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
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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.
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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
70 * @param rh request handle to user for reply
71 * @param request_length number of bytes in request
72 * @param request udp payload of the DNS request
75 handle_dns_request(void *cls,
76 struct GNUNET_DNS_RequestHandle *rh,
77 size_t request_length,
81 * TODO: parse request for tld
82 * Queue rh and gns handle (or use cls)
83 * How should lookup behave:
84 * - sync and return result or "NX"
85 * - async like dht with iter
86 * Maybe provide both, useful for cli app
88 struct GNUNET_DNSPARSER_Packet *p;
93 p = GNUNET_DNSPARSER_parse (request, request_length);
96 fprintf (stderr, "Received malformed DNS packet, leaving it untouched\n");
97 GNUNET_DNS_request_forward (rh);
102 * Check tld and decide if we or
103 * legacy dns is responsible
105 for (i=0;i<p->num_queries;i++)
107 namelen = strlen(p->queries[i].name);
112 * Move our tld/root to config file
113 * Generate fake DNS reply that replaces .gnunet with .org
115 tail = p->queries[i].name+(namelen-7);
116 if (0 == strcmp(tail, ".gnunet"))
118 /* Do db lookup here. Make dht lookup if necessary */
119 GNUNET_DNS_request_answer(rh, 0 /*length*/, NULL/*reply*/);
123 GNUNET_DNS_request_forward (rh);
131 handle_client_record_lookup(void *cls,
132 struct GNUNET_SERVER_Client *client,
133 const struct GNUNET_MessageHeader *message)
139 handle_client_record_add(void *cls,
140 struct GNUNET_SERVER_Client *client,
141 const struct GNUNET_MessageHeader *message)
146 * Process GNS requests.
149 * @param server the initialized server
150 * @param c configuration to use
153 run (void *cls, struct GNUNET_SERVER_Handle *server,
154 const struct GNUNET_CONFIGURATION_Handle *c)
156 /* The IPC message types */
157 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
158 /* callback, cls, type, size */
159 {&handle_client_record_lookup, NULL, GNUNET_MESSAGE_TYPE_GNS_CLIENT_LOOKUP,
161 /*{&handle_client_record_add, NULL, GNUNET_MESSAGE_TYPE_GNS_CLIENT_ADD,
166 nc = GNUNET_SERVER_notification_context_create (server, 1);
168 /* TODO do some config parsing */
170 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
173 * Do gnunet dns init here
175 dns_handle = GNUNET_DNS_connect(c,
176 GNUNET_DNS_FLAG_PRE_RESOLUTION,
177 &handle_dns_request, /* rh */
179 GNUNET_SERVER_add_handlers (server, handlers);
181 * Esp the lookup would require to keep track of the clients' context
183 * GNUNET_SERVER_disconnect_notify (server, &client_disconnect, NULL);
189 * The main function for the GNS service.
191 * @param argc number of arguments from the command line
192 * @param argv command line arguments
193 * @return 0 ok, 1 on error
196 main (int argc, char *const *argv)
202 GNUNET_SERVICE_run (argc, argv, "gns", GNUNET_SERVICE_OPTION_NONE, &run,
207 /* end of gnunet-service-gns.c */