server/tun-*.c: Factor out the (very similar) TUN-like drivers.

[tripe] / server / tun-unet.c

diff --git a/server/tun-unet.c b/server/tun-unet.c
deleted file mode 100644 (file)
index f283d56..0000000
--- a/server/tun-unet.c
+++ /dev/null
@@ -1,159 +0,0 @@
-/* -*-c-*-
- *
- * Tunnel interface based on Linux Usernet
- *
- * (c) 2001 Straylight/Edgeware
- */
-
-/*----- Licensing notice --------------------------------------------------*
- *
- * This file is part of Trivial IP Encryption (TrIPE).
- *
- * TrIPE is free software; you can redistribute it and/or modify
- * 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.
- */
-
-/*----- Header files ------------------------------------------------------*/
-
-#define TUN_INTERNALS
-
-#include "tripe.h"
-
-#ifdef TUN_UNET
-#  include <sys/ioctl.h>
-#  include <linux/if.h>
-#  include <unet.h>
-#endif
-
-/*----- Main code ---------------------------------------------------------*/
-
-#ifdef TUN_UNET
-
-struct tunnel {
-  const tunnel_ops *ops;               /* Pointer to operations */
-  sel_file f;                          /* Selector for Usernet device */
-  struct peer *p;                      /* Pointer to my peer */
-};
-
-/* --- @t_read@ --- *
- *
- * Arguments:  @int fd@ = file descriptor to read
- *             @unsigned mode@ = what's happened
- *             @void *v@ = pointer to tunnel block
- *
- * Returns:    ---
- *
- * Use:                Reads data from the tunnel.
- */
-
-static void t_read(int fd, unsigned mode, void *v)
-{
-  tunnel *t = v;
-  ssize_t n;
-  buf b;
-
-  n = read(fd, buf_i, sizeof(buf_i));
-  if (n < 0) {
-    a_warn("TUN", "%s", p_ifname(t->p), "unet",
-          "read-error", "?ERRNO", A_END);
-    return;
-  }
-  IF_TRACING(T_TUNNEL, {
-    trace(T_TUNNEL, "tun-unet: packet arrived");
-    trace_block(T_PACKET, "tun-unet: packet contents", buf_i, n);
-  })
-  buf_init(&b, buf_i, n);
-  p_tun(t->p, &b);
-}
-
-/* --- @t_init@ --- *
- *
- * Arguments:  ---
- *
- * Returns:    ---
- *
- * Use:                Initializes the tunneling system.  Maybe this will require
- *             opening file descriptors or something.
- */
-
-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.
- *
- * Use:                Initializes a new tunnel.
- */
-
-static tunnel *t_create(peer *p, int fd, char **ifn)
-{
-  tunnel *t;
-
-  fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC);
-  t = CREATE(tunnel);
-  t->ops = &tun_unet;
-  t->p = p;
-  sel_initfile(&sel, &t->f, fd, SEL_READ, t_read, t);
-  sel_addfile(&t->f);
-  return (t);
-}
-
-/* --- @t_inject@ --- *
- *
- * Arguments:  @tunnel *t@ = pointer to tunnel block
- *             @buf *b@ = buffer to send
- *
- * Returns:    ---
- *
- * Use:                Injects a packet into the local network stack.
- */
-
-static void t_inject(tunnel *t, buf *b)
-{
-  IF_TRACING(T_TUNNEL, {
-    trace(T_TUNNEL, "tun-unet: inject decrypted packet");
-    trace_block(T_PACKET, "tun-unet: packet contents", BBASE(b), BLEN(b));
-  })
-  DISCARD(write(t->f.fd, BBASE(b), BLEN(b)));
-}
-
-/* --- @t_destroy@ --- *
- *
- * Arguments:  @tunnel *t@ = pointer to tunnel block
- *
- * Returns:    ---
- *
- * Use:                Destroys a tunnel.
- */
-
-static void t_destroy(tunnel *t)
-  { sel_rmfile(&t->f); close(t->f.fd); DESTROY(t); }
-
-const tunnel_ops tun_unet = {
-  "unet",
-  TUNF_PRIVOPEN,
-  t_init,
-  t_create,
-  0,
-  t_inject,
-  t_destroy
-};
-
-#endif
-
-/*----- That's all, folks -------------------------------------------------*/