RTN_UNICAST
: RTN_UNSPEC
),
703 msg
= nlmsg_alloc_simple(add
? RTM_NEWROUTE
: RTM_DELROUTE
,
704 add
? NLM_F_CREATE
| NLM_F_REPLACE
: 0);
708 nlmsg_append(msg
, &rtm
, sizeof(rtm
), 0);
710 nla_put(msg
, RTA_DST
, sizeof(*addr
), addr
);
711 nla_put_u32(msg
, RTA_OIF
, ifindex
);
712 nla_put_u32(msg
, RTA_PRIORITY
, metric
);
715 nla_put(msg
, RTA_GATEWAY
, sizeof(*gw
), gw
);
717 ret
= nl_send_auto_complete(rtnl_socket
, msg
);
723 return nl_wait_for_ack(rtnl_socket
);
727 int netlink_setup_proxy_neigh(const struct in6_addr
*addr
,
728 const int ifindex
, const bool add
)
732 .ndm_family
= AF_INET6
,
733 .ndm_flags
= NTF_PROXY
,
734 .ndm_ifindex
= ifindex
,
736 int ret
= 0, flags
= NLM_F_REQUEST
;
739 flags
|= NLM_F_REPLACE
| NLM_F_CREATE
;
741 msg
= nlmsg_alloc_simple(add
? RTM_NEWNEIGH
: RTM_DELNEIGH
, flags
);
745 nlmsg_append(msg
, &ndm
, sizeof(ndm
), 0);
747 nla_put(msg
, NDA_DST
, sizeof(*addr
), addr
);
749 ret
= nl_send_auto_complete(rtnl_socket
, msg
);
755 return nl_wait_for_ack(rtnl_socket
);
759 int netlink_setup_addr(struct odhcpd_ipaddr
*addr
,
760 const int ifindex
, const bool v6
, const bool add
)
763 struct ifaddrmsg ifa
= {
764 .ifa_family
= v6
? AF_INET6
: AF_INET
,
765 .ifa_prefixlen
= addr
->prefix
,
768 .ifa_index
= ifindex
, };
769 int ret
= 0, flags
= NLM_F_REQUEST
;
772 flags
|= NLM_F_REPLACE
| NLM_F_CREATE
;
774 msg
= nlmsg_alloc_simple(add
? RTM_NEWADDR
: RTM_DELADDR
, 0);
778 nlmsg_append(msg
, &ifa
, sizeof(ifa
), flags
);
779 nla_put(msg
, IFA_LOCAL
, v6
? 16 : 4, &addr
->addr
);
781 struct ifa_cacheinfo cinfo
= { .ifa_prefered
= 0xffffffffU
,
782 .ifa_valid
= 0xffffffffU
,
785 time_t now
= odhcpd_time();
787 if (addr
->preferred
) {
788 int64_t preferred
= addr
->preferred
- now
;
791 else if (preferred
> UINT32_MAX
)
792 preferred
= UINT32_MAX
;
794 cinfo
.ifa_prefered
= preferred
;
798 int64_t valid
= addr
->valid
- now
;
803 else if (valid
> UINT32_MAX
)
806 cinfo
.ifa_valid
= valid
;
809 nla_put(msg
, IFA_CACHEINFO
, sizeof(cinfo
), &cinfo
);
811 nla_put_u32(msg
, IFA_FLAGS
, IFA_F_NOPREFIXROUTE
);
813 if (addr
->broadcast
.s_addr
)
814 nla_put_u32(msg
, IFA_BROADCAST
, addr
->broadcast
.s_addr
);
817 ret
= nl_send_auto_complete(rtnl_socket
, msg
);
823 return nl_wait_for_ack(rtnl_socket
);
826 void netlink_dump_neigh_table(const bool proxy
)
830 .ndm_family
= AF_INET6
,
831 .ndm_flags
= proxy
? NTF_PROXY
: 0,
834 msg
= nlmsg_alloc_simple(RTM_GETNEIGH
, NLM_F_REQUEST
| NLM_F_DUMP
);
838 nlmsg_append(msg
, &ndm
, sizeof(ndm
), 0);
840 nl_send_auto_complete(rtnl_event
.sock
, msg
);
845 void netlink_dump_addr_table(const bool v6
)
848 struct ifaddrmsg ifa
= {
849 .ifa_family
= v6
? AF_INET6
: AF_INET
,
852 msg
= nlmsg_alloc_simple(RTM_GETADDR
, NLM_F_REQUEST
| NLM_F_DUMP
);
856 nlmsg_append(msg
, &ifa
, sizeof(ifa
), 0);
858 nl_send_auto_complete(rtnl_event
.sock
, msg
);