tor-android/external/badvpn_dns/flow/PacketCopier.h

91 lines
2.8 KiB
C

/**
* @file PacketCopier.h
* @author Ambroz Bizjak <ambrop7@gmail.com>
*
* @section LICENSE
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* @section DESCRIPTION
*
* Object which copies packets.
*/
#ifndef BADVPN_FLOW_PACKETCOPIER_H
#define BADVPN_FLOW_PACKETCOPIER_H
#include <stdint.h>
#include <flow/PacketPassInterface.h>
#include <flow/PacketRecvInterface.h>
/**
* Object which copies packets.
* Input is via {@link PacketPassInterface}.
* Output is via {@link PacketRecvInterface}.
*/
typedef struct {
DebugObject d_obj;
PacketPassInterface input;
PacketRecvInterface output;
int in_len;
uint8_t *in;
int out_have;
uint8_t *out;
} PacketCopier;
/**
* Initializes the object.
*
* @param o the object
* @param mtu maximum packet size. Must be >=0.
* @param pg pending group
*/
void PacketCopier_Init (PacketCopier *o, int mtu, BPendingGroup *pg);
/**
* Frees the object.
*
* @param o the object
*/
void PacketCopier_Free (PacketCopier *o);
/**
* Returns the input interface.
* The MTU of the interface will as in {@link PacketCopier_Init}.
* The interface will support cancel functionality.
*
* @return input interface
*/
PacketPassInterface * PacketCopier_GetInput (PacketCopier *o);
/**
* Returns the output interface.
* The MTU of the interface will be as in {@link PacketCopier_Init}.
*
* @return output interface
*/
PacketRecvInterface * PacketCopier_GetOutput (PacketCopier *o);
#endif