mirror of
https://github.com/xcat2/xNBA.git
synced 2024-12-15 15:51:44 +00:00
114 lines
2.4 KiB
C
114 lines
2.4 KiB
C
/* Copyright 2002 Jeff Dike
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <pwd.h>
|
|
#include <net/if.h>
|
|
#include <sys/ioctl.h>
|
|
#include <linux/if_tun.h>
|
|
|
|
static void Usage(char *name)
|
|
{
|
|
fprintf(stderr, "Create: %s [-b] [-u owner] [-t device-name] "
|
|
"[-f tun-clone-device]\n", name);
|
|
fprintf(stderr, "Delete: %s -d device-name [-f tun-clone-device]\n\n",
|
|
name);
|
|
fprintf(stderr, "The default tun clone device is /dev/net/tun - some systems"
|
|
" use\n/dev/misc/net/tun instead\n\n");
|
|
fprintf(stderr, "-b will result in brief output (just the device name)\n");
|
|
exit(1);
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
struct ifreq ifr;
|
|
struct passwd *pw;
|
|
long owner = geteuid();
|
|
int tap_fd, opt, delete = 0, brief = 0;
|
|
char *tun = "", *file = "/dev/net/tun", *name = argv[0], *end;
|
|
|
|
while((opt = getopt(argc, argv, "bd:f:t:u:")) > 0){
|
|
switch(opt) {
|
|
case 'b':
|
|
brief = 1;
|
|
break;
|
|
case 'd':
|
|
delete = 1;
|
|
tun = optarg;
|
|
break;
|
|
case 'f':
|
|
file = optarg;
|
|
break;
|
|
case 'u':
|
|
pw = getpwnam(optarg);
|
|
if(pw != NULL){
|
|
owner = pw->pw_uid;
|
|
break;
|
|
}
|
|
owner = strtol(optarg, &end, 0);
|
|
if(*end != '\0'){
|
|
fprintf(stderr, "'%s' is neither a username nor a numeric uid.\n",
|
|
optarg);
|
|
Usage(name);
|
|
}
|
|
break;
|
|
case 't':
|
|
tun = optarg;
|
|
break;
|
|
case 'h':
|
|
default:
|
|
Usage(name);
|
|
}
|
|
}
|
|
|
|
argv += optind;
|
|
argc -= optind;
|
|
|
|
if(argc > 0)
|
|
Usage(name);
|
|
|
|
if((tap_fd = open(file, O_RDWR)) < 0){
|
|
fprintf(stderr, "Failed to open '%s' : ", file);
|
|
perror("");
|
|
exit(1);
|
|
}
|
|
|
|
memset(&ifr, 0, sizeof(ifr));
|
|
|
|
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
|
|
strncpy(ifr.ifr_name, tun, sizeof(ifr.ifr_name) - 1);
|
|
if(ioctl(tap_fd, TUNSETIFF, (void *) &ifr) < 0){
|
|
perror("TUNSETIFF");
|
|
exit(1);
|
|
}
|
|
|
|
if(delete){
|
|
if(ioctl(tap_fd, TUNSETPERSIST, 0) < 0){
|
|
perror("TUNSETPERSIST");
|
|
exit(1);
|
|
}
|
|
printf("Set '%s' nonpersistent\n", ifr.ifr_name);
|
|
}
|
|
else {
|
|
if(ioctl(tap_fd, TUNSETPERSIST, 1) < 0){
|
|
perror("TUNSETPERSIST");
|
|
exit(1);
|
|
}
|
|
if(ioctl(tap_fd, TUNSETOWNER, owner) < 0){
|
|
perror("TUNSETPERSIST");
|
|
exit(1);
|
|
}
|
|
if(brief)
|
|
printf("%s\n", ifr.ifr_name);
|
|
else printf("Set '%s' persistent and owned by uid %ld\n", ifr.ifr_name,
|
|
owner);
|
|
}
|
|
return(0);
|
|
}
|