source: mainline/uspace/srv/net/udp/udp_type.h@ 58e9dec

/*
 * Copyright (c) 2015 Jiri Svoboda
 * 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.
 */

/** @addtogroup udp
 * @{
 */
/** @file UDP type definitions
 */

#ifndef UDP_TYPE_H
#define UDP_TYPE_H

#include <async.h>
#include <fibril.h>
#include <fibril_synch.h>
#include <inet/endpoint.h>
#include <ipc/loc.h>
#include <sys/types.h>
#include <inet/addr.h>

#define UDP_FRAGMENT_SIZE 65535

typedef enum {
        UDP_EOK,
        /* Insufficient resources */
        UDP_ENORES,
        /* Remote endpoint unspecified */
        UDP_EUNSPEC,
        /* No route to destination */
        UDP_ENOROUTE,
        /** Association reset by user */
        UDP_ERESET
} udp_error_t;

typedef enum {
        XF_DUMMY = 0x1
} xflags_t;

/** Unencoded UDP message (datagram) */
typedef struct {
        /** Message data */
        void *data;
        /** Message data size */
        size_t data_size;
} udp_msg_t;

/** Encoded PDU */
typedef struct {
        /** IP link (optional) */
        service_id_t iplink;
        /** Source address */
        inet_addr_t src;
        /** Destination address */
        inet_addr_t dest;
        /** Encoded PDU data including header */
        void *data;
        /** Encoded PDU data size */
        size_t data_size;
} udp_pdu_t;

typedef struct {
        void (*recv_msg)(void *, inet_ep2_t *, udp_msg_t *);
} udp_assoc_cb_t;

/** UDP association
 *
 * This is a rough equivalent of a TCP connection endpoint. It allows
 * sending and receiving UDP datagrams and it is uniquely identified
 * by an endpoint pair.
 */
typedef struct {
        char *name;
        link_t link;

        /** Association identification (endpoint pair) */
        inet_ep2_t ident;

        /** True if association was reset by user */
        bool reset;

        /** True if association was deleted by user */
        bool deleted;

        /** Protects access to association structure */
        fibril_mutex_t lock;
        /** Reference count */
        atomic_t refcnt;

        /** Receive queue */
        list_t rcv_queue;
        /** Receive queue CV. Broadcast when new datagram is inserted */
        fibril_condvar_t rcv_queue_cv;

        udp_assoc_cb_t *cb;
        void *cb_arg;
} udp_assoc_t;

typedef struct {
} udp_assoc_status_t;

typedef struct {
        /** Link to receive queue */
        link_t link;
        /** Endpoint pair */
        inet_ep2_t epp;
        /** Message */
        udp_msg_t *msg;
} udp_rcv_queue_entry_t;

typedef struct udp_cassoc {
        /** Association */
        udp_assoc_t *assoc;
        /** Association ID for the client */
        sysarg_t id;
        /** Client */
        struct udp_client *client;
        link_t lclient;
} udp_cassoc_t;

typedef struct {
        /** Link to receive queue */
        link_t link;
        /** Endpoint pair */
        inet_ep2_t epp;
        /** Message */
        udp_msg_t *msg;
        /** Client association */
        udp_cassoc_t *cassoc;
} udp_crcv_queue_entry_t;

typedef struct udp_client {
        /** Client callback session */
        async_sess_t *sess;
        /** Client assocations */
        list_t cassoc; /* of udp_cassoc_t */
        /** Client receive queue */
        list_t crcv_queue;
} udp_client_t;

#endif

/** @}
 */