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guacamole-spice-protocol/src/protocols/telnet/client.c

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/*
* Copyright (C) 2013 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "config.h"
#include "client.h"
#include "clipboard.h"
#include "guac_handlers.h"
#include "telnet_client.h"
#include "terminal.h"
#include <langinfo.h>
#include <locale.h>
#include <pthread.h>
#include <regex.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <guacamole/client.h>
#include <guacamole/protocol.h>
#include <guacamole/socket.h>
#define GUAC_TELNET_DEFAULT_FONT_NAME "monospace"
#define GUAC_TELNET_DEFAULT_FONT_SIZE 12
#define GUAC_TELNET_DEFAULT_PORT "23"
/* Client plugin arguments */
const char* GUAC_CLIENT_ARGS[] = {
"hostname",
"port",
"username",
"username-regex",
"password",
"password-regex",
"font-name",
"font-size",
"color-scheme",
"typescript-path",
"typescript-name",
"create-typescript-path",
NULL
};
enum __TELNET_ARGS_IDX {
/**
* The hostname to connect to. Required.
*/
IDX_HOSTNAME,
/**
* The port to connect to. Optional.
*/
IDX_PORT,
/**
* The name of the user to login as. Optional.
*/
IDX_USERNAME,
/**
* The regular expression to use when searching for the username/login prompt.
* Optional.
*/
IDX_USERNAME_REGEX,
/**
* The password to use when logging in. Optional.
*/
IDX_PASSWORD,
/**
* The regular expression to use when searching for the password prompt.
* Optional.
*/
IDX_PASSWORD_REGEX,
/**
* The name of the font to use within the terminal.
*/
IDX_FONT_NAME,
/**
* The size of the font to use within the terminal, in points.
*/
IDX_FONT_SIZE,
/**
* The name of the color scheme to use. Currently valid color schemes are:
* "black-white", "white-black", "gray-black", and "green-black", each
* following the "foreground-background" pattern. By default, this will be
* "gray-black".
*/
IDX_COLOR_SCHEME,
/**
* The full absolute path to the directory in which typescripts should be
* written.
*/
IDX_TYPESCRIPT_PATH,
/**
* The name that should be given to typescripts which are written in the
* given path. Each typescript will consist of two files: "NAME" and
* "NAME.timing".
*/
IDX_TYPESCRIPT_NAME,
/**
* Whether the specified typescript path should automatically be created
* if it does not yet exist.
*/
IDX_CREATE_TYPESCRIPT_PATH,
TELNET_ARGS_COUNT
};
/**
* Compiles the given regular expression, returning NULL if compilation fails.
*/
static regex_t* __guac_telnet_compile_regex(guac_client* client, char* pattern) {
int compile_result;
regex_t* regex = malloc(sizeof(regex_t));
/* Compile regular expression */
compile_result = regcomp(regex, pattern,REG_EXTENDED | REG_NOSUB | REG_ICASE | REG_NEWLINE);
/* Notify of failure to parse/compile */
if (compile_result != 0) {
guac_client_log(client, GUAC_LOG_ERROR, "Regular expression '%s' could not be compiled.", pattern);
free(regex);
return NULL;
}
return regex;
}
int guac_client_init(guac_client* client, int argc, char** argv) {
guac_socket* socket = client->socket;
guac_telnet_client_data* client_data = malloc(sizeof(guac_telnet_client_data));
/* Init client data */
client->data = client_data;
client_data->telnet = NULL;
client_data->socket_fd = -1;
client_data->naws_enabled = 0;
client_data->echo_enabled = 1;
if (argc != TELNET_ARGS_COUNT) {
guac_client_abort(client, GUAC_PROTOCOL_STATUS_SERVER_ERROR, "Wrong number of arguments");
return -1;
}
/* Set locale and warn if not UTF-8 */
setlocale(LC_CTYPE, "");
if (strcmp(nl_langinfo(CODESET), "UTF-8") != 0)
guac_client_log(client, GUAC_LOG_INFO, "Current locale does not use UTF-8. Some characters may not render correctly.");
/* Read parameters */
strcpy(client_data->hostname, argv[IDX_HOSTNAME]);
strcpy(client_data->username, argv[IDX_USERNAME]);
strcpy(client_data->password, argv[IDX_PASSWORD]);
/* Set username regex, if needed */
if (client_data->username[0] != 0) {
/* Compile regular expression */
if (argv[IDX_USERNAME_REGEX][0] != 0)
client_data->username_regex = __guac_telnet_compile_regex(client, argv[IDX_USERNAME_REGEX]);
else
client_data->username_regex = __guac_telnet_compile_regex(client, GUAC_TELNET_DEFAULT_USERNAME_REGEX);
}
else
client_data->username_regex = NULL;
/* Set password regex, if needed */
if (client_data->password[0] != 0) {
/* Compile regular expression */
if (argv[IDX_PASSWORD_REGEX][0] != 0)
client_data->password_regex = __guac_telnet_compile_regex(client, argv[IDX_PASSWORD_REGEX]);
else
client_data->password_regex = __guac_telnet_compile_regex(client, GUAC_TELNET_DEFAULT_PASSWORD_REGEX);
}
else
client_data->password_regex = NULL;
/* Read port */
if (argv[IDX_PORT][0] != 0)
strcpy(client_data->port, argv[IDX_PORT]);
else
strcpy(client_data->port, GUAC_TELNET_DEFAULT_PORT);
/* Read font name */
if (argv[IDX_FONT_NAME][0] != 0)
strcpy(client_data->font_name, argv[IDX_FONT_NAME]);
else
strcpy(client_data->font_name, GUAC_TELNET_DEFAULT_FONT_NAME );
/* Read font size */
if (argv[IDX_FONT_SIZE][0] != 0)
client_data->font_size = atoi(argv[IDX_FONT_SIZE]);
else
client_data->font_size = GUAC_TELNET_DEFAULT_FONT_SIZE;
/* Create terminal */
client_data->term = guac_terminal_create(client,
client_data->font_name, client_data->font_size,
client->info.optimal_resolution,
client->info.optimal_width, client->info.optimal_height,
argv[IDX_COLOR_SCHEME]);
/* Fail if terminal init failed */
if (client_data->term == NULL) {
guac_client_abort(client, GUAC_PROTOCOL_STATUS_SERVER_ERROR, "Terminal initialization failed");
return -1;
}
/* Set up typescript, if requested */
const char* typescript_path = argv[IDX_TYPESCRIPT_PATH];
if (typescript_path[0] != 0) {
/* Default to "typescript" if no name provided */
const char* typescript_name = argv[IDX_TYPESCRIPT_NAME];
if (typescript_name[0] == 0)
typescript_name = "typescript";
/* Parse path creation flag */
int create_path =
strcmp(argv[IDX_CREATE_TYPESCRIPT_PATH], "true") == 0;
/* Create typescript */
guac_terminal_create_typescript(client_data->term, typescript_path,
typescript_name, create_path);
}
/* Send initial name */
guac_protocol_send_name(socket, client_data->hostname);
guac_socket_flush(socket);
/* Set basic handlers */
client->handle_messages = guac_telnet_client_handle_messages;
client->key_handler = guac_telnet_client_key_handler;
client->mouse_handler = guac_telnet_client_mouse_handler;
client->size_handler = guac_telnet_client_size_handler;
client->free_handler = guac_telnet_client_free_handler;
client->clipboard_handler = guac_telnet_clipboard_handler;
/* Start client thread */
if (pthread_create(&(client_data->client_thread), NULL, guac_telnet_client_thread, (void*) client)) {
guac_client_abort(client, GUAC_PROTOCOL_STATUS_SERVER_ERROR, "Unable to start telnet client thread");
return -1;
}
/* Success */
return 0;
}
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