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author | Nathan S. Evans <evans@in.tum.de> | 2011-07-11 09:40:00 +0000 |
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committer | Nathan S. Evans <evans@in.tum.de> | 2011-07-11 09:40:00 +0000 |
commit | 39c000246382f7772c3c6bb4c889373da5df5a9d (patch) | |
tree | f771bebf089ecd05baab8416347ca5f411b16c6e /src/transport/transport_api_address_iterate.c | |
parent | 1e463296e3635a4a82584a3c4e205e096ce53ad1 (diff) | |
download | gnunet-39c000246382f7772c3c6bb4c889373da5df5a9d.tar.gz gnunet-39c000246382f7772c3c6bb4c889373da5df5a9d.zip |
tool to list transport level connections
Diffstat (limited to 'src/transport/transport_api_address_iterate.c')
-rw-r--r-- | src/transport/transport_api_address_iterate.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/src/transport/transport_api_address_iterate.c b/src/transport/transport_api_address_iterate.c new file mode 100644 index 000000000..7bbeb499d --- /dev/null +++ b/src/transport/transport_api_address_iterate.c | |||
@@ -0,0 +1,164 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | (C) 2009, 2010 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 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., 59 Temple Place - Suite 330, | ||
18 | Boston, MA 02111-1307, USA. | ||
19 | */ | ||
20 | |||
21 | /** | ||
22 | * @file transport/transport_api_address_iterate.c | ||
23 | * @brief api for asking transport service to iterate over all | ||
24 | * known addresses | ||
25 | * | ||
26 | * This api provides a single function call to ask the transport | ||
27 | * service to list all peers and their known addresses, as pretty | ||
28 | * printed by the appropriate plugin. Reports whether or not the | ||
29 | * address is connected as well. | ||
30 | */ | ||
31 | |||
32 | #include "platform.h" | ||
33 | #include "gnunet_client_lib.h" | ||
34 | #include "gnunet_arm_service.h" | ||
35 | #include "gnunet_hello_lib.h" | ||
36 | #include "gnunet_protocols.h" | ||
37 | #include "gnunet_server_lib.h" | ||
38 | #include "gnunet_time_lib.h" | ||
39 | #include "gnunet_transport_service.h" | ||
40 | #include "transport.h" | ||
41 | |||
42 | /** | ||
43 | * Context for the address lookup. | ||
44 | */ | ||
45 | struct AddressLookupCtx | ||
46 | { | ||
47 | /** | ||
48 | * Function to call with the human-readable address. | ||
49 | */ | ||
50 | GNUNET_TRANSPORT_AddressLookUpCallback cb; | ||
51 | |||
52 | /** | ||
53 | * Closure for cb. | ||
54 | */ | ||
55 | void *cb_cls; | ||
56 | |||
57 | /** | ||
58 | * Connection to the service. | ||
59 | */ | ||
60 | struct GNUNET_CLIENT_Connection *client; | ||
61 | |||
62 | /** | ||
63 | * When should this operation time out? | ||
64 | */ | ||
65 | struct GNUNET_TIME_Absolute timeout; | ||
66 | }; | ||
67 | |||
68 | |||
69 | /** | ||
70 | * Function called with responses from the service. | ||
71 | * | ||
72 | * @param cls our 'struct AddressLookupCtx*' | ||
73 | * @param msg NULL on timeout or error, otherwise presumably a | ||
74 | * message with the human-readable peer and address | ||
75 | */ | ||
76 | static void | ||
77 | peer_address_response_processor (void *cls, | ||
78 | const struct GNUNET_MessageHeader *msg) | ||
79 | { | ||
80 | struct AddressLookupCtx *alucb = cls; | ||
81 | const char *address; | ||
82 | uint16_t size; | ||
83 | |||
84 | if (msg == NULL) | ||
85 | { | ||
86 | alucb->cb (alucb->cb_cls, NULL); | ||
87 | GNUNET_CLIENT_disconnect (alucb->client, GNUNET_NO); | ||
88 | GNUNET_free (alucb); | ||
89 | return; | ||
90 | } | ||
91 | GNUNET_break (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY); | ||
92 | size = ntohs (msg->size); | ||
93 | if (size == sizeof (struct GNUNET_MessageHeader)) | ||
94 | { | ||
95 | /* done! */ | ||
96 | alucb->cb (alucb->cb_cls, NULL); | ||
97 | GNUNET_CLIENT_disconnect (alucb->client, GNUNET_NO); | ||
98 | GNUNET_free (alucb); | ||
99 | return; | ||
100 | } | ||
101 | address = (const char *) &msg[1]; | ||
102 | if (address[size - sizeof (struct GNUNET_MessageHeader) - 1] != '\0') | ||
103 | { | ||
104 | /* invalid reply */ | ||
105 | GNUNET_break (0); | ||
106 | alucb->cb (alucb->cb_cls, NULL); | ||
107 | GNUNET_CLIENT_disconnect (alucb->client, GNUNET_NO); | ||
108 | GNUNET_free (alucb); | ||
109 | return; | ||
110 | } | ||
111 | /* expect more replies */ | ||
112 | GNUNET_CLIENT_receive (alucb->client, | ||
113 | &peer_address_response_processor, alucb, | ||
114 | GNUNET_TIME_absolute_get_remaining | ||
115 | (alucb->timeout)); | ||
116 | alucb->cb (alucb->cb_cls, address); | ||
117 | } | ||
118 | |||
119 | |||
120 | /** | ||
121 | * Return all the known addresses for a peer. | ||
122 | * | ||
123 | * @param cfg configuration to use | ||
124 | * @param timeout how long is the lookup allowed to take at most | ||
125 | * @param peer_address_callback function to call with the results | ||
126 | * @param peer_address_callback_cls closure for peer_address_callback | ||
127 | */ | ||
128 | void | ||
129 | GNUNET_TRANSPORT_address_iterate (const struct GNUNET_CONFIGURATION_Handle *cfg, | ||
130 | struct GNUNET_TIME_Relative timeout, | ||
131 | GNUNET_TRANSPORT_AddressLookUpCallback peer_address_callback, | ||
132 | void *peer_address_callback_cls) | ||
133 | { | ||
134 | struct AddressIterateMessage msg; | ||
135 | struct GNUNET_TIME_Absolute abs_timeout; | ||
136 | struct AddressLookupCtx *peer_address_lookup_cb; | ||
137 | struct GNUNET_CLIENT_Connection *client; | ||
138 | |||
139 | client = GNUNET_CLIENT_connect ("transport", cfg); | ||
140 | if (client == NULL) | ||
141 | { | ||
142 | peer_address_callback (peer_address_callback_cls, NULL); | ||
143 | return; | ||
144 | } | ||
145 | abs_timeout = GNUNET_TIME_relative_to_absolute (timeout); | ||
146 | |||
147 | msg.header.size = htons (sizeof(struct AddressLookupMessage)); | ||
148 | msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE); | ||
149 | msg.timeout = GNUNET_TIME_absolute_hton (abs_timeout); | ||
150 | peer_address_lookup_cb = GNUNET_malloc (sizeof (struct AddressLookupCtx)); | ||
151 | peer_address_lookup_cb->cb = peer_address_callback; | ||
152 | peer_address_lookup_cb->cb_cls = peer_address_callback_cls; | ||
153 | peer_address_lookup_cb->timeout = abs_timeout; | ||
154 | peer_address_lookup_cb->client = client; | ||
155 | GNUNET_assert (GNUNET_OK == | ||
156 | GNUNET_CLIENT_transmit_and_get_response (client, | ||
157 | &msg.header, | ||
158 | timeout, | ||
159 | GNUNET_YES, | ||
160 | &peer_address_response_processor, | ||
161 | peer_address_lookup_cb)); | ||
162 | } | ||
163 | |||
164 | /* end of transport_api_address_iterate.c */ | ||