SUNRPC: Provide functions for managing universal addresses
Introduce a set of functions in the kernel's RPC implementation for
converting between a socket address and either a standard
presentation address string or an RPC universal address.
The universal address functions will be used to encode and decode
RPCB_FOO and NFSv4 SETCLIENTID arguments. The other functions are
part of a previous promise to deliver shared functions that can be
used by upper-layer protocols to display and manipulate IP
addresses.
The kernel's current address printf formatters were designed
specifically for kernel to user-space APIs that require a particular
string format for socket addresses, thus are somewhat limited for the
purposes of sunrpc.ko. The formatter for IPv6 addresses, %pI6, does
not support short-handing or scope IDs. Also, these printf formatters
are unique per address family, so a separate formatter string is
required for printing AF_INET and AF_INET6 addresses.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h
index 37881f1a..2636e8a 100644
--- a/include/linux/sunrpc/clnt.h
+++ b/include/linux/sunrpc/clnt.h
@@ -9,6 +9,10 @@
#ifndef _LINUX_SUNRPC_CLNT_H
#define _LINUX_SUNRPC_CLNT_H
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+
#include <linux/sunrpc/msg_prot.h>
#include <linux/sunrpc/sched.h>
#include <linux/sunrpc/xprt.h>
@@ -151,5 +155,39 @@
size_t rpc_peeraddr(struct rpc_clnt *, struct sockaddr *, size_t);
const char *rpc_peeraddr2str(struct rpc_clnt *, enum rpc_display_format_t);
+size_t rpc_ntop(const struct sockaddr *, char *, const size_t);
+size_t rpc_pton(const char *, const size_t,
+ struct sockaddr *, const size_t);
+char * rpc_sockaddr2uaddr(const struct sockaddr *);
+size_t rpc_uaddr2sockaddr(const char *, const size_t,
+ struct sockaddr *, const size_t);
+
+static inline unsigned short rpc_get_port(const struct sockaddr *sap)
+{
+ switch (sap->sa_family) {
+ case AF_INET:
+ return ntohs(((struct sockaddr_in *)sap)->sin_port);
+ case AF_INET6:
+ return ntohs(((struct sockaddr_in6 *)sap)->sin6_port);
+ }
+ return 0;
+}
+
+static inline void rpc_set_port(struct sockaddr *sap,
+ const unsigned short port)
+{
+ switch (sap->sa_family) {
+ case AF_INET:
+ ((struct sockaddr_in *)sap)->sin_port = htons(port);
+ break;
+ case AF_INET6:
+ ((struct sockaddr_in6 *)sap)->sin6_port = htons(port);
+ break;
+ }
+}
+
+#define IPV6_SCOPE_DELIMITER '%'
+#define IPV6_SCOPE_ID_LEN sizeof("%nnnnnnnnnn")
+
#endif /* __KERNEL__ */
#endif /* _LINUX_SUNRPC_CLNT_H */