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 * 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 <net/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;

int vsock_addr_validate(const struct sockaddr_vm *addr)
	if (!addr)
		return -EFAULT;

	if (addr->svm_family != AF_VSOCK)

	if (addr->svm_zero[0] != 0)
		return -EINVAL;

	return 0;

bool vsock_addr_bound(const struct sockaddr_vm *addr)
	return addr->svm_port != VMADDR_PORT_ANY;

void vsock_addr_unbind(struct sockaddr_vm *addr)
	vsock_addr_init(addr, VMADDR_CID_ANY, VMADDR_PORT_ANY);

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;

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);