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1 /* Declarations and definitions for kernel interaction over netlink
2 * Copyright (C) 2016 Cumulus Networks, Inc.
4 * This file is part of GNU Zebra.
6 * GNU Zebra is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2, or (at your option) any
11 * GNU Zebra is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; see the file COPYING; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef _ZEBRA_KERNEL_NETLINK_H
22 #define _ZEBRA_KERNEL_NETLINK_H
26 #define NL_RCV_PKT_BUF_SIZE 32768
27 #define NL_PKT_BUF_SIZE 8192
29 extern void netlink_parse_rtattr(struct rtattr
**tb
, int max
,
30 struct rtattr
*rta
, int len
);
31 extern void netlink_parse_rtattr_nested(struct rtattr
**tb
, int max
,
33 extern int addattr_l(struct nlmsghdr
*n
, unsigned int maxlen
, int type
,
34 const void *data
, unsigned int alen
);
35 extern int rta_addattr_l(struct rtattr
*rta
, unsigned int maxlen
, int type
,
36 const void *data
, unsigned int alen
);
37 extern int addattr16(struct nlmsghdr
*n
, unsigned int maxlen
, int type
,
39 extern int addattr32(struct nlmsghdr
*n
, unsigned int maxlen
, int type
,
41 extern struct rtattr
*addattr_nest(struct nlmsghdr
*n
, int maxlen
, int type
);
42 extern int addattr_nest_end(struct nlmsghdr
*n
, struct rtattr
*nest
);
43 extern struct rtattr
*rta_nest(struct rtattr
*rta
, int maxlen
, int type
);
44 extern int rta_nest_end(struct rtattr
*rta
, struct rtattr
*nest
);
45 extern const char *nl_msg_type_to_str(uint16_t msg_type
);
46 extern const char *nl_rtproto_to_str(uint8_t rtproto
);
47 extern const char *nl_family_to_str(uint8_t family
);
48 extern const char *nl_rttype_to_str(uint8_t rttype
);
50 #if defined(HANDLE_NETLINK_FUZZING)
51 extern bool netlink_read
;
52 extern void netlink_read_init(const char *fname
);
53 #endif /* HANDLE_NETLINK_FUZZING */
54 extern int netlink_parse_info(int (*filter
)(struct nlmsghdr
*, ns_id_t
, int),
55 const struct nlsock
*nl
,
56 const struct zebra_dplane_info
*dp_info
,
57 int count
, int startup
);
58 extern int netlink_talk_filter(struct nlmsghdr
*h
, ns_id_t ns
, int startup
);
59 extern int netlink_talk(int (*filter
)(struct nlmsghdr
*, ns_id_t
, int startup
),
60 struct nlmsghdr
*n
, struct nlsock
*nl
,
61 struct zebra_ns
*zns
, int startup
);
62 /* Version with 'info' struct only */
63 int netlink_talk_info(int (*filter
)(struct nlmsghdr
*, ns_id_t
, int startup
),
65 const struct zebra_dplane_info
*dp_info
, int startup
);
67 extern int netlink_request(struct nlsock
*nl
, struct nlmsghdr
*n
);
69 #endif /* HAVE_NETLINK */
71 #endif /* _ZEBRA_KERNEL_NETLINK_H */