GNUnet  0.11.x
gnunet-messenger.c
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1 /*
2  This file is part of GNUnet.
3  Copyright (C) 2020--2021 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  */
26 #include <stdio.h>
27 
28 #include "platform.h"
29 #include "gnunet_util_lib.h"
31 
33 
44 void
45 on_message (void *cls,
46  struct GNUNET_MESSENGER_Room *room,
47  const struct GNUNET_MESSENGER_Contact *sender,
48  const struct GNUNET_MESSENGER_Message *message,
49  const struct GNUNET_HashCode *hash,
51 {
52  const char *sender_name = GNUNET_MESSENGER_contact_get_name (sender);
53 
54  if (!sender_name)
55  sender_name = "anonymous";
56 
57  printf ("[%s] ", GNUNET_sh2s(&(message->header.sender_id)));
58 
60  printf ("*");
61 
62  switch (message->header.kind)
63  {
65  {
66  printf ("* '%s' joined the room!\n", sender_name);
67  break;
68  }
70  {
71  printf ("* '%s' gets renamed to '%s'\n", sender_name, message->body.name.name);
72  break;
73  }
75  {
76  printf ("* '%s' leaves the room!\n", sender_name);
77  break;
78  }
80  {
81  printf ("* '%s' opened the room on: %s\n", sender_name, GNUNET_i2s_full (&(message->body.peer.peer)));
82  break;
83  }
85  {
86  if (flags & GNUNET_MESSENGER_FLAG_SENT)
87  printf (">");
88  else
89  printf ("<");
90 
91  printf (" '%s' says: \"%s\"\n", sender_name, message->body.text.text);
92  break;
93  }
94  default:
95  {
96  printf ("~ message: %s\n", GNUNET_MESSENGER_name_of_kind(message->header.kind));
97  break;
98  }
99  }
100 }
101 
103 
109 static void
110 shutdown_hook (void *cls)
111 {
112  struct GNUNET_MESSENGER_Room *room = cls;
113 
114  if (read_task)
116 
117  if (room)
119 
120  if (messenger)
122 }
123 
124 static void
125 listen_stdio (void *cls);
126 
127 #define MAX_BUFFER_SIZE 60000
128 
129 static int
131  struct GNUNET_MESSENGER_Room *room,
132  const struct GNUNET_MESSENGER_Contact *contact)
133 {
134  struct GNUNET_MESSENGER_Message *message = cls;
135 
137  GNUNET_MESSENGER_send_message (room, message, contact);
138 
139  return GNUNET_YES;
140 }
141 
143 
149 static void
150 read_stdio (void *cls)
151 {
152  read_task = NULL;
153 
154  char buffer[MAX_BUFFER_SIZE];
155  ssize_t length;
156 
157  length = read (0, buffer, MAX_BUFFER_SIZE);
158 
159  if ((length <= 0) || (length >= MAX_BUFFER_SIZE))
160  {
162  return;
163  }
164 
165  if (buffer[length - 1] == '\n')
166  buffer[length - 1] = '\0';
167  else
168  buffer[length] = '\0';
169 
170  struct GNUNET_MESSENGER_Room *room = cls;
171 
172  struct GNUNET_MESSENGER_Message message;
174  message.body.text.text = buffer;
175 
176  if (GNUNET_YES == private_mode)
178  else
179  GNUNET_MESSENGER_send_message (room, &message, NULL);
180 
182 }
183 
189 static void
190 listen_stdio (void *cls)
191 {
192  read_task = NULL;
193 
195 
197 
200  NULL, &read_stdio, cls);
201 
203 }
204 
210 static void
211 idle (void *cls)
212 {
213  struct GNUNET_MESSENGER_Room *room = cls;
214 
215  printf ("* You joined the room.\n");
216 
218 }
219 
220 char *door_id;
221 char *ego_name;
222 char *room_key;
223 
225 
232 static void
233 on_identity (void *cls,
235 {
236  struct GNUNET_HashCode key;
237  memset (&key, 0, sizeof(key));
238 
239  if (room_key)
240  GNUNET_CRYPTO_hash (room_key, strlen (room_key), &key);
241 
242  struct GNUNET_PeerIdentity door_peer;
243  struct GNUNET_PeerIdentity *door = NULL;
244 
245  if ((door_id) &&
247  door = &door_peer;
248 
249  const char *name = GNUNET_MESSENGER_get_name (handle);
250 
251  if (!name)
252  name = "anonymous";
253 
254  printf ("* Welcome to the messenger, '%s'!\n", name);
255 
256  struct GNUNET_MESSENGER_Room *room;
257 
258  if (door)
259  {
260  printf ("* You try to entry a room...\n");
261 
262  room = GNUNET_MESSENGER_enter_room (messenger, door, &key);
263  }
264  else
265  {
266  printf ("* You try to open a room...\n");
267 
269  }
270 
272 
274 
275  if (!room)
277  else
278  {
279  struct GNUNET_MESSENGER_Message message;
281  message.body.name.name = GNUNET_strdup(name);
282 
283  GNUNET_MESSENGER_send_message (room, &message, NULL);
284  GNUNET_free(message.body.name.name);
285 
287  room);
288  }
289 }
290 
299 static void
300 run (void *cls,
301  char *const*args,
302  const char *cfgfile,
303  const struct GNUNET_CONFIGURATION_Handle *cfg)
304 {
306 
308 }
309 
317 int
318 main (int argc,
319  char **argv)
320 {
321  const char *description = "Open and connect to rooms using the MESSENGER to chat.";
322 
324  {
325  GNUNET_GETOPT_option_string ('d', "door", "PEERIDENTITY", "peer identity to entry into the room", &door_id),
326  GNUNET_GETOPT_option_string ('e', "ego", "IDENTITY", "identity to use for messaging", &ego_name),
327  GNUNET_GETOPT_option_string ('r', "room", "ROOMKEY", "key of the room to connect to", &room_key),
328  GNUNET_GETOPT_option_flag ('p', "private", "flag to enable private mode", &private_mode),
330  };
331 
332  return (GNUNET_OK == GNUNET_PROGRAM_run (argc, argv, "gnunet-messenger\0", gettext_noop(description), options, &run,
333  NULL) ? EXIT_SUCCESS : EXIT_FAILURE);
334 }
struct GNUNET_GETOPT_CommandLineOption GNUNET_GETOPT_OPTION_END
Definition: 002.c:13
struct GNUNET_GETOPT_CommandLineOption options[]
Definition: 002.c:5
#define gettext_noop(String)
Definition: gettext.h:69
static const struct GNUNET_CONFIGURATION_Handle * cfg
Configuration we are using.
Definition: gnunet-abd.c:36
struct GNUNET_HashCode key
The key used in the DHT.
static struct GNUNET_DNS_Handle * handle
Handle to transport service.
static void on_identity(void *cls, struct GNUNET_MESSENGER_Handle *handle)
Function called when an identity is retrieved.
static void listen_stdio(void *cls)
Wait for input on STDIO and send it out over the ch.
int main(int argc, char **argv)
The main function to obtain messenger information.
static void idle(void *cls)
Initial task to startup application.
void on_message(void *cls, struct GNUNET_MESSENGER_Room *room, const struct GNUNET_MESSENGER_Contact *sender, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash, enum GNUNET_MESSENGER_MessageFlags flags)
Function called whenever a message is received or sent.
static void read_stdio(void *cls)
Task run in stdio mode, after some data is available at stdin.
struct GNUNET_MESSENGER_Handle * messenger
char * door_id
char * ego_name
struct GNUNET_SCHEDULER_Task * read_task
int private_mode
static int iterate_send_private_message(void *cls, struct GNUNET_MESSENGER_Room *room, const struct GNUNET_MESSENGER_Contact *contact)
struct GNUNET_SCHEDULER_Task * shutdown_task
char * room_key
static void run(void *cls, char *const *args, const char *cfgfile, const struct GNUNET_CONFIGURATION_Handle *cfg)
Main function that will be run by the scheduler.
#define MAX_BUFFER_SIZE
static void shutdown_hook(void *cls)
Task to shut down this application.
@ GNUNET_SCHEDULER_PRIORITY_IDLE
Run when otherwise idle.
@ GNUNET_SCHEDULER_PRIORITY_DEFAULT
Run with the default priority (normal P2P operations).
@ GNUNET_OK
Definition: gnunet_common.h:95
@ GNUNET_YES
Definition: gnunet_common.h:97
enum GNUNET_GenericReturnValue GNUNET_CRYPTO_eddsa_public_key_from_string(const char *enc, size_t enclen, struct GNUNET_CRYPTO_EddsaPublicKey *pub)
Convert a string representing a public key to a public key.
Definition: crypto_ecc.c:357
struct GNUNET_GETOPT_CommandLineOption GNUNET_GETOPT_option_flag(char shortName, const char *name, const char *description, int *val)
Allow user to specify a flag (which internally means setting an integer to 1/GNUNET_YES/GNUNET_OK.
struct GNUNET_GETOPT_CommandLineOption GNUNET_GETOPT_option_string(char shortName, const char *name, const char *argumentHelp, const char *description, char **str)
Allow user to specify a string.
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:41
const char * GNUNET_sh2s(const struct GNUNET_ShortHashCode *shc)
Convert a short hash value to a string (for printing debug messages).
const char * GNUNET_i2s_full(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
#define GNUNET_strdup(a)
Wrapper around GNUNET_xstrdup_.
#define GNUNET_free(ptr)
Wrapper around free.
const char * GNUNET_MESSENGER_get_name(const struct GNUNET_MESSENGER_Handle *handle)
Get the name (if specified, otherwise NULL) used by the messenger.
struct GNUNET_MESSENGER_Room * GNUNET_MESSENGER_enter_room(struct GNUNET_MESSENGER_Handle *handle, const struct GNUNET_PeerIdentity *door, const struct GNUNET_HashCode *key)
Enter a room to send and receive messages through a door opened using GNUNET_MESSENGER_open_room.
int GNUNET_MESSENGER_iterate_members(struct GNUNET_MESSENGER_Room *room, GNUNET_MESSENGER_MemberCallback callback, void *cls)
Iterates through all members of a given room and calls a selected callback for each of them with a pr...
struct GNUNET_MESSENGER_Room * GNUNET_MESSENGER_open_room(struct GNUNET_MESSENGER_Handle *handle, const struct GNUNET_HashCode *key)
Open a room to send and receive messages.
GNUNET_MESSENGER_MessageFlags
Enum for the different supported flags used by message handling Compatible flags can be OR'ed togethe...
const struct GNUNET_IDENTITY_PublicKey * GNUNET_MESSENGER_contact_get_key(const struct GNUNET_MESSENGER_Contact *contact)
Get the public key used by the contact or NULL if the anonymous key was used.
struct GNUNET_MESSENGER_Handle * GNUNET_MESSENGER_connect(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *name, GNUNET_MESSENGER_IdentityCallback identity_callback, void *identity_cls, GNUNET_MESSENGER_MessageCallback msg_callback, void *msg_cls)
Set up a handle for the messenger related functions and connects to all necessary services.
const char * GNUNET_MESSENGER_contact_get_name(const struct GNUNET_MESSENGER_Contact *contact)
Get the name used by the contact.
const char * GNUNET_MESSENGER_name_of_kind(enum GNUNET_MESSENGER_MessageKind kind)
Get the name of a message kind.
Definition: messenger_api.c:35
void GNUNET_MESSENGER_disconnect(struct GNUNET_MESSENGER_Handle *handle)
Disconnect all of the messengers used services and clears up its used memory.
void GNUNET_MESSENGER_close_room(struct GNUNET_MESSENGER_Room *room)
Close a room which was entered, opened or both in various order and variety.
void GNUNET_MESSENGER_send_message(struct GNUNET_MESSENGER_Room *room, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_MESSENGER_Contact *contact)
Send a message into a room.
@ GNUNET_MESSENGER_KIND_NAME
The name kind.
@ GNUNET_MESSENGER_KIND_LEAVE
The leave kind.
@ GNUNET_MESSENGER_KIND_PEER
The peer kind.
@ GNUNET_MESSENGER_KIND_TEXT
The text kind.
@ GNUNET_MESSENGER_KIND_JOIN
The join kind.
@ GNUNET_MESSENGER_FLAG_PRIVATE
The private flag.
@ GNUNET_MESSENGER_FLAG_SENT
The sent flag.
struct GNUNET_NETWORK_FDSet * GNUNET_NETWORK_fdset_create(void)
Creates an fd set.
Definition: network.c:1245
void GNUNET_NETWORK_fdset_destroy(struct GNUNET_NETWORK_FDSet *fds)
Releases the associated memory of an fd set.
Definition: network.c:1261
void GNUNET_NETWORK_fdset_set_native(struct GNUNET_NETWORK_FDSet *to, int nfd)
Set a native fd in a set.
Definition: network.c:1132
enum GNUNET_GenericReturnValue GNUNET_PROGRAM_run(int argc, char *const *argv, const char *binaryName, const char *binaryHelp, const struct GNUNET_GETOPT_CommandLineOption *options, GNUNET_PROGRAM_Main task, void *task_cls)
Run a standard GNUnet command startup sequence (initialize loggers and configuration,...
Definition: program.c:364
void GNUNET_SCHEDULER_shutdown(void)
Request the shutdown of a scheduler.
Definition: scheduler.c:531
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_now(GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run as soon as possible.
Definition: scheduler.c:1296
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_select(enum GNUNET_SCHEDULER_Priority prio, struct GNUNET_TIME_Relative delay, const struct GNUNET_NETWORK_FDSet *rs, const struct GNUNET_NETWORK_FDSet *ws, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay or when any of the specified file descriptor set...
Definition: scheduler.c:1841
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed_with_priority(struct GNUNET_TIME_Relative delay, enum GNUNET_SCHEDULER_Priority priority, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
Definition: scheduler.c:1199
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,...
Definition: scheduler.c:1331
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:972
struct GNUNET_TIME_Relative GNUNET_TIME_relative_get_zero_(void)
Return relative time of 0ms.
Definition: time.c:100
#define GNUNET_TIME_UNIT_FOREVER_REL
Constant used to specify "forever".
const char * name
Definition of a command line option.
const char * description
Help text for the option (description)
A 512-bit hashcode.
struct GNUNET_MESSENGER_MessageText text
struct GNUNET_MESSENGER_MessageName name
struct GNUNET_MESSENGER_MessagePeer peer
enum GNUNET_MESSENGER_MessageKind kind
The kind of the message.
struct GNUNET_ShortHashCode sender_id
The senders id inside of the room the message was sent in.
char * name
The new name which replaces the current senders name.
struct GNUNET_PeerIdentity peer
The peer identity of the sender opening a room.
char * text
The containing text.
struct GNUNET_MESSENGER_MessageHeader header
Header.
struct GNUNET_MESSENGER_MessageBody body
Body.
collection of IO descriptors
The identity of the host (wraps the signing key of the peer).
struct GNUNET_CRYPTO_EddsaPublicKey public_key
Entry in list of pending tasks.
Definition: scheduler.c:135