This file is indexed.

/usr/include/gnunet/gnunet_hello_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
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
/*
     This file is part of GNUnet.
     (C) 2001, 2002, 2003, 2004, 2005, 2006, 2010, 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_hello_lib.h
 * @brief helper library for handling HELLOs
 * @author Christian Grothoff
 */

#ifndef GNUNET_HELLO_LIB_H
#define GNUNET_HELLO_LIB_H

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

#include "gnunet_util_lib.h"


/**
 * Prefix that every HELLO URI must start with.
 */
#define GNUNET_HELLO_URI_PREFIX "gnunet://hello/"

/**
 * Prefix that every FRIEND HELLO URI must start with.
 */
#define GNUNET_FRIEND_HELLO_URI_PREFIX "gnunet://friend-hello/"


/**
 * Additional local information about an address
 *
 * These information are only valid for the local peer and are not serialized
 * when a #GNUNET_HELLO_Message is created
 */
enum GNUNET_HELLO_AddressInfo
{
  /**
   * No additional information
   */
  GNUNET_HELLO_ADDRESS_INFO_NONE = 0,

  /**
   * This is an inbound address and cannot be used to initiate an outbound
   * connection to another peer
   */
  GNUNET_HELLO_ADDRESS_INFO_INBOUND = 1
};


/**
 * An address for communicating with a peer.  We frequently
 * need this tuple and the components cannot really be
 * separated.  This is NOT the format that would be used
 * on the wire.
 */
struct GNUNET_HELLO_Address
{

  /**
   * For which peer is this an address?
   */
  struct GNUNET_PeerIdentity peer;

  /**
   * Name of the transport plugin enabling the communication using
   * this address.
   */
  const char *transport_name;

  /**
   * Binary representation of the address (plugin-specific).
   */
  const void *address;

  /**
   * Number of bytes in @e address.
   */
  size_t address_length;

  /**
   * Extended information about address
   *
   * This field contains additional #GNUNET_HELLO_AddressInfo flags e.g.
   * to indicate an address is inbound and cannot be used to initiate an
   * outbound connection.
   *
   * These information are only valid for the local peer and are not serialized
   * when a #GNUNET_HELLO_Message is created
   */
  enum GNUNET_HELLO_AddressInfo local_info;

};


/**
 * Allocate an address struct.
 *
 * @param peer the peer
 * @param transport_name plugin name
 * @param address binary address
 * @param address_length number of bytes in @a address
 * @param local_info additional local information for the address
 * @return the address struct
 */
struct GNUNET_HELLO_Address *
GNUNET_HELLO_address_allocate (const struct GNUNET_PeerIdentity *peer,
                               const char *transport_name,
                               const void *address,
                               size_t address_length,
                               enum GNUNET_HELLO_AddressInfo local_info);


/**
 * Copy an address struct.
 *
 * @param address address to copy
 * @return a copy of the address struct
 */
struct GNUNET_HELLO_Address *
GNUNET_HELLO_address_copy (const struct GNUNET_HELLO_Address *address);


/**
 * Compare two addresses.  Does NOT compare the peer identity,
 * that is assumed already to match!
 *
 * @param a1 first address
 * @param a2 second address
 * @return 0 if the addresses are equal, -1 if @a a1< @a a2, 1 if @a a1> @a a2.
 */
int
GNUNET_HELLO_address_cmp (const struct GNUNET_HELLO_Address *a1,
                          const struct GNUNET_HELLO_Address *a2);


/**
 * Get the size of an address struct.
 *
 * @param address address
 * @return the size
 */
size_t
GNUNET_HELLO_address_get_size (const struct GNUNET_HELLO_Address *address);


/**
 * Check if an address has a local option set
 *
 * @param address the address to check
 * @param option the respective option to check for
 * @return #GNUNET_YES or #GNUNET_NO
 */
int
GNUNET_HELLO_address_check_option (const struct GNUNET_HELLO_Address *address,
                                   enum GNUNET_HELLO_AddressInfo option);


/**
 * Free an address.
 *
 * @param addr address to free
 */
#define GNUNET_HELLO_address_free(addr) GNUNET_free(addr)


/**
 * A HELLO message is used to exchange information about
 * transports with other peers.  This struct is guaranteed
 * to start with a `struct GNUNET_MessageHeader`, everything else
 * should be internal to the HELLO library.
 */
struct GNUNET_HELLO_Message;


/**
 * Return HELLO type
 *
 * @param h HELLO Message to test
 * @return #GNUNET_YES or #GNUNET_NO
 */
int
GNUNET_HELLO_is_friend_only (const struct GNUNET_HELLO_Message *h);


/**
 * Copy the given address information into
 * the given buffer using the format of HELLOs.
 *
 * @param address address to add
 * @param expiration expiration for the address
 * @param target where to copy the address
 * @param max maximum number of bytes to copy to @a target
 * @return number of bytes copied, 0 if
 *         the target buffer was not big enough.
 */
size_t
GNUNET_HELLO_add_address (const struct GNUNET_HELLO_Address *address,
                          struct GNUNET_TIME_Absolute expiration,
                          char *target,
                          size_t max);


/**
 * Callback function used to fill a buffer of max bytes with a list of
 * addresses in the format used by HELLOs.  Should use
 * #GNUNET_HELLO_add_address() as a helper function.
 *
 * @param cls closure
 * @param max maximum number of bytes that can be written to @a buf
 * @param buf where to write the address information
 * @return number of bytes written, 0 to signal the
 *         end of the iteration.
 */
typedef size_t
(*GNUNET_HELLO_GenerateAddressListCallback) (void *cls,
                                             size_t max,
                                             void *buf);


/**
 * Construct a HELLO message given the public key,
 * expiration time and an iterator that spews the
 * transport addresses.
 *
 * If friend only is set to #GNUNET_YES we create a FRIEND_HELLO which
 * will not be gossiped to other peers.
 *
 * @param publicKey public key to include in the HELLO
 * @param addrgen callback to invoke to get addresses
 * @param addrgen_cls closure for @a addrgen
 * @param friend_only should the returned HELLO be only visible to friends?
 * @return the hello message
 */
struct GNUNET_HELLO_Message *
GNUNET_HELLO_create (const struct GNUNET_CRYPTO_EddsaPublicKey *publicKey,
                     GNUNET_HELLO_GenerateAddressListCallback addrgen,
                     void *addrgen_cls,
                     int friend_only);


/**
 * Return the size of the given HELLO message.
 * @param hello to inspect
 * @return the size, 0 if HELLO is invalid
 */
uint16_t
GNUNET_HELLO_size (const struct GNUNET_HELLO_Message *hello);


/**
 * Construct a HELLO message by merging the
 * addresses in two existing HELLOs (which
 * must be for the same peer).
 *
 * @param h1 first HELLO message
 * @param h2 the second HELLO message
 * @return the combined hello message
 */
struct GNUNET_HELLO_Message *
GNUNET_HELLO_merge (const struct GNUNET_HELLO_Message *h1,
                    const struct GNUNET_HELLO_Message *h2);


/**
 * Test if two HELLO messages contain the same addresses.
 * If they only differ in expiration time, the lowest
 * expiration time larger than 'now' where they differ
 * is returned.
 *
 * @param h1 first HELLO message
 * @param h2 the second HELLO message
 * @param now time to use for deciding which addresses have
 *            expired and should not be considered at all
 * @return absolute time forever if the two HELLOs are
 *         totally identical; smallest timestamp >= now if
 *         they only differ in timestamps;
 *         zero if the some addresses with expirations >= now
 *         do not match at all
 */
struct GNUNET_TIME_Absolute
GNUNET_HELLO_equals (const struct GNUNET_HELLO_Message *h1,
                     const struct GNUNET_HELLO_Message *h2,
                     struct GNUNET_TIME_Absolute now);


/**
 * Iterator callback to go over all addresses.
 *
 * @param cls closure
 * @param address the address
 * @param expiration expiration time
 * @return #GNUNET_OK to keep the address,
 *         #GNUNET_NO to delete it from the HELLO
 *         #GNUNET_SYSERR to stop iterating (but keep current address)
 */
typedef int
(*GNUNET_HELLO_AddressIterator) (void *cls,
                                 const struct GNUNET_HELLO_Address *address,
                                 struct GNUNET_TIME_Absolute expiration);


/**
 * When does the last address in the given HELLO expire?
 *
 * @param msg HELLO to inspect
 * @return time the last address expires, 0 if there are no addresses in the HELLO
 */
struct GNUNET_TIME_Absolute
GNUNET_HELLO_get_last_expiration (const struct GNUNET_HELLO_Message *msg);


/**
 * Iterate over all of the addresses in the HELLO.
 *
 * @param msg HELLO to iterate over; client does not need to
 *        have verified that msg is well-formed (beyond starting
 *        with a GNUNET_MessageHeader of the right type).
 * @param return_modified if a modified copy should be returned,
 *         otherwise NULL will be returned
 * @param it iterator to call on each address
 * @param it_cls closure for @a it
 * @return the modified HELLO or NULL
 */
struct GNUNET_HELLO_Message *
GNUNET_HELLO_iterate_addresses (const struct GNUNET_HELLO_Message *msg,
                                int return_modified,
                                GNUNET_HELLO_AddressIterator it, void *it_cls);


/**
 * Iterate over addresses in "new_hello" that
 * are NOT already present in "old_hello".
 *
 * @param new_hello a HELLO message
 * @param old_hello a HELLO message
 * @param expiration_limit ignore addresses in old_hello
 *        that expired before the given time stamp
 * @param it iterator to call on each address
 * @param it_cls closure for @a it
 */
void
GNUNET_HELLO_iterate_new_addresses (const struct GNUNET_HELLO_Message *new_hello,
                                    const struct GNUNET_HELLO_Message *old_hello,
                                    struct GNUNET_TIME_Absolute expiration_limit,
                                    GNUNET_HELLO_AddressIterator it,
                                    void *it_cls);


/**
 * Get the public key from a HELLO message.
 *
 * @param hello the hello message
 * @param publicKey where to copy the public key information, can be NULL
 * @return #GNUNET_SYSERR if the HELLO was malformed
 */
int
GNUNET_HELLO_get_key (const struct GNUNET_HELLO_Message *hello,
                      struct GNUNET_CRYPTO_EddsaPublicKey *publicKey);


/**
 * Get the peer identity from a HELLO message.
 *
 * @param hello the hello message
 * @param peer where to store the peer's identity
 * @return #GNUNET_SYSERR if the HELLO was malformed
 */
int
GNUNET_HELLO_get_id (const struct GNUNET_HELLO_Message *hello,
                     struct GNUNET_PeerIdentity *peer);


/**
 * Get the header from a HELLO message, used so other code
 * can correctly send HELLO messages.
 *
 * @param hello the hello message
 *
 * @return header or NULL if the HELLO was malformed
 */
struct GNUNET_MessageHeader *
GNUNET_HELLO_get_header (struct GNUNET_HELLO_Message *hello);


typedef struct GNUNET_TRANSPORT_PluginFunctions *
(*GNUNET_HELLO_TransportPluginsFind) (const char *name);


/**
 * Compose a hello URI string from a hello message.
 *
 * @param hello Hello message
 * @param plugins_find Function to find transport plugins by name
 * @return Hello URI string
 */
char *
GNUNET_HELLO_compose_uri (const struct GNUNET_HELLO_Message *hello,
                          GNUNET_HELLO_TransportPluginsFind plugins_find);


/**
 * Parse a hello URI string to a hello message.
 *
 * @param uri URI string to parse
 * @param pubkey Pointer to struct where public key is parsed
 * @param hello Pointer to struct where hello message is parsed
 * @param plugins_find Function to find transport plugins by name
 * @return #GNUNET_OK on success, #GNUNET_SYSERR if the URI was invalid, #GNUNET_NO on other errors
 */
int
GNUNET_HELLO_parse_uri (const char *uri,
                        struct GNUNET_CRYPTO_EddsaPublicKey *pubkey,
                        struct GNUNET_HELLO_Message **hello,
                        GNUNET_HELLO_TransportPluginsFind plugins_find);

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


/* ifndef GNUNET_HELLO_LIB_H */
#endif
/* end of gnunet_hello_lib.h */