LXR linux/net/vmw_vsock/vsock

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