"ifconfig [dev_name] up"
int interface_up(char * interface_name)
{
int s;
if((s = socket(PF_INET,SOCK_STREAM,0)) < 0)
{
perror("Socket");
return -1;
}
struct ifreq ifr;
strcpy(ifr.ifr_name,interface_name);
short flag;
flag = IFF_UP;
if(ioctl(s,SIOCGIFFLAGS,&ifr) < 0)
{
perror("ioctl");
return -1;
}
ifr.ifr_ifru.ifru_flags |= flag;
if(ioctl(s,SIOCSIFFLAGS,&ifr) < 0)
{
perror("ioctl");
return -1;
}
return 0;
}
int interface_up(char * interface_name)
{
int s;
if((s = socket(PF_INET,SOCK_STREAM,0)) < 0)
{
perror("Socket");
return -1;
}
struct ifreq ifr;
strcpy(ifr.ifr_name,interface_name);
short flag;
flag = IFF_UP;
if(ioctl(s,SIOCGIFFLAGS,&ifr) < 0)
{
perror("ioctl");
return -1;
}
ifr.ifr_ifru.ifru_flags |= flag;
if(ioctl(s,SIOCSIFFLAGS,&ifr) < 0)
{
perror("ioctl");
return -1;
}
return 0;
}
