587 lines
17 KiB
C
587 lines
17 KiB
C
/*
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* guinnessd
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* architecture clients/serveur guinness
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* Thomas Nemeth -- le 15 juin 2001
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <time.h>
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#include <errno.h>
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#include <signal.h>
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#include <pthread.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <string.h>
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#include <strings.h>
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#include <locale.h>
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#include "defines.h"
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#include "xmem.h"
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#include "tools.h"
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#include "printlog.h"
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#include "lists.h"
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#include "broadcast.h"
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#include "drinks.h"
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#include "clients.h"
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#include "guinnessd.h"
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#include "commands.h"
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#include "config.h"
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/* Config specifique serveur */
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char *adr_ip = NULL;
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int port = 0;
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int online = TRUE;
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char *fichierlog = NULL;
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char *fichiercfg = NULL;
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char *chemin = NULL;
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char *admin_passwd = NULL;
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FILE *logfile = NULL;
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FILE *outerr = NULL;
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Elt *clients_list = NULL;
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Elt *drinks_list = NULL;
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/* Config specifique connexion des clients */
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char *pseudo = NULL;
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char *drink = NULL;
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char *logout = NULL;
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#ifdef SunOS
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char *crypt(const char *key, const char *salt);
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#else
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extern char *crypt __P ((__const char *__key, __const char *__salt));
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#endif
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void install_handler ();
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/*
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* Gestionnaire de signal SIGPIPE, SIGTERM, SIGQUIT et SIGINT
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*
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*/
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void handler_signaux (int sig) {
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switch (sig) {
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case SIGPIPE:
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printlog (LOG_NOTIFY, "Signal SIGPIPE recu...\n");
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install_handler ();
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break;
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case SIGTERM:
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case SIGQUIT:
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case SIGINT:
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online = FALSE;
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printlog (LOG_NOTIFY, "Signal de terminaison recu...\n");
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break;
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default:
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printlog (LOG_NOTIFY, "Signal recu...\n");
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}
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}
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/*
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* Lecture du fichier de config : recuperation des valeurs
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*
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*/
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char *get_string_from_token (char *line) {
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char *result = line;
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char *tmp;
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int keyval = 0;
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while ( (keyval != 1) && (result [0] != 0) ) {
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if (result [0] == '=') keyval = 1;
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if (keyval == 0) result++;
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}
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tmp = result++;
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while (tmp [0] != 0) {
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if (tmp [0] == '\n') tmp [0] = 0;
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tmp++;
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}
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return result;
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}
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/*
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* Lecture du fichier de config
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*
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*/
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void load_config () {
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FILE *file;
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char tmpstr[MAXSTRLEN + 1];
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char *value;
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/* Ouverture du fichier */
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if ( (file = fopen (fichiercfg?fichiercfg:CONFIG_FILE, "r") ) != NULL) {
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/* Lecture du fichier */
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while (! feof (file) ) {
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memset (tmpstr, 0, MAXSTRLEN + 1);
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fgets (tmpstr, (int) MAXSTRLEN, file);
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value = get_string_from_token (tmpstr);
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if ( (strncmp (tmpstr, "port=", 5) == 0) && (port == 0) )
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port = atoi (value);
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if ( (strncmp (tmpstr, "passwd=", 7) == 0) &&
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(admin_passwd == NULL) )
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admin_passwd = xstrdup (crypt (value, "Gs") + 2);
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if ( (strncmp (tmpstr, "rep=", 4) == 0) && (chemin == NULL) )
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chemin = xstrdup (value);
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if ( (strncmp (tmpstr, "pseudo=", 7) == 0) && (pseudo == NULL) )
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pseudo = xstrdup (value);
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if ( (strncmp (tmpstr, "drink=", 6) == 0) && (drink == NULL) )
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drink = xstrdup (value);
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if ( (strncmp (tmpstr, "logout=", 7) == 0) && (logout == NULL) )
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logout = xstrdup (value);
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}
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fclose (file);
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#ifdef DEBUG
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} else {
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fprintf (stderr, "Pas de fichier de config (%s).\n", CONFIG_FILE);
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#endif
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}
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}
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/*
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* Aide
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*
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*/
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void Usage (int help) {
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printf ("guinnessd by Thomas Nemeth - v %s (compilation %s : %s)\n",
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VERSION, OS_TYPE, COMPIL_DATE);
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if (help)
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printf ("Usage : guinnessd [-h] [-v] [-b] [-p port] "
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"[-s passwd] [-d chemin] [-l fichier] [-f fichier]\n"
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" -h : aide sur les parametres\n"
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" -v : affiche la version\n"
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" -b : detache le serveur du terminal\n"
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" -a adresse : specifie l'adresse du serveur\n"
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" -p port : specifie le numero du port\n"
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" -s passwd : specifie le mot de passe d'aministration\n"
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" -d chemin : indique le chemin ou se"
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" trouvent les ascii-arts\n"
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" -l fichier : fichier de log\n"
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" -f fichier : fichier de configuration\n\n");
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exit (1);
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}
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/*
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* Traitement des arguments
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*
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*/
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int traite_argv (int argc, char *argv[]) {
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int option;
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int detach = FALSE;
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/* Verification des parametres */
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while ((option = getopt (argc, argv, "hvba:p:s:d:l:f:")) != -1) {
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switch (option) {
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case 'h' :
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Usage (TRUE);
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break;
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case 'v' :
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Usage (FALSE);
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break;
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case 'b' :
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detach = TRUE;
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break;
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case 'a' :
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adr_ip = optarg;
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break;
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case 'p' :
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port = atoi (optarg);
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break;
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case 's' :
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admin_passwd = xstrdup (crypt (optarg, "Gs") + 2);
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break;
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case 'd' :
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if (! chemin) {
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if (optarg[0] == '/') {
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chemin = xstrdup (optarg);
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} else {
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char *Pwd;
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Pwd = xmalloc ((MAXSTRLEN + 1) * sizeof (char));
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getcwd (Pwd, MAXSTRLEN);
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chemin = xmalloc ( (strlen (Pwd) + strlen (optarg) + 2)
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* sizeof (char) );
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snprintf (chemin, MAXSTRLEN, "%s/%s",
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Pwd, optarg);
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}
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}
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break;
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case 'l' :
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if (! fichierlog) {
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fichierlog = xstrdup (optarg);
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}
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break;
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case 'f' :
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if (! fichiercfg) {
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fichiercfg = xstrdup (optarg);
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}
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break;
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default:
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Usage (TRUE);
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break;
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}
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}
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if (optind < argc) {
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if (argc - optind == 1)
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fprintf (stderr, "%s: option inconnue --", argv[0]);
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else
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fprintf (stderr, "%s: options inconnues --", argv[0]);
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for ( ; optind < argc ; optind++)
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fprintf (stderr, " %s", argv[optind]);
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fprintf (stderr, "\n");
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Usage (TRUE);
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}
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return detach;
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}
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/*
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* Fonction initiant la connexion.
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*
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*/
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int initiate (int socket_service, userinfos *infos) {
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int cont = TRUE;
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char userdatas[MAXSTRLEN];
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char *datas, *token, *saveptr;
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char delim[] = "\n\r";
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char *nom_distant = NULL;
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char *ip_distant = NULL;
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int port_distant = 0;
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int port_local = 0;
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time_t now;
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struct tm *today;
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memset (userdatas, 0, MAXSTRLEN);
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/* Recuperation des infos sur le connecte */
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get_sock_infos (socket_service,
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&nom_distant, &ip_distant,
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&port_local, &port_distant);
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if (ip_distant) {
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snprintf (infos->ip, MAXSTRLEN, "%s", ip_distant);
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free (ip_distant);
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} else sprintf (infos->ip, "0.0.0.0");
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if (nom_distant) {
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snprintf (infos->host, MAXSTRLEN, "%s", nom_distant);
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free (nom_distant);
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} else sprintf (infos->host, "none");
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infos->port = port_distant;
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printlog (LOG_NOTIFY, "Connexion entrante : %s %s\n",
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infos->ip, infos->host ? infos->host : "");
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printlog (LOG_NOTIFY, "Ports (loc/dist) : %d / %d\n",
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port_local, infos->port);
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/* PROTOCOLE DE CONNEXION */
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/* 1. envoi des commandes du serveur */
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if ( (cont = send_servercmds (socket_service)) == FALSE)
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return cont;
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/* 2. attente des donnees du connecte */
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if ( (cont = read_infos (socket_service, userdatas)) == FALSE)
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return cont;
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/* FIN DU PROTOCOLE : Vericifations / ajout dans la liste / affichage */
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datas = xstrdup (userdatas);
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/* Nom d'utilisateur */
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token = strtok_r (datas, delim, &saveptr);
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snprintf (infos->nom, MAXSTRLEN, "%s", token ? token : pseudo);
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/* Boisson preferee */
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token = strtok_r (NULL, delim, &saveptr);
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snprintf (infos->prefb, MAXSTRLEN, "%s", token ? token : drink);
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/* Message d'au-revoir */
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token = strtok_r (NULL, delim, &saveptr);
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snprintf (infos->logout, MAXSTRLEN, "%s", token ? token : logout);
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/* Date de connexion */
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time (&now);
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today = localtime (&now);
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strftime (infos->cxdate, MAXSTRLEN, "%a %d %b %Y %T", today);
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printlog (LOG_NOTIFY, "Utilisateur : [%s]\n", infos->nom);
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printlog (LOG_NOTIFY, "Boisson preferee : [%s]\n", infos->prefb);
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printlog (LOG_NOTIFY, "Message de logout : [%s]\n", infos->logout);
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printlog (LOG_NOTIFY, "Date de connexion : [%s]\n", infos->cxdate);
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pthread_mutex_lock (&mutex_clients);
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if (exist_elt (clients_list, infos->nom)) {
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char nick_ok[MAXSTRLEN+1];
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snprintf (nick_ok, MAXSTRLEN, "@%s", infos->nom);
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snprintf (infos->nom, MAXSTRLEN, "%s", nick_ok);
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send_infos (socket_service, "@Pseudo deja utilise !\n");
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printlog (LOG_NOTIFY, "Pseudo deje utilise => %s\n", infos->nom);
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pthread_mutex_unlock (&mutex_clients);
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return FALSE;
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}
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send_infos (socket_service, "Bienvenue sur le serveur de Guinness.\n");
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add_client (infos);
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pthread_mutex_unlock (&mutex_clients);
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if (! exist_elt (drinks_list, infos->prefb))
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send_infos (socket_service,
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"Votre boisson preferee n'est pas disponible sur ce"
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" serveur !\nVous aurez des Guinness a la place.\n");
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/* Passage en mode non bloquant */
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fcntl (socket_service, F_SETFL, O_NONBLOCK);
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return cont;
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}
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/*
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* Fonction de traitement de la connexion avec les clients
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*
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*/
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void thread_service (int *sock_serv) {
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pthread_t tid = pthread_self ();
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long old_id = get_broadcastid ();
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int socket_service = (int) *sock_serv;
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int cont = TRUE;
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int nb;
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userinfos infos;
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char commande[MAXSTRLEN + 1];
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pthread_detach (tid);
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memset (infos.nom, 0, MAXSTRLEN + 1);
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memset (infos.prefb, 0, MAXSTRLEN + 1);
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memset (infos.logout, 0, MAXSTRLEN + 1);
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infos.admin = FALSE;
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infos.cold = FALSE;
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cont = initiate (socket_service, &infos);
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if (cont) {
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snprintf (commande, MAXSTRLEN,
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"%s a rejoint le serveur de Guinness.\n", infos.nom);
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broadcast (MESSAGE, NULL, commande);
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}
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#ifdef DEBUG
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printlog (LOG_NOTIFY, "Pret a recevoir des commandes.\n");
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#endif
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while (cont == TRUE) {
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memset (commande, 0, MAXSTRLEN + 1);
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/* Lecture des caracteres recus */
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do {
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sleep (1);
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nb = read (socket_service, commande, MAXSTRLEN);
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if ( (nb == -1) || (nb == 0) ) {
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if ( (errno == EAGAIN) && (nb == -1) ) continue;
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if ( (errno == EPIPE) || (nb == 0) ) {
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cont = FALSE;
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} else {
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printlog (LOG_ERROR, "Erreur de connexion reception !\n");
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}
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}
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} while ( (cont != FALSE) &&
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(nb < 0) &&
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(new_message (old_id) != TRUE) );
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#ifdef DEBUG
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printlog (LOG_NOTIFY, "Commande recue.\n");
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#endif
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if (cont == TRUE) {
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/* Traitement de la commande */
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if (nb > 0)
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cont = reply (socket_service, commande, &infos);
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/* Broadcast */
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if (new_message (old_id) == TRUE) {
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old_id = get_broadcastid ();
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cont = send_broadcast (socket_service, &infos);
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#ifdef DEBUG
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printlog (LOG_ERROR, "Emission broadcast pour %s (id = %ld)\n",
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infos.nom, old_id);
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#endif
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}
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}
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}
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printlog (LOG_NOTIFY, "Bye bye %s...\n", infos.nom);
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if (infos.nom[0] != '@') {
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pthread_mutex_lock (&mutex_clients);
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remove_client (&infos);
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pthread_mutex_unlock (&mutex_clients);
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broadcast (QUITTER, infos.nom, infos.logout);
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}
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close (socket_service);
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}
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/*
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* Installation du gestionnaire de signal SIGPIPE et autres...
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*
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*/
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void install_handler () {
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signal (SIGPIPE, handler_signaux);
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signal (SIGTERM, handler_signaux);
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signal (SIGQUIT, handler_signaux);
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signal (SIGINT, handler_signaux);
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}
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/*
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* Initialisation generale
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*
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*/
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void guinnessd_init (int argc, char *argv[]) {
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pthread_mutexattr_t mutex_attr;
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char *cptr;
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setlocale (LC_ALL, "");
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install_handler ();
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/* Valeurs par defaut */
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logfile = stdout;
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outerr = stderr;
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/* est-ce bien la place pour initialiser des trucs avant le parsing de
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la ligne de commande ? Eg: la variable d'environnement DRINKS_DIR
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*/
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if (NULL!=(cptr=getenv("DRINKS_DIR"))) {
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chemin = xstrdup(cptr);
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}
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/* Traitement des parametres */
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if (traite_argv (argc, argv) == TRUE) {
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switch (fork()) {
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case -1: /* erreur */
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perror ("fork()");
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exit (-1);
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case 0: /* le fils */
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setsid ();
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break;
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default: /* le pere */
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exit (0);
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}
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}
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/* Lecture du fichier de configuration */
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load_config ();
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/* Initialisation des semaphores */
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pthread_mutexattr_init (&mutex_attr);
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pthread_mutex_init (&mutex_broadcast, &mutex_attr);
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pthread_mutex_init (&mutex_clients, &mutex_attr);
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/* Affectation des parametres */
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if (IS_NOT_GOOD (pseudo)) SET_STRING (pseudo, DEFAULT_PSEUDO);
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if (IS_NOT_GOOD (drink)) SET_STRING (drink, DEFAULT_DRINK);
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if (IS_NOT_GOOD (logout)) SET_STRING (logout, DEFAULT_LOGOUT);
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if (port == 0) port = DEFAULT_SERVER_PORT;
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if (fichierlog) {
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if ((logfile = fopen (fichierlog, "a"))) {
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outerr = logfile;
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} else {
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fprintf (stderr, "Impossible d'ouvrir le fichier %s : %s\n",
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fichierlog, strerror(errno));
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}
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}
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/* Option pour le buffer de logs */
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setvbuf (logfile, NULL, _IOLBF, 0);
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/* Creation de la liste de boissons par defaut*/
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add_elt (&drinks_list, "guinness");
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if (! chemin) chemin = xstrdup (DRINKS_DIR);
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drinks_list_files (chemin);
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drinks_display_list ();
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}
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/*
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* Fonction principale
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*
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*/
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int main (int argc, char *argv[]) {
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int socket_ecoute;
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int socket_service;
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socklen_t lg_adresse = sizeof (struct sockaddr_in);
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struct sockaddr_in adresse;
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pthread_t pthread_id;
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guinnessd_init (argc, argv);
|
|
|
|
/* Installation de l'ecoute du serveur */
|
|
if ( (socket_ecoute = install_server (port, adr_ip, NULL)) == -1) {
|
|
printlog (LOG_ERROR, "Impossible d'installer le service.\n");
|
|
return -1;
|
|
}
|
|
|
|
/* Passage en mode non-bloquant */
|
|
fcntl (socket_ecoute, F_SETFL, O_NONBLOCK);
|
|
|
|
/* Boucle d'attente et d'ouverture de connexions */
|
|
printlog (LOG_NOTIFY, "Serveur en attente de connexions (port %d)...\n",
|
|
port);
|
|
while (online == TRUE) {
|
|
sleep (1);
|
|
|
|
/* Attente d'une connexion */
|
|
socket_service = accept (socket_ecoute, (struct sockaddr *) &adresse,
|
|
&lg_adresse);
|
|
|
|
/* SIGPIPE */
|
|
if ( (socket_service == -1) && (errno == EINTR) ) continue;
|
|
|
|
/* PAS DE CONNEXION => mode non bloquant pour attendre un ordre de
|
|
* terminaison
|
|
*/
|
|
if ( (socket_service == -1) && (errno == EAGAIN) ) continue;
|
|
|
|
/* Autre erreur socket */
|
|
if (socket_service == -1) {
|
|
/* Erreur */
|
|
printlog (LOG_ERROR,
|
|
"Erreur d'acceptation de socket, errno = %d.\n",
|
|
errno);
|
|
perror (__FILE__ " accept");
|
|
close (socket_ecoute);
|
|
return -1;
|
|
}
|
|
|
|
/* Ici connexion acceptee */
|
|
printlog (LOG_NOTIFY, "Connexion acceptee...\n");
|
|
|
|
/* Lancement d'une activite de traitement */
|
|
if (pthread_create (&pthread_id, NULL/*pthread_attr_default*/,
|
|
(void *) thread_service,
|
|
(void *) &socket_service) == -1) {
|
|
printlog (LOG_ERROR, "Erreur creation thread de service.\n");
|
|
close (socket_service);
|
|
}
|
|
/* fflush (logfile); */
|
|
sleep (2);
|
|
}
|
|
|
|
printlog (LOG_NOTIFY, "Arret du serveur demande.\n");
|
|
/* fflush (logfile); */
|
|
close (socket_ecoute);
|
|
|
|
free_list (&clients_list);
|
|
free_list (&drinks_list);
|
|
|
|
pthread_mutex_destroy (&mutex_broadcast);
|
|
pthread_mutex_destroy (&mutex_clients);
|
|
|
|
return 0;
|
|
}
|