87 строки
2.2 KiB
C
87 строки
2.2 KiB
C
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/*
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* VMware vSockets Driver
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*
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* Copyright (C) 2007-2012 VMware, Inc. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation version 2 and no later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#include <linux/types.h>
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#include <linux/socket.h>
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#include <linux/stddef.h>
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#include <net/sock.h>
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#include "vsock_addr.h"
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void vsock_addr_init(struct sockaddr_vm *addr, u32 cid, u32 port)
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{
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memset(addr, 0, sizeof(*addr));
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addr->svm_family = AF_VSOCK;
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addr->svm_cid = cid;
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addr->svm_port = port;
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}
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EXPORT_SYMBOL_GPL(vsock_addr_init);
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int vsock_addr_validate(const struct sockaddr_vm *addr)
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{
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if (!addr)
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return -EFAULT;
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if (addr->svm_family != AF_VSOCK)
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return -EAFNOSUPPORT;
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if (addr->svm_zero[0] != 0)
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return -EINVAL;
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return 0;
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}
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EXPORT_SYMBOL_GPL(vsock_addr_validate);
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bool vsock_addr_bound(const struct sockaddr_vm *addr)
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{
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return addr->svm_port != VMADDR_PORT_ANY;
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}
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EXPORT_SYMBOL_GPL(vsock_addr_bound);
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void vsock_addr_unbind(struct sockaddr_vm *addr)
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{
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vsock_addr_init(addr, VMADDR_CID_ANY, VMADDR_PORT_ANY);
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}
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EXPORT_SYMBOL_GPL(vsock_addr_unbind);
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bool vsock_addr_equals_addr(const struct sockaddr_vm *addr,
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const struct sockaddr_vm *other)
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{
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return addr->svm_cid == other->svm_cid &&
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addr->svm_port == other->svm_port;
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}
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EXPORT_SYMBOL_GPL(vsock_addr_equals_addr);
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bool vsock_addr_equals_addr_any(const struct sockaddr_vm *addr,
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const struct sockaddr_vm *other)
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{
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return (addr->svm_cid == VMADDR_CID_ANY ||
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other->svm_cid == VMADDR_CID_ANY ||
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addr->svm_cid == other->svm_cid) &&
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addr->svm_port == other->svm_port;
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}
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EXPORT_SYMBOL_GPL(vsock_addr_equals_addr_any);
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int vsock_addr_cast(const struct sockaddr *addr,
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size_t len, struct sockaddr_vm **out_addr)
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{
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if (len < sizeof(**out_addr))
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return -EFAULT;
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*out_addr = (struct sockaddr_vm *)addr;
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return vsock_addr_validate(*out_addr);
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}
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EXPORT_SYMBOL_GPL(vsock_addr_cast);
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