1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * net/dccp/diag.c 4 * 5 * An implementation of the DCCP protocol 6 * Arnaldo Carvalho de Melo <acme@mandriva.com> 7 */ 8 9 10 #include <linux/module.h> 11 #include <linux/inet_diag.h> 12 13 #include "ccid.h" 14 #include "dccp.h" 15 16 static void dccp_get_info(struct sock *sk, struct tcp_info *info) 17 { 18 struct dccp_sock *dp = dccp_sk(sk); 19 const struct inet_connection_sock *icsk = inet_csk(sk); 20 21 memset(info, 0, sizeof(*info)); 22 23 info->tcpi_state = sk->sk_state; 24 info->tcpi_retransmits = icsk->icsk_retransmits; 25 info->tcpi_probes = icsk->icsk_probes_out; 26 info->tcpi_backoff = icsk->icsk_backoff; 27 info->tcpi_pmtu = icsk->icsk_pmtu_cookie; 28 29 if (dp->dccps_hc_rx_ackvec != NULL) 30 info->tcpi_options |= TCPI_OPT_SACK; 31 32 if (dp->dccps_hc_rx_ccid != NULL) 33 ccid_hc_rx_get_info(dp->dccps_hc_rx_ccid, sk, info); 34 35 if (dp->dccps_hc_tx_ccid != NULL) 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 void dccp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, 49 const struct inet_diag_req_v2 *r) 50 { 51 inet_diag_dump_icsk(&dccp_hashinfo, skb, cb, r); 52 } 53 54 static int dccp_diag_dump_one(struct netlink_callback *cb, 55 const struct inet_diag_req_v2 *req) 56 { 57 return inet_diag_dump_one_icsk(&dccp_hashinfo, cb, req); 58 } 59 60 static const struct inet_diag_handler dccp_diag_handler = { 61 .dump = dccp_diag_dump, 62 .dump_one = dccp_diag_dump_one, 63 .idiag_get_info = dccp_diag_get_info, 64 .idiag_type = IPPROTO_DCCP, 65 .idiag_info_size = sizeof(struct tcp_info), 66 }; 67 68 static int __init dccp_diag_init(void) 69 { 70 return inet_diag_register(&dccp_diag_handler); 71 } 72 73 static void __exit dccp_diag_fini(void) 74 { 75 inet_diag_unregister(&dccp_diag_handler); 76 } 77 78 module_init(dccp_diag_init); 79 module_exit(dccp_diag_fini); 80 81 MODULE_LICENSE("GPL"); 82 MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>"); 83 MODULE_DESCRIPTION("DCCP inet_diag handler"); 84 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2-33 /* AF_INET - IPPROTO_DCCP */); 85