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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_unsized *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);