diff options
| -rw-r--r-- | src/openvpn/tun.c | 22 | ||||
| -rw-r--r-- | src/openvpn/tun.h | 4 |
2 files changed, 20 insertions, 6 deletions
diff --git a/src/openvpn/tun.c b/src/openvpn/tun.c index 6218b73..3d60857 100644 --- a/src/openvpn/tun.c +++ b/src/openvpn/tun.c @@ -890,7 +890,7 @@ do_ifconfig (struct tuntap *tt, #elif defined(TARGET_OPENBSD) /* - * On OpenBSD, tun interfaces are persistant if created with + * On OpenBSD, tun interfaces are persistent if created with * "ifconfig tunX create", and auto-destroyed if created by * opening "/dev/tunX" (so we just use the /dev/tunX) */ @@ -1235,7 +1235,7 @@ do_ifconfig (struct tuntap *tt, gc_free (&gc); } -void +static void clear_tuntap (struct tuntap *tuntap) { CLEAR (*tuntap); @@ -1344,6 +1344,13 @@ open_tun_generic (const char *dev, const char *dev_type, const char *dev_node, if (!dynamic_opened) { + /* has named device existed before? if so, don't destroy at end */ + if ( if_nametoindex( dev ) > 0 ) + { + msg (M_INFO, "TUN/TAP device %s exists previously, keep at program end", dev ); + tt->persistent_if = true; + } + if ((tt->fd = open (tunname, O_RDWR)) < 0) msg (M_ERR, "Cannot open TUN/TAP dev %s", tunname); } @@ -2030,7 +2037,7 @@ close_tun (struct tuntap* tt) { /* only *TAP* devices need destroying, tun devices auto-self-destruct */ - if (tt && tt->type == DEV_TYPE_TUN ) + if (tt && (tt->type == DEV_TYPE_TUN || tt->persistent_if ) ) { close_tun_generic (tt); free(tt); @@ -2165,7 +2172,7 @@ close_tun (struct tuntap *tt) { /* only tun devices need destroying, tap devices auto-self-destruct */ - if (tt && tt->type != DEV_TYPE_TUN ) + if (tt && ( tt->type != DEV_TYPE_TUN || tt->persistent_if ) ) { close_tun_generic (tt); free(tt); @@ -2303,7 +2310,12 @@ open_tun (const char *dev, const char *dev_type, const char *dev_node, struct tu void close_tun (struct tuntap *tt) { - if (tt) + if (tt && tt->persistent_if ) /* keep pre-existing if around */ + { + close_tun_generic (tt); + free (tt); + } + else if (tt) /* close and destroy */ { struct gc_arena gc = gc_new (); struct argv argv; diff --git a/src/openvpn/tun.h b/src/openvpn/tun.h index 9bd990f..8622bf8 100644 --- a/src/openvpn/tun.h +++ b/src/openvpn/tun.h @@ -137,6 +137,8 @@ struct tuntap bool ipv6; + bool persistent_if; /* if existed before, keep on program end */ + struct tuntap_options options; /* options set on command line */ char *actual_name; /* actual name of TUN/TAP dev, usually including unit number */ @@ -201,7 +203,7 @@ tuntap_defined (const struct tuntap *tt) * Function prototypes */ -void clear_tuntap (struct tuntap *tuntap); +static void clear_tuntap (struct tuntap *tuntap); void open_tun (const char *dev, const char *dev_type, const char *dev_node, struct tuntap *tt); |