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tun has setip and setmtu
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50
tun.c
50
tun.c
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@ -24,12 +24,14 @@
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <err.h>
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#include <arpa/inet.h>
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#include "tun.h"
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#define TUN_MAX_TRY 50
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char *tun_device = NULL;
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char *if_device = NULL;
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#ifdef LINUX
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@ -61,6 +63,7 @@ open_tun()
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if (ioctl(tun_fd, TUNSETIFF, (void *) &ifreq) != -1) {
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printf("Opened %s\n", ifreq.ifr_name);
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if_device = strdup(ifreq.ifr_name);
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return tun_fd;
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}
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@ -95,6 +98,7 @@ open_tun()
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if ((tun_fd = open(tun_name, O_RDWR)) >= 0) {
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printf("Opened %s\n", tun_name);
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if_device = strdup(tun_name);
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return tun_fd;
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}
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@ -146,3 +150,49 @@ read_tun(int tun_fd, char *buf, int len)
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return read(tun_fd, buf, len);
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}
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int
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tun_setip(const char *ip)
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{
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char cmdline[512];
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if (inet_addr(ip) != 0) {
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snprintf(cmdline, sizeof(cmdline),
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"/sbin/ifconfig %s %s netmask 255.255.255.0",
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tun_device,
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ip);
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#ifndef LINUX
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int r;
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r = system(cmdline);
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if(r != 0) {
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return r;
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} else {
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snprintf(cmdline, sizeof(cmdline),
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"/sbin/route add %s/24 %s",
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ip, ip);
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}
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#endif
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return system(cmdline);
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}
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return 1;
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}
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int
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tun_setmtu(const int mtu)
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{
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char cmdline[512];
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if (mtu > 200 && mtu < 1500) {
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snprintf(cmdline, sizeof(cmdline),
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"/sbin/ifconfig %s mtu %d",
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tun_device,
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mtu);
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return system(cmdline);
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}
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return 1;
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}
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