[mirror_ubuntu-bionic-kernel.git] / include / linux / sock_diag.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __SOCK_DIAG_H__
#define __SOCK_DIAG_H__

#include <linux/netlink.h>
#include <linux/user_namespace.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <uapi/linux/sock_diag.h>

struct sk_buff;
struct nlmsghdr;
struct sock;

struct sock_diag_handler {
	__u8 family;
	int (*dump)(struct sk_buff *skb, struct nlmsghdr *nlh);
	int (*get_info)(struct sk_buff *skb, struct sock *sk);
	int (*destroy)(struct sk_buff *skb, struct nlmsghdr *nlh);
};

int sock_diag_register(const struct sock_diag_handler *h);
void sock_diag_unregister(const struct sock_diag_handler *h);

void sock_diag_register_inet_compat(int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh));
void sock_diag_unregister_inet_compat(int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh));

u64 sock_gen_cookie(struct sock *sk);
int sock_diag_check_cookie(struct sock *sk, const __u32 *cookie);
void sock_diag_save_cookie(struct sock *sk, __u32 *cookie);

int sock_diag_put_meminfo(struct sock *sk, struct sk_buff *skb, int attr);
int sock_diag_put_filterinfo(bool may_report_filterinfo, struct sock *sk,
			     struct sk_buff *skb, int attrtype);

static inline
enum sknetlink_groups sock_diag_destroy_group(const struct sock *sk)
{
	switch (sk->sk_family) {
	case AF_INET:
		if (sk->sk_type == SOCK_RAW)
			return SKNLGRP_NONE;

		switch (sk->sk_protocol) {
		case IPPROTO_TCP:
			return SKNLGRP_INET_TCP_DESTROY;
		case IPPROTO_UDP:
			return SKNLGRP_INET_UDP_DESTROY;
		default:
			return SKNLGRP_NONE;
		}
	case AF_INET6:
		if (sk->sk_type == SOCK_RAW)
			return SKNLGRP_NONE;

		switch (sk->sk_protocol) {
		case IPPROTO_TCP:
			return SKNLGRP_INET6_TCP_DESTROY;
		case IPPROTO_UDP:
			return SKNLGRP_INET6_UDP_DESTROY;
		default:
			return SKNLGRP_NONE;
		}
	default:
		return SKNLGRP_NONE;
	}
}

static inline
bool sock_diag_has_destroy_listeners(const struct sock *sk)
{
	const struct net *n = sock_net(sk);
	const enum sknetlink_groups group = sock_diag_destroy_group(sk);

	return group != SKNLGRP_NONE && n->diag_nlsk &&
		netlink_has_listeners(n->diag_nlsk, group);
}
void sock_diag_broadcast_destroy(struct sock *sk);

int sock_diag_destroy(struct sock *sk, int err);
#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
d366477a PE	2	#ifndef __SOCK_DIAG_H__
d366477a PE	3	#define __SOCK_DIAG_H__
e7c466e5	4
eb4cb008	5	#include <linux/netlink.h>
e8d9612c	6	#include <linux/user_namespace.h>
eb4cb008 CG	7	#include <net/net_namespace.h>
eb4cb008 CG	8	#include <net/sock.h>
607ca46e	9	#include <uapi/linux/sock_diag.h>
e7c466e5	10
e6fe2371 PE	11	struct sk_buff;
e6fe2371 PE	12	struct nlmsghdr;
5d2e5f27	13	struct sock;
e6fe2371	14
d366477a PE	15	struct sock_diag_handler {
	16	__u8 family;
	17	int (dump)(struct sk_buff skb, struct nlmsghdr *nlh);
eb4cb008	18	int (get_info)(struct sk_buff skb, struct sock *sk);
64be0aed	19	int (destroy)(struct sk_buff skb, struct nlmsghdr *nlh);
d366477a PE	20	};
d366477a PE	21
8dcf01fc SW	22	int sock_diag_register(const struct sock_diag_handler *h);
8dcf01fc SW	23	void sock_diag_unregister(const struct sock_diag_handler *h);
d366477a PE	24
	25	void sock_diag_register_inet_compat(int (fn)(struct sk_buff skb, struct nlmsghdr *nlh));
	26	void sock_diag_unregister_inet_compat(int (fn)(struct sk_buff skb, struct nlmsghdr *nlh));
	27
91b8270f	28	u64 sock_gen_cookie(struct sock *sk);
33cf7c90 ED	29	int sock_diag_check_cookie(struct sock sk, const __u32 cookie);
33cf7c90 ED	30	void sock_diag_save_cookie(struct sock sk, __u32 cookie);
f65c1b53	31
5d2e5f27	32	int sock_diag_put_meminfo(struct sock sk, struct sk_buff skb, int attr);
a53b72c8	33	int sock_diag_put_filterinfo(bool may_report_filterinfo, struct sock *sk,
e8d9612c	34	struct sk_buff *skb, int attrtype);
5d2e5f27	35
eb4cb008 CG	36	static inline
	37	enum sknetlink_groups sock_diag_destroy_group(const struct sock *sk)
	38	{
	39	switch (sk->sk_family) {
	40	case AF_INET:
9a0fee2b WB	41	if (sk->sk_type == SOCK_RAW)
	42	return SKNLGRP_NONE;
	43
eb4cb008 CG	44	switch (sk->sk_protocol) {
	45	case IPPROTO_TCP:
	46	return SKNLGRP_INET_TCP_DESTROY;
	47	case IPPROTO_UDP:
	48	return SKNLGRP_INET_UDP_DESTROY;
	49	default:
	50	return SKNLGRP_NONE;
	51	}
	52	case AF_INET6:
9a0fee2b WB	53	if (sk->sk_type == SOCK_RAW)
	54	return SKNLGRP_NONE;
	55
eb4cb008 CG	56	switch (sk->sk_protocol) {
	57	case IPPROTO_TCP:
	58	return SKNLGRP_INET6_TCP_DESTROY;
	59	case IPPROTO_UDP:
	60	return SKNLGRP_INET6_UDP_DESTROY;
	61	default:
	62	return SKNLGRP_NONE;
	63	}
	64	default:
	65	return SKNLGRP_NONE;
	66	}
	67	}
	68
	69	static inline
	70	bool sock_diag_has_destroy_listeners(const struct sock *sk)
	71	{
	72	const struct net *n = sock_net(sk);
	73	const enum sknetlink_groups group = sock_diag_destroy_group(sk);
	74
	75	return group != SKNLGRP_NONE && n->diag_nlsk &&
	76	netlink_has_listeners(n->diag_nlsk, group);
	77	}
	78	void sock_diag_broadcast_destroy(struct sock *sk);
	79
64be0aed	80	int sock_diag_destroy(struct sock *sk, int err);
d366477a	81	#endif