X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/tripe/blobdiff_plain/72917fe7c663aced54f7e1185b7b72ba59aea73c..e9fac70c8cff251871c8177e7578f8ed055b7fc7:/server/tun-bsd.c

diff --git a/server/tun-bsd.c b/server/tun-bsd.c
index cf6c6d02..2c872997 100644
--- a/server/tun-bsd.c
+++ b/server/tun-bsd.c
@@ -1,13 +1,11 @@
 /* -*-c-*-
- *
- * $Id$
  *
  * Tunnel interface for 4.4BSD-derived systems
  *
  * (c) 2001 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.
@@ -40,8 +38,7 @@ struct tunnel {
   const tunnel_ops *ops;		/* Pointer to operations */
   sel_file f;				/* Selector for tunnel device */
   struct peer *p;			/* Pointer to my peer */
-  unsigned n;				/* Number of my tunnel device */
-};  
+};
 
 /* --- @t_read@ --- *
  *
@@ -62,7 +59,8 @@ 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), "bsd",
+	   "read-error", "?ERRNO", A_END);
     return;
   }
   IF_TRACING(T_TUNNEL, {
@@ -88,6 +86,7 @@ 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.
@@ -95,42 +94,16 @@ 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;
-  unsigned n;
   tunnel *t;
-  char buf[16];
-
-  n = 0;
-  for (;;) {
-    sprintf(buf, "/dev/tun%u", n);
-    if ((fd = open(buf, O_RDWR)) >= 0)
-      break;
-    switch (errno) {
-      case EBUSY:
-	T( trace(T_TUNNEL, "tunnel device %u busy: skipping", n); )
-	break;
-      case ENOENT:
-	a_warn("TUN", "-", "bsd", "no-tunnel-devices", A_END);
-	return (0);
-      default:
-	a_warn("TUN", "-", "open-error", "%s", buf, "?ERRNO", A_END);
-	break;
-    }
-    n++;
-  }
 
+  fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
   t = CREATE(tunnel);
   t->ops = &tun_bsd;
-  fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
   t->p = p;
-  t->n = n;
   sel_initfile(&sel, &t->f, fd, SEL_READ, t_read, t);
   sel_addfile(&t->f);
-  *ifn = xstrdup(buf + 5);
-  T( trace(T_TUNNEL, "tun-bsd: attached interface %s to peer `%s'",
-	   *ifn, p_name(p)); )
   return (t);
 }
 
@@ -150,7 +123,7 @@ static void t_inject(tunnel *t, buf *b)
     trace(T_TUNNEL, "tun-bsd: inject decrypted packet");
     trace_block(T_PACKET, "tun-bsd: packet contents", BBASE(b), BLEN(b));
   })
-  write(t->f.fd, BBASE(b), BLEN(b));
+  IGNORE(write(t->f.fd, BBASE(b), BLEN(b)));
 }
 
 /* --- @t_destroy@ --- *
@@ -163,14 +136,11 @@ 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_bsd = {
   "bsd",
+  TUNF_PRIVOPEN,
   t_init,
   t_create,
   0,