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-rw-r--r--src/messenger/gnunet-messenger.c306
1 files changed, 306 insertions, 0 deletions
diff --git a/src/messenger/gnunet-messenger.c b/src/messenger/gnunet-messenger.c
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+++ b/src/messenger/gnunet-messenger.c
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+/*
+ This file is part of GNUnet.
+ Copyright (C) 2020 GNUnet e.V.
+
+ GNUnet is free software: you can redistribute it and/or modify it
+ under the terms of the GNU Affero General Public License as published
+ by the Free Software Foundation, either version 3 of the License,
+ or (at your option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ SPDX-License-Identifier: AGPL3.0-or-later
+ */
+/**
+ * @author Tobias Frisch
+ * @file src/messenger/gnunet-messenger.c
+ * @brief Print information about messenger groups.
+ */
+
+#include <stdio.h>
+
+#include "platform.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_messenger_service.h"
+
+struct GNUNET_MESSENGER_Handle *messenger;
+
+/**
+ * Function called whenever a message is received or sent.
+ *
+ * @param cls Closure
+ * @param room Room
+ * @param message Message
+ * @param hash Hash of message
+ */
+void
+on_message (void *cls, const struct GNUNET_MESSENGER_Room *room, const struct GNUNET_MESSENGER_Message *message,
+ const struct GNUNET_HashCode *hash)
+{
+ struct GNUNET_MESSENGER_Contact *sender = GNUNET_MESSENGER_get_member (room, &(message->header.sender_id));
+
+ const char *sender_name = GNUNET_MESSENGER_contact_get_name (sender);
+
+ if (!sender_name)
+ sender_name = "anonymous";
+
+ switch (message->header.kind)
+ {
+ case GNUNET_MESSENGER_KIND_JOIN:
+ {
+ printf ("* '%s' joined the room! [ %u %u %u %u ]\n", sender_name, message->body.join.key.ecdsa_key.q_y[0],
+ message->body.join.key.ecdsa_key.q_y[1], message->body.join.key.ecdsa_key.q_y[2],
+ message->body.join.key.ecdsa_key.q_y[3]);
+ break;
+ }
+ case GNUNET_MESSENGER_KIND_LEAVE:
+ {
+ printf ("* '%s' leaves the room!\n", sender_name);
+ break;
+ }
+ case GNUNET_MESSENGER_KIND_PEER:
+ {
+ printf ("* '%s' opened the room on: %s\n", sender_name, GNUNET_i2s_full (&(message->body.peer.peer)));
+ break;
+ }
+ case GNUNET_MESSENGER_KIND_TEXT:
+ {
+ printf ("* '%s' says: \"%s\"\n", sender_name, message->body.text.text);
+ break;
+ }
+ default:
+ {
+ break;
+ }
+ }
+}
+
+struct GNUNET_SCHEDULER_Task *read_task;
+
+/**
+ * Task to shut down this application.
+ *
+ * @param cls Closure
+ */
+static void
+shutdown_hook (void *cls)
+{
+ struct GNUNET_MESSENGER_Room *room = cls;
+
+ if (read_task)
+ GNUNET_SCHEDULER_cancel (read_task);
+
+ if (room)
+ GNUNET_MESSENGER_close_room (room);
+
+ if (messenger)
+ GNUNET_MESSENGER_disconnect (messenger);
+}
+
+static void
+listen_stdio (void *cls);
+
+#define MAX_BUFFER_SIZE 60000
+
+/**
+ * Task run in stdio mode, after some data is available at stdin.
+ *
+ * @param cls Closure
+ */
+static void
+read_stdio (void *cls)
+{
+ read_task = NULL;
+
+ char buffer[MAX_BUFFER_SIZE];
+ ssize_t length;
+
+ length = read (0, buffer, MAX_BUFFER_SIZE);
+
+ if ((length <= 0) || (length >= MAX_BUFFER_SIZE))
+ {
+ GNUNET_SCHEDULER_shutdown ();
+ return;
+ }
+
+ if (buffer[length - 1] == '\n')
+ buffer[length - 1] = '\0';
+ else
+ buffer[length] = '\0';
+
+ struct GNUNET_MESSENGER_Room *room = cls;
+
+ struct GNUNET_MESSENGER_Message message;
+ message.header.kind = GNUNET_MESSENGER_KIND_TEXT;
+ message.body.text.text = buffer;
+
+ GNUNET_MESSENGER_send_message (room, &message);
+
+ read_task = GNUNET_SCHEDULER_add_now (listen_stdio, cls);
+}
+
+/**
+ * Wait for input on STDIO and send it out over the #ch.
+ *
+ * @param cls Closure
+ */
+static void
+listen_stdio (void *cls)
+{
+ read_task = NULL;
+
+ struct GNUNET_NETWORK_FDSet *rs = GNUNET_NETWORK_fdset_create ();
+
+ GNUNET_NETWORK_fdset_set_native (rs, 0);
+
+ read_task = GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ rs,
+ NULL,
+ &read_stdio, cls);
+
+ GNUNET_NETWORK_fdset_destroy (rs);
+}
+
+/**
+ * Initial task to startup application.
+ *
+ * @param cls Closure
+ */
+static void
+idle (void *cls)
+{
+ struct GNUNET_MESSENGER_Room *room = cls;
+
+ printf ("* You joined the room.\n");
+
+ read_task = GNUNET_SCHEDULER_add_now (listen_stdio, room);
+}
+
+char *door_id;
+char *ego_name;
+char *room_key;
+
+struct GNUNET_SCHEDULER_Task *shutdown_task;
+
+/**
+ * Function called when an identity is retrieved.
+ *
+ * @param cls Closure
+ * @param handle Handle of messenger service
+ */
+static void
+on_identity (void *cls, struct GNUNET_MESSENGER_Handle *handle)
+{
+ struct GNUNET_HashCode key;
+ memset (&key, 0, sizeof(key));
+
+ if (room_key)
+ GNUNET_CRYPTO_hash (room_key, strlen (room_key), &key);
+
+ struct GNUNET_PeerIdentity *door = NULL;
+
+ if (door_id)
+ {
+ door = GNUNET_new(struct GNUNET_PeerIdentity);
+
+ if (GNUNET_OK != GNUNET_CRYPTO_eddsa_public_key_from_string (door_id, strlen (door_id), &(door->public_key)))
+ {
+ GNUNET_free(door);
+ door = NULL;
+ }
+ }
+
+ const char *name = GNUNET_MESSENGER_get_name (handle);
+
+ if (!name)
+ name = "anonymous";
+
+ printf ("* Welcome to the messenger, '%s'!\n", name);
+
+ struct GNUNET_MESSENGER_Room *room;
+
+ if (door)
+ {
+ printf ("* You try to entry a room...\n");
+
+ room = GNUNET_MESSENGER_entry_room (messenger, door, &key);
+ }
+ else
+ {
+ printf ("* You try to open a room...\n");
+
+ room = GNUNET_MESSENGER_open_room (messenger, &key);
+ }
+
+ GNUNET_SCHEDULER_cancel (shutdown_task);
+
+ shutdown_task = GNUNET_SCHEDULER_add_shutdown (shutdown_hook, room);
+
+ if (!room)
+ GNUNET_SCHEDULER_shutdown ();
+ else
+ GNUNET_SCHEDULER_add_delayed_with_priority (GNUNET_TIME_relative_get_zero_ (), GNUNET_SCHEDULER_PRIORITY_IDLE, idle,
+ room);
+}
+
+/**
+ * Main function that will be run by the scheduler.
+ *
+ * @param cls closure
+ * @param args remaining command-line arguments
+ * @param cfgfile name of the configuration file used (for saving, can be NULL!)
+ * @param cfg configuration
+ */
+static void
+run (void *cls, char *const*args, const char *cfgfile, const struct GNUNET_CONFIGURATION_Handle *cfg)
+{
+ messenger = GNUNET_MESSENGER_connect (cfg, ego_name, &on_identity, NULL, &on_message, NULL);
+
+ shutdown_task = GNUNET_SCHEDULER_add_shutdown (shutdown_hook, NULL);
+}
+
+/**
+ * The main function to obtain messenger information.
+ *
+ * @param argc number of arguments from the command line
+ * @param argv command line arguments
+ * @return 0 ok, 1 on error
+ */
+int
+main (int argc, char **argv)
+{
+ const char *description = "Open and connect to rooms using the MESSENGER to chat.";
+
+ struct GNUNET_GETOPT_CommandLineOption options[] = {
+ GNUNET_GETOPT_option_string ('d',
+ "door",
+ "PEERIDENTITY",
+ "peer identity to entry into the room",
+ &door_id),
+ GNUNET_GETOPT_option_string ('e',
+ "ego",
+ "IDENTITY",
+ "identity to use for messaging",
+ &ego_name),
+ GNUNET_GETOPT_option_string ('r',
+ "room",
+ "ROOMKEY",
+ "key of the room to connect to",
+ &room_key),
+ GNUNET_GETOPT_OPTION_END };
+
+ return (GNUNET_OK == GNUNET_PROGRAM_run (argc,
+ argv,
+ "gnunet-messenger\0",
+ gettext_noop(description),
+ options,
+ &run,
+ NULL) ? EXIT_SUCCESS : EXIT_FAILURE);
+}