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685a6bf8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
d021c344 AK |
2 | /* |
3 | * VMware vSockets Driver | |
4 | * | |
5 | * Copyright (C) 2007-2012 VMware, Inc. All rights reserved. | |
d021c344 AK |
6 | */ |
7 | ||
8 | #include <linux/types.h> | |
9 | #include <linux/socket.h> | |
10 | #include <linux/stddef.h> | |
11 | #include <net/sock.h> | |
82a54d0e | 12 | #include <net/vsock_addr.h> |
d021c344 AK |
13 | |
14 | void 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 | } | |
21 | EXPORT_SYMBOL_GPL(vsock_addr_init); | |
22 | ||
23 | int vsock_addr_validate(const struct sockaddr_vm *addr) | |
24 | { | |
cada7ccd AP |
25 | __u8 svm_valid_flags = VMADDR_FLAG_TO_HOST; |
26 | ||
d021c344 AK |
27 | if (!addr) |
28 | return -EFAULT; | |
29 | ||
30 | if (addr->svm_family != AF_VSOCK) | |
31 | return -EAFNOSUPPORT; | |
32 | ||
cada7ccd | 33 | if (addr->svm_flags & ~svm_valid_flags) |
d021c344 AK |
34 | return -EINVAL; |
35 | ||
36 | return 0; | |
37 | } | |
38 | EXPORT_SYMBOL_GPL(vsock_addr_validate); | |
39 | ||
40 | bool vsock_addr_bound(const struct sockaddr_vm *addr) | |
41 | { | |
42 | return addr->svm_port != VMADDR_PORT_ANY; | |
43 | } | |
44 | EXPORT_SYMBOL_GPL(vsock_addr_bound); | |
45 | ||
46 | void vsock_addr_unbind(struct sockaddr_vm *addr) | |
47 | { | |
48 | vsock_addr_init(addr, VMADDR_CID_ANY, VMADDR_PORT_ANY); | |
49 | } | |
50 | EXPORT_SYMBOL_GPL(vsock_addr_unbind); | |
51 | ||
52 | bool 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 | } | |
58 | EXPORT_SYMBOL_GPL(vsock_addr_equals_addr); | |
59 | ||
d021c344 AK |
60 | int 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 | } | |
69 | EXPORT_SYMBOL_GPL(vsock_addr_cast); |