Cannot get interface flags: Invalid argument
hello,
I can not interface flag. Actually getting invalid argument. Can any one give me feedback. See my flag function....
Code:
/************************************************************************
Function: initdevice
Description: Set up the network device so we can read it.
**************************************************************************/
initdevice(fd_flags, dflags)
int fd_flags;
u_long dflags;
{
struct ifreq ifr;
int fd, flags = 0;
if((fd = socket(PF_INET, SOCK_PACKET, htons(0x0003))) < 0)
{
perror("Cannot open device socket");
exit(-1);
}
/* Get the existing interface flags */
strcpy(ifr.ifr_name, Gdevice);
if(ioctl(fd, SIOCGIFFLAGS, &ifr) < 0)
{
perror("Cannot get interface flags");
exit(-1);
}
ifr.ifr_flags |= IFF_PROMISC;
if(ioctl(fd, SIOCSIFFLAGS, &ifr) < 0)
{
perror("Cannot set interface flags");
exit(-1);
}
return(fd);
}
