diff options
Diffstat (limited to 'src/transport/transport_api_address_to_string.c')
-rw-r--r-- | src/transport/transport_api_address_to_string.c | 264 |
1 files changed, 0 insertions, 264 deletions
diff --git a/src/transport/transport_api_address_to_string.c b/src/transport/transport_api_address_to_string.c deleted file mode 100644 index c7de39ea8..000000000 --- a/src/transport/transport_api_address_to_string.c +++ /dev/null | |||
@@ -1,264 +0,0 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | Copyright (C) 2009-2014, 2016 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 | * @file transport/transport_api_address_to_string.c | ||
22 | * @author Christian Grothoff | ||
23 | * @brief enable clients to convert addresses to human readable strings | ||
24 | */ | ||
25 | #include "platform.h" | ||
26 | #include "gnunet_util_lib.h" | ||
27 | #include "gnunet_arm_service.h" | ||
28 | #include "gnunet_hello_lib.h" | ||
29 | #include "gnunet_protocols.h" | ||
30 | #include "gnunet_transport_service.h" | ||
31 | #include "transport.h" | ||
32 | |||
33 | /** | ||
34 | * Context for the address lookup. | ||
35 | */ | ||
36 | struct GNUNET_TRANSPORT_AddressToStringContext | ||
37 | { | ||
38 | /** | ||
39 | * Function to call with the human-readable address. | ||
40 | */ | ||
41 | GNUNET_TRANSPORT_AddressToStringCallback cb; | ||
42 | |||
43 | /** | ||
44 | * Closure for @e cb. | ||
45 | */ | ||
46 | void *cb_cls; | ||
47 | |||
48 | /** | ||
49 | * Connection to the service. | ||
50 | */ | ||
51 | struct GNUNET_MQ_Handle *mq; | ||
52 | }; | ||
53 | |||
54 | |||
55 | /** | ||
56 | * Function called with responses from the service. | ||
57 | * | ||
58 | * @param cls our `struct GNUNET_TRANSPORT_AddressToStringContext *` | ||
59 | * @param msg message with the human-readable address | ||
60 | * @return #GNUNET_OK if message is well-formed | ||
61 | */ | ||
62 | static int | ||
63 | check_reply (void *cls, | ||
64 | const struct AddressToStringResultMessage *atsm) | ||
65 | { | ||
66 | uint16_t size = ntohs (atsm->header.size) - sizeof(*atsm); | ||
67 | const char *address; | ||
68 | int result; | ||
69 | uint32_t addr_len; | ||
70 | |||
71 | result = (int) ntohl (atsm->res); | ||
72 | addr_len = ntohl (atsm->addr_len); | ||
73 | if (GNUNET_SYSERR == result) | ||
74 | return GNUNET_OK; | ||
75 | if (0 == size) | ||
76 | { | ||
77 | if (GNUNET_OK != result) | ||
78 | { | ||
79 | GNUNET_break (0); | ||
80 | return GNUNET_SYSERR; | ||
81 | } | ||
82 | return GNUNET_OK; | ||
83 | } | ||
84 | address = (const char *) &atsm[1]; | ||
85 | if ((addr_len > size) || | ||
86 | (address[addr_len - 1] != '\0')) | ||
87 | { | ||
88 | /* invalid reply */ | ||
89 | GNUNET_break (0); | ||
90 | return GNUNET_SYSERR; | ||
91 | } | ||
92 | return GNUNET_OK; | ||
93 | } | ||
94 | |||
95 | |||
96 | /** | ||
97 | * Function called with responses from the service. | ||
98 | * | ||
99 | * @param cls our `struct GNUNET_TRANSPORT_AddressToStringContext *` | ||
100 | * @param msg message with the human-readable address | ||
101 | */ | ||
102 | static void | ||
103 | handle_reply (void *cls, | ||
104 | const struct AddressToStringResultMessage *atsm) | ||
105 | { | ||
106 | struct GNUNET_TRANSPORT_AddressToStringContext *alucb = cls; | ||
107 | uint16_t size = ntohs (atsm->header.size) - sizeof(*atsm); | ||
108 | const char *address; | ||
109 | int result; | ||
110 | |||
111 | result = (int) ntohl (atsm->res); | ||
112 | if (GNUNET_SYSERR == result) | ||
113 | { | ||
114 | /* expect more replies; as this is not the last | ||
115 | call, we must pass the empty string for the address */ | ||
116 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
117 | "Address resolution failed\n"); | ||
118 | alucb->cb (alucb->cb_cls, | ||
119 | "", | ||
120 | GNUNET_NO); | ||
121 | return; | ||
122 | } | ||
123 | if (0 == size) | ||
124 | { | ||
125 | /* we are done (successfully, without communication errors) */ | ||
126 | alucb->cb (alucb->cb_cls, | ||
127 | NULL, | ||
128 | GNUNET_OK); | ||
129 | GNUNET_TRANSPORT_address_to_string_cancel (alucb); | ||
130 | return; | ||
131 | } | ||
132 | address = (const char *) &atsm[1]; | ||
133 | /* return normal reply to caller, also expect more replies */ | ||
134 | alucb->cb (alucb->cb_cls, | ||
135 | address, | ||
136 | GNUNET_OK); | ||
137 | } | ||
138 | |||
139 | |||
140 | /** | ||
141 | * Generic error handler, called with the appropriate | ||
142 | * error code and the same closure specified at the creation of | ||
143 | * the message queue. | ||
144 | * Not every message queue implementation supports an error handler. | ||
145 | * | ||
146 | * @param cls the `struct GNUNET_TRANSPORT_AddressToStringContext *` | ||
147 | * @param error error code | ||
148 | */ | ||
149 | static void | ||
150 | mq_error_handler (void *cls, | ||
151 | enum GNUNET_MQ_Error error) | ||
152 | { | ||
153 | struct GNUNET_TRANSPORT_AddressToStringContext *alucb = cls; | ||
154 | |||
155 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
156 | "Disconnected from transport, address resolution failed\n"); | ||
157 | alucb->cb (alucb->cb_cls, | ||
158 | NULL, | ||
159 | GNUNET_SYSERR); | ||
160 | GNUNET_TRANSPORT_address_to_string_cancel (alucb); | ||
161 | } | ||
162 | |||
163 | |||
164 | /** | ||
165 | * Convert a binary address into a human readable address. | ||
166 | * | ||
167 | * @param cfg configuration to use | ||
168 | * @param address address to convert (binary format) | ||
169 | * @param numeric should (IP) addresses be displayed in numeric form | ||
170 | * (otherwise do reverse DNS lookup) | ||
171 | * @param timeout how long is the lookup allowed to take at most | ||
172 | * @param aluc function to call with the results | ||
173 | * @param aluc_cls closure for @a aluc | ||
174 | * @return handle to cancel the operation, NULL on error | ||
175 | */ | ||
176 | struct GNUNET_TRANSPORT_AddressToStringContext * | ||
177 | GNUNET_TRANSPORT_address_to_string (const struct | ||
178 | GNUNET_CONFIGURATION_Handle *cfg, | ||
179 | const struct GNUNET_HELLO_Address *address, | ||
180 | int numeric, | ||
181 | struct GNUNET_TIME_Relative timeout, | ||
182 | GNUNET_TRANSPORT_AddressToStringCallback | ||
183 | aluc, | ||
184 | void *aluc_cls) | ||
185 | { | ||
186 | struct GNUNET_TRANSPORT_AddressToStringContext *alc | ||
187 | = GNUNET_new (struct GNUNET_TRANSPORT_AddressToStringContext); | ||
188 | struct GNUNET_MQ_MessageHandler handlers[] = { | ||
189 | GNUNET_MQ_hd_var_size (reply, | ||
190 | GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_TO_STRING_REPLY, | ||
191 | struct AddressToStringResultMessage, | ||
192 | alc), | ||
193 | GNUNET_MQ_handler_end () | ||
194 | }; | ||
195 | size_t alen; | ||
196 | size_t slen; | ||
197 | struct AddressLookupMessage *msg; | ||
198 | struct GNUNET_MQ_Envelope *env; | ||
199 | char *addrbuf; | ||
200 | |||
201 | alen = address->address_length; | ||
202 | slen = strlen (address->transport_name) + 1; | ||
203 | if ((alen + slen >= GNUNET_MAX_MESSAGE_SIZE | ||
204 | - sizeof(struct AddressLookupMessage)) || | ||
205 | (alen >= GNUNET_MAX_MESSAGE_SIZE) || | ||
206 | (slen >= GNUNET_MAX_MESSAGE_SIZE)) | ||
207 | { | ||
208 | GNUNET_break (0); | ||
209 | GNUNET_free (alc); | ||
210 | return NULL; | ||
211 | } | ||
212 | alc->cb = aluc; | ||
213 | alc->cb_cls = aluc_cls; | ||
214 | alc->mq = GNUNET_CLIENT_connect (cfg, | ||
215 | "transport", | ||
216 | handlers, | ||
217 | &mq_error_handler, | ||
218 | alc); | ||
219 | if (NULL == alc->mq) | ||
220 | { | ||
221 | GNUNET_break (0); | ||
222 | GNUNET_free (alc); | ||
223 | return NULL; | ||
224 | } | ||
225 | GNUNET_log (GNUNET_ERROR_TYPE_INFO, | ||
226 | "Client tries to resolve for peer `%s' address plugin %s len %u\n", | ||
227 | GNUNET_i2s (&address->peer), | ||
228 | address->transport_name, | ||
229 | (unsigned int) address->address_length); | ||
230 | env = GNUNET_MQ_msg_extra (msg, | ||
231 | alen + slen, | ||
232 | GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_TO_STRING); | ||
233 | msg->numeric_only = htons ((int16_t) numeric); | ||
234 | msg->addrlen = htons ((uint16_t) alen); | ||
235 | msg->timeout = GNUNET_TIME_relative_hton (timeout); | ||
236 | addrbuf = (char *) &msg[1]; | ||
237 | GNUNET_memcpy (addrbuf, | ||
238 | address->address, | ||
239 | alen); | ||
240 | GNUNET_memcpy (&addrbuf[alen], | ||
241 | address->transport_name, | ||
242 | slen); | ||
243 | GNUNET_MQ_send (alc->mq, | ||
244 | env); | ||
245 | return alc; | ||
246 | } | ||
247 | |||
248 | |||
249 | /** | ||
250 | * Cancel request for address conversion. | ||
251 | * | ||
252 | * @param alc the context handle | ||
253 | */ | ||
254 | void | ||
255 | GNUNET_TRANSPORT_address_to_string_cancel (struct | ||
256 | GNUNET_TRANSPORT_AddressToStringContext | ||
257 | *alc) | ||
258 | { | ||
259 | GNUNET_MQ_destroy (alc->mq); | ||
260 | GNUNET_free (alc); | ||
261 | } | ||
262 | |||
263 | |||
264 | /* end of transport_api_address_to_string.c */ | ||