| 1 | // SPDX-License-Identifier: GPL-2.0-only |
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| 2 | /* |
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| 3 | * net/dccp/diag.c |
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| 4 | * |
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| 5 | * An implementation of the DCCP protocol |
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| 6 | * Arnaldo Carvalho de Melo <acme@mandriva.com> |
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| 7 | */ |
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| 8 | |
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| 9 | |
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| 10 | #include <linux/module.h> |
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| 11 | #include <linux/inet_diag.h> |
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| 12 | |
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| 13 | #include "ccid.h" |
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| 14 | #include "dccp.h" |
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| 15 | |
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| 16 | static void dccp_get_info(struct sock *sk, struct tcp_info *info) |
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| 17 | { |
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| 18 | struct dccp_sock *dp = dccp_sk(sk); |
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| 19 | const struct inet_connection_sock *icsk = inet_csk(sk); |
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| 20 | |
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| 21 | memset(info, 0, sizeof(*info)); |
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| 22 | |
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| 23 | info->tcpi_state = sk->sk_state; |
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| 24 | info->tcpi_retransmits = icsk->icsk_retransmits; |
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| 25 | info->tcpi_probes = icsk->icsk_probes_out; |
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| 26 | info->tcpi_backoff = icsk->icsk_backoff; |
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| 27 | info->tcpi_pmtu = icsk->icsk_pmtu_cookie; |
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| 28 | |
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| 29 | if (dp->dccps_hc_rx_ackvec != NULL) |
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| 30 | info->tcpi_options |= TCPI_OPT_SACK; |
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| 31 | |
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| 32 | if (dp->dccps_hc_rx_ccid != NULL) |
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| 33 | ccid_hc_rx_get_info(ccid: dp->dccps_hc_rx_ccid, sk, info); |
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| 34 | |
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| 35 | if (dp->dccps_hc_tx_ccid != NULL) |
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| 36 | ccid_hc_tx_get_info(ccid: dp->dccps_hc_tx_ccid, sk, info); |
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| 37 | } |
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| 38 | |
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| 39 | static void dccp_diag_get_info(struct sock *sk, struct inet_diag_msg *r, |
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| 40 | void *_info) |
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| 41 | { |
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| 42 | r->idiag_rqueue = r->idiag_wqueue = 0; |
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| 43 | |
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| 44 | if (_info != NULL) |
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| 45 | dccp_get_info(sk, info: _info); |
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| 46 | } |
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| 47 | |
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| 48 | static void dccp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, |
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| 49 | const struct inet_diag_req_v2 *r) |
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| 50 | { |
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| 51 | inet_diag_dump_icsk(h: &dccp_hashinfo, skb, cb, r); |
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| 52 | } |
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| 53 | |
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| 54 | static int dccp_diag_dump_one(struct netlink_callback *cb, |
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| 55 | const struct inet_diag_req_v2 *req) |
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| 56 | { |
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| 57 | return inet_diag_dump_one_icsk(hashinfo: &dccp_hashinfo, cb, req); |
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| 58 | } |
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| 59 | |
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| 60 | static const struct inet_diag_handler dccp_diag_handler = { |
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| 61 | .owner = THIS_MODULE, |
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| 62 | .dump = dccp_diag_dump, |
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| 63 | .dump_one = dccp_diag_dump_one, |
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| 64 | .idiag_get_info = dccp_diag_get_info, |
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| 65 | .idiag_type = IPPROTO_DCCP, |
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| 66 | .idiag_info_size = sizeof(struct tcp_info), |
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| 67 | }; |
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| 68 | |
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| 69 | static int __init dccp_diag_init(void) |
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| 70 | { |
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| 71 | return inet_diag_register(handler: &dccp_diag_handler); |
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| 72 | } |
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| 73 | |
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| 74 | static void __exit dccp_diag_fini(void) |
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| 75 | { |
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| 76 | inet_diag_unregister(handler: &dccp_diag_handler); |
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| 77 | } |
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| 78 | |
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| 79 | module_init(dccp_diag_init); |
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| 80 | module_exit(dccp_diag_fini); |
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| 81 | |
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| 82 | MODULE_LICENSE("GPL" ); |
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| 83 | MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>" ); |
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| 84 | MODULE_DESCRIPTION("DCCP inet_diag handler" ); |
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| 85 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2-33 /* AF_INET - IPPROTO_DCCP */); |
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| 86 | |
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