created ca server file

it is slightly modified server file - gonna change stuff in future commits

src/chat/main/authority.c

@@ -0,0 +1,86 @@
+/*
+This is part of WHY2
+Copyright (C) 2022 Václav Šmejkal
+
+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 3 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <unistd.h>
+
+#include <pthread.h>
+
+#include <why2/chat/config.h>
+#include <why2/chat/flags.h>
+#include <why2/chat/misc.h>
+
+#include <why2/memory.h>
+#include <why2/misc.h>
+
+int main(void)
+{
+    why2_check_version(); //CHECK FOR UPDATES
+    why2_chat_init_authority(); //CREATE AUTHORITY DIRECTORY
+
+    int listen_socket = socket(AF_INET, SOCK_STREAM, 0); //CREATE CA SERVER SOCKET
+    pthread_t thread;
+    size_t line_length_buffer = 0;
+    char *line_buffer = NULL;
+
+    if (listen_socket < 0) why2_die("Failed creating socket.");
+
+    //DEFINE CA SERVER ADDRESS
+    struct sockaddr_in server_addr;
+    server_addr.sin_family = AF_INET;
+    server_addr.sin_port = htons(WHY2_CHAT_AUTHORITY_PORT);
+    server_addr.sin_addr.s_addr = INADDR_ANY;
+
+    //BIND SOCKET
+    if (bind(listen_socket, (struct sockaddr *) &server_addr, sizeof(server_addr)) < 0) why2_die("Failed binding socket.");
+
+    //LISTEN
+    if (listen(listen_socket, WHY2_MAX_CONNECTIONS) < 0) why2_die("Binding failed.");
+
+    printf("CA server enabled.\n\n");
+
+    pthread_create(&thread, NULL, why2_accept_thread, &listen_socket);
+
+    for (;;)
+    {
+        if (getline(&line_buffer, &line_length_buffer, stdin) == -1) why2_die("Reading input failed.");
+
+        if (strcmp(line_buffer, WHY2_CHAT_COMMAND_PREFIX WHY2_CHAT_COMMAND_EXIT "\n") == 0) //USER REQUESTED PROGRAM EXIT
+        {
+            printf("Exiting...\n");
+            break;
+        }
+    }
+
+    //QUIT COMMUNICATION
+    why2_clean_connections(); //STOP LISTENING; DISCONNECT ALL USERS
+    why2_clean_threads(); //STOP WAITING FOR MESSAGES
+
+    //DEALLOCATION
+    free(line_buffer);
+    close(listen_socket);
+    pthread_cancel(thread);
+
+    why2_clean_memory(""); //RUN GARBAGE COLLECTOR
+
+    return 0;
+}