1 | #include "utility/w5500.h"
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2 | #include "utility/socket.h"
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3 |
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4 | extern "C" {
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5 | #include "string.h"
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6 | }
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7 |
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8 | #include "Arduino.h"
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9 |
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10 | #include "Ethernet2.h"
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11 | #include "EthernetClient.h"
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12 | #include "EthernetServer.h"
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13 | #include "Dns.h"
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14 |
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15 | uint16_t EthernetClient::_srcport = 1024;
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16 |
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17 | EthernetClient::EthernetClient() : _sock(MAX_SOCK_NUM) {
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18 | }
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19 |
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20 | EthernetClient::EthernetClient(uint8_t sock) : _sock(sock) {
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21 | }
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22 |
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23 | int EthernetClient::connect(const char* host, uint16_t port) {
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24 | // Look up the host first
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25 | int ret = 0;
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26 | DNSClient dns;
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27 | IPAddress remote_addr;
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28 |
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29 | dns.begin(Ethernet.dnsServerIP());
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30 | ret = dns.getHostByName(host, remote_addr);
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31 | if (ret == 1) {
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32 | return connect(remote_addr, port);
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33 | } else {
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34 | return ret;
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35 | }
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36 | }
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37 |
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38 | int EthernetClient::connect(IPAddress ip, uint16_t port) {
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39 | if (_sock != MAX_SOCK_NUM)
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40 | return 0;
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41 |
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42 | for (int i = 0; i < MAX_SOCK_NUM; i++) {
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43 | uint8_t s = w5500.readSnSR(i);
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44 | if (s == SnSR::CLOSED || s == SnSR::FIN_WAIT || s == SnSR::CLOSE_WAIT) {
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45 | _sock = i;
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46 | break;
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47 | }
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48 | }
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49 |
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50 | if (_sock == MAX_SOCK_NUM)
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51 | return 0;
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52 |
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53 | _srcport++;
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54 | if (_srcport == 0) _srcport = 1024;
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55 | socket(_sock, SnMR::TCP, _srcport, 0);
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56 |
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57 | if (!::connect(_sock, rawIPAddress(ip), port)) {
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58 | _sock = MAX_SOCK_NUM;
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59 | return 0;
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60 | }
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61 |
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62 | while (status() != SnSR::ESTABLISHED) {
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63 | delay(1);
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64 | if (status() == SnSR::CLOSED) {
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65 | _sock = MAX_SOCK_NUM;
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66 | return 0;
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67 | }
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68 | }
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69 |
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70 | return 1;
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71 | }
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72 |
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73 | size_t EthernetClient::write(uint8_t b) {
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74 | return write(&b, 1);
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75 | }
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76 |
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77 | size_t EthernetClient::write(const uint8_t *buf, size_t size) {
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78 | if (_sock == MAX_SOCK_NUM) {
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79 | setWriteError();
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80 | return 0;
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81 | }
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82 | if (!send(_sock, buf, size)) {
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83 | setWriteError();
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84 | return 0;
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85 | }
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86 | return size;
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87 | }
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88 |
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89 | int EthernetClient::available() {
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90 | if (_sock != MAX_SOCK_NUM)
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91 | return w5500.getRXReceivedSize(_sock);
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92 | return 0;
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93 | }
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94 |
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95 | int EthernetClient::read() {
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96 | uint8_t b;
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97 | if ( recv(_sock, &b, 1) > 0 )
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98 | {
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99 | // recv worked
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100 | return b;
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101 | }
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102 | else
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103 | {
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104 | // No data available
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105 | return -1;
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106 | }
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107 | }
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108 |
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109 | int EthernetClient::read(uint8_t *buf, size_t size) {
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110 | return recv(_sock, buf, size);
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111 | }
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112 |
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113 | int EthernetClient::peek() {
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114 | uint8_t b;
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115 | // Unlike recv, peek doesn't check to see if there's any data available, so we must
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116 | if (!available())
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117 | return -1;
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118 | ::peek(_sock, &b);
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119 | return b;
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120 | }
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121 |
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122 | void EthernetClient::flush() {
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123 | ::flush(_sock);
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124 | }
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125 |
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126 | void EthernetClient::stop() {
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127 | if (_sock == MAX_SOCK_NUM)
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128 | return;
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129 |
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130 | // attempt to close the connection gracefully (send a FIN to other side)
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131 | disconnect(_sock);
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132 | unsigned long start = millis();
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133 |
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134 | // wait a second for the connection to close
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135 | while (status() != SnSR::CLOSED && millis() - start < 1000)
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136 | delay(1);
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137 |
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138 | // if it hasn't closed, close it forcefully
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139 | if (status() != SnSR::CLOSED)
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140 | close(_sock);
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141 |
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142 | EthernetClass::_server_port[_sock] = 0;
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143 | _sock = MAX_SOCK_NUM;
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144 | }
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145 |
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146 | uint8_t EthernetClient::connected() {
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147 | if (_sock == MAX_SOCK_NUM) return 0;
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148 |
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149 | uint8_t s = status();
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150 | return !(s == SnSR::LISTEN || s == SnSR::CLOSED || s == SnSR::FIN_WAIT ||
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151 | (s == SnSR::CLOSE_WAIT && !available()));
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152 | }
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153 |
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154 | uint8_t EthernetClient::status() {
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155 | if (_sock == MAX_SOCK_NUM) return SnSR::CLOSED;
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156 | return w5500.readSnSR(_sock);
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157 | }
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158 |
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159 | // the next function allows us to use the client returned by
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160 | // EthernetServer::available() as the condition in an if-statement.
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161 |
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162 | EthernetClient::operator bool() {
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163 | return _sock != MAX_SOCK_NUM;
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164 | }
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165 |
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166 | bool EthernetClient::operator==(const EthernetClient& rhs) {
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167 | return _sock == rhs._sock && _sock != MAX_SOCK_NUM && rhs._sock != MAX_SOCK_NUM;
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168 | }
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