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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
42 * Handle to a client that is connected to a service.
44 struct GNUNET_SERVICE_Client
47 * Task that warns about missing calls to
48 * #GNUNET_SERVICE_client_continue().
50 struct GNUNET_SCHEDULER_Task *warn_task;
56 * Creates the "main" function for a GNUnet service. You
57 * should almost always use the #GNUNET_SERVICE_MAIN macro
58 * instead of calling this function directly (except
59 * for ARM, which should call this function directly).
61 * The function will launch the service with the name @a service_name
62 * using the @a service_options to configure its shutdown
63 * behavior. Once the service is ready, the @a init_cb will be called
64 * for service-specific initialization. @a init_cb will be given the
65 * service handler which can be used to control the service's
66 * availability. When clients connect or disconnect, the respective
67 * @a connect_cb or @a disconnect_cb functions will be called. For
68 * messages received from the clients, the respective @a handlers will
69 * be invoked; for the closure of the handlers we use the return value
70 * from the @a connect_cb invocation of the respective client.
72 * Each handler MUST call #GNUNET_SERVICE_client_continue() after each
73 * message to receive further messages from this client. If
74 * #GNUNET_SERVICE_client_continue() is not called within a short
75 * time, a warning will be logged. If delays are expected, services
76 * should call #GNUNET_SERVICE_client_disable_continue_warning() to
77 * disable the warning.
79 * Clients sending invalid messages (based on @a handlers) will be
80 * dropped. Additionally, clients can be dropped at any time using
81 * #GNUNET_SERVICE_client_drop().
83 * @param argc number of command-line arguments in @a argv
84 * @param argv array of command-line arguments
85 * @param service_name name of the service to run
86 * @param options options controlling shutdown of the service
87 * @param service_init_cb function to call once the service is ready
88 * @param connect_cb function to call whenever a client connects
89 * @param disconnect_cb function to call whenever a client disconnects
90 * @param cls closure argument for @a service_init_cb, @a connect_cb and @a disconnect_cb
91 * @param handlers NULL-terminated array of message handlers for the service,
92 * the closure will be set to the value returned by
93 * the @a connect_cb for the respective connection
94 * @return 0 on success, non-zero on error
97 GNUNET_SERVICE_ruN_ (int argc,
99 const char *service_name,
100 enum GNUNET_SERVICE_Options options,
101 GNUNET_SERVICE_InitCallback service_init_cb,
102 GNUNET_SERVICE_ConnectHandler connect_cb,
103 GNUNET_SERVICE_DisconnectHandler disconnect_cb,
105 const struct GNUNET_MQ_MessageHandler *handlers)
107 GNUNET_break (0); // not implemented
113 * Suspend accepting connections from the listen socket temporarily.
114 * Resume activity using #GNUNET_SERVICE_resume.
116 * @param sh service to stop accepting connections.
119 GNUNET_SERVICE_suspend (struct GNUNET_SERVICE_Handle *sh)
121 GNUNET_break (0); // not implemented
126 * Resume accepting connections from the listen socket.
128 * @param sh service to resume accepting connections.
131 GNUNET_SERVICE_resume (struct GNUNET_SERVICE_Handle *sh)
133 GNUNET_break (0); // not implemented
138 * Continue receiving further messages from the given client.
139 * Must be called after each message received.
141 * @param c the client to continue receiving from
144 GNUNET_SERVICE_client_continue (struct GNUNET_SERVICE_Client *c)
146 GNUNET_break (0); // not implemented
151 * Disable the warning the server issues if a message is not
152 * acknowledged in a timely fashion. Use this call if a client is
153 * intentionally delayed for a while. Only applies to the current
156 * @param c client for which to disable the warning
159 GNUNET_SERVICE_client_disable_continue_warning (struct GNUNET_SERVICE_Client *c)
161 GNUNET_break (NULL != c->warn_task);
162 if (NULL != c->warn_task)
164 GNUNET_SCHEDULER_cancel (c->warn_task);
171 * Ask the server to disconnect from the given client. This is the
172 * same as returning #GNUNET_SYSERR within the check procedure when
173 * handling a message, wexcept that it allows dropping of a client even
174 * when not handling a message from that client. The `disconnect_cb`
175 * will be called on @a c even if the application closes the connection
176 * using this function.
178 * @param c client to disconnect now
181 GNUNET_SERVICE_client_drop (struct GNUNET_SERVICE_Client *c)
183 GNUNET_break (0); // not implemented
188 * Stop the listen socket and get ready to shutdown the server once
189 * only clients marked using #GNUNET_SERVER_client_mark_monitor are
192 * @param sh server to stop listening on
195 GNUNET_SERVICE_stop_listening (struct GNUNET_SERVICE_Handle *sh)
197 GNUNET_break (0); // not implemented
202 * Set the 'monitor' flag on this client. Clients which have been
203 * marked as 'monitors' won't prevent the server from shutting down
204 * once #GNUNET_SERVICE_stop_listening() has been invoked. The idea is
205 * that for "normal" clients we likely want to allow them to process
206 * their requests; however, monitor-clients are likely to 'never'
207 * disconnect during shutdown and thus will not be considered when
208 * determining if the server should continue to exist after
209 * shutdown has been triggered.
211 * @param c client to mark as a monitor
214 GNUNET_SERVICE_client_mark_monitor (struct GNUNET_SERVICE_Client *c)
216 GNUNET_break (0); // not implemented
221 * Set the persist option on this client. Indicates that the
222 * underlying socket or fd should never really be closed. Used for
223 * indicating process death.
225 * @param c client to persist the socket (never to be closed)
228 GNUNET_SERVICE_client_persist (struct GNUNET_SERVICE_Client *c)
230 GNUNET_break (0); // not implemented
235 /* end of service_new.c */