tcp.h

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/*
 * Copyright (c) 2008 Lukas Mejdrech
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef NET_TCP_H_
#define NET_TCP_H_

#include <fibril_synch.h>

#include <net/packet.h>
#include <net/device.h>
#include <socket_core.h>
#include <tl_common.h>

typedef struct tcp_globals tcp_globals_t;

typedef struct tcp_socket_data tcp_socket_data_t;

typedef struct tcp_operation tcp_operation_t;

typedef enum tcp_socket_state tcp_socket_state_t;

enum tcp_socket_state {
        TCP_SOCKET_INITIAL,
        
        TCP_SOCKET_LISTEN,
        
        TCP_SOCKET_SYN_SENT,
        
        TCP_SOCKET_SYN_RECEIVED,
        
        TCP_SOCKET_ESTABLISHED,
        
        TCP_SOCKET_FIN_WAIT_1,
        
        TCP_SOCKET_FIN_WAIT_2,
        
        TCP_SOCKET_CLOSING,
        
        TCP_SOCKET_CLOSE_WAIT,
        
        TCP_SOCKET_LAST_ACK,
        
        TCP_SOCKET_TIME_WAIT,
        
        TCP_SOCKET_CLOSED
};

struct tcp_operation {
        int result;
        fibril_mutex_t mutex;
        fibril_condvar_t condvar;
};

struct tcp_socket_data {
        tcp_socket_state_t state;
        
        size_t data_fragment_size;
        
        device_id_t device_id;
        
        int backlog;
        
        int listening_socket_id;
        
        size_t treshold;
        size_t window;
        suseconds_t timeout;
        uint32_t acknowledged;
        uint32_t next_incoming;
        uint32_t fin_incoming;
        uint32_t next_outgoing;
        uint32_t last_outgoing;
        uint32_t fin_outgoing;
        
        uint32_t expected;
        
        int expected_count;
        
        packet_t *incoming;
        
        packet_t *outgoing;
        
        void *pseudo_header;
        size_t headerlen;
        struct sockaddr *addr;
        socklen_t addrlen;
        uint16_t dest_port;
        socket_cores_t *local_sockets;
        
        fibril_rwlock_t *local_lock;
        
        tcp_operation_t operation;
        
        int timeout_count;
};

struct tcp_globals {
        int net_phone;
        int ip_phone;
        int icmp_phone;
        int last_used_port;
        socket_ports_t sockets;
        packet_dimensions_t dimensions;
        
        fibril_rwlock_t lock;
};

#endif

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