1 files changed, 84 insertions, 0 deletions
diff --git a/net/dccp/diag.c b/net/dccp/diag.c
new file mode 100644
index 0000000000..8a82c5a2c5
--- /dev/null
+++ b/net/dccp/diag.c
@@ -0,0 +1,84 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  net/dccp/diag.c
+ *
+ *  An implementation of the DCCP protocol
+ *  Arnaldo Carvalho de Melo <acme@mandriva.com>
+ */
+
+
+#include <linux/module.h>
+#include <linux/inet_diag.h>
+
+#include "ccid.h"
+#include "dccp.h"
+
+static void dccp_get_info(struct sock *sk, struct tcp_info *info)
+{
+	struct dccp_sock *dp = dccp_sk(sk);
+	const struct inet_connection_sock *icsk = inet_csk(sk);
+
+	memset(info, 0, sizeof(*info));
+
+	info->tcpi_state	= sk->sk_state;
+	info->tcpi_retransmits	= icsk->icsk_retransmits;
+	info->tcpi_probes	= icsk->icsk_probes_out;
+	info->tcpi_backoff	= icsk->icsk_backoff;
+	info->tcpi_pmtu		= icsk->icsk_pmtu_cookie;
+
+	if (dp->dccps_hc_rx_ackvec != NULL)
+		info->tcpi_options |= TCPI_OPT_SACK;
+
+	if (dp->dccps_hc_rx_ccid != NULL)
+		ccid_hc_rx_get_info(dp->dccps_hc_rx_ccid, sk, info);
+
+	if (dp->dccps_hc_tx_ccid != NULL)
+		ccid_hc_tx_get_info(dp->dccps_hc_tx_ccid, sk, info);
+}
+
+static void dccp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
+			       void *_info)
+{
+	r->idiag_rqueue = r->idiag_wqueue = 0;
+
+	if (_info != NULL)
+		dccp_get_info(sk, _info);
+}
+
+static void dccp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
+			   const struct inet_diag_req_v2 *r)
+{
+	inet_diag_dump_icsk(&dccp_hashinfo, skb, cb, r);
+}
+
+static int dccp_diag_dump_one(struct netlink_callback *cb,
+			      const struct inet_diag_req_v2 *req)
+{
+	return inet_diag_dump_one_icsk(&dccp_hashinfo, cb, req);
+}
+
+static const struct inet_diag_handler dccp_diag_handler = {
+	.dump		 = dccp_diag_dump,
+	.dump_one	 = dccp_diag_dump_one,
+	.idiag_get_info	 = dccp_diag_get_info,
+	.idiag_type	 = IPPROTO_DCCP,
+	.idiag_info_size = sizeof(struct tcp_info),
+};
+
+static int __init dccp_diag_init(void)
+{
+	return inet_diag_register(&dccp_diag_handler);
+}
+
+static void __exit dccp_diag_fini(void)
+{
+	inet_diag_unregister(&dccp_diag_handler);
+}
+
+module_init(dccp_diag_init);
+module_exit(dccp_diag_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>");
+MODULE_DESCRIPTION("DCCP inet_diag handler");
+MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2-33 /* AF_INET - IPPROTO_DCCP */);