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 13 #include <linux/module.h> 14 #include <linux/inet_diag.h> 15 16 #include "ccid.h" 17 #include "dccp.h" 18 19 static void dccp_get_info(struct sock *sk, struct tcp_info *info) 20 { 21 struct dccp_sock *dp = dccp_sk(sk); 22 const struct inet_connection_sock *icsk = inet_csk(sk); 23 24 memset(info, 0, sizeof(*info)); 25 26 info->tcpi_state = sk->sk_state; 27 info->tcpi_retransmits = icsk->icsk_retransmits; 28 info->tcpi_probes = icsk->icsk_probes_out; 29 info->tcpi_backoff = icsk->icsk_backoff; 30 info->tcpi_pmtu = icsk->icsk_pmtu_cookie; 31 32 if (dccp_msk(sk)->dccpms_send_ack_vector) 33 info->tcpi_options |= TCPI_OPT_SACK; 34 35 ccid_hc_rx_get_info(dp->dccps_hc_rx_ccid, sk, info); 36 ccid_hc_tx_get_info(dp->dccps_hc_tx_ccid, sk, info); 37 } 38 39 static void dccp_diag_get_info(struct sock *sk, struct inet_diag_msg *r, 40 void *_info) 41 { 42 r->idiag_rqueue = r->idiag_wqueue = 0; 43 44 if (_info != NULL) 45 dccp_get_info(sk, _info); 46 } 47 48 static struct inet_diag_handler dccp_diag_handler = { 49 .idiag_hashinfo = &dccp_hashinfo, 50 .idiag_get_info = dccp_diag_get_info, 51 .idiag_type = DCCPDIAG_GETSOCK, 52 .idiag_info_size = sizeof(struct tcp_info), 53 }; 54 55 static int __init dccp_diag_init(void) 56 { 57 return inet_diag_register(&dccp_diag_handler); 58 } 59 60 static void __exit dccp_diag_fini(void) 61 { 62 inet_diag_unregister(&dccp_diag_handler); 63 } 64 65 module_init(dccp_diag_init); 66 module_exit(dccp_diag_fini); 67 68 MODULE_LICENSE("GPL"); 69 MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>"); 70 MODULE_DESCRIPTION("DCCP inet_diag handler"); 71 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_INET_DIAG, DCCPDIAG_GETSOCK); 72