X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/tripe/blobdiff_plain/72917fe7c663aced54f7e1185b7b72ba59aea73c..1171524232347e4c8fbd47409577c5e988ebc6d6:/server/tun-linux.c

diff --git a/server/tun-linux.c b/server/tun-linux.c
index 42503548..33451746 100644
--- a/server/tun-linux.c
+++ b/server/tun-linux.c
@@ -1,13 +1,11 @@
 /* -*-c-*-
- *
- * $Id$
  *
  * Tunnel interface based on Linux TUN/TAP driver
  *
  * (c) 2003 Straylight/Edgeware
  */
 
-/*----- Licensing notice --------------------------------------------------* 
+/*----- Licensing notice --------------------------------------------------*
  *
  * This file is part of Trivial IP Encryption (TrIPE).
  *
@@ -15,12 +13,12 @@
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
- * 
+ *
  * TrIPE is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU General Public License
  * along with TrIPE; if not, write to the Free Software Foundation,
  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
@@ -46,7 +44,7 @@ struct tunnel {
   const tunnel_ops *ops;		/* Pointer to operations */
   sel_file f;				/* Selector for TUN/TAP device */
   struct peer *p;			/* Pointer to my peer */
-};  
+};
 
 /* --- @t_read@ --- *
  *
@@ -67,7 +65,8 @@ static void t_read(int fd, unsigned mode, void *v)
 
   n = read(fd, buf_i, sizeof(buf_i));
   if (n < 0) {
-    a_warn("TUN", "%s", p_ifname(t->p), "read-error", "?ERRNO", A_END);
+    a_warn("TUN", "%s", p_ifname(t->p), "linux",
+	   "read-error", "?ERRNO", A_END);
     return;
   }
   IF_TRACING(T_TUNNEL, {
@@ -93,6 +92,7 @@ static void t_init(void) { return; }
 /* --- @t_create@ --- *
  *
  * Arguments:	@peer *p@ = pointer to peer block
+ *		@int fd@ = file descriptor of tunnel device
  *		@char **ifn@ = where to put the interface name
  *
  * Returns:	A tunnel block if it worked, or null on failure.
@@ -100,37 +100,16 @@ static void t_init(void) { return; }
  * Use:		Initializes a new tunnel.
  */
 
-static tunnel *t_create(peer *p, char **ifn)
+static tunnel *t_create(peer *p, int fd, char **ifn)
 {
-  int fd;
-  int f;
-  struct ifreq iff;
   tunnel *t;
 
-  if ((fd = open("/dev/net/tun", O_RDWR)) < 0) {
-    a_warn("TUN", "-", "linux",
-	    "open-error", "/dev/net/tun", "?ERRNO",
-	    A_END);
-    return (0);
-  }
   fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
-  memset(&iff, 0, sizeof(iff));
-  iff.ifr_name[0] = 0;
-  iff.ifr_flags = IFF_TUN | IFF_NO_PI;
-  if ((f = ioctl(fd, TUNSETIFF, &iff)) < 0) {
-    a_warn("TUN", "-", "linux", "config-error", "?ERRNO", A_END);
-    close(fd);
-    return (0);
-  }
   t = CREATE(tunnel);
   t->ops = &tun_linux;
   t->p = p;
   sel_initfile(&sel, &t->f, fd, SEL_READ, t_read, t);
   sel_addfile(&t->f);
-  iff.ifr_name[IFNAMSIZ - 1] = 0;
-  *ifn = xstrdup(iff.ifr_name);
-  T( trace(T_TUNNEL, "tun-linux: attached interface %s to peer `%s'",
-	   *ifn, p_name(p)); )
   return (t);
 }
 
@@ -146,11 +125,13 @@ static tunnel *t_create(peer *p, char **ifn)
 
 static void t_inject(tunnel *t, buf *b)
 {
+  int hunoz;
+
   IF_TRACING(T_TUNNEL, {
     trace(T_TUNNEL, "tun-linux: inject decrypted packet");
     trace_block(T_PACKET, "tunnel: packet contents", BBASE(b), BLEN(b));
   })
-  write(t->f.fd, BBASE(b), BLEN(b));
+  hunoz = write(t->f.fd, BBASE(b), BLEN(b));
 }
 
 /* --- @t_destroy@ --- *
@@ -163,14 +144,11 @@ static void t_inject(tunnel *t, buf *b)
  */
 
 static void t_destroy(tunnel *t)
-{
-  sel_rmfile(&t->f);
-  close(t->f.fd);
-  DESTROY(t);
-}
+  { sel_rmfile(&t->f); close(t->f.fd); DESTROY(t); }
 
 const tunnel_ops tun_linux = {
   "linux",
+  TUNF_PRIVOPEN,
   t_init,
   t_create,
   0,