cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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vsock_addr.c (1577B)

      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
     14void 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}
     21EXPORT_SYMBOL_GPL(vsock_addr_init);
     22
     23int 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}
     38EXPORT_SYMBOL_GPL(vsock_addr_validate);
     39
     40bool vsock_addr_bound(const struct sockaddr_vm *addr)
     41{
     42	return addr->svm_port != VMADDR_PORT_ANY;
     43}
     44EXPORT_SYMBOL_GPL(vsock_addr_bound);
     45
     46void vsock_addr_unbind(struct sockaddr_vm *addr)
     47{
     48	vsock_addr_init(addr, VMADDR_CID_ANY, VMADDR_PORT_ANY);
     49}
     50EXPORT_SYMBOL_GPL(vsock_addr_unbind);
     51
     52bool 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}
     58EXPORT_SYMBOL_GPL(vsock_addr_equals_addr);
     59
     60int 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}
     69EXPORT_SYMBOL_GPL(vsock_addr_cast);