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	__u8 svm_valid_flags = VMADDR_FLAG_TO_HOST;
26
27	if (!addr)
28		return -EFAULT;
29
30	if (addr->svm_family != AF_VSOCK)
31		return -EAFNOSUPPORT;
32
33	if (addr->svm_flags & ~svm_valid_flags)
34		return -EINVAL;
35
36	return 0;
37}
38EXPORT_SYMBOL_GPL(vsock_addr_validate);
39
40bool vsock_addr_bound(const struct sockaddr_vm *addr)
41{
42	return addr->svm_port != VMADDR_PORT_ANY;
43}
44EXPORT_SYMBOL_GPL(vsock_addr_bound);
45
46void vsock_addr_unbind(struct sockaddr_vm *addr)
47{
48	vsock_addr_init(addr, VMADDR_CID_ANY, VMADDR_PORT_ANY);
49}
50EXPORT_SYMBOL_GPL(vsock_addr_unbind);
51
52bool vsock_addr_equals_addr(const struct sockaddr_vm *addr,
53			    const struct sockaddr_vm *other)
54{
55	return addr->svm_cid == other->svm_cid &&
56		addr->svm_port == other->svm_port;
57}
58EXPORT_SYMBOL_GPL(vsock_addr_equals_addr);
59
60int vsock_addr_cast(const struct sockaddr *addr,
61		    size_t len, struct sockaddr_vm **out_addr)
62{
63	if (len < sizeof(**out_addr))
64		return -EFAULT;
65
66	*out_addr = (struct sockaddr_vm *)addr;
67	return vsock_addr_validate(*out_addr);
68}
69EXPORT_SYMBOL_GPL(vsock_addr_cast);

 
 1/*
 2 * VMware vSockets Driver
 3 *
 4 * Copyright (C) 2007-2012 VMware, Inc. All rights reserved.
 5 *
 6 * This program is free software; you can redistribute it and/or modify it
 7 * under the terms of the GNU General Public License as published by the Free
 8 * Software Foundation version 2 and no later version.
 9 *
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
13 * more details.
14 */
15
16#include <linux/types.h>
17#include <linux/socket.h>
18#include <linux/stddef.h>
19#include <net/sock.h>
20#include <net/vsock_addr.h>
21
22void vsock_addr_init(struct sockaddr_vm *addr, u32 cid, u32 port)
23{
24	memset(addr, 0, sizeof(*addr));
25	addr->svm_family = AF_VSOCK;
26	addr->svm_cid = cid;
27	addr->svm_port = port;
28}
29EXPORT_SYMBOL_GPL(vsock_addr_init);
30
31int vsock_addr_validate(const struct sockaddr_vm *addr)
32{
 
 
33	if (!addr)
34		return -EFAULT;
35
36	if (addr->svm_family != AF_VSOCK)
37		return -EAFNOSUPPORT;
38
39	if (addr->svm_zero[0] != 0)
40		return -EINVAL;
41
42	return 0;
43}
44EXPORT_SYMBOL_GPL(vsock_addr_validate);
45
46bool vsock_addr_bound(const struct sockaddr_vm *addr)
47{
48	return addr->svm_port != VMADDR_PORT_ANY;
49}
50EXPORT_SYMBOL_GPL(vsock_addr_bound);
51
52void vsock_addr_unbind(struct sockaddr_vm *addr)
53{
54	vsock_addr_init(addr, VMADDR_CID_ANY, VMADDR_PORT_ANY);
55}
56EXPORT_SYMBOL_GPL(vsock_addr_unbind);
57
58bool vsock_addr_equals_addr(const struct sockaddr_vm *addr,
59			    const struct sockaddr_vm *other)
60{
61	return addr->svm_cid == other->svm_cid &&
62		addr->svm_port == other->svm_port;
63}
64EXPORT_SYMBOL_GPL(vsock_addr_equals_addr);
65
66int vsock_addr_cast(const struct sockaddr *addr,
67		    size_t len, struct sockaddr_vm **out_addr)
68{
69	if (len < sizeof(**out_addr))
70		return -EFAULT;
71
72	*out_addr = (struct sockaddr_vm *)addr;
73	return vsock_addr_validate(*out_addr);
74}
75EXPORT_SYMBOL_GPL(vsock_addr_cast);