This file is indexed.

/usr/include/gnunet/gnunet_fragmentation_lib.h is in gnunet-dev 0.10.1-4.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
/*
     This file is part of GNUnet
     (C) 2009, 2011 Christian Grothoff (and other contributing authors)

     GNUnet 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 3, or (at your
     option) any later version.

     GNUnet 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 GNUnet; see the file COPYING.  If not, write to the
     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
     Boston, MA 02111-1307, USA.
*/
/**
 * @file include/gnunet_fragmentation_lib.h
 * @brief library to help fragment messages
 * @author Christian Grothoff
 *
 * TODO: consider additional flow-control for sending from
 *       fragmentation based on continuations.
 */

#ifndef GNUNET_FRAGMENTATION_LIB_H
#define GNUNET_FRAGMENTATION_LIB_H

#include "gnunet_util_lib.h"
#include "gnunet_bandwidth_lib.h"
#include "gnunet_statistics_service.h"

#ifdef __cplusplus
extern "C"
{
#if 0                           /* keep Emacsens' auto-indent happy */
}
#endif
#endif


/**
 * Fragmentation context.
 */
struct GNUNET_FRAGMENT_Context;


/**
 * Function that is called with messages created by the fragmentation
 * module.  In the case of the 'proc' callback of the
 * GNUNET_FRAGMENT_context_create function, this function must
 * eventually call 'GNUNET_FRAGMENT_context_transmission_done'.
 *
 * @param cls closure
 * @param msg the message that was created
 */
typedef void (*GNUNET_FRAGMENT_MessageProcessor) (void *cls,
                                                  const struct
                                                  GNUNET_MessageHeader * msg);


/**
 * Create a fragmentation context for the given message.
 * Fragments the message into fragments of size "mtu" or
 * less.  Calls 'proc' on each un-acknowledged fragment,
 * using both the expected 'delay' between messages and
 * acknowledgements and the given 'tracker' to guide the
 * frequency of calls to 'proc'.
 *
 * @param stats statistics context
 * @param mtu the maximum message size for each fragment
 * @param tracker bandwidth tracker to use for flow control (can be NULL)
 * @param msg_delay initial delay to insert between fragment transmissions
 *              based on previous messages
 * @param ack_delay expected delay between fragment transmission
 *              and ACK based on previous messages
 * @param msg the message to fragment
 * @param proc function to call for each fragment to transmit
 * @param proc_cls closure for proc
 * @return the fragmentation context
 */
struct GNUNET_FRAGMENT_Context *
GNUNET_FRAGMENT_context_create (struct GNUNET_STATISTICS_Handle *stats,
                                uint16_t mtu,
                                struct GNUNET_BANDWIDTH_Tracker *tracker,
                                struct GNUNET_TIME_Relative msg_delay,
                                struct GNUNET_TIME_Relative ack_delay,
                                const struct GNUNET_MessageHeader *msg,
                                GNUNET_FRAGMENT_MessageProcessor proc,
                                void *proc_cls);


/**
 * Continuation to call from the 'proc' function after the fragment
 * has been transmitted (and hence the next fragment can now be
 * given to proc).
 *
 * @param fc fragmentation context
 */
void
GNUNET_FRAGMENT_context_transmission_done (struct GNUNET_FRAGMENT_Context *fc);


/**
 * Process an acknowledgement message we got from the other
 * side (to control re-transmits).
 *
 * @param fc fragmentation context
 * @param msg acknowledgement message we received
 * @return GNUNET_OK if this ack completes the work of the 'fc'
 *                   (all fragments have been received);
 *         GNUNET_NO if more messages are pending
 *         GNUNET_SYSERR if this ack is not valid for this fc
 */
int
GNUNET_FRAGMENT_process_ack (struct GNUNET_FRAGMENT_Context *fc,
                             const struct GNUNET_MessageHeader *msg);


/**
 * Destroy the given fragmentation context (stop calling 'proc', free
 * resources).
 *
 * @param fc fragmentation context
 * @param msg_delay where to store average delay between individual message transmissions the
 *         last message (OUT only)
 * @param ack_delay where to store average delay between transmission and ACK for the
 *         last message, set to FOREVER if the message was not fully transmitted (OUT only)
 */
void
GNUNET_FRAGMENT_context_destroy (struct GNUNET_FRAGMENT_Context *fc,
				 struct GNUNET_TIME_Relative *msg_delay,
				 struct GNUNET_TIME_Relative *ack_delay);


/**
 * Defragmentation context (one per connection).
 */
struct GNUNET_DEFRAGMENT_Context;


/**
 * Function that is called with acknowledgement messages created by
 * the fragmentation module.  Acknowledgements are cummulative,
 * so it is OK to only transmit the 'latest' ack message for the same
 * message ID.
 *
 * @param cls closure
 * @param id unique message ID (modulo collisions)
 * @param msg the message that was created
 */
typedef void (*GNUNET_DEFRAGMENT_AckProcessor) (void *cls, uint32_t id,
                                                const struct
                                                GNUNET_MessageHeader * msg);


/**
 * Create a defragmentation context.
 *
 * @param stats statistics context
 * @param mtu the maximum message size for each fragment
 * @param num_msgs how many fragmented messages
 *                 to we defragment at most at the same time?
 * @param cls closure for proc and ackp
 * @param proc function to call with defragmented messages
 * @param ackp function to call with acknowledgements (to send
 *             back to the other side)
 * @return the defragmentation context
 */
struct GNUNET_DEFRAGMENT_Context *
GNUNET_DEFRAGMENT_context_create (struct GNUNET_STATISTICS_Handle *stats,
                                  uint16_t mtu, unsigned int num_msgs,
                                  void *cls,
                                  GNUNET_FRAGMENT_MessageProcessor proc,
                                  GNUNET_DEFRAGMENT_AckProcessor ackp);


/**
 * Destroy the given defragmentation context.
 *
 * @param dc defragmentation context
 */
void
GNUNET_DEFRAGMENT_context_destroy (struct GNUNET_DEFRAGMENT_Context *dc);


/**
 * We have received a fragment.  Process it.
 *
 * @param dc the context
 * @param msg the message that was received
 * @return GNUNET_OK on success, GNUNET_NO if this was a duplicate, GNUNET_SYSERR on error
 */
int
GNUNET_DEFRAGMENT_process_fragment (struct GNUNET_DEFRAGMENT_Context *dc,
                                    const struct GNUNET_MessageHeader *msg);


#if 0                           /* keep Emacsens' auto-indent happy */
{
#endif
#ifdef __cplusplus
}
#endif

/* end of gnunet_fragmentation_lib.h */
#endif