3 files changed, 70 insertions, 1 deletions

diff --git a/net/dccp/ccid.h b/net/dccp/ccid.h
index c6767b282244..962f1e9e2f7e 100644
--- a/net/dccp/ccid.h
+++ b/net/dccp/ccid.h
@@ -50,6 +50,10 @@ struct ccid {
                                                   struct sk_buff *skb, int len);
         void            (*ccid_hc_tx_packet_sent)(struct sock *sk, int more,
                                                   int len);
+        void            (*ccid_hc_rx_get_info)(struct sock *sk,
+                                               struct tcp_info *info);
+        void            (*ccid_hc_tx_get_info)(struct sock *sk,
+                                               struct tcp_info *info);
 };
 
 extern int         ccid_register(struct ccid *ccid);
@@ -159,4 +163,18 @@ static inline void ccid_hc_rx_insert_options(struct ccid *ccid, struct sock *sk,
         if (ccid->ccid_hc_rx_insert_options != NULL)
                 ccid->ccid_hc_rx_insert_options(sk, skb);
 }
+
+static inline void ccid_hc_rx_get_info(struct ccid *ccid, struct sock *sk,
+                                       struct tcp_info *info)
+{
+        if (ccid->ccid_hc_rx_get_info != NULL)
+                ccid->ccid_hc_rx_get_info(sk, info);
+}
+
+static inline void ccid_hc_tx_get_info(struct ccid *ccid, struct sock *sk,
+                                       struct tcp_info *info)
+{
+        if (ccid->ccid_hc_tx_get_info != NULL)
+                ccid->ccid_hc_tx_get_info(sk, info);
+}
 #endif /* _CCID_H */
diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c
index 48c36afa4934..fe4cc85f5bcc 100644
--- a/net/dccp/ccids/ccid3.c
+++ b/net/dccp/ccids/ccid3.c
@@ -2020,6 +2020,31 @@ static void ccid3_hc_rx_exit(struct sock *sk)
         dp->dccps_hc_rx_ccid_private = NULL;
 }
 
+static void ccid3_hc_rx_get_info(struct sock *sk, struct tcp_info *info)
+{
+        const struct dccp_sock *dp = dccp_sk(sk);
+        const struct ccid3_hc_rx_sock *hcrx = dp->dccps_hc_rx_ccid_private;
+
+        if (hcrx == NULL)
+                return;
+
+        info->tcpi_ca_state     = hcrx->ccid3hcrx_state;
+        info->tcpi_options      |= TCPI_OPT_TIMESTAMPS;
+        info->tcpi_rcv_rtt      = hcrx->ccid3hcrx_rtt;
+}
+
+static void ccid3_hc_tx_get_info(struct sock *sk, struct tcp_info *info)
+{
+        const struct dccp_sock *dp = dccp_sk(sk);
+        const struct ccid3_hc_tx_sock *hctx = dp->dccps_hc_tx_ccid_private;
+
+        if (hctx == NULL)
+                return;
+
+        info->tcpi_rto = hctx->ccid3hctx_t_rto;
+        info->tcpi_rtt = hctx->ccid3hctx_rtt;
+}
+
 static struct ccid ccid3 = {
         .ccid_id                   = 3,
         .ccid_name                 = "ccid3",
@@ -2037,6 +2062,8 @@ static struct ccid ccid3 = {
         .ccid_hc_rx_exit           = ccid3_hc_rx_exit,
         .ccid_hc_rx_insert_options = ccid3_hc_rx_insert_options,
         .ccid_hc_rx_packet_recv    = ccid3_hc_rx_packet_recv,
+        .ccid_hc_rx_get_info       = ccid3_hc_rx_get_info,
+        .ccid_hc_tx_get_info       = ccid3_hc_tx_get_info,
 };
  
 module_param(ccid3_debug, int, 0444);
diff --git a/net/dccp/diag.c b/net/dccp/diag.c
index 0b10c176c35a..f675d8e642d3 100644
--- a/net/dccp/diag.c
+++ b/net/dccp/diag.c
@@ -14,19 +14,43 @@
 #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         = dp->dccps_pmtu_cookie;
+
+        if (dp->dccps_options.dccpo_send_ack_vector)
+                info->tcpi_options |= TCPI_OPT_SACK;
+
+        ccid_hc_rx_get_info(dp->dccps_hc_rx_ccid, sk, info);
+        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 struct inet_diag_handler dccp_diag_handler = {
         .idiag_hashinfo  = &dccp_hashinfo,
         .idiag_get_info  = dccp_diag_get_info,
         .idiag_type      = DCCPDIAG_GETSOCK,
-        .idiag_info_size = 0,
+        .idiag_info_size = sizeof(struct tcp_info),
 };
 
 static int __init dccp_diag_init(void)