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/*
* Copyright (C) 2009 Wayne Meissner
*
* This file is part of the JNR project.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jnr.unixsocket;
import com.kenai.constantine.platform.ProtocolFamily;
import jnr.ffi.*;
/**
* Native unix domain socket address structure.
*/
abstract class SockAddrUnix extends Struct {
public final static int ADDR_LENGTH = 108;
protected abstract UTF8String getPathField();
protected abstract NumberField getFamilyField();
public SockAddrUnix() {
super(jnr.ffi.Runtime.getSystemRuntime());
}
/**
* Sets the protocol family of this unix socket address.
*
* @param family The protocol family, usually {@link com.kenai.constantine.platform.ProtocolFamily.PF_UNIX}
*/
public final void setFamily(ProtocolFamily family) {
getFamilyField().set(family.value());
}
/**
* Gets the protocol family of this unix socket address.
*
* @return The protocol family
*/
public final ProtocolFamily getFamily() {
return ProtocolFamily.valueOf(getFamilyField().intValue());
}
/**
* Sets the file system path of this socket address
*
* @param path The unix socket address
*/
public final void setPath(java.lang.String path) {
getPathField().set(path);
}
/**
* Gets the file system path of this socket address
*
* @return A String
*/
public final java.lang.String getPath() {
return getPathField().get();
}
/**
* Gets the maximum length of this address (including len/family header)
*
* @return The maximum size of the address in bytes
*/
public int getMaximumLength() {
return 2 + getPathField().length();
}
/**
* Gets the actual length of this address (including len/family header)
*
* @return The actual size of this address, in bytes
*/
public int length() {
return 2 + strlen(getPathField());
}
/**
* Creates a new instance of SockAddrUnix
*
* @return An instance of SockAddrUnix
*/
static SockAddrUnix create() {
return Platform.getPlatform().isBSD() ? new BSDSockAddrUnix() : new DefaultSockAddrUnix();
}
private static final int strlen(UTF8String str) {
int end = str.getMemory().indexOf(str.offset(), (byte) 0);
return end >= 0 ? end : str.length();
}
/**
* An implementation of {@link SockAddrUnix} for BSD systems
*/
static final class BSDSockAddrUnix extends SockAddrUnix {
public final Unsigned8 sun_len = new Unsigned8();
public final Unsigned8 sun_family = new Unsigned8();
public final UTF8String sun_addr = new UTF8String(ADDR_LENGTH);
protected final UTF8String getPathField() {
return sun_addr;
}
protected final NumberField getFamilyField() {
return sun_family;
}
}
/**
* An implementation of {@link SockAddrUnix} for Linux, Solaris, et, al
*/
static final class DefaultSockAddrUnix extends SockAddrUnix {
public final Unsigned16 sun_family = new Unsigned16();
public final UTF8String sun_addr = new UTF8String(ADDR_LENGTH);
protected final UTF8String getPathField() {
return sun_addr;
}
protected final NumberField getFamilyField() {
return sun_family;
}
}
}