Libnfs uses RFC2224 style URLs extended with libnfs specific url arguments some minor extensions.
The basic syntax of these URLs is :
-nfs://<server|ipv4>/path[?arg=val[&arg=val]*]
+nfs://<server|ipv4|ipv6>/path[?arg=val[&arg=val]*]
Arguments supported by libnfs are :
tcp-syncnt=<int> : Number of SYNs to send during the session establish