1 /* 2 * net/dccp/diag.c 3 * 4 * An implementation of the DCCP protocol 5 * Arnaldo Carvalho de Melo <acme@mandriva.com> 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 12 #include <linux/config.h> 13 14 #include <linux/module.h> 15 #include <linux/inet_diag.h> 16 17 #include "ccid.h" 18 #include "dccp.h" 19 20 static void dccp_get_info(struct sock *sk, struct tcp_info *info) 21 { 22 struct dccp_sock *dp = dccp_sk(sk); 23 const struct inet_connection_sock *icsk = inet_csk(sk); 24 25 memset(info, 0, sizeof(*info)); 26 27 info->tcpi_state = sk->sk_state; 28 info->tcpi_retransmits = icsk->icsk_retransmits; 29 info->tcpi_probes = icsk->icsk_probes_out; 30 info->tcpi_backoff = icsk->icsk_backoff; 31 info->tcpi_pmtu = dp->dccps_pmtu_cookie; 32 33 if (dp->dccps_options.dccpo_send_ack_vector) 34 info->tcpi_options |= TCPI_OPT_SACK; 35 36 ccid_hc_rx_get_info(dp->dccps_hc_rx_ccid, sk, info); 37 ccid_hc_tx_get_info(dp->dccps_hc_tx_ccid, sk, info); 38 } 39 40 static void dccp_diag_get_info(struct sock *sk, struct inet_diag_msg *r, 41 void *_info) 42 { 43 r->idiag_rqueue = r->idiag_wqueue = 0; 44 45 if (_info != NULL) 46 dccp_get_info(sk, _info); 47 } 48 49 static struct inet_diag_handler dccp_diag_handler = { 50 .idiag_hashinfo = &dccp_hashinfo, 51 .idiag_get_info = dccp_diag_get_info, 52 .idiag_type = DCCPDIAG_GETSOCK, 53 .idiag_info_size = sizeof(struct tcp_info), 54 }; 55 56 static int __init dccp_diag_init(void) 57 { 58 return inet_diag_register(&dccp_diag_handler); 59 } 60 61 static void __exit dccp_diag_fini(void) 62 { 63 inet_diag_unregister(&dccp_diag_handler); 64 } 65 66 module_init(dccp_diag_init); 67 module_exit(dccp_diag_fini); 68 69 MODULE_LICENSE("GPL"); 70 MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>"); 71 MODULE_DESCRIPTION("DCCP inet_diag handler"); 72