| 1 | /*
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| 2 | * Copyright (c) 2015 Jiri Svoboda
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup udp
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| 30 | * @{
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| 31 | */
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| 32 |
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| 33 | /**
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| 34 | * @file UDP client associations
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| 35 | *
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| 36 | * Ties UDP associations into the namespace of a client
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| 37 | */
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| 38 |
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| 39 | #include <errno.h>
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| 40 | #include <inet/endpoint.h>
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| 41 | #include <io/log.h>
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| 42 | #include <stdlib.h>
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| 43 |
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| 44 | #include "cassoc.h"
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| 45 | #include "udp_type.h"
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| 46 |
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| 47 | /** Add message to client receive queue.
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| 48 | *
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| 49 | * @param cassoc Client association
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| 50 | * @param epp Endpoint pair on which message was received
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| 51 | * @param msg Message
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| 52 | *
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| 53 | * @return EOK on success, ENOMEM if out of memory
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| 54 | */
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| 55 | errno_t udp_cassoc_queue_msg(udp_cassoc_t *cassoc, inet_ep2_t *epp,
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| 56 | udp_msg_t *msg)
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| 57 | {
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| 58 | udp_crcv_queue_entry_t *rqe;
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| 59 |
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| 60 | log_msg(LOG_DEFAULT, LVL_DEBUG, "udp_cassoc_queue_msg(%p, %p, %p)",
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| 61 | cassoc, epp, msg);
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| 62 |
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| 63 | rqe = calloc(1, sizeof(udp_crcv_queue_entry_t));
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| 64 | if (rqe == NULL)
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| 65 | return ENOMEM;
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| 66 |
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| 67 | link_initialize(&rqe->link);
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| 68 | rqe->epp = *epp;
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| 69 | rqe->msg = msg;
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| 70 | rqe->cassoc = cassoc;
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| 71 |
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| 72 | list_append(&rqe->link, &cassoc->client->crcv_queue);
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| 73 | return EOK;
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| 74 | }
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| 75 |
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| 76 | /** Create client association.
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| 77 | *
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| 78 | * This effectively adds an association into a client's namespace.
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| 79 | *
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| 80 | * @param client Client
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| 81 | * @param assoc Association
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| 82 | * @param rcassoc Place to store pointer to new client association
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| 83 | *
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| 84 | * @return EOK on soccess, ENOMEM if out of memory
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| 85 | */
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| 86 | errno_t udp_cassoc_create(udp_client_t *client, udp_assoc_t *assoc,
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| 87 | udp_cassoc_t **rcassoc)
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| 88 | {
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| 89 | udp_cassoc_t *cassoc;
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| 90 | sysarg_t id;
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| 91 |
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| 92 | cassoc = calloc(1, sizeof(udp_cassoc_t));
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| 93 | if (cassoc == NULL)
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| 94 | return ENOMEM;
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| 95 |
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| 96 | /* Allocate new ID */
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| 97 | id = 0;
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| 98 | list_foreach (client->cassoc, lclient, udp_cassoc_t, cassoc) {
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| 99 | if (cassoc->id >= id)
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| 100 | id = cassoc->id + 1;
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| 101 | }
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| 102 |
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| 103 | cassoc->id = id;
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| 104 | cassoc->client = client;
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| 105 | cassoc->assoc = assoc;
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| 106 |
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| 107 | list_append(&cassoc->lclient, &client->cassoc);
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| 108 | *rcassoc = cassoc;
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| 109 | return EOK;
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| 110 | }
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| 111 |
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| 112 | /** Destroy client association.
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| 113 | *
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| 114 | * @param cassoc Client association
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| 115 | */
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| 116 | void udp_cassoc_destroy(udp_cassoc_t *cassoc)
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| 117 | {
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| 118 | list_remove(&cassoc->lclient);
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| 119 | free(cassoc);
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| 120 | }
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| 121 |
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| 122 | /** Get client association by ID.
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| 123 | *
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| 124 | * @param client Client
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| 125 | * @param id Client association ID
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| 126 | * @param rcassoc Place to store pointer to client association
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| 127 | *
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| 128 | * @return EOK on success, ENOENT if no client association with the given ID
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| 129 | * is found.
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| 130 | */
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| 131 | errno_t udp_cassoc_get(udp_client_t *client, sysarg_t id,
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| 132 | udp_cassoc_t **rcassoc)
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| 133 | {
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| 134 | list_foreach (client->cassoc, lclient, udp_cassoc_t, cassoc) {
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| 135 | if (cassoc->id == id) {
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| 136 | *rcassoc = cassoc;
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| 137 | return EOK;
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| 138 | }
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| 139 | }
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| 140 |
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| 141 | return ENOENT;
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| 142 | }
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| 143 |
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| 144 | /**
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| 145 | * @}
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| 146 | */
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