Imported Upstream version 2.3_rc1

1 files changed, 0 insertions, 304 deletions

diff --git a/mtu.h b/mtu.h
deleted file mode 100644
index d9fa020..0000000
--- a/mtu.h
+++ /dev/null
@@ -1,304 +0,0 @@
-/*
- *  OpenVPN -- An application to securely tunnel IP networks
- *             over a single TCP/UDP port, with support for SSL/TLS-based
- *             session authentication and key exchange,
- *             packet encryption, packet authentication, and
- *             packet compression.
- *
- *  Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program 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 this program (see the file COPYING included with this
- *  distribution); if not, write to the Free Software Foundation, Inc.,
- *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- */
-
-#ifndef MTU_H
-#define MTU_H
-
-#include "buffer.h"
-
-/*
- * 
- * Packet maninipulation routes such as encrypt, decrypt, compress, decompress
- * are passed a frame buffer that looks like this:
- *
- *    [extra_frame bytes] [mtu bytes] [extra_frame_bytes] [compression overflow bytes]
- *                         ^
- *                   Pointer passed to function points here so that routine
- *                   can make use of extra_frame bytes before pointer
- *                   to prepend headers, etc.
- *
- *    extra_frame bytes is large enough for all encryption related overhead.
- *
- *    mtu bytes will be the MTU size set in the ifconfig statement that configures
- *      the TUN or TAP device such as:
- *
- *      ifconfig $1 10.1.0.2 pointopoint 10.1.0.1 mtu 1450
- *
- *    Compression overflow bytes is the worst-case size expansion that would be
- *    expected if we tried to compress mtu + extra_frame bytes of uncompressible data.
- */
-
-/*
- * Standard ethernet MTU
- */
-#define ETHERNET_MTU       1500
-
-/*
- * It is a fatal error if mtu is less than
- * this value for tun device.
- */
-#define TUN_MTU_MIN        100
-
-/*
- * Default MTU of network over which tunnel data will pass by TCP/UDP.
- */
-#define LINK_MTU_DEFAULT   1500
-
-/*
- * Default MTU of tunnel device.
- */
-#define TUN_MTU_DEFAULT    1500
-
-/*
- * MTU Defaults for TAP devices
- */
-#define TAP_MTU_EXTRA_DEFAULT  32
-
-/*
- * Default MSSFIX value, used for reducing TCP MTU size
- */
-#define MSSFIX_DEFAULT     1450
-
-/*
- * Alignment of payload data such as IP packet or
- * ethernet frame.
- */
-#define PAYLOAD_ALIGN 4
-
-struct frame {
-  /*
-   * Maximum datagram size to be sent over the tunnel TCP/UDP channel.
-   */
-  int link_mtu;
-  int link_mtu_dynamic;
-
-  /*
-   * How many extra bytes might each subsystem (crypto, TLS, or, compression)
-   * add to frame in worst case?
-   *
-   * mtu + extra_frame = MTU of TCP/UDP transport
-   */
-  int extra_frame;
-
-  /*
-   * Worst case size added to internal buffer due to functions
-   * such as compression which can potentially expand the size of uncompressible
-   * data.
-   */
-  int extra_buffer;
-
-  /*
-   * Max number of bytes in excess of tun mtu size that we might read
-   * or write from TUN/TAP device.
-   */
-  int extra_tun;
-
-  /*
-   * Max number of bytes in excess of link mtu size that we might read
-   * or write from UDP/TCP link.
-   */
-  int extra_link;
-
-  /*
-   * Alignment control
-   */
-# define FRAME_HEADROOM_MARKER_DECRYPT     (1<<0)
-# define FRAME_HEADROOM_MARKER_FRAGMENT    (1<<1)
-# define FRAME_HEADROOM_MARKER_READ_LINK   (1<<2)
-# define FRAME_HEADROOM_MARKER_READ_STREAM (1<<3)
-  unsigned int align_flags;
-  int align_adjust;
-};
-
-/* Routines which read struct frame should use the macros below */
-
-/*
- * Overhead added to packet payload due to encapsulation
- */
-#define EXTRA_FRAME(f)           ((f)->extra_frame)
-
-/*
- * Delta between tun payload size and final TCP/UDP datagram size
- * (not including extra_link additions)
- */
-#define TUN_LINK_DELTA(f)        ((f)->extra_frame + (f)->extra_tun)
-
-/*
- * This is the size to "ifconfig" the tun or tap device.
- */
-#define TUN_MTU_SIZE(f)          ((f)->link_mtu - TUN_LINK_DELTA(f))
-#define TUN_MTU_SIZE_DYNAMIC(f)  ((f)->link_mtu_dynamic - TUN_LINK_DELTA(f))
-
-/*
- * This is the maximum packet size that we need to be able to
- * read from or write to a tun or tap device.  For example,
- * a tap device ifconfiged to an MTU of 1200 might actually want
- * to return a packet size of 1214 on a read().
- */
-#define PAYLOAD_SIZE(f)          ((f)->link_mtu - (f)->extra_frame)
-#define PAYLOAD_SIZE_DYNAMIC(f)  ((f)->link_mtu_dynamic - (f)->extra_frame)
-
-/*
- * Max size of a payload packet after encryption, compression, etc.
- * overhead is added.
- */
-#define EXPANDED_SIZE(f)         ((f)->link_mtu)
-#define EXPANDED_SIZE_DYNAMIC(f) ((f)->link_mtu_dynamic)
-#define EXPANDED_SIZE_MIN(f)     (TUN_MTU_MIN + TUN_LINK_DELTA(f))
-
-/*
- * These values are used as maximum size constraints
- * on read() or write() from TUN/TAP device or TCP/UDP port.
- */
-#define MAX_RW_SIZE_TUN(f)       (PAYLOAD_SIZE(f))
-#define MAX_RW_SIZE_LINK(f)      (EXPANDED_SIZE(f) + (f)->extra_link)
-
-/*
- * Control buffer headroom allocations to allow for efficient prepending.
- */
-#define FRAME_HEADROOM_BASE(f)     (TUN_LINK_DELTA(f) + (f)->extra_buffer + (f)->extra_link)
-#define FRAME_HEADROOM(f)          frame_headroom(f, 0)
-#define FRAME_HEADROOM_ADJ(f, fm)  frame_headroom(f, fm)
-
-/*
- * Max size of a buffer used to build a packet for output to
- * the TCP/UDP port.
- */
-#define BUF_SIZE(f)              (TUN_MTU_SIZE(f) + FRAME_HEADROOM_BASE(f) * 2)
-
-/*
- * Function prototypes.
- */
-
-void frame_finalize (struct frame *frame,
-		     bool link_mtu_defined,
-		     int link_mtu,
-		     bool tun_mtu_defined,
-		     int tun_mtu);
-
-void frame_subtract_extra (struct frame *frame, const struct frame *src);
-
-void frame_print (const struct frame *frame,
-		  int level,
-		  const char *prefix);
-
-void set_mtu_discover_type (int sd, int mtu_type);
-int translate_mtu_discover_type_name (const char *name);
-
-/*
- * frame_set_mtu_dynamic and flags
- */
-
-#define SET_MTU_TUN         (1<<0) /* use tun/tap rather than link sizing */
-#define SET_MTU_UPPER_BOUND (1<<1) /* only decrease dynamic MTU */
-
-void frame_set_mtu_dynamic (struct frame *frame, int mtu, unsigned int flags);
-
-/*
- * allocate a buffer for socket or tun layer
- */
-void alloc_buf_sock_tun (struct buffer *buf,
-			 const struct frame *frame,
-			 const bool tuntap_buffer,
-			 const unsigned int align_mask);
-
-/*
- * EXTENDED_SOCKET_ERROR_CAPABILITY functions -- print extra error info
- * on socket errors, such as PMTU size.  As of 2003.05.11, only works
- * on Linux 2.4+.
- */
-
-#if EXTENDED_SOCKET_ERROR_CAPABILITY
-
-void set_sock_extended_error_passing (int sd);
-const char *format_extended_socket_error (int fd, int *mtu, struct gc_arena *gc);
-
-#endif
-
-/*
- * Calculate a starting offset into a buffer object, dealing with
- * headroom and alignment issues.
- */
-static inline int
-frame_headroom (const struct frame *f, const unsigned int flag_mask)
-{
-  const int offset = FRAME_HEADROOM_BASE (f);
-  const int adjust = (flag_mask & f->align_flags) ? f->align_adjust : 0;
-  const int delta = ((PAYLOAD_ALIGN << 24) - (offset + adjust)) & (PAYLOAD_ALIGN - 1);
-  return offset + delta;
-}
-
-/*
- * frame member adjustment functions
- */
-
-static inline void
-frame_add_to_extra_frame (struct frame *frame, const int increment)
-{
-  frame->extra_frame += increment;
-}
-
-static inline void
-frame_add_to_extra_tun (struct frame *frame, const int increment)
-{
-  frame->extra_tun += increment;
-}
-
-static inline void
-frame_add_to_extra_link (struct frame *frame, const int increment)
-{
-  frame->extra_link += increment;
-}
-
-static inline void
-frame_add_to_extra_buffer (struct frame *frame, const int increment)
-{
-  frame->extra_buffer += increment;
-}
-
-static inline void
-frame_add_to_align_adjust (struct frame *frame, const int increment)
-{
-  frame->align_adjust += increment;
-}
-
-static inline void
-frame_align_to_extra_frame (struct frame *frame)
-{
-  frame->align_adjust = frame->extra_frame + frame->extra_link;
-}
-
-static inline void
-frame_or_align_flags (struct frame *frame, const unsigned int flag_mask)
-{
-  frame->align_flags |= flag_mask;
-}
-
-static inline bool
-frame_defined (const struct frame *frame)
-{
-  return frame->link_mtu > 0;
-}
-
-#endif