diff options
Diffstat (limited to 'src/transport/transport_api_address_to_string.c')
-rw-r--r-- | src/transport/transport_api_address_to_string.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/src/transport/transport_api_address_to_string.c b/src/transport/transport_api_address_to_string.c new file mode 100644 index 000000000..259c77152 --- /dev/null +++ b/src/transport/transport_api_address_to_string.c | |||
@@ -0,0 +1,184 @@ | |||
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 | #include "platform.h" | ||
21 | #include "gnunet_client_lib.h" | ||
22 | #include "gnunet_arm_service.h" | ||
23 | #include "gnunet_hello_lib.h" | ||
24 | #include "gnunet_protocols.h" | ||
25 | #include "gnunet_server_lib.h" | ||
26 | #include "gnunet_time_lib.h" | ||
27 | #include "gnunet_transport_service.h" | ||
28 | #include "transport.h" | ||
29 | |||
30 | /** | ||
31 | * Context for the address lookup. | ||
32 | */ | ||
33 | struct GNUNET_TRANSPORT_AddressToStringContext | ||
34 | { | ||
35 | /** | ||
36 | * Function to call with the human-readable address. | ||
37 | */ | ||
38 | GNUNET_TRANSPORT_AddressToStringCallback cb; | ||
39 | |||
40 | /** | ||
41 | * Closure for cb. | ||
42 | */ | ||
43 | void *cb_cls; | ||
44 | |||
45 | /** | ||
46 | * Connection to the service. | ||
47 | */ | ||
48 | struct GNUNET_CLIENT_Connection *client; | ||
49 | |||
50 | /** | ||
51 | * When should this operation time out? | ||
52 | */ | ||
53 | struct GNUNET_TIME_Absolute timeout; | ||
54 | }; | ||
55 | |||
56 | |||
57 | /** | ||
58 | * Function called with responses from the service. | ||
59 | * | ||
60 | * @param cls our 'struct GNUNET_TRANSPORT_AddressLookupContext*' | ||
61 | * @param msg NULL on timeout or error, otherwise presumably a | ||
62 | * message with the human-readable address | ||
63 | */ | ||
64 | static void | ||
65 | address_response_processor (void *cls, const struct GNUNET_MessageHeader *msg) | ||
66 | { | ||
67 | struct GNUNET_TRANSPORT_AddressToStringContext *alucb = cls; | ||
68 | const char *address; | ||
69 | uint16_t size; | ||
70 | |||
71 | if (msg == NULL) | ||
72 | { | ||
73 | alucb->cb (alucb->cb_cls, NULL); | ||
74 | GNUNET_CLIENT_disconnect (alucb->client, GNUNET_NO); | ||
75 | GNUNET_free (alucb); | ||
76 | return; | ||
77 | } | ||
78 | GNUNET_break (ntohs (msg->type) == | ||
79 | GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY); | ||
80 | size = ntohs (msg->size); | ||
81 | if (size == sizeof (struct GNUNET_MessageHeader)) | ||
82 | { | ||
83 | /* done! */ | ||
84 | alucb->cb (alucb->cb_cls, NULL); | ||
85 | GNUNET_CLIENT_disconnect (alucb->client, GNUNET_NO); | ||
86 | GNUNET_free (alucb); | ||
87 | return; | ||
88 | } | ||
89 | address = (const char *) &msg[1]; | ||
90 | if (address[size - sizeof (struct GNUNET_MessageHeader) - 1] != '\0') | ||
91 | { | ||
92 | /* invalid reply */ | ||
93 | GNUNET_break (0); | ||
94 | alucb->cb (alucb->cb_cls, NULL); | ||
95 | GNUNET_CLIENT_disconnect (alucb->client, GNUNET_NO); | ||
96 | GNUNET_free (alucb); | ||
97 | return; | ||
98 | } | ||
99 | /* expect more replies */ | ||
100 | GNUNET_CLIENT_receive (alucb->client, &address_response_processor, alucb, | ||
101 | GNUNET_TIME_absolute_get_remaining (alucb->timeout)); | ||
102 | alucb->cb (alucb->cb_cls, address); | ||
103 | } | ||
104 | |||
105 | |||
106 | /** | ||
107 | * Convert a binary address into a human readable address. | ||
108 | * | ||
109 | * @param cfg configuration to use | ||
110 | * @param address address to convert (binary format) | ||
111 | * @param addressLen number of bytes in address | ||
112 | * @param numeric should (IP) addresses be displayed in numeric form | ||
113 | * (otherwise do reverse DNS lookup) | ||
114 | * @param nameTrans name of the transport to which the address belongs | ||
115 | * @param timeout how long is the lookup allowed to take at most | ||
116 | * @param aluc function to call with the results | ||
117 | * @param aluc_cls closure for aluc | ||
118 | * @return handle to cancel the operation, NULL on error | ||
119 | */ | ||
120 | struct GNUNET_TRANSPORT_AddressToStringContext * | ||
121 | GNUNET_TRANSPORT_address_to_string (const struct GNUNET_CONFIGURATION_Handle *cfg, | ||
122 | const struct GNUNET_HELLO_Address *address, | ||
123 | int numeric, | ||
124 | struct GNUNET_TIME_Relative timeout, | ||
125 | GNUNET_TRANSPORT_AddressToStringCallback aluc, | ||
126 | void *aluc_cls) | ||
127 | { | ||
128 | size_t len; | ||
129 | size_t alen; | ||
130 | struct AddressLookupMessage *msg; | ||
131 | struct GNUNET_TRANSPORT_AddressToStringContext *alc; | ||
132 | struct GNUNET_CLIENT_Connection *client; | ||
133 | char *addrbuf; | ||
134 | |||
135 | alen = GNUNET_HELLO_address_get_size (address); | ||
136 | len = sizeof (struct AddressLookupMessage) + alen; | ||
137 | if (len >= GNUNET_SERVER_MAX_MESSAGE_SIZE) | ||
138 | { | ||
139 | GNUNET_break (0); | ||
140 | return NULL; | ||
141 | } | ||
142 | client = GNUNET_CLIENT_connect ("transport", cfg); | ||
143 | if (client == NULL) | ||
144 | return NULL; | ||
145 | msg = GNUNET_malloc (len); | ||
146 | msg->header.size = htons (len); | ||
147 | msg->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_LOOKUP); | ||
148 | msg->numeric_only = htonl (numeric); | ||
149 | msg->timeout = GNUNET_TIME_relative_hton (timeout); | ||
150 | msg->addrlen = htonl (alen); | ||
151 | addrbuf = (char *) &msg[1]; | ||
152 | memcpy (addrbuf, address, alen); | ||
153 | alc = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_AddressToStringContext)); | ||
154 | alc->cb = aluc; | ||
155 | alc->cb_cls = aluc_cls; | ||
156 | alc->timeout = GNUNET_TIME_relative_to_absolute (timeout); | ||
157 | alc->client = client; | ||
158 | GNUNET_assert (GNUNET_OK == | ||
159 | GNUNET_CLIENT_transmit_and_get_response (client, &msg->header, | ||
160 | timeout, GNUNET_YES, | ||
161 | &address_response_processor, | ||
162 | alc)); | ||
163 | GNUNET_free (msg); | ||
164 | return alc; | ||
165 | } | ||
166 | |||
167 | |||
168 | /** | ||
169 | * Cancel request for address conversion. | ||
170 | * | ||
171 | * @param alc handle for the request to cancel | ||
172 | */ | ||
173 | void | ||
174 | GNUNET_TRANSPORT_address_to_string_cancel (struct | ||
175 | GNUNET_TRANSPORT_AddressToStringContext | ||
176 | *alc) | ||
177 | { | ||
178 | GNUNET_CLIENT_disconnect (alc->client, GNUNET_NO); | ||
179 | GNUNET_free (alc); | ||
180 | } | ||
181 | |||
182 | |||
183 | |||
184 | /* end of transport_api_address_lookup.c */ | ||