1 | // Copyright (c) Microsoft. All rights reserved.
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2 | // Licensed under the MIT license. See LICENSE file in the project root for full license information.
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3 |
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4 | #include <stdlib.h>
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5 | #include <stddef.h>
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6 | #include "azure_c_shared_utility/gballoc.h"
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7 | #include "azure_c_shared_utility/optimize_size.h"
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8 | #include "azure_c_shared_utility/xio.h"
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9 | #include "azure_c_shared_utility/xlogging.h"
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10 |
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11 | static const char* CONCRETE_OPTIONS = "concreteOptions";
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12 |
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13 | typedef struct XIO_INSTANCE_TAG
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14 | {
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15 | const IO_INTERFACE_DESCRIPTION* io_interface_description;
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16 | CONCRETE_IO_HANDLE concrete_xio_handle;
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17 | } XIO_INSTANCE;
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18 |
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19 | XIO_HANDLE xio_create(const IO_INTERFACE_DESCRIPTION* io_interface_description, const void* xio_create_parameters)
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20 | {
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21 | XIO_INSTANCE* xio_instance;
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22 | /* Codes_SRS_XIO_01_003: [If the argument io_interface_description is NULL, xio_create shall return NULL.] */
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23 | if ((io_interface_description == NULL) ||
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24 | /* Codes_SRS_XIO_01_004: [If any io_interface_description member is NULL, xio_create shall return NULL.] */
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25 | (io_interface_description->concrete_io_retrieveoptions == NULL) ||
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26 | (io_interface_description->concrete_io_create == NULL) ||
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27 | (io_interface_description->concrete_io_destroy == NULL) ||
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28 | (io_interface_description->concrete_io_open == NULL) ||
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29 | (io_interface_description->concrete_io_close == NULL) ||
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30 | (io_interface_description->concrete_io_send == NULL) ||
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31 | (io_interface_description->concrete_io_dowork == NULL) ||
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32 | (io_interface_description->concrete_io_setoption == NULL))
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33 | {
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34 | xio_instance = NULL;
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35 | }
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36 | else
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37 | {
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38 | xio_instance = (XIO_INSTANCE*)malloc(sizeof(XIO_INSTANCE));
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39 |
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40 | /* Codes_SRS_XIO_01_017: [If allocating the memory needed for the IO interface fails then xio_create shall return NULL.] */
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41 | if (xio_instance != NULL)
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42 | {
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43 | /* Codes_SRS_XIO_01_001: [xio_create shall return on success a non-NULL handle to a new IO interface.] */
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44 | xio_instance->io_interface_description = io_interface_description;
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45 |
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46 | /* Codes_SRS_XIO_01_002: [In order to instantiate the concrete IO implementation the function concrete_io_create from the io_interface_description shall be called, passing the xio_create_parameters argument.] */
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47 | xio_instance->concrete_xio_handle = xio_instance->io_interface_description->concrete_io_create((void*)xio_create_parameters);
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48 |
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49 | /* Codes_SRS_XIO_01_016: [If the underlying concrete_io_create call fails, xio_create shall return NULL.] */
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50 | if (xio_instance->concrete_xio_handle == NULL)
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51 | {
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52 | free(xio_instance);
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53 | xio_instance = NULL;
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54 | }
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55 | }
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56 | }
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57 | return (XIO_HANDLE)xio_instance;
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58 | }
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59 |
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60 | void xio_destroy(XIO_HANDLE xio)
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61 | {
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62 | /* Codes_SRS_XIO_01_007: [If the argument io is NULL, xio_destroy shall do nothing.] */
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63 | if (xio != NULL)
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64 | {
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65 | XIO_INSTANCE* xio_instance = (XIO_INSTANCE*)xio;
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66 |
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67 | /* Codes_SRS_XIO_01_006: [xio_destroy shall also call the concrete_io_destroy function that is member of the io_interface_description argument passed to xio_create, while passing as argument to concrete_io_destroy the result of the underlying concrete_io_create handle that was called as part of the xio_create call.] */
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68 | xio_instance->io_interface_description->concrete_io_destroy(xio_instance->concrete_xio_handle);
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69 |
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70 | /* Codes_SRS_XIO_01_005: [xio_destroy shall free all resources associated with the IO handle.] */
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71 | free(xio_instance);
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72 | }
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73 | }
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74 |
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75 | int xio_open(XIO_HANDLE xio, ON_IO_OPEN_COMPLETE on_io_open_complete, void* on_io_open_complete_context, ON_BYTES_RECEIVED on_bytes_received, void* on_bytes_received_context, ON_IO_ERROR on_io_error, void* on_io_error_context)
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76 | {
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77 | int result;
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78 |
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79 | if (xio == NULL)
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80 | {
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81 | /* Codes_SRS_XIO_01_021: [If handle is NULL, xio_open shall return a non-zero value.] */
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82 | result = MU_FAILURE;
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83 | }
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84 | else
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85 | {
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86 | XIO_INSTANCE* xio_instance = (XIO_INSTANCE*)xio;
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87 |
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88 | /* Codes_SRS_XIO_01_019: [xio_open shall call the specific concrete_xio_open function specified in xio_create, passing callback function and context arguments for three events: open completed, bytes received, and IO error.] */
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89 | if (xio_instance->io_interface_description->concrete_io_open(xio_instance->concrete_xio_handle, on_io_open_complete, on_io_open_complete_context, on_bytes_received, on_bytes_received_context, on_io_error, on_io_error_context) != 0)
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90 | {
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91 | /* Codes_SRS_XIO_01_022: [If the underlying concrete_io_open fails, xio_open shall return a non-zero value.] */
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92 | result = MU_FAILURE;
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93 | }
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94 | else
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95 | {
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96 | /* Codes_SRS_XIO_01_020: [On success, xio_open shall return 0.] */
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97 | result = 0;
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98 | }
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99 | }
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100 |
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101 | return result;
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102 | }
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103 |
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104 | int xio_close(XIO_HANDLE xio, ON_IO_CLOSE_COMPLETE on_io_close_complete, void* callback_context)
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105 | {
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106 | int result;
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107 |
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108 | if (xio == NULL)
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109 | {
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110 | /* Codes_SRS_XIO_01_025: [If handle is NULL, xio_close shall return a non-zero value.] */
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111 | result = MU_FAILURE;
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112 | }
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113 | else
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114 | {
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115 | XIO_INSTANCE* xio_instance = (XIO_INSTANCE*)xio;
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116 |
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117 | /* Codes_SRS_XIO_01_023: [xio_close shall call the specific concrete_io_close function specified in xio_create.] */
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118 | if (xio_instance->io_interface_description->concrete_io_close(xio_instance->concrete_xio_handle, on_io_close_complete, callback_context) != 0)
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119 | {
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120 | /* Codes_SRS_XIO_01_026: [If the underlying concrete_io_close fails, xio_close shall return a non-zero value.] */
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121 | result = MU_FAILURE;
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122 | }
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123 | else
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124 | {
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125 | /* Codes_SRS_XIO_01_024: [On success, xio_close shall return 0.] */
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126 | result = 0;
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127 | }
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128 | }
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129 |
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130 | return result;
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131 | }
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132 |
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133 | int xio_send(XIO_HANDLE xio, const void* buffer, size_t size, ON_SEND_COMPLETE on_send_complete, void* callback_context)
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134 | {
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135 | int result;
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136 |
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137 | /* Codes_SRS_XIO_01_011: [No error check shall be performed on buffer and size.] */
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138 | /* Codes_SRS_XIO_01_010: [If handle is NULL, xio_send shall return a non-zero value.] */
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139 | if (xio == NULL)
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140 | {
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141 | result = MU_FAILURE;
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142 | }
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143 | else
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144 | {
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145 | XIO_INSTANCE* xio_instance = (XIO_INSTANCE*)xio;
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146 |
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147 | /* Codes_SRS_XIO_01_008: [xio_send shall pass the sequence of bytes pointed to by buffer to the concrete IO implementation specified in xio_create, by calling the concrete_io_send function while passing down the buffer and size arguments to it.] */
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148 | /* Codes_SRS_XIO_01_009: [On success, xio_send shall return 0.] */
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149 | /* Codes_SRS_XIO_01_015: [If the underlying concrete_io_send fails, xio_send shall return a non-zero value.] */
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150 | /* Codes_SRS_XIO_01_027: [xio_send shall pass to the concrete_io_send function the on_send_complete and callback_context arguments.] */
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151 | result = xio_instance->io_interface_description->concrete_io_send(xio_instance->concrete_xio_handle, buffer, size, on_send_complete, callback_context);
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152 | }
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153 |
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154 | return result;
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155 | }
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156 |
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157 | void xio_dowork(XIO_HANDLE xio)
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158 | {
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159 | /* Codes_SRS_XIO_01_018: [When the handle argument is NULL, xio_dowork shall do nothing.] */
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160 | if (xio != NULL)
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161 | {
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162 | XIO_INSTANCE* xio_instance = (XIO_INSTANCE*)xio;
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163 |
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164 | /* Codes_SRS_XIO_01_012: [xio_dowork shall call the concrete XIO implementation specified in xio_create, by calling the concrete_io_dowork function.] */
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165 | xio_instance->io_interface_description->concrete_io_dowork(xio_instance->concrete_xio_handle);
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166 | }
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167 | }
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168 |
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169 | int xio_setoption(XIO_HANDLE xio, const char* optionName, const void* value)
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170 | {
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171 | int result;
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172 |
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173 | /* Codes_SRS_XIO_03_030: [If the xio argument or the optionName argument is NULL, xio_setoption shall return a non-zero value.] */
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174 | if (xio == NULL || optionName == NULL)
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175 | {
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176 | result = MU_FAILURE;
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177 | }
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178 | else
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179 | {
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180 | XIO_INSTANCE* xio_instance = (XIO_INSTANCE*)xio;
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181 |
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182 | if (strcmp(CONCRETE_OPTIONS, optionName) == 0)
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183 | {
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184 | /*then value is a pointer to OPTIONHANDLER_HANDLE*/
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185 | if (OptionHandler_FeedOptions((OPTIONHANDLER_HANDLE)value, xio_instance->concrete_xio_handle) != OPTIONHANDLER_OK)
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186 | {
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187 | LogError("unable to OptionHandler_FeedOptions");
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188 | result = MU_FAILURE;
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189 | }
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190 | else
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191 | {
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192 | result = 0;
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193 | }
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194 | }
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195 | else /*passthrough*/
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196 | {
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197 | /* Codes_SRS_XIO_003_028: [xio_setoption shall pass the optionName and value to the concrete IO implementation specified in xio_create by invoking the concrete_xio_setoption function.] */
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198 | /* Codes_SRS_XIO_03_029: [xio_setoption shall return 0 upon success.] */
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199 | /* Codes_SRS_XIO_03_031: [If the underlying concrete_xio_setoption fails, xio_setOption shall return a non-zero value.] */
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200 | result = xio_instance->io_interface_description->concrete_io_setoption(xio_instance->concrete_xio_handle, optionName, value);
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201 | }
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202 | }
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203 |
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204 | return result;
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205 | }
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206 |
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207 | static void* xio_CloneOption(const char* name, const void* value)
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208 | {
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209 | void *result;
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210 | if (
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211 | (name == NULL) ||
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212 | (value == NULL)
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213 | )
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214 | {
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215 | LogError("invalid argument detected: const char* name=%p, const void* value=%p", name, value);
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216 | result = NULL;
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217 | }
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218 | else
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219 | {
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220 | if (strcmp(name, CONCRETE_OPTIONS) == 0)
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221 | {
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222 | result = (void*)value;
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223 | }
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224 | else
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225 | {
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226 | LogError("unknown option: %s", name);
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227 | result = NULL;
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228 | }
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229 | }
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230 | return result;
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231 | }
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232 |
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233 |
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234 | static void xio_DestroyOption(const char* name, const void* value)
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235 | {
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236 | if (
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237 | (name == NULL) ||
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238 | (value == NULL)
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239 | )
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240 | {
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241 | LogError("invalid argument detected: const char* name=%p, const void* value=%p", name, value);
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242 | }
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243 | else
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244 | {
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245 | if (strcmp(name, CONCRETE_OPTIONS) == 0)
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246 | {
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247 | OptionHandler_Destroy((OPTIONHANDLER_HANDLE)value);
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248 | }
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249 | else
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250 | {
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251 | LogError("unknown option: %s", name);
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252 | }
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253 | }
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254 | }
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255 |
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256 | OPTIONHANDLER_HANDLE xio_retrieveoptions(XIO_HANDLE xio)
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257 | {
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258 | OPTIONHANDLER_HANDLE result;
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259 |
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260 | if (xio == NULL)
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261 | {
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262 | LogError("invalid argument detected: XIO_HANDLE xio=%p", xio);
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263 | result = NULL;
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264 | }
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265 | else
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266 | {
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267 | XIO_INSTANCE* xio_instance = (XIO_INSTANCE*)xio;
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268 | /*xio_retrieveoptions shall return a OPTIONHANDLER_HANDLE that has 1 option called "underlyingOptions" which is of type OPTIONHANDLER_HANDLE*/
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269 | result = OptionHandler_Create(xio_CloneOption, xio_DestroyOption, (pfSetOption)xio_setoption);
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270 | if (result == NULL)
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271 | {
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272 | LogError("unable to OptionHandler_Create");
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273 | /*return as is*/
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274 | }
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275 | else
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276 | {
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277 | OPTIONHANDLER_HANDLE concreteOptions = xio_instance->io_interface_description->concrete_io_retrieveoptions(xio_instance->concrete_xio_handle);
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278 | if (concreteOptions == NULL)
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279 | {
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280 | LogError("unable to concrete_io_retrieveoptions");
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281 | OptionHandler_Destroy(result);
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282 | result = NULL;
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283 | }
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284 | else
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285 | {
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286 | if (OptionHandler_AddOption(result, CONCRETE_OPTIONS, concreteOptions) != OPTIONHANDLER_OK)
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287 | {
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288 | LogError("unable to OptionHandler_AddOption");
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289 | OptionHandler_Destroy(concreteOptions);
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290 | OptionHandler_Destroy(result);
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291 | result = NULL;
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292 | }
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293 | else
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294 | {
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295 | /*all is fine*/
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296 | }
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297 | }
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298 | }
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299 | }
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300 |
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301 | return result;
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302 | }
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303 |
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