1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * VMware vSockets Driver
4 *
5 * Copyright (C) 2007-2012 VMware, Inc. All rights reserved.
6 */
7
8#include <linux/types.h>
9#include <linux/socket.h>
10#include <linux/stddef.h>
11#include <net/sock.h>
12#include <net/vsock_addr.h>
13
14void vsock_addr_init(struct sockaddr_vm *addr, u32 cid, u32 port)
15{
16	memset(addr, 0, sizeof(*addr));
17	addr->svm_family = AF_VSOCK;
18	addr->svm_cid = cid;
19	addr->svm_port = port;
20}
21EXPORT_SYMBOL_GPL(vsock_addr_init);
22
23int vsock_addr_validate(const struct sockaddr_vm *addr)
24{
25	if (!addr)
26		return -EFAULT;
27
28	if (addr->svm_family != AF_VSOCK)
29		return -EAFNOSUPPORT;
30
31	if (addr->svm_zero[0] != 0)
32		return -EINVAL;
33
34	return 0;
35}
36EXPORT_SYMBOL_GPL(vsock_addr_validate);
37
38bool vsock_addr_bound(const struct sockaddr_vm *addr)
39{
40	return addr->svm_port != VMADDR_PORT_ANY;
41}
42EXPORT_SYMBOL_GPL(vsock_addr_bound);
43
44void vsock_addr_unbind(struct sockaddr_vm *addr)
45{
46	vsock_addr_init(addr, VMADDR_CID_ANY, VMADDR_PORT_ANY);
47}
48EXPORT_SYMBOL_GPL(vsock_addr_unbind);
49
50bool vsock_addr_equals_addr(const struct sockaddr_vm *addr,
51			    const struct sockaddr_vm *other)
52{
53	return addr->svm_cid == other->svm_cid &&
54		addr->svm_port == other->svm_port;
55}
56EXPORT_SYMBOL_GPL(vsock_addr_equals_addr);
57
58int vsock_addr_cast(const struct sockaddr *addr,
59		    size_t len, struct sockaddr_vm **out_addr)
60{
61	if (len < sizeof(**out_addr))
62		return -EFAULT;
63
64	*out_addr = (struct sockaddr_vm *)addr;
65	return vsock_addr_validate(*out_addr);
66}
67EXPORT_SYMBOL_GPL(vsock_addr_cast);
68