Started adding node functionality.

CMakeLists.txt

@@ -0,0 +1,53 @@
+# 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/>.
+
+cmake_minimum_required(VERSION 2.8)
+project(NeoComm)
+
+set(TARGET_NAME "neocomm")
+set(TARGET_VERSION_MAJOR 0)
+set(TARGET_VERSION_MINOR 1)
+
+if(NOT CMAKE_BUILD_TYPE)
+	set(CMAKE_BUILD_TYPE "release")
+endif()
+string(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE)
+message(STATUS "Build Type: ${CMAKE_BUILD_TYPE}")
+
+option(BUILD_SHARED_LIBS
+	"Whether to build a shared object instead of a static." OFF)
+
+include_directories(
+	"include/")
+
+set(SRCS
+	src/nodes.c)
+
+set(CMAKE_C_FLAGS "-std=c99 -Wall -Wextra -Werror -Wfatal-errors -Wmissing-declarations -pedantic-errors")
+set(CMAKE_C_FLAGS_DEBUG "-g -O0")
+set(CMAKE_C_FLAGS_RELEASE "-O3")
+set(CMAKE_C_FLAGS_RELWITHDEBINFO "-g -O3")
+set(CMAKE_C_FLAGS_MINSEZEREL "-Os")
+
+if(NOT CMAKE_BUILD_TYPE MATCHES "debug" AND
+		NOT CMAKE_BUILD_TYPE MATCHES "relwithdebinfo")
+	add_definitions("-DNDEBUG")
+else()
+	add_definitions("-DDEBUG")
+endif()
+
+add_library(${TARGET_NAME} ${SRCS})

include/nodes.h

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+/*
+ * 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/>.
+ */
+
+#pragma once
+
+/**
+ * @brief Initialize the node list.
+ *
+ * @param max_nodes Maximum number of nodes available.
+ *
+ * @return If the operation failed then it will return 0, else it will
+ * return 1.
+ */
+int init_nodes(unsigned int max_nodes);
+
+/**
+ * @brief Enlarge the list.
+ *
+ * @param new_max_nodes New number of maximum nodes.
+ *
+ * @return If the new size is less than or equal to the current size, or
+ * the list failed to be reallocated, then it returns 0, else it returns 1.
+ */
+int resize_node_list(unsigned int new_max_nodes);
+
+/**
+ * @brief Get the maximum number of nodes that can be used.
+ *
+ * @return The maximum number of nodes that can be used..
+ */
+unsigned int get_node_max();
+
+/**
+ * @brief Get the number of nodes there currently are.
+ *
+ * @return The number of nodes remembered.
+ */
+unsigned int get_node_count();
+
+/**
+ * @brief Add a new node to the list with an address (normally IP) and port.
+ *
+ * @param addr Address of the new node (normally an IP, but also DNS).
+ * @param port Port number for new node.
+ *
+ * @return If the node list is full it will return 0, else 1.
+ */
+int add_node(char *addr, unsigned short port);
+
+int remove_node(char *addr, unsigned short port);

src/nodes.c

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+/*
+ * 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;
+}