mayuresh bharmoria / Mbed OS mbed-os-example-wifi

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

esp8266-driver/TESTS/net/udp_packet_pressure/main.cpp@0:8f8e8f3cbd1c, 2018-06-21 (annotated)

Committer:
mayur098
Date:
Thu Jun 21 17:50:21 2018 +0000
Revision:
0:8f8e8f3cbd1c
first commit;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mayur098 0:8f8e8f3cbd1c 1 #ifndef MBED_EXTENDED_TESTS
mayur098 0:8f8e8f3cbd1c 2 #error [NOT_SUPPORTED] Pressure tests are not supported by default
mayur098 0:8f8e8f3cbd1c 3 #endif
mayur098 0:8f8e8f3cbd1c 4
mayur098 0:8f8e8f3cbd1c 5 #include "mbed.h"
mayur098 0:8f8e8f3cbd1c 6 #include "ESP8266Interface.h"
mayur098 0:8f8e8f3cbd1c 7 #include "UDPSocket.h"
mayur098 0:8f8e8f3cbd1c 8 #include "greentea-client/test_env.h"
mayur098 0:8f8e8f3cbd1c 9 #include "unity/unity.h"
mayur098 0:8f8e8f3cbd1c 10 #include "utest.h"
mayur098 0:8f8e8f3cbd1c 11
mayur098 0:8f8e8f3cbd1c 12 using namespace utest::v1;
mayur098 0:8f8e8f3cbd1c 13
mayur098 0:8f8e8f3cbd1c 14
mayur098 0:8f8e8f3cbd1c 15 #ifndef MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_MIN
mayur098 0:8f8e8f3cbd1c 16 #define MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_MIN 64
mayur098 0:8f8e8f3cbd1c 17 #endif
mayur098 0:8f8e8f3cbd1c 18
mayur098 0:8f8e8f3cbd1c 19 #ifndef MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_MAX
mayur098 0:8f8e8f3cbd1c 20 #define MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_MAX 0x80000
mayur098 0:8f8e8f3cbd1c 21 #endif
mayur098 0:8f8e8f3cbd1c 22
mayur098 0:8f8e8f3cbd1c 23 #ifndef MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_TIMEOUT
mayur098 0:8f8e8f3cbd1c 24 #define MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_TIMEOUT 100
mayur098 0:8f8e8f3cbd1c 25 #endif
mayur098 0:8f8e8f3cbd1c 26
mayur098 0:8f8e8f3cbd1c 27 #ifndef MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_SEED
mayur098 0:8f8e8f3cbd1c 28 #define MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_SEED 0x6d626564
mayur098 0:8f8e8f3cbd1c 29 #endif
mayur098 0:8f8e8f3cbd1c 30
mayur098 0:8f8e8f3cbd1c 31 #ifndef MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_DEBUG
mayur098 0:8f8e8f3cbd1c 32 #define MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_DEBUG false
mayur098 0:8f8e8f3cbd1c 33 #endif
mayur098 0:8f8e8f3cbd1c 34
mayur098 0:8f8e8f3cbd1c 35 #ifndef MBED_CFG_ESP8266_TX
mayur098 0:8f8e8f3cbd1c 36 #define MBED_CFG_ESP8266_TX D1
mayur098 0:8f8e8f3cbd1c 37 #endif
mayur098 0:8f8e8f3cbd1c 38
mayur098 0:8f8e8f3cbd1c 39 #ifndef MBED_CFG_ESP8266_RX
mayur098 0:8f8e8f3cbd1c 40 #define MBED_CFG_ESP8266_RX D0
mayur098 0:8f8e8f3cbd1c 41 #endif
mayur098 0:8f8e8f3cbd1c 42
mayur098 0:8f8e8f3cbd1c 43 #ifndef MBED_CFG_ESP8266_DEBUG
mayur098 0:8f8e8f3cbd1c 44 #define MBED_CFG_ESP8266_DEBUG false
mayur098 0:8f8e8f3cbd1c 45 #endif
mayur098 0:8f8e8f3cbd1c 46
mayur098 0:8f8e8f3cbd1c 47 #define STRINGIZE(x) STRINGIZE2(x)
mayur098 0:8f8e8f3cbd1c 48 #define STRINGIZE2(x) #x
mayur098 0:8f8e8f3cbd1c 49
mayur098 0:8f8e8f3cbd1c 50
mayur098 0:8f8e8f3cbd1c 51 // Simple xorshift pseudorandom number generator
mayur098 0:8f8e8f3cbd1c 52 class RandSeq {
mayur098 0:8f8e8f3cbd1c 53 private:
mayur098 0:8f8e8f3cbd1c 54 uint32_t x;
mayur098 0:8f8e8f3cbd1c 55 uint32_t y;
mayur098 0:8f8e8f3cbd1c 56 static const int A = 15;
mayur098 0:8f8e8f3cbd1c 57 static const int B = 18;
mayur098 0:8f8e8f3cbd1c 58 static const int C = 11;
mayur098 0:8f8e8f3cbd1c 59
mayur098 0:8f8e8f3cbd1c 60 public:
mayur098 0:8f8e8f3cbd1c 61 RandSeq(uint32_t seed=MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_SEED)
mayur098 0:8f8e8f3cbd1c 62 : x(seed), y(seed) {}
mayur098 0:8f8e8f3cbd1c 63
mayur098 0:8f8e8f3cbd1c 64 uint32_t next(void) {
mayur098 0:8f8e8f3cbd1c 65 x ^= x << A;
mayur098 0:8f8e8f3cbd1c 66 x ^= x >> B;
mayur098 0:8f8e8f3cbd1c 67 x ^= y ^ (y >> C);
mayur098 0:8f8e8f3cbd1c 68 return x + y;
mayur098 0:8f8e8f3cbd1c 69 }
mayur098 0:8f8e8f3cbd1c 70
mayur098 0:8f8e8f3cbd1c 71 void skip(size_t size) {
mayur098 0:8f8e8f3cbd1c 72 for (size_t i = 0; i < size; i++) {
mayur098 0:8f8e8f3cbd1c 73 next();
mayur098 0:8f8e8f3cbd1c 74 }
mayur098 0:8f8e8f3cbd1c 75 }
mayur098 0:8f8e8f3cbd1c 76
mayur098 0:8f8e8f3cbd1c 77 void buffer(uint8_t *buffer, size_t size) {
mayur098 0:8f8e8f3cbd1c 78 RandSeq lookahead = *this;
mayur098 0:8f8e8f3cbd1c 79
mayur098 0:8f8e8f3cbd1c 80 for (size_t i = 0; i < size; i++) {
mayur098 0:8f8e8f3cbd1c 81 buffer[i] = lookahead.next() & 0xff;
mayur098 0:8f8e8f3cbd1c 82 }
mayur098 0:8f8e8f3cbd1c 83 }
mayur098 0:8f8e8f3cbd1c 84
mayur098 0:8f8e8f3cbd1c 85 int cmp(uint8_t *buffer, size_t size) {
mayur098 0:8f8e8f3cbd1c 86 RandSeq lookahead = *this;
mayur098 0:8f8e8f3cbd1c 87
mayur098 0:8f8e8f3cbd1c 88 for (size_t i = 0; i < size; i++) {
mayur098 0:8f8e8f3cbd1c 89 int diff = buffer[i] - (lookahead.next() & 0xff);
mayur098 0:8f8e8f3cbd1c 90 if (diff != 0) {
mayur098 0:8f8e8f3cbd1c 91 return diff;
mayur098 0:8f8e8f3cbd1c 92 }
mayur098 0:8f8e8f3cbd1c 93 }
mayur098 0:8f8e8f3cbd1c 94 return 0;
mayur098 0:8f8e8f3cbd1c 95 }
mayur098 0:8f8e8f3cbd1c 96 };
mayur098 0:8f8e8f3cbd1c 97
mayur098 0:8f8e8f3cbd1c 98 // Shared buffer for network transactions
mayur098 0:8f8e8f3cbd1c 99 uint8_t *buffer;
mayur098 0:8f8e8f3cbd1c 100 size_t buffer_size;
mayur098 0:8f8e8f3cbd1c 101
mayur098 0:8f8e8f3cbd1c 102 // Tries to get the biggest buffer possible on the device. Exponentially
mayur098 0:8f8e8f3cbd1c 103 // grows a buffer until heap runs out of space, and uses half to leave
mayur098 0:8f8e8f3cbd1c 104 // space for the rest of the program
mayur098 0:8f8e8f3cbd1c 105 void generate_buffer(uint8_t **buffer, size_t *size, size_t min, size_t max) {
mayur098 0:8f8e8f3cbd1c 106 size_t i = min;
mayur098 0:8f8e8f3cbd1c 107 while (i < max) {
mayur098 0:8f8e8f3cbd1c 108 void *b = malloc(i);
mayur098 0:8f8e8f3cbd1c 109 if (!b) {
mayur098 0:8f8e8f3cbd1c 110 i /= 4;
mayur098 0:8f8e8f3cbd1c 111 if (i < min) {
mayur098 0:8f8e8f3cbd1c 112 i = min;
mayur098 0:8f8e8f3cbd1c 113 }
mayur098 0:8f8e8f3cbd1c 114 break;
mayur098 0:8f8e8f3cbd1c 115 }
mayur098 0:8f8e8f3cbd1c 116 free(b);
mayur098 0:8f8e8f3cbd1c 117 i *= 2;
mayur098 0:8f8e8f3cbd1c 118 }
mayur098 0:8f8e8f3cbd1c 119
mayur098 0:8f8e8f3cbd1c 120 *buffer = (uint8_t *)malloc(i);
mayur098 0:8f8e8f3cbd1c 121 *size = i;
mayur098 0:8f8e8f3cbd1c 122 TEST_ASSERT(buffer);
mayur098 0:8f8e8f3cbd1c 123 }
mayur098 0:8f8e8f3cbd1c 124
mayur098 0:8f8e8f3cbd1c 125 void test_udp_packet_pressure() {
mayur098 0:8f8e8f3cbd1c 126 generate_buffer(&buffer, &buffer_size,
mayur098 0:8f8e8f3cbd1c 127 MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_MIN,
mayur098 0:8f8e8f3cbd1c 128 MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_MAX);
mayur098 0:8f8e8f3cbd1c 129 printf("MBED: Generated buffer %d\r\n", buffer_size);
mayur098 0:8f8e8f3cbd1c 130
mayur098 0:8f8e8f3cbd1c 131 ESP8266Interface net(MBED_CFG_ESP8266_TX, MBED_CFG_ESP8266_RX, MBED_CFG_ESP8266_DEBUG);
mayur098 0:8f8e8f3cbd1c 132 int err = net.connect(STRINGIZE(MBED_CFG_ESP8266_SSID), STRINGIZE(MBED_CFG_ESP8266_PASS));
mayur098 0:8f8e8f3cbd1c 133 TEST_ASSERT_EQUAL(0, err);
mayur098 0:8f8e8f3cbd1c 134
mayur098 0:8f8e8f3cbd1c 135 printf("MBED: UDPClient IP address is '%s'\n", net.get_ip_address());
mayur098 0:8f8e8f3cbd1c 136 printf("MBED: UDPClient waiting for server IP and port...\n");
mayur098 0:8f8e8f3cbd1c 137
mayur098 0:8f8e8f3cbd1c 138 greentea_send_kv("target_ip", net.get_ip_address());
mayur098 0:8f8e8f3cbd1c 139
mayur098 0:8f8e8f3cbd1c 140 char recv_key[] = "host_port";
mayur098 0:8f8e8f3cbd1c 141 char ipbuf[60] = {0};
mayur098 0:8f8e8f3cbd1c 142 char portbuf[16] = {0};
mayur098 0:8f8e8f3cbd1c 143 unsigned int port = 0;
mayur098 0:8f8e8f3cbd1c 144
mayur098 0:8f8e8f3cbd1c 145 greentea_send_kv("host_ip", " ");
mayur098 0:8f8e8f3cbd1c 146 greentea_parse_kv(recv_key, ipbuf, sizeof(recv_key), sizeof(ipbuf));
mayur098 0:8f8e8f3cbd1c 147
mayur098 0:8f8e8f3cbd1c 148 greentea_send_kv("host_port", " ");
mayur098 0:8f8e8f3cbd1c 149 greentea_parse_kv(recv_key, portbuf, sizeof(recv_key), sizeof(ipbuf));
mayur098 0:8f8e8f3cbd1c 150 sscanf(portbuf, "%u", &port);
mayur098 0:8f8e8f3cbd1c 151
mayur098 0:8f8e8f3cbd1c 152 printf("MBED: Server IP address received: %s:%d \n", ipbuf, port);
mayur098 0:8f8e8f3cbd1c 153
mayur098 0:8f8e8f3cbd1c 154 UDPSocket sock;
mayur098 0:8f8e8f3cbd1c 155 SocketAddress udp_addr(ipbuf, port);
mayur098 0:8f8e8f3cbd1c 156
mayur098 0:8f8e8f3cbd1c 157 Timer timer;
mayur098 0:8f8e8f3cbd1c 158 timer.start();
mayur098 0:8f8e8f3cbd1c 159
mayur098 0:8f8e8f3cbd1c 160 // Tests exponentially growing sequences
mayur098 0:8f8e8f3cbd1c 161 for (size_t size = MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_MIN;
mayur098 0:8f8e8f3cbd1c 162 size < MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_MAX;
mayur098 0:8f8e8f3cbd1c 163 size *= 2) {
mayur098 0:8f8e8f3cbd1c 164 err = sock.open(&net);
mayur098 0:8f8e8f3cbd1c 165 TEST_ASSERT_EQUAL(0, err);
mayur098 0:8f8e8f3cbd1c 166 printf("UDP: %s:%d streaming %d bytes\r\n", ipbuf, port, size);
mayur098 0:8f8e8f3cbd1c 167
mayur098 0:8f8e8f3cbd1c 168 sock.set_blocking(false);
mayur098 0:8f8e8f3cbd1c 169
mayur098 0:8f8e8f3cbd1c 170 // Loop to send/recv all data
mayur098 0:8f8e8f3cbd1c 171 RandSeq tx_seq;
mayur098 0:8f8e8f3cbd1c 172 RandSeq rx_seq;
mayur098 0:8f8e8f3cbd1c 173 size_t rx_count = 0;
mayur098 0:8f8e8f3cbd1c 174 size_t tx_count = 0;
mayur098 0:8f8e8f3cbd1c 175 int known_time = timer.read_ms();
mayur098 0:8f8e8f3cbd1c 176 size_t window = buffer_size;
mayur098 0:8f8e8f3cbd1c 177
mayur098 0:8f8e8f3cbd1c 178 while (tx_count < size || rx_count < size) {
mayur098 0:8f8e8f3cbd1c 179 // Send out packets
mayur098 0:8f8e8f3cbd1c 180 if (tx_count < size) {
mayur098 0:8f8e8f3cbd1c 181 size_t chunk_size = size - tx_count;
mayur098 0:8f8e8f3cbd1c 182 if (chunk_size > window) {
mayur098 0:8f8e8f3cbd1c 183 chunk_size = window;
mayur098 0:8f8e8f3cbd1c 184 }
mayur098 0:8f8e8f3cbd1c 185
mayur098 0:8f8e8f3cbd1c 186 tx_seq.buffer(buffer, chunk_size);
mayur098 0:8f8e8f3cbd1c 187 int td = sock.sendto(udp_addr, buffer, chunk_size);
mayur098 0:8f8e8f3cbd1c 188
mayur098 0:8f8e8f3cbd1c 189 if (td > 0) {
mayur098 0:8f8e8f3cbd1c 190 if (MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_DEBUG) {
mayur098 0:8f8e8f3cbd1c 191 printf("UDP: tx -> %d\r\n", td);
mayur098 0:8f8e8f3cbd1c 192 }
mayur098 0:8f8e8f3cbd1c 193 tx_seq.skip(td);
mayur098 0:8f8e8f3cbd1c 194 tx_count += td;
mayur098 0:8f8e8f3cbd1c 195 } else if (td != NSAPI_ERROR_WOULD_BLOCK) {
mayur098 0:8f8e8f3cbd1c 196 // We may fail to send because of buffering issues, revert to
mayur098 0:8f8e8f3cbd1c 197 // last good sequence and cut buffer in half
mayur098 0:8f8e8f3cbd1c 198 if (window > MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_MIN) {
mayur098 0:8f8e8f3cbd1c 199 window /= 2;
mayur098 0:8f8e8f3cbd1c 200 }
mayur098 0:8f8e8f3cbd1c 201
mayur098 0:8f8e8f3cbd1c 202 if (MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_DEBUG) {
mayur098 0:8f8e8f3cbd1c 203 printf("UDP: Not sent (%d), window = %d\r\n", td, window);
mayur098 0:8f8e8f3cbd1c 204 }
mayur098 0:8f8e8f3cbd1c 205 }
mayur098 0:8f8e8f3cbd1c 206 }
mayur098 0:8f8e8f3cbd1c 207
mayur098 0:8f8e8f3cbd1c 208 // Prioritize recieving over sending packets to avoid flooding
mayur098 0:8f8e8f3cbd1c 209 // the network while handling erronous packets
mayur098 0:8f8e8f3cbd1c 210 while (rx_count < size) {
mayur098 0:8f8e8f3cbd1c 211 int rd = sock.recvfrom(NULL, buffer, buffer_size);
mayur098 0:8f8e8f3cbd1c 212 TEST_ASSERT(rd > 0 || rd == NSAPI_ERROR_WOULD_BLOCK);
mayur098 0:8f8e8f3cbd1c 213
mayur098 0:8f8e8f3cbd1c 214 if (rd > 0) {
mayur098 0:8f8e8f3cbd1c 215 if (MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_DEBUG) {
mayur098 0:8f8e8f3cbd1c 216 printf("UDP: rx <- %d\r\n", rd);
mayur098 0:8f8e8f3cbd1c 217 }
mayur098 0:8f8e8f3cbd1c 218
mayur098 0:8f8e8f3cbd1c 219 if (rx_seq.cmp(buffer, rd) == 0) {
mayur098 0:8f8e8f3cbd1c 220 rx_seq.skip(rd);
mayur098 0:8f8e8f3cbd1c 221 rx_count += rd;
mayur098 0:8f8e8f3cbd1c 222 known_time = timer.read_ms();
mayur098 0:8f8e8f3cbd1c 223 if (window < MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_MAX) {
mayur098 0:8f8e8f3cbd1c 224 window += MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_MIN;
mayur098 0:8f8e8f3cbd1c 225 }
mayur098 0:8f8e8f3cbd1c 226 }
mayur098 0:8f8e8f3cbd1c 227 } else if (timer.read_ms() - known_time >
mayur098 0:8f8e8f3cbd1c 228 MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_TIMEOUT) {
mayur098 0:8f8e8f3cbd1c 229 // Dropped packet or out of order, revert to last good sequence
mayur098 0:8f8e8f3cbd1c 230 // and cut buffer in half
mayur098 0:8f8e8f3cbd1c 231 tx_seq = rx_seq;
mayur098 0:8f8e8f3cbd1c 232 tx_count = rx_count;
mayur098 0:8f8e8f3cbd1c 233 known_time = timer.read_ms();
mayur098 0:8f8e8f3cbd1c 234 if (window > MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_MIN) {
mayur098 0:8f8e8f3cbd1c 235 window /= 2;
mayur098 0:8f8e8f3cbd1c 236 }
mayur098 0:8f8e8f3cbd1c 237
mayur098 0:8f8e8f3cbd1c 238 if (MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_DEBUG) {
mayur098 0:8f8e8f3cbd1c 239 printf("UDP: Dropped, window = %d\r\n", window);
mayur098 0:8f8e8f3cbd1c 240 }
mayur098 0:8f8e8f3cbd1c 241 } else if (rd == NSAPI_ERROR_WOULD_BLOCK) {
mayur098 0:8f8e8f3cbd1c 242 break;
mayur098 0:8f8e8f3cbd1c 243 }
mayur098 0:8f8e8f3cbd1c 244 }
mayur098 0:8f8e8f3cbd1c 245 }
mayur098 0:8f8e8f3cbd1c 246
mayur098 0:8f8e8f3cbd1c 247 err = sock.close();
mayur098 0:8f8e8f3cbd1c 248 TEST_ASSERT_EQUAL(0, err);
mayur098 0:8f8e8f3cbd1c 249 }
mayur098 0:8f8e8f3cbd1c 250
mayur098 0:8f8e8f3cbd1c 251 timer.stop();
mayur098 0:8f8e8f3cbd1c 252 printf("MBED: Time taken: %fs\r\n", timer.read());
mayur098 0:8f8e8f3cbd1c 253 printf("MBED: Speed: %.3fkb/s\r\n",
mayur098 0:8f8e8f3cbd1c 254 8*(2*MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_MAX -
mayur098 0:8f8e8f3cbd1c 255 MBED_CFG_UDP_CLIENT_PACKET_PRESSURE_MIN) / (1000*timer.read()));
mayur098 0:8f8e8f3cbd1c 256
mayur098 0:8f8e8f3cbd1c 257 net.disconnect();
mayur098 0:8f8e8f3cbd1c 258 }
mayur098 0:8f8e8f3cbd1c 259
mayur098 0:8f8e8f3cbd1c 260
mayur098 0:8f8e8f3cbd1c 261 // Test setup
mayur098 0:8f8e8f3cbd1c 262 utest::v1::status_t test_setup(const size_t number_of_cases) {
mayur098 0:8f8e8f3cbd1c 263 GREENTEA_SETUP(120, "udp_echo");
mayur098 0:8f8e8f3cbd1c 264 return verbose_test_setup_handler(number_of_cases);
mayur098 0:8f8e8f3cbd1c 265 }
mayur098 0:8f8e8f3cbd1c 266
mayur098 0:8f8e8f3cbd1c 267 Case cases[] = {
mayur098 0:8f8e8f3cbd1c 268 Case("UDP packet pressure", test_udp_packet_pressure),
mayur098 0:8f8e8f3cbd1c 269 };
mayur098 0:8f8e8f3cbd1c 270
mayur098 0:8f8e8f3cbd1c 271 Specification specification(test_setup, cases);
mayur098 0:8f8e8f3cbd1c 272
mayur098 0:8f8e8f3cbd1c 273 int main() {
mayur098 0:8f8e8f3cbd1c 274 return !Harness::run(specification);
mayur098 0:8f8e8f3cbd1c 275 }
mayur098 0:8f8e8f3cbd1c 276