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22 * @file util/service_new.c
23 * @brief functions related to starting services (redesign)
24 * @author Christian Grothoff
27 #include "gnunet_util_lib.h"
28 #include "gnunet_protocols.h"
29 #include "gnunet_constants.h"
30 #include "gnunet_resolver_service.h"
34 * Handle to a service.
36 struct GNUNET_SERVICE_Handle
41 const struct GNUNET_CONFIGURATION_Handle *cfg;
44 * Name of our service.
46 const char *service_name;
49 * Main service-specific task to run.
51 GNUNET_SERVICE_Main task;
54 * Closure for @e task.
59 * IPv4 addresses that are not allowed to connect.
61 struct GNUNET_STRINGS_IPv4NetworkPolicy *v4_denied;
64 * IPv6 addresses that are not allowed to connect.
66 struct GNUNET_STRINGS_IPv6NetworkPolicy *v6_denied;
69 * IPv4 addresses that are allowed to connect (if not
70 * set, all are allowed).
72 struct GNUNET_STRINGS_IPv4NetworkPolicy *v4_allowed;
75 * IPv6 addresses that are allowed to connect (if not
76 * set, all are allowed).
78 struct GNUNET_STRINGS_IPv6NetworkPolicy *v6_allowed;
81 * Do we require a matching UID for UNIX domain socket connections?
82 * #GNUNET_NO means that the UID does not have to match (however,
83 * @e match_gid may still impose other access control checks).
88 * Do we require a matching GID for UNIX domain socket connections?
89 * Ignored if @e match_uid is #GNUNET_YES. Note that this is about
90 * checking that the client's UID is in our group OR that the
91 * client's GID is our GID. If both "match_gid" and @e match_uid are
92 * #GNUNET_NO, all users on the local system have access.
99 enum GNUNET_SERVICE_Options options;
105 * Handle to a client that is connected to a service.
107 struct GNUNET_SERVICE_Client
111 * Server that this client belongs to.
113 struct GNUNET_SERVER_Handle *server;
116 * Task that warns about missing calls to
117 * #GNUNET_SERVICE_client_continue().
119 struct GNUNET_SCHEDULER_Task *warn_task;
122 * User context value, value returned from
123 * the connect callback.
128 * Persist the file handle for this client no matter what happens,
129 * force the OS to close once the process actually dies. Should only
130 * be used in special cases!
135 * Is this client a 'monitor' client that should not be counted
136 * when deciding on destroying the server during soft shutdown?
137 * (see also #GNUNET_SERVICE_start)
142 * Type of last message processed (for warn_no_receive_done).
149 * Creates the "main" function for a GNUnet service. You
150 * should almost always use the #GNUNET_SERVICE_MAIN macro
151 * instead of calling this function directly (except
152 * for ARM, which should call this function directly).
154 * The function will launch the service with the name @a service_name
155 * using the @a service_options to configure its shutdown
156 * behavior. Once the service is ready, the @a init_cb will be called
157 * for service-specific initialization. @a init_cb will be given the
158 * service handler which can be used to control the service's
159 * availability. When clients connect or disconnect, the respective
160 * @a connect_cb or @a disconnect_cb functions will be called. For
161 * messages received from the clients, the respective @a handlers will
162 * be invoked; for the closure of the handlers we use the return value
163 * from the @a connect_cb invocation of the respective client.
165 * Each handler MUST call #GNUNET_SERVICE_client_continue() after each
166 * message to receive further messages from this client. If
167 * #GNUNET_SERVICE_client_continue() is not called within a short
168 * time, a warning will be logged. If delays are expected, services
169 * should call #GNUNET_SERVICE_client_disable_continue_warning() to
170 * disable the warning.
172 * Clients sending invalid messages (based on @a handlers) will be
173 * dropped. Additionally, clients can be dropped at any time using
174 * #GNUNET_SERVICE_client_drop().
176 * @param argc number of command-line arguments in @a argv
177 * @param argv array of command-line arguments
178 * @param service_name name of the service to run
179 * @param options options controlling shutdown of the service
180 * @param service_init_cb function to call once the service is ready
181 * @param connect_cb function to call whenever a client connects
182 * @param disconnect_cb function to call whenever a client disconnects
183 * @param cls closure argument for @a service_init_cb, @a connect_cb and @a disconnect_cb
184 * @param handlers NULL-terminated array of message handlers for the service,
185 * the closure will be set to the value returned by
186 * the @a connect_cb for the respective connection
187 * @return 0 on success, non-zero on error
190 GNUNET_SERVICE_ruN_ (int argc,
192 const char *service_name,
193 enum GNUNET_SERVICE_Options options,
194 GNUNET_SERVICE_InitCallback service_init_cb,
195 GNUNET_SERVICE_ConnectHandler connect_cb,
196 GNUNET_SERVICE_DisconnectHandler disconnect_cb,
198 const struct GNUNET_MQ_MessageHandler *handlers)
200 GNUNET_break (0); // not implemented
206 * Suspend accepting connections from the listen socket temporarily.
207 * Resume activity using #GNUNET_SERVICE_resume.
209 * @param sh service to stop accepting connections.
212 GNUNET_SERVICE_suspend (struct GNUNET_SERVICE_Handle *sh)
214 GNUNET_break (0); // not implemented
219 * Resume accepting connections from the listen socket.
221 * @param sh service to resume accepting connections.
224 GNUNET_SERVICE_resume (struct GNUNET_SERVICE_Handle *sh)
226 GNUNET_break (0); // not implemented
231 * Continue receiving further messages from the given client.
232 * Must be called after each message received.
234 * @param c the client to continue receiving from
237 GNUNET_SERVICE_client_continue (struct GNUNET_SERVICE_Client *c)
239 GNUNET_break (0); // not implemented
244 * Disable the warning the server issues if a message is not
245 * acknowledged in a timely fashion. Use this call if a client is
246 * intentionally delayed for a while. Only applies to the current
249 * @param c client for which to disable the warning
252 GNUNET_SERVICE_client_disable_continue_warning (struct GNUNET_SERVICE_Client *c)
254 GNUNET_break (NULL != c->warn_task);
255 if (NULL != c->warn_task)
257 GNUNET_SCHEDULER_cancel (c->warn_task);
264 * Ask the server to disconnect from the given client. This is the
265 * same as returning #GNUNET_SYSERR within the check procedure when
266 * handling a message, wexcept that it allows dropping of a client even
267 * when not handling a message from that client. The `disconnect_cb`
268 * will be called on @a c even if the application closes the connection
269 * using this function.
271 * @param c client to disconnect now
274 GNUNET_SERVICE_client_drop (struct GNUNET_SERVICE_Client *c)
276 GNUNET_break (0); // not implemented
281 * Stop the listen socket and get ready to shutdown the server once
282 * only clients marked using #GNUNET_SERVER_client_mark_monitor are
285 * @param sh server to stop listening on
288 GNUNET_SERVICE_stop_listening (struct GNUNET_SERVICE_Handle *sh)
290 GNUNET_break (0); // not implemented
295 * Set the 'monitor' flag on this client. Clients which have been
296 * marked as 'monitors' won't prevent the server from shutting down
297 * once #GNUNET_SERVICE_stop_listening() has been invoked. The idea is
298 * that for "normal" clients we likely want to allow them to process
299 * their requests; however, monitor-clients are likely to 'never'
300 * disconnect during shutdown and thus will not be considered when
301 * determining if the server should continue to exist after
302 * shutdown has been triggered.
304 * @param c client to mark as a monitor
307 GNUNET_SERVICE_client_mark_monitor (struct GNUNET_SERVICE_Client *c)
309 GNUNET_break (0); // not implemented
314 * Set the persist option on this client. Indicates that the
315 * underlying socket or fd should never really be closed. Used for
316 * indicating process death.
318 * @param c client to persist the socket (never to be closed)
321 GNUNET_SERVICE_client_persist (struct GNUNET_SERVICE_Client *c)
323 GNUNET_break (0); // not implemented
328 /* end of service_new.c */