Rolf Meyer
/
ethsnif
A simple Ethernet sniffer. A demonstration how to use the Ethernet interface.
Diff: main.cpp
- Revision:
- 0:29e2df9de9f1
diff -r 000000000000 -r 29e2df9de9f1 main.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Fri Sep 04 12:24:03 2009 +0000 @@ -0,0 +1,61 @@ +#include "mbed.h" +#include "Ethernet.h" +#include "hexview.h" + +using namespace mbed; + +DigitalOut led4(LED4); + +Ethernet eth; + +/* +__packed struct eth { + unsigned char dst[6]; + unsigned char src[6]; + unsigned short type; +}; + +void show(char *buffer, int size) { + eth *e = (eth *)buffer; + printf("Destination: %02hx:%02hx:%02hx:%02hx:%02hx:%02hx\n", + e->dst[0], e->dst[1], e->dst[2], e->dst[3], e->dst[4], e->dst[5]); + printf("Source: %02hx:%02hx:%02hx:%02hx:%02hx:%02hx\n", + e->src[0], e->src[1], e->src[2], e->src[3], e->src[4], e->src[5]); + + printf("Type %hd\n", eth->type); + hexview(buffer, size); +} +*/ + +unsigned short htons(unsigned short n) { // Host short to network shor + return ((n & 0xff) << 8) | ((n & 0xff00) >> 8); // Byte swapping +} + +void show(char *buf, int size) { + printf("Destination: %02hx:%02hx:%02hx:%02hx:%02hx:%02hx\n", + buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]); + printf("Source: %02hx:%02hx:%02hx:%02hx:%02hx:%02hx\n", + buf[6], buf[7], buf[8], buf[9], buf[10], buf[11]); + + printf("Type %hd\n", htons((short)buf[12])); + + hexview(buf, size); +} + + +int main() { + char buffer[0x600]; + int size = 0; + + while(1) { + if((size = eth.receive()) != 0) { + eth.read(buffer, size); + show(buffer, size); + } + + led4 = 1; + wait(0.2); + led4 = 0; + wait(0.2); + } +}