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/*
* Usurpation – server daemon main logic
*
* Copyright (C) 2019 Gediminas Jakutis
* Copyright (C) 2019 Paulius Ratkevičius
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; version 2.1
* of the License.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <unistd.h>
#include <time.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "settings.h"
#include "net.h"
#include "purple.h"
#include "proto_stdio.h"
#include "tlv.h"
#include "utils.h"
static struct _state {
int nd;
} __progstate;
static void cleanup(void);
static int __main_loop(const struct timespec * const iter_len);
static int does_my_kokoro_go_doki_doki(struct tlv *tlv);
/* the logic is a placeholder right now */
int main(int argc, char **argv)
{
extern const char * const version;
static const struct timespec t = {0, 250 * 1000 * 1000}; /* 250ms */
char *proto;
printf("Usurpation daemon version %s starting\n", version);
atexit(cleanup);
settings_init();
__progstate.nd = net_init(setting_port());
proto = setting_im_proto();
if (strcmp(proto, "null")) {
if (purple_init() && setting_verbose()) {
fprintf(stderr, "libpurple initialization failed\n");
}
} else {
if (proto_stdio_init() && setting_verbose()) {
fprintf(stderr, "stdio interface initialization failed\n");
}
}
free(proto);
proto = NULL;
/* by default and if running by as a system service, the init system
* needs to keep control of the process and thus only detach if
* requested when ran manually by a user.
*/
if (setting_detach()) {
daemon(0, 0);
}
return __main_loop(&t);
}
/* TODO: semi-stub */
static int __main_loop(const struct timespec * const iter_len)
{
struct tlv_packet pack;
struct tlv field;
struct timespec t;
char *buf = NULL;
size_t recvsize;
int ret = A_OK;
t = *iter_len;
tlv_packet_init(&pack);
while (ret != ERROR) {
ret = net_getlastdata(__progstate.nd, &buf, &recvsize);
if (ret != A_OK) {
goto skiprecv;
}
/* we're only sending one TLV per packet as of now,
* so no need to save the pointer for further parsing
*/
ret = tlv_get(buf, &field, NULL);
/* handles discovery */
if (ret != A_OK || !(does_my_kokoro_go_doki_doki(&field))) {
goto skiprecv;
}
/* handles receiving messages */
if (field.head.type == TEXT) {
message_receive(field.data);
}
/* jumping here if did not receive any data */
skiprecv:
/* handles sending messages */
if (message_send(&field)) {
if (field.head.size) {
tlv_pack(&pack, &field);
tlv_packet_finalize(&pack);
tlv_destroy(&field);
net_send(__progstate.nd, pack.data, pack.cursor + 1);
tlv_packet_reset(&pack);
}
}
nanosleep(&t, NULL);
}
tlv_packet_destroy(&pack);
return ret;
}
static int does_my_kokoro_go_doki_doki(struct tlv *tlv)
{
int ret = ERROR;
static struct tlv_packet pack;
static size_t firstrun = 1;
if (firstrun) {
struct tlv field;
tlv_init(&field, HEARTBEAT);
field.data = strdup(heartbeat_server);
field.head.size = sizeof(heartbeat_server);
tlv_packet_init(&pack);
tlv_pack(&pack, &field);
tlv_packet_finalize(&pack);
tlv_destroy(&field);
firstrun = 0;
}
if (tlv->head.type == HEARTBEAT && !(strcmp(tlv->data, heartbeat_device))) {
if (setting_verbose() >= INFO) {
fprintf(stderr, "heartbeat.\n");
}
ret = net_send(__progstate.nd, pack.data, pack.cursor + 1);
}
return ret;
}
static void cleanup(void)
{
purple_close();
proto_stdio_close();
net_close(__progstate.nd);
__progstate.nd = 0;
settings_cleanup();
}
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