[136] | 1 | /*
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| 2 | Copyright (c) 2013 Arduino LLC. All right reserved.
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| 3 |
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| 4 | This library is free software; you can redistribute it and/or
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| 5 | modify it under the terms of the GNU Lesser General Public
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| 6 | License as published by the Free Software Foundation; either
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| 7 | version 2.1 of the License, or (at your option) any later version.
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| 8 |
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| 9 | This library is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 12 | Lesser General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU Lesser General Public
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| 15 | License along with this library; if not, write to the Free Software
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| 16 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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| 17 | */
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| 18 |
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| 19 | #include <YunClient.h>
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| 20 |
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| 21 | YunClient::YunClient(int _h, BridgeClass &_b) :
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| 22 | bridge(_b), handle(_h), opened(true), buffered(0) {
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| 23 | }
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| 24 |
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| 25 | YunClient::YunClient(BridgeClass &_b) :
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| 26 | bridge(_b), handle(0), opened(false), buffered(0) {
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| 27 | }
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| 28 |
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| 29 | YunClient::~YunClient() {
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| 30 | }
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| 31 |
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| 32 | YunClient& YunClient::operator=(const YunClient &_x) {
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| 33 | opened = _x.opened;
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| 34 | handle = _x.handle;
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| 35 | return *this;
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| 36 | }
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| 37 |
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| 38 | void YunClient::stop() {
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| 39 | if (opened) {
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| 40 | uint8_t cmd[] = {'j', handle};
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| 41 | bridge.transfer(cmd, 2);
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| 42 | }
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| 43 | opened = false;
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| 44 | }
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| 45 |
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| 46 | void YunClient::doBuffer() {
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| 47 | // If there are already char in buffer exit
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| 48 | if (buffered > 0)
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| 49 | return;
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| 50 |
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| 51 | // Try to buffer up to 32 characters
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| 52 | readPos = 0;
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| 53 | uint8_t cmd[] = {'K', handle, sizeof(buffer)};
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| 54 | buffered = bridge.transfer(cmd, 3, buffer, sizeof(buffer));
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| 55 | }
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| 56 |
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| 57 | int YunClient::available() {
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| 58 | // Look if there is new data available
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| 59 | doBuffer();
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| 60 | return buffered;
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| 61 | }
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| 62 |
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| 63 | int YunClient::read() {
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| 64 | doBuffer();
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| 65 | if (buffered == 0)
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| 66 | return -1; // no chars available
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| 67 | else {
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| 68 | buffered--;
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| 69 | return buffer[readPos++];
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| 70 | }
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| 71 | }
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| 72 |
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| 73 | int YunClient::read(uint8_t *buff, size_t size) {
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| 74 | int readed = 0;
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| 75 | do {
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| 76 | if (buffered == 0) {
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| 77 | doBuffer();
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| 78 | if (buffered == 0)
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| 79 | return readed;
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| 80 | }
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| 81 | buff[readed++] = buffer[readPos++];
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| 82 | buffered--;
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| 83 | } while (readed < size);
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| 84 | return readed;
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| 85 | }
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| 86 |
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| 87 | int YunClient::peek() {
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| 88 | doBuffer();
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| 89 | if (buffered == 0)
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| 90 | return -1; // no chars available
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| 91 | else
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| 92 | return buffer[readPos];
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| 93 | }
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| 94 |
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| 95 | size_t YunClient::write(uint8_t c) {
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| 96 | if (!opened)
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| 97 | return 0;
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| 98 | uint8_t cmd[] = {'l', handle, c};
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| 99 | bridge.transfer(cmd, 3);
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| 100 | return 1;
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| 101 | }
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| 102 |
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| 103 | size_t YunClient::write(const uint8_t *buf, size_t size) {
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| 104 | if (!opened)
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| 105 | return 0;
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| 106 | uint8_t cmd[] = {'l', handle};
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| 107 | bridge.transfer(cmd, 2, buf, size, NULL, 0);
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| 108 | return size;
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| 109 | }
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| 110 |
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| 111 | void YunClient::flush() {
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| 112 | }
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| 113 |
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| 114 | uint8_t YunClient::connected() {
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| 115 | if (!opened)
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| 116 | return false;
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| 117 | uint8_t cmd[] = {'L', handle};
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| 118 | uint8_t res[1];
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| 119 | bridge.transfer(cmd, 2, res, 1);
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| 120 | return (res[0] == 1);
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| 121 | }
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| 122 |
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| 123 | int YunClient::connect(IPAddress ip, uint16_t port) {
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| 124 | String address;
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| 125 | address.reserve(18);
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| 126 | address += ip[0];
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| 127 | address += '.';
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| 128 | address += ip[1];
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| 129 | address += '.';
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| 130 | address += ip[2];
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| 131 | address += '.';
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| 132 | address += ip[3];
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| 133 | return connect(address.c_str(), port);
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| 134 | }
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| 135 |
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| 136 | int YunClient::connect(const char *host, uint16_t port) {
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| 137 | uint8_t tmp[] = {
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| 138 | 'C',
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| 139 | (port >> 8) & 0xFF,
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| 140 | port & 0xFF
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| 141 | };
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| 142 | uint8_t res[1];
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| 143 | int l = bridge.transfer(tmp, 3, (const uint8_t *)host, strlen(host), res, 1);
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| 144 | if (l == 0)
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| 145 | return 0;
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| 146 | handle = res[0];
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| 147 |
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| 148 | // wait for connection
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| 149 | uint8_t tmp2[] = { 'c', handle };
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| 150 | uint8_t res2[1];
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| 151 | while (true) {
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| 152 | bridge.transfer(tmp2, 2, res2, 1);
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| 153 | if (res2[0] == 0)
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| 154 | break;
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| 155 | delay(1);
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| 156 | }
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| 157 | opened = true;
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| 158 |
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| 159 | // check for successful connection
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| 160 | if (connected())
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| 161 | return 1;
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| 162 |
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| 163 | stop();
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| 164 | handle = 0;
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| 165 | return 0;
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| 166 | }
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| 167 |
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