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
vsock_addr_init(struct sockaddr_vm * addr,u32 cid,u32 port)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
vsock_addr_validate(const struct sockaddr_vm * addr)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
vsock_addr_bound(const struct sockaddr_vm * addr)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
vsock_addr_unbind(struct sockaddr_vm * addr)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
vsock_addr_equals_addr(const struct sockaddr_vm * addr,const struct sockaddr_vm * other)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
vsock_addr_cast(const struct sockaddr * addr,size_t len,struct sockaddr_vm ** out_addr)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);
77