1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * VMware vSockets Driver
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2007-2012 VMware, Inc. All rights reserved.
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/types.h>
9*4882a593Smuzhiyun #include <linux/socket.h>
10*4882a593Smuzhiyun #include <linux/stddef.h>
11*4882a593Smuzhiyun #include <net/sock.h>
12*4882a593Smuzhiyun #include <net/vsock_addr.h>
13*4882a593Smuzhiyun
vsock_addr_init(struct sockaddr_vm * addr,u32 cid,u32 port)14*4882a593Smuzhiyun void vsock_addr_init(struct sockaddr_vm *addr, u32 cid, u32 port)
15*4882a593Smuzhiyun {
16*4882a593Smuzhiyun memset(addr, 0, sizeof(*addr));
17*4882a593Smuzhiyun addr->svm_family = AF_VSOCK;
18*4882a593Smuzhiyun addr->svm_cid = cid;
19*4882a593Smuzhiyun addr->svm_port = port;
20*4882a593Smuzhiyun }
21*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(vsock_addr_init);
22*4882a593Smuzhiyun
vsock_addr_validate(const struct sockaddr_vm * addr)23*4882a593Smuzhiyun int vsock_addr_validate(const struct sockaddr_vm *addr)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun if (!addr)
26*4882a593Smuzhiyun return -EFAULT;
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun if (addr->svm_family != AF_VSOCK)
29*4882a593Smuzhiyun return -EAFNOSUPPORT;
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun if (addr->svm_zero[0] != 0)
32*4882a593Smuzhiyun return -EINVAL;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun return 0;
35*4882a593Smuzhiyun }
36*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(vsock_addr_validate);
37*4882a593Smuzhiyun
vsock_addr_bound(const struct sockaddr_vm * addr)38*4882a593Smuzhiyun bool vsock_addr_bound(const struct sockaddr_vm *addr)
39*4882a593Smuzhiyun {
40*4882a593Smuzhiyun return addr->svm_port != VMADDR_PORT_ANY;
41*4882a593Smuzhiyun }
42*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(vsock_addr_bound);
43*4882a593Smuzhiyun
vsock_addr_unbind(struct sockaddr_vm * addr)44*4882a593Smuzhiyun void vsock_addr_unbind(struct sockaddr_vm *addr)
45*4882a593Smuzhiyun {
46*4882a593Smuzhiyun vsock_addr_init(addr, VMADDR_CID_ANY, VMADDR_PORT_ANY);
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(vsock_addr_unbind);
49*4882a593Smuzhiyun
vsock_addr_equals_addr(const struct sockaddr_vm * addr,const struct sockaddr_vm * other)50*4882a593Smuzhiyun bool vsock_addr_equals_addr(const struct sockaddr_vm *addr,
51*4882a593Smuzhiyun const struct sockaddr_vm *other)
52*4882a593Smuzhiyun {
53*4882a593Smuzhiyun return addr->svm_cid == other->svm_cid &&
54*4882a593Smuzhiyun addr->svm_port == other->svm_port;
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(vsock_addr_equals_addr);
57*4882a593Smuzhiyun
vsock_addr_cast(const struct sockaddr * addr,size_t len,struct sockaddr_vm ** out_addr)58*4882a593Smuzhiyun int vsock_addr_cast(const struct sockaddr *addr,
59*4882a593Smuzhiyun size_t len, struct sockaddr_vm **out_addr)
60*4882a593Smuzhiyun {
61*4882a593Smuzhiyun if (len < sizeof(**out_addr))
62*4882a593Smuzhiyun return -EFAULT;
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun *out_addr = (struct sockaddr_vm *)addr;
65*4882a593Smuzhiyun return vsock_addr_validate(*out_addr);
66*4882a593Smuzhiyun }
67*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(vsock_addr_cast);
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