75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _AF_NETLINK_H
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#define _AF_NETLINK_H
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#include <linux/rhashtable.h>
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#include <linux/atomic.h>
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#include <linux/workqueue.h>
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#include <net/sock.h>
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/* flags */
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#define NETLINK_F_KERNEL_SOCKET 0x1
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#define NETLINK_F_RECV_PKTINFO 0x2
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#define NETLINK_F_BROADCAST_SEND_ERROR 0x4
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#define NETLINK_F_RECV_NO_ENOBUFS 0x8
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#define NETLINK_F_LISTEN_ALL_NSID 0x10
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#define NETLINK_F_CAP_ACK 0x20
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#define NETLINK_F_EXT_ACK 0x40
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#define NETLINK_F_STRICT_CHK 0x80
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#define NLGRPSZ(x) (ALIGN(x, sizeof(unsigned long) * 8) / 8)
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#define NLGRPLONGS(x) (NLGRPSZ(x)/sizeof(unsigned long))
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struct netlink_sock {
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/* struct sock has to be the first member of netlink_sock */
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struct sock sk;
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u32 portid;
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u32 dst_portid;
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u32 dst_group;
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u32 flags;
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u32 subscriptions;
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u32 ngroups;
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unsigned long *groups;
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unsigned long state;
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size_t max_recvmsg_len;
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wait_queue_head_t wait;
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bool bound;
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bool cb_running;
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int dump_done_errno;
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struct netlink_callback cb;
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struct mutex *cb_mutex;
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struct mutex cb_def_mutex;
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void (*netlink_rcv)(struct sk_buff *skb);
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int (*netlink_bind)(struct net *net, int group);
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void (*netlink_unbind)(struct net *net, int group);
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struct module *module;
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struct rhash_head node;
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struct rcu_head rcu;
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struct work_struct work;
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};
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static inline struct netlink_sock *nlk_sk(struct sock *sk)
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{
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return container_of(sk, struct netlink_sock, sk);
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}
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struct netlink_table {
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struct rhashtable hash;
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struct hlist_head mc_list;
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struct listeners __rcu *listeners;
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unsigned int flags;
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unsigned int groups;
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struct mutex *cb_mutex;
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struct module *module;
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int (*bind)(struct net *net, int group);
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void (*unbind)(struct net *net, int group);
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bool (*compare)(struct net *net, struct sock *sock);
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int registered;
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};
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extern struct netlink_table *nl_table;
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extern rwlock_t nl_table_lock;
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#endif
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