Fixed the update-libraries script (thanks to Anderson Souza) and added a basic Linux daemon for the server

Server/CMakeLists.txt

@@ -0,0 +1,11 @@
+cmake_minimum_required(VERSION 2.6)
+project(NiotsoServer)
+
+if(WIN32)
+else()
+    set(NIOTSOSERVER_SOURCES
+        Server.cpp
+    )
+    add_executable(niotsod-vanilla ${NIOTSOSERVER_SOURCES})
+    target_link_libraries(niotsod-vanilla)
+endif()

Server/Server.cpp

@@ -16,4 +16,161 @@
 
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
+*/
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <syslog.h>
+#include <netinet/in.h>
+#include <sys/epoll.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include "Server.hpp"
+
+#define SHUTDOWN(X)      do { syslog(LOG_INFO, "<info> Could not recover from errors. Shutting down."); \
+                              exitval = EXIT_FAILURE; goto X; } while(0)
+#define SHUTDOWN_M(X, Y) do { syslog(LOG_ERR, "<error> %s (%s)", X, strerror(errno)); \
+                              SHUTDOWN(Y); } while(0)
+
+//IPV6_V6ONLY
+
+static void term(int)
+{
+}
+
+int main(int, char **)
+{
+    const pid_t pid = fork();
+    if(pid < 0){
+        const char *msg1 = "<error> Failed to create child process (%s).", *msg2 = strerror(errno);
+        openlog(SERVER_NAME, 0, LOG_DAEMON);
+        syslog(LOG_ERR, msg1, msg2);
+        closelog();
+        fprintf(stderr, msg1, msg2);
+        fprintf(stderr, "\n");
+        return EXIT_FAILURE;
+    }else if(pid > 0)
+        return EXIT_SUCCESS;
+
+    int exitval = EXIT_SUCCESS, sockfd, epollfd;
+    { //New scope required for error handling
+    int ret;
+    FILE * fd;
+
+    umask(0);
+
+    openlog(SERVER_NAME, LOG_PID, LOG_DAEMON);
+
+    if(setsid() < 0)
+        SHUTDOWN_M("Failed to create session", close_msg);
+
+    if(chdir(CONFIG_DIR) < 0)
+        SHUTDOWN_M("Failed to change into \""CONFIG_DIR"\"", close_msg);
+
+    close(STDIN_FILENO);
+    close(STDOUT_FILENO);
+    close(STDERR_FILENO);
+
+    struct sigaction sigact;
+    sigact.sa_handler = term;
+    sigemptyset(&sigact.sa_mask);
+    sigact.sa_flags = 0;
+    sigaction(SIGTERM, &sigact, NULL);
+    sigaction(SIGINT, &sigact, NULL);
+
+    syslog(LOG_INFO, "<info> "SERVER_NAME" (version "VERSIONSTR") is starting...");
+
+    fd = fopen("network.conf", "r");
+    if(!fd)
+        SHUTDOWN_M("Failed to open \""CONFIG_DIR"/network.conf\"", close_msg);
+    unsigned int port = 0;
+    ret = fscanf(fd, "%u", &port);
+    fclose(fd);
+    if(ret < 0)
+        SHUTDOWN_M("Failed to read \""CONFIG_DIR"/network.conf\"", close_msg);
+    if(port > 65535){
+        syslog(LOG_ERR, "<error> Invalid port '%u' specified in \""CONFIG_DIR"/network.conf\".", port);
+        SHUTDOWN(close_msg);
+    }
+
+    sockfd = socket(AF_INET6, SOCK_DGRAM, 0);
+    if(sockfd < 0)
+        SHUTDOWN_M("Failed to open socket", close_msg);
+
+    int flags = fcntl(sockfd, F_GETFL, 0);
+    if(flags < 0)
+        SHUTDOWN_M("Failed to read socket flags", close_socket);
+    if(fcntl(sockfd, F_SETFL, flags | O_NONBLOCK) < 0)
+        SHUTDOWN_M("Failed to set socket flags", close_socket);
+
+    sockaddr_in6 server_addr, client_addr;
+    memset(&server_addr, 0, sizeof(sockaddr_in6));
+    memset(&client_addr, 0, sizeof(sockaddr_in6));
+    server_addr.sin6_family = AF_INET6;
+    server_addr.sin6_port   = htons((uint16_t) port);
+    server_addr.sin6_addr   = in6addr_any;
+    client_addr.sin6_family = AF_INET6;
+    client_addr.sin6_addr   = in6addr_any;
+
+    if(bind(sockfd, (const sockaddr*) &server_addr, sizeof(sockaddr_in6)) < 0)
+        SHUTDOWN_M("Failed to bind to socket", close_socket);
+
+    epollfd = epoll_create(1);
+    if(epollfd < 0)
+        SHUTDOWN_M("Failed to create an epoll handle", close_socket);
+
+    epoll_event epev[1];
+    epev[0].events = EPOLLIN | EPOLLPRI;
+    epev[0].data.fd = sockfd;
+    if(epoll_ctl(epollfd, EPOLL_CTL_ADD, sockfd, epev) < 0)
+        SHUTDOWN_M("Failed to register the socket to the epoll handle", close_epoll);
+
+    //Now that we're running, stop being terminate-on-failure-happy
+    syslog(LOG_INFO, "<info> Running.");
+
+    /****
+    ** Listen loop
+    */
+
+    int eventcount;
+    while((eventcount = epoll_wait(epollfd, epev, 1, -1)) >= 0){
+        if(eventcount == 0)
+            continue;
+        else if(epev[0].events & EPOLLERR)
+            SHUTDOWN_M("Socket closed unexpectedly with EPOLLERR", close_epoll);
+        else if(epev[0].events & EPOLLHUP)
+            SHUTDOWN_M("Socket closed unexpectedly with EPOLLHUP", close_epoll);
+        else if(!(epev[0].events & EPOLLIN) && !(epev[0].events & EPOLLPRI))
+            continue;
+
+        uint8_t packetdata[1500];
+        socklen_t addrlen = sizeof(sockaddr_in6);
+        ssize_t packetsize = recvfrom(epev[0].data.fd, packetdata, 1500, 0, (sockaddr*) &client_addr, &addrlen);
+        if(packetsize < 0){
+            if(errno == EINTR || errno == ECONNRESET || errno == ENOTCONN || errno == ETIMEDOUT)
+                continue;
+
+            SHUTDOWN_M("Socket closed unexpectedly on call to recvfrom", close_epoll);
+        }
+
+        //Pass the packet down (even zero-length packets might be meaningful in the protocol)
+        //...
+    }
+
+    /****
+    ** Shutdown
+    */
+
+    }
+    close_epoll:  close(epollfd);
+    close_socket: close(sockfd);
+    close_msg:    syslog(LOG_INFO, "<info> Shut down gracefully.");
+    closelog();
+
+    return exitval;
+}

Server/Server.hpp

@@ -0,0 +1,24 @@
+/*
+    Niotso Server - Niotso daemon based on PostgreSQL
+    Server.hpp
+    Copyright (c) 2012 Niotso Project <http://niotso.org/>
+    Author(s): Fatbag <X-Fi6@phppoll.org>
+
+    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 <http://www.gnu.org/licenses/>.
+*/
+
+#define SERVER_NAME "niotsod-vanilla"
+#define CONFIG_DIR  "/etc/"SERVER_NAME
+
+#define VERSIONSTR "0.0.0"