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| C code to find out network interfaces and mac address in Redhat Linux |
| Saturday, January 15, 2005 |
i needed mac address of network interface in linux for my program. Many people advised me to look into the code of ifconfig. But is is very vast i was finding spme small function that will do my work. Previously I was reading some files in /proc file system to get this id, but in Redhat linux 9.0 I was not able to find the interface file. So I searched the internet and here is the code
#include
#include
//#include
#include
#include
#include
#include
#include
#include
#include
#include
using namespace std;
int main()
{
struct ifreq ifr;
struct if_nameindex* if_name;
unsigned char* mac;
int sd;
int i = 0;
/* get socket descriptor */
sd = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
if(sd == -1)
{ cerr << "Socket Error" << endl; exit(1);}
/* get all network interface names */
if_name = if_nameindex();
while( (if_name[i].if_index != 0) && (if_name[i].if_name != NULL) )
{
/* write the name of the interface to the ifreq struct */
memcpy(&ifr.ifr_name, if_name[i].if_name, IFNAMSIZ);
/* get hardware address */
if (ioctl(sd, SIOCGIFHWADDR, &ifr) < 0)
{ cerr << "ioctl Error: SIOCGIFHWADDR" << endl; exit(1); }
mac = (unsigned char*) &ifr.ifr_hwaddr.sa_data;
/cout << if_name[i].if_name << endl;
/* display MAC */
printf("%02X:%02X:%02X:%02X:%02X:%02Xn", mac[0],mac[1],mac[2],mac[3],mac[4],mac[5]);
++i;
}
/* free memory allocated by if_nameindex() */
if_freenameindex(if_name);
return 0;
}
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posted by Sameer @ 4:50 AM   |
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| Gamil Notifier |
| Thursday, January 06, 2005 |
Cool Tool!!
It has buit in proxy authentication also, very helpful for people sitting behind firewall. It does the work of loggin in to mail account for you and if new mail arrives it shows it in small popup window. Double click its icon in task tray will open gmail inbox in browser.
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| posted by Sameer @ 9:00 AM |
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| Bluejacking |
| Tuesday, January 04, 2005 |
Bluejacking is coolest use bluetooth of your mobile phone.
Want to know more visit
http://www.bluejackq.com/whatisbluejacking.htm
But here in india we don't have so many mobile phone users with bluetooth :-(
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| posted by Sameer @ 10:20 PM |
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| First Post |
| Monday, January 03, 2005 |
Just thought why should not I start a blogging ?
And opened accont here..
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| posted by Sameer @ 1:06 PM |
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