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| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|---|
| 2 | #ifndef __SOCK_DIAG_H__ |
| 3 | #define __SOCK_DIAG_H__ |
| 4 | |
| 5 | #include <linux/netlink.h> |
| 6 | #include <linux/user_namespace.h> |
| 7 | #include <net/net_namespace.h> |
| 8 | #include <net/sock.h> |
| 9 | #include <uapi/linux/sock_diag.h> |
| 10 | |
| 11 | struct sk_buff; |
| 12 | struct nlmsghdr; |
| 13 | struct sock; |
| 14 | |
| 15 | struct sock_diag_handler { |
| 16 | struct module *owner; |
| 17 | __u8 family; |
| 18 | int (*dump)(struct sk_buff *skb, struct nlmsghdr *nlh); |
| 19 | int (*get_info)(struct sk_buff *skb, struct sock *sk); |
| 20 | int (*destroy)(struct sk_buff *skb, struct nlmsghdr *nlh); |
| 21 | }; |
| 22 | |
| 23 | int sock_diag_register(const struct sock_diag_handler *h); |
| 24 | void sock_diag_unregister(const struct sock_diag_handler *h); |
| 25 | |
| 26 | struct sock_diag_inet_compat { |
| 27 | struct module *owner; |
| 28 | int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh); |
| 29 | }; |
| 30 | |
| 31 | void sock_diag_register_inet_compat(const struct sock_diag_inet_compat *ptr); |
| 32 | void sock_diag_unregister_inet_compat(const struct sock_diag_inet_compat *ptr); |
| 33 | |
| 34 | u64 __sock_gen_cookie(struct sock *sk); |
| 35 | |
| 36 | static inline u64 sock_gen_cookie(struct sock *sk) |
| 37 | { |
| 38 | u64 cookie; |
| 39 | |
| 40 | preempt_disable(); |
| 41 | cookie = __sock_gen_cookie(sk); |
| 42 | preempt_enable(); |
| 43 | |
| 44 | return cookie; |
| 45 | } |
| 46 | |
| 47 | int sock_diag_check_cookie(struct sock *sk, const __u32 *cookie); |
| 48 | void sock_diag_save_cookie(struct sock *sk, __u32 *cookie); |
| 49 | |
| 50 | int sock_diag_put_meminfo(struct sock *sk, struct sk_buff *skb, int attr); |
| 51 | int sock_diag_put_filterinfo(bool may_report_filterinfo, struct sock *sk, |
| 52 | struct sk_buff *skb, int attrtype); |
| 53 | |
| 54 | static inline |
| 55 | enum sknetlink_groups sock_diag_destroy_group(const struct sock *sk) |
| 56 | { |
| 57 | switch (sk->sk_family) { |
| 58 | case AF_INET: |
| 59 | if (sk->sk_type == SOCK_RAW) |
| 60 | return SKNLGRP_NONE; |
| 61 | |
| 62 | switch (sk->sk_protocol) { |
| 63 | case IPPROTO_TCP: |
| 64 | return SKNLGRP_INET_TCP_DESTROY; |
| 65 | case IPPROTO_UDP: |
| 66 | return SKNLGRP_INET_UDP_DESTROY; |
| 67 | default: |
| 68 | return SKNLGRP_NONE; |
| 69 | } |
| 70 | case AF_INET6: |
| 71 | if (sk->sk_type == SOCK_RAW) |
| 72 | return SKNLGRP_NONE; |
| 73 | |
| 74 | switch (sk->sk_protocol) { |
| 75 | case IPPROTO_TCP: |
| 76 | return SKNLGRP_INET6_TCP_DESTROY; |
| 77 | case IPPROTO_UDP: |
| 78 | return SKNLGRP_INET6_UDP_DESTROY; |
| 79 | default: |
| 80 | return SKNLGRP_NONE; |
| 81 | } |
| 82 | default: |
| 83 | return SKNLGRP_NONE; |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | static inline |
| 88 | bool sock_diag_has_destroy_listeners(const struct sock *sk) |
| 89 | { |
| 90 | const struct net *n = sock_net(sk); |
| 91 | const enum sknetlink_groups group = sock_diag_destroy_group(sk); |
| 92 | |
| 93 | return group != SKNLGRP_NONE && n->diag_nlsk && |
| 94 | netlink_has_listeners(n->diag_nlsk, group); |
| 95 | } |
| 96 | void sock_diag_broadcast_destroy(struct sock *sk); |
| 97 | |
| 98 | int sock_diag_destroy(struct sock *sk, int err); |
| 99 | #endif |
| 100 |
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