[453] | 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 <stdio.h>
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| 6 | #include <stdbool.h>
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| 7 | #include <stdint.h>
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| 8 | #include <limits.h>
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| 9 | #include "azure_c_shared_utility/gballoc.h"
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| 10 | #include "azure_c_shared_utility/xio.h"
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| 11 | #include "azure_c_shared_utility/socketio.h"
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| 12 | #include "azure_c_shared_utility/crt_abstractions.h"
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| 13 | #include "azure_c_shared_utility/http_proxy_io.h"
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| 14 | #include "azure_c_shared_utility/azure_base64.h"
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| 15 |
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| 16 | static const char* const OPTION_UNDERLYING_IO_OPTIONS = "underlying_io_options";
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| 17 |
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| 18 | typedef enum HTTP_PROXY_IO_STATE_TAG
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| 19 | {
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| 20 | HTTP_PROXY_IO_STATE_CLOSED,
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| 21 | HTTP_PROXY_IO_STATE_OPENING_UNDERLYING_IO,
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| 22 | HTTP_PROXY_IO_STATE_WAITING_FOR_CONNECT_RESPONSE,
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| 23 | HTTP_PROXY_IO_STATE_OPEN,
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| 24 | HTTP_PROXY_IO_STATE_CLOSING,
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| 25 | HTTP_PROXY_IO_STATE_ERROR
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| 26 | } HTTP_PROXY_IO_STATE;
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| 27 |
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| 28 | typedef struct HTTP_PROXY_IO_INSTANCE_TAG
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| 29 | {
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| 30 | HTTP_PROXY_IO_STATE http_proxy_io_state;
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| 31 | ON_BYTES_RECEIVED on_bytes_received;
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| 32 | void* on_bytes_received_context;
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| 33 | ON_IO_ERROR on_io_error;
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| 34 | void* on_io_error_context;
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| 35 | ON_IO_OPEN_COMPLETE on_io_open_complete;
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| 36 | void* on_io_open_complete_context;
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| 37 | ON_IO_CLOSE_COMPLETE on_io_close_complete;
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| 38 | void* on_io_close_complete_context;
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| 39 | char* hostname;
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| 40 | int port;
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| 41 | char* proxy_hostname;
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| 42 | int proxy_port;
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| 43 | char* username;
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| 44 | char* password;
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| 45 | XIO_HANDLE underlying_io;
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| 46 | unsigned char* receive_buffer;
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| 47 | size_t receive_buffer_size;
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| 48 | } HTTP_PROXY_IO_INSTANCE;
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| 49 |
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| 50 | static CONCRETE_IO_HANDLE http_proxy_io_create(void* io_create_parameters)
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| 51 | {
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| 52 | HTTP_PROXY_IO_INSTANCE* result;
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| 53 |
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| 54 | if (io_create_parameters == NULL)
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| 55 | {
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| 56 | /* Codes_SRS_HTTP_PROXY_IO_01_002: [ If io_create_parameters is NULL, http_proxy_io_create shall fail and return NULL. ]*/
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| 57 | result = NULL;
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| 58 | LogError("NULL io_create_parameters.");
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| 59 | }
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| 60 | else
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| 61 | {
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| 62 | /* Codes_SRS_HTTP_PROXY_IO_01_003: [ io_create_parameters shall be used as an HTTP_PROXY_IO_CONFIG*. ]*/
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| 63 | HTTP_PROXY_IO_CONFIG* http_proxy_io_config = (HTTP_PROXY_IO_CONFIG*)io_create_parameters;
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| 64 | if ((http_proxy_io_config->hostname == NULL) ||
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| 65 | (http_proxy_io_config->proxy_hostname == NULL))
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| 66 | {
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| 67 | /* Codes_SRS_HTTP_PROXY_IO_01_004: [ If the hostname or proxy_hostname member is NULL, then http_proxy_io_create shall fail and return NULL. ]*/
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| 68 | result = NULL;
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| 69 | LogError("Bad arguments: hostname = %p, proxy_hostname = %p",
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| 70 | http_proxy_io_config->hostname, http_proxy_io_config->proxy_hostname);
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| 71 | }
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| 72 | /* Codes_SRS_HTTP_PROXY_IO_01_095: [ If one of the fields username and password is non-NULL, then the other has to be also non-NULL, otherwise http_proxy_io_create shall fail and return NULL. ]*/
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| 73 | else if (((http_proxy_io_config->username == NULL) && (http_proxy_io_config->password != NULL)) ||
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| 74 | ((http_proxy_io_config->username != NULL) && (http_proxy_io_config->password == NULL)))
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| 75 | {
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| 76 | result = NULL;
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| 77 | LogError("Bad arguments: username = %p, password = %p",
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| 78 | http_proxy_io_config->username, http_proxy_io_config->password);
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| 79 | }
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| 80 | else
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| 81 | {
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| 82 | /* Codes_SRS_HTTP_PROXY_IO_01_001: [ http_proxy_io_create shall create a new instance of the HTTP proxy IO. ]*/
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| 83 | result = (HTTP_PROXY_IO_INSTANCE*)calloc(1, sizeof(HTTP_PROXY_IO_INSTANCE));
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| 84 | if (result == NULL)
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| 85 | {
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| 86 | /* Codes_SRS_HTTP_PROXY_IO_01_051: [ If allocating memory for the new instance fails, http_proxy_io_create shall fail and return NULL. ]*/
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| 87 | LogError("Failed allocating HTTP proxy IO instance.");
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| 88 | }
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| 89 | else
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| 90 | {
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| 91 | /* Codes_SRS_HTTP_PROXY_IO_01_005: [ http_proxy_io_create shall copy the hostname, port, username and password values for later use when the actual CONNECT is performed. ]*/
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| 92 | /* Codes_SRS_HTTP_PROXY_IO_01_006: [ hostname and proxy_hostname, username and password shall be copied by calling mallocAndStrcpy_s. ]*/
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| 93 | if (mallocAndStrcpy_s(&result->hostname, http_proxy_io_config->hostname) != 0)
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| 94 | {
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| 95 | /* Codes_SRS_HTTP_PROXY_IO_01_007: [ If mallocAndStrcpy_s fails then http_proxy_io_create shall fail and return NULL. ]*/
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| 96 | LogError("Failed to copy the hostname.");
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| 97 | /* Codes_SRS_HTTP_PROXY_IO_01_008: [ When http_proxy_io_create fails, all allocated resources up to that point shall be freed. ]*/
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| 98 | free(result);
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| 99 | result = NULL;
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| 100 | }
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| 101 | else
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| 102 | {
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| 103 | /* Codes_SRS_HTTP_PROXY_IO_01_006: [ hostname and proxy_hostname, username and password shall be copied by calling mallocAndStrcpy_s. ]*/
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| 104 | if (mallocAndStrcpy_s(&result->proxy_hostname, http_proxy_io_config->proxy_hostname) != 0)
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| 105 | {
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| 106 | /* Codes_SRS_HTTP_PROXY_IO_01_007: [ If mallocAndStrcpy_s fails then http_proxy_io_create shall fail and return NULL. ]*/
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| 107 | LogError("Failed to copy the proxy_hostname.");
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| 108 | /* Codes_SRS_HTTP_PROXY_IO_01_008: [ When http_proxy_io_create fails, all allocated resources up to that point shall be freed. ]*/
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| 109 | free(result->hostname);
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| 110 | free(result);
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| 111 | result = NULL;
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| 112 | }
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| 113 | else
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| 114 | {
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| 115 | result->username = NULL;
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| 116 | result->password = NULL;
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| 117 |
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| 118 | /* Codes_SRS_HTTP_PROXY_IO_01_006: [ hostname and proxy_hostname, username and password shall be copied by calling mallocAndStrcpy_s. ]*/
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| 119 | /* Codes_SRS_HTTP_PROXY_IO_01_094: [ username and password shall be optional. ]*/
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| 120 | if ((http_proxy_io_config->username != NULL) && (mallocAndStrcpy_s(&result->username, http_proxy_io_config->username) != 0))
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| 121 | {
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| 122 | /* Codes_SRS_HTTP_PROXY_IO_01_007: [ If mallocAndStrcpy_s fails then http_proxy_io_create shall fail and return NULL. ]*/
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| 123 | LogError("Failed to copy the username.");
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| 124 | /* Codes_SRS_HTTP_PROXY_IO_01_008: [ When http_proxy_io_create fails, all allocated resources up to that point shall be freed. ]*/
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| 125 | free(result->proxy_hostname);
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| 126 | free(result->hostname);
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| 127 | free(result);
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| 128 | result = NULL;
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| 129 | }
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| 130 | else
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| 131 | {
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| 132 | /* Codes_SRS_HTTP_PROXY_IO_01_006: [ hostname and proxy_hostname, username and password shall be copied by calling mallocAndStrcpy_s. ]*/
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| 133 | /* Codes_SRS_HTTP_PROXY_IO_01_094: [ username and password shall be optional. ]*/
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| 134 | if ((http_proxy_io_config->password != NULL) && (mallocAndStrcpy_s(&result->password, http_proxy_io_config->password) != 0))
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| 135 | {
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| 136 | /* Codes_SRS_HTTP_PROXY_IO_01_007: [ If mallocAndStrcpy_s fails then http_proxy_io_create shall fail and return NULL. ]*/
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| 137 | LogError("Failed to copy the passowrd.");
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| 138 | /* Codes_SRS_HTTP_PROXY_IO_01_008: [ When http_proxy_io_create fails, all allocated resources up to that point shall be freed. ]*/
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| 139 | free(result->username);
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| 140 | free(result->proxy_hostname);
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| 141 | free(result->hostname);
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| 142 | free(result);
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| 143 | result = NULL;
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| 144 | }
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| 145 | else
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| 146 | {
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| 147 | /* Codes_SRS_HTTP_PROXY_IO_01_010: [ - io_interface_description shall be set to the result of socketio_get_interface_description. ]*/
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| 148 | const IO_INTERFACE_DESCRIPTION* underlying_io_interface = socketio_get_interface_description();
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| 149 | if (underlying_io_interface == NULL)
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| 150 | {
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| 151 | /* Codes_SRS_HTTP_PROXY_IO_01_050: [ If socketio_get_interface_description fails, http_proxy_io_create shall fail and return NULL. ]*/
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| 152 | LogError("Unable to get the socket IO interface description.");
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| 153 | /* Codes_SRS_HTTP_PROXY_IO_01_008: [ When http_proxy_io_create fails, all allocated resources up to that point shall be freed. ]*/
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| 154 | free(result->password);
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| 155 | free(result->username);
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| 156 | free(result->proxy_hostname);
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| 157 | free(result->hostname);
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| 158 | free(result);
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| 159 | result = NULL;
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| 160 | }
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| 161 | else
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| 162 | {
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| 163 | SOCKETIO_CONFIG socket_io_config;
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| 164 |
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| 165 | /* Codes_SRS_HTTP_PROXY_IO_01_011: [ - xio_create_parameters shall be set to a SOCKETIO_CONFIG* where hostname is set to the proxy_hostname member of io_create_parameters and port is set to the proxy_port member of io_create_parameters. ]*/
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| 166 | socket_io_config.hostname = http_proxy_io_config->proxy_hostname;
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| 167 | socket_io_config.port = http_proxy_io_config->proxy_port;
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| 168 | socket_io_config.accepted_socket = NULL;
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| 169 |
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| 170 | /* Codes_SRS_HTTP_PROXY_IO_01_009: [ http_proxy_io_create shall create a new socket IO by calling xio_create with the arguments: ]*/
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| 171 | result->underlying_io = xio_create(underlying_io_interface, &socket_io_config);
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| 172 | if (result->underlying_io == NULL)
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| 173 | {
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| 174 | /* Codes_SRS_HTTP_PROXY_IO_01_012: [ If xio_create fails, http_proxy_io_create shall fail and return NULL. ]*/
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| 175 | LogError("Unable to create the underlying IO.");
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| 176 | /* Codes_SRS_HTTP_PROXY_IO_01_008: [ When http_proxy_io_create fails, all allocated resources up to that point shall be freed. ]*/
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| 177 | free(result->password);
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| 178 | free(result->username);
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| 179 | free(result->proxy_hostname);
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| 180 | free(result->hostname);
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| 181 | free(result);
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| 182 | result = NULL;
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| 183 | }
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| 184 | else
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| 185 | {
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| 186 | result->port = http_proxy_io_config->port;
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| 187 | result->proxy_port = http_proxy_io_config->proxy_port;
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| 188 | result->receive_buffer = NULL;
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| 189 | result->receive_buffer_size = 0;
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| 190 | result->http_proxy_io_state = HTTP_PROXY_IO_STATE_CLOSED;
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| 191 | }
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| 192 | }
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| 193 | }
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| 194 | }
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| 195 | }
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| 196 | }
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| 197 | }
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| 198 | }
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| 199 | }
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| 200 |
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| 201 | return result;
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| 202 | }
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| 203 |
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| 204 | static void http_proxy_io_destroy(CONCRETE_IO_HANDLE http_proxy_io)
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| 205 | {
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| 206 | if (http_proxy_io == NULL)
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| 207 | {
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| 208 | /* Codes_SRS_HTTP_PROXY_IO_01_014: [ If http_proxy_io is NULL, http_proxy_io_destroy shall do nothing. ]*/
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| 209 | LogError("NULL http_proxy_io.");
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| 210 | }
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| 211 | else
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| 212 | {
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| 213 | HTTP_PROXY_IO_INSTANCE* http_proxy_io_instance = (HTTP_PROXY_IO_INSTANCE*)http_proxy_io;
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| 214 |
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| 215 | /* Codes_SRS_HTTP_PROXY_IO_01_013: [ http_proxy_io_destroy shall free the HTTP proxy IO instance indicated by http_proxy_io. ]*/
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| 216 | if (http_proxy_io_instance->receive_buffer != NULL)
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| 217 | {
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| 218 | free(http_proxy_io_instance->receive_buffer);
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| 219 | }
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| 220 |
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| 221 | /* Codes_SRS_HTTP_PROXY_IO_01_016: [ http_proxy_io_destroy shall destroy the underlying IO created in http_proxy_io_create by calling xio_destroy. ]*/
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| 222 | xio_destroy(http_proxy_io_instance->underlying_io);
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| 223 | free(http_proxy_io_instance->hostname);
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| 224 | free(http_proxy_io_instance->proxy_hostname);
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| 225 | free(http_proxy_io_instance->username);
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| 226 | free(http_proxy_io_instance->password);
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| 227 | free(http_proxy_io_instance);
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| 228 | }
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| 229 | }
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| 230 |
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| 231 | static void indicate_open_complete_error_and_close(HTTP_PROXY_IO_INSTANCE* http_proxy_io_instance)
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| 232 | {
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| 233 | http_proxy_io_instance->http_proxy_io_state = HTTP_PROXY_IO_STATE_CLOSED;
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| 234 | (void)xio_close(http_proxy_io_instance->underlying_io, NULL, NULL);
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| 235 | http_proxy_io_instance->on_io_open_complete(http_proxy_io_instance->on_io_open_complete_context, IO_OPEN_ERROR);
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| 236 | }
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| 237 |
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| 238 | // This callback usage needs to be either verified and commented or integrated into
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| 239 | // the state machine.
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| 240 | static void unchecked_on_send_complete(void* context, IO_SEND_RESULT send_result)
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| 241 | {
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| 242 | (void)context;
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| 243 | (void)send_result;
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| 244 | }
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| 245 |
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| 246 | static void on_underlying_io_open_complete(void* context, IO_OPEN_RESULT open_result)
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| 247 | {
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| 248 | if (context == NULL)
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| 249 | {
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| 250 | /* Codes_SRS_HTTP_PROXY_IO_01_081: [ on_underlying_io_open_complete called with NULL context shall do nothing. ]*/
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| 251 | LogError("NULL context in on_underlying_io_open_complete");
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| 252 | }
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| 253 | else
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| 254 | {
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| 255 | HTTP_PROXY_IO_INSTANCE* http_proxy_io_instance = (HTTP_PROXY_IO_INSTANCE*)context;
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| 256 | switch (http_proxy_io_instance->http_proxy_io_state)
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| 257 | {
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| 258 | default:
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| 259 | LogError("on_underlying_io_open_complete called in an unexpected state.");
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| 260 | break;
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| 261 |
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| 262 | case HTTP_PROXY_IO_STATE_CLOSING:
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| 263 | case HTTP_PROXY_IO_STATE_OPEN:
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| 264 | /* Codes_SRS_HTTP_PROXY_IO_01_077: [ When on_underlying_io_open_complete is called in after OPEN has completed, the on_io_error callback shall be triggered passing the on_io_error_context argument as context. ]*/
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| 265 | http_proxy_io_instance->on_io_error(http_proxy_io_instance->on_io_error_context);
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| 266 | break;
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| 267 |
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| 268 | case HTTP_PROXY_IO_STATE_WAITING_FOR_CONNECT_RESPONSE:
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| 269 | /* Codes_SRS_HTTP_PROXY_IO_01_076: [ When on_underlying_io_open_complete is called while waiting for the CONNECT reply, the on_open_complete callback shall be triggered with IO_OPEN_ERROR, passing also the on_open_complete_context argument as context. ]*/
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| 270 | LogError("Open complete called again by underlying IO.");
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| 271 | indicate_open_complete_error_and_close(http_proxy_io_instance);
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| 272 | break;
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| 273 |
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| 274 | case HTTP_PROXY_IO_STATE_OPENING_UNDERLYING_IO:
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| 275 | switch (open_result)
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| 276 | {
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| 277 | default:
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| 278 | case IO_OPEN_ERROR:
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| 279 | /* Codes_SRS_HTTP_PROXY_IO_01_078: [ When on_underlying_io_open_complete is called with IO_OPEN_ERROR, the on_open_complete callback shall be triggered with IO_OPEN_ERROR, passing also the on_open_complete_context argument as context. ]*/
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| 280 | LogError("Underlying IO open failed");
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| 281 | indicate_open_complete_error_and_close(http_proxy_io_instance);
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| 282 | break;
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| 283 |
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| 284 | case IO_OPEN_CANCELLED:
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| 285 | /* Codes_SRS_HTTP_PROXY_IO_01_079: [ When on_underlying_io_open_complete is called with IO_OPEN_CANCELLED, the on_open_complete callback shall be triggered with IO_OPEN_CANCELLED, passing also the on_open_complete_context argument as context. ]*/
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| 286 | LogError("Underlying IO open failed");
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| 287 | http_proxy_io_instance->http_proxy_io_state = HTTP_PROXY_IO_STATE_CLOSED;
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| 288 | (void)xio_close(http_proxy_io_instance->underlying_io, NULL, NULL);
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| 289 | http_proxy_io_instance->on_io_open_complete(http_proxy_io_instance->on_io_open_complete_context, IO_OPEN_CANCELLED);
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| 290 | break;
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| 291 |
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| 292 | case IO_OPEN_OK:
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| 293 | {
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| 294 | STRING_HANDLE encoded_auth_string;
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| 295 |
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| 296 | /* Codes_SRS_HTTP_PROXY_IO_01_057: [ When on_underlying_io_open_complete is called, the http_proxy_io shall send the CONNECT request constructed per RFC 2817: ]*/
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| 297 | http_proxy_io_instance->http_proxy_io_state = HTTP_PROXY_IO_STATE_WAITING_FOR_CONNECT_RESPONSE;
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| 298 |
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| 299 | if (http_proxy_io_instance->username != NULL)
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| 300 | {
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| 301 | char* plain_auth_string_bytes;
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| 302 |
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| 303 | /* Codes_SRS_HTTP_PROXY_IO_01_060: [ - The value of Proxy-Authorization shall be the constructed according to RFC 2617. ]*/
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| 304 | int plain_auth_string_length = (int)(strlen(http_proxy_io_instance->username)+1);
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| 305 | if (http_proxy_io_instance->password != NULL)
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| 306 | {
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| 307 | plain_auth_string_length += (int)strlen(http_proxy_io_instance->password);
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| 308 | }
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| 309 |
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| 310 | if (plain_auth_string_length < 0)
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| 311 | {
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| 312 | /* Codes_SRS_HTTP_PROXY_IO_01_062: [ If any failure is encountered while constructing the request, the on_open_complete callback shall be triggered with IO_OPEN_ERROR, passing also the on_open_complete_context argument as context. ]*/
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| 313 | encoded_auth_string = NULL;
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| 314 | indicate_open_complete_error_and_close(http_proxy_io_instance);
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| 315 | }
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| 316 | else
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| 317 | {
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| 318 | plain_auth_string_bytes = (char*)malloc(plain_auth_string_length + 1);
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| 319 | if (plain_auth_string_bytes == NULL)
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| 320 | {
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| 321 | /* Codes_SRS_HTTP_PROXY_IO_01_062: [ If any failure is encountered while constructing the request, the on_open_complete callback shall be triggered with IO_OPEN_ERROR, passing also the on_open_complete_context argument as context. ]*/
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| 322 | encoded_auth_string = NULL;
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| 323 | indicate_open_complete_error_and_close(http_proxy_io_instance);
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| 324 | }
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| 325 | else
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| 326 | {
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| 327 | /* Codes_SRS_HTTP_PROXY_IO_01_091: [ To receive authorization, the client sends the userid and password, separated by a single colon (":") character, within a base64 [7] encoded string in the credentials. ]*/
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| 328 | /* Codes_SRS_HTTP_PROXY_IO_01_092: [ A client MAY preemptively send the corresponding Authorization header with requests for resources in that space without receipt of another challenge from the server. ]*/
|
---|
| 329 | /* Codes_SRS_HTTP_PROXY_IO_01_093: [ Userids might be case sensitive. ]*/
|
---|
| 330 | if (sprintf(plain_auth_string_bytes, "%s:%s", http_proxy_io_instance->username, (http_proxy_io_instance->password == NULL) ? "" : http_proxy_io_instance->password) < 0)
|
---|
| 331 | {
|
---|
| 332 | /* Codes_SRS_HTTP_PROXY_IO_01_062: [ If any failure is encountered while constructing the request, the on_open_complete callback shall be triggered with IO_OPEN_ERROR, passing also the on_open_complete_context argument as context. ]*/
|
---|
| 333 | encoded_auth_string = NULL;
|
---|
| 334 | indicate_open_complete_error_and_close(http_proxy_io_instance);
|
---|
| 335 | }
|
---|
| 336 | else
|
---|
| 337 | {
|
---|
| 338 | /* Codes_SRS_HTTP_PROXY_IO_01_061: [ Encoding to Base64 shall be done by calling Azure_Base64_Encode_Bytes. ]*/
|
---|
| 339 | encoded_auth_string = Azure_Base64_Encode_Bytes((const unsigned char*)plain_auth_string_bytes, plain_auth_string_length);
|
---|
| 340 | if (encoded_auth_string == NULL)
|
---|
| 341 | {
|
---|
| 342 | /* Codes_SRS_HTTP_PROXY_IO_01_062: [ If any failure is encountered while constructing the request, the on_open_complete callback shall be triggered with IO_OPEN_ERROR, passing also the on_open_complete_context argument as context. ]*/
|
---|
| 343 | LogError("Cannot Base64 encode auth string");
|
---|
| 344 | indicate_open_complete_error_and_close(http_proxy_io_instance);
|
---|
| 345 | }
|
---|
| 346 | }
|
---|
| 347 |
|
---|
| 348 | free(plain_auth_string_bytes);
|
---|
| 349 | }
|
---|
| 350 | }
|
---|
| 351 | }
|
---|
| 352 | else
|
---|
| 353 | {
|
---|
| 354 | encoded_auth_string = NULL;
|
---|
| 355 | }
|
---|
| 356 |
|
---|
| 357 | if ((http_proxy_io_instance->username != NULL) &&
|
---|
| 358 | (encoded_auth_string == NULL))
|
---|
| 359 | {
|
---|
| 360 | LogError("Cannot create authorization header");
|
---|
| 361 | }
|
---|
| 362 | else
|
---|
| 363 | {
|
---|
| 364 | int connect_request_length;
|
---|
| 365 | const char* auth_string_payload;
|
---|
| 366 | /* Codes_SRS_HTTP_PROXY_IO_01_075: [ The Request-URI portion of the Request-Line is always an 'authority' as defined by URI Generic Syntax [2], which is to say the host name and port number destination of the requested connection separated by a colon: ]*/
|
---|
| 367 | const char request_format[] = "CONNECT %s:%d HTTP/1.1\r\nHost:%s:%d%s%s\r\n\r\n";
|
---|
| 368 | const char proxy_basic[] = "\r\nProxy-authorization: Basic ";
|
---|
| 369 | if (http_proxy_io_instance->username != NULL)
|
---|
| 370 | {
|
---|
| 371 | auth_string_payload = STRING_c_str(encoded_auth_string);
|
---|
| 372 | }
|
---|
| 373 | else
|
---|
| 374 | {
|
---|
| 375 | auth_string_payload = "";
|
---|
| 376 | }
|
---|
| 377 |
|
---|
| 378 | /* Codes_SRS_HTTP_PROXY_IO_01_059: [ - If username and password have been specified in the arguments passed to http_proxy_io_create, then the header Proxy-Authorization shall be added to the request. ]*/
|
---|
| 379 |
|
---|
| 380 | connect_request_length = (int)(strlen(request_format)+(strlen(http_proxy_io_instance->hostname)*2)+strlen(auth_string_payload)+10);
|
---|
| 381 | if (http_proxy_io_instance->username != NULL)
|
---|
| 382 | {
|
---|
| 383 | connect_request_length += (int)strlen(proxy_basic);
|
---|
| 384 | }
|
---|
| 385 |
|
---|
| 386 | if (connect_request_length < 0)
|
---|
| 387 | {
|
---|
| 388 | /* Codes_SRS_HTTP_PROXY_IO_01_062: [ If any failure is encountered while constructing the request, the on_open_complete callback shall be triggered with IO_OPEN_ERROR, passing also the on_open_complete_context argument as context. ]*/
|
---|
| 389 | LogError("Cannot encode the CONNECT request");
|
---|
| 390 | indicate_open_complete_error_and_close(http_proxy_io_instance);
|
---|
| 391 | }
|
---|
| 392 | else
|
---|
| 393 | {
|
---|
| 394 | char* connect_request = (char*)malloc(connect_request_length + 1);
|
---|
| 395 | if (connect_request == NULL)
|
---|
| 396 | {
|
---|
| 397 | /* Codes_SRS_HTTP_PROXY_IO_01_062: [ If any failure is encountered while constructing the request, the on_open_complete callback shall be triggered with IO_OPEN_ERROR, passing also the on_open_complete_context argument as context. ]*/
|
---|
| 398 | LogError("Cannot allocate memory for CONNECT request");
|
---|
| 399 | indicate_open_complete_error_and_close(http_proxy_io_instance);
|
---|
| 400 | }
|
---|
| 401 | else
|
---|
| 402 | {
|
---|
| 403 | /* Codes_SRS_HTTP_PROXY_IO_01_059: [ - If username and password have been specified in the arguments passed to http_proxy_io_create, then the header Proxy-Authorization shall be added to the request. ]*/
|
---|
| 404 | connect_request_length = sprintf(connect_request, request_format,
|
---|
| 405 | http_proxy_io_instance->hostname,
|
---|
| 406 | http_proxy_io_instance->port,
|
---|
| 407 | http_proxy_io_instance->hostname,
|
---|
| 408 | http_proxy_io_instance->port,
|
---|
| 409 | (http_proxy_io_instance->username != NULL) ? proxy_basic : "",
|
---|
| 410 | auth_string_payload);
|
---|
| 411 |
|
---|
| 412 | if (connect_request_length < 0)
|
---|
| 413 | {
|
---|
| 414 | /* Codes_SRS_HTTP_PROXY_IO_01_062: [ If any failure is encountered while constructing the request, the on_open_complete callback shall be triggered with IO_OPEN_ERROR, passing also the on_open_complete_context argument as context. ]*/
|
---|
| 415 | LogError("Cannot encode the CONNECT request");
|
---|
| 416 | indicate_open_complete_error_and_close(http_proxy_io_instance);
|
---|
| 417 | }
|
---|
| 418 | else
|
---|
| 419 | {
|
---|
| 420 | /* Codes_SRS_HTTP_PROXY_IO_01_063: [ The request shall be sent by calling xio_send and passing NULL as on_send_complete callback. ]*/
|
---|
| 421 | if (xio_send(http_proxy_io_instance->underlying_io, connect_request, connect_request_length, unchecked_on_send_complete, NULL) != 0)
|
---|
| 422 | {
|
---|
| 423 | /* Codes_SRS_HTTP_PROXY_IO_01_064: [ If xio_send fails, the on_open_complete callback shall be triggered with IO_OPEN_ERROR, passing also the on_open_complete_context argument as context. ]*/
|
---|
| 424 | LogError("Could not send CONNECT request");
|
---|
| 425 | indicate_open_complete_error_and_close(http_proxy_io_instance);
|
---|
| 426 | }
|
---|
| 427 | }
|
---|
| 428 |
|
---|
| 429 | free(connect_request);
|
---|
| 430 | }
|
---|
| 431 | }
|
---|
| 432 | }
|
---|
| 433 |
|
---|
| 434 | if (encoded_auth_string != NULL)
|
---|
| 435 | {
|
---|
| 436 | STRING_delete(encoded_auth_string);
|
---|
| 437 | }
|
---|
| 438 |
|
---|
| 439 | break;
|
---|
| 440 | }
|
---|
| 441 | }
|
---|
| 442 |
|
---|
| 443 | break;
|
---|
| 444 | }
|
---|
| 445 | }
|
---|
| 446 | }
|
---|
| 447 |
|
---|
| 448 | static void on_underlying_io_error(void* context)
|
---|
| 449 | {
|
---|
| 450 | if (context == NULL)
|
---|
| 451 | {
|
---|
| 452 | /* Codes_SRS_HTTP_PROXY_IO_01_088: [ on_underlying_io_error called with NULL context shall do nothing. ]*/
|
---|
| 453 | LogError("NULL context in on_underlying_io_error");
|
---|
| 454 | }
|
---|
| 455 | else
|
---|
| 456 | {
|
---|
| 457 | HTTP_PROXY_IO_INSTANCE* http_proxy_io_instance = (HTTP_PROXY_IO_INSTANCE*)context;
|
---|
| 458 |
|
---|
| 459 | switch (http_proxy_io_instance->http_proxy_io_state)
|
---|
| 460 | {
|
---|
| 461 | default:
|
---|
| 462 | LogError("on_underlying_io_error in invalid state");
|
---|
| 463 | break;
|
---|
| 464 |
|
---|
| 465 | case HTTP_PROXY_IO_STATE_OPENING_UNDERLYING_IO:
|
---|
| 466 | case HTTP_PROXY_IO_STATE_WAITING_FOR_CONNECT_RESPONSE:
|
---|
| 467 | /* Codes_SRS_HTTP_PROXY_IO_01_087: [ If the on_underlying_io_error callback is called while OPENING, the on_open_complete callback shall be triggered with IO_OPEN_ERROR, passing also the on_open_complete_context argument as context. ]*/
|
---|
| 468 | indicate_open_complete_error_and_close(http_proxy_io_instance);
|
---|
| 469 | break;
|
---|
| 470 |
|
---|
| 471 | case HTTP_PROXY_IO_STATE_OPEN:
|
---|
| 472 | /* Codes_SRS_HTTP_PROXY_IO_01_089: [ If the on_underlying_io_error callback is called while the IO is OPEN, the on_io_error callback shall be called with the on_io_error_context argument as context. ]*/
|
---|
| 473 | http_proxy_io_instance->http_proxy_io_state = HTTP_PROXY_IO_STATE_ERROR;
|
---|
| 474 | http_proxy_io_instance->on_io_error(http_proxy_io_instance->on_io_error_context);
|
---|
| 475 | break;
|
---|
| 476 | }
|
---|
| 477 | }
|
---|
| 478 | }
|
---|
| 479 |
|
---|
| 480 | static void on_underlying_io_close_complete(void* context)
|
---|
| 481 | {
|
---|
| 482 | if (context == NULL)
|
---|
| 483 | {
|
---|
| 484 | /* Cdoes_SRS_HTTP_PROXY_IO_01_084: [ on_underlying_io_close_complete called with NULL context shall do nothing. ]*/
|
---|
| 485 | LogError("NULL context in on_underlying_io_open_complete");
|
---|
| 486 | }
|
---|
| 487 | else
|
---|
| 488 | {
|
---|
| 489 | HTTP_PROXY_IO_INSTANCE* http_proxy_io_instance = (HTTP_PROXY_IO_INSTANCE*)context;
|
---|
| 490 |
|
---|
| 491 | switch (http_proxy_io_instance->http_proxy_io_state)
|
---|
| 492 | {
|
---|
| 493 | default:
|
---|
| 494 | LogError("on_underlying_io_close_complete called in an invalid state");
|
---|
| 495 | break;
|
---|
| 496 |
|
---|
| 497 | case HTTP_PROXY_IO_STATE_CLOSING:
|
---|
| 498 | http_proxy_io_instance->http_proxy_io_state = HTTP_PROXY_IO_STATE_CLOSED;
|
---|
| 499 |
|
---|
| 500 | /* Codes_SRS_HTTP_PROXY_IO_01_086: [ If the on_io_close_complete callback passed to http_proxy_io_close was NULL, no callback shall be triggered. ]*/
|
---|
| 501 | if (http_proxy_io_instance->on_io_close_complete != NULL)
|
---|
| 502 | {
|
---|
| 503 | /* Codes_SRS_HTTP_PROXY_IO_01_083: [ on_underlying_io_close_complete while CLOSING shall call the on_io_close_complete callback, passing to it the on_io_close_complete_context as context argument. ]*/
|
---|
| 504 | http_proxy_io_instance->on_io_close_complete(http_proxy_io_instance->on_io_close_complete_context);
|
---|
| 505 | }
|
---|
| 506 |
|
---|
| 507 | break;
|
---|
| 508 | }
|
---|
| 509 | }
|
---|
| 510 | }
|
---|
| 511 |
|
---|
| 512 | /*the following function does the same as sscanf(pos2, "%d", &sec)*/
|
---|
| 513 | /*this function only exists because some of platforms do not have sscanf. */
|
---|
| 514 | static int ParseStringToDecimal(const char *src, int* dst)
|
---|
| 515 | {
|
---|
| 516 | int result;
|
---|
| 517 | char* next;
|
---|
| 518 |
|
---|
| 519 | (*dst) = (int)strtol(src, &next, 0);
|
---|
| 520 | if ((src == next) || ((((*dst) == INT_MAX) || ((*dst) == INT_MIN)) && (errno != 0)))
|
---|
| 521 | {
|
---|
| 522 | result = __LINE__;
|
---|
| 523 | }
|
---|
| 524 | else
|
---|
| 525 | {
|
---|
| 526 | result = 0;
|
---|
| 527 | }
|
---|
| 528 |
|
---|
| 529 | return result;
|
---|
| 530 | }
|
---|
| 531 |
|
---|
| 532 | /*the following function does the same as sscanf(buf, "HTTP/%*d.%*d %d %*[^\r\n]", &ret) */
|
---|
| 533 | /*this function only exists because some of platforms do not have sscanf. This is not a full implementation; it only works with well-defined HTTP response. */
|
---|
| 534 | static int ParseHttpResponse(const char* src, int* dst)
|
---|
| 535 | {
|
---|
| 536 | int result;
|
---|
| 537 | static const char HTTPPrefix[] = "HTTP/";
|
---|
| 538 | bool fail;
|
---|
| 539 | const char* runPrefix;
|
---|
| 540 |
|
---|
| 541 | if ((src == NULL) || (dst == NULL))
|
---|
| 542 | {
|
---|
| 543 | result = __LINE__;
|
---|
| 544 | }
|
---|
| 545 | else
|
---|
| 546 | {
|
---|
| 547 | fail = false;
|
---|
| 548 | runPrefix = HTTPPrefix;
|
---|
| 549 |
|
---|
| 550 | while ((*runPrefix) != '\0')
|
---|
| 551 | {
|
---|
| 552 | if ((*runPrefix) != (*src))
|
---|
| 553 | {
|
---|
| 554 | fail = true;
|
---|
| 555 | break;
|
---|
| 556 | }
|
---|
| 557 | src++;
|
---|
| 558 | runPrefix++;
|
---|
| 559 | }
|
---|
| 560 |
|
---|
| 561 | if (!fail)
|
---|
| 562 | {
|
---|
| 563 | while ((*src) != '.')
|
---|
| 564 | {
|
---|
| 565 | if ((*src) == '\0')
|
---|
| 566 | {
|
---|
| 567 | fail = true;
|
---|
| 568 | break;
|
---|
| 569 | }
|
---|
| 570 | src++;
|
---|
| 571 | }
|
---|
| 572 | }
|
---|
| 573 |
|
---|
| 574 | if (!fail)
|
---|
| 575 | {
|
---|
| 576 | while ((*src) != ' ')
|
---|
| 577 | {
|
---|
| 578 | if ((*src) == '\0')
|
---|
| 579 | {
|
---|
| 580 | fail = true;
|
---|
| 581 | break;
|
---|
| 582 | }
|
---|
| 583 | src++;
|
---|
| 584 | }
|
---|
| 585 | }
|
---|
| 586 |
|
---|
| 587 | if (fail)
|
---|
| 588 | {
|
---|
| 589 | result = __LINE__;
|
---|
| 590 | }
|
---|
| 591 | else
|
---|
| 592 | {
|
---|
| 593 | if (ParseStringToDecimal(src, dst) != 0)
|
---|
| 594 | {
|
---|
| 595 | result = __LINE__;
|
---|
| 596 | }
|
---|
| 597 | else
|
---|
| 598 | {
|
---|
| 599 | result = 0;
|
---|
| 600 | }
|
---|
| 601 | }
|
---|
| 602 | }
|
---|
| 603 |
|
---|
| 604 | return result;
|
---|
| 605 | }
|
---|
| 606 |
|
---|
| 607 | static void on_underlying_io_bytes_received(void* context, const unsigned char* buffer, size_t size)
|
---|
| 608 | {
|
---|
| 609 | if (context == NULL)
|
---|
| 610 | {
|
---|
| 611 | /* Codes_SRS_HTTP_PROXY_IO_01_082: [ on_underlying_io_bytes_received called with NULL context shall do nothing. ]*/
|
---|
| 612 | LogError("NULL context in on_underlying_io_bytes_received");
|
---|
| 613 | }
|
---|
| 614 | else
|
---|
| 615 | {
|
---|
| 616 | HTTP_PROXY_IO_INSTANCE* http_proxy_io_instance = (HTTP_PROXY_IO_INSTANCE*)context;
|
---|
| 617 |
|
---|
| 618 | switch (http_proxy_io_instance->http_proxy_io_state)
|
---|
| 619 | {
|
---|
| 620 | default:
|
---|
| 621 | case HTTP_PROXY_IO_STATE_CLOSING:
|
---|
| 622 | LogError("Bytes received in invalid state");
|
---|
| 623 | break;
|
---|
| 624 |
|
---|
| 625 | case HTTP_PROXY_IO_STATE_OPENING_UNDERLYING_IO:
|
---|
| 626 | /* Codes_SRS_HTTP_PROXY_IO_01_080: [ If on_underlying_io_bytes_received is called while the underlying IO is being opened, the on_open_complete callback shall be triggered with IO_OPEN_ERROR, passing also the on_open_complete_context argument as context. ]*/
|
---|
| 627 | LogError("Bytes received while opening underlying IO");
|
---|
| 628 | indicate_open_complete_error_and_close(http_proxy_io_instance);
|
---|
| 629 | break;
|
---|
| 630 |
|
---|
| 631 | case HTTP_PROXY_IO_STATE_WAITING_FOR_CONNECT_RESPONSE:
|
---|
| 632 | {
|
---|
| 633 | /* Codes_SRS_HTTP_PROXY_IO_01_065: [ When bytes are received and the response to the CONNECT request was not yet received, the bytes shall be accumulated until a double new-line is detected. ]*/
|
---|
| 634 | unsigned char* new_receive_buffer = (unsigned char*)realloc(http_proxy_io_instance->receive_buffer, http_proxy_io_instance->receive_buffer_size + size + 1);
|
---|
| 635 | if (new_receive_buffer == NULL)
|
---|
| 636 | {
|
---|
| 637 | /* Codes_SRS_HTTP_PROXY_IO_01_067: [ If allocating memory for the buffered bytes fails, the on_open_complete callback shall be triggered with IO_OPEN_ERROR, passing also the on_open_complete_context argument as context. ]*/
|
---|
| 638 | LogError("Cannot allocate memory for received data");
|
---|
| 639 | indicate_open_complete_error_and_close(http_proxy_io_instance);
|
---|
| 640 | }
|
---|
| 641 | else
|
---|
| 642 | {
|
---|
| 643 | http_proxy_io_instance->receive_buffer = new_receive_buffer;
|
---|
| 644 | memcpy(http_proxy_io_instance->receive_buffer + http_proxy_io_instance->receive_buffer_size, buffer, size);
|
---|
| 645 | http_proxy_io_instance->receive_buffer_size += size;
|
---|
| 646 | }
|
---|
| 647 |
|
---|
| 648 | if (http_proxy_io_instance->receive_buffer_size >= 4)
|
---|
| 649 | {
|
---|
| 650 | const char* request_end_ptr;
|
---|
| 651 |
|
---|
| 652 | http_proxy_io_instance->receive_buffer[http_proxy_io_instance->receive_buffer_size] = 0;
|
---|
| 653 |
|
---|
| 654 | /* Codes_SRS_HTTP_PROXY_IO_01_066: [ When a double new-line is detected the response shall be parsed in order to extract the status code. ]*/
|
---|
| 655 | if ((http_proxy_io_instance->receive_buffer_size >= 4) &&
|
---|
| 656 | ((request_end_ptr = strstr((const char*)http_proxy_io_instance->receive_buffer, "\r\n\r\n")) != NULL))
|
---|
| 657 | {
|
---|
| 658 | int status_code;
|
---|
| 659 |
|
---|
| 660 | /* This part should really be done with the HTTPAPI, but that has to be done as a separate step
|
---|
| 661 | as the HTTPAPI has to expose somehow the underlying IO and currently this would be a too big of a change. */
|
---|
| 662 |
|
---|
| 663 | if (ParseHttpResponse((const char*)http_proxy_io_instance->receive_buffer, &status_code) != 0)
|
---|
| 664 | {
|
---|
| 665 | /* Codes_SRS_HTTP_PROXY_IO_01_068: [ If parsing the CONNECT response fails, the on_open_complete callback shall be triggered with IO_OPEN_ERROR, passing also the on_open_complete_context argument as context. ]*/
|
---|
| 666 | LogError("Cannot decode HTTP response");
|
---|
| 667 | indicate_open_complete_error_and_close(http_proxy_io_instance);
|
---|
| 668 | }
|
---|
| 669 | /* Codes_SRS_HTTP_PROXY_IO_01_069: [ Any successful (2xx) response to a CONNECT request indicates that the proxy has established a connection to the requested host and port, and has switched to tunneling the current connection to that server connection. ]*/
|
---|
| 670 | /* Codes_SRS_HTTP_PROXY_IO_01_090: [ Any successful (2xx) response to a CONNECT request indicates that the proxy has established a connection to the requested host and port, and has switched to tunneling the current connection to that server connection. ]*/
|
---|
| 671 | else if ((status_code < 200) || (status_code > 299))
|
---|
| 672 | {
|
---|
| 673 | /* Codes_SRS_HTTP_PROXY_IO_01_071: [ If the status code is not successful, the on_open_complete callback shall be triggered with IO_OPEN_ERROR, passing also the on_open_complete_context argument as context. ]*/
|
---|
| 674 | LogError("Bad status (%d) received in CONNECT response", status_code);
|
---|
| 675 | indicate_open_complete_error_and_close(http_proxy_io_instance);
|
---|
| 676 | }
|
---|
| 677 | else
|
---|
| 678 | {
|
---|
| 679 | size_t length_remaining = http_proxy_io_instance->receive_buffer + http_proxy_io_instance->receive_buffer_size - ((const unsigned char *)request_end_ptr + 4);
|
---|
| 680 |
|
---|
| 681 | /* Codes_SRS_HTTP_PROXY_IO_01_073: [ Once a success status code was parsed, the IO shall be OPEN. ]*/
|
---|
| 682 | http_proxy_io_instance->http_proxy_io_state = HTTP_PROXY_IO_STATE_OPEN;
|
---|
| 683 | /* Codes_SRS_HTTP_PROXY_IO_01_070: [ When a success status code is parsed, the on_open_complete callback shall be triggered with IO_OPEN_OK, passing also the on_open_complete_context argument as context. ]*/
|
---|
| 684 | http_proxy_io_instance->on_io_open_complete(http_proxy_io_instance->on_io_open_complete_context, IO_OPEN_OK);
|
---|
| 685 |
|
---|
| 686 | if (length_remaining > 0)
|
---|
| 687 | {
|
---|
| 688 | /* Codes_SRS_HTTP_PROXY_IO_01_072: [ Any bytes that are extra (not consumed by the CONNECT response), shall be indicated as received by calling the on_bytes_received callback and passing the on_bytes_received_context as context argument. ]*/
|
---|
| 689 | http_proxy_io_instance->on_bytes_received(http_proxy_io_instance->on_bytes_received_context, (const unsigned char*)request_end_ptr + 4, length_remaining);
|
---|
| 690 | }
|
---|
| 691 | }
|
---|
| 692 | }
|
---|
| 693 | }
|
---|
| 694 | break;
|
---|
| 695 | }
|
---|
| 696 | case HTTP_PROXY_IO_STATE_OPEN:
|
---|
| 697 | /* Codes_SRS_HTTP_PROXY_IO_01_074: [ If on_underlying_io_bytes_received is called while OPEN, all bytes shall be indicated as received by calling the on_bytes_received callback and passing the on_bytes_received_context as context argument. ]*/
|
---|
| 698 | http_proxy_io_instance->on_bytes_received(http_proxy_io_instance->on_bytes_received_context, buffer, size);
|
---|
| 699 | break;
|
---|
| 700 | }
|
---|
| 701 | }
|
---|
| 702 | }
|
---|
| 703 |
|
---|
| 704 | static int http_proxy_io_open(CONCRETE_IO_HANDLE http_proxy_io, 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)
|
---|
| 705 | {
|
---|
| 706 | int result;
|
---|
| 707 |
|
---|
| 708 | /* Codes_SRS_HTTP_PROXY_IO_01_051: [ The arguments on_io_open_complete_context, on_bytes_received_context and on_io_error_context shall be allowed to be NULL. ]*/
|
---|
| 709 | /* Codes_SRS_HTTP_PROXY_IO_01_018: [ If any of the arguments http_proxy_io, on_io_open_complete, on_bytes_received or on_io_error are NULL then http_proxy_io_open shall return a non-zero value. ]*/
|
---|
| 710 | if ((http_proxy_io == NULL) ||
|
---|
| 711 | (on_io_open_complete == NULL) ||
|
---|
| 712 | (on_bytes_received == NULL) ||
|
---|
| 713 | (on_io_error == NULL))
|
---|
| 714 | {
|
---|
| 715 | LogError("Bad arguments: http_proxy_io = %p, on_io_open_complete = %p, on_bytes_received = %p, on_io_error_context = %p.",
|
---|
| 716 | http_proxy_io,
|
---|
| 717 | on_io_open_complete,
|
---|
| 718 | on_bytes_received,
|
---|
| 719 | on_io_error);
|
---|
| 720 | result = __LINE__;
|
---|
| 721 | }
|
---|
| 722 | else
|
---|
| 723 | {
|
---|
| 724 | HTTP_PROXY_IO_INSTANCE* http_proxy_io_instance = (HTTP_PROXY_IO_INSTANCE*)http_proxy_io;
|
---|
| 725 |
|
---|
| 726 | if (http_proxy_io_instance->http_proxy_io_state != HTTP_PROXY_IO_STATE_CLOSED)
|
---|
| 727 | {
|
---|
| 728 | LogError("Invalid tlsio_state. Expected state is HTTP_PROXY_IO_STATE_CLOSED.");
|
---|
| 729 | result = __LINE__;
|
---|
| 730 | }
|
---|
| 731 | else
|
---|
| 732 | {
|
---|
| 733 | http_proxy_io_instance->on_bytes_received = on_bytes_received;
|
---|
| 734 | http_proxy_io_instance->on_bytes_received_context = on_bytes_received_context;
|
---|
| 735 |
|
---|
| 736 | http_proxy_io_instance->on_io_error = on_io_error;
|
---|
| 737 | http_proxy_io_instance->on_io_error_context = on_io_error_context;
|
---|
| 738 |
|
---|
| 739 | http_proxy_io_instance->on_io_open_complete = on_io_open_complete;
|
---|
| 740 | http_proxy_io_instance->on_io_open_complete_context = on_io_open_complete_context;
|
---|
| 741 |
|
---|
| 742 | http_proxy_io_instance->http_proxy_io_state = HTTP_PROXY_IO_STATE_OPENING_UNDERLYING_IO;
|
---|
| 743 |
|
---|
| 744 | /* Codes_SRS_HTTP_PROXY_IO_01_019: [ http_proxy_io_open shall open the underlying IO by calling xio_open on the underlying IO handle created in http_proxy_io_create, while passing to it the callbacks on_underlying_io_open_complete, on_underlying_io_bytes_received and on_underlying_io_error. ]*/
|
---|
| 745 | if (xio_open(http_proxy_io_instance->underlying_io, on_underlying_io_open_complete, http_proxy_io_instance, on_underlying_io_bytes_received, http_proxy_io_instance, on_underlying_io_error, http_proxy_io_instance) != 0)
|
---|
| 746 | {
|
---|
| 747 | /* Codes_SRS_HTTP_PROXY_IO_01_020: [ If xio_open fails, then http_proxy_io_open shall return a non-zero value. ]*/
|
---|
| 748 | http_proxy_io_instance->http_proxy_io_state = HTTP_PROXY_IO_STATE_CLOSED;
|
---|
| 749 | LogError("Cannot open the underlying IO.");
|
---|
| 750 | result = __LINE__;
|
---|
| 751 | }
|
---|
| 752 | else
|
---|
| 753 | {
|
---|
| 754 | /* Codes_SRS_HTTP_PROXY_IO_01_017: [ http_proxy_io_open shall open the HTTP proxy IO and on success it shall return 0. ]*/
|
---|
| 755 | result = 0;
|
---|
| 756 | }
|
---|
| 757 | }
|
---|
| 758 | }
|
---|
| 759 |
|
---|
| 760 | return result;
|
---|
| 761 | }
|
---|
| 762 |
|
---|
| 763 | static int http_proxy_io_close(CONCRETE_IO_HANDLE http_proxy_io, ON_IO_CLOSE_COMPLETE on_io_close_complete, void* on_io_close_complete_context)
|
---|
| 764 | {
|
---|
| 765 | int result = 0;
|
---|
| 766 |
|
---|
| 767 | /* Codes_SRS_HTTP_PROXY_IO_01_052: [ on_io_close_complete_context shall be allowed to be NULL. ]*/
|
---|
| 768 | /* Codes_SRS_HTTP_PROXY_IO_01_028: [ on_io_close_complete shall be allowed to be NULL. ]*/
|
---|
| 769 | if (http_proxy_io == NULL)
|
---|
| 770 | {
|
---|
| 771 | /* Codes_SRS_HTTP_PROXY_IO_01_023: [ If the argument http_proxy_io is NULL, http_proxy_io_close shall fail and return a non-zero value. ]*/
|
---|
| 772 | result = __LINE__;
|
---|
| 773 | LogError("NULL http_proxy_io.");
|
---|
| 774 | }
|
---|
| 775 | else
|
---|
| 776 | {
|
---|
| 777 | HTTP_PROXY_IO_INSTANCE* http_proxy_io_instance = (HTTP_PROXY_IO_INSTANCE*)http_proxy_io;
|
---|
| 778 |
|
---|
| 779 | /* Codes_SRS_HTTP_PROXY_IO_01_027: [ If http_proxy_io_close is called when not open, http_proxy_io_close shall fail and return a non-zero value. ]*/
|
---|
| 780 | if ((http_proxy_io_instance->http_proxy_io_state == HTTP_PROXY_IO_STATE_CLOSED) ||
|
---|
| 781 | /* Codes_SRS_HTTP_PROXY_IO_01_054: [ http_proxy_io_close while OPENING shall fail and return a non-zero value. ]*/
|
---|
| 782 | (http_proxy_io_instance->http_proxy_io_state == HTTP_PROXY_IO_STATE_CLOSING))
|
---|
| 783 | {
|
---|
| 784 | result = __LINE__;
|
---|
| 785 | LogError("Invalid tlsio_state. Expected state is HTTP_PROXY_IO_STATE_OPEN.");
|
---|
| 786 | }
|
---|
| 787 | else if ((http_proxy_io_instance->http_proxy_io_state == HTTP_PROXY_IO_STATE_OPENING_UNDERLYING_IO) ||
|
---|
| 788 | (http_proxy_io_instance->http_proxy_io_state == HTTP_PROXY_IO_STATE_WAITING_FOR_CONNECT_RESPONSE))
|
---|
| 789 | {
|
---|
| 790 | /* Codes_SRS_HTTP_PROXY_IO_01_053: [ http_proxy_io_close while OPENING shall trigger the on_io_open_complete callback with IO_OPEN_CANCELLED. ]*/
|
---|
| 791 | http_proxy_io_instance->http_proxy_io_state = HTTP_PROXY_IO_STATE_CLOSED;
|
---|
| 792 | (void)xio_close(http_proxy_io_instance->underlying_io, NULL, NULL);
|
---|
| 793 | http_proxy_io_instance->on_io_open_complete(http_proxy_io_instance->on_io_open_complete_context, IO_OPEN_CANCELLED);
|
---|
| 794 |
|
---|
| 795 | /* Codes_SRS_HTTP_PROXY_IO_01_022: [ http_proxy_io_close shall close the HTTP proxy IO and on success it shall return 0. ]*/
|
---|
| 796 | result = 0;
|
---|
| 797 | }
|
---|
| 798 | else
|
---|
| 799 | {
|
---|
| 800 | HTTP_PROXY_IO_STATE previous_state = http_proxy_io_instance->http_proxy_io_state;
|
---|
| 801 |
|
---|
| 802 | http_proxy_io_instance->http_proxy_io_state = HTTP_PROXY_IO_STATE_CLOSING;
|
---|
| 803 |
|
---|
| 804 | /* Codes_SRS_HTTP_PROXY_IO_01_026: [ The on_io_close_complete and on_io_close_complete_context arguments shall be saved for later use. ]*/
|
---|
| 805 | http_proxy_io_instance->on_io_close_complete = on_io_close_complete;
|
---|
| 806 | http_proxy_io_instance->on_io_close_complete_context = on_io_close_complete_context;
|
---|
| 807 |
|
---|
| 808 | /* Codes_SRS_HTTP_PROXY_IO_01_024: [ http_proxy_io_close shall close the underlying IO by calling xio_close on the IO handle create in http_proxy_io_create, while passing to it the on_underlying_io_close_complete callback. ]*/
|
---|
| 809 | if (xio_close(http_proxy_io_instance->underlying_io, on_underlying_io_close_complete, http_proxy_io_instance) != 0)
|
---|
| 810 | {
|
---|
| 811 | /* Codes_SRS_HTTP_PROXY_IO_01_025: [ If xio_close fails, http_proxy_io_close shall fail and return a non-zero value. ]*/
|
---|
| 812 | result = __LINE__;
|
---|
| 813 | http_proxy_io_instance->http_proxy_io_state = previous_state;
|
---|
| 814 | LogError("Cannot close underlying IO.");
|
---|
| 815 | }
|
---|
| 816 | else
|
---|
| 817 | {
|
---|
| 818 | /* Codes_SRS_HTTP_PROXY_IO_01_022: [ http_proxy_io_close shall close the HTTP proxy IO and on success it shall return 0. ]*/
|
---|
| 819 | result = 0;
|
---|
| 820 | }
|
---|
| 821 | }
|
---|
| 822 | }
|
---|
| 823 |
|
---|
| 824 | return result;
|
---|
| 825 | }
|
---|
| 826 |
|
---|
| 827 | static int http_proxy_io_send(CONCRETE_IO_HANDLE http_proxy_io, const void* buffer, size_t size, ON_SEND_COMPLETE on_send_complete, void* on_send_complete_context)
|
---|
| 828 | {
|
---|
| 829 | int result;
|
---|
| 830 |
|
---|
| 831 | /* Codes_SRS_HTTP_PROXY_IO_01_032: [ on_send_complete shall be allowed to be NULL. ]*/
|
---|
| 832 | /* Codes_SRS_HTTP_PROXY_IO_01_030: [ If any of the arguments http_proxy_io or buffer is NULL, http_proxy_io_send shall fail and return a non-zero value. ]*/
|
---|
| 833 | if ((http_proxy_io == NULL) ||
|
---|
| 834 | (buffer == NULL) ||
|
---|
| 835 | /* Codes_SRS_HTTP_PROXY_IO_01_031: [ If size is 0, http_proxy_io_send shall fail and return a non-zero value. ]*/
|
---|
| 836 | (size == 0))
|
---|
| 837 | {
|
---|
| 838 | result = __LINE__;
|
---|
| 839 | LogError("Bad arguments: http_proxy_io = %p, buffer = %p.",
|
---|
| 840 | http_proxy_io, buffer);
|
---|
| 841 | }
|
---|
| 842 | else
|
---|
| 843 | {
|
---|
| 844 | HTTP_PROXY_IO_INSTANCE* http_proxy_io_instance = (HTTP_PROXY_IO_INSTANCE*)http_proxy_io;
|
---|
| 845 |
|
---|
| 846 | /* Codes_SRS_HTTP_PROXY_IO_01_034: [ If http_proxy_io_send is called when the IO is not open, http_proxy_io_send shall fail and return a non-zero value. ]*/
|
---|
| 847 | /* Codes_SRS_HTTP_PROXY_IO_01_035: [ If the IO is in an error state (an error was reported through the on_io_error callback), http_proxy_io_send shall fail and return a non-zero value. ]*/
|
---|
| 848 | if (http_proxy_io_instance->http_proxy_io_state != HTTP_PROXY_IO_STATE_OPEN)
|
---|
| 849 | {
|
---|
| 850 | result = __LINE__;
|
---|
| 851 | LogError("Invalid HTTP proxy IO state. Expected state is HTTP_PROXY_IO_STATE_OPEN.");
|
---|
| 852 | }
|
---|
| 853 | else
|
---|
| 854 | {
|
---|
| 855 | /* Codes_SRS_HTTP_PROXY_IO_01_033: [ http_proxy_io_send shall send the bytes by calling xio_send on the underlying IO created in http_proxy_io_create and passing buffer and size as arguments. ]*/
|
---|
| 856 | if (xio_send(http_proxy_io_instance->underlying_io, buffer, size, on_send_complete, on_send_complete_context) != 0)
|
---|
| 857 | {
|
---|
| 858 | /* Codes_SRS_HTTP_PROXY_IO_01_055: [ If xio_send fails, http_proxy_io_send shall fail and return a non-zero value. ]*/
|
---|
| 859 | result = __LINE__;
|
---|
| 860 | LogError("Underlying xio_send failed.");
|
---|
| 861 | }
|
---|
| 862 | else
|
---|
| 863 | {
|
---|
| 864 | /* Codes_SRS_HTTP_PROXY_IO_01_029: [ http_proxy_io_send shall send the size bytes pointed to by buffer and on success it shall return 0. ]*/
|
---|
| 865 | result = 0;
|
---|
| 866 | }
|
---|
| 867 | }
|
---|
| 868 | }
|
---|
| 869 |
|
---|
| 870 | return result;
|
---|
| 871 | }
|
---|
| 872 |
|
---|
| 873 | static void http_proxy_io_dowork(CONCRETE_IO_HANDLE http_proxy_io)
|
---|
| 874 | {
|
---|
| 875 | if (http_proxy_io == NULL)
|
---|
| 876 | {
|
---|
| 877 | /* Codes_SRS_HTTP_PROXY_IO_01_038: [ If the http_proxy_io argument is NULL, http_proxy_io_dowork shall do nothing. ]*/
|
---|
| 878 | LogError("NULL http_proxy_io.");
|
---|
| 879 | }
|
---|
| 880 | else
|
---|
| 881 | {
|
---|
| 882 | HTTP_PROXY_IO_INSTANCE* http_proxy_io_instance = (HTTP_PROXY_IO_INSTANCE*)http_proxy_io;
|
---|
| 883 |
|
---|
| 884 | if (http_proxy_io_instance->http_proxy_io_state != HTTP_PROXY_IO_STATE_CLOSED)
|
---|
| 885 | {
|
---|
| 886 | /* Codes_SRS_HTTP_PROXY_IO_01_037: [ http_proxy_io_dowork shall call xio_dowork on the underlying IO created in http_proxy_io_create. ]*/
|
---|
| 887 | xio_dowork(http_proxy_io_instance->underlying_io);
|
---|
| 888 | }
|
---|
| 889 | }
|
---|
| 890 | }
|
---|
| 891 |
|
---|
| 892 | static int http_proxy_io_set_option(CONCRETE_IO_HANDLE http_proxy_io, const char* option_name, const void* value)
|
---|
| 893 | {
|
---|
| 894 | int result;
|
---|
| 895 |
|
---|
| 896 | if ((http_proxy_io == NULL) || (option_name == NULL))
|
---|
| 897 | {
|
---|
| 898 | /* Codes_SRS_HTTP_PROXY_IO_01_040: [ If any of the arguments http_proxy_io or option_name is NULL, http_proxy_io_set_option shall return a non-zero value. ]*/
|
---|
| 899 | LogError("Bad arguments: http_proxy_io = %p, option_name = %p",
|
---|
| 900 | http_proxy_io, option_name);
|
---|
| 901 | result = MU_FAILURE;
|
---|
| 902 | }
|
---|
| 903 | else
|
---|
| 904 | {
|
---|
| 905 | HTTP_PROXY_IO_INSTANCE* http_proxy_io_instance = (HTTP_PROXY_IO_INSTANCE*)http_proxy_io;
|
---|
| 906 |
|
---|
| 907 | /* Codes_SRS_HTTP_PROXY_IO_01_045: [ None. ]*/
|
---|
| 908 |
|
---|
| 909 | if (strcmp(option_name, OPTION_UNDERLYING_IO_OPTIONS) == 0)
|
---|
| 910 | {
|
---|
| 911 | if (OptionHandler_FeedOptions((OPTIONHANDLER_HANDLE)value, (void*)http_proxy_io_instance->underlying_io) != OPTIONHANDLER_OK)
|
---|
| 912 | {
|
---|
| 913 | LogError("failed feeding options to underlying I/O instance");
|
---|
| 914 | result = MU_FAILURE;
|
---|
| 915 | }
|
---|
| 916 | else
|
---|
| 917 | {
|
---|
| 918 | result = 0;
|
---|
| 919 | }
|
---|
| 920 | }
|
---|
| 921 | /* Codes_SRS_HTTP_PROXY_IO_01_043: [ If the option_name argument indicates an option that is not handled by http_proxy_io_set_option, then xio_setoption shall be called on the underlying IO created in http_proxy_io_create, passing the option name and value to it. ]*/
|
---|
| 922 | /* Codes_SRS_HTTP_PROXY_IO_01_056: [ The value argument shall be allowed to be NULL. ]*/
|
---|
| 923 | else if (xio_setoption(http_proxy_io_instance->underlying_io, option_name, value) != 0)
|
---|
| 924 | {
|
---|
| 925 | /* Codes_SRS_HTTP_PROXY_IO_01_044: [ if xio_setoption fails, http_proxy_io_set_option shall return a non-zero value. ]*/
|
---|
| 926 | LogError("Unrecognized option %s", option_name);
|
---|
| 927 | result = MU_FAILURE;
|
---|
| 928 | }
|
---|
| 929 | else
|
---|
| 930 | {
|
---|
| 931 | /* Codes_SRS_HTTP_PROXY_IO_01_042: [ If the option was handled by http_proxy_io_set_option or the underlying IO, then http_proxy_io_set_option shall return 0. ]*/
|
---|
| 932 | result = 0;
|
---|
| 933 | }
|
---|
| 934 | }
|
---|
| 935 |
|
---|
| 936 | return result;
|
---|
| 937 | }
|
---|
| 938 |
|
---|
| 939 | /*this function will clone an option given by name and value*/
|
---|
| 940 | static void* http_proxy_io_clone_option(const char* name, const void* value)
|
---|
| 941 | {
|
---|
| 942 | void* result;
|
---|
| 943 | if (
|
---|
| 944 | (name == NULL) || (value == NULL)
|
---|
| 945 | )
|
---|
| 946 | {
|
---|
| 947 | LogError("invalid parameter detected: name=%p, value=%p", name, value);
|
---|
| 948 | result = NULL;
|
---|
| 949 | }
|
---|
| 950 | else
|
---|
| 951 | {
|
---|
| 952 | if (strcmp(name, OPTION_UNDERLYING_IO_OPTIONS) == 0)
|
---|
| 953 | {
|
---|
| 954 | result = (void*)value;
|
---|
| 955 | }
|
---|
| 956 | else
|
---|
| 957 | {
|
---|
| 958 | LogError("not handled option : %s", name);
|
---|
| 959 | result = NULL;
|
---|
| 960 | }
|
---|
| 961 | }
|
---|
| 962 |
|
---|
| 963 | return result;
|
---|
| 964 | }
|
---|
| 965 |
|
---|
| 966 | /*this function destroys an option previously created*/
|
---|
| 967 | static void http_proxy_io_destroy_option(const char* name, const void* value)
|
---|
| 968 | {
|
---|
| 969 | /*since all options for this layer are actually string copies., disposing of one is just calling free*/
|
---|
| 970 | if (
|
---|
| 971 | (name == NULL) || (value == NULL)
|
---|
| 972 | )
|
---|
| 973 | {
|
---|
| 974 | LogError("invalid parameter detected: const char* name=%p, const void* value=%p", name, value);
|
---|
| 975 | }
|
---|
| 976 | else
|
---|
| 977 | {
|
---|
| 978 | if (strcmp(name, OPTION_UNDERLYING_IO_OPTIONS) == 0)
|
---|
| 979 | {
|
---|
| 980 | OptionHandler_Destroy((OPTIONHANDLER_HANDLE)value);
|
---|
| 981 | }
|
---|
| 982 | else
|
---|
| 983 | {
|
---|
| 984 | LogError("not handled option : %s", name);
|
---|
| 985 | }
|
---|
| 986 | }
|
---|
| 987 | }
|
---|
| 988 |
|
---|
| 989 | static OPTIONHANDLER_HANDLE http_proxy_io_retrieve_options(CONCRETE_IO_HANDLE http_proxy_io)
|
---|
| 990 | {
|
---|
| 991 | OPTIONHANDLER_HANDLE result;
|
---|
| 992 |
|
---|
| 993 | if (http_proxy_io == NULL)
|
---|
| 994 | {
|
---|
| 995 | /* Codes_SRS_HTTP_PROXY_IO_01_047: [ If the parameter http_proxy_io is NULL then http_proxy_io_retrieve_options shall fail and return NULL. ]*/
|
---|
| 996 | LogError("invalid parameter detected: CONCRETE_IO_HANDLE handle=%p", http_proxy_io);
|
---|
| 997 | result = NULL;
|
---|
| 998 | }
|
---|
| 999 | else
|
---|
| 1000 | {
|
---|
| 1001 | HTTP_PROXY_IO_INSTANCE* http_proxy_io_instance = (HTTP_PROXY_IO_INSTANCE*)http_proxy_io;
|
---|
| 1002 |
|
---|
| 1003 | result = OptionHandler_Create(http_proxy_io_clone_option, http_proxy_io_destroy_option, http_proxy_io_set_option);
|
---|
| 1004 |
|
---|
| 1005 | if (result == NULL)
|
---|
| 1006 | {
|
---|
| 1007 | LogError("OptionHandler_Create failed");
|
---|
| 1008 | }
|
---|
| 1009 | else
|
---|
| 1010 | {
|
---|
| 1011 | OPTIONHANDLER_HANDLE underlying_io_options;
|
---|
| 1012 |
|
---|
| 1013 | /* Codes_SRS_HTTP_PROXY_IO_01_046: [ http_proxy_io_retrieve_options shall return an OPTIONHANDLER_HANDLE obtained by calling xio_retrieveoptions on the underlying IO created in http_proxy_io_create. ]*/
|
---|
| 1014 | if ((underlying_io_options = xio_retrieveoptions(http_proxy_io_instance->underlying_io)) == NULL ||
|
---|
| 1015 | OptionHandler_AddOption(result, OPTION_UNDERLYING_IO_OPTIONS, underlying_io_options) != OPTIONHANDLER_OK)
|
---|
| 1016 | {
|
---|
| 1017 | /* Codes_SRS_HTTP_PROXY_IO_01_048: [ If xio_retrieveoptions fails, http_proxy_io_retrieve_options shall return NULL. ]*/
|
---|
| 1018 | LogError("unable to save underlying_io options");
|
---|
| 1019 | OptionHandler_Destroy(underlying_io_options);
|
---|
| 1020 | OptionHandler_Destroy(result);
|
---|
| 1021 | result = NULL;
|
---|
| 1022 | }
|
---|
| 1023 | else
|
---|
| 1024 | {
|
---|
| 1025 | // All is fine.
|
---|
| 1026 | }
|
---|
| 1027 | }
|
---|
| 1028 | }
|
---|
| 1029 | return result;
|
---|
| 1030 | }
|
---|
| 1031 |
|
---|
| 1032 | static const IO_INTERFACE_DESCRIPTION http_proxy_io_interface_description =
|
---|
| 1033 | {
|
---|
| 1034 | http_proxy_io_retrieve_options,
|
---|
| 1035 | http_proxy_io_create,
|
---|
| 1036 | http_proxy_io_destroy,
|
---|
| 1037 | http_proxy_io_open,
|
---|
| 1038 | http_proxy_io_close,
|
---|
| 1039 | http_proxy_io_send,
|
---|
| 1040 | http_proxy_io_dowork,
|
---|
| 1041 | http_proxy_io_set_option
|
---|
| 1042 | };
|
---|
| 1043 |
|
---|
| 1044 | const IO_INTERFACE_DESCRIPTION* http_proxy_io_get_interface_description(void)
|
---|
| 1045 | {
|
---|
| 1046 | /* Codes_SRS_HTTP_PROXY_IO_01_049: [ http_proxy_io_get_interface_description shall return a pointer to an IO_INTERFACE_DESCRIPTION structure that contains pointers to the functions: http_proxy_io_retrieve_options, http_proxy_io_retrieve_create, http_proxy_io_destroy, http_proxy_io_open, http_proxy_io_close, http_proxy_io_send and http_proxy_io_dowork. ]*/
|
---|
| 1047 | return &http_proxy_io_interface_description;
|
---|
| 1048 | }
|
---|