91b8270f2a
Retrieve the socket cookie generated by sock_gen_cookie() from a sk_buff with a known socket. Generates a new cookie if one was not yet set.If the socket pointer inside sk_buff is NULL, 0 is returned. The helper function coud be useful in monitoring per socket networking traffic statistics and provide a unique socket identifier per namespace. Acked-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Chenbo Feng <fengc@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
#ifndef __SOCK_DIAG_H__
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#define __SOCK_DIAG_H__
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#include <linux/netlink.h>
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#include <linux/user_namespace.h>
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#include <net/net_namespace.h>
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#include <net/sock.h>
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#include <uapi/linux/sock_diag.h>
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struct sk_buff;
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struct nlmsghdr;
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struct sock;
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struct sock_diag_handler {
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__u8 family;
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int (*dump)(struct sk_buff *skb, struct nlmsghdr *nlh);
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int (*get_info)(struct sk_buff *skb, struct sock *sk);
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int (*destroy)(struct sk_buff *skb, struct nlmsghdr *nlh);
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};
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int sock_diag_register(const struct sock_diag_handler *h);
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void sock_diag_unregister(const struct sock_diag_handler *h);
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void sock_diag_register_inet_compat(int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh));
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void sock_diag_unregister_inet_compat(int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh));
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u64 sock_gen_cookie(struct sock *sk);
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int sock_diag_check_cookie(struct sock *sk, const __u32 *cookie);
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void sock_diag_save_cookie(struct sock *sk, __u32 *cookie);
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int sock_diag_put_meminfo(struct sock *sk, struct sk_buff *skb, int attr);
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int sock_diag_put_filterinfo(bool may_report_filterinfo, struct sock *sk,
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struct sk_buff *skb, int attrtype);
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static inline
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enum sknetlink_groups sock_diag_destroy_group(const struct sock *sk)
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{
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switch (sk->sk_family) {
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case AF_INET:
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if (sk->sk_type == SOCK_RAW)
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return SKNLGRP_NONE;
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switch (sk->sk_protocol) {
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case IPPROTO_TCP:
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return SKNLGRP_INET_TCP_DESTROY;
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case IPPROTO_UDP:
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return SKNLGRP_INET_UDP_DESTROY;
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default:
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return SKNLGRP_NONE;
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}
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case AF_INET6:
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if (sk->sk_type == SOCK_RAW)
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return SKNLGRP_NONE;
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switch (sk->sk_protocol) {
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case IPPROTO_TCP:
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return SKNLGRP_INET6_TCP_DESTROY;
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case IPPROTO_UDP:
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return SKNLGRP_INET6_UDP_DESTROY;
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default:
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return SKNLGRP_NONE;
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}
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default:
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return SKNLGRP_NONE;
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}
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}
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static inline
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bool sock_diag_has_destroy_listeners(const struct sock *sk)
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{
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const struct net *n = sock_net(sk);
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const enum sknetlink_groups group = sock_diag_destroy_group(sk);
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return group != SKNLGRP_NONE && n->diag_nlsk &&
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netlink_has_listeners(n->diag_nlsk, group);
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}
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void sock_diag_broadcast_destroy(struct sock *sk);
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int sock_diag_destroy(struct sock *sk, int err);
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#endif
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