dccp: Basic data structure for feature negotiation

[mv-sheeva.git] / net / dccp / feat.c

diff --git a/net/dccp/feat.c b/net/dccp/feat.c
index 933a0ecf8d463b0649fd69f78335533d86950517..94a81b8e5efbac229fb1dd773b8fe02322c0d249 100644 (file)
--- a/net/dccp/feat.c
+++ b/net/dccp/feat.c
@@ -23,6 +23,20 @@
 
 #define DCCP_FEAT_SP_NOAGREE (-123)
 
+/* copy constructor, fval must not already contain allocated memory */
+static int dccp_feat_clone_sp_val(dccp_feat_val *fval, u8 const *val, u8 len)
+{
+       fval->sp.len = len;
+       if (fval->sp.len > 0) {
+               fval->sp.vec = kmemdup(val, len, gfp_any());
+               if (fval->sp.vec == NULL) {
+                       fval->sp.len = 0;
+                       return -ENOBUFS;
+               }
+       }
+       return 0;
+}
+
 int dccp_feat_change(struct dccp_minisock *dmsk, u8 type, u8 feature,
                     u8 *val, u8 len, gfp_t gfp)
 {