GUACAMOLE-221: Migrate telnet handling of "argv" to guac_argv_*() convenience API.
This commit is contained in:
parent
2f6de25418
commit
08a57d3375
@ -29,127 +29,27 @@
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
/**
|
||||
* All telnet connection settings which may be updated by unprivileged users
|
||||
* through "argv" streams.
|
||||
*/
|
||||
typedef enum guac_telnet_argv_setting {
|
||||
|
||||
/**
|
||||
* The color scheme of the terminal.
|
||||
*/
|
||||
GUAC_TELNET_ARGV_SETTING_COLOR_SCHEME,
|
||||
|
||||
/**
|
||||
* The name of the font family used by the terminal.
|
||||
*/
|
||||
GUAC_TELNET_ARGV_SETTING_FONT_NAME,
|
||||
|
||||
/**
|
||||
* The size of the font used by the terminal, in points.
|
||||
*/
|
||||
GUAC_TELNET_ARGV_SETTING_FONT_SIZE
|
||||
|
||||
} guac_telnet_argv_setting;
|
||||
|
||||
/**
|
||||
* The value or current status of a connection parameter received over an
|
||||
* "argv" stream.
|
||||
*/
|
||||
typedef struct guac_telnet_argv {
|
||||
|
||||
/**
|
||||
* The specific setting being updated.
|
||||
*/
|
||||
guac_telnet_argv_setting setting;
|
||||
|
||||
/**
|
||||
* Buffer space for containing the received argument value.
|
||||
*/
|
||||
char buffer[GUAC_TELNET_ARGV_MAX_LENGTH];
|
||||
|
||||
/**
|
||||
* The number of bytes received so far.
|
||||
*/
|
||||
int length;
|
||||
|
||||
} guac_telnet_argv;
|
||||
|
||||
/**
|
||||
* Handler for "blob" instructions which appends the data from received blobs
|
||||
* to the end of the in-progress argument value buffer.
|
||||
*
|
||||
* @see guac_user_blob_handler
|
||||
*/
|
||||
static int guac_telnet_argv_blob_handler(guac_user* user,
|
||||
guac_stream* stream, void* data, int length) {
|
||||
|
||||
guac_telnet_argv* argv = (guac_telnet_argv*) stream->data;
|
||||
|
||||
/* Calculate buffer size remaining, including space for null terminator,
|
||||
* adjusting received length accordingly */
|
||||
int remaining = sizeof(argv->buffer) - argv->length - 1;
|
||||
if (length > remaining)
|
||||
length = remaining;
|
||||
|
||||
/* Append received data to end of buffer */
|
||||
memcpy(argv->buffer + argv->length, data, length);
|
||||
argv->length += length;
|
||||
|
||||
return 0;
|
||||
|
||||
}
|
||||
|
||||
/**
|
||||
* Handler for "end" instructions which applies the changes specified by the
|
||||
* argument value buffer associated with the stream.
|
||||
*
|
||||
* @see guac_user_end_handler
|
||||
*/
|
||||
static int guac_telnet_argv_end_handler(guac_user* user,
|
||||
guac_stream* stream) {
|
||||
|
||||
int size;
|
||||
int guac_telnet_argv_callback(guac_user* user, const char* mimetype,
|
||||
const char* name, const char* value, void* data) {
|
||||
|
||||
guac_client* client = user->client;
|
||||
guac_telnet_client* telnet_client = (guac_telnet_client*) client->data;
|
||||
guac_terminal* terminal = telnet_client->term;
|
||||
|
||||
/* Append null terminator to value */
|
||||
guac_telnet_argv* argv = (guac_telnet_argv*) stream->data;
|
||||
argv->buffer[argv->length] = '\0';
|
||||
/* Update color scheme */
|
||||
if (strcmp(name, GUAC_TELNET_ARGV_COLOR_SCHEME) == 0)
|
||||
guac_terminal_apply_color_scheme(terminal, value);
|
||||
|
||||
/* Apply changes to chosen setting */
|
||||
switch (argv->setting) {
|
||||
|
||||
/* Update color scheme */
|
||||
case GUAC_TELNET_ARGV_SETTING_COLOR_SCHEME:
|
||||
guac_terminal_apply_color_scheme(terminal, argv->buffer);
|
||||
guac_client_stream_argv(client, client->socket, "text/plain",
|
||||
"color-scheme", argv->buffer);
|
||||
break;
|
||||
|
||||
/* Update font name */
|
||||
case GUAC_TELNET_ARGV_SETTING_FONT_NAME:
|
||||
guac_terminal_apply_font(terminal, argv->buffer, -1, 0);
|
||||
guac_client_stream_argv(client, client->socket, "text/plain",
|
||||
"font-name", argv->buffer);
|
||||
break;
|
||||
|
||||
/* Update font size */
|
||||
case GUAC_TELNET_ARGV_SETTING_FONT_SIZE:
|
||||
|
||||
/* Update only if font size is sane */
|
||||
size = atoi(argv->buffer);
|
||||
if (size > 0) {
|
||||
guac_terminal_apply_font(terminal, NULL, size,
|
||||
telnet_client->settings->resolution);
|
||||
guac_client_stream_argv(client, client->socket, "text/plain",
|
||||
"font-size", argv->buffer);
|
||||
}
|
||||
|
||||
break;
|
||||
/* Update font name */
|
||||
else if (strcmp(name, GUAC_TELNET_ARGV_FONT_NAME) == 0)
|
||||
guac_terminal_apply_font(terminal, value, -1, 0);
|
||||
|
||||
/* Update only if font size is sane */
|
||||
else if (strcmp(name, GUAC_TELNET_ARGV_FONT_SIZE) == 0) {
|
||||
int size = atoi(value);
|
||||
if (size > 0)
|
||||
guac_terminal_apply_font(terminal, NULL, size,
|
||||
telnet_client->settings->resolution);
|
||||
}
|
||||
|
||||
/* Update terminal window size if connected */
|
||||
@ -157,45 +57,6 @@ static int guac_telnet_argv_end_handler(guac_user* user,
|
||||
guac_telnet_send_naws(telnet_client->telnet, terminal->term_width,
|
||||
terminal->term_height);
|
||||
|
||||
free(argv);
|
||||
return 0;
|
||||
|
||||
}
|
||||
|
||||
int guac_telnet_argv_handler(guac_user* user, guac_stream* stream,
|
||||
char* mimetype, char* name) {
|
||||
|
||||
guac_telnet_argv_setting setting;
|
||||
|
||||
/* Allow users to update the color scheme and font details */
|
||||
if (strcmp(name, "color-scheme") == 0)
|
||||
setting = GUAC_TELNET_ARGV_SETTING_COLOR_SCHEME;
|
||||
else if (strcmp(name, "font-name") == 0)
|
||||
setting = GUAC_TELNET_ARGV_SETTING_FONT_NAME;
|
||||
else if (strcmp(name, "font-size") == 0)
|
||||
setting = GUAC_TELNET_ARGV_SETTING_FONT_SIZE;
|
||||
|
||||
/* No other connection parameters may be updated */
|
||||
else {
|
||||
guac_protocol_send_ack(user->socket, stream, "Not allowed.",
|
||||
GUAC_PROTOCOL_STATUS_CLIENT_FORBIDDEN);
|
||||
guac_socket_flush(user->socket);
|
||||
return 0;
|
||||
}
|
||||
|
||||
guac_telnet_argv* argv = malloc(sizeof(guac_telnet_argv));
|
||||
argv->setting = setting;
|
||||
argv->length = 0;
|
||||
|
||||
/* Prepare stream to receive argument value */
|
||||
stream->blob_handler = guac_telnet_argv_blob_handler;
|
||||
stream->end_handler = guac_telnet_argv_end_handler;
|
||||
stream->data = argv;
|
||||
|
||||
/* Signal stream is ready */
|
||||
guac_protocol_send_ack(user->socket, stream, "Ready for updated "
|
||||
"parameter.", GUAC_PROTOCOL_STATUS_SUCCESS);
|
||||
guac_socket_flush(user->socket);
|
||||
return 0;
|
||||
|
||||
}
|
||||
@ -206,18 +67,18 @@ void* guac_telnet_send_current_argv(guac_user* user, void* data) {
|
||||
guac_terminal* terminal = telnet_client->term;
|
||||
|
||||
/* Send current color scheme */
|
||||
guac_user_stream_argv(user, user->socket, "text/plain", "color-scheme",
|
||||
terminal->color_scheme);
|
||||
guac_user_stream_argv(user, user->socket, "text/plain",
|
||||
GUAC_TELNET_ARGV_COLOR_SCHEME, terminal->color_scheme);
|
||||
|
||||
/* Send current font name */
|
||||
guac_user_stream_argv(user, user->socket, "text/plain", "font-name",
|
||||
terminal->font_name);
|
||||
guac_user_stream_argv(user, user->socket, "text/plain",
|
||||
GUAC_TELNET_ARGV_FONT_NAME, terminal->font_name);
|
||||
|
||||
/* Send current font size */
|
||||
char font_size[64];
|
||||
sprintf(font_size, "%i", terminal->font_size);
|
||||
guac_user_stream_argv(user, user->socket, "text/plain", "font-size",
|
||||
font_size);
|
||||
guac_user_stream_argv(user, user->socket, "text/plain",
|
||||
GUAC_TELNET_ARGV_FONT_SIZE, font_size);
|
||||
|
||||
return NULL;
|
||||
|
||||
|
@ -23,19 +23,32 @@
|
||||
|
||||
#include "config.h"
|
||||
|
||||
#include <guacamole/argv.h>
|
||||
#include <guacamole/user.h>
|
||||
|
||||
/**
|
||||
* The maximum number of bytes to allow for any argument value received via an
|
||||
* argv stream, including null terminator.
|
||||
* The name of the parameter that specifies/updates the color scheme used by
|
||||
* the terminal emulator.
|
||||
*/
|
||||
#define GUAC_TELNET_ARGV_MAX_LENGTH 16384
|
||||
#define GUAC_TELNET_ARGV_COLOR_SCHEME "color-scheme"
|
||||
|
||||
/**
|
||||
* Handles an incoming stream from a Guacamole "argv" instruction, updating the
|
||||
* given connection parameter if that parameter is allowed to be updated.
|
||||
* The name of the parameter that specifies/updates the name of the font used
|
||||
* by the terminal emulator.
|
||||
*/
|
||||
guac_user_argv_handler guac_telnet_argv_handler;
|
||||
#define GUAC_TELNET_ARGV_FONT_NAME "font-name"
|
||||
|
||||
/**
|
||||
* The name of the parameter that specifies/updates the font size used by the
|
||||
* terminal emulator.
|
||||
*/
|
||||
#define GUAC_TELNET_ARGV_FONT_SIZE "font-size"
|
||||
|
||||
/**
|
||||
* Handles a received argument value from a Guacamole "argv" instruction,
|
||||
* updating the given connection parameter.
|
||||
*/
|
||||
guac_argv_callback guac_telnet_argv_callback;
|
||||
|
||||
/**
|
||||
* Sends the current values of all non-sensitive parameters which may be set
|
||||
|
@ -18,6 +18,7 @@
|
||||
*/
|
||||
|
||||
#include "config.h"
|
||||
#include "argv.h"
|
||||
#include "client.h"
|
||||
#include "common/recording.h"
|
||||
#include "settings.h"
|
||||
@ -31,6 +32,7 @@
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
#include <guacamole/argv.h>
|
||||
#include <guacamole/client.h>
|
||||
|
||||
int guac_client_init(guac_client* client) {
|
||||
@ -54,6 +56,11 @@ int guac_client_init(guac_client* client) {
|
||||
client->join_handler = guac_telnet_user_join_handler;
|
||||
client->free_handler = guac_telnet_client_free_handler;
|
||||
|
||||
/* Register handlers for argument values that may be sent after the handshake */
|
||||
guac_argv_register(GUAC_TELNET_ARGV_COLOR_SCHEME, guac_telnet_argv_callback, NULL, GUAC_ARGV_OPTION_ECHO);
|
||||
guac_argv_register(GUAC_TELNET_ARGV_FONT_NAME, guac_telnet_argv_callback, NULL, GUAC_ARGV_OPTION_ECHO);
|
||||
guac_argv_register(GUAC_TELNET_ARGV_FONT_SIZE, guac_telnet_argv_callback, NULL, GUAC_ARGV_OPTION_ECHO);
|
||||
|
||||
/* Set locale and warn if not UTF-8 */
|
||||
setlocale(LC_CTYPE, "");
|
||||
if (strcmp(nl_langinfo(CODESET), "UTF-8") != 0) {
|
||||
|
@ -19,6 +19,7 @@
|
||||
|
||||
#include "config.h"
|
||||
|
||||
#include "argv.h"
|
||||
#include "common/defaults.h"
|
||||
#include "settings.h"
|
||||
|
||||
@ -39,9 +40,9 @@ const char* GUAC_TELNET_CLIENT_ARGS[] = {
|
||||
"username-regex",
|
||||
"password",
|
||||
"password-regex",
|
||||
"font-name",
|
||||
"font-size",
|
||||
"color-scheme",
|
||||
GUAC_TELNET_ARGV_FONT_NAME,
|
||||
GUAC_TELNET_ARGV_FONT_SIZE,
|
||||
GUAC_TELNET_ARGV_COLOR_SCHEME,
|
||||
"typescript-path",
|
||||
"typescript-name",
|
||||
"create-typescript-path",
|
||||
|
@ -92,7 +92,7 @@ int guac_telnet_user_join_handler(guac_user* user, int argc, char** argv) {
|
||||
user->pipe_handler = guac_telnet_pipe_handler;
|
||||
|
||||
/* Updates to connection parameters */
|
||||
user->argv_handler = guac_telnet_argv_handler;
|
||||
user->argv_handler = guac_argv_handler;
|
||||
|
||||
/* Display size change events */
|
||||
user->size_handler = guac_telnet_user_size_handler;
|
||||
|
Loading…
Reference in New Issue
Block a user