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Diffstat (limited to 'src/service/messenger/messenger_api_list_tunnels.h')
-rw-r--r-- | src/service/messenger/messenger_api_list_tunnels.h | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/src/service/messenger/messenger_api_list_tunnels.h b/src/service/messenger/messenger_api_list_tunnels.h new file mode 100644 index 000000000..e4b709c3b --- /dev/null +++ b/src/service/messenger/messenger_api_list_tunnels.h | |||
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1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | Copyright (C) 2020--2023 GNUnet e.V. | ||
4 | |||
5 | GNUnet is free software: you can redistribute it and/or modify it | ||
6 | under the terms of the GNU Affero General Public License as published | ||
7 | by the Free Software Foundation, either version 3 of the License, | ||
8 | or (at your option) any later version. | ||
9 | |||
10 | GNUnet is distributed in the hope that it will be useful, but | ||
11 | WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | Affero General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU Affero General Public License | ||
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
17 | |||
18 | SPDX-License-Identifier: AGPL3.0-or-later | ||
19 | */ | ||
20 | /** | ||
21 | * @author Tobias Frisch | ||
22 | * @file src/messenger/messenger_api_list_tunnels.h | ||
23 | * @brief messenger api: client and service implementation of GNUnet MESSENGER service | ||
24 | */ | ||
25 | |||
26 | #ifndef GNUNET_MESSENGER_API_LIST_TUNNELS_H | ||
27 | #define GNUNET_MESSENGER_API_LIST_TUNNELS_H | ||
28 | |||
29 | #include "gnunet_messenger_service.h" | ||
30 | #include "gnunet_util_lib.h" | ||
31 | |||
32 | struct GNUNET_MESSENGER_ListTunnel | ||
33 | { | ||
34 | struct GNUNET_MESSENGER_ListTunnel *prev; | ||
35 | struct GNUNET_MESSENGER_ListTunnel *next; | ||
36 | |||
37 | GNUNET_PEER_Id peer; | ||
38 | struct GNUNET_HashCode *hash; | ||
39 | |||
40 | struct GNUNET_MESSENGER_MessageConnection connection; | ||
41 | }; | ||
42 | |||
43 | struct GNUNET_MESSENGER_ListTunnels | ||
44 | { | ||
45 | struct GNUNET_MESSENGER_ListTunnel *head; | ||
46 | struct GNUNET_MESSENGER_ListTunnel *tail; | ||
47 | }; | ||
48 | |||
49 | /** | ||
50 | * Initializes list of tunnels peer identities as empty list. | ||
51 | * | ||
52 | * @param[out] tunnels List of tunnels | ||
53 | */ | ||
54 | void | ||
55 | init_list_tunnels (struct GNUNET_MESSENGER_ListTunnels *tunnels); | ||
56 | |||
57 | /** | ||
58 | * Clears the list of tunnels peer identities. | ||
59 | * | ||
60 | * @param[in,out] tunnels List of tunnels | ||
61 | */ | ||
62 | void | ||
63 | clear_list_tunnels (struct GNUNET_MESSENGER_ListTunnels *tunnels); | ||
64 | |||
65 | /** | ||
66 | * Adds a specific <i>peer</i> from a tunnel to the end of the list. | ||
67 | * | ||
68 | * Optionally adds the <i>hash</i> of the peer message from the specific <i>peer</i>. | ||
69 | * | ||
70 | * @param[in,out] tunnels List of tunnels | ||
71 | * @param[in] peer Peer identity of tunnel | ||
72 | * @param[in] hash Hash of peer message or NULL | ||
73 | */ | ||
74 | void | ||
75 | add_to_list_tunnels (struct GNUNET_MESSENGER_ListTunnels *tunnels, | ||
76 | const struct GNUNET_PeerIdentity *peer, | ||
77 | const struct GNUNET_HashCode *hash); | ||
78 | |||
79 | /** | ||
80 | * Searches linearly through the list of tunnels peer identities for matching a | ||
81 | * specific <i>peer</i> identity and returns the matching element of the list. | ||
82 | * | ||
83 | * If no matching element is found, NULL gets returned. | ||
84 | * | ||
85 | * If <i>index</i> is not NULL, <i>index</i> will be overridden with the numeric index of | ||
86 | * the found element in the list. If no matching element is found, <i>index</i> will | ||
87 | * contain the total amount of elements in the list. | ||
88 | * | ||
89 | * @param[in,out] tunnels List of tunnels | ||
90 | * @param[in] peer Peer identity of tunnel | ||
91 | * @param[out] index Index of found element (optional) | ||
92 | * @return Element in the list with matching peer identity | ||
93 | */ | ||
94 | struct GNUNET_MESSENGER_ListTunnel* | ||
95 | find_list_tunnels (struct GNUNET_MESSENGER_ListTunnels *tunnels, | ||
96 | const struct GNUNET_PeerIdentity *peer, | ||
97 | size_t *index); | ||
98 | |||
99 | /** | ||
100 | * Searches linearly through the list of tunnels peer identities for matching | ||
101 | * against a specific <i>peer</i> identity and returns an element of the list | ||
102 | * which does not match it. | ||
103 | * | ||
104 | * @param[in,out] tunnels List of tunnels | ||
105 | * @param[in] peer Peer identity of tunnel | ||
106 | * @return Element in the list with unmatching peer identity | ||
107 | */ | ||
108 | struct GNUNET_MESSENGER_ListTunnel* | ||
109 | find_list_tunnels_alternate (struct GNUNET_MESSENGER_ListTunnels *tunnels, | ||
110 | const struct GNUNET_PeerIdentity *peer); | ||
111 | |||
112 | /** | ||
113 | * Verifies that a specific tunnel selected by its <i>peer</i> identity in a | ||
114 | * list of <i>tunnels</i> is the first in order with a given connection <i>flag</i>. | ||
115 | * | ||
116 | * @param[in] tunnels List of tunnels | ||
117 | * @param[in] peer Peer identity of tunnel | ||
118 | * @param[in] flag Connection flag mask | ||
119 | * @return #GNUNET_OK on success, otherwise #GNUNET_SYSERR | ||
120 | */ | ||
121 | enum GNUNET_GenericReturnValue | ||
122 | verify_list_tunnels_flag_token (const struct | ||
123 | GNUNET_MESSENGER_ListTunnels *tunnels, | ||
124 | const struct GNUNET_PeerIdentity *peer, | ||
125 | enum GNUNET_MESSENGER_ConnectionFlags flag); | ||
126 | |||
127 | /** | ||
128 | * Updates a specific <i>peer</i> from a tunnel in the list. | ||
129 | * | ||
130 | * This function exists to add the <i>hash</i> of a newer peer message | ||
131 | * from the specific <i>peer</i> to the list element. It can also remove | ||
132 | * the hash when NULL is provided as new <i>hash</i> value. | ||
133 | * | ||
134 | * @param[in,out] tunnels List of tunnels | ||
135 | * @param[in] peer Peer identity of tunnel | ||
136 | * @param[in] hash Hash of peer message or NULL | ||
137 | */ | ||
138 | void | ||
139 | update_to_list_tunnels (struct GNUNET_MESSENGER_ListTunnels *tunnels, | ||
140 | const struct GNUNET_PeerIdentity *peer, | ||
141 | const struct GNUNET_HashCode *hash); | ||
142 | |||
143 | /** | ||
144 | * Tests linearly if the list of tunnels peer identities contains a specific | ||
145 | * <i>peer</i> identity and returns #GNUNET_YES on success, otherwise #GNUNET_NO. | ||
146 | * | ||
147 | * @param[in,out] tunnels List of tunnels | ||
148 | * @param[in] peer Peer identity of tunnel | ||
149 | * @return #GNUNET_YES on success, otherwise #GNUNET_NO | ||
150 | */ | ||
151 | enum GNUNET_GenericReturnValue | ||
152 | contains_list_tunnels (struct GNUNET_MESSENGER_ListTunnels *tunnels, | ||
153 | const struct GNUNET_PeerIdentity *peer); | ||
154 | |||
155 | /** | ||
156 | * Removes a specific <i>element</i> from the list of tunnels peer identities and returns | ||
157 | * the next element in the list. | ||
158 | * | ||
159 | * @param[in,out] tunnels List of tunnels | ||
160 | * @param[in,out] element Element of the list | ||
161 | * @return Next element in the list | ||
162 | */ | ||
163 | struct GNUNET_MESSENGER_ListTunnel* | ||
164 | remove_from_list_tunnels (struct GNUNET_MESSENGER_ListTunnels *tunnels, | ||
165 | struct GNUNET_MESSENGER_ListTunnel *element); | ||
166 | |||
167 | /** | ||
168 | * Loads the list of tunnels peer identities from a file under a given <i>path</i>. | ||
169 | * | ||
170 | * @param[out] tunnels List of tunnels | ||
171 | * @param[in] path Path of file | ||
172 | */ | ||
173 | void | ||
174 | load_list_tunnels (struct GNUNET_MESSENGER_ListTunnels *tunnels, | ||
175 | const char *path); | ||
176 | |||
177 | /** | ||
178 | * Saves the list of tunnels peer identities to a file under a given <i>path</i>. | ||
179 | * | ||
180 | * @param[in] tunnels List of tunnels | ||
181 | * @param[in] path Path of file | ||
182 | */ | ||
183 | void | ||
184 | save_list_tunnels (struct GNUNET_MESSENGER_ListTunnels *tunnels, | ||
185 | const char *path); | ||
186 | |||
187 | #endif //GNUNET_MESSENGER_API_LIST_TUNNELS_H | ||