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/* 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);
static inline u64 sock_gen_cookie(struct sock *sk)
{
u64 cookie;
preempt_disable();
cookie = __sock_gen_cookie(sk);
preempt_enable();
return cookie;
}
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