Moved daemon functions from libguac

This commit is contained in:
Michael Jumper 2011-11-23 00:01:27 -08:00
parent 6f27f97289
commit e4cbb8b4e8
4 changed files with 274 additions and 2 deletions

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@ -37,12 +37,13 @@
AUTOMAKE_OPTIONS = foreign
initdir = @init_dir@
AM_CFLAGS = -Werror -Wall -pedantic
AM_CFLAGS = -Werror -Wall -pedantic -Iinclude
sbin_PROGRAMS = guacd
init_SCRIPTS = init.d/guacd
guacd_SOURCES = src/daemon.c
noinst_HEADERS = include/client.h
guacd_SOURCES = src/daemon.c src/client.c
EXTRA_DIST = init.d/guacd.in
CLEANFILES = $(init_SCRIPTS)

91
guacd/include/client.h Normal file
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@ -0,0 +1,91 @@
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is guacd.
*
* The Initial Developer of the Original Code is
* Michael Jumper.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef _GUACD_CLIENT_H
#define _GUACD_CLIENT_H
/**
* Provides functions and structures required for defining (and handling) a proxy client.
*
* @file client.h
*/
/**
* The time to allow between sync responses in milliseconds. If a sync
* instruction is sent to the client and no response is received within this
* timeframe, server messages will not be handled until a sync instruction is
* received from the client.
*/
#define GUAC_SYNC_THRESHOLD 500
/**
* The time to allow between server sync messages in milliseconds. A sync
* message from the server will be sent every GUAC_SYNC_FREQUENCY milliseconds.
* As this will induce a response from a client that is not malfunctioning,
* this is used to detect when a client has died. This must be set to a
* reasonable value to avoid clients being disconnected unnecessarily due
* to timeout.
*/
#define GUAC_SYNC_FREQUENCY 5000
/**
* The amount of time to wait after handling server messages. If a client
* plugin has a message handler, and sends instructions when server messages
* are being handled, there will be a pause of this many milliseconds before
* the next call to the message handler.
*/
#define GUAC_SERVER_MESSAGE_HANDLE_FREQUENCY 50
/**
* The number of milliseconds to wait for messages in any phase before
* timing out and closing the connection with an error.
*/
#define GUAC_TIMEOUT 15000
/**
* The number of microseconds to wait for messages in any phase before
* timing out and closing the conncetion with an error. This is always
* equal to GUAC_TIMEOUT * 1000.
*/
#define GUAC_USEC_TIMEOUT (GUAC_TIMEOUT*1000)
void guac_client_stop(guac_client* client);
int guac_start_client(guac_client* client);
#endif

179
guacd/src/client.c Normal file
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@ -0,0 +1,179 @@
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is guacd.
*
* The Initial Developer of the Original Code is
* Michael Jumper.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include <stdlib.h>
#include <guacamole/guacio.h>
#include <guacamole/client.h>
#include <guacamole/log.h>
#include <guacamole/thread.h>
#include "client.h"
void guac_client_stop(guac_client* client) {
client->state = STOPPING;
}
void* __guac_client_output_thread(void* data) {
guac_client* client = (guac_client*) data;
GUACIO* io = client->io;
guac_timestamp last_ping_timestamp = guac_current_timestamp();
/* Guacamole client output loop */
while (client->state == RUNNING) {
/* Occasionally ping client with repeat of last sync */
guac_timestamp timestamp = guac_current_timestamp();
if (timestamp - last_ping_timestamp > GUAC_SYNC_FREQUENCY) {
last_ping_timestamp = timestamp;
if (
guac_send_sync(io, client->last_sent_timestamp)
|| guac_flush(io)
) {
guac_client_stop(client);
return NULL;
}
}
/* Handle server messages */
if (client->handle_messages) {
/* Get previous GUACIO state */
int last_total_written = io->total_written;
/* Only handle messages if synced within threshold */
if (client->last_sent_timestamp - client->last_received_timestamp
< GUAC_SYNC_THRESHOLD) {
int retval = client->handle_messages(client);
if (retval) {
guac_log_error("Error handling server messages");
guac_client_stop(client);
return NULL;
}
/* If data was written during message handling */
if (io->total_written != last_total_written) {
/* Sleep as necessary */
guac_sleep(GUAC_SERVER_MESSAGE_HANDLE_FREQUENCY);
/* Send sync instruction */
client->last_sent_timestamp = guac_current_timestamp();
if (guac_send_sync(io, client->last_sent_timestamp)) {
guac_client_stop(client);
return NULL;
}
}
if (guac_flush(io)) {
guac_client_stop(client);
return NULL;
}
}
/* If sync threshold exceeded, don't spin waiting for resync */
else
guac_sleep(GUAC_SERVER_MESSAGE_HANDLE_FREQUENCY);
}
/* If no message handler, just sleep until next sync ping */
else
guac_sleep(GUAC_SYNC_FREQUENCY);
} /* End of output loop */
guac_client_stop(client);
return NULL;
}
void* __guac_client_input_thread(void* data) {
guac_client* client = (guac_client*) data;
GUACIO* io = client->io;
guac_instruction instruction;
/* Guacamole client input loop */
while (client->state == RUNNING && guac_read_instruction(io, &instruction) > 0) {
/* Call handler, stop on error */
if (guac_client_handle_instruction(client, &instruction) < 0) {
guac_free_instruction_data(&instruction);
break;
}
/* Free allocate instruction data */
guac_free_instruction_data(&instruction);
}
guac_client_stop(client);
return NULL;
}
int guac_start_client(guac_client* client) {
guac_thread input_thread, output_thread;
if (guac_thread_create(&output_thread, __guac_client_output_thread, (void*) client)) {
return -1;
}
if (guac_thread_create(&input_thread, __guac_client_input_thread, (void*) client)) {
guac_client_stop(client);
guac_thread_join(output_thread);
return -1;
}
/* Wait for I/O threads */
guac_thread_join(input_thread);
guac_thread_join(output_thread);
/* Done */
return 0;
}

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@ -51,6 +51,7 @@
#include <guacamole/thread.h>
#include <guacamole/log.h>
#include "client.h"
typedef struct client_thread_data {