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author | Christian Grothoff <christian@grothoff.org> | 2013-08-24 15:54:21 +0000 |
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committer | Christian Grothoff <christian@grothoff.org> | 2013-08-24 15:54:21 +0000 |
commit | 0baf38e846d5a4cd5b5b4c2ec900762fceb87712 (patch) | |
tree | 0f54a86cd481c2ea93aea18e217b71a6a578114c /src/identity/identity_api_lookup.c | |
parent | 5d8db7e97036433978f995389eac3997dae282e1 (diff) | |
download | gnunet-0baf38e846d5a4cd5b5b4c2ec900762fceb87712.tar.gz gnunet-0baf38e846d5a4cd5b5b4c2ec900762fceb87712.zip |
-more convenient API to lookup egos
Diffstat (limited to 'src/identity/identity_api_lookup.c')
-rw-r--r-- | src/identity/identity_api_lookup.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/src/identity/identity_api_lookup.c b/src/identity/identity_api_lookup.c new file mode 100644 index 000000000..1d45136e3 --- /dev/null +++ b/src/identity/identity_api_lookup.c | |||
@@ -0,0 +1,154 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | (C) 2013 Christian Grothoff (and other contributing authors) | ||
4 | |||
5 | GNUnet is free software; you can redistribute it and/or modify | ||
6 | it under the terms of the GNU General Public Liceidentity 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 Liceidentity for more details. | ||
14 | |||
15 | You should have received a copy of the GNU General Public Liceidentity | ||
16 | along with GNUnet; see the file COPYING. If not, write to the | ||
17 | Free Software Foundation, Inc., 59 Temple Place - Suite 330, | ||
18 | Boston, MA 02111-1307, USA. | ||
19 | */ | ||
20 | |||
21 | /** | ||
22 | * @file identity/identity_api_lookup.c | ||
23 | * @brief api to lookup an ego | ||
24 | * @author Christian Grothoff | ||
25 | */ | ||
26 | #include "platform.h" | ||
27 | #include "gnunet_util_lib.h" | ||
28 | #include "gnunet_identity_service.h" | ||
29 | |||
30 | #define LOG(kind,...) GNUNET_log_from (kind, "identity-api",__VA_ARGS__) | ||
31 | |||
32 | |||
33 | /** | ||
34 | * Handle for ego lookup. | ||
35 | */ | ||
36 | struct GNUNET_IDENTITY_EgoLookup | ||
37 | { | ||
38 | |||
39 | /** | ||
40 | * Handle to the identity service. | ||
41 | */ | ||
42 | struct GNUNET_IDENTITY_Handle *identity; | ||
43 | |||
44 | /** | ||
45 | * Name of the ego we are looking up. | ||
46 | */ | ||
47 | char *name; | ||
48 | |||
49 | /** | ||
50 | * Function to call with the result. | ||
51 | */ | ||
52 | GNUNET_IDENTITY_EgoCallback cb; | ||
53 | |||
54 | /** | ||
55 | * Closure for @e cb | ||
56 | */ | ||
57 | void *cb_cls; | ||
58 | }; | ||
59 | |||
60 | |||
61 | /** | ||
62 | * Method called to inform about the egos of this peer. | ||
63 | * | ||
64 | * When used with #GNUNET_IDENTITY_connect, this function is | ||
65 | * initially called for all egos and then again whenever a | ||
66 | * ego's name changes or if it is deleted. At the end of | ||
67 | * the initial pass over all egos, the function is once called | ||
68 | * with 'NULL' for @a ego. That does NOT mean that the callback won't | ||
69 | * be invoked in the future or that there was an error. | ||
70 | * | ||
71 | * If the @a name matches the name from @a cls, we found the zone | ||
72 | * for our computation and will invoke the callback. | ||
73 | * If we have iterated over all egos and not found the name, we | ||
74 | * invoke the callback with NULL. | ||
75 | * | ||
76 | * @param cls closure with the `struct GNUNET_IDENTITY_EgoLookup` | ||
77 | * @param ego ego handle | ||
78 | * @param ego_ctx context for application to store data for this ego | ||
79 | * (during the lifetime of this process, initially NULL) | ||
80 | * @param name name assigned by the user for this ego, | ||
81 | * NULL if the user just deleted the ego and it | ||
82 | * must thus no longer be used | ||
83 | */ | ||
84 | static void | ||
85 | identity_cb (void *cls, | ||
86 | struct GNUNET_IDENTITY_Ego *ego, | ||
87 | void **ctx, | ||
88 | const char *name) | ||
89 | { | ||
90 | struct GNUNET_IDENTITY_EgoLookup *el = cls; | ||
91 | |||
92 | if ( (NULL != name) && | ||
93 | (0 == strcmp (name, | ||
94 | el->name)) ) | ||
95 | { | ||
96 | el->cb (el->cb_cls, | ||
97 | ego); | ||
98 | GNUNET_IDENTITY_ego_lookup_cancel (el); | ||
99 | return; | ||
100 | } | ||
101 | if (NULL == ego) | ||
102 | { | ||
103 | /* not found */ | ||
104 | el->cb (el->cb_cls, | ||
105 | NULL); | ||
106 | GNUNET_IDENTITY_ego_lookup_cancel (el); | ||
107 | return; | ||
108 | } | ||
109 | } | ||
110 | |||
111 | |||
112 | /** | ||
113 | * Lookup an ego by name. | ||
114 | * | ||
115 | * @param cfg configuration to use | ||
116 | * @param name name to look up | ||
117 | * @param cb callback to invoke with the result | ||
118 | * @param cb_cls closure for @a cb | ||
119 | * @return NULL on error | ||
120 | */ | ||
121 | struct GNUNET_IDENTITY_EgoLookup * | ||
122 | GNUNET_IDENTITY_ego_lookup (const struct GNUNET_CONFIGURATION_Handle *cfg, | ||
123 | const char *name, | ||
124 | GNUNET_IDENTITY_EgoCallback cb, | ||
125 | void *cb_cls) | ||
126 | { | ||
127 | struct GNUNET_IDENTITY_EgoLookup *el; | ||
128 | |||
129 | el = GNUNET_new (struct GNUNET_IDENTITY_EgoLookup); | ||
130 | el->name = GNUNET_strdup (name); | ||
131 | el->cb = cb; | ||
132 | el->cb_cls = cb_cls; | ||
133 | el->identity = GNUNET_IDENTITY_connect (cfg, | ||
134 | &identity_cb, | ||
135 | el); | ||
136 | return el; | ||
137 | } | ||
138 | |||
139 | |||
140 | /** | ||
141 | * Abort ego lookup attempt. | ||
142 | * | ||
143 | * @param el handle for lookup to abort | ||
144 | */ | ||
145 | void | ||
146 | GNUNET_IDENTITY_ego_lookup_cancel (struct GNUNET_IDENTITY_EgoLookup *el) | ||
147 | { | ||
148 | GNUNET_IDENTITY_disconnect (el->identity); | ||
149 | GNUNET_free (el->name); | ||
150 | GNUNET_free (el); | ||
151 | } | ||
152 | |||
153 | |||
154 | /* end of identity_api_lookup.c */ | ||