Rolf Meyer
/
ethsnif
A simple Ethernet sniffer. A demonstration how to use the Ethernet interface.
main.cpp
- Committer:
- rolf
- Date:
- 2009-09-04
- Revision:
- 0:29e2df9de9f1
File content as of revision 0:29e2df9de9f1:
#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); } }