aboutsummaryrefslogtreecommitdiff
path: root/src/transport/gnunet-service-transport_validation.h
blob: 53528437aedcc01e6acf8ca3557ae3baf33a7e34 (plain) (blame)
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
/*
     This file is part of GNUnet.
     Copyright (C) 2010,2011 GNUnet e.V.

     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., 51 Franklin Street, Fifth Floor,
     Boston, MA 02110-1301, USA.
*/

/**
 * @file transport/gnunet-service-transport_validation.h
 * @brief address validation API
 * @author Christian Grothoff
 */
#ifndef GNUNET_SERVICE_TRANSPORT_VALIDATION_H
#define GNUNET_SERVICE_TRANSPORT_VALIDATION_H

#include "gnunet_statistics_service.h"
#include "gnunet_transport_plugin.h"
#include "gnunet_util_lib.h"
#include "gnunet_hello_lib.h"

/**
 * Start the validation subsystem.
 *
 * @param max_fds maximum number of fds to use
 */
void
GST_validation_start (unsigned int max_fds);


/**
 * Stop the validation subsystem.
 */
void
GST_validation_stop (void);


/**
 * Update if we are using an address for a connection actively right now.
 * Based on this, the validation module will measure latency for the
 * address more or less often.
 *
 * @param address the address that we are now using (or not)
 * @param in_use #GNUNET_YES if we are now using the address for a connection,
 *               #GNUNET_NO if we are no longer using the address for a connection
 */
void
GST_validation_set_address_use (const struct GNUNET_HELLO_Address *address,
                                int in_use);


/**
 * We've received a PING.  If appropriate, generate a PONG.
 *
 * @param sender peer sending the PING
 * @param hdr the PING
 * @param sender_address address of the sender, NULL if we did not initiate
 * @param session session we got the PING from
 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
 */
int
GST_validation_handle_ping (const struct GNUNET_PeerIdentity *sender,
                            const struct GNUNET_MessageHeader *hdr,
                            const struct GNUNET_HELLO_Address *sender_address,
                            struct GNUNET_ATS_Session *session);


/**
 * We've received a PONG.  Check if it matches a pending PING and
 * mark the respective address as confirmed.
 *
 * @param sender peer sending the PONG
 * @param hdr the PONG
 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
 */
int
GST_validation_handle_pong (const struct GNUNET_PeerIdentity *sender,
                            const struct GNUNET_MessageHeader *hdr);


/**
 * We've received a HELLO, check which addresses are new and trigger
 * validation.
 *
 * @param hello the HELLO we received
 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
 */
int
GST_validation_handle_hello (const struct GNUNET_MessageHeader *hello);


/**
 * Validate an individual address.
 *
 * @param address address we should try to validate
 */
void
GST_validation_handle_address (const struct GNUNET_HELLO_Address *address);


/**
 * Function called for each address (or address status change) that
 * the validation module is aware of (for the given target).
 *
 * @param cls closure
 * @param public_key public key for the peer, never NULL
 * @param valid_until is ZERO if we never validated the address,
 *                    otherwise a time up to when we consider it (or was) valid
 * @param validation_block  is FOREVER if the address is for an unsupported plugin (from PEERINFO)
 *                          is ZERO if the address is considered valid (no validation needed)
 *                          otherwise a time in the future if we're currently denying re-validation
 * @param address the address
 */
typedef void
(*GST_ValidationAddressCallback) (void *cls,
                                  struct GNUNET_TIME_Absolute valid_until,
                                  struct GNUNET_TIME_Absolute validation_block,
                                  const struct GNUNET_HELLO_Address *address);


/**
 * Call the given function for each address for the given target.
 *
 * @param target peer information is requested for
 * @param cb function to call; will not be called after this function returns
 * @param cb_cls closure for @a cb
 */
void
GST_validation_get_addresses (const struct GNUNET_PeerIdentity *target,
                              GST_ValidationAddressCallback cb, void *cb_cls);


#endif
/* end of file gnunet-service-transport_validation.h */