2 This file is part of GNUnet.
3 (C) 2009, 2010, 2011 Christian Grothoff (and other contributing authors)
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.
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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.
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,
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22 * @file gns/gnunet-service-gns.c
23 * @brief GNUnet GNS service
24 * @author Martin Schanzenbach
27 #include "gnunet_util_lib.h"
28 #include "gnunet_transport_service.h"
29 #include "gnunet_dns_service.h"
30 #include "gnunet_dnsparser_lib.h"
31 #include "gnunet_gns_service.h"
35 /* TODO into gnunet_protocols */
36 #define GNUNET_MESSAGE_TYPE_GNS_CLIENT_LOOKUP 23
37 #define GNUNET_MESSAGE_TYPE_GNS_CLIENT_RESULT 24
40 * Our handle to the DNS handler library
42 struct GNUNET_DNS_Handle *dns_handle;
45 * The configuration the GNS service is running with
47 const struct GNUNET_CONFIGURATION_Handle *GNS_cfg;
50 * Our notification context.
52 static struct GNUNET_SERVER_NotificationContext *nc;
55 * Task run during shutdown.
61 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
63 GNUNET_DNS_disconnect(dns_handle);
67 * The DNS request handler
68 * Is this supposed to happen here in the service (config option)
69 * or in an app that interfaces with the GNS API?
72 * @param rh request handle to user for reply
73 * @param request_length number of bytes in request
74 * @param request udp payload of the DNS request
77 handle_dns_request(void *cls,
78 struct GNUNET_DNS_RequestHandle *rh,
79 size_t request_length,
83 * parse request for tld
85 struct GNUNET_DNSPARSER_Packet *p;
90 p = GNUNET_DNSPARSER_parse (request, request_length);
93 fprintf (stderr, "Received malformed DNS packet, leaving it untouched\n");
94 GNUNET_DNS_request_forward (rh);
99 * Check tld and decide if we or
100 * legacy dns is responsible
102 for (i=0;i<p->num_queries;i++)
104 namelen = strlen(p->queries[i].name);
109 * Move our tld/root to config file
110 * Generate fake DNS reply that replaces .gnunet with .org
112 tail = p->queries[i].name+(namelen-7);
113 if (0 == strcmp(tail, ".gnunet"))
115 /* Do db lookup here. Make dht lookup if necessary */
116 GNUNET_DNS_request_answer(rh, 0 /*length*/, NULL/*reply*/);
120 GNUNET_DNS_request_forward (rh);
128 handle_client_record_lookup(void *cls,
129 struct GNUNET_SERVER_Client *client,
130 const struct GNUNET_MessageHeader *message)
135 * Process GNS requests.
138 * @param server the initialized server
139 * @param c configuration to use
142 run (void *cls, struct GNUNET_SERVER_Handle *server,
143 const struct GNUNET_CONFIGURATION_Handle *c)
145 /* The IPC message types */
146 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
147 /* callback, cls, type, size */
148 {&handle_client_record_lookup, NULL, GNUNET_MESSAGE_TYPE_GNS_CLIENT_LOOKUP,
153 nc = GNUNET_SERVER_notification_context_create (server, 1);
155 /* TODO do some config parsing */
157 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
160 * Do gnunet dns init here
162 dns_handle = GNUNET_DNS_connect(c,
163 GNUNET_DNS_FLAG_PRE_RESOLUTION,
164 &handle_dns_request, /* rh */
166 GNUNET_SERVER_add_handlers (server, handlers);
168 * Esp the lookup would require to keep track of the clients' context
170 * GNUNET_SERVER_disconnect_notify (server, &client_disconnect, NULL);
176 * The main function for the GNS service.
178 * @param argc number of arguments from the command line
179 * @param argv command line arguments
180 * @return 0 ok, 1 on error
183 main (int argc, char *const *argv)
189 GNUNET_SERVICE_run (argc, argv, "gns", GNUNET_SERVICE_OPTION_NONE, &run,
194 /* end of gnunet-service-gns.c */