projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 17b085ea ACM |
1 | /* |
| 2 | * tcp_diag.c Module for monitoring TCP transport protocols sockets. | |
| 3 | * | |
| 17b085ea ACM |
4 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU General Public License | |
| 8 | * as published by the Free Software Foundation; either version | |
| 9 | * 2 of the License, or (at your option) any later version. | |
| 10 | */ | |
| 11 | ||
| 17b085ea ACM |
12 | #include <linux/module.h> |
| 13 | #include <linux/inet_diag.h> | |
| 14 | ||
| 15 | #include <linux/tcp.h> | |
| 16 | ||
| 17 | #include <net/tcp.h> | |
| 18 | ||
| 19 | static void tcp_diag_get_info(struct sock *sk, struct inet_diag_msg *r, | |
| 20 | void *_info) | |
| 21 | { | |
| 22 | const struct tcp_sock *tp = tcp_sk(sk); | |
| 23 | struct tcp_info *info = _info; | |
| 24 | ||
| 5ee3afba | 25 | if (sk->sk_state == TCP_LISTEN) { |
| 47da8ee6 | 26 | r->idiag_rqueue = sk->sk_ack_backlog; |
| 5ee3afba RJ |
27 | r->idiag_wqueue = sk->sk_max_ack_backlog; |
| 28 | } else { | |
| 49d09007 | 29 | r->idiag_rqueue = max_t(int, tp->rcv_nxt - tp->copied_seq, 0); |
| 5ee3afba RJ |
30 | r->idiag_wqueue = tp->write_seq - tp->snd_una; |
| 31 | } | |
| 17b085ea ACM |
32 | if (info != NULL) |
| 33 | tcp_get_info(sk, info); | |
| 34 | } | |
| 35 | ||
| 1942c518 | 36 | static void tcp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, |
| 688d1945 | 37 | struct inet_diag_req_v2 *r, struct nlattr *bc) |
| 1942c518 PE |
38 | { |
| 39 | inet_diag_dump_icsk(&tcp_hashinfo, skb, cb, r, bc); | |
| 40 | } | |
| 41 | ||
| 42 | static int tcp_diag_dump_one(struct sk_buff *in_skb, const struct nlmsghdr *nlh, | |
| 688d1945 | 43 | struct inet_diag_req_v2 *req) |
| 1942c518 PE |
44 | { |
| 45 | return inet_diag_dump_one_icsk(&tcp_hashinfo, in_skb, nlh, req); | |
| 46 | } | |
| 47 | ||
| a7a0d6a8 | 48 | static const struct inet_diag_handler tcp_diag_handler = { |
| 1942c518 PE |
49 | .dump = tcp_diag_dump, |
| 50 | .dump_one = tcp_diag_dump_one, | |
| 17b085ea | 51 | .idiag_get_info = tcp_diag_get_info, |
| f13c95f0 | 52 | .idiag_type = IPPROTO_TCP, |
| 17b085ea ACM |
53 | }; |
| 54 | ||
| 55 | static int __init tcp_diag_init(void) | |
| 56 | { | |
| 57 | return inet_diag_register(&tcp_diag_handler); | |
| 58 | } | |
| 59 | ||
| 60 | static void __exit tcp_diag_exit(void) | |
| 61 | { | |
| 62 | inet_diag_unregister(&tcp_diag_handler); | |
| 63 | } | |
| 64 | ||
| 65 | module_init(tcp_diag_init); | |
| 66 | module_exit(tcp_diag_exit); | |
| 67 | MODULE_LICENSE("GPL"); | |
| aec8dc62 | 68 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2-6 /* AF_INET - IPPROTO_TCP */); |