tcp_diag.c 1.4 KB

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556
  1. /*
  2. * tcp_diag.c Module for monitoring TCP transport protocols sockets.
  3. *
  4. * Version: $Id: tcp_diag.c,v 1.1.1.1 2007/06/12 07:27:14 eyryu Exp $
  5. *
  6. * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
  7. *
  8. * This program is free software; you can redistribute it and/or
  9. * modify it under the terms of the GNU General Public License
  10. * as published by the Free Software Foundation; either version
  11. * 2 of the License, or (at your option) any later version.
  12. */
  13. #include <linux/module.h>
  14. #include <linux/inet_diag.h>
  15. #include <linux/tcp.h>
  16. #include <net/tcp.h>
  17. static void tcp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
  18. void *_info)
  19. {
  20. const struct tcp_sock *tp = tcp_sk(sk);
  21. struct tcp_info *info = _info;
  22. if (sk->sk_state == TCP_LISTEN)
  23. r->idiag_rqueue = sk->sk_ack_backlog;
  24. else
  25. r->idiag_rqueue = tp->rcv_nxt - tp->copied_seq;
  26. r->idiag_wqueue = tp->write_seq - tp->snd_una;
  27. if (info != NULL)
  28. tcp_get_info(sk, info);
  29. }
  30. static struct inet_diag_handler tcp_diag_handler = {
  31. .idiag_hashinfo = &tcp_hashinfo,
  32. .idiag_get_info = tcp_diag_get_info,
  33. .idiag_type = TCPDIAG_GETSOCK,
  34. .idiag_info_size = sizeof(struct tcp_info),
  35. };
  36. static int __init tcp_diag_init(void)
  37. {
  38. return inet_diag_register(&tcp_diag_handler);
  39. }
  40. static void __exit tcp_diag_exit(void)
  41. {
  42. inet_diag_unregister(&tcp_diag_handler);
  43. }
  44. module_init(tcp_diag_init);
  45. module_exit(tcp_diag_exit);
  46. MODULE_LICENSE("GPL");