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 | |
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 | { |
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 | } |
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 | |
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); |
70 | |