NetworkSocketAPI / Mbed 2 deprecated HelloLWIPInterfaceNonBlocking

Non-blocking example of the LWIPInterface

Dependencies:   LWIPInterface NetworkSocketAPI mbed-rtos mbed

Non-blocking example for the NetworkSocketAPI. Attempts to get the device's public facing IP address from ifcfg.me using the Happy Eyeballs algorithm to fetch an IPv4 or IPv6 address.

main.cpp@70:6563866f9466, 2016-04-20 (annotated)

Committer:
Christopher Haster
Date:
Wed Apr 20 20:41:17 2016 -0500
Revision:
70:6563866f9466
Parent:
66:6a20c7e57306 
Updated dependencies

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sam_grove 0:1984a177ff56 1 /* NetworkSocketAPI Example Program
sam_grove 0:1984a177ff56 2 * Copyright (c) 2015 ARM Limited
sam_grove 0:1984a177ff56 3 *
sam_grove 0:1984a177ff56 4 * Licensed under the Apache License, Version 2.0 (the "License");
sam_grove 0:1984a177ff56 5 * you may not use this file except in compliance with the License.
sam_grove 0:1984a177ff56 6 * You may obtain a copy of the License at
sam_grove 0:1984a177ff56 7 *
sam_grove 0:1984a177ff56 8 * http://www.apache.org/licenses/LICENSE-2.0
sam_grove 0:1984a177ff56 9 *
sam_grove 0:1984a177ff56 10 * Unless required by applicable law or agreed to in writing, software
sam_grove 0:1984a177ff56 11 * distributed under the License is distributed on an "AS IS" BASIS,
sam_grove 0:1984a177ff56 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
sam_grove 0:1984a177ff56 13 * See the License for the specific language governing permissions and
sam_grove 0:1984a177ff56 14 * limitations under the License.
sam_grove 0:1984a177ff56 15 */
sam_grove 0:1984a177ff56 16
sam_grove 0:1984a177ff56 17 #include "mbed.h"
Christopher Haster 66:6a20c7e57306 18 #include "rtos.h"
geky 44:d7c5a56450a1 19 #include "LWIPInterface.h"
Christopher Haster 30:f80540b6e2db 20 #include "TCPSocket.h"
sam_grove 0:1984a177ff56 21
Christopher Haster 65:826ec2bbec51 22 LWIPInterface eth;
Christopher Haster 66:6a20c7e57306 23 Semaphore network_sem(1);
Christopher Haster 65:826ec2bbec51 24
Christopher Haster 66:6a20c7e57306 25 DigitalOut blink_led(LED_GREEN);
Christopher Haster 66:6a20c7e57306 26 DigitalOut network_led(LED_BLUE);
Christopher Haster 66:6a20c7e57306 27
Christopher Haster 65:826ec2bbec51 28 void blink()
sam_grove 50:a9926b8b21fe 29 {
Christopher Haster 66:6a20c7e57306 30 blink_led = !blink_led;
Christopher Haster 66:6a20c7e57306 31 }
Christopher Haster 66:6a20c7e57306 32
Christopher Haster 66:6a20c7e57306 33 void network_callback()
Christopher Haster 66:6a20c7e57306 34 {
Christopher Haster 66:6a20c7e57306 35 network_led = !network_led;
Christopher Haster 66:6a20c7e57306 36 network_sem.release();
sam_grove 50:a9926b8b21fe 37 }
Christopher Haster 58:7033f5893210 38
sam_grove 0:1984a177ff56 39 int main()
sam_grove 20:4cb9ef3b0cc9 40 {
Christopher Haster 65:826ec2bbec51 41 Ticker blinky;
Christopher Haster 65:826ec2bbec51 42 blinky.attach(blink, 0.4f);
Christopher Haster 65:826ec2bbec51 43
bridadan 14:c47437f5dae8 44 printf("NetworkSocketAPI Example\r\n");
Christopher Haster 58:7033f5893210 45
geky 44:d7c5a56450a1 46 eth.connect();
Christopher Haster 58:7033f5893210 47 const char *ip = eth.get_ip_address();
Christopher Haster 58:7033f5893210 48 const char *mac = eth.get_mac_address();
Christopher Haster 65:826ec2bbec51 49 printf("IP address is: %s\r\n", ip ? ip : "No IP");
Christopher Haster 65:826ec2bbec51 50 printf("MAC address is: %s\r\n", mac ? mac : "No MAC");
geky 59:14d6716bc772 51
Christopher Haster 65:826ec2bbec51 52 SocketAddress addr(&eth, "mbed.org");
Christopher Haster 65:826ec2bbec51 53 printf("mbed.org resolved to: %s\r\n", addr.get_ip_address());
sarahmarshy 22:1d355289fc18 54
Christopher Haster 66:6a20c7e57306 55 TCPSocket ipv4socket(&eth);
Christopher Haster 66:6a20c7e57306 56 ipv4socket.connect("4.ifcfg.me", 23);
Christopher Haster 66:6a20c7e57306 57 ipv4socket.set_blocking(false);
Christopher Haster 66:6a20c7e57306 58 ipv4socket.attach(network_callback);
Christopher Haster 66:6a20c7e57306 59
Christopher Haster 66:6a20c7e57306 60 TCPSocket ipv6socket(&eth);
Christopher Haster 66:6a20c7e57306 61 ipv6socket.connect("6.ifcfg.me", 23);
Christopher Haster 66:6a20c7e57306 62 ipv6socket.set_blocking(false);
Christopher Haster 66:6a20c7e57306 63 ipv6socket.attach(network_callback);
sarahmarshy 21:979b1db5d7da 64
Christopher Haster 66:6a20c7e57306 65 // Tries to get both an IPv4 and IPv6 address
Christopher Haster 66:6a20c7e57306 66 while (network_sem.wait(2500) > 0) {
Christopher Haster 66:6a20c7e57306 67 int count;
Christopher Haster 66:6a20c7e57306 68 char buffer[64];
Christopher Haster 66:6a20c7e57306 69
Christopher Haster 66:6a20c7e57306 70 count = ipv4socket.recv(buffer, sizeof buffer);
Christopher Haster 66:6a20c7e57306 71 if (count >= 0) {
Christopher Haster 66:6a20c7e57306 72 printf("public IPv4 address is: %.15s\r\n", &buffer[15]);
Christopher Haster 66:6a20c7e57306 73 }
Christopher Haster 66:6a20c7e57306 74
Christopher Haster 66:6a20c7e57306 75 count = ipv6socket.recv(buffer, sizeof buffer);
Christopher Haster 66:6a20c7e57306 76 if (count >= 0) {
Christopher Haster 66:6a20c7e57306 77 printf("public IPv6 address is: %.39s\r\n", &buffer[15]);
Christopher Haster 66:6a20c7e57306 78 }
Christopher Haster 66:6a20c7e57306 79 }
Christopher Haster 65:826ec2bbec51 80
Christopher Haster 66:6a20c7e57306 81 ipv4socket.close();
Christopher Haster 66:6a20c7e57306 82 ipv6socket.close();
geky 44:d7c5a56450a1 83 eth.disconnect();
Christopher Haster 30:f80540b6e2db 84
Christopher Haster 65:826ec2bbec51 85 printf("Done\r\n");
sam_grove 0:1984a177ff56 86 }