Started adding node functionality.

src/nodes.c

@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2017  Ortega Froysa, Nicolás <deathsbreed@themusicinnoise.net>
+ * Author: Ortega Froysa, Nicolás <deathsbreed@themusicinnoise.net>
+ *
+ * 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, 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
+ * 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, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#include "nodes.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+struct node {
+	// The address of the node
+	char *address;
+	unsigned short port;
+	// Whether or not it is a directory node/server
+	int directory;
+	// Useful variables for passing on connections of new nodes
+	unsigned int connections;
+	unsigned int max_connections;
+};
+
+// List of nodes
+static struct node *node_list;
+// Maximum number of nodes
+static unsigned int node_max;
+// Number of nodes in the list
+static unsigned int node_count;
+
+int init_nodes(unsigned int max_nodes) {
+	node_list = calloc(max_nodes, sizeof(struct node));
+	if(!node_list)
+		return 0;
+
+	node_max = max_nodes;
+	node_count = 0;
+
+	return 1;
+}
+
+int resize_node_list(unsigned int new_max_nodes) {
+	if(new_max_nodes <= node_max)
+		return 0;
+
+	void* tmp_list = realloc(node_list, new_max_nodes * sizeof(struct node));
+	if(!tmp_list)
+		return 0;
+
+	node_list = tmp_list;
+
+	return 1;
+}
+
+unsigned int get_node_max() {
+	return node_max;
+}
+
+unsigned int get_node_count() {
+	return node_count;
+}
+
+int add_node(char *addr, unsigned short port) {
+	if(node_count >= node_max)
+		return 0;
+	for(unsigned int i = 0; i < node_count; ++i)
+	{
+		if(strcmp(node_list[i].address, addr) == 0 &&
+				node_list[i].port == port)
+			return 1;
+	}
+	node_list[node_count].address = addr;
+	node_list[node_count].port = port;
+	node_list[node_count].directory = 0;
+	node_list[node_count].connections = 0;
+	node_list[node_count].max_connections = 0;
+
+	node_count++;
+
+	return 1;
+}