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 libc
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30 | * @{
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31 | */
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32 | /** @file TCP API
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33 | */
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34 |
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35 | #include <errno.h>
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36 | #include <inet/endpoint.h>
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37 | #include <inet/tcp.h>
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38 | #include <ipc/services.h>
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39 | #include <ipc/tcp.h>
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40 | #include <stdlib.h>
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41 |
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42 | #include <stdio.h>
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43 |
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44 | static void tcp_cb_conn(ipc_callid_t, ipc_call_t *, void *);
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45 |
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46 | static int tcp_callback_create(tcp_t *tcp)
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47 | {
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48 | async_exch_t *exch = async_exchange_begin(tcp->sess);
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49 |
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50 | printf("tcp_callback_create()\n");
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51 |
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52 | aid_t req = async_send_0(exch, TCP_CALLBACK_CREATE, NULL);
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53 | int rc = async_connect_to_me(exch, 0, 0, 0, tcp_cb_conn, tcp);
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54 | async_exchange_end(exch);
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55 |
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56 | if (rc != EOK)
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57 | return rc;
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58 |
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59 | sysarg_t retval;
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60 | async_wait_for(req, &retval);
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61 |
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62 | return retval;
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63 | }
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64 |
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65 | int tcp_create(tcp_t **rtcp)
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66 | {
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67 | tcp_t *tcp;
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68 | service_id_t tcp_svcid;
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69 | int rc;
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70 |
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71 | printf("tcp_create()\n");
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72 |
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73 | tcp = calloc(1, sizeof(tcp_t));
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74 | if (tcp == NULL) {
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75 | rc = ENOMEM;
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76 | goto error;
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77 | }
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78 |
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79 | list_initialize(&tcp->conn);
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80 | list_initialize(&tcp->listener);
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81 |
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82 | rc = loc_service_get_id(SERVICE_NAME_TCP, &tcp_svcid,
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83 | IPC_FLAG_BLOCKING);
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84 | if (rc != EOK) {
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85 | rc = EIO;
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86 | goto error;
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87 | }
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88 |
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89 | tcp->sess = loc_service_connect(EXCHANGE_SERIALIZE, tcp_svcid,
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90 | IPC_FLAG_BLOCKING);
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91 | if (tcp->sess == NULL) {
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92 | rc = EIO;
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93 | goto error;
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94 | }
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95 |
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96 | rc = tcp_callback_create(tcp);
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97 | if (rc != EOK) {
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98 | rc = EIO;
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99 | goto error;
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100 | }
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101 |
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102 | *rtcp = tcp;
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103 | return EOK;
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104 | error:
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105 | free(tcp);
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106 | return rc;
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107 | }
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108 |
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109 | void tcp_destroy(tcp_t *tcp)
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110 | {
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111 | if (tcp == NULL)
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112 | return;
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113 |
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114 | async_hangup(tcp->sess);
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115 | free(tcp);
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116 | }
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117 |
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118 | int tcp_conn_create(tcp_t *tcp, inet_ep2_t *epp, tcp_cb_t *cb, void *arg,
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119 | tcp_conn_t **rconn)
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120 | {
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121 | async_exch_t *exch;
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122 | tcp_conn_t *conn;
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123 | ipc_call_t answer;
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124 |
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125 | printf("tcp_conn_create()\n");
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126 |
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127 | conn = calloc(1, sizeof(tcp_conn_t));
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128 | if (conn == NULL)
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129 | return ENOMEM;
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130 |
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131 | conn->data_avail = false;
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132 | fibril_mutex_initialize(&conn->lock);
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133 | fibril_condvar_initialize(&conn->cv);
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134 |
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135 | exch = async_exchange_begin(tcp->sess);
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136 | aid_t req = async_send_0(exch, TCP_CONN_CREATE, &answer);
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137 | sysarg_t rc = async_data_write_start(exch, (void *)epp,
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138 | sizeof(inet_ep2_t));
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139 | async_exchange_end(exch);
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140 |
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141 | if (rc != EOK) {
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142 | sysarg_t rc_orig;
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143 | async_wait_for(req, &rc_orig);
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144 | if (rc_orig != EOK)
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145 | rc = rc_orig;
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146 | goto error;
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147 | }
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148 |
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149 | async_wait_for(req, &rc);
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150 | if (rc != EOK)
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151 | goto error;
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152 |
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153 | conn->tcp = tcp;
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154 | conn->id = IPC_GET_ARG1(answer);
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155 | conn->cb = cb;
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156 | conn->cb_arg = arg;
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157 |
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158 | list_append(&conn->ltcp, &tcp->conn);
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159 | *rconn = conn;
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160 |
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161 | return EOK;
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162 | error:
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163 | free(conn);
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164 | return (int) rc;
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165 | }
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166 |
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167 | void tcp_conn_destroy(tcp_conn_t *conn)
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168 | {
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169 | async_exch_t *exch;
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170 |
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171 | printf("tcp_conn_destroy()\n");
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172 |
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173 | if (conn == NULL)
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174 | return;
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175 |
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176 | list_remove(&conn->ltcp);
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177 |
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178 | exch = async_exchange_begin(conn->tcp->sess);
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179 | sysarg_t rc = async_req_1_0(exch, TCP_CONN_DESTROY, conn->id);
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180 | async_exchange_end(exch);
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181 |
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182 | free(conn);
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183 | (void) rc;
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184 | }
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185 |
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186 | static int tcp_conn_get(tcp_t *tcp, sysarg_t id, tcp_conn_t **rconn)
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187 | {
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188 | list_foreach(tcp->conn, ltcp, tcp_conn_t, conn) {
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189 | if (conn->id == id) {
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190 | *rconn = conn;
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191 | return EOK;
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192 | }
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193 | }
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194 |
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195 | return EINVAL;
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196 | }
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197 |
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198 | void *tcp_conn_userptr(tcp_conn_t *conn)
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199 | {
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200 | return conn->cb_arg;
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201 | }
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202 |
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203 | int tcp_listener_create(tcp_t *tcp, inet_ep_t *ep, tcp_listen_cb_t *lcb,
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204 | void *larg, tcp_cb_t *cb, void *arg, tcp_listener_t **rlst)
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205 | {
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206 | async_exch_t *exch;
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207 | tcp_listener_t *lst;
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208 | ipc_call_t answer;
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209 |
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210 | printf("tcp_listener_create()\n");
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211 |
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212 | lst = calloc(1, sizeof(tcp_listener_t));
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213 | if (lst == NULL)
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214 | return ENOMEM;
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215 |
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216 | exch = async_exchange_begin(tcp->sess);
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217 | aid_t req = async_send_0(exch, TCP_LISTENER_CREATE, &answer);
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218 | sysarg_t rc = async_data_write_start(exch, (void *)ep,
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219 | sizeof(inet_ep_t));
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220 | async_exchange_end(exch);
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221 |
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222 | if (rc != EOK) {
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223 | sysarg_t rc_orig;
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224 | async_wait_for(req, &rc_orig);
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225 | if (rc_orig != EOK)
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226 | rc = rc_orig;
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227 | goto error;
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228 | }
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229 |
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230 | async_wait_for(req, &rc);
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231 | if (rc != EOK)
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232 | goto error;
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233 |
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234 | lst->tcp = tcp;
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235 | lst->id = IPC_GET_ARG1(answer);
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236 | lst->lcb = lcb;
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237 | lst->lcb_arg = larg;
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238 | lst->cb = cb;
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239 | lst->cb_arg = arg;
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240 |
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241 | list_append(&lst->ltcp, &tcp->listener);
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242 | *rlst = lst;
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243 |
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244 | return EOK;
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245 | error:
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246 | free(lst);
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247 | return (int) rc;
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248 | }
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249 |
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250 | void tcp_listener_destroy(tcp_listener_t *lst)
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251 | {
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252 | async_exch_t *exch;
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253 |
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254 | printf("tcp_listener_destroy()\n");
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255 |
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256 | if (lst == NULL)
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257 | return;
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258 |
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259 | list_remove(&lst->ltcp);
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260 |
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261 | exch = async_exchange_begin(lst->tcp->sess);
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262 | sysarg_t rc = async_req_1_0(exch, TCP_LISTENER_DESTROY, lst->id);
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263 | async_exchange_end(exch);
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264 |
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265 | free(lst);
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266 | (void) rc;
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267 | }
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268 |
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269 | void *tcp_listener_userptr(tcp_listener_t *lst)
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270 | {
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271 | return lst->lcb_arg;
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272 | }
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273 |
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274 | int tcp_conn_wait_connected(tcp_conn_t *conn)
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275 | {
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276 | async_usleep(1000 * 1000);
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277 | return 0;
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278 | }
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279 |
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280 | int tcp_conn_send(tcp_conn_t *conn, const void *data, size_t bytes)
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281 | {
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282 | async_exch_t *exch;
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283 | sysarg_t rc;
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284 |
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285 | printf("tcp_conn_send()\n");
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286 |
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287 | exch = async_exchange_begin(conn->tcp->sess);
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288 | aid_t req = async_send_1(exch, TCP_CONN_SEND, conn->id, NULL);
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289 |
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290 | rc = async_data_write_start(exch, data, bytes);
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291 | if (rc != EOK) {
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292 | async_forget(req);
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293 | return rc;
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294 | }
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295 |
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296 | async_exchange_end(exch);
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297 |
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298 | if (rc != EOK) {
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299 | async_forget(req);
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300 | return rc;
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301 | }
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302 |
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303 | async_wait_for(req, &rc);
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304 | return rc;
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305 | }
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306 |
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307 |
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308 | int tcp_conn_send_fin(tcp_conn_t *conn)
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309 | {
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310 | async_exch_t *exch;
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311 |
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312 | printf("tcp_conn_send_fin()\n");
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313 |
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314 | exch = async_exchange_begin(conn->tcp->sess);
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315 | sysarg_t rc = async_req_1_0(exch, TCP_CONN_SEND_FIN, conn->id);
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316 | async_exchange_end(exch);
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317 |
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318 | return rc;
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319 | }
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320 |
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321 | int tcp_conn_push(tcp_conn_t *conn)
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322 | {
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323 | async_exch_t *exch;
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324 |
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325 | printf("tcp_conn_push()\n");
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326 |
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327 | exch = async_exchange_begin(conn->tcp->sess);
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328 | sysarg_t rc = async_req_1_0(exch, TCP_CONN_PUSH, conn->id);
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329 | async_exchange_end(exch);
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330 |
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331 | return rc;
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332 | }
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333 |
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334 | int tcp_conn_reset(tcp_conn_t *conn)
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335 | {
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336 | async_exch_t *exch;
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337 |
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338 | printf("tcp_conn_reset()\n");
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339 |
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340 | exch = async_exchange_begin(conn->tcp->sess);
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341 | sysarg_t rc = async_req_1_0(exch, TCP_CONN_RESET, conn->id);
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342 | async_exchange_end(exch);
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343 |
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344 | return rc;
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345 | }
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346 |
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347 | int tcp_conn_recv(tcp_conn_t *conn, void *buf, size_t bsize, size_t *nrecv)
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348 | {
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349 | async_exch_t *exch;
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350 | ipc_call_t answer;
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351 |
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352 | printf("tcp_conn_recv() bsize=%zu\n", bsize);
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353 |
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354 | fibril_mutex_lock(&conn->lock);
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355 | if (!conn->data_avail) {
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356 | printf("returning EAGAIN\n");
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357 | fibril_mutex_unlock(&conn->lock);
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358 | return EAGAIN;
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359 | }
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360 |
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361 | exch = async_exchange_begin(conn->tcp->sess);
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362 | aid_t req = async_send_1(exch, TCP_CONN_RECV, conn->id, &answer);
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363 | int rc = async_data_read_start(exch, buf, bsize);
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364 | async_exchange_end(exch);
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365 |
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366 | if (rc != EOK) {
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367 | printf("got rc = %d\n", rc);
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368 | async_forget(req);
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369 | fibril_mutex_unlock(&conn->lock);
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370 | return rc;
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371 | }
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372 |
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373 | sysarg_t retval;
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374 | async_wait_for(req, &retval);
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375 | if (retval != EOK) {
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376 | printf("got rc = %d\n", rc);
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377 | fibril_mutex_unlock(&conn->lock);
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378 | return retval;
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379 | }
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380 |
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381 | *nrecv = IPC_GET_ARG1(answer);
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382 | fibril_mutex_unlock(&conn->lock);
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383 | return EOK;
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384 | }
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385 |
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386 | int tcp_conn_recv_wait(tcp_conn_t *conn, void *buf, size_t bsize, size_t *nrecv)
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387 | {
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388 | async_exch_t *exch;
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389 | ipc_call_t answer;
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390 |
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391 | printf("tcp_conn_recv_wait() bsize=%zu\n", bsize);
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392 | again:
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393 | fibril_mutex_lock(&conn->lock);
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394 | while (!conn->data_avail) {
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395 | printf("wait for data to be avail\n");
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396 | fibril_condvar_wait(&conn->cv, &conn->lock);
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397 | }
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398 |
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399 | printf("tcp_conn_recv_wait - get data\n");
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400 | exch = async_exchange_begin(conn->tcp->sess);
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401 | aid_t req = async_send_1(exch, TCP_CONN_RECV_WAIT, conn->id, &answer);
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402 | int rc = async_data_read_start(exch, buf, bsize);
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403 | printf("tcp_conn_recv_wait - rc = %d\n", rc);
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404 | async_exchange_end(exch);
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405 |
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406 | if (rc != EOK) {
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407 | printf("got rc=%d\n", rc);
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408 | async_forget(req);
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409 | if (rc == EAGAIN) {
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410 | conn->data_avail = false;
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411 | fibril_mutex_unlock(&conn->lock);
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412 | goto again;
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413 | }
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414 | fibril_mutex_unlock(&conn->lock);
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415 | return rc;
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416 | }
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417 |
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418 | sysarg_t retval;
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419 | async_wait_for(req, &retval);
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420 | if (retval != EOK) {
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421 | printf("got retval != EOK\n");
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422 | if (rc == EAGAIN) {
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423 | printf("rc == EAGAIN\n");
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424 | conn->data_avail = false;
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425 | }
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426 | fibril_mutex_unlock(&conn->lock);
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427 | return retval;
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428 | }
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429 |
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430 | *nrecv = IPC_GET_ARG1(answer);
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431 | fibril_mutex_unlock(&conn->lock);
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432 | printf("tcp_conn_recv_wait: nrecv=%zu\n", *nrecv);
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433 | printf("received: '");
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434 | size_t i;
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435 | for (i = 0; i < *nrecv; i++) {
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436 | putchar((char)((char *)buf)[i]);
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437 | }
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438 | printf("'\n");
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439 | return EOK;
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440 | }
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441 |
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442 | static void tcp_ev_connected(tcp_t *tcp, ipc_callid_t iid, ipc_call_t *icall)
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443 | {
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444 | printf("tcp_ev_connected()\n");
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445 | async_answer_0(iid, ENOTSUP);
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446 | }
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447 |
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448 | static void tcp_ev_conn_failed(tcp_t *tcp, ipc_callid_t iid, ipc_call_t *icall)
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449 | {
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450 | printf("tcp_ev_conn_failed()\n");
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451 | async_answer_0(iid, ENOTSUP);
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452 | }
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453 |
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454 | static void tcp_ev_conn_reset(tcp_t *tcp, ipc_callid_t iid, ipc_call_t *icall)
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455 | {
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456 | printf("tcp_ev_conn_reset()\n");
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457 | async_answer_0(iid, ENOTSUP);
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458 | }
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459 |
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460 | static void tcp_ev_data(tcp_t *tcp, ipc_callid_t iid, ipc_call_t *icall)
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461 | {
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462 | tcp_conn_t *conn;
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463 | sysarg_t conn_id;
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464 | int rc;
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465 |
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466 | printf("tcp_ev_data()\n");
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467 | conn_id = IPC_GET_ARG1(*icall);
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468 |
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469 | rc = tcp_conn_get(tcp, conn_id, &conn);
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470 | if (rc != EOK) {
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471 | printf("conn ID %zu not found\n",
|
---|
472 | conn_id);
|
---|
473 | async_answer_0(iid, ENOENT);
|
---|
474 | return;
|
---|
475 | }
|
---|
476 |
|
---|
477 | conn->data_avail = true;
|
---|
478 | fibril_condvar_broadcast(&conn->cv);
|
---|
479 |
|
---|
480 | async_answer_0(iid, EOK);
|
---|
481 | }
|
---|
482 |
|
---|
483 | static void tcp_ev_urg_data(tcp_t *tcp, ipc_callid_t iid, ipc_call_t *icall)
|
---|
484 | {
|
---|
485 | printf("tcp_ev_urg_data()\n");
|
---|
486 | async_answer_0(iid, ENOTSUP);
|
---|
487 | }
|
---|
488 |
|
---|
489 | static void tcp_cb_conn(ipc_callid_t iid, ipc_call_t *icall, void *arg)
|
---|
490 | {
|
---|
491 | tcp_t *tcp = (tcp_t *)arg;
|
---|
492 |
|
---|
493 | async_answer_0(iid, EOK);
|
---|
494 |
|
---|
495 | printf("tcp_cb_conn()\n");
|
---|
496 |
|
---|
497 | while (true) {
|
---|
498 | ipc_call_t call;
|
---|
499 | ipc_callid_t callid = async_get_call(&call);
|
---|
500 |
|
---|
501 | printf("tcp_cb_conn() - msg %d\n",
|
---|
502 | (int)IPC_GET_IMETHOD(call));
|
---|
503 | if (!IPC_GET_IMETHOD(call)) {
|
---|
504 | /* TODO: Handle hangup */
|
---|
505 | return;
|
---|
506 | }
|
---|
507 |
|
---|
508 | switch (IPC_GET_IMETHOD(call)) {
|
---|
509 | case TCP_EV_CONNECTED:
|
---|
510 | tcp_ev_connected(tcp, callid, &call);
|
---|
511 | break;
|
---|
512 | case TCP_EV_CONN_FAILED:
|
---|
513 | tcp_ev_conn_failed(tcp, callid, &call);
|
---|
514 | break;
|
---|
515 | case TCP_EV_CONN_RESET:
|
---|
516 | tcp_ev_conn_reset(tcp, callid, &call);
|
---|
517 | break;
|
---|
518 | case TCP_EV_DATA:
|
---|
519 | tcp_ev_data(tcp, callid, &call);
|
---|
520 | break;
|
---|
521 | case TCP_EV_URG_DATA:
|
---|
522 | tcp_ev_urg_data(tcp, callid, &call);
|
---|
523 | break;
|
---|
524 | default:
|
---|
525 | async_answer_0(callid, ENOTSUP);
|
---|
526 | break;
|
---|
527 | }
|
---|
528 | }
|
---|
529 | }
|
---|
530 |
|
---|
531 |
|
---|
532 | /** @}
|
---|
533 | */
|
---|