[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>

diff --git a/include/linux/dccp.h b/include/linux/dccp.h
index 13f9b78483fc3ded5464719f3f089b1e39205ebd..71fab4311e92624ff985793df2d9c14777b7e46c 100644 (file)
--- a/include/linux/dccp.h
+++ b/include/linux/dccp.h
@@ -179,6 +179,8 @@ enum {
 /* DCCP socket options */
 #define DCCP_SOCKOPT_PACKET_SIZE       1
 #define DCCP_SOCKOPT_SERVICE           2
+#define DCCP_SOCKOPT_CCID_RX_INFO      128
+#define DCCP_SOCKOPT_CCID_TX_INFO      192
 
 #define DCCP_SERVICE_LIST_MAX_LEN      32
 

diff --git a/net/dccp/ccid.h b/net/dccp/ccid.h
index 962f1e9e2f7e5fe42c16112ec657bdd7174f2aac..21e55142dcd3b9b85e5c54d6630a788b3d74637c 100644 (file)
--- a/net/dccp/ccid.h
+++ b/net/dccp/ccid.h
@@ -14,6 +14,7 @@
  */
 
 #include <net/sock.h>
+#include <linux/compiler.h>
 #include <linux/dccp.h>
 #include <linux/list.h>
 #include <linux/module.h>
@@ -54,6 +55,14 @@ struct ccid {
                                               struct tcp_info *info);
        void            (*ccid_hc_tx_get_info)(struct sock *sk,
                                               struct tcp_info *info);
+       int             (*ccid_hc_rx_getsockopt)(struct sock *sk,
+                                                const int optname, int len,
+                                                u32 __user *optval,
+                                                int __user *optlen);
+       int             (*ccid_hc_tx_getsockopt)(struct sock *sk,
+                                                const int optname, int len,
+                                                u32 __user *optval,
+                                                int __user *optlen);
 };
 
 extern int        ccid_register(struct ccid *ccid);
@@ -177,4 +186,26 @@ static inline void ccid_hc_tx_get_info(struct ccid *ccid, struct sock *sk,
        if (ccid->ccid_hc_tx_get_info != NULL)
                ccid->ccid_hc_tx_get_info(sk, info);
 }
+
+static inline int ccid_hc_rx_getsockopt(struct ccid *ccid, struct sock *sk,
+                                       const int optname, int len,
+                                       u32 __user *optval, int __user *optlen)
+{
+       int rc = -ENOPROTOOPT;
+       if (ccid->ccid_hc_rx_getsockopt != NULL)
+               rc = ccid->ccid_hc_rx_getsockopt(sk, optname, len,
+                                                optval, optlen);
+       return rc;
+}
+
+static inline int ccid_hc_tx_getsockopt(struct ccid *ccid, struct sock *sk,
+                                       const int optname, int len,
+                                       u32 __user *optval, int __user *optlen)
+{
+       int rc = -ENOPROTOOPT;
+       if (ccid->ccid_hc_tx_getsockopt != NULL)
+               rc = ccid->ccid_hc_tx_getsockopt(sk, optname, len,
+                                                optval, optlen);
+       return rc;
+}
 #endif /* _CCID_H */

diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c
index 38aa84986118564379043c462b19e832f8342933..aa68e0ab274d4b837a8147b6cb4d677d53740185 100644 (file)
--- 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);

diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index 9bda2868eba669cc387ca4035e000b53b6dfc3ad..a1cfd0e9e3bc922ff3e670d49b8412c26f0c5d62 100644 (file)
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -325,12 +325,7 @@ int dccp_getsockopt(struct sock *sk, int level, int optname,
        if (get_user(len, optlen))
                return -EFAULT;
 
-       if (optname == DCCP_SOCKOPT_SERVICE)
-               return dccp_getsockopt_service(sk, len,
-                                              (u32 __user *)optval, optlen);
-
-       len = min_t(unsigned int, len, sizeof(int));
-       if (len < 0)
+       if (len < sizeof(int))
                return -EINVAL;
 
        dp = dccp_sk(sk);
@@ -338,7 +333,17 @@ int dccp_getsockopt(struct sock *sk, int level, int optname,
        switch (optname) {
        case DCCP_SOCKOPT_PACKET_SIZE:
                val = dp->dccps_packet_size;
+               len = sizeof(dp->dccps_packet_size);
                break;
+       case DCCP_SOCKOPT_SERVICE:
+               return dccp_getsockopt_service(sk, len,
+                                              (u32 __user *)optval, optlen);
+       case 128 ... 191:
+               return ccid_hc_rx_getsockopt(dp->dccps_hc_rx_ccid, sk, optname,
+                                            len, (u32 __user *)optval, optlen);
+       case 192 ... 255:
+               return ccid_hc_tx_getsockopt(dp->dccps_hc_tx_ccid, sk, optname,
+                                            len, (u32 __user *)optval, optlen);
        default:
                return -ENOPROTOOPT;
        }