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