diff options
Diffstat (limited to 'src/cadet/gnunet-service-cadet_hello.c')
-rw-r--r-- | src/cadet/gnunet-service-cadet_hello.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/src/cadet/gnunet-service-cadet_hello.c b/src/cadet/gnunet-service-cadet_hello.c new file mode 100644 index 000000000..6d85de39f --- /dev/null +++ b/src/cadet/gnunet-service-cadet_hello.c | |||
@@ -0,0 +1,152 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | Copyright (C) 2014, 2017 GNUnet e.V. | ||
4 | |||
5 | GNUnet is free software; you can redistribute it and/or modify | ||
6 | it under the terms of the GNU General Public License as published | ||
7 | by the Free Software Foundation; either version 3, or (at your | ||
8 | 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 | General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU General Public License | ||
16 | along with GNUnet; see the file COPYING. If not, write to the | ||
17 | Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | ||
18 | Boston, MA 02110-1301, USA. | ||
19 | */ | ||
20 | /** | ||
21 | * @file cadet/gnunet-service-cadet_hello.c | ||
22 | * @brief spread knowledge about how to contact other peers from PEERINFO | ||
23 | * @author Bartlomiej Polot | ||
24 | * @author Christian Grothoff | ||
25 | * | ||
26 | * TODO: | ||
27 | * - is most of this necessary/helpful? | ||
28 | * - should we not simply restrict this to OUR hello? | ||
29 | */ | ||
30 | #include "platform.h" | ||
31 | #include "gnunet_util_lib.h" | ||
32 | |||
33 | #include "gnunet_statistics_service.h" | ||
34 | #include "gnunet_peerinfo_service.h" | ||
35 | #include "cadet_protocol.h" | ||
36 | #include "gnunet-service-cadet.h" | ||
37 | #include "gnunet-service-cadet_dht.h" | ||
38 | #include "gnunet-service-cadet_hello.h" | ||
39 | #include "gnunet-service-cadet_peer.h" | ||
40 | |||
41 | #define LOG(level, ...) GNUNET_log_from(level,"cadet-hll",__VA_ARGS__) | ||
42 | |||
43 | /** | ||
44 | * Hello message of local peer. | ||
45 | */ | ||
46 | static struct GNUNET_HELLO_Message *mine; | ||
47 | |||
48 | /** | ||
49 | * Handle to peerinfo service. | ||
50 | */ | ||
51 | static struct GNUNET_PEERINFO_Handle *peerinfo; | ||
52 | |||
53 | /** | ||
54 | * Iterator context. | ||
55 | */ | ||
56 | static struct GNUNET_PEERINFO_NotifyContext *nc; | ||
57 | |||
58 | |||
59 | /** | ||
60 | * Process each hello message received from peerinfo. | ||
61 | * | ||
62 | * @param cls Closure (unused). | ||
63 | * @param peer Identity of the peer. | ||
64 | * @param hello Hello of the peer. | ||
65 | * @param err_msg Error message. | ||
66 | */ | ||
67 | static void | ||
68 | got_hello (void *cls, | ||
69 | const struct GNUNET_PeerIdentity *id, | ||
70 | const struct GNUNET_HELLO_Message *hello, | ||
71 | const char *err_msg) | ||
72 | { | ||
73 | struct CadetPeer *peer; | ||
74 | |||
75 | if ( (NULL == id) || | ||
76 | (NULL == hello) ) | ||
77 | return; | ||
78 | if (0 == memcmp (id, | ||
79 | &my_full_id, | ||
80 | sizeof (struct GNUNET_PeerIdentity))) | ||
81 | { | ||
82 | GNUNET_free_non_null (mine); | ||
83 | mine = (struct GNUNET_HELLO_Message *) GNUNET_copy_message (&hello->header); | ||
84 | GCD_hello_update (); | ||
85 | return; | ||
86 | } | ||
87 | |||
88 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
89 | "Hello for %s (%d bytes), expires on %s\n", | ||
90 | GNUNET_i2s (id), | ||
91 | GNUNET_HELLO_size (hello), | ||
92 | GNUNET_STRINGS_absolute_time_to_string (GNUNET_HELLO_get_last_expiration (hello))); | ||
93 | peer = GCP_get (id, | ||
94 | GNUNET_YES); | ||
95 | GCP_set_hello (peer, | ||
96 | hello); | ||
97 | } | ||
98 | |||
99 | |||
100 | /** | ||
101 | * Initialize the hello subsystem. | ||
102 | * | ||
103 | * @param c Configuration. | ||
104 | */ | ||
105 | void | ||
106 | GCH_init (const struct GNUNET_CONFIGURATION_Handle *c) | ||
107 | { | ||
108 | GNUNET_assert (NULL == nc); | ||
109 | peerinfo = GNUNET_PEERINFO_connect (c); | ||
110 | nc = GNUNET_PEERINFO_notify (c, | ||
111 | GNUNET_NO, | ||
112 | &got_hello, | ||
113 | NULL); | ||
114 | } | ||
115 | |||
116 | |||
117 | /** | ||
118 | * Shut down the hello subsystem. | ||
119 | */ | ||
120 | void | ||
121 | GCH_shutdown () | ||
122 | { | ||
123 | if (NULL != nc) | ||
124 | { | ||
125 | GNUNET_PEERINFO_notify_cancel (nc); | ||
126 | nc = NULL; | ||
127 | } | ||
128 | if (NULL != peerinfo) | ||
129 | { | ||
130 | GNUNET_PEERINFO_disconnect (peerinfo); | ||
131 | peerinfo = NULL; | ||
132 | } | ||
133 | if (NULL != mine) | ||
134 | { | ||
135 | GNUNET_free (mine); | ||
136 | mine = NULL; | ||
137 | } | ||
138 | } | ||
139 | |||
140 | |||
141 | /** | ||
142 | * Get own hello message. | ||
143 | * | ||
144 | * @return Own hello message. | ||
145 | */ | ||
146 | const struct GNUNET_HELLO_Message * | ||
147 | GCH_get_mine (void) | ||
148 | { | ||
149 | return mine; | ||
150 | } | ||
151 | |||
152 | /* end of gnunet-service-cadet-new_hello.c */ | ||