GNUnet  0.11.x
gnunet-service-testbed-logger.c
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1 /*
2  This file is part of GNUnet.
3  Copyright (C) 2008--2013 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 
27 #include "platform.h"
28 #include "gnunet_util_lib.h"
29 
33 #define LOG(type, ...) \
34  GNUNET_log (type, __VA_ARGS__)
35 
39 #define LOG_DEBUG(...) \
40  LOG (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
41 
46 
50 static unsigned int nconn;
51 
55 static int in_shutdown;
56 
57 
65 static int
66 check_log_msg (void *cls,
67  const struct GNUNET_MessageHeader *msg)
68 {
69  return GNUNET_OK;
70 }
71 
72 
79 static void
80 handle_log_msg (void *cls,
81  const struct GNUNET_MessageHeader *msg)
82 {
83  struct GNUNET_SERVICE_Client *client = cls;
84  uint16_t ms;
85 
86  ms = ntohs (msg->size) - sizeof(struct GNUNET_MessageHeader);
87  GNUNET_BIO_write (bio,
88  "testbed-logger-handle-log-msg",
89  &msg[1],
90  ms);
92 }
93 
94 
100 static void
101 shutdown_task (void *cls)
102 {
104  if (0 != nconn)
105  {
106  /* Delay shutdown if there are active connections */
108  NULL);
109  return;
110  }
112  GNUNET_BIO_write_close (bio, NULL));
113 }
114 
115 
124 static void *
125 client_connect_cb (void *cls,
126  struct GNUNET_SERVICE_Client *c,
127  struct GNUNET_MQ_Handle *mq)
128 {
129  /* FIXME: is this really what we want here? */
131  nconn++;
132  return c;
133 }
134 
135 
143 static void
145  struct GNUNET_SERVICE_Client *c,
146  void *internal_cls)
147 {
148  nconn--;
149  if (GNUNET_YES == in_shutdown)
151  GNUNET_assert (c == internal_cls);
152 }
153 
154 
162 static void
163 logger_run (void *cls,
164  const struct GNUNET_CONFIGURATION_Handle *cfg,
166 {
167  char *dir;
168  char *fn;
169  char *hname;
170  size_t hname_len;
171  pid_t pid;
172 
173  if (GNUNET_OK !=
175  "TESTBED-LOGGER",
176  "DIR",
177  &dir))
178  {
180  "TESTBED-LOGGER",
181  "DIR");
183  return;
184  }
185  pid = getpid ();
186  hname_len = GNUNET_OS_get_hostname_max_length ();
187  hname = GNUNET_malloc (hname_len);
188  if (0 != gethostname (hname,
189  hname_len))
190  {
192  "Cannot get hostname. Exiting\n");
193  GNUNET_free (hname);
194  GNUNET_free (dir);
196  return;
197  }
198  GNUNET_asprintf (&fn,
199  "%s/%.*s_%jd.dat",
200  dir,
201  (int) hname_len,
202  hname,
203  (intmax_t) pid);
204  GNUNET_free (hname);
205  GNUNET_free (dir);
206  if (NULL == (bio = GNUNET_BIO_write_open_file (fn)))
207  {
208  GNUNET_free (fn);
210  return;
211  }
212  GNUNET_free (fn);
214  NULL);
215  LOG_DEBUG ("TESTBED-LOGGER startup complete\n");
216 }
217 
218 
223  ("testbed-logger",
225  &logger_run,
228  NULL,
229  GNUNET_MQ_hd_var_size (log_msg,
231  struct GNUNET_MessageHeader,
232  NULL),
234 
235 
236 /* end of gnunet-service-testbed-logger.c */
static char * dir
Set to the directory where runtime files are stored.
Definition: gnunet-arm.c:89
static struct GNUNET_SERVICE_Handle * service
Handle to our service instance.
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
static const struct GNUNET_CONFIGURATION_Handle * cfg
Configuration we are using.
Definition: gnunet-abd.c:36
Handle to a service.
Definition: service.c:116
static int check_log_msg(void *cls, const struct GNUNET_MessageHeader *msg)
Check GNUNET_MESSAGE_TYPE_TESTBED_LOGGER_MSG messages.
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_shutdown(GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run on shutdown, that is when a CTRL-C signal is received, or when GNUNET_SCHEDULER_shutdown() is being invoked.
Definition: scheduler.c:1331
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define LOG_DEBUG(...)
Debug logging shorthand.
GNUNET_SERVICE_MAIN("testbed-logger", GNUNET_SERVICE_OPTION_NONE, &logger_run, &client_connect_cb, &client_disconnect_cb, NULL, GNUNET_MQ_hd_var_size(log_msg, GNUNET_MESSAGE_TYPE_TESTBED_LOGGER_MSG, struct GNUNET_MessageHeader, NULL), GNUNET_MQ_handler_end())
Define "main" method using service macro.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
static void shutdown_task(void *cls)
Task to clean up and shutdown nicely.
void GNUNET_SCHEDULER_shutdown(void)
Request the shutdown of a scheduler.
Definition: scheduler.c:531
static void client_disconnect_cb(void *cls, struct GNUNET_SERVICE_Client *c, void *internal_cls)
Callback called when a client disconnected from the service.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
Handle to a client that is connected to a service.
Definition: service.c:250
void GNUNET_log_config_missing(enum GNUNET_ErrorType kind, const char *section, const char *option)
Log error message about missing configuration option.
#define GNUNET_OS_get_hostname_max_length()
Get maximum string length returned by gethostname()
#define GNUNET_MQ_hd_var_size(name, code, str, ctx)
static char * fn
Filename of the unique file.
#define LOG(type,...)
Generic logging shorthand.
struct GNUNET_BIO_WriteHandle * bio
Handle for buffered writing.
Handle for buffered writing.
Definition: bio.c:516
int int GNUNET_asprintf(char **buf, const char *format,...) __attribute__((format(printf
Like asprintf, just portable.
struct GNUNET_BIO_WriteHandle * GNUNET_BIO_write_open_file(const char *fn)
Open a file for writing.
Definition: bio.c:559
int GNUNET_BIO_write_close(struct GNUNET_BIO_WriteHandle *h, char **emsg)
Close an IO handle.
Definition: bio.c:608
static void * client_connect_cb(void *cls, struct GNUNET_SERVICE_Client *c, struct GNUNET_MQ_Handle *mq)
Callback called when a client connects to the service.
Handle to a message queue.
Definition: mq.c:85
configuration data
Definition: configuration.c:84
struct GNUNET_MQ_Handle * mq
Definition: 003.c:5
int GNUNET_CONFIGURATION_get_value_filename(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, char **value)
Get a configuration value that should be the name of a file or directory.
Header for all communications.
static struct GNUNET_PeerIdentity pid
Identity of the peer we transmit to / connect to.
static int in_shutdown
Are we shutting down?
static void handle_log_msg(void *cls, const struct GNUNET_MessageHeader *msg)
Message handler for GNUNET_MESSAGE_TYPE_TESTBED_LOGGER_MSG messages.
static void logger_run(void *cls, const struct GNUNET_CONFIGURATION_Handle *cfg, struct GNUNET_SERVICE_Handle *service)
Testbed setup.
int GNUNET_BIO_write(struct GNUNET_BIO_WriteHandle *h, const char *what, const void *buffer, size_t n)
Write a buffer to a handle.
Definition: bio.c:795
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2244
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
#define GNUNET_malloc(size)
Wrapper around malloc.
void GNUNET_SERVICE_client_persist(struct GNUNET_SERVICE_Client *c)
Set the persist option on this client.
Definition: service.c:2425
#define GNUNET_free(ptr)
Wrapper around free.
static unsigned int nconn
The number of connections we have.
#define GNUNET_MESSAGE_TYPE_TESTBED_LOGGER_MSG
Message for TESTBED LOGGER.