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 (dp->dccps_hc_rx_ackvec != NULL) 33 info->tcpi_options |= TCPI_OPT_SACK; 34 35 if (dp->dccps_hc_rx_ccid != NULL) 36 ccid_hc_rx_get_info(dp->dccps_hc_rx_ccid, sk, info); 37 38 if (dp->dccps_hc_tx_ccid != NULL) 39 ccid_hc_tx_get_info(dp->dccps_hc_tx_ccid, sk, info); 40 } 41 42 static void dccp_diag_get_info(struct sock *sk, struct inet_diag_msg *r, 43 void *_info) 44 { 45 r->idiag_rqueue = r->idiag_wqueue = 0; 46 47 if (_info != NULL) 48 dccp_get_info(sk, _info); 49 } 50 51 static const struct inet_diag_handler dccp_diag_handler = { 52 .idiag_hashinfo = &dccp_hashinfo, 53 .idiag_get_info = dccp_diag_get_info, 54 .idiag_type = DCCPDIAG_GETSOCK, 55 .idiag_info_size = sizeof(struct tcp_info), 56 }; 57 58 static int __init dccp_diag_init(void) 59 { 60 return inet_diag_register(&dccp_diag_handler); 61 } 62 63 static void __exit dccp_diag_fini(void) 64 { 65 inet_diag_unregister(&dccp_diag_handler); 66 } 67 68 module_init(dccp_diag_init); 69 module_exit(dccp_diag_fini); 70 71 MODULE_LICENSE("GPL"); 72 MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>"); 73 MODULE_DESCRIPTION("DCCP inet_diag handler"); 74 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_INET_DIAG, DCCPDIAG_GETSOCK); 75