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/* Declarations and definitions for kernel interaction over netlink
* Copyright (C) 2016 Cumulus Networks, Inc.
*
* This file is part of GNU Zebra.
*
* GNU Zebra is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* GNU Zebra is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _ZEBRA_KERNEL_NETLINK_H
#define _ZEBRA_KERNEL_NETLINK_H
#ifdef HAVE_NETLINK
#define NL_RCV_PKT_BUF_SIZE 32768
#define NL_PKT_BUF_SIZE 8192
extern void netlink_parse_rtattr(struct rtattr **tb, int max,
struct rtattr *rta, int len);
extern void netlink_parse_rtattr_nested(struct rtattr **tb, int max,
struct rtattr *rta);
extern int addattr_l(struct nlmsghdr *n, unsigned int maxlen, int type,
const void *data, unsigned int alen);
extern int rta_addattr_l(struct rtattr *rta, unsigned int maxlen, int type,
const void *data, unsigned int alen);
extern int addattr16(struct nlmsghdr *n, unsigned int maxlen, int type,
uint16_t data);
extern int addattr32(struct nlmsghdr *n, unsigned int maxlen, int type,
int data);
extern struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type);
extern int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest);
extern struct rtattr *rta_nest(struct rtattr *rta, int maxlen, int type);
extern int rta_nest_end(struct rtattr *rta, struct rtattr *nest);
extern const char *nl_msg_type_to_str(uint16_t msg_type);
extern const char *nl_rtproto_to_str(uint8_t rtproto);
extern const char *nl_family_to_str(uint8_t family);
extern const char *nl_rttype_to_str(uint8_t rttype);
#if defined(HANDLE_NETLINK_FUZZING)
extern bool netlink_read;
extern void netlink_read_init(const char *fname);
#endif /* HANDLE_NETLINK_FUZZING */
extern int netlink_parse_info(int (*filter)(struct nlmsghdr *, ns_id_t, int),
const struct nlsock *nl,
const struct zebra_dplane_info *dp_info,
int count, int startup);
extern int netlink_talk_filter(struct nlmsghdr *h, ns_id_t ns, int startup);
extern int netlink_talk(int (*filter)(struct nlmsghdr *, ns_id_t, int startup),
struct nlmsghdr *n, struct nlsock *nl,
struct zebra_ns *zns, int startup);
/* Version with 'info' struct only */
int netlink_talk_info(int (*filter)(struct nlmsghdr *, ns_id_t, int startup),
struct nlmsghdr *n,
const struct zebra_dplane_info *dp_info, int startup);
extern int netlink_request(struct nlsock *nl, struct nlmsghdr *n);
#endif /* HAVE_NETLINK */
#endif /* _ZEBRA_KERNEL_NETLINK_H */
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