Simple mbed OS sockets example for mbed OS5 & W5500 SPI Ethernet controller. This is a quick example of a simple HTTP client program using the network-socket API that is provided as a part of mbed-os. The program brings up an underlying network interface, and uses it to perform an HTTP transaction over a TCPSocket.
Dependencies: W5500Interface easy-connect
Fork of mbed-os-example-mbed5-sockets by
Result
- Serial Terminal Log
main.cpp@48:f2739ac5cb01, 2018-06-18 (annotated)
- Committer:
- mbed_official
- Date:
- Mon Jun 18 09:15:03 2018 +0100
- Revision:
- 48:f2739ac5cb01
- Parent:
- 47:08787ef063cb
- Child:
- 49:1923a727df5b
Merge remote-tracking branch 'origin/mbed-os-5.9.0-oob'
* origin/mbed-os-5.9.0-oob:
Print Mbed OS version
Updating mbed-os to mbed-os-5.9.0-rc3
Updating mbed-os to mbed-os-5.9.0-rc2
Use Ethernet by default on all platforms.
Add Jenkinsfile
Use Ethernet by default on ODIN_W2
Updating mbed-os to mbed-os-5.9.0-rc1
.
Commit copied from https://github.com/ARMmbed/mbed-os-example-sockets
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 0:17bd84fc5087 | 1 | #include "mbed.h" |
mbed_official | 5:3e952c60d705 | 2 | #include "EthernetInterface.h" |
mbed_official | 0:17bd84fc5087 | 3 | |
mbed_official | 5:3e952c60d705 | 4 | // Network interface |
mbed_official | 5:3e952c60d705 | 5 | EthernetInterface net; |
mbed_official | 0:17bd84fc5087 | 6 | |
mbed_official | 0:17bd84fc5087 | 7 | // Socket demo |
mbed_official | 5:3e952c60d705 | 8 | int main() { |
mbed_official | 47:08787ef063cb | 9 | int remaining; |
mbed_official | 47:08787ef063cb | 10 | int rcount; |
mbed_official | 47:08787ef063cb | 11 | char *p; |
mbed_official | 47:08787ef063cb | 12 | char *buffer = new char[256]; |
mbed_official | 47:08787ef063cb | 13 | nsapi_size_or_error_t r; |
mbed_official | 47:08787ef063cb | 14 | |
mbed_official | 5:3e952c60d705 | 15 | // Bring up the ethernet interface |
mbed_official | 5:3e952c60d705 | 16 | printf("Ethernet socket example\n"); |
mbed_official | 48:f2739ac5cb01 | 17 | |
mbed_official | 48:f2739ac5cb01 | 18 | #ifdef MBED_MAJOR_VERSION |
mbed_official | 48:f2739ac5cb01 | 19 | printf("Mbed OS version %d.%d.%d\n\n", MBED_MAJOR_VERSION, MBED_MINOR_VERSION, MBED_PATCH_VERSION); |
mbed_official | 48:f2739ac5cb01 | 20 | #endif |
mbed_official | 48:f2739ac5cb01 | 21 | |
mbed_official | 47:08787ef063cb | 22 | r = net.connect(); |
mbed_official | 47:08787ef063cb | 23 | if (r != 0) { |
mbed_official | 47:08787ef063cb | 24 | printf("Error! net.connect() returned: %d\n", r); |
mbed_official | 47:08787ef063cb | 25 | } |
mbed_official | 0:17bd84fc5087 | 26 | |
mbed_official | 0:17bd84fc5087 | 27 | // Show the network address |
mbed_official | 5:3e952c60d705 | 28 | const char *ip = net.get_ip_address(); |
mbed_official | 13:ed9e4aa00044 | 29 | const char *netmask = net.get_netmask(); |
mbed_official | 13:ed9e4aa00044 | 30 | const char *gateway = net.get_gateway(); |
mbed_official | 13:ed9e4aa00044 | 31 | printf("IP address: %s\n", ip ? ip : "None"); |
mbed_official | 13:ed9e4aa00044 | 32 | printf("Netmask: %s\n", netmask ? netmask : "None"); |
mbed_official | 13:ed9e4aa00044 | 33 | printf("Gateway: %s\n", gateway ? gateway : "None"); |
mbed_official | 0:17bd84fc5087 | 34 | |
mbed_official | 0:17bd84fc5087 | 35 | // Open a socket on the network interface, and create a TCP connection to mbed.org |
mbed_official | 5:3e952c60d705 | 36 | TCPSocket socket; |
mbed_official | 47:08787ef063cb | 37 | r = socket.open(&net); |
mbed_official | 47:08787ef063cb | 38 | if (r != 0) { |
mbed_official | 47:08787ef063cb | 39 | printf("Error! socket.open() returned: %d\n", r); |
mbed_official | 47:08787ef063cb | 40 | } |
mbed_official | 0:17bd84fc5087 | 41 | |
mbed_official | 47:08787ef063cb | 42 | r = socket.connect("api.ipify.org", 80); |
mbed_official | 47:08787ef063cb | 43 | if (r != 0) { |
mbed_official | 47:08787ef063cb | 44 | printf("Error! socket.connect() returned: %d\n", r); |
mbed_official | 47:08787ef063cb | 45 | } |
mbed_official | 47:08787ef063cb | 46 | |
mbed_official | 47:08787ef063cb | 47 | // Send a simple http request |
mbed_official | 47:08787ef063cb | 48 | char sbuffer[] = "GET / HTTP/1.1\r\nHost: api.ipify.org\r\nConnection: close\r\n\r\n"; |
mbed_official | 47:08787ef063cb | 49 | nsapi_size_t size = strlen(sbuffer); |
mbed_official | 0:17bd84fc5087 | 50 | |
mbed_official | 47:08787ef063cb | 51 | // Loop until whole request send |
mbed_official | 47:08787ef063cb | 52 | while(size) { |
mbed_official | 47:08787ef063cb | 53 | r = socket.send(sbuffer+r, size); |
mbed_official | 47:08787ef063cb | 54 | if (r < 0) { |
mbed_official | 47:08787ef063cb | 55 | printf("Error! socket.connect() returned: %d\n", r); |
mbed_official | 47:08787ef063cb | 56 | goto disconnect; |
mbed_official | 47:08787ef063cb | 57 | } |
mbed_official | 47:08787ef063cb | 58 | size -= r; |
mbed_official | 47:08787ef063cb | 59 | printf("sent %d [%.*s]\n", r, strstr(sbuffer, "\r\n")-sbuffer, sbuffer); |
mbed_official | 40:afef93b6d854 | 60 | } |
mbed_official | 47:08787ef063cb | 61 | |
mbed_official | 47:08787ef063cb | 62 | // Receieve an HTTP response and print out the response line |
mbed_official | 47:08787ef063cb | 63 | remaining = 256; |
mbed_official | 47:08787ef063cb | 64 | rcount = 0; |
mbed_official | 47:08787ef063cb | 65 | p = buffer; |
mbed_official | 47:08787ef063cb | 66 | while (0 < (r = socket.recv(p, remaining))) { |
mbed_official | 47:08787ef063cb | 67 | p += r; |
mbed_official | 47:08787ef063cb | 68 | rcount += r; |
mbed_official | 47:08787ef063cb | 69 | remaining -= r; |
mbed_official | 47:08787ef063cb | 70 | } |
mbed_official | 47:08787ef063cb | 71 | if (r < 0) { |
mbed_official | 47:08787ef063cb | 72 | printf("Error! socket.recv() returned: %d\n", r); |
mbed_official | 47:08787ef063cb | 73 | goto disconnect; |
mbed_official | 47:08787ef063cb | 74 | } |
mbed_official | 47:08787ef063cb | 75 | |
mbed_official | 13:ed9e4aa00044 | 76 | printf("recv %d [%.*s]\n", rcount, strstr(buffer, "\r\n")-buffer, buffer); |
mbed_official | 13:ed9e4aa00044 | 77 | |
mbed_official | 13:ed9e4aa00044 | 78 | // The api.ipify.org service also gives us the device's external IP address |
mbed_official | 47:08787ef063cb | 79 | p = strstr(buffer, "\r\n\r\n")+4; |
mbed_official | 47:08787ef063cb | 80 | printf("External IP address: %.*s\n", rcount-(p-buffer), p); |
mbed_official | 47:08787ef063cb | 81 | delete[] buffer; |
mbed_official | 0:17bd84fc5087 | 82 | |
mbed_official | 47:08787ef063cb | 83 | disconnect: |
mbed_official | 0:17bd84fc5087 | 84 | // Close the socket to return its memory and bring down the network interface |
mbed_official | 0:17bd84fc5087 | 85 | socket.close(); |
mbed_official | 0:17bd84fc5087 | 86 | |
mbed_official | 5:3e952c60d705 | 87 | // Bring down the ethernet interface |
mbed_official | 5:3e952c60d705 | 88 | net.disconnect(); |
mbed_official | 0:17bd84fc5087 | 89 | printf("Done\n"); |
mbed_official | 0:17bd84fc5087 | 90 | } |