Hi Tuan Hoang
Use the ioctl() swiss-army knife with the SIOCGIFADDR command for that
one. You will need to pass a structure of type struct ifreq to this. You
can call ioctl() on any network socket. Basically it's:
#include <sys/ioctl.h>
#include <net/if.h>
#include <linux/sockios.h> /* This is a rush, try to find a more standard file */
struct ifreq ifr;
int socket;
int iresult;
char ip_address[20];
.
.
.
strcpy(ifr.ifr_name, "eth0"); /* assuming it's eth0 you want */
/*
* Open socket. Any network-related socket will do
*/
socket = socket(PF_INET, SOCK_RAW, 0); /* I use (PF_INET, SOCK_PACKET) */
/* on 2.0, (PF_PACKET, SOCK_RAW) */
/* on 2.2. Personal preference */
iresult = ioctl(socket, SIOCGIFADDR, &ifr);
/*
* At this point, the address should be in numeric format in
* ifr.ifr_addr. It's of type struct sockaddr.
*/
----------------------------------------------------------------
Gerard Paul R. Java
System Administrator, Mosaic Communications Cebu
primary: [EMAIL PROTECTED]
secondary: [EMAIL PROTECTED]
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