1 files changed, 86 insertions, 0 deletions

diff --git a/net/vmw_vsock/vsock_addr.c b/net/vmw_vsock/vsock_addr.c
new file mode 100644
index 000000000000..b7df1aea7c59
--- /dev/null
+++ b/net/vmw_vsock/vsock_addr.c
@@ -0,0 +1,86 @@
+/*
+ * VMware vSockets Driver
+ *
+ * Copyright (C) 2007-2012 VMware, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation version 2 and no later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/stddef.h>
+#include <net/sock.h>
+
+#include "vsock_addr.h"
+
+void vsock_addr_init(struct sockaddr_vm *addr, u32 cid, u32 port)
+{
+        memset(addr, 0, sizeof(*addr));
+        addr->svm_family = AF_VSOCK;
+        addr->svm_cid = cid;
+        addr->svm_port = port;
+}
+EXPORT_SYMBOL_GPL(vsock_addr_init);
+
+int vsock_addr_validate(const struct sockaddr_vm *addr)
+{
+        if (!addr)
+                return -EFAULT;
+
+        if (addr->svm_family != AF_VSOCK)
+                return -EAFNOSUPPORT;
+
+        if (addr->svm_zero[0] != 0)
+                return -EINVAL;
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(vsock_addr_validate);
+
+bool vsock_addr_bound(const struct sockaddr_vm *addr)
+{
+        return addr->svm_port != VMADDR_PORT_ANY;
+}
+EXPORT_SYMBOL_GPL(vsock_addr_bound);
+
+void vsock_addr_unbind(struct sockaddr_vm *addr)
+{
+        vsock_addr_init(addr, VMADDR_CID_ANY, VMADDR_PORT_ANY);
+}
+EXPORT_SYMBOL_GPL(vsock_addr_unbind);
+
+bool vsock_addr_equals_addr(const struct sockaddr_vm *addr,
+                            const struct sockaddr_vm *other)
+{
+        return addr->svm_cid == other->svm_cid &&
+                addr->svm_port == other->svm_port;
+}
+EXPORT_SYMBOL_GPL(vsock_addr_equals_addr);
+
+bool vsock_addr_equals_addr_any(const struct sockaddr_vm *addr,
+                                const struct sockaddr_vm *other)
+{
+        return (addr->svm_cid == VMADDR_CID_ANY ||
+                other->svm_cid == VMADDR_CID_ANY ||
+                addr->svm_cid == other->svm_cid) &&
+               addr->svm_port == other->svm_port;
+}
+EXPORT_SYMBOL_GPL(vsock_addr_equals_addr_any);
+
+int vsock_addr_cast(const struct sockaddr *addr,
+                    size_t len, struct sockaddr_vm **out_addr)
+{
+        if (len < sizeof(**out_addr))
+                return -EFAULT;
+
+        *out_addr = (struct sockaddr_vm *)addr;
+        return vsock_addr_validate(*out_addr);
+}
+EXPORT_SYMBOL_GPL(vsock_addr_cast);