Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  *  net/dccp/diag.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *  An implementation of the DCCP protocol
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *  Arnaldo Carvalho de Melo <acme@mandriva.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/inet_diag.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "ccid.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include "dccp.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) static void dccp_get_info(struct sock *sk, struct tcp_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	struct dccp_sock *dp = dccp_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	const struct inet_connection_sock *icsk = inet_csk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	memset(info, 0, sizeof(*info));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	info->tcpi_state	= sk->sk_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	info->tcpi_retransmits	= icsk->icsk_retransmits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	info->tcpi_probes	= icsk->icsk_probes_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	info->tcpi_backoff	= icsk->icsk_backoff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	info->tcpi_pmtu		= icsk->icsk_pmtu_cookie;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	if (dp->dccps_hc_rx_ackvec != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 		info->tcpi_options |= TCPI_OPT_SACK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	if (dp->dccps_hc_rx_ccid != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 		ccid_hc_rx_get_info(dp->dccps_hc_rx_ccid, sk, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	if (dp->dccps_hc_tx_ccid != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 		ccid_hc_tx_get_info(dp->dccps_hc_tx_ccid, sk, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static void dccp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 			       void *_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	r->idiag_rqueue = r->idiag_wqueue = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	if (_info != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		dccp_get_info(sk, _info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static void dccp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 			   const struct inet_diag_req_v2 *r)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	inet_diag_dump_icsk(&dccp_hashinfo, skb, cb, r);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static int dccp_diag_dump_one(struct netlink_callback *cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 			      const struct inet_diag_req_v2 *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	return inet_diag_dump_one_icsk(&dccp_hashinfo, cb, req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static const struct inet_diag_handler dccp_diag_handler = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	.dump		 = dccp_diag_dump,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	.dump_one	 = dccp_diag_dump_one,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	.idiag_get_info	 = dccp_diag_get_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	.idiag_type	 = IPPROTO_DCCP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	.idiag_info_size = sizeof(struct tcp_info),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) static int __init dccp_diag_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	return inet_diag_register(&dccp_diag_handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) static void __exit dccp_diag_fini(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 	inet_diag_unregister(&dccp_diag_handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) module_init(dccp_diag_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) module_exit(dccp_diag_fini);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) MODULE_DESCRIPTION("DCCP inet_diag handler");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2-33 /* AF_INET - IPPROTO_DCCP */);