ObjFW  Documentation

/*
 * Copyright (c) 2008-2024 Jonathan Schleifer <js@nil.im>
 *
 * All rights reserved.
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version 3.0 only,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
 * version 3.0 for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3.0 along with this program. If not, see
 * <https://www.gnu.org/licenses/>.
 */

#import "OFDatagramSocket.h"

OF_ASSUME_NONNULL_BEGIN

@class OFString;

/**
 * @protocol OFUDPSocketDelegate OFUDPSocket.h ObjFW/ObjFW.h
 *
 * @brief A delegate for OFUDPSocket.
 */
@protocol OFUDPSocketDelegate <OFDatagramSocketDelegate>
@end

/**
 * @class OFUDPSocket OFUDPSocket.h ObjFW/ObjFW.h
 *
 * @brief A class which provides methods to create and use UDP sockets.
 *
 * Addresses are of type @ref OFSocketAddress. You can use the current thread's
 * @ref OFDNSResolver to create an address for a host / port pair,
 * @ref OFSocketAddressString to get the IP address string for an address and
 * @ref OFSocketAddressIPPort to get the port for an address. If you want to
 * compare two addresses, you can use
 * @ref OFSocketAddressEqual and you can use @ref OFSocketAddressHash to get a
 * hash to use in e.g. @ref OFMapTable.
 *
 * @warning Even though the OFCopying protocol is implemented, it does *not*
 *	    return an independent copy of the socket, but instead retains it.
 *	    This is so that the socket can be used as a key for a dictionary,
 *	    so context can be associated with a socket. Using a socket in more
 *	    than one thread at the same time is not thread-safe, even if copy
 *	    was called to create one "instance" for every thread!
 */
@interface OFUDPSocket: OFDatagramSocket
{
#ifdef OF_WII
	uint16_t _port;
#endif
	OF_RESERVE_IVARS(OFUDPSocket, 4)
}

/**
 * @brief The delegate for asynchronous operations on the socket.
 *
 * @note The delegate is retained for as long as asynchronous operations are
 *	 still ongoing.
 */
@property OF_NULLABLE_PROPERTY (assign, nonatomic)
    id <OFUDPSocketDelegate> delegate;

/**
 * @brief Binds the socket to the specified host and port.
 *
 * @param host The host to bind to. Use `@"0.0.0.0"` for IPv4 or `@"::"` for
 *	       IPv6 to bind to all.
 * @param port The port to bind to. If the port is 0, an unused port will be
 *	       chosen, which can be obtained using the return value.
 * @return The address the socket was bound to
 * @throw OFBindIPSocketFailedException Binding failed
 * @throw OFAlreadyOpenException The socket is already bound
 */
- (OFSocketAddress)bindToHost: (OFString *)host port: (uint16_t)port;
@end

OF_ASSUME_NONNULL_END