[DCCP]: Introduce CCID getsockopt for the CCIDs

Allocation for the optnames is similar to the DCCP options, with a
range for rx and tx half connection CCIDs.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 56 insertions, 0 deletions

diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c
index 38aa84986118..aa68e0ab274d 100644
--- a/net/dccp/ccids/ccid3.c
+++ b/net/dccp/ccids/ccid3.c
@@ -1120,6 +1120,60 @@ static void ccid3_hc_tx_get_info(struct sock *sk, struct tcp_info *info)
         info->tcpi_rtt = hctx->ccid3hctx_rtt;
 }
 
+static int ccid3_hc_rx_getsockopt(struct sock *sk, const int optname, int len,
+                                  u32 __user *optval, int __user *optlen)
+{
+        const struct ccid3_hc_rx_sock *hcrx = ccid3_hc_rx_sk(sk);
+        const void *val;
+        
+        /* Listen socks doesn't have a private CCID block */
+        if (sk->sk_state == DCCP_LISTEN)
+                return -EINVAL;
+
+        switch (optname) {
+        case DCCP_SOCKOPT_CCID_RX_INFO:
+                if (len < sizeof(hcrx->ccid3hcrx_tfrc))
+                        return -EINVAL;
+                len = sizeof(hcrx->ccid3hcrx_tfrc);
+                val = &hcrx->ccid3hcrx_tfrc;
+                break;
+        default:
+                return -ENOPROTOOPT;
+        }
+
+        if (put_user(len, optlen) || copy_to_user(optval, val, len))
+                return -EFAULT;
+
+        return 0;
+}
+
+static int ccid3_hc_tx_getsockopt(struct sock *sk, const int optname, int len,
+                                  u32 __user *optval, int __user *optlen)
+{
+        const struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk);
+        const void *val;
+        
+        /* Listen socks doesn't have a private CCID block */
+        if (sk->sk_state == DCCP_LISTEN)
+                return -EINVAL;
+
+        switch (optname) {
+        case DCCP_SOCKOPT_CCID_TX_INFO:
+                if (len < sizeof(hctx->ccid3hctx_tfrc))
+                        return -EINVAL;
+                len = sizeof(hctx->ccid3hctx_tfrc);
+                val = &hctx->ccid3hctx_tfrc;
+                break;
+        default:
+                return -ENOPROTOOPT;
+        }
+
+        if (put_user(len, optlen) || copy_to_user(optval, val, len))
+                return -EFAULT;
+
+        return 0;
+}
+
 static struct ccid ccid3 = {
         .ccid_id                   = 3,
         .ccid_name                 = "ccid3",
@@ -1139,6 +1193,8 @@ static struct ccid ccid3 = {
         .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,
+        .ccid_hc_rx_getsockopt     = ccid3_hc_rx_getsockopt,
+        .ccid_hc_tx_getsockopt     = ccid3_hc_tx_getsockopt,
 };
  
 module_param(ccid3_debug, int, 0444);