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https://git.proxmox.com/git/mirror_frr
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137 lines
4.8 KiB
C
137 lines
4.8 KiB
C
/*
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* libnetlink.c RTnetlink service routines.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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*
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*/
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#ifdef __linux__
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#ifndef __LIBNETLINK_H__
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#define __LIBNETLINK_H__ 1
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#include <asm/types.h>
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#include <linux/netlink.h>
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#include <linux/rtnetlink.h>
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#include <linux/if_link.h>
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#include <linux/if_addr.h>
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#include <linux/neighbour.h>
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struct rtnl_handle {
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int fd;
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struct sockaddr_nl local;
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struct sockaddr_nl peer;
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__u32 seq;
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__u32 dump;
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};
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extern int rcvbuf;
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extern int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions);
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extern int rtnl_open_byproto(struct rtnl_handle *rth, unsigned subscriptions,
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int protocol);
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extern void rtnl_close(struct rtnl_handle *rth);
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extern int rtnl_wilddump_request(struct rtnl_handle *rth, int fam, int type);
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extern int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req,
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int len);
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typedef int (*rtnl_filter_t)(const struct sockaddr_nl *, struct nlmsghdr *n,
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void *);
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struct rtnl_dump_filter_arg {
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rtnl_filter_t filter;
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void *arg1;
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rtnl_filter_t junk;
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void *arg2;
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};
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extern int rtnl_dump_filter_l(struct rtnl_handle *rth,
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const struct rtnl_dump_filter_arg *arg);
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extern int rtnl_dump_filter(struct rtnl_handle *rth, rtnl_filter_t filter,
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void *arg1, rtnl_filter_t junk, void *arg2);
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extern int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer,
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unsigned groups, struct nlmsghdr *answer,
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rtnl_filter_t junk, void *jarg);
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extern int rtnl_send(struct rtnl_handle *rth, const char *buf, int);
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extern int rtnl_send_check(struct rtnl_handle *rth, const char *buf, int);
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extern int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data);
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extern int addattr_l(struct nlmsghdr *n, int maxlen, int type, const void *data,
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int alen);
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extern int addraw_l(struct nlmsghdr *n, int maxlen, const void *data, int len);
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extern struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type);
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extern int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest);
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extern struct rtattr *addattr_nest_compat(struct nlmsghdr *n, int maxlen,
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int type, const void *data, int len);
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extern int addattr_nest_compat_end(struct nlmsghdr *n, struct rtattr *nest);
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extern int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data);
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extern int rta_addattr_l(struct rtattr *rta, int maxlen, int type,
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const void *data, int alen);
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extern int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta,
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int len);
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extern int parse_rtattr_byindex(struct rtattr *tb[], int max,
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struct rtattr *rta, int len);
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extern int __parse_rtattr_nested_compat(struct rtattr *tb[], int max,
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struct rtattr *rta, int len);
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#define parse_rtattr_nested(tb, max, rta) \
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(parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta)))
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#define parse_rtattr_nested_compat(tb, max, rta, data, len) \
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({ \
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data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \
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__parse_rtattr_nested_compat(tb, max, rta, len); \
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})
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extern int rtnl_listen(struct rtnl_handle *, rtnl_filter_t handler, void *jarg);
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extern int rtnl_from_file(FILE *, rtnl_filter_t handler, void *jarg);
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#define NLMSG_TAIL(nmsg) \
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((struct rtattr *)(((uint8_t *)(nmsg)) \
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+ NLMSG_ALIGN((nmsg)->nlmsg_len)))
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#ifndef IFA_RTA
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#define IFA_RTA(r) \
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((struct rtattr *)(((char *)(r)) \
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+ NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
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#endif
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#ifndef IFA_PAYLOAD
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#define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
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#endif
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#ifndef IFLA_RTA
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#define IFLA_RTA(r) \
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((struct rtattr *)(((char *)(r)) \
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+ NLMSG_ALIGN(sizeof(struct ifinfomsg))))
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#endif
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#ifndef IFLA_PAYLOAD
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#define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifinfomsg))
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#endif
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#ifndef NDA_RTA
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#define NDA_RTA(r) \
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((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
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#endif
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#ifndef NDA_PAYLOAD
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#define NDA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndmsg))
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#endif
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#ifndef NDTA_RTA
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#define NDTA_RTA(r) \
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((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndtmsg))))
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#endif
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#ifndef NDTA_PAYLOAD
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#define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndtmsg))
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#endif
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#endif /* __LIBNETLINK_H__ */
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#endif /* __linux__ */
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