| 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 HelenOS service implementation
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| 35 | */
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| 36 |
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| 37 | #include <async.h>
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| 38 | #include <errno.h>
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| 39 | #include <inet/endpoint.h>
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| 40 | #include <io/log.h>
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| 41 | #include <ipc/services.h>
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| 42 | #include <ipc/udp.h>
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| 43 | #include <loc.h>
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| 44 | #include <macros.h>
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| 45 | #include <stdlib.h>
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| 46 |
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| 47 | #include "assoc.h"
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| 48 | #include "msg.h"
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| 49 | #include "service.h"
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| 50 | #include "udp_type.h"
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| 51 |
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| 52 | #define NAME "udp"
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| 53 |
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| 54 | /** Maximum message size */
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| 55 | #define MAX_MSG_SIZE DATA_XFER_LIMIT
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| 56 |
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| 57 | static void udp_cassoc_recv_msg(void *, inet_ep2_t *, udp_msg_t *);
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| 58 |
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| 59 | /** Callbacks to tie us to association layer */
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| 60 | static udp_assoc_cb_t udp_cassoc_cb = {
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| 61 | .recv_msg = udp_cassoc_recv_msg
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| 62 | };
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| 63 |
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| 64 | /** Add message to client receive queue.
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| 65 | *
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| 66 | * @param cassoc Client association
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| 67 | * @param epp Endpoint pair on which message was received
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| 68 | * @param msg Message
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| 69 | *
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| 70 | * @return EOK on success, ENOMEM if out of memory
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| 71 | */
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| 72 | static errno_t udp_cassoc_queue_msg(udp_cassoc_t *cassoc, inet_ep2_t *epp,
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| 73 | udp_msg_t *msg)
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| 74 | {
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| 75 | udp_crcv_queue_entry_t *rqe;
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| 76 |
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| 77 | log_msg(LOG_DEFAULT, LVL_DEBUG, "udp_cassoc_queue_msg(%p, %p, %p)",
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| 78 | cassoc, epp, msg);
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| 79 |
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| 80 | rqe = calloc(1, sizeof(udp_crcv_queue_entry_t));
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| 81 | if (rqe == NULL)
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| 82 | return ENOMEM;
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| 83 |
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| 84 | link_initialize(&rqe->link);
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| 85 | rqe->epp = *epp;
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| 86 | rqe->msg = msg;
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| 87 | rqe->cassoc = cassoc;
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| 88 |
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| 89 | list_append(&rqe->link, &cassoc->client->crcv_queue);
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| 90 | return EOK;
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| 91 | }
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| 92 |
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| 93 | /** Send 'data' event to client.
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| 94 | *
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| 95 | * @param client Client
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| 96 | */
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| 97 | static void udp_ev_data(udp_client_t *client)
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| 98 | {
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| 99 | async_exch_t *exch;
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| 100 |
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| 101 | log_msg(LOG_DEFAULT, LVL_DEBUG, "udp_ev_data()");
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| 102 |
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| 103 | exch = async_exchange_begin(client->sess);
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| 104 | aid_t req = async_send_0(exch, UDP_EV_DATA, NULL);
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| 105 | async_exchange_end(exch);
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| 106 |
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| 107 | async_forget(req);
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| 108 | }
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| 109 |
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| 110 | /** Create client association.
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| 111 | *
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| 112 | * This effectively adds an association into a client's namespace.
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| 113 | *
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| 114 | * @param client Client
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| 115 | * @param assoc Association
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| 116 | * @param rcassoc Place to store pointer to new client association
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| 117 | *
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| 118 | * @return EOK on soccess, ENOMEM if out of memory
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| 119 | */
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| 120 | static errno_t udp_cassoc_create(udp_client_t *client, udp_assoc_t *assoc,
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| 121 | udp_cassoc_t **rcassoc)
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| 122 | {
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| 123 | udp_cassoc_t *cassoc;
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| 124 | sysarg_t id;
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| 125 |
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| 126 | cassoc = calloc(1, sizeof(udp_cassoc_t));
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| 127 | if (cassoc == NULL)
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| 128 | return ENOMEM;
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| 129 |
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| 130 | /* Allocate new ID */
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| 131 | id = 0;
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| 132 | list_foreach (client->cassoc, lclient, udp_cassoc_t, cassoc) {
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| 133 | if (cassoc->id >= id)
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| 134 | id = cassoc->id + 1;
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| 135 | }
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| 136 |
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| 137 | cassoc->id = id;
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| 138 | cassoc->client = client;
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| 139 | cassoc->assoc = assoc;
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| 140 |
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| 141 | list_append(&cassoc->lclient, &client->cassoc);
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| 142 | *rcassoc = cassoc;
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| 143 | return EOK;
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| 144 | }
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| 145 |
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| 146 | /** Destroy client association.
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| 147 | *
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| 148 | * @param cassoc Client association
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| 149 | */
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| 150 | static void udp_cassoc_destroy(udp_cassoc_t *cassoc)
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| 151 | {
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| 152 | list_remove(&cassoc->lclient);
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| 153 | free(cassoc);
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| 154 | }
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| 155 |
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| 156 | /** Get client association by ID.
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| 157 | *
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| 158 | * @param client Client
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| 159 | * @param id Client association ID
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| 160 | * @param rcassoc Place to store pointer to client association
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| 161 | *
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| 162 | * @return EOK on success, ENOENT if no client association with the given ID
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| 163 | * is found.
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| 164 | */
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| 165 | static errno_t udp_cassoc_get(udp_client_t *client, sysarg_t id,
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| 166 | udp_cassoc_t **rcassoc)
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| 167 | {
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| 168 | list_foreach (client->cassoc, lclient, udp_cassoc_t, cassoc) {
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| 169 | if (cassoc->id == id) {
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| 170 | *rcassoc = cassoc;
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| 171 | return EOK;
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| 172 | }
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| 173 | }
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| 174 |
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| 175 | return ENOENT;
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| 176 | }
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| 177 |
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| 178 | /** Message received on client association.
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| 179 | *
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| 180 | * Used as udp_assoc_cb.recv_msg callback.
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| 181 | *
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| 182 | * @param arg Callback argument, client association
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| 183 | * @param epp Endpoint pair where message was received
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| 184 | * @param msg Message
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| 185 | */
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| 186 | static void udp_cassoc_recv_msg(void *arg, inet_ep2_t *epp, udp_msg_t *msg)
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| 187 | {
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| 188 | udp_cassoc_t *cassoc = (udp_cassoc_t *) arg;
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| 189 |
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| 190 | udp_cassoc_queue_msg(cassoc, epp, msg);
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| 191 | udp_ev_data(cassoc->client);
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| 192 | }
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| 193 |
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| 194 | /** Create association.
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| 195 | *
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| 196 | * Handle client request to create association (with parameters unmarshalled).
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| 197 | *
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| 198 | * @param client UDP client
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| 199 | * @param epp Endpoint pair
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| 200 | * @param rassoc_id Place to store ID of new association
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| 201 | *
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| 202 | * @return EOK on success or an error code
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| 203 | */
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| 204 | static errno_t udp_assoc_create_impl(udp_client_t *client, inet_ep2_t *epp,
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| 205 | sysarg_t *rassoc_id)
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| 206 | {
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| 207 | udp_assoc_t *assoc;
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| 208 | udp_cassoc_t *cassoc;
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| 209 | errno_t rc;
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| 210 |
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| 211 | log_msg(LOG_DEFAULT, LVL_DEBUG, "udp_assoc_create_impl");
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| 212 |
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| 213 | assoc = udp_assoc_new(epp, NULL, NULL);
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| 214 | if (assoc == NULL)
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| 215 | return EIO;
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| 216 |
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| 217 | if (epp->local_link != 0)
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| 218 | udp_assoc_set_iplink(assoc, epp->local_link);
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| 219 |
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| 220 | rc = udp_cassoc_create(client, assoc, &cassoc);
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| 221 | if (rc != EOK) {
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| 222 | assert(rc == ENOMEM);
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| 223 | udp_assoc_delete(assoc);
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| 224 | return ENOMEM;
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| 225 | }
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| 226 |
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| 227 | assoc->cb = &udp_cassoc_cb;
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| 228 | assoc->cb_arg = cassoc;
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| 229 |
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| 230 | rc = udp_assoc_add(assoc);
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| 231 | if (rc != EOK) {
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| 232 | udp_cassoc_destroy(cassoc);
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| 233 | udp_assoc_delete(assoc);
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| 234 | return rc;
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| 235 | }
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| 236 |
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| 237 | *rassoc_id = cassoc->id;
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| 238 | return EOK;
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| 239 | }
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| 240 |
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| 241 | /** Destroy association.
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| 242 | *
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| 243 | * Handle client request to destroy association (with parameters unmarshalled).
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| 244 | *
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| 245 | * @param client UDP client
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| 246 | * @param assoc_id Association ID
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| 247 | * @return EOK on success, ENOENT if no such association is found
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| 248 | */
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| 249 | static errno_t udp_assoc_destroy_impl(udp_client_t *client, sysarg_t assoc_id)
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| 250 | {
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| 251 | udp_cassoc_t *cassoc;
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| 252 | errno_t rc;
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| 253 |
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| 254 | rc = udp_cassoc_get(client, assoc_id, &cassoc);
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| 255 | if (rc != EOK) {
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| 256 | assert(rc == ENOENT);
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| 257 | return ENOENT;
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| 258 | }
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| 259 |
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| 260 | udp_assoc_remove(cassoc->assoc);
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| 261 | udp_assoc_reset(cassoc->assoc);
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| 262 | udp_assoc_delete(cassoc->assoc);
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| 263 | udp_cassoc_destroy(cassoc);
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| 264 | return EOK;
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| 265 | }
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| 266 |
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| 267 | /** Set association sending messages with no local address.
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| 268 | *
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| 269 | * Handle client request to set nolocal flag (with parameters unmarshalled).
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| 270 | *
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| 271 | * @param client UDP client
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| 272 | * @param assoc_id Association ID
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| 273 | * @return EOK on success, ENOENT if no such association is found
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| 274 | */
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| 275 | static errno_t udp_assoc_set_nolocal_impl(udp_client_t *client, sysarg_t assoc_id)
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| 276 | {
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| 277 | udp_cassoc_t *cassoc;
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| 278 | errno_t rc;
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| 279 |
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| 280 | rc = udp_cassoc_get(client, assoc_id, &cassoc);
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| 281 | if (rc != EOK) {
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| 282 | assert(rc == ENOENT);
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| 283 | return ENOENT;
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| 284 | }
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| 285 |
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| 286 | log_msg(LOG_DEFAULT, LVL_NOTE, "Setting nolocal to true");
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| 287 | cassoc->assoc->nolocal = true;
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| 288 | return EOK;
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| 289 | }
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| 290 |
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| 291 | /** Send message via association.
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| 292 | *
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| 293 | * Handle client request to send message (with parameters unmarshalled).
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| 294 | *
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| 295 | * @param client UDP client
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| 296 | * @param assoc_id Association ID
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| 297 | * @param dest Destination endpoint or @c NULL to use the default from
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| 298 | * association
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| 299 | * @param data Message data
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| 300 | * @param size Message size
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| 301 | *
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| 302 | * @return EOK on success or an error code
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| 303 | */
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| 304 | static errno_t udp_assoc_send_msg_impl(udp_client_t *client, sysarg_t assoc_id,
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| 305 | inet_ep_t *dest, void *data, size_t size)
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| 306 | {
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| 307 | udp_msg_t msg;
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| 308 | udp_cassoc_t *cassoc;
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| 309 | errno_t rc;
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| 310 |
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| 311 | rc = udp_cassoc_get(client, assoc_id, &cassoc);
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| 312 | if (rc != EOK)
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| 313 | return rc;
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| 314 |
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| 315 | msg.data = data;
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| 316 | msg.data_size = size;
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| 317 | rc = udp_assoc_send(cassoc->assoc, dest, &msg);
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| 318 | if (rc != EOK)
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| 319 | return rc;
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| 320 |
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| 321 | return EOK;
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| 322 | }
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| 323 |
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| 324 | /** Create callback session.
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| 325 | *
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| 326 | * Handle client request to create callback session.
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| 327 | *
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| 328 | * @param client UDP client
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| 329 | * @param icall_handle Async request call handle
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| 330 | * @param icall Async request data
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| 331 | */
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| 332 | static void
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| 333 | udp_callback_create_srv(udp_client_t *client, cap_call_handle_t icall_handle,
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| 334 | ipc_call_t *icall)
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| 335 | {
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| 336 | log_msg(LOG_DEFAULT, LVL_DEBUG, "udp_callback_create_srv()");
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| 337 |
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| 338 | async_sess_t *sess = async_callback_receive(EXCHANGE_SERIALIZE);
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| 339 | if (sess == NULL) {
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| 340 | async_answer_0(icall_handle, ENOMEM);
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| 341 | return;
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| 342 | }
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| 343 |
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| 344 | client->sess = sess;
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| 345 | async_answer_0(icall_handle, EOK);
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| 346 | }
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| 347 |
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| 348 | /** Create association.
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| 349 | *
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| 350 | * Handle client request to create association.
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| 351 | *
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| 352 | * @param client UDP client
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| 353 | * @param icall_handle Async request call handle
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| 354 | * @param icall Async request data
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| 355 | */
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| 356 | static void
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| 357 | udp_assoc_create_srv(udp_client_t *client, cap_call_handle_t icall_handle,
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| 358 | ipc_call_t *icall)
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| 359 | {
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| 360 | cap_call_handle_t chandle;
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| 361 | size_t size;
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| 362 | inet_ep2_t epp;
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| 363 | sysarg_t assoc_id;
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| 364 | errno_t rc;
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| 365 |
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| 366 | log_msg(LOG_DEFAULT, LVL_DEBUG, "udp_assoc_create_srv()");
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| 367 |
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| 368 | if (!async_data_write_receive(&chandle, &size)) {
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| 369 | async_answer_0(chandle, EREFUSED);
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| 370 | async_answer_0(icall_handle, EREFUSED);
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| 371 | return;
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| 372 | }
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| 373 |
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| 374 | if (size != sizeof(inet_ep2_t)) {
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| 375 | async_answer_0(chandle, EINVAL);
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| 376 | async_answer_0(icall_handle, EINVAL);
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| 377 | return;
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| 378 | }
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| 379 |
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| 380 | rc = async_data_write_finalize(chandle, &epp, size);
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| 381 | if (rc != EOK) {
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| 382 | async_answer_0(chandle, rc);
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| 383 | async_answer_0(icall_handle, rc);
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| 384 | return;
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| 385 | }
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| 386 |
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| 387 | rc = udp_assoc_create_impl(client, &epp, &assoc_id);
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| 388 | if (rc != EOK) {
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| 389 | async_answer_0(icall_handle, rc);
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| 390 | return;
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| 391 | }
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| 392 |
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| 393 | async_answer_1(icall_handle, EOK, assoc_id);
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| 394 | }
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| 395 |
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| 396 | /** Destroy association.
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| 397 | *
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| 398 | * Handle client request to destroy association.
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| 399 | *
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| 400 | * @param client UDP client
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| 401 | * @param icall_handle Async request call handle
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| 402 | * @param icall Async request data
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| 403 | */
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| 404 | static void
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| 405 | udp_assoc_destroy_srv(udp_client_t *client, cap_call_handle_t icall_handle,
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| 406 | ipc_call_t *icall)
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| 407 | {
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| 408 | sysarg_t assoc_id;
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| 409 | errno_t rc;
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| 410 |
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| 411 | log_msg(LOG_DEFAULT, LVL_DEBUG, "udp_assoc_destroy_srv()");
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| 412 |
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| 413 | assoc_id = IPC_GET_ARG1(*icall);
|
|---|
| 414 | rc = udp_assoc_destroy_impl(client, assoc_id);
|
|---|
| 415 | async_answer_0(icall_handle, rc);
|
|---|
| 416 | }
|
|---|
| 417 |
|
|---|
| 418 | /** Set association with no local address.
|
|---|
| 419 | *
|
|---|
| 420 | * Handle client request to set no local address flag.
|
|---|
| 421 | *
|
|---|
| 422 | * @param client UDP client
|
|---|
| 423 | * @param icall_handle Async request call handle
|
|---|
| 424 | * @param icall Async request data
|
|---|
| 425 | */
|
|---|
| 426 | static void
|
|---|
| 427 | udp_assoc_set_nolocal_srv(udp_client_t *client, cap_call_handle_t icall_handle,
|
|---|
| 428 | ipc_call_t *icall)
|
|---|
| 429 | {
|
|---|
| 430 | sysarg_t assoc_id;
|
|---|
| 431 | errno_t rc;
|
|---|
| 432 |
|
|---|
| 433 | log_msg(LOG_DEFAULT, LVL_NOTE, "udp_assoc_set_nolocal_srv()");
|
|---|
| 434 |
|
|---|
| 435 | assoc_id = IPC_GET_ARG1(*icall);
|
|---|
| 436 | rc = udp_assoc_set_nolocal_impl(client, assoc_id);
|
|---|
| 437 | async_answer_0(icall_handle, rc);
|
|---|
| 438 | }
|
|---|
| 439 |
|
|---|
| 440 | /** Send message via association.
|
|---|
| 441 | *
|
|---|
| 442 | * Handle client request to send message.
|
|---|
| 443 | *
|
|---|
| 444 | * @param client UDP client
|
|---|
| 445 | * @param icall_handle Async request call handle
|
|---|
| 446 | * @param icall Async request data
|
|---|
| 447 | */
|
|---|
| 448 | static void
|
|---|
| 449 | udp_assoc_send_msg_srv(udp_client_t *client, cap_call_handle_t icall_handle,
|
|---|
| 450 | ipc_call_t *icall)
|
|---|
| 451 | {
|
|---|
| 452 | cap_call_handle_t chandle;
|
|---|
| 453 | size_t size;
|
|---|
| 454 | inet_ep_t dest;
|
|---|
| 455 | sysarg_t assoc_id;
|
|---|
| 456 | void *data;
|
|---|
| 457 | errno_t rc;
|
|---|
| 458 |
|
|---|
| 459 | log_msg(LOG_DEFAULT, LVL_DEBUG, "udp_assoc_send_msg_srv()");
|
|---|
| 460 |
|
|---|
| 461 | /* Receive dest */
|
|---|
| 462 |
|
|---|
| 463 | if (!async_data_write_receive(&chandle, &size)) {
|
|---|
| 464 | async_answer_0(chandle, EREFUSED);
|
|---|
| 465 | async_answer_0(icall_handle, EREFUSED);
|
|---|
| 466 | return;
|
|---|
| 467 | }
|
|---|
| 468 |
|
|---|
| 469 | if (size != sizeof(inet_ep_t)) {
|
|---|
| 470 | async_answer_0(chandle, EINVAL);
|
|---|
| 471 | async_answer_0(icall_handle, EINVAL);
|
|---|
| 472 | return;
|
|---|
| 473 | }
|
|---|
| 474 |
|
|---|
| 475 | rc = async_data_write_finalize(chandle, &dest, size);
|
|---|
| 476 | if (rc != EOK) {
|
|---|
| 477 | async_answer_0(chandle, rc);
|
|---|
| 478 | async_answer_0(icall_handle, rc);
|
|---|
| 479 | return;
|
|---|
| 480 | }
|
|---|
| 481 |
|
|---|
| 482 | /* Receive message data */
|
|---|
| 483 |
|
|---|
| 484 | if (!async_data_write_receive(&chandle, &size)) {
|
|---|
| 485 | async_answer_0(chandle, EREFUSED);
|
|---|
| 486 | async_answer_0(icall_handle, EREFUSED);
|
|---|
| 487 | return;
|
|---|
| 488 | }
|
|---|
| 489 |
|
|---|
| 490 | if (size > MAX_MSG_SIZE) {
|
|---|
| 491 | async_answer_0(chandle, EINVAL);
|
|---|
| 492 | async_answer_0(icall_handle, EINVAL);
|
|---|
| 493 | return;
|
|---|
| 494 | }
|
|---|
| 495 |
|
|---|
| 496 | data = malloc(size);
|
|---|
| 497 | if (data == NULL) {
|
|---|
| 498 | async_answer_0(chandle, ENOMEM);
|
|---|
| 499 | async_answer_0(icall_handle, ENOMEM);
|
|---|
| 500 | }
|
|---|
| 501 |
|
|---|
| 502 | rc = async_data_write_finalize(chandle, data, size);
|
|---|
| 503 | if (rc != EOK) {
|
|---|
| 504 | async_answer_0(chandle, rc);
|
|---|
| 505 | async_answer_0(icall_handle, rc);
|
|---|
| 506 | free(data);
|
|---|
| 507 | return;
|
|---|
| 508 | }
|
|---|
| 509 |
|
|---|
| 510 | assoc_id = IPC_GET_ARG1(*icall);
|
|---|
| 511 |
|
|---|
| 512 | rc = udp_assoc_send_msg_impl(client, assoc_id, &dest, data, size);
|
|---|
| 513 | if (rc != EOK) {
|
|---|
| 514 | async_answer_0(icall_handle, rc);
|
|---|
| 515 | free(data);
|
|---|
| 516 | return;
|
|---|
| 517 | }
|
|---|
| 518 |
|
|---|
| 519 | async_answer_0(icall_handle, EOK);
|
|---|
| 520 | free(data);
|
|---|
| 521 | }
|
|---|
| 522 |
|
|---|
| 523 | /** Get next received message.
|
|---|
| 524 | *
|
|---|
| 525 | * @param client UDP Client
|
|---|
| 526 | * @return Pointer to queue entry for next received message
|
|---|
| 527 | */
|
|---|
| 528 | static udp_crcv_queue_entry_t *udp_rmsg_get_next(udp_client_t *client)
|
|---|
| 529 | {
|
|---|
| 530 | link_t *link;
|
|---|
| 531 |
|
|---|
| 532 | link = list_first(&client->crcv_queue);
|
|---|
| 533 | if (link == NULL)
|
|---|
| 534 | return NULL;
|
|---|
| 535 |
|
|---|
| 536 | return list_get_instance(link, udp_crcv_queue_entry_t, link);
|
|---|
| 537 | }
|
|---|
| 538 |
|
|---|
| 539 | /** Get info on first received message.
|
|---|
| 540 | *
|
|---|
| 541 | * Handle client request to get information on received message.
|
|---|
| 542 | *
|
|---|
| 543 | * @param client UDP client
|
|---|
| 544 | * @param icall_handle Async request call handle
|
|---|
| 545 | * @param icall Async request data
|
|---|
| 546 | */
|
|---|
| 547 | static void
|
|---|
| 548 | udp_rmsg_info_srv(udp_client_t *client, cap_call_handle_t icall_handle,
|
|---|
| 549 | ipc_call_t *icall)
|
|---|
| 550 | {
|
|---|
| 551 | cap_call_handle_t chandle;
|
|---|
| 552 | size_t size;
|
|---|
| 553 | udp_crcv_queue_entry_t *enext;
|
|---|
| 554 | sysarg_t assoc_id;
|
|---|
| 555 | errno_t rc;
|
|---|
| 556 |
|
|---|
| 557 | log_msg(LOG_DEFAULT, LVL_DEBUG, "udp_rmsg_info_srv()");
|
|---|
| 558 | enext = udp_rmsg_get_next(client);
|
|---|
| 559 |
|
|---|
| 560 | if (!async_data_read_receive(&chandle, &size)) {
|
|---|
| 561 | async_answer_0(chandle, EREFUSED);
|
|---|
| 562 | async_answer_0(icall_handle, EREFUSED);
|
|---|
| 563 | return;
|
|---|
| 564 | }
|
|---|
| 565 |
|
|---|
| 566 | if (enext == NULL) {
|
|---|
| 567 | async_answer_0(chandle, ENOENT);
|
|---|
| 568 | async_answer_0(icall_handle, ENOENT);
|
|---|
| 569 | return;
|
|---|
| 570 | }
|
|---|
| 571 |
|
|---|
| 572 | rc = async_data_read_finalize(chandle, &enext->epp.remote,
|
|---|
| 573 | max(size, (size_t)sizeof(inet_ep_t)));
|
|---|
| 574 | if (rc != EOK) {
|
|---|
| 575 | async_answer_0(icall_handle, rc);
|
|---|
| 576 | return;
|
|---|
| 577 | }
|
|---|
| 578 |
|
|---|
| 579 | assoc_id = enext->cassoc->id;
|
|---|
| 580 | size = enext->msg->data_size;
|
|---|
| 581 |
|
|---|
| 582 | log_msg(LOG_DEFAULT, LVL_DEBUG, "udp_rmsg_info_srv(): assoc_id=%zu, "
|
|---|
| 583 | "size=%zu", assoc_id, size);
|
|---|
| 584 | async_answer_2(icall_handle, EOK, assoc_id, size);
|
|---|
| 585 | }
|
|---|
| 586 |
|
|---|
| 587 | /** Read data from first received message.
|
|---|
| 588 | *
|
|---|
| 589 | * Handle client request to read data from first received message.
|
|---|
| 590 | *
|
|---|
| 591 | * @param client UDP client
|
|---|
| 592 | * @param icall_handle Async request call handle
|
|---|
| 593 | * @param icall Async request data
|
|---|
| 594 | */
|
|---|
| 595 | static void
|
|---|
| 596 | udp_rmsg_read_srv(udp_client_t *client, cap_call_handle_t icall_handle,
|
|---|
| 597 | ipc_call_t *icall)
|
|---|
| 598 | {
|
|---|
| 599 | cap_call_handle_t chandle;
|
|---|
| 600 | size_t msg_size;
|
|---|
| 601 | udp_crcv_queue_entry_t *enext;
|
|---|
| 602 | void *data;
|
|---|
| 603 | size_t size;
|
|---|
| 604 | size_t off;
|
|---|
| 605 | errno_t rc;
|
|---|
| 606 |
|
|---|
| 607 | log_msg(LOG_DEFAULT, LVL_DEBUG, "udp_rmsg_read_srv()");
|
|---|
| 608 | off = IPC_GET_ARG1(*icall);
|
|---|
| 609 |
|
|---|
| 610 | enext = udp_rmsg_get_next(client);
|
|---|
| 611 |
|
|---|
| 612 | if (!async_data_read_receive(&chandle, &size)) {
|
|---|
| 613 | async_answer_0(chandle, EREFUSED);
|
|---|
| 614 | async_answer_0(icall_handle, EREFUSED);
|
|---|
| 615 | return;
|
|---|
| 616 | }
|
|---|
| 617 |
|
|---|
| 618 | if (enext == NULL) {
|
|---|
| 619 | async_answer_0(chandle, ENOENT);
|
|---|
| 620 | async_answer_0(icall_handle, ENOENT);
|
|---|
| 621 | return;
|
|---|
| 622 | }
|
|---|
| 623 |
|
|---|
| 624 | data = enext->msg->data + off;
|
|---|
| 625 | msg_size = enext->msg->data_size;
|
|---|
| 626 |
|
|---|
| 627 | if (off > msg_size) {
|
|---|
| 628 | async_answer_0(chandle, EINVAL);
|
|---|
| 629 | async_answer_0(icall_handle, EINVAL);
|
|---|
| 630 | return;
|
|---|
| 631 | }
|
|---|
| 632 |
|
|---|
| 633 | rc = async_data_read_finalize(chandle, data, min(msg_size - off, size));
|
|---|
| 634 | if (rc != EOK) {
|
|---|
| 635 | async_answer_0(icall_handle, rc);
|
|---|
| 636 | return;
|
|---|
| 637 | }
|
|---|
| 638 |
|
|---|
| 639 | async_answer_0(icall_handle, EOK);
|
|---|
| 640 | log_msg(LOG_DEFAULT, LVL_DEBUG, "udp_rmsg_read_srv(): OK");
|
|---|
| 641 | }
|
|---|
| 642 |
|
|---|
| 643 | /** Discard first received message.
|
|---|
| 644 | *
|
|---|
| 645 | * Handle client request to discard first received message, advancing
|
|---|
| 646 | * to the next one.
|
|---|
| 647 | *
|
|---|
| 648 | * @param client UDP client
|
|---|
| 649 | * @param icall_handle Async request call handle
|
|---|
| 650 | * @param icall Async request data
|
|---|
| 651 | */
|
|---|
| 652 | static void
|
|---|
| 653 | udp_rmsg_discard_srv(udp_client_t *client, cap_call_handle_t icall_handle,
|
|---|
| 654 | ipc_call_t *icall)
|
|---|
| 655 | {
|
|---|
| 656 | udp_crcv_queue_entry_t *enext;
|
|---|
| 657 |
|
|---|
| 658 | log_msg(LOG_DEFAULT, LVL_DEBUG, "udp_rmsg_discard_srv()");
|
|---|
| 659 |
|
|---|
| 660 | enext = udp_rmsg_get_next(client);
|
|---|
| 661 | if (enext == NULL) {
|
|---|
| 662 | log_msg(LOG_DEFAULT, LVL_DEBUG, "usg_rmsg_discard_srv: enext==NULL");
|
|---|
| 663 | async_answer_0(icall_handle, ENOENT);
|
|---|
| 664 | return;
|
|---|
| 665 | }
|
|---|
| 666 |
|
|---|
| 667 | list_remove(&enext->link);
|
|---|
| 668 | udp_msg_delete(enext->msg);
|
|---|
| 669 | free(enext);
|
|---|
| 670 | async_answer_0(icall_handle, EOK);
|
|---|
| 671 | }
|
|---|
| 672 |
|
|---|
| 673 | /** Handle UDP client connection.
|
|---|
| 674 | *
|
|---|
| 675 | * @param icall_handle Connect call handle
|
|---|
| 676 | * @param icall Connect call data
|
|---|
| 677 | * @param arg Connection argument
|
|---|
| 678 | */
|
|---|
| 679 | static void udp_client_conn(cap_call_handle_t icall_handle, ipc_call_t *icall,
|
|---|
| 680 | void *arg)
|
|---|
| 681 | {
|
|---|
| 682 | udp_client_t client;
|
|---|
| 683 | unsigned long n;
|
|---|
| 684 |
|
|---|
| 685 | /* Accept the connection */
|
|---|
| 686 | async_answer_0(icall_handle, EOK);
|
|---|
| 687 |
|
|---|
| 688 | log_msg(LOG_DEFAULT, LVL_DEBUG, "udp_client_conn()");
|
|---|
| 689 |
|
|---|
| 690 | client.sess = NULL;
|
|---|
| 691 | list_initialize(&client.cassoc);
|
|---|
| 692 | list_initialize(&client.crcv_queue);
|
|---|
| 693 |
|
|---|
| 694 | while (true) {
|
|---|
| 695 | log_msg(LOG_DEFAULT, LVL_DEBUG, "udp_client_conn: wait req");
|
|---|
| 696 | ipc_call_t call;
|
|---|
| 697 | cap_call_handle_t chandle = async_get_call(&call);
|
|---|
| 698 | sysarg_t method = IPC_GET_IMETHOD(call);
|
|---|
| 699 |
|
|---|
| 700 | log_msg(LOG_DEFAULT, LVL_DEBUG, "udp_client_conn: method=%d",
|
|---|
| 701 | (int)method);
|
|---|
| 702 | if (!method) {
|
|---|
| 703 | /* The other side has hung up */
|
|---|
| 704 | async_answer_0(chandle, EOK);
|
|---|
| 705 | break;
|
|---|
| 706 | }
|
|---|
| 707 |
|
|---|
| 708 | switch (method) {
|
|---|
| 709 | case UDP_CALLBACK_CREATE:
|
|---|
| 710 | udp_callback_create_srv(&client, chandle, &call);
|
|---|
| 711 | break;
|
|---|
| 712 | case UDP_ASSOC_CREATE:
|
|---|
| 713 | udp_assoc_create_srv(&client, chandle, &call);
|
|---|
| 714 | break;
|
|---|
| 715 | case UDP_ASSOC_DESTROY:
|
|---|
| 716 | udp_assoc_destroy_srv(&client, chandle, &call);
|
|---|
| 717 | break;
|
|---|
| 718 | case UDP_ASSOC_SET_NOLOCAL:
|
|---|
| 719 | udp_assoc_set_nolocal_srv(&client, chandle, &call);
|
|---|
| 720 | break;
|
|---|
| 721 | case UDP_ASSOC_SEND_MSG:
|
|---|
| 722 | udp_assoc_send_msg_srv(&client, chandle, &call);
|
|---|
| 723 | break;
|
|---|
| 724 | case UDP_RMSG_INFO:
|
|---|
| 725 | udp_rmsg_info_srv(&client, chandle, &call);
|
|---|
| 726 | break;
|
|---|
| 727 | case UDP_RMSG_READ:
|
|---|
| 728 | udp_rmsg_read_srv(&client, chandle, &call);
|
|---|
| 729 | break;
|
|---|
| 730 | case UDP_RMSG_DISCARD:
|
|---|
| 731 | udp_rmsg_discard_srv(&client, chandle, &call);
|
|---|
| 732 | break;
|
|---|
| 733 | default:
|
|---|
| 734 | async_answer_0(chandle, ENOTSUP);
|
|---|
| 735 | break;
|
|---|
| 736 | }
|
|---|
| 737 | }
|
|---|
| 738 |
|
|---|
| 739 | log_msg(LOG_DEFAULT, LVL_DEBUG, "udp_client_conn: terminated");
|
|---|
| 740 |
|
|---|
| 741 | n = list_count(&client.cassoc);
|
|---|
| 742 | if (n != 0) {
|
|---|
| 743 | log_msg(LOG_DEFAULT, LVL_WARN, "udp_client_conn: "
|
|---|
| 744 | "Client with %lu active associations closed session.", n);
|
|---|
| 745 | /* XXX Clean up */
|
|---|
| 746 | }
|
|---|
| 747 |
|
|---|
| 748 | /* XXX Clean up client receive queue */
|
|---|
| 749 |
|
|---|
| 750 | if (client.sess != NULL)
|
|---|
| 751 | async_hangup(client.sess);
|
|---|
| 752 | }
|
|---|
| 753 |
|
|---|
| 754 | /** Initialize UDP service.
|
|---|
| 755 | *
|
|---|
| 756 | * @return EOK on success or an error code.
|
|---|
| 757 | */
|
|---|
| 758 | errno_t udp_service_init(void)
|
|---|
| 759 | {
|
|---|
| 760 | errno_t rc;
|
|---|
| 761 | service_id_t sid;
|
|---|
| 762 |
|
|---|
| 763 | async_set_fallback_port_handler(udp_client_conn, NULL);
|
|---|
| 764 |
|
|---|
| 765 | rc = loc_server_register(NAME);
|
|---|
| 766 | if (rc != EOK) {
|
|---|
| 767 | log_msg(LOG_DEFAULT, LVL_ERROR, "Failed registering server.");
|
|---|
| 768 | return EIO;
|
|---|
| 769 | }
|
|---|
| 770 |
|
|---|
| 771 | rc = loc_service_register(SERVICE_NAME_UDP, &sid);
|
|---|
| 772 | if (rc != EOK) {
|
|---|
| 773 | log_msg(LOG_DEFAULT, LVL_ERROR, "Failed registering service.");
|
|---|
| 774 | return EIO;
|
|---|
| 775 | }
|
|---|
| 776 |
|
|---|
| 777 | return EOK;
|
|---|
| 778 | }
|
|---|
| 779 |
|
|---|
| 780 | /**
|
|---|
| 781 | * @}
|
|---|
| 782 | */
|
|---|