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d021c344 AK |
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 | ||
21 | #include "vsock_addr.h" | |
22 | ||
23 | void vsock_addr_init(struct sockaddr_vm *addr, u32 cid, u32 port) | |
24 | { | |
25 | memset(addr, 0, sizeof(*addr)); | |
26 | addr->svm_family = AF_VSOCK; | |
27 | addr->svm_cid = cid; | |
28 | addr->svm_port = port; | |
29 | } | |
30 | EXPORT_SYMBOL_GPL(vsock_addr_init); | |
31 | ||
32 | int vsock_addr_validate(const struct sockaddr_vm *addr) | |
33 | { | |
34 | if (!addr) | |
35 | return -EFAULT; | |
36 | ||
37 | if (addr->svm_family != AF_VSOCK) | |
38 | return -EAFNOSUPPORT; | |
39 | ||
40 | if (addr->svm_zero[0] != 0) | |
41 | return -EINVAL; | |
42 | ||
43 | return 0; | |
44 | } | |
45 | EXPORT_SYMBOL_GPL(vsock_addr_validate); | |
46 | ||
47 | bool vsock_addr_bound(const struct sockaddr_vm *addr) | |
48 | { | |
49 | return addr->svm_port != VMADDR_PORT_ANY; | |
50 | } | |
51 | EXPORT_SYMBOL_GPL(vsock_addr_bound); | |
52 | ||
53 | void vsock_addr_unbind(struct sockaddr_vm *addr) | |
54 | { | |
55 | vsock_addr_init(addr, VMADDR_CID_ANY, VMADDR_PORT_ANY); | |
56 | } | |
57 | EXPORT_SYMBOL_GPL(vsock_addr_unbind); | |
58 | ||
59 | bool vsock_addr_equals_addr(const struct sockaddr_vm *addr, | |
60 | const struct sockaddr_vm *other) | |
61 | { | |
62 | return addr->svm_cid == other->svm_cid && | |
63 | addr->svm_port == other->svm_port; | |
64 | } | |
65 | EXPORT_SYMBOL_GPL(vsock_addr_equals_addr); | |
66 | ||
d021c344 AK |
67 | int vsock_addr_cast(const struct sockaddr *addr, |
68 | size_t len, struct sockaddr_vm **out_addr) | |
69 | { | |
70 | if (len < sizeof(**out_addr)) | |
71 | return -EFAULT; | |
72 | ||
73 | *out_addr = (struct sockaddr_vm *)addr; | |
74 | return vsock_addr_validate(*out_addr); | |
75 | } | |
76 | EXPORT_SYMBOL_GPL(vsock_addr_cast); |