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Ported tun_device de-/initialization to FreeBSD

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This commit is contained in:
Tobias Brunner
2012-08-29 15:34:17 +02:00
parent 39e9af9666
commit db275b1477
1 changed files with 47 additions and 5 deletions
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src/libstrongswan/utils/tun_device.c
+47 -5
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@@ -25,16 +25,17 @@
#include <sys/socket.h>
#include <sys/stat.h>
#include <unistd.h>
#include <net/if.h>
#ifdef __APPLE__
#include <net/if.h>
#include <net/if_utun.h>
#include <netinet/in_var.h>
#include <sys/kern_control.h>
#else /* !__APPLE__ */
#include <linux/if.h>
#elif defined(__linux__)
#include <linux/if_tun.h>
#endif /* !__APPLE__ */
#else
#include <net/if_tun.h>
#endif
#include "tun_device.h"
@@ -193,6 +194,8 @@ METHOD(tun_device_t, set_mtu, bool,
if (ioctl(this->sock, SIOCSIFMTU, &ifr) < 0)
{
DBG1(DBG_LIB, "failed to set MTU on %s: %s", this->if_name,
strerror(errno));
return FALSE;
}
this->mtu = mtu;
@@ -286,6 +289,20 @@ METHOD(tun_device_t, destroy, void,
if (this->tunfd > 0)
{
close(this->tunfd);
#ifdef __FreeBSD__
/* tun(4) says the following: "These network interfaces persist until
* the if_tun.ko module is unloaded, or until removed with the
* ifconfig(8) command." So simply closing the FD is not enough. */
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, this->if_name, IFNAMSIZ);
if (ioctl(this->sock, SIOCIFDESTROY, &ifr) < 0)
{
DBG1(DBG_LIB, "failed to destroy %s: %s", this->if_name,
strerror(errno));
}
#endif /* __FreeBSD__ */
}
if (this->sock > 0)
{
@@ -347,7 +364,7 @@ static bool init_tun(private_tun_device_t *this, const char *name_tmpl)
}
return TRUE;
#else /* !__APPLE__ */
#elif defined(IFF_TUN)
struct ifreq ifr;
@@ -376,6 +393,31 @@ static bool init_tun(private_tun_device_t *this, const char *name_tmpl)
strncpy(this->if_name, ifr.ifr_name, IFNAMSIZ);
return TRUE;
#else /* !IFF_TUN */
/* this works on FreeBSD and might also work on Linux with older TUN
* driver versions (no IFF_TUN) */
char devname[IFNAMSIZ];
int i;
if (name_tmpl)
{
DBG1(DBG_LIB, "arbitrary naming of TUN devices is not supported");
}
for (i = 0; i < 256; i++)
{
snprintf(devname, IFNAMSIZ, "/dev/tun%d", i);
this->tunfd = open(devname, O_RDWR);
if (this->tunfd > 0)
{ /* for ioctl(2) calls only the interface name is used */
snprintf(this->if_name, IFNAMSIZ, "tun%d", i);
break;
}
DBG1(DBG_LIB, "failed to open %s: %s", this->if_name, strerror(errno));
}
return this->tunfd > 0;
#endif /* !__APPLE__ */
}