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/*
Copyright (C) 2005-2009 Michel de Boer <michel@twinklephone.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <cstdlib>
#include <cstring>
#include <iostream>
#include "cmd_socket.h"
#include "log.h"
#include "sys_settings.h"
#include "userintf.h"
#include "util.h"
#include "audits/memman.h"
#include "sockets/socket.h"
namespace cmdsocket {
/** Command opcodes */
enum t_cmd_code {
CMD_CALL, /**< Call */
CMD_CLI, /**< Any CLI command */
CMD_SHOW, /**< Show Twinkle */
CMD_HIDE /**< Hide Twinkle */
};
string cmd_code2str(t_cmd_code opcode) {
switch (opcode) {
case CMD_CALL:
return "CALL";
case CMD_CLI:
return "CLI";
case CMD_SHOW:
return "SHOW";
case CMD_HIDE:
return "HIDE";
default:
return "UNKNOWN";
}
}
void exec_cmd(t_socket_local &sock_client) {
t_cmd_code opcode;
bool immediate;
int len;
string log_msg;
try {
if (sock_client.read(&opcode, sizeof(opcode)) != sizeof(opcode)) {
log_file->write_report("Failed to read opcode from socket.",
"cmdsocket::exec_cmd", LOG_NORMAL, LOG_WARNING);
return;
}
if (sock_client.read(&immediate, sizeof(immediate)) != sizeof(immediate)) {
log_file->write_report("Failed to read immediate mode from socket.",
"cmdsocket::exec_cmd", LOG_NORMAL, LOG_WARNING);
return;
}
if (sock_client.read(&len, sizeof(len)) != sizeof(len)) {
log_file->write_report("Failed to read length from socket.",
"cmdsocket::exec_cmd", LOG_NORMAL, LOG_WARNING);
return;
}
char args[len];
if (sock_client.read(args, len) != len) {
log_file->write_report("Failed to read arguments from socket.",
"cmdsocket::exec_cmd", LOG_NORMAL, LOG_WARNING);
return;
}
log_file->write_header("cmdsocket::exec_cmd", LOG_NORMAL, LOG_DEBUG);
log_file->write_raw("External command received:\n");
log_file->write_raw("Opcode: ");
log_file->write_raw(cmd_code2str(opcode));
log_file->write_raw("\nImmediate: ");
log_file->write_raw(bool2yesno(immediate));
log_file->write_raw("\nArguments: ");
log_file->write_raw(args);
log_file->write_endl();
log_file->write_footer();
switch (opcode) {
case CMD_CALL:
ui->cmd_call(args, immediate);
break;
case CMD_CLI:
ui->cmd_cli(args, immediate);
break;
case CMD_SHOW:
ui->cmd_show();
break;
case CMD_HIDE:
ui->cmd_hide();
break;
default:
// Discard unknown commands
log_file->write_header("cmdsocket::exec_cmd", LOG_NORMAL, LOG_WARNING);
log_file->write_raw("Unknown external command received:\n");
log_file->write_raw("Opcode: ");
log_file->write_raw(cmd_code2str(opcode));
log_file->write_raw("\nImmediate: ");
log_file->write_raw(bool2yesno(immediate));
log_file->write_raw("\nArguments: ");
log_file->write_raw(args);
log_file->write_endl();
log_file->write_footer();
break;
}
}
catch (int e) {
log_msg = "Failed to read from socket.\n";
log_msg += get_error_str(e);
log_msg += "\n";
log_file->write_report(log_msg, "cmdsocket::exec_cmd", LOG_NORMAL, LOG_WARNING);
}
}
void *listen_cmd(void *arg) {
t_socket_local *sock_cmd = (t_socket_local *)arg;
string log_msg;
while (true) {
try {
int fd = sock_cmd->accept();
t_socket_local sock_client(fd);
exec_cmd(sock_client);
}
catch (int e) {
log_msg = "Accept failed on socket.\n";
log_msg += get_error_str(e);
log_msg += "\n";
log_file->write_report(log_msg, "cmdsocket::listen_cmd", LOG_NORMAL,
LOG_WARNING);
return NULL;
}
}
}
void write_cmd_to_socket(t_cmd_code opcode, bool immediate, const string &args) {
string name = sys_config->get_dir_user();
name += '/';
name += CMD_SOCKNAME;
try {
t_socket_local sock_cmd;
sock_cmd.connect(name);
sock_cmd.write(&opcode, sizeof(opcode));
sock_cmd.write(&immediate, sizeof(immediate));
int len = args.size() + 1;
sock_cmd.write(&len, sizeof(len));
char *buf = strdup(args.c_str());
MEMMAN_NEW(buf);
sock_cmd.write(buf, len);
MEMMAN_DELETE(buf);
free(buf);
}
catch (int e) {
// This function will be called from Twinkle when it
// notices another Twinkle is already running. In that
// case this process does not have a log file. So write
// errors to stderr
cerr << "Failed to send " << cmd_code2str(opcode) << " command to " << name << endl;
cerr << get_error_str(e) << endl;
}
}
void cmd_call(const string &destination, bool immediate) {
write_cmd_to_socket(CMD_CALL, immediate, destination);
}
void cmd_cli(const string &cli_command, bool immediate) {
write_cmd_to_socket(CMD_CLI, immediate, cli_command);
}
void cmd_show(void) {
write_cmd_to_socket(CMD_SHOW, true, "");
}
void cmd_hide(void) {
write_cmd_to_socket(CMD_HIDE, true, "");
}
}
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